Threaded cannula depth limiter

Abstract

A surgical access device assembly. The assembly includes a cannula having a working channel and a helical tissue engagement feature disposed along an outer surface of the cannula and configured to stabilize the cannula relative to a wall of a body lumen of a patient. The assembly further includes a depth limiter movably coupled with the cannula. The depth limiter includes a body portion extending about a central axis of the depth limiter and including a protrusion extending radially inward relative to the central axis. The body portion is angularly movable relative to the cannula between a fine adjustment configuration and a coarse adjustment configuration. In the fine adjustment configuration, the protrusion is configured to selectively threadably engage the helical tissue engagement feature. In the coarse adjustment configuration, the protrusion is configured to selectively threadably disengage the helical tissue engagement feature such that the depth limiter is axially translatable along the cannula.

Description

[0001] Priority

[0002] This application claims priority to U.S. Provisional Patent Application 63 / 018,650, entitled “Threaded Cannula Depth Limiter” and filed on May 1, 2020, the disclosure of which is incorporated by reference herein. BACKGROUND

[0003] Some surgical procedures can require a clinician to access a surgical site via a patient’s abdominal cavity. To gain such access, an opening is first formed through the abdominal wall tissue that overlies the abdominal cavity. In some surgical procedures, referred to as “laparoscopic” or “endoscopic” surgery, a relatively small opening is formed through the abdominal wall tissue, and then an elongated instrument is used to access the surgical site, the elongated instrument being inserted through an access device, commonly referred to as a “trocar,” that is positioned within the opening. A conventional trocar typically includes a cannula assembly and a obturator that is removably received within a working channel of the cannula assembly. In use, the obturator cooperates with the cannula assembly, and the combined structure (i.e., the trocar) is directed downward by the clinician through the patient’s abdominal wall so that the distal end of the obturator and cannula assembly extends into the abdominal cavity. The clinician then withdraws the obturator from the cannula assembly so that a surgical instrument can be directed downward through the working channel of the cannula assembly to access the surgical site.

[0004] The following patents disclose cannulas, their components, and other types of surgical interventional devices only as exemplary models: U.S. Patent 7,981,092, entitled "Vibratory Trocar," published July 19, 2011; U.S. Patent 8,226,553, entitled "Access Device with Insert," published July 24, 2012; U.S. Patent 8,251,900, entitled "Surgical Access Devices and Methods Providing Seal Movement in Predefined Paths," published August 28, 2012; U.S. Patent 8,579,807, entitled "Absorbing Fluids in a Surgical Access Device," published November 12, 2013; U.S. Patent 8,568,362, entitled "Surgical Access Device with Sorbents," published October 29, 2013; and U.S. Patent 8,568,362, entitled "Surgical Access Device with Sorbents," published January 28, 2014. U.S. Patent 8,636,686, entitled “Device”; U.S. Patent 8,690,831, entitled “Gas Jet Fluid Removal in a Trocar”, published April 8, 2014; and U.S. Patent 2019 / 0000496, entitled “Method of Suturing a Trocar Path Incision”, published January 3, 2019. The disclosure of each of the above-cited U.S. patents and publications is incorporated herein by reference.

[0005] Although various surgical instruments, including surgical intervention devices and end effectors, and other associated components have been manufactured and used, it is believed that no one has manufactured or used the invention described in the appended claims prior to one or more inventors. Attached Figure Description

[0006] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the general description of the invention given above and the detailed description of the embodiments given below, serve to explain the principles of the invention.

[0007] Figure 1 A perspective view of an exemplary cannula needle having a cannula assembly and a tampon shown in an assembled state is shown;

[0008] Figure 2 It is shown in the disassembled state. Figure 1Side front view of the cannulation assembly and tampon;

[0009] Figure 3A It shows that the clinician is manipulating Figure 1 A lateral cross-sectional view of the trocar penetrating the tissue layer of the abdominal wall;

[0010] Figure 3B It shows Figure 1 An enlarged side sectional view of the cannula, showing its reception in... Figure 3A The distal end of the trocar inside the abdominal cavity;

[0011] Figure 3C It shows Figure 1 A side sectional view of the cannulation assembly, showing how it remains positioned after the tampon is disassembled and removed. Figure 3A The cannulation assembly inside the abdominal wall;

[0012] Figure 3D It shows that Figure 1 The cannulation assembly from Figure 3A A lateral sectional view of the abdominal wall pulled out proximally;

[0013] Figure 4 A perspective view of another exemplary cannula with a cannula assembly and a tampon shown in an assembled state is shown;

[0014] Figure 5 It is shown in the disassembled state. Figure 4 A perspective view of the cannula assembly and tampon, showing the reusable cannula and disposable sealing assembly of the cannula assembly separated from each other, and showing the tampon in a disassembled state;

[0015] Figure 6 It shows the use of Figure 4 A perspective view of another exemplary cannula of the cannula needle, which shows an exemplary depth limiter for selectively positioning the cannula channel around the cannula;

[0016] Figure 7 It shows Figure 6 A perspective view of the depth limiter;

[0017] Figure 8A It shows Figure 6 The bottom front view of the depth limiter shows that the teeth of the depth limiter slidably engage with the flat portion of the cannula, allowing the depth limiter to be in a quick-adjustment configuration.

[0018] Figure 8B It shows something similar to Figure 8A The bottom front view shows Figure 6 The teeth of the depth limiter engage with the helical stabilizing ribs of the insertion tube in a threaded manner, allowing the depth limiter to be in a fine-tuning configuration.

[0019] Figure 9A a perspective view of another example depth limiter selectively positioned about another example cannula tube of a trocar for Figure 4 , showing the first body portion and the second body portion of the depth limiter in a non-timeclocked configuration, wherein at least one tooth of the first body portion and the second body portion threadingly engages a helical stabilizing rib of the cannula tube such that the depth limiter is in a fine adjustment configuration;

[0020] Figure 9B a perspective view similar to Figure 9A , showing the first body portion and the second body portion of the depth limiter of Figure 9A in a timeclocked configuration, wherein the teeth of the first body portion and the second body portion are each slidably engaged with a flat of the cannula tube such that the depth limiter is in a quick adjustment configuration;

[0021] Figure 10A a bottom elevation view of the depth limiter of Figure 9A , showing the first body portion and the second body portion of the depth limiter of Figure 9A in a non-timeclocked configuration such that the depth limiter is in a fine adjustment configuration;

[0022] Figure 10B a bottom elevation view similar to Figure 10A , showing the first body portion and the second body portion of the depth limiter of Figure 9A in a timeclocked configuration and further showing the depth limiter in a quick adjustment configuration;

[0023] Figure 11 a bottom elevation view of another example depth limiter selectively positioned about another example cannula tube of a trocar for Figure 4 , showing two teeth of the depth limiter slidably engaged with respective flats of the cannula tube such that the depth limiter is in a quick adjustment configuration;

[0024] Figure 12 a bottom elevation view of another example depth limiter selectively positioned about another example cannula tube of a trocar for Figure 4 , showing three teeth of the depth limiter slidably engaged with respective flats of the cannula tube such that the depth limiter is in a quick adjustment configuration;

[0025] Figure 13 a perspective view of another example cannula of a trocar for Figure 4 , showing another example depth limiter selectively positioned about a cannula tube of the cannula;

[0026] Figure 14 a perspective view of the depth limiter of Figure 13 is shown;

[0027] Figure 15A a cross-sectional view of the cannula of Figure 13 is shown taken along section line 15A-15A in Figure 13 is shown taken along section line 15A-15A in Figure 13 is shown taken along section line 15A-15A in

[0028] Figure 15B a cross-sectional view of the cannula of Figure 15A is shown taken along section line 15A-15A in Figure 13 is shown taken along section line 15A-15A in

[0029] Figure 16 a perspective view of another exemplary cannula tube for Figure 4 is shown taken along section line 15A-15A in

[0030] Figure 17 a cross-sectional view of the cannula tube of Figure 16 is shown taken along section line 17-17 in Figure 16 is shown taken along section line 17-17 in Figure 16 is shown taken along section line 17-17 in

[0031] Figure 18 a perspective view of another exemplary cannula tube for Figure 4 is shown taken along section line 15A-15A in

[0032] Figure 19 a perspective view of the depth limiter of Figure 18 is shown taken along section line 15A-15A in

[0033] Figure 20 a perspective view of another exemplary cannula tube for Figure 4 is shown taken along section line 15A-15A in

[0034] Figure 21 a top elevational view of the depth limiter of Figure 20 is shown taken along section line 15A-15A in

[0035] Figure 22 a perspective view of another exemplary cannula tube forFigure 4 perspective view of another example depth limiter selectively positioned about the insertion tube of the trocar of

[0036] Figure 23 a perspective view of another example depth limiter is shown including four leg portions; Figure 22 a perspective view of the depth limiter of

[0037] Figure 24 a perspective view of another example depth limiter is shown including four leg portions;

[0038] Figure 25A a perspective view of the depth limiter of Figure 1 coupled to the insertion tube of the trocar of Figure 24 a partial side cross-sectional view of the depth limiter of

[0039] Figure 25B a partial side cross-sectional view of the depth limiter of Figure 1 coupled to the insertion tube of the trocar of Figure 24 a partial side cross-sectional view of the depth limiter of

[0040] Figure 26 a perspective view of another example depth limiter is shown including two leg portions;

[0041] Figure 27 a perspective view of another example depth limiter is shown including three leg portions;

[0042] Figure 28 a perspective view of another example depth limiter is shown including a hub having a notch;

[0043] Figure 29A a top plan view of the depth limiter of Figure 5 coupled to the insertion tube of the trocar of Figure 28 a top plan view of the depth limiter of

[0044] Figure 29B a partial side cross-sectional view of the depth limiter of Figure 5 coupled to the insertion tube of the trocar of Figure 28 a partial side cross-sectional view of the depth limiter of

[0045] Figure 30A a top plan view of the depth limiter of Figure 5 coupled to the insertion tube of the trocar of Figure 28partial side cross-sectional view of the depth limiter of

[0046] Figure 30B shows the cannula assembly of Figure 5 Figure 28 partial side cross-sectional view of the depth limiter of

[0047] Figure 31 shows a top cross-sectional view of another example depth limiter including a fluid chamber and four legs.

[0048] The drawings are not intended to be limiting in any way, and it is contemplated that various embodiments of the application can be carried out in a variety of other ways, including those not necessarily depicted in the drawings. The accompanying drawings incorporated in and forming a part of the specification illustrate several aspects of the present application, and together with the description serve to explain the principles of the application; it being understood, however, that this application is not limited to the precise arrangements, construction order, and instrumentalities shown. DETAILED DESCRIPTION

[0049] The following description of certain examples of the application should not be used to limit the scope of the application. Other examples, features, aspects, embodiments, and advantages of the application will become apparent to those of ordinary skill in the art upon review of the following description of the application in conjunction with the accompanying drawings. A best mode for carrying out the application is presented as a non-limiting example. As will be realized, the application is capable of other different and obvious aspects, all without departing from the application. Accordingly, the drawings and descriptions should be regarded as illustrative in nature and not restrictive.

[0050] For clarity of disclosure, the terms "proximal" and "distal" are defined herein relative to a surgeon or other operator grasping a surgical device. The term "proximal" refers to a position of an element closer to the surgeon, and the term "distal" refers to a position of an element further from the surgeon. Further, to the extent that spatial terms are used herein, such as "top," "bottom," "upper," "lower," "horizontal," "vertical," and the like, such terms are used for exemplary descriptive purposes only and are not intended to be limiting or absolute. In this regard, it will be appreciated that surgical instruments such as those disclosed herein can be used in a variety of orientations and positions other than those shown and described herein.

[0051] Further, the terms "about" and "approximately," as used herein in reference to any numerical value or range, are intended to encompass the exact value recited, as well as suitable tolerances such that the recited feature or combination of features is able to serve its intended purpose as described herein. ​

[0052] I. Exemplary single-use trocar and reusable trocar

[0053] Figures 1-5 Exemplary surgical access devices are shown in the form of a single-use first trocar (10) and a reusable second trocar (110), each configured to provide surgical site access in a laparoscopic surgical procedure. Each trocar (10, 110) includes a cannula assembly (12, 112) having a working channel (14, 114) and an obturator (16, 116) configured to be removably coaxially inserted into the working channel (14, 114) such that the assembled trocar (10, 110) can be directed distally through a patient’s abdominal wall and access a peritoneal cavity, e.g., as described below in connection with Figures 3A-3D .

[0054] A. Exemplary single-use trocar

[0055] As shown in Figures 1-2 , the cannula assembly (12) of the single-use trocar (10) includes a cannula (20) and a seal housing (30). The cannula (20) and the seal housing (30) cooperate to define a working channel (14) that extends longitudinally along a central axis (A) of the trocar (10). In particular, the working channel (14) is defined by an inner lumen of the cannula (20) that communicates with a hollow interior of the seal housing (30). The cannula assembly (12) is configured to receive an elongate surgical instrument distally through the working channel (14) to provide access to a surgical site within a patient’s peritoneal cavity. As described in greater detail below, the seal housing (30) houses a pair of sealing structures that define a sealing assembly configured to maintain insufflation to the patient’s peritoneal cavity while allowing passage of surgical instruments and tissue debris along the working channel (14).

[0056] The cannula (20) of the present version can include a bell-shaped hub (not shown) at a proximal end of the cannula and an elongate cylindrical tube (22) extending distally from the hub and terminating at an angled cannula tip (24). An outer surface of the cannula tube (22) includes a plurality of tissue gripping features in the form of annular ribs (26) arranged axially along an intermediate portion of the cannula tube (22). The ribs (26) are configured to grip abdominal wall tissue layers through which the cannula (20) is inserted and thereby help stabilize the cannula (20) in axial and radial directions when the cannula (20) is positioned within an opening formed in a patient’s abdominal wall.

[0057] More specifically, the tissue gripping ribs (26) of the present example are formed in the sidewall of the cannula tube (22) as annular scallops such that each rib (26) tapers radially inward in the distal direction from a radially outermost edge of the rib (26). Thus, the radially outermost edges of the ribs 26 are generally flush with the un-ribbed proximal and distal portions of the cannula tube (22). The resulting configuration of the ribs (26) promotes advancement of the cannula tube (22) through a tissue layer in the distal direction and discourages retraction of the cannula tube (22) through the tissue layer in the opposite proximal direction. Advantageously, this configuration prevents inadvertent withdrawal of the cannula tube (22) from the patient's abdominal wall during a surgical procedure. It will be appreciated, however, that in other versions of the trocar (10), the cannula tube (22) can be provided with various other types of tissue gripping features. For example, the cannula tube (22) can include tissue gripping features in the form of one or more helical ribs that extend around at least an intermediate portion of the cannula tube (22) and can be scalloped similar to the ribs (26).

[0058] The sealed housing (30) of the cannula assembly (12) includes a proximal housing portion (32) and a distal housing portion (34) to which the proximal housing portion is removably attached. The proximal housing portion (32) includes a proximal head (36) and a distal base (38) that are secured together. The distal housing portion (34) includes a distal shroud (40) that encircles a proximal hub (not shown) of the cannula (20), a cover plate (42) that is secured to a proximal end of the distal shroud (40), and a latching ring (44) that is rotatably disposed between the distal shroud and the cover plate and has a radially outwardly projecting tab (46). The latching ring (44) is selectively rotatable about the central axis (A) of the trocar (10) between a locked position and an unlocked position via the tab (46). In the locked position, the latching ring (44) locks the proximal housing portion (32) to the distal housing portion (34). In the unlocked position, the latching ring (44) allows the proximal housing portion (32) to be separated from the distal housing portion (34), for example, to directly access a distal sealing structure (not shown) housed within the distal housing portion (34). In some versions, the distal shroud (40) can be integrally formed with the proximal end of the cannula tube (22) such that the distal shroud (40) is a component of the cannula (20).

[0059] Although not shown, the proximal housing portion (32) houses a proximal (or "outer") seal structure and the distal housing portion (34) houses a distal (or "inner") seal structure, both of which are disposed along the central axis (A) of the trocar (10). The proximal and distal seal structures cooperate to define a seal assembly that maintains insufflation to a patient's abdominal cavity during surgical procedures while allowing surgical instruments and tissue debris to pass along the working channel (14). For example, the proximal seal structure can include an annular seal member configured to sealingly engage a shaft of a laparoscopic surgical instrument directed through the working channel (14). The distal end seal structure can include a duckbill seal member configured to maintain the working channel (14) in a sealed state in the absence of a surgical instrument shaft.

[0060] The cannula assembly (12) also includes an insufflation port (50) operably coupled with the proximal end of the cannula (20) and having an adjustable valve in the form of a stopcock valve (52). The insufflation port (50) is configured to direct an insufflation fluid, such as carbon dioxide, from a fluid source (not shown) distally through the working channel (14) and proximate to a patient's abdominal cavity, thereby expanding (or "insufflating") the cavity with the fluid. This expansion of the abdominal cavity creates additional space for easier performance of laparoscopic surgical procedures.

[0061] As Figure 1 and Figure 2As shown, the tampon (16) of the cannula (10) includes a proximal head (60), an elongated cylindrical shaft (62) extending distally from the head (60), and a tapered distal tip (64). The tampon shaft (62) is configured to be received within the working channel (14) of the cannula assembly (12) such that the tampon tip (64) extends distally through the cannula tip (24). The tampon head (60) includes a dome-shaped upper body (66), a base plate (68), and an actuable latching member (70) including a pair of latching arms (72) and a corresponding pair of latching buttons (74). The latching arms (72) are configured to be engaged in corresponding slots (not shown) formed in the top surface of the sealing housing head (36) to connect the tampon (16) to the cannula assembly (12). A latch button (74) is actuable to release the locking arm (72) from the slot, thereby allowing the tampon (16) to separate from the cannulation assembly (12). The tampon (16) also includes a central channel (76) extending longitudinally through the tampon head (60) and the tampon shaft (62), and is configured to receive an endoscope (not shown) therein to provide visualization during insertion of the cannula (10) through the patient's abdominal wall. A clamping rod (78) of the tampon head (60) is pivotable to selectively secure the endoscope within the central channel (76). The central channel (76) and the clamping rod (78) are merely optional features and may be omitted from the tampon (16) in other configurations.

[0062] The cannulation assembly (12) and the tampon (16) may be configured to be discarded after a single use on a patient. In other configurations, one or more components of the cannula (10) may be suitably configured to withstand sterilization and multiple reuses, for example, as described below. Figures 4-5 The cannula (110) is described in more detail.

[0063] B. Exemplary deployment of a trocar to access a patient's abdominal cavity

[0064] Figures 3A-3D An exemplary method is shown for using the aforementioned cannula (10) to pass through the patient's abdominal wall (2) to access the patient's abdominal cavity (1). It should be understood that the abdominal wall (2) comprises a superficial layer extending outwards and a deep layer extending inwards. The superficial layer typically comprises an outer layer of skin (3) and an inner layer of fat (4); while the deeper layers comprise alternating layers of muscle (5) and fascia (6), which are fibrous and flexible and have relatively higher tensile strength than the superficial layers.

[0065] like Figure 3AAs shown, with the packer (16) received within the cannulation assembly (12) and connected to the sealing housing (30), the clinician manipulates the cannula (10) via the packer head (60) and the sealing housing (30) to push the packer tip (64) against the skin (3) and medially toward the abdominal cavity (1) while rotating the cannula (10) back and forth. Continued medial pushing of the cannula (10) further guides the packer tip (64) and the cannula tip (24) distally through the layers of fat (4) and fascia (5) and toward the cavity (1), as... Figure 3B As shown. As discussed above, this step is facilitated by visualization provided by an endoscope (not shown) mounted within the tampon (16). Once the cannula (20) has reached the desired depth in the insertion cavity (1), the clinician releases the tampon head (60) from the sealed housing (30) by pressing the latch button (74), and then withdraws the tampon (16) proximally from the cannula assembly (12), as... Figure 3C As shown. This allows the working channel (14) of the cannulation assembly (12) to freely receive surgical instruments passing distally through it for laparoscopic surgery. As described above, tissue engagement ribs (26) located on the cannulation channel (22) grip the tissue layers (3,4,5) of the abdominal wall (2), thereby providing the cannulation assembly (12) with at least a minimum degree of stability relative to the abdominal wall (2). After the laparoscopic surgery is completed, the clinician grasps the sealing housing (30) and withdraws the cannulation assembly (12) proximally from the abdominal wall (2), as... Figure 3D As shown.

[0066] C. Exemplary reusable trocar with disposable seal assembly

[0067] In some cases, it may be desirable to construct the cannula so that one or more of its components can be sterilized and reused for multiple surgical procedures, while one or more other components can be easily and economically disposed of and replaced after each procedure. Figures 4-5 Another exemplary trocar (110) constructed in this manner is shown, which has a similar structure and function to the trocar (10) described above, unless otherwise described below.

[0068] Similar to the cannula (10), the cannula (110) includes a cannula assembly (112) having a working channel (114) and a tampon (116) configured to be coaxially inserted into the cannula assembly (112) along the working channel (114). The cannula assembly (112) includes a cannula (120) having: a bell-shaped hub (122) located at the proximal end of the cannula; and an elongated cylindrical tube (124) extending distally from the hub (122) and terminating at an angled cannula tip (126). The outer surface of the cannula (124) includes a plurality of tissue gripping features in the form of annular ribs (128) arranged axially along the middle portion of the cannula (124) and similar to the ribs (26) described above.

[0069] The cannulation assembly (112) also includes a sealing assembly (130). Unlike the sealing assembly defined by the sealing housing (30) of the cannula (10), the sealing assembly (130) is constructed as a modular, replaceable unit, designed to releasably engage with the proximal hub (122) of the cannula (120). Figure 5 As best shown, the sealing assembly (130) of this example typically includes an upper frame member (132), an intermediate frame member (134), and a lower frame member (136) arranged coaxially and fixed relative to each other. Although not shown, the proximal (or "outer") sealing structure is supported within the upper frame member (132), while the distal (or "inner") sealing structure is supported within the lower frame member (136). Such sealing structures may be structurally and functionally similar to the proximal and distal sealing structures of the cannula needle (10) described above. The sealing assembly (130) also includes a blow-in port (140) having an adjustable valve in the form of a stopcock valve (142).

[0070] A lower portion of the seal assembly (130) distal of the insufflation port (140) is configured to seat within the proximal hub (122) of the cannula (120) such that an annular seal member (144) disposed circumferentially about the lower portion sealingly engages an inner surface of the cannula hub (122). In this manner, an interior of the seal assembly (130) is in fluid communication with an inner lumen of the cannula (120) to define a working channel (114) of the cannula assembly (112) through which insufflation fluid, surgical instruments, and tissue debris can be directed in the manner generally described above in connection with the trocar (10). The seal assembly (130) can be further configured in accordance with the teachings of one or more of U.S. Patent Publication No. 2019 / 0090905, entitled “Trocar Seal Assemblies,” published March 28, 2019, the disclosure of which is incorporated by reference herein; and / or U.S. Patent Publication No. 2019 / 0380742, entitled “Asymmetric Shaft Seal,” published December 19, 2019, the disclosure of which is incorporated by reference herein.

[0071] As Figure 5 As best shown in FIG. 1, the obturator (116) of the trocar (110) includes a proximal head (150), an elongate cylindrical shaft (152) extending distally from the head (150), and a tapered tip (154) at a distal end of the shaft (152). The obturator head (150) includes a domed upper body (156), a base plate (158), and an actuatable latch member (160) including a pair of downwardly extending latch arms (162) and a corresponding pair of latch buttons (164). The latch arms (162) are configured to be captured within respective slots (138) formed in a top surface of the upper frame member (132) of the seal assembly (130) to couple the obturator (116) with the cannula assembly (112). The latch buttons (164) are actuatable to release the latch arms (162) from the slots (138) and thereby permit the obturator (116) to be uncoupled from the cannula assembly (112).

[0072] The cannula (120) and obturator (116) of the present example are suitably constructed from a robust material, such as surgical steel, such that they can be sterilized and reused for multiple surgical procedures. In contrast, as noted above, the seal assembly (130) is configured as a disposable unit intended to be separated from the cannula (120) and replaced after each procedure. For example, the seal assembly (130) can be constructed from various polymeric materials including plastics and rubbers such that the seal assembly (130) can be readily manufactured and sold at a price that makes the seal assembly (130) suitable for disposal after a single use, similar to the trocar (10) described above.

[0073] II. Exemplary thread depth limiter

[0074] In some cases, the clinician can wish to limit the depth to which the single-use or reusable trocar (10, 110) can be advanced in the abdominal wall (2) (e.g., after the trocar (10, 110) is inserted to a desired location). Limiting the depth to which the trocar (10, 110) can be advanced in the abdominal wall (2) can help prevent the distal tip (64, 154) of the obturator (16, 116) and / or the cannula tip (24, 126) of the cannula assembly (12, 112) from unintentionally accessing a location in the abdominal cavity (1) that is deeper than desired. Preventing over-insertion of the trocar (10, 110) can reduce undesirable contact of the distal tip (64, 154) and / or the cannula tip (24, 126) with anatomical structures contained within the abdominal cavity (1). Preventing over-insertion of the trocar (10, 110) can also avoid unintentionally reducing the available surgical working space within the abdominal cavity (1).

[0075] Alternatively or in addition to limiting the depth to which the single-use or reusable trocar (10, 110) can be advanced in the abdominal wall (2), the clinician can wish to stabilize the trocar (10, 110) relative to the abdominal wall (2) (e.g., after the trocar (10, 110) is inserted to a desired location in the abdominal cavity (1)). The clinician can stabilize the trocar (10, 110) relative to the abdominal wall (2) by avoiding under-insertion of the trocar (10, 110). Stabilizing the trocar (10, 110) relative to the abdominal wall (2) after insertion in the abdominal wall (2) can help prevent the trocar (10, 110) from unintentionally pivoting about the insertion point in the abdominal wall (2) after the clinician releases the trocar (10, 110). Stabilizing the trocar (10, 110) maintains the cannula tip (24, 126), and thus the entry point of the surgical instrument into the abdominal cavity (1), in a desired position and / or orientation relative to the abdominal cavity (1) so that the surgical instrument can be easily directed distally through the trocar (10, 110) at a selected working angle that is convenient for the clinician.

[0076] Accordingly, it can be desirable to provide a device for the trocar (10, 110) that provides both the depth limiting and anti-tilt benefits described above. In addition, it can be desirable to provide one or more features for such a device that enable both fine position adjustment and coarse or rapid position adjustment of the device relative to the trocar (10, 110).

[0077] A. Exemplary depth limiter with stabilizing thread turning teeth

[0078] Figure 6An alternative trocar (120a) for a trocar needle (110) is shown having a bell-shaped hub (122a) at a proximal end of the trocar and an elongate cylindrical channel (124a) extending distally from the hub (122a) and terminating at a trocar tip (126a). An outer surface of the trocar channel (124a) includes a plurality of tissue gripping features in the form of helical ribs (128a) extending around a mid-portion of the trocar channel (124a). The ribs (128a) are configured to grip abdominal wall tissue layers through which the trocar (120a) is inserted and thereby help stabilize the trocar (120a) in both axial and radial directions when the trocar (120a) is positioned within an opening formed in a patient's abdominal wall (2). As shown, Figures 8A-8B the ribs (128a) can each have a radial height (HI) defined between a radially inner root thereof and a radially outer top thereof and can collectively form a major outer cross dimension (Ml) of the mid-portion of the trocar channel (124a) extending diametrically between the outer tops of the ribs (128a). The ribs (128a) can also collectively form a minor outer cross dimension (M2) of the mid-portion of the trocar channel (124a) extending diametrically between the inner roots of the ribs (128a), as best shown in Figure 8A and Figure 8B .

[0079] In the example shown, the outer surface of the trocar channel (124a) also includes a track in the form of a flat (170a) extending longitudinally or axially along the mid-portion and distal portion of the trocar channel (124a) such that the mid-portion and distal portion of the trocar channel (124a) have a generally D-shaped profile. More specifically, the flat (170a) extends along an axial length (L) from the trocar tip (126a) to a proximal-most rib (128a) and along a generally circumferential width (Wl) between the roots of each rib (128a) such that the ribs (128a) are circumferentially interrupted or spaced apart from one another by the width (Wl) of the flat (170a). Thus, although the helical ribs (128a) would otherwise collectively define a single continuous helical thread around the trocar channel (124a), the helical ribs (128) of the present example are discontinuous with respect to one another. In one example, the flat (170a) can be machined onto the trocar channel (124a) after a single continuous helical rib is formed on the trocar channel, to divide such helical rib into the plurality of ribs (128a) shown. The trocar (120a) of the present example can be suitably constructed from a robust material such as surgical steel such that the trocar (120a) can be sterilized and reused for multiple surgical procedures, similar to the trocar (120) and obturator (116) described above.

[0080] Figure 6A first exemplary depth limiter (200) is also shown, which is selectively coupled to the cannulation channel (124a) of the trocar (110). As described in more detail below, the depth limiter (200) can selectively limit the depth to which the trocar (110) can travel distally into the abdominal wall (2).

[0081] like Figures 7-8B As best shown, the depth limiter (200) includes a body portion (202) that is configurable relative to the cannulation tube (124a) in at least one quick (i.e., coarse) adjustment configuration (e.g., Figure 8A ) and at least one finely tuned configuration (e.g., Figure 8B Rotation between (120a and 130). In one example, the body portion (202) may be molded from a polymer material, including one or more plastics. This construction allows the depth restrictor (200) to be considered a single-use unit, intended to be separate from the cannula (120a) and replaced after each procedure. For example, this construction may allow the depth restrictor (200) to be easily manufactured and sold at a certain price point, making the depth restrictor (200) suitable for disposal after single use, similar to the cannula (10) and sealing assembly (130) described above. In other forms, one or more portions of the depth restrictor (200) may be formed from surgical steel or other materials suitable for making the depth restrictor sterilizable and reusable for a variety of surgical procedures.

[0082] In the illustrated example, the depth limiter (200) has a generally hollow top-hat shape profile. To this end, the body portion (202) includes a distal cylindrical hub (210) and a proximal generally annular flange (212) extending radially outwardly from the distal cylindrical hub. The hub (210) defines a generally cylindrical bore (214) extending longitudinally along a central axis (C) of the depth limiter (200) and includes at least one flat tooth (220) extending radially inwardly from a peripheral edge of the bore (214) and configured to selectively threadably engage the ribs (128a) of the cannula conduit (124a) and selectively slidably engage the flats (170a) of the cannula conduit (124a). While a single tooth (220) is illustrated, it will be appreciated that multiple teeth (220) can be arranged axially along the bore (214) (e.g., axially spaced apart from one another by a distance corresponding to the axial spacing between the ribs (128a) such that the teeth (220) can be capable of threadably engaging the ribs (128a) simultaneously) and / or circumferentially about the ribs, as described below. The illustrated flange (212) includes a pair of diametrically opposed finger grips (230) configured to provide a user with a location on the body portion (202) to be grasped for effectively and ergonomically manipulating the body portion (202), such as for rotation of the body portion (202) between a quick adjustment configuration and a fine adjustment configuration, visual and / or tactile indications of which are described in greater detail below.

[0083] In this regard, and as Figure 8A and Figure 8B best shown in FIGS. 2 and 3, the bore (214) can have an internal cross dimension (D1) extending diametrically through the central axis (C) and substantially equal to or slightly greater than a major external cross dimension (M1) of the intermediate portion of the cannula conduit (124a) such that the bore (214) can be sized to at least movably receive the intermediate portion of the cannula conduit (124a).

[0084] The tooth (220) can have a radial height (H2) defined between an inner root of the tooth and an outer tip of the tooth and substantially equal to or slightly less than the height (HI) of the ribs (128a) such that the tooth (220) can be sized to extend radially inwardly relative to the tips of the ribs (128a) and radially outwardly relative to the roots of the ribs (128a).

[0085] The tooth (220) can also have an axial thickness (not shown) defined between a proximal end of the tooth and a distal end of the tooth and substantially equal to or slightly less than the axial spacing between adjacent ribs (128a) such that the tooth (220) can be sized to be received between adjacent ribs.

[0086] The tooth (220) may also have a generally circumferential width (W2) defined between the lateral edges of the tooth and substantially equal to or less than the width (W1) of the flat portion (170a), such that the size of the tooth (220) can be set to be radially or angularly aligned with the flat portion (170a) outside the rib (128a). In this way, the tooth (220) can be configured to selectively engage or thread-engage with the rib (128a) to convert rotation of the depth limiter (200) relative to the cannula (124a) into relatively fine axial adjustment of the depth limiter (200) relative to the cannula (124a), and can be further configured to selectively slidably engage the flat portion (170a) to allow relatively coarse or rapid axial adjustment of the depth limiter (200) relative to the cannula (124a).

[0087] More specifically, and as Figure 8A As shown, when the depth limiter (200) is in a rapid adjustment configuration, the teeth (220) can be radially aligned with and substantially parallel to the flat portion (170a), and radially misaligned with the rib (128a), such that the teeth (220) can slidably engage with the flat portion (170a) and can be threadedly disengaged from the rib (128a). The interaction between the teeth (220) and the flat portion (170a) can be configured to allow rapid axial movement of the depth limiter (200) relative to the cannula (124a), such as by allowing the depth limiter (200) to translate relative to the cannula (124a).

[0088] like Figure 8B As shown, when the depth limiter (200) is in a fine-tuning configuration, the teeth (220) are at least partially radially aligned with the ribs (128a) and at least partially radially misaligned with the flat portion (170a), such that the teeth (220) engage with the ribs (128a) threadedly and slidably disengage from the flat portion (170a). The interaction between the teeth (220) and the ribs (128a) can be configured to limit axial movement of the depth limiter (200) relative to the cannula (124a) and / or allow fine axial movement of the depth limiter (200) relative to the cannula (124a), such as by constraining the depth limiter (200) to a rotatable helical movement relative to the cannula (124a).

[0089] The finger grip (230) can be configured to provide the user with visual and / or tactile indications of the location on the body portion (202) to be gripped in order to effectively and ergonomically rotate the body portion (202) between the rapid adjustment configuration and the fine adjustment configuration, in addition to providing the user with visual and / or tactile indications of the location on the body portion (202) to be gripped in order to effectively and ergonomically translate the depth limiter (200) relative to the cannula tube (124a) when in the rapid adjustment configuration and / or to effectively and ergonomically spiral the depth limiter (200) relative to the cannula tube (124a) when in the fine adjustment configuration.

[0090] During operation and with continued reference to Figures 8A-8B , the depth limiter (200) can initially be positioned around the cannula tube (124a) of the trocar (110) such that the cannula tube (124a) is received within the bore (214) prior to deployment of the trocar (110) into the abdominal cavity (1) of the patient. During deployment of the trocar (110) into the abdominal cavity (1), the body portion (202) can be in either the rapid adjustment configuration or the fine adjustment configuration, as desired.

[0091] In some cases, the clinician can desire to allow for rapid axial movement of the depth limiter (200) relative to the cannula tube (124a) of the trocar (110) during deployment. Accordingly, the clinician can elect to maintain the body portion (202) in the rapid adjustment configuration. By maintaining the body portion (202) in the rapid adjustment configuration, the teeth (220) can be unconstrained by the ribs (128a). More specifically, the teeth (220) can be radially aligned with the flat (170a) to allow for translation of the depth limiter (200) relative to the cannula tube (124a) of the trocar (110), as Figure 8A shown.

[0092] In other instances, the clinician can desire to limit axial movement of the depth limiter (200) relative to the cannulation tube (124a) of the trocar (110) during deployment. For example, the clinician can desire to position the depth limiter (200) along the cannulation tube (124a) at a predetermined axial position corresponding to a desired insertion depth of the cannula (120a) within the cavity (1). Accordingly, the clinician can select to rotate the body portion (202) relative to the cannulation tube (124a) from the quick adjustment configuration toward the fine adjustment configuration. To this end, the clinician can manipulate the depth limiter (200), such as via the finger grip (230), to effectively and ergonomically rotate the body portion (202) toward the fine adjustment configuration. By rotating the body portion (202) toward the fine adjustment configuration, the teeth (220) can be constrained from helical movement by the ribs (128a). More specifically, the teeth (220) can be at least partially radially aligned with the ribs (128a) to allow substantially only helical movement of the depth limiter (200) relative to the cannulation tube (124a), as shown. Figure 8B Once the depth limiter (200) is at the predetermined axial position, the clinician can release the depth limiter (200) while still in the fine adjustment configuration, thereby allowing the threaded engagement between the teeth (220) and the ribs (128a) to retain the depth limiter (200) at the predetermined axial position.

[0093] With the depth limiter (200) positioned about the cannulation tube (124a) in the axially limited or unrestricted state, the clinician can deploy the trocar (110) into the abdominal cavity (1) of the patient, as described above with respect to Figure 3A and Figure 3B to position the cannula (120a) at a desired insertion depth in the cavity (1). With the depth limiter (200) secured to the cannulation tube (124a) during deployment at the predetermined axial position along the cannulation tube (124a) corresponding to the desired insertion depth of the cannula (120a) within the cavity (1), contact between the distal hub (210) of the depth limiter (200) and the abdominal wall (2) can provide a visual and / or tactile indication to the clinician that the cannula (120a) has reached the desired insertion depth in the cavity (1). In this manner, the depth limiter (200) can help prevent the distal tip (154) of the obturator (116) and / or the cannula tip (126a) of the cannula assembly (112) from inadvertently accessing a location in the abdominal cavity (1) deeper than desired during deployment. In other instances, the depth limiter (200) can be secured to the cannulation tube (124a) after the cannula (120a) is positioned at the desired insertion depth in the cavity (1).

[0094] In some cases, it can be desirable to quickly adjust the axial position of the depth limiter (200) along the intubation tube (124a) after the depth limiter (200) has been secured to the intubation tube (124a). Thus, the clinician can selectively manipulate the depth limiter (200) to rotate the body portion (202) relative to the intubation tube (124a) from the fine adjustment configuration toward the quick adjustment configuration, and then can translate the body portion (202) relative to the intubation tube (124a) to a new axial position. Once the depth limiter (200) is in the new axial position, the clinician can selectively manipulate the depth limiter (200) to rotate the body portion (202) relative to the intubation tube (124a) from the quick adjustment configuration to the fine adjustment configuration, and then release the depth limiter (200) while in the fine adjustment configuration, thereby allowing the threaded engagement between the teeth (220) and the ribs (128a) to retain the depth limiter (200) in the new axial position.

[0095] Likewise, it can be desirable to fine tune the axial position of the depth limiter (200) along the intubation tube (124a) after the depth limiter (200) has been secured to the intubation tube (124a). Thus, with the depth limiter (200) in the fine adjustment configuration, the clinician can helically move the body portion (202) relative to the intubation tube (124a) to fine tune the axial position of the depth limiter (200) relative to the intubation tube (124a). During such movement, the clinician can carefully continue to move the body portion (202) along the desired helical path (e.g., such that the depth limiter (200) is briefly placed in the quick adjustment configuration) as the teeth (220) orbit around the flats (170a) to prevent the teeth (220) from inadvertently sliding or "jumping" axially along the flats (170a) past the ribs (128a), and thereby prevent the depth limiter (200) from suddenly translating relative to the intubation tube (124a). Once the depth limiter (200) is in the fine-tuned axial position, the clinician can release the depth limiter (200) while in the fine adjustment configuration, thereby allowing the threaded engagement between the teeth (220) and the ribs (128a) to retain the depth limiter (200) in the fine-tuned axial position.

[0096] Thus, the clinician can adjust the axial position of the depth limiter (200) along the intubation tube (124a), and then can re-secure the depth limiter (200) to the intubation tube (124a) by simply releasing the depth limiter (200) while in the fine adjustment configuration.

[0097] During performance of a laparoscopic surgical procedure, the depth limiter (200) can remain securely coupled to the cannula tubing (124a) with the distal hub (210) of the depth limiter (200) seated against the abdominal wall (2). In this manner, the depth limiter (200) can help prevent the cannula tip (126a) of the cannula assembly (112) from inadvertently accessing a location in the abdominal cavity (1) that is deeper than desired during performance of a laparoscopic surgical procedure.

[0098] After completion of a laparoscopic surgical procedure, the depth limiter (200) can be proximally withdrawn from the abdominal wall (2) along with the cannula assembly (112). The depth limiter (200) can be quickly removed from the cannula tubing (124a) by rotating the body portion (202) relative to the cannula tubing (124a) toward the quick adjustment configuration as described above and subsequently translating the depth limiter (200) distally relative to the cannula tubing (124a). In one example, the depth limiter (200) can be simply disposed after completion of a single laparoscopic surgical procedure.

[0099] B. Exemplary two-piece depth limiter with stabilizing thread turning teeth

[0100] In some cases, it can be desirable to provide a cannula depth limiter having a time- controlled mechanism to prevent inadvertent transition from the fine adjustment configuration to the quick adjustment configuration.

[0101] Figures 9A-10B Another alternative cannula (120b) for a trocar (110) is shown having an elongate cylindrical tubing (124b) extending distally from a hub (not shown) and terminating at a cannula tip (not shown). The outer surface of the cannula tubing (124b) includes a plurality of tissue gripping features in the form of helical ribs (128b) extending around a mid-portion of the cannula tubing (124b). The ribs (128b) are configured to grip abdominal wall tissue layers through which the cannula (120b) is inserted and thereby help stabilize the cannula (120b) in both axial and radial directions when the cannula (120b) is positioned within an opening formed in the abdominal wall (2) of a patient. The ribs (128b) can each have a radial height (HI) defined between an inner root portion thereof and an outer top portion thereof, and can collectively form a major outer cross dimension (Ml) of the mid-portion of the cannula tubing (124b) extending diametrically between the outer top portions of the ribs (128b), and can also collectively form a minor outer cross dimension (M2) of the mid-portion of the cannula tubing (124b) extending diametrically between the inner root portions of the ribs (128b), as best shown in Figure 10A and Figure 10B

[0102] ​In the illustrated example, the outer surface of the cannula tube (124b) further comprises a track in the form of a flat (170b) extending longitudinally or axially at least along the middle portion of the cannula tube (124b) such that at least the middle portion of the cannula tube (124b) has a generally D-shaped profile. More specifically, the flat (170b) extends along an axial length from the cannula tip to the most proximal rib (128b), and along a generally circumferential width (Wl) between the roots of each rib (128b) such that the ribs (128b) are circumferentially interrupted or spaced apart from one another by the width (Wl) of the flat (170b). In one example, the flat (170b) can be machined onto the cannula tube (124b) after a single continuous helical rib is formed on the cannula tube, to divide such helical rib into the illustrated plurality of ribs (128b). The cannula (120b) of the present example can be suitably constructed from a robust material such as surgical steel, such that the cannula (120b) can be sterilized and reused for multiple surgical procedures, similar to the cannula (120b) and the obturator (116) described above.

[0103] Figures 9A-10B A second example depth limiter (300) is also illustrated, which is selectively coupled to the cannula tube (124b) of the trocar (110). Similar to the depth limiter (200), the depth limiter (300) can selectively limit the depth to which the trocar (110) can be advanced distally into the abdominal wall (2).

[0104] As illustrated, the depth limiter (300) comprises first and second body portions (302, 304) that are rotatable relative to the cannula tube (124a) between at least one quick adjustment configuration (e.g., Figure 9B and Figure 10B ) and at least one fine adjustment configuration (e.g., Figure 9A and Figure 10A ), and further rotatable relative to one another between a radially aligned or "time-clocked" configuration (e.g., Figure 9B and Figure 10B ) and at least one radially misaligned or "non-time-clocked" configuration (e.g., Figure 9A and Figure 10A) between the first body portion and the second body portion. In one example, the first body portion and the second body portion (302, 304) can each be molded from a polymeric material, including one or more plastics. Such a construction can allow the depth limiter (300) to be considered a disposable unit, intended to be separated from the cannula (120b) and replaced after each procedure. For example, such a construction can allow the depth limiter (300) to be easily manufactured and sold at a price point that makes the depth limiter (300) suitable for disposal after a single use, similar to the trocar (10) and the seal assembly (130) described above. In other versions, one or more portions of the depth limiter (300) can be formed from surgical steel or other materials suitable to make the depth limiter sterilizable and reusable for multiple surgical procedures.

[0105] In the illustrated example, the depth limiter (300) has a generally hollow top hat shape. To this end, the first body portion (302) includes a distal cylindrical hub (310) and a proximal generally annular flange (312) extending radially outward from the distal cylindrical hub. The hub (310) defines a generally cylindrical bore (314) extending longitudinally along the central axis (C) of the depth limiter (300) and includes at least one flat tooth (320) extending radially inward from a peripheral edge of the bore (314) and configured to selectively threadably engage the rib (128b) of the cannula tubing (124b) and selectively slidably engage the flat (170b) of the cannula tubing (124b). While a single tooth (320) is shown, it will be appreciated that a plurality of first teeth (320) can be arranged axially along the bore (314) (e.g., axially spaced apart from one another by a distance corresponding to the axial spacing between the rib (128b) such that the first teeth (320) can be capable of simultaneously threadably engaging the rib (128b)) and / or circumferentially about the rib, as described below. The illustrated flange (312) includes a pair of diametrically opposed finger grips (330) configured to provide a user with locations on the first body portion (302) to be grasped for efficient and ergonomic manipulation of the first body portion (302), such as for visual and / or tactile indication of the position of the first body portion (302) for rotation between the quick adjustment configuration and the fine adjustment configuration, as described in greater detail below.

[0106] Similarly, the second body portion (304) includes a generally annular collar (340) defining a generally cylindrical bore (342) extending longitudinally along the central axis (C) of the depth limiter (300). As Figure 10AAs best shown, the collar (340) includes at least one second flat tooth (350) extending radially inward from a semi-annular ledge (352) extending radially inward from a peripheral edge of the aperture (342) and configured to selectively threadably engage the ribs (128b) of the cannula conduit (124b) and selectively slidably engage the flats (170b) of the cannula conduit (124b). While a single second tooth (350) is shown, it will be appreciated that a plurality of second teeth (350) can be arranged axially along the aperture (342) (e.g., axially spaced apart from one another by a distance corresponding to the axial spacing between the ribs (128b) such that the second teeth (350) can be capable of simultaneously threadably engaging the ribs (128b)) and / or circumferentially about the ribs, as described below. The illustrated collar (340) also includes a pair of diametrically opposed finger grips (360) configured to be grasped on the second body portion (304) for effectively and ergonomically manipulating the second body portion (304), such as for visually and / or tactilely indicating a position for rotating the second body portion (304) between the quick adjustment configuration and the fine adjustment configuration, as described in greater detail below.

[0107] In this regard, and as Figure 10A and Figure 10B As best shown, the aperture (314) of the first body portion (302) can have an internal transverse dimension (D1) extending diametrically through the central axis (C) and substantially equal to or slightly greater than the major external transverse dimension (M1) of the intermediate portion of the cannula conduit (124b) such that the aperture (314) can be sized to at least movably receive the intermediate portion of the cannula conduit (124b).

[0108] The first tooth (320) can have a radial height (H2) defined between an inner root of the tooth and an outer tip of the tooth and substantially equal to or slightly less than the height (HI) of the ribs (128b) such that the first tooth (320) can be sized to extend radially inward relative to the tips of the ribs (128b) and radially outward relative to the roots of the ribs (128b).

[0109] The first tooth (320) can also have an axial thickness (not shown) defined between a proximal end of the tooth and a distal end of the tooth and substantially equal to or slightly less than the axial spacing between adjacent ribs (128b) such that the first tooth (320) can be sized to be received between adjacent ribs.

[0110] The first tooth (320) can also have a generally circumferential width (W2) defined between lateral edges of the tooth and substantially equal to or less than the width (Wl) of the flat (170b) such that the first tooth (320) can be sized to be radially or angularly aligned with the flat (170b) outside of the rib (128b). In this manner, the first tooth (320) can be configured to selectively mate or threadingly engage with the rib (128b) to translate rotation of the depth limiter (300) relative to the cannula conduit (124b) into a relatively fine axial adjustment of the depth limiter (300) relative to the cannula conduit (124b) and can be further configured to selectively slidably engage the flat (170b) to allow a relatively coarse or rapid axial adjustment of the depth limiter (200) relative to the cannula conduit (124a).

[0111] With continued reference to Figure 10A and Figure 10B The bore (342) of the second body portion (304) can have an inner transverse dimension (D2) extending diametrically through the central axis (C) and substantially equal to or slightly greater than an outer transverse dimension (D3) of the hub (310) such that the bore (342) can be sized to rotatably receive the hub (310). In one example, the first body portion (302) can include a slot (not shown) extending radially through the hub (310) from the bore (314) to an outer surface of the hub and at least partially circumferentially around the hub. Such a slot can be configured to rotatably receive the tab (352) and / or the second tooth (350) of the second body portion (304) such that the second tooth (350) is allowed to extend radially inward into the bore (314) and rotate relative to the first tooth (320), as described in greater detail below.

[0112] The second tooth (350) can have a radial height (H3) defined between an inner root of the tooth and an outer tip of the tooth and substantially equal to or slightly less than the height (HI) of the rib (128b) such that the second tooth (350) can be sized to extend radially inward relative to a tip of the rib (128b) and radially outward relative to a root of the rib (128b). For example, the height (H3) of the second tooth (350) can be substantially equal to the height (H2) of the first tooth (320) such that the first and second teeth (320, 350) can be radially coextensive when radially aligned with one another.

[0113] The second teeth (350) can also have an axial thickness (not shown) defined between a proximal end of the teeth and a distal end of the teeth and substantially equal to or slightly less than the axial spacing between adjacent ribs (128b) such that the second teeth (350) can be sized to be received between adjacent ribs. For example, the thickness of the second teeth (350) can be substantially equal to the thickness of the first teeth (320).

[0114] The second teeth (350) can also have a generally circumferential width (W3) defined between lateral edges of the teeth and substantially equal to or less than the width (Wl) of the flats (170b) such that the second teeth (350) can be sized to be radially or angularly aligned with the flats (170b) outside of the ribs (128b). For example, the width (W3) of the second teeth (350) can be substantially equal to the width (W2) of the first teeth (320) such that the first and second teeth (320, 350) can be circumferentially coextensive when radially aligned with one another. In this manner, similar to the first teeth (320), the second teeth (350) can be configured to selectively mate or threadingly engage with the ribs (128b) to translate rotation of the depth limiter (300) relative to the cannula conduit (124b) into a relatively fine axial adjustment of the depth limiter (300) relative to the cannula conduit (124b) and can be further configured to selectively slidably engage the flats (170b) to allow a relatively coarse or rapid axial adjustment of the depth limiter (200) relative to the cannula conduit (124a). In one example, the teeth (320, 350) can be axially spaced apart from one another a distance corresponding to the axial spacing between the ribs (128b) such that the teeth (320, 350) can be capable of simultaneously threadingly engaging the ribs (128b).

[0115] More particularly, and as Figure 10AAs shown, when the depth limiter (300) is in a fine-tuning configuration, at least one of the first or second teeth (320, 350) can be at least partially radially aligned with the rib (128b) and at least partially radially misaligned with the flat portion (170b), such that at least one tooth (320, 350) engages with the rib (128b) threadedly and slidably disengages from the flat portion (170b). For this purpose, the first and second body portions (302, 304) can be in a non-time-controlled configuration, such that the teeth (320, 350) are radially misaligned with each other, thereby allowing at least one tooth (350) to engage with the rib (128b) threadedly, while the other tooth (320) can disengage from the rib (128b) threadedly. The interaction between at least one tooth (320, 350) and the rib (128b) can be configured to limit the axial movement of the depth limiter (300) relative to the cannula (124b) and / or allow fine axial movement of the depth limiter (300) relative to the cannula (124b), such as by constraining the depth limiter (300) to a rotatable helical movement relative to the cannula (124b).

[0116] like Figure 10B As shown, when the depth limiter (300) is in the quick-adjustment configuration, both teeth (320, 350) can be radially aligned with and substantially parallel to the flat portion (170b), and radially misaligned with the rib (128b), such that both teeth (320, 350) can slidably engage with the flat portion (170b) and can be threadedly disengaged from the rib (128b). For this purpose, the first body portion and the second body portion (302, 304) can be in a time-controlled configuration, wherein the teeth (320, 350) are radially aligned with each other, thereby allowing the two teeth (320, 350) to slidably engage with the flat portion (170b). The interaction between the two teeth (320, 350) and the flat portion (170b) can be configured to allow rapid axial movement of the depth limiter (300) relative to the cannula (124b), such as by allowing the depth limiter (300) to translate relative to the cannula (124b).

[0117] In one example, the widths (W2, W3) of the teeth (320, 350) can be dimensioned relative to one another and relative to the width (Wl) of the flat portion (170b) such that at least one tooth (320, 350) is configured to threadably engage the ribs (128b) and to slidably disengage the flat portion (170b) when the first and second body portions (302, 304) are in the at least one non-time-controlled configuration in which the teeth (320, 350) are radially misaligned with one another. For example, the widths (W2, W3) of the teeth (320, 350) can be dimensioned such that, when the teeth (320, 350) are radially misaligned with one another, the teeth (320, 350) collectively occupy a circumferential envelope having an effective or cumulative width that is greater than the width (Wl) of the flat portion (170b). In this manner, placement of the first and second body portions (302, 304) in the non-time-controlled configuration can correspond to placement of the depth limiter (300) in the fine adjustment configuration. In other words, the depth limiter (300) can be inhibited from being placed in the rapid adjustment configuration when the first and second body portions (302, 304) are in the non-time-controlled configuration. Thus, placement of the first and second body portions (302, 304) in the non-time-controlled configuration can inhibit the depth limiter (300) from inadvertently transitioning from the fine adjustment configuration to the rapid adjustment configuration, thereby inhibiting sudden translation of the depth limiter (300) relative to the cannula conduit (124b) during helical movement of the depth limiter (300) relative to the cannula conduit (124b), such as by preventing the teeth (320, 350) from inadvertently sliding axially along the flat portion (170b), or "skipping" the ribs (128b), as the teeth orbit around the flat portion between the ribs.

[0118] The widths (W2, W3) of the teeth (320, 350) can also be dimensioned relative to one another and relative to the width (W1) of the flat (170b) such that both teeth (320, 350) are configured to slidably engage with the flat (170b) when the first and second body portions (302, 304) are in the timed configuration with the teeth (320, 350) radially aligned with one another. For example, the widths (W2, W3) of the teeth (320, 350) can be equal to one another as described above. Likewise, the heights (H2, H3) of the teeth (320, 350) can be equal to one another as described above such that the teeth (320, 350) can axially overlap one another and thereby occupy a circumferential wrap having a width no greater than one or both of the widths (W2, W3) of the teeth (320, 350) and thus less than the width (W1) of the flat (170b) when the teeth (320, 350) are radially aligned with one another. In this manner, placement of the first and second body portions (302, 304) in the timed configuration can allow for placement of the depth limiter (300) in the quick adjustment configuration.

[0119] In one example, the first and second body portions (302, 304) can be biased relative to one another toward the untimed configuration such that the teeth (320, 350) are naturally radially misaligned with one another. In this regard, the depth limiter (300) can include a resilient biasing member such as a torsion spring (not shown) positioned between the first and second body portions (302, 304) and configured to bias the first and second body portions (302, 304) toward the untimed configuration. Alternatively, the first and second body portions (302, 304) can include cam surfaces (not shown) configured to bias the first and second body portions (302, 304) toward the untimed configuration. In any case, such biasing of the first and second portions (302, 304) can help inhibit inadvertent transitioning of the depth limiter (300) from the fine adjustment configuration to the quick adjustment configuration by effectively biasing the biased depth limiter (300) toward the fine adjustment configuration.

[0120] The finger grips (330, 360) can be configured to provide the user with visual and / or tactile indications of the positions on the body portions (302, 304) to be gripped in order to effectively and ergonomically rotate the body portions (302, 304) relative to each other between the timed configuration and the untimed configuration and / or collectively between the rapid adjustment configuration and the fine adjustment configuration in addition to providing the user with visual and / or tactile indications of the positions on the body portions (302, 304) to be gripped in order to effectively and ergonomically translate the depth limiter (300) relative to the cannula tubing (124b) when in the rapid adjustment configuration and / or to effectively and ergonomically spiral the depth limiter (300) relative to the cannula tubing (124b) when in the fine adjustment configuration in addition to providing the user with visual and / or tactile indications of the positions on the body portions (302, 304) to be gripped in order to make the depth limiter (300) effective and ergonomic relative to the cannula tubing (124b) of the trocar (110).

[0121] During operation, and with continued reference to Figure 10A and Figure 10B , the depth limiter (300) can initially be positioned around the cannula tubing (124b) of the trocar (110) such that the cannula tubing (124b) is received within the aperture (314) prior to deployment of the trocar (110) into the abdominal cavity (1) of the patient. During deployment of the trocar (110) into the abdominal cavity (1), the body portions (302, 304) can be in the rapid adjustment configuration or the fine adjustment configuration and / or in the timed configuration or the untimed configuration, as desired.

[0122] In some cases, the clinician can desire to allow for rapid axial movement of the depth limiter (300) relative to the cannula tubing (124b) of the trocar (110) during deployment. Accordingly, the clinician can choose to maintain the body portions (302, 304) in both the timed configuration and the rapid adjustment configuration. By maintaining the body portions (302, 304) in both the timed configuration and the rapid adjustment configuration, the two teeth (320, 350) can be unconstrained by the rib (128b). More specifically, the two teeth (320, 350) can be radially aligned with the flat (170b) to allow for translation of the depth limiter (300) relative to the cannula tubing (124b) of the trocar (110), as Figure 10B shown.

[0123] In other instances, the clinician can desire to limit axial movement of the depth limiter (300) relative to the cannulation conduit (124b) of the trocar (110) during deployment. For example, the clinician can desire to position the depth limiter (300) along the cannulation conduit (124b) at a predetermined axial position corresponding to a desired insertion depth of the cannula (120b) within the cavity (1). Accordingly, the clinician can select to rotate the at least one body portion (302, 304) relative to the cannulation conduit (124b) from the quick adjustment configuration toward the fine adjustment configuration. To do so, the clinician can manipulate the depth limiter (300), such as via the finger grips (330, 360), to effectively and ergonomically rotate the at least one body portion (302, 304) toward the fine adjustment configuration. In one example, such manipulation can include rotating the body portions (302, 304) relative to one another to the untimed configuration. By rotating the at least one body portion (302, 304) toward the fine adjustment configuration, the at least one tooth (320, 350) can be constrained for helical movement by the rib (128b). More specifically, the at least one tooth (320, 350) can be at least partially radially aligned with the rib (128b) to allow substantially only helical movement of the depth limiter (300) relative to the cannulation conduit (124b), as shown. Figure 10A Once the depth limiter (300) is at the predetermined axial position, the clinician can release the depth limiter (300) while still in the fine adjustment configuration, thereby allowing the threaded engagement between the at least one tooth (320, 350) and the rib (128b) to retain the depth limiter (300) at the predetermined axial position. In one example, the bias of the first and second body portions (302, 304) toward the untimed configuration can assist in retaining the depth limiter in the fine adjustment configuration upon release by the clinician.

[0124] With the depth limiter (300) positioned about the cannulation conduit (124b) in the axially limited or unrestricted state, the clinician can deploy the trocar (110) into the abdominal cavity (1) of the patient, as described above with respect to Figure 3A and Figure 3BThe depth limiter (300) can be secured to the cannula tubing (124b) during deployment of the depth limiter at a predetermined axial location along the cannula tubing (124b) that corresponds to the desired insertion depth of the cannula (120b) within the cavity (1). Contact between the distal hub (310) of the depth limiter (300) and the abdominal wall (2) can provide the clinician with a visual and / or tactile indication that the cannula (120b) has reached the desired insertion depth in the cavity (1) in this manner, the depth limiter (300) can help prevent the distal tip (154) of the obturator (116) and / or the cannula tip (not shown) of the cannula assembly (112) from inadvertently approaching a location deeper than desired in the abdominal cavity (1) during deployment. In other cases, the depth limiter (300) can be secured to the cannula tubing (124b) after the cannula (120b) is positioned at the desired insertion depth in the cavity (1).

[0125] In some cases, it can be desirable to quickly adjust the axial position of the depth limiter (300) along the cannula tubing (124b) after the depth limiter (300) has been secured to the cannula tubing (124b). Accordingly, the clinician can selectively manipulate the depth limiter (300) to rotate the body portions (302, 304) relative to one another from the non-timed configuration to the timed configuration, and relative to the cannula tubing (124b) from the fine adjustment configuration to the quick adjustment configuration, and subsequently translate the body portions (302, 304) relative to the cannula tubing (124b) to a new axial position. Once the depth limiter (300) is in the new axial position, the clinician can selectively manipulate the depth limiter (300) to rotate the body portions (302, 304) relative to the cannula tubing (124b) from the quick adjustment configuration to the fine adjustment configuration, which can include rotating the body portions (302, 304) relative to one another from the timed configuration to the non-timed configuration, and subsequently release the depth limiter (300) while in the fine adjustment configuration, thereby allowing the threadable engagement between the at least one tooth (320, 350) and the rib (128b) to retain the depth limiter (300) in the new axial position. In one example, the bias of the first and second body portions (302, 304) toward the non-timed configuration can automatically transition the depth limiter from the quick adjustment configuration to the fine adjustment configuration upon release of the depth limiter (300) by the clinician.

[0126] Likewise, it can be desirable to fine-tune the axial position of the depth limiter (300) along the cannula conduit (124b) after the depth limiter (300) has been secured to the cannula conduit (124b). Thus, with the depth limiter (300) in the fine-tune configuration, this can include having the first and second body portions (302, 304) in the untimed configuration, and the clinician can helically move the body portions (302, 304) relative to the cannula conduit (124b) to fine-tune the axial position of the depth limiter (300) relative to the cannula conduit (124b). During such movement, the body portions (302, 304) can be in the untimed configuration to inhibit the depth limiter (300) from being briefly placed in the quick-adjust configuration, and thus prevent the teeth (320, 350) from inadvertently sliding axially along the flat (170b) or "jumping" over the ribs (128b), and thereby prevent the depth limiter (300) from suddenly translating relative to the cannula conduit (124b), at least when one or both of the teeth (320, 350) are orbiting about the flat (170b). Once the depth limiter (300) is in a fine-tuned axial position, the clinician can release the depth limiter (300) while in the fine-tune configuration, which can include having the first and second body portions (302, 304) in the untimed configuration, thereby allowing the threaded engagement between at least one of the teeth (320, 350) and the ribs (128b) to retain the depth limiter (300) in the fine-tuned axial position. In one example, the bias of the first and second body portions (302, 304) toward the untimed configuration can assist in retaining the depth limiter in the fine-tune configuration when the clinician releases the depth limiter (300).

[0127] Thus, the clinician can adjust the axial position of the depth limiter (300) along the cannula conduit (124b), and subsequently can re-secure the depth limiter (300) to the cannula conduit (124b) by releasing the depth limiter (300) while in the fine-tune configuration and / or the untimed configuration.

[0128] During performance of a laparoscopic surgical procedure, the depth limiter (300) can remain securely coupled to the cannula conduit (124b) with the distal hub (310) of the depth limiter (300) seated against the abdominal wall (2). In this manner, the depth limiter (300) can assist in preventing the cannula tip (not shown) of the cannula assembly (112) from inadvertently accessing a location in the abdominal cavity (1) that is deeper than desired during performance of the laparoscopic surgical procedure.

[0129] Upon completion of a laparoscopic surgical procedure, the depth limiter (300) can be withdrawn proximally from the abdominal wall (2) along with the cannula assembly (112). The depth limiter (300) can be quickly removed from the cannula tube (124b) by rotating the body portions (302, 304) relative to one another toward the timed configuration as described above and toward the quick adjustment configuration relative to the cannula tube (124b) and subsequently translating the depth limiter (300) distally relative to the cannula tube (124b). In one example, the depth limiter (300) can be simply disposed of upon completion of a single laparoscopic surgical procedure.

[0130] C. Exemplary depth limiter with two stabilizing thread turning teeth

[0131] In some cases, it can be desirable to provide a cannula depth limiter having improved stability and reduced rotation relative to the cannula tube to transition the depth limiter to the quick adjustment configuration.

[0132] Figure 11 Another alternative cannula (120c) for a trocar (110) is shown having an elongate cylindrical tube (124c) that terminates at a cannula tip (126c) and includes a plurality of tissue gripping features in the form of helical ribs (128c). The cannula tube (124c) is substantially similar to the cannula tube (124a), except that the cannula tube (124c) includes a pair of tracks in the form of diametrically opposed flats (170c).

[0133] Figure 11 A third example depth limiter (400) is also shown that is selectively coupled to the cannula tube (124c) of a trocar (110) for selectively limiting the depth to which the trocar (110) can be advanced distally into an abdominal wall (2). The depth limiter (400) is substantially similar to the depth limiter (200) and includes various similar features. Accordingly, only the different features are described below.

[0134] The depth limiter (400) of the present version includes a body portion (402) that includes a distal cylindrical hub (410) and a proximal generally annular flange (212) extending radially outwardly from the distal cylindrical hub. The hub (410) defines a generally cylindrical bore (414) and is substantially similar to the hub (210), except that the hub (410) includes a pair of diametrically opposed flats (420) extending radially inwardly from a peripheral edge of the bore (414) and configured to selectively threadably engage the ribs (128c) of the cannula tube (124c) and selectively slidably engage the flats (170c) of the cannula tube (124c).

[0135] By providing pairs of flats (170c) and teeth (420), the cannula tube (124c) and the depth limiter (400) can cooperate to provide improved stability of the depth limiter (400) relative to the cannula tube (124c), and to provide reduced degrees of relative rotation between the depth limiter (400) and the cannula tube (124c) for transitioning the depth limiter (400) from the fine adjustment configuration to the illustrated quick adjustment configuration.

[0136] D. Exemplary depth limiter with three stabilizing thread turning teeth

[0137] In some cases, it can be desirable to provide a cannula depth limiter having further improved stability and further reduced degrees of rotation relative to a cannula tube for transitioning the depth limiter to a quick adjustment configuration.

[0138] Figure 12 Another alternative cannula (120d) for a trocar (110) is illustrated having an elongate cylindrical tube (124d) that terminates at a cannula tip (126d) and includes a plurality of tissue gripping features in the form of helical ribs (128d). The cannula tube (124d) is generally similar to the cannula tube (124a), except that the cannula tube (124d) includes a track in the form of three flats (170d) that are arranged equi-spaced circumferentially.

[0139] Figure 12 A fourth example depth limiter (500) is also illustrated that is selectively coupled to the cannula tube (124d) of a trocar (110) for selectively limiting a depth to which the trocar (110) can be advanced distally into an abdominal wall (2). The depth limiter (500) is substantially similar to the depth limiter (200) and includes various similar features. Accordingly, only the different features are described below.

[0140] The depth limiter (500) of the present version includes a body portion (502) that includes a distal cylindrical hub (510) and a proximal generally annular flange (212) extending radially outwardly from the distal cylindrical hub. The hub (510) defines a generally cylindrical bore (514) and is generally similar to the hub (210), except that the hub (510) includes three flats (520) that are arranged equi-spaced circumferentially and extend radially inwardly from a peripheral edge of the bore (514) and are configured to selectively threadably engage the ribs (128d) of the cannula tube (124d) and selectively slidably engage the plurality of flats (170d) of the cannula tube (124d).

[0141] By providing three sets of flats (170d) and teeth (520), the cannula tube (124d) and the depth limiter (500) can cooperate to provide further improved stability of the depth limiter (500) relative to the cannula tube (124d), and to provide further reduced relative rotation between the depth limiter (500) and the cannula tube (124d) for transitioning the depth limiter (500) from the fine adjustment configuration to the illustrated quick adjustment configuration.

[0142] It should be appreciated that any suitable number of flats (170a, 170b, 170c, 170d) and teeth (220, 320, 350, 420, 520) can be provided to allow the teeth (220, 320, 350, 420, 520) to selectively threadably engage the ribs (128a, 128b, 128c, 128d) of the cannula tube (124a, 124b, 124c, 124d) and selectively slidingly engage the flats (170a, 170b, 170c, 170d) of the cannula tube (124a, 124b, 124c, 124d). For example, the flats (170a, 170b, 170c, 170d) and the teeth (220, 320, 350, 420, 520) can be provided in a 3:3, 3:1, 2:2, 2:1, or 1:1 ratio or in any other suitable ratio.

[0143] E. Exemplary thread depth limiter with living hinge

[0144] In some cases, it can be desirable to provide a cannula depth limiter having a quick adjustment configuration that is different from the quick adjustment configurations of the depth limiters (200, 300, 400, 500) described above.

[0145] Figure 13An alternative trocar (120e) for a trocar needle (110) is shown having a bell-shaped hub (122e) at a proximal end of the trocar and an elongate cylindrical tube (124e) extending distally from the hub (122e) and terminating at a trocar tip (126e). An outer surface of the trocar tube (124e) includes at least one tissue gripping feature in the form of helical ribs (128e) extending around a middle portion of the trocar tube (124e). The ribs (128e) are configured to grip abdominal wall tissue layers through which the trocar (120e) is inserted and thereby assist in stabilizing the trocar (120e) in both axial and radial directions when the trocar (120e) is positioned within an opening formed in a patient's abdominal wall (2). The outer surface of the trocar tube (124e) also includes supplemental helical ribs (129e) extending around a proximal portion of the trocar tube (124e) and configured to be similar to the ribs (128e) for the purposes described below. The trocar (120e) of the present example can be suitably constructed from a strong material such as surgical steel so that the trocar (120e) can be sterilized and reused for multiple surgical procedures similar to the trocar (120) and the obturator (116) described above.

[0146] Figure 13 A fifth example depth limiter (600) is also shown that is selectively coupled to the trocar tube (124e) of the trocar needle (110). As described in greater detail below, the depth limiter (600) can selectively limit the depth to which the trocar needle (110) can be advanced into the abdominal wall (2).

[0147] As Figures 14-15B Best shown, the depth limiter (600) includes first and second body portions (602, 604) that are pivotably coupled to one another by first and second hinges (606, 608) so that the first and second body portions (602, 604) can be pivoted relative to one another between at least one fine adjustment configuration (e.g., as shown in FIG. 6A) and at least one quick adjustment configuration (e.g., as shown in FIG. 6B). Figure 15A Figure 15B ​pivot between. In the illustrated example, the first and second body portions (602, 604) and the first and second hinges (606, 608) are integrally formed together as a unitary piece. For example, the first and second body portions (602, 604) and the first and second hinges (606, 608) can be molded together as a single component, such as from a polymeric material including one or more plastics. Such a construction can allow the depth limiter (600) to be considered a disposable unit, intended to be separated from the cannula (120e) and replaced after each procedure. For example, such a construction can allow the depth limiter (600) to be easily manufactured and sold at a price point that makes the depth limiter (600) suitable for disposal after a single use, similar to the needle (10) and seal assembly (130) described above. In other versions, one or more portions of the depth limiter (600) can be formed from surgical steel or other materials suitable to make the depth limiter sterilizable and reusable for multiple surgical procedures. In any case, the illustrated first and second hinges (606, 608) include thinned portions of the same material as the first and second body portions (602, 604) such that the first and second body portions (602, 604) are allowed to bend about them, such that the first and second hinges (606, 608) can be considered "living" hinges.

[0148] In the illustrated example, the depth limiter (600) has a generally hollow frustoconical profile. To this end, the first and second body portions (602, 604) include first and second generally C-shaped proximal walls (610, 612), first and second generally C-shaped distal walls (614, 616), and first and second generally C-shaped intermediate walls (620, 622), respectively. As shown, the first and second proximal walls (610, 612) are positioned relatively radially outward, the first and second distal walls (614, 616) are positioned relatively radially inward, and the first and second intermediate walls (620, 622) taper radially inward in a distal direction from the first and second proximal walls (610, 612) to the first and second distal walls (614, 616), respectively. The first and second hinges (206, 208) are positioned between the lateral ends of the first and second body portions (602, 604) at respective interfaces of the first and second intermediate walls (620, 622) to collectively define a hinge axis that is perpendicular to a central axis (C) of the depth limiter (600) such that the first and second proximal walls (610, 612) are configured to pivot toward one another about the first and second hinges (206, 208) and such that the first and second distal walls (614, 616) are configured to pivot away from one another about the first and second hinges (206, 208) when the first and second body portions (602, 604) are in the quick adjustment configuration. In this manner, the first and second body portions (602, 604) collectively define a deformable, generally frustoconical bore (630) that extends longitudinally along the central axis (C) of the depth limiter (600) and that includes a generally cylindrical distal bore portion (632) that has a relatively constricted configuration when the first and second body portions (602, 604) are in the fine adjustment configuration and that has a relatively non-constricted configuration when the first and second body portions (602, 604) are in the quick adjustment configuration.

[0149] As Figure 15A and Figure 15BAs best shown, the first and second distal walls (614, 616) each include a first and second half-spiral clevis (640, 642) that extend radially inward from a peripheral edge of the distal aperture portion (632) and are configured to selectively threadably engage the ribs (128e) of the cannula conduit (124e). In this regard, the first and second clevises (640, 642) can collectively define a spiral path similar to that defined by the ribs (128e) such that the clevises (640, 642) can be capable of simultaneously threadably engaging the ribs (128e) at least when the first and second body portions (602, 604) are in the fine adjustment configuration. The illustrated first and second proximal walls (610, 612) include diametrically opposed first and second suture tie bars that can also be considered first and second finger grips (650, 652), respectively, each positioned generally centrally between the first and second hinges (606, 608) and positioned proximally relative thereto. The first and second finger grips (650, 652) are configured to provide a user with a visual and / or tactile indication of a position on the first and second body portions (602, 604) to be squeezed or pinched toward one another for effectively and ergonomically pivoting the first and second body portions (602, 604) relative to one another about the first and second hinges (606, 608) toward the rapid adjustment configuration, as described in greater detail below.

[0150] More particularly, and as Figure 15A shown, when the first and second body portions (602, 604) are in the fine adjustment configuration, the first and second distal walls (614, 616) can collectively form a first effective cross dimension that extends diametrically through the central axis (C) and is sized to position the first and second clevises (640, 642) at substantially the same radial distance from the central axis (C) as the ribs (128e) such that the first and second clevises (640, 642) are permitted to threadably engage the ribs (128e). The interaction between the clevises (640, 642) and the ribs (128e) can be configured to limit axial movement of the depth limiter (600) relative to the cannula conduit (124e) and / or permit fine axial movement of the depth limiter (600) relative to the cannula conduit (124e), such as by constraining the depth limiter (600) to rotatable, helical movement relative to the cannula conduit (124e).

[0151] As Figure 15BAs shown, the first and second distal walls (614, 616) can collectively form a second effective lateral dimension that extends diametrically across the central axis (C) and is sized to position the first and second clamping plates (640, 642) radially outward relative to the rib (128e) such that the first and second clamping plates (640, 642) are prevented from threadably engaging the rib (128e) when the first and second body portions (602, 604) are in the rapid adjustment configuration. Disengagement of the clamping plates (640, 642) from the rib (128e) can allow for rapid axial movement of the depth limiter (600) relative to the cannula conduit (124e), such as by allowing the depth limiter (600) to translate relative to the cannula conduit (124e).

[0152] The finger grips (650, 652) can be configured to provide the user with visual and / or tactile indications of locations on the first and second body portions (602, 604) to be grasped for effectively and ergonomically translating the depth limiter (600) relative to the cannula conduit (124e) when in the rapid adjustment configuration and / or for helically moving the depth limiter (600) relative to the cannula conduit (124e) when in the fine adjustment configuration, in addition to providing the user with visual and / or tactile indications of locations on the first and second body portions (602, 604) to be squeezed or pinched together for effectively and ergonomically pivoting the first and second body portions (602, 604) relative to one another about the first and second hinges (606, 608) toward the rapid adjustment configuration.

[0153] In some examples, the first and second body portions (602, 604) can be biased toward the fine adjustment configuration. For example, the first and second distal walls (614, 616) can be resiliently biased toward one another, and the first and second proximal walls (610, 612) can be resiliently biased away from one another, such as via torsion spring members (not shown) incorporated into the first and second hinges (606, 608) or external spring members (not shown) positioned directly between the first and second proximal walls (610, 612). In other examples, the first and second hinges (606, 608) can each be configured as living hinges shaped and dimensioned to exert opposing resilient biases on the first and second proximal walls (610, 612) at the lateral ends of the first and second proximal walls. In this way, the first and second body portions (602, 604) can be configured to automatically move from the rapid adjustment configuration toward the fine adjustment configuration in response to the absence of an external force applied to the first and second finger grips (650, 652).

[0154] In one example, the first and second clamping plates (640, 642) are configured to selectively threadably engage supplemental ribs (129e) of the cannula tubing (124e), such as for storing the depth limiter (600) along the cannula tubing (124e) proximate a proximal axial position of the hub (122e) prior to use.

[0155] During operation, and with continued reference to Figure 15A and Figure 15B , the depth limiter (600) is initially positionable about the cannula tubing (124e) of the trocar (110) such that the cannula tubing (124e) is received within the aperture (630) prior to deployment of the trocar (110) into the abdominal cavity (1) of the patient. During deployment of the trocar (110) into the abdominal cavity (1), the first and second body portions (602, 604) can be in either the quick adjustment configuration or the fine adjustment configuration, as desired.

[0156] In some instances, the clinician can desire to allow for quick axial movement of the depth limiter (600) relative to the cannula tubing (124e) of the trocar (110) during deployment. Accordingly, the clinician can elect to move the first and second body portions (602, 604) from the fine adjustment configuration toward the quick adjustment configuration. To do so, the clinician can squeeze or pinch the first and second finger grips (650, 652) toward one another via the clinician’s thumb and fingers, as indicated by the first and second arrows (Al, A2) in Figure 15B , respectively, to effectively and ergonomically move the first and second body portions (602, 604) toward the quick adjustment configuration. With the first and second body portions (602, 604) maintained in the quick adjustment configuration, the first and second clamping plates (640, 642) can be unconstrained by the ribs (128e). More specifically, the first and second clamping plates (640, 642) can be positioned radially outward relative to the ribs (128e) to allow for translation of the depth limiter (600) relative to the cannula tubing (124e) of the trocar (110), as shown in Figure 15B .

[0157] In other cases, the clinician can desire to limit axial movement of the depth limiter (600) relative to the cannulation conduit (124e) of the trocar (110) during deployment. For example, the clinician can desire to position the depth limiter (600) along the cannulation conduit (124e) at a predetermined axial position corresponding to a desired depth of insertion of the cannula (120e) within the cavity (1). Accordingly, the clinician can select to move the first and second body portions (602, 604) from the quick adjustment configuration toward the fine adjustment configuration. In one example, the bias of the first and second body portions (602, 604) toward the fine adjustment configuration can facilitate such movement. By moving the first and second body portions (602, 604) toward the fine adjustment configuration, the first and second clamping plates (640, 642) can be constrained by the ribs (128e) to move helically. More specifically, the first and second clamping plates (640, 642) can be positioned at substantially the same radial distance from the central axis (C) as the ribs (128e) to allow substantially only helical movement of the depth limiter (600) relative to the cannulation conduit (124e), as shown. Figure 15A Once the depth limiter (600) is at the predetermined axial position, the clinician can release the depth limiter (600) while still in the fine adjustment configuration, allowing the threaded engagement between the clamping plates (640, 642) and the ribs (128e) to retain the depth limiter (600) at the predetermined axial position.

[0158] With the depth limiter (600) positioned around the cannulation conduit (124e) in the axially limited or unlimited state, the clinician can deploy the trocar (110) into the abdominal cavity (1) of the patient, as described above with respect to Figure 3A and Figure 3B to position the cannula (120e) at a desired depth of insertion within the cavity (1). With the depth limiter (600) secured to the cannulation conduit (124e) during deployment at a predetermined axial position along the cannulation conduit (124e) corresponding to the desired depth of insertion of the cannula (120e) within the cavity (1), contact between the distal walls (614, 616) of the depth limiter (600) and the abdominal wall (2) can provide a visual and / or tactile indication to the clinician that the cannula (120e) has reached the desired depth of insertion within the cavity (1). In this manner, the depth limiter (600) can help prevent the distal tip (154) of the obturator (116) and / or the cannula tip (126e) of the cannula assembly (112) from inadvertently accessing a location deeper than desired within the abdominal cavity (1) during deployment. In other cases, the depth limiter (600) can be secured to the cannulation conduit (124e) after the cannula (120e) is positioned at the desired depth of insertion within the cavity (1).

[0159] In some cases, it can be desirable to quickly adjust the axial position of the depth limiter (600) along the cannula conduit (124e) after the depth limiter (600) has been secured to the cannula conduit (124e). Thus, the clinician can selectively manipulate the depth limiter (600) to pivot the body portions (602, 604) relative to one another from the fine adjustment configuration to the quick adjustment configuration, and then can translate the body portions (602, 604) relative to the cannula conduit (124e) to a new axial position. Once the depth limiter (600) is in the new axial position, the clinician can selectively manipulate the depth limiter (600) to pivot the body portions (602, 604) relative to one another from the quick adjustment configuration to the fine adjustment configuration, and then release the depth limiter (300) while in the fine adjustment configuration, thereby allowing the threaded engagement between the clamping plates (640, 642) and the ribs (128e) to retain the depth limiter (600) in the new axial position. In one example, the bias of the first and second body portions (602, 604) toward the fine adjustment configuration can automatically transition the depth limiter from the quick adjustment configuration to the fine adjustment configuration upon the clinician releasing the depth limiter (600).

[0160] Likewise, it can be desirable to finely adjust the axial position of the depth limiter (600) along the cannula conduit (124e) after the depth limiter (600) has been secured to the cannula conduit (124e). Thus, with the depth limiter (600) in the fine adjustment configuration, the clinician can helically move the body portions (602, 604) relative to the cannula conduit (124e) to fine tune the axial position of the depth limiter (600) relative to the cannula conduit (124e). Once the depth limiter (600) is in the fine tuned axial position, the clinician can release the depth limiter (600) while in the fine adjustment configuration, thereby allowing the threaded engagement between the clamping plates (640, 642) and the ribs (128e) to retain the depth limiter (600) in the fine tuned axial position. In one example, the bias of the first and second body portions (602, 604) toward the fine adjustment configuration can assist in retaining the depth limiter in the fine adjustment configuration upon the clinician releasing the depth limiter (600).

[0161] Thus, the clinician can adjust the axial position of the depth limiter (600) along the cannula conduit (124e), and then can re-secure the depth limiter (600) to the cannula conduit (124e) by releasing the depth limiter (600) while in the fine adjustment configuration.

[0162] During performance of a laparoscopic surgical procedure, the depth limiter (600) can remain securely coupled to the cannula tube (124e) with the distal walls (614, 616) of the depth limiter (600) seated against the abdominal wall (2). In this manner, the depth limiter (600) can help prevent the cannula tip (126e) of the cannula assembly (112) from inadvertently accessing the abdominal cavity (1) a location deeper than desired during performance of a laparoscopic surgical procedure.

[0163] Upon completion of a laparoscopic surgical procedure, the depth limiter (600) can be withdrawn proximally from the abdominal wall (2) along with the cannula assembly (112). The depth limiter (600) can be quickly removed from the cannula tube (124e) by pivoting the body portions (602, 604) relative to one another toward the quick adjustment configuration as described above and then translating the depth limiter (600) distally relative to the cannula tube (124e). In one example, the depth limiter (600) can be simply disposed after completion of a single laparoscopic surgical procedure.

[0164] F. Exemplary depth limiter and cannula tube with half- support stabilizing threads

[0165] In some cases, it can be desirable to provide a cannula depth limiter having reduced rotationality relative to the cannula tube for adjusting the axial position of the depth limiter when in the fine adjustment configuration and having a retention force greater than the insertion force applied to the depth limiter by the cannula tube.

[0166] Figure 16 and Figure 17 Another alternative cannula tube (124f) for a trocar (110) is shown, which terminates at a cannula tip (126f) and includes a plurality of tissue gripping features in the form of helical ribs (128f). The cannula tube (124f) is generally similar to the cannula tube (124a), except that the cannula tube (124f) includes a plurality of tracks in the form of a pair of diametrically opposed channels (170f) (one shown), with a depth identification marker (172f) disposed on the pair of channels and configured to provide a visual indication of, for example, the depth of insertion of the cannula tube (124f) relative to the cavity (1). The channels (170f) function substantially similar to the flats (170a, 170b, 170c, 170d) discussed above. In addition, the ribs (128f) have a double-headed configuration such that alternate ribs (128f) are offset 180 degrees from one another and spaced one-half pitch apart from one another. As Figure 17 Each rib (128f) has a half-branch support configuration, as best shown in

[0167] Figure 16 and Figure 17A sixth example depth limiter (700) is also shown that is selectively coupled to the cannula tubing (124f) of the trocar (110) for selectively limiting the depth that the trocar (110) can be advanced distally into the abdominal wall (2). The depth limiter (700) is substantially similar to the depth limiter (200) and includes various similar features. Accordingly, only the different features are described below.

[0168] The depth limiter (700) of the present version includes a cylindrical hub (710) that defines a generally cylindrical bore (714) and includes a plurality of teeth (720) that extend radially inward from the peripheral edge of the bore (714) and are configured to selectively threadably engage the alternating ribs (128f) of the cannula tubing (124f) and selectively slidingly engage the channels (170f) of the cannula tubing (124f).

[0169] By providing a pair of channels (170f) and a plurality of teeth (720), the cannula tubing (124f) and the depth limiter (700) can cooperate to provide improved stability of the depth limiter (700) relative to the cannula tubing (124f) and to provide reduced relative rotation between the depth limiter (700) and the cannula tubing (124f) for transitioning the depth limiter (700) from the fine adjustment configuration shown to the quick adjustment configuration. By providing ribs (128f) having a double-headed configuration and teeth (720) that are configured to threadably engage the alternating ribs (128f), the cannula tubing (124f) and the depth limiter (700) can cooperate to provide reduced relative rotation between the depth limiter (700) and the cannula tubing (124f) for adjusting the axial position of the depth limiter (700) when in the fine adjustment configuration (e.g., increased axial adjustment per rotation). And, by providing ribs (128f) having a half- crutch configuration, the cannula tubing (124f) can exert a greater retention force on the depth limiter (700) than the insertion force.

[0170] G. Exemplary depth limiter and cannula tube with multiple offset stabilizing threads

[0171] In some cases, it can be desirable to provide a cannula depth limiter that has further reduced rotation relative to the cannula tubing for adjusting the axial position of the depth limiter and that has a retention mechanism for preventing the depth limiter from inadvertently disengaging from the cannula tubing.

[0172] Figure 18Another alternative cannula tube (124g) for a trocar (110) is shown terminating at a cannula tip (126g). The cannula tube (124g) is generally similar to the cannula tube (124a), except that the cannula tube (124g) omits the flat and includes a plurality of tissue gripping features in the form of four helical ribs (128g) that are offset 90 degrees from one another and spaced one quarter pitch apart. In addition, the cannula tube (124g) includes four insertion ramps (131g) that taper radially inward in the distal direction from the major exterior lateral of the ribs (128g) and are spaced apart from one another by respective notches (133g). Each notch (133g) is generally radially aligned with the distal starting point of the corresponding rib (128g).

[0173] Figure 18 A seventh example depth limiter (800) is also shown selectively coupled to the cannula tube (124g) of a trocar (110) for selectively limiting the depth to which the trocar (110) can be advanced distally into the abdominal wall (2). The depth limiter (800) is substantially similar to the depth limiter (200) and includes various similar features. Accordingly, only the different features are described below.

[0174] As Figure 17 The depth limiter (800) of this version includes a cylindrical hub (810) that defines a generally cylindrical bore (814) and includes four sets (two sets shown) of four radially aligned teeth (820) that extend radially inward from the peripheral edge of the bore (814) and are configured to selectively threadably engage the corresponding ribs (128g) of the cannula tube (124g). The sets of teeth (820) are offset 90 degrees from one another and have a pitch that is equal to one quarter of the pitch of the ribs (128g). The teeth (820) are each sized to be slidably received by the respective notches (133g).

[0175] By providing four ribs (128g) and four sets of teeth (820) configured to threadably engage the respective ribs (128g), the cannula tube (124g) and the depth limiter (800) can cooperate to provide further reduced degree of relative rotation between the depth limiter (800) and the cannula tube (124g) for adjusting the axial position of the depth limiter (800) (e.g., incremental axial adjustment per rotation). Also, by providing a ramp (131g) and a notch (133g), the cannula tube (124g) can cooperate with the depth limiter (800) to allow intentional assembly and intentional disassembly of the depth limiter (800) onto and from the cannula tube (124g) by passing the teeth (820) through the notch (133g), while preventing unintentional disengagement of the depth limiter (800) from the cannula tube (124g).

[0176] H. Exemplary depth limiter with stabilizing thread turning tabs

[0177] In some cases, it can be desirable to provide a cannula depth limiter having a reduced degree of rotation relative to a cannula tube for adjusting the axial position of the depth limiter, and having improved operability.

[0178] Figure 20 Another alternative cannula tube (124h) for a trocar (110) is shown, which terminates at a cannula tip (126h). The cannula tube (124h) is generally similar to the cannula tube (124a), except that the cannula tube (124h) omits the flat and includes a plurality of tissue gripping features in the form of two helical ribs (128h) that are offset 180 degrees from each other and spaced one-half pitch apart from each other. In one example, the ribs (128h) can be hydroformed on the cannula tube (124h). It should be appreciated that the ribs (128h) can be formed on the cannula tube (124h) in any other suitable manner, such as machining or molding. Likewise, the cannula tube (124h) can be hydroformed or manufactured in any other suitable manner, such as by first stretching a flat sheet and then welding the flat sheet to itself into a cylindrical configuration.

[0179] Figure 20 An eighth example depth limiter (900) is also shown, which is selectively coupled to the cannula tube (124h) of a trocar (110) for selectively limiting the depth to which the trocar (110) can travel distally into an abdominal wall (2). The depth limiter (900) is substantially similar to the depth limiter (200) and includes various similar features. Accordingly, only the different features are described below.

[0180] As Figure 21As best shown, the depth limiter (900) of this version includes an x-shaped hub (910) that defines a generally cylindrical bore (914) and includes a pair of diametrically opposed tabs (920) that extend radially inward from a peripheral edge of the bore (914) and are configured to selectively threadably engage a plurality of ribs (128h) of the cannula tubing (124h).

[0181] By providing the pair of ribs (128h) and tabs (920), the cannula tubing (124h) and the depth limiter (900) can cooperate to provide improved stability of the depth limiter (900) relative to the cannula tubing (124h), and to provide reduced degrees of relative rotation between the depth limiter (900) and the cannula tubing (124h) for adjusting the axial position of the depth limiter (900) (e.g., incremental axial adjustment per rotation). And, by providing the x-shaped hub (910), the depth limiter (900) can provide improved operability.

[0182] I. Exemplary depth limiter and cannula tube with stabilizing ribs and depth limiter gripping threads

[0183] In some cases, it can be desirable to provide a cannula depth limiter having further reduced degrees of rotation relative to the cannula tubing for adjusting the axial position of the depth limiter, where such depth limiter is configured to engage a dedicated thread on the cannula tubing rather than a stabilizing rib of the cannula tubing.

[0184] Figure 22 Another alternative cannula tubing (124i) for a trocar (110) is shown, which terminates at a cannula tip (126i). The cannula tubing (124i) is generally similar to the cannula tubing (124a), except that the cannula tubing (124i) omits the flat and includes a plurality of tissue gripping features in the form of annular ribs (128i) that are arranged axially along the middle portion of the cannula tubing (124i) and are similar to the ribs (26, 128) described above. In addition, the cannula tubing (124i) includes four sets (three sets shown) of radially aligned helical threads (135i) that are arranged axially along the middle- proximal and proximal portions of the cannula tubing (124i) such that the threads (135i) partially overlap the ribs (128i). The sets of threads (135i) are offset 90 degrees from one another and are spaced apart by a quarter pitch.

[0185] Figure 22A ninth example depth limiter (1000) is also shown that is selectively coupled to the cannula tubing (124i) of the trocar (110) for selectively limiting the depth that the trocar (110) can travel distally into the abdominal wall (2). The depth limiter (1000) is substantially similar to the depth limiter (200) and includes various similar features. Accordingly, only the different features are described below.

[0186] As Figure 23 As best shown in FIG. 10, the depth limiter (1000) of this version includes a wing-nut shaped hub (1002) that defines a generally cylindrical bore (1004) and includes a helical thread (1006) that extends radially inward from a peripheral edge of the bore (914) and is configured to selectively threadably engage the threads (135i) of the cannula tubing (124i).

[0187] By providing four sets of threads (135i) and a helical thread (1006) that is configured to threadably engage the threads (135i) rather than the ribs (128i), the cannula tubing (124i) and the depth limiter (1000) can cooperate to provide further reduced degrees of relative rotation between the depth limiter (1000) and the cannula tubing (124i) for adjusting the axial position of the depth limiter (1000) (e.g., increased axial adjustment per rotation), and can provide a reduced degree of invasiveness to tissue caused by the threads (135i) while further allowing the threads (135i) to coincide with the ribs (128i).

[0188] J. Tenth exemplary depth limiter

[0189] Figure 24 A perspective view of a tenth example depth limiter (1010) is shown. The depth limiter (1010) includes a hub (1012) and a plurality of legs (1014). The depth limiter (1010) can be used in combination with the depth limiters (200, 300, 400, 500, 600, 700, 800, 900, 1000) described above. While the hub (1012) is shown as being generally square, other shapes of the hub (1012) are also contemplated. As shown, the hub (1012) includes a bore (1016) that extends completely therethrough. The bore (1016) can include a gripping surface (1018). The gripping surface (1018) can extend parallel to a longitudinal axis defined by the cannula tubing (22) of the cannula (20). While the Figures 24-25B The depth limiter (1010) is described with reference to the cannula tubing (22) of the trocar (10), but other cannula tubings (e.g., the cannula tubing (124)) can also be used. The gripping surface (1018) can be smooth or non-smooth. As Figure 1 The depth limiter (1010) is described with reference to the cannula tubing (22) of the trocar (10), but other cannula tubings (e.g., the cannula tubing (124)) can also be used. The gripping surface (1018) can be smooth or non-smooth. AsFigure 24 As shown, the gripping surface (1018) includes a smooth surface that can frictionally engage with a portion of the cannula (20), such as a rib (26) . Alternatively, the gripping surface (1018) may include a non-smooth surface that may include one or more features to lockably engage with the cannula conduit (22). In other words, the depth limiter (1010) may be secured to the cannula (20) using a mating thread (such as a nut) or a suitable amount of interference fit. Such threads of the depth limiter (1010) may be helical or non-helical (e.g., fan-shaped). For example, the gripping surface (1018) may include at least one tooth configured to lockably engage with at least one rib (26) of the cannula (20).

[0190] The legs (1014) may have a generally constant cross-sectional area that moves radially away from the hub (1012); however, the legs (1014) may have a non-uniform cross-section. For example, one or more ends of the legs (1014) may include cup-shaped portions (1020) to distribute downward forces. As shown, the legs (1014) are spaced approximately 90 degrees apart. More or fewer legs (1014) are also conceivable.

[0191] A depth limiter (1010) provides additional stability to the cannula (10) against tilting. The depth limiter (1010) may be configured to use legs (1014) to limit sudden tilting, thereby stabilizing the cannula (20). The depth limiter (1010) is configured to prevent accidental over-insertion while also limiting the displacement and / or velocity of the cannula (10) to stabilize it. This stabilization may be achieved using the mechanical spring effect of each leg (1014). The legs (1014) may have reduced mass, allowing them to flex outward, resulting in a variable spring resistance in each direction in which the cannula (10) attempts to tilt. For example, the legs (1014) may have a reduced mass portion (e.g., a movable hinge portion) and / or may rely on the inherent spring force of the legs (1014). The leg (1014) may contact the patient’s body wall to prevent or at least slow the tilting of the cannula (20).

[0192] Figures 25A-25B The depth limiter (1010) is shown; however, Figures 25A-25B The teaching content can also be applied to the depth limiters (1110, 1210) described in detail below. Figure 25A It shows the relationship with Figure 1 The cannula needle (10) is connected to the cannula assembly (12) and the cannula tube (22). Figure 24A partial side sectional view of the depth limiter (1010), wherein the leg (1014) of the depth limiter (1010) is in a non-deployed configuration when the distal end of the cannula (10) is received within the abdominal cavity (1). Figure 25A In the non-deployed configuration (e.g., the stationary configuration), the legs (1014) can bend downwards. As the depth limiter (1010) is pushed against the abdominal wall (2), the legs (1014) bend flatter, providing a reaction force against the abdominal wall (2) and the cannula (20). The degree to which the legs (1014) bend flatter can be controlled by the user. For example, an additional force (e.g., downward hand pressure from the user) may cause the legs (1014) to bend flatter until the depth limiter (1010) is positioned close to the abdominal wall (2). As the flatness of the legs (1014) increases, the amount of reaction force on the cannula (20) may also increase, which increases the locking force. For example, the legs (1014) may have a degree of deployment when the user has pressed the depth limiter (1010) into a partially (but not fully) deployed configuration. Additionally, if the user subsequently applies an off-axis load, one or more of the legs (1014) may press further than the other legs (1014), but when the off-axis load is removed, the legs (1014) can balance and return to their original centered position in a controlled manner.

[0193] Figure 25B The following is shown after the separation and removal of the packer (16) and... Figure 1 The cannulation assembly (12) is connected to the cannulation tube (22). Figure 24 A partial side cross-sectional view of the depth limiter (1010) is shown, wherein the legs (1014) of the depth limiter (1010) are in an extended configuration with the distal end of the cannula (22) received within the abdominal cavity (1). In the extended configuration, the legs (1014) reduce the amount of rotational displacement / tilting that the cannula (10) can achieve, and also reduce the speed at which the cannula (10) can achieve this tilting (i.e., preventing sudden, accidental movement within the body). To completely disengage the depth limiter (1010) from the cannula (22), the user can retract the cannula (20) outside the abdominal wall (2) to sufficiently reduce the compressive / clamping force of the depth limiter (1010) on the abdominal wall (2), allowing the user to pull the depth limiter (1010) back with their hands. The depth limiter (1010) can be disposable or reusable.

[0194] K. Eleventh exemplary depth limiter

[0195] Figure 26An eleventh exemplary depth limiter (1110) similar to a depth limiter (1010) is shown. The depth limiter (1110) includes a hub (1112) similar to a hub (1012), legs (1114) similar to legs (1014), holes (1116) similar to holes (1016), and gripping surfaces (1118) similar to gripping surfaces (1018). The legs (1114) may include cup-shaped portions (1120) similar to cup-shaped portions (1020). Unlike the depth limiter (1010) shown as including four legs (1014), the depth limiter (1110) includes two legs (1114). For example, the legs (1114) may be separated by approximately 180 degrees. The legs (1114) are similar to those in the reference above. Figures 25A-25B The legs (1014) are bent as shown.

[0196] L. Twelfth Exemplary Depth Limiter

[0197] FIG. 27 A twelfth exemplary depth limiter (1210) similar to depth limiters (1010, 1110) is shown. The depth limiter (1210) includes a hub (1212) similar to a hub (1012), legs (1214) similar to legs (1014), holes (1216) similar to holes (1016), and gripping surfaces (1218) similar to gripping surfaces (1018). The legs (1114) may include cup-shaped portions (1220) similar to cup-shaped portions (1020). Unlike the depth limiter (1010) shown as including four legs (1014), the depth limiter (1210) includes three legs (1214). For example, the legs (1214) may be evenly spaced about 120 degrees circumferentially around the hub (1212). However, the legs (1214) may be unevenly spaced. In some cases, using three or four legs (1014, 1214, 1314, 1414) allows for further stability and ergonomics to allow the user's (U) fingers to grasp. The legs (1214) can be similar to those referenced above. FIGS. 25A-25B The legs (1014) are bent as shown.

[0198] M. Thirteenth Exemplary Depth Limiter

[0199] FIGS. 28-30B A thirteenth exemplary depth limiter (1310) is shown. Specifically, FIG. 28A perspective view of the depth limiter (1310) is shown. As shown, the depth limiter (1310) includes a hub (1312) and a plurality of legs (1314) extending from the hub (1312). The depth limiter (1310) can be used in conjunction with any or more of the depth limiters (200, 300, 400, 500, 600, 700, 800, 900, 1000) described above. Although the hub (1312) is shown as generally cylindrical, other shapes of hubs (1312) are also conceivable. As shown, the hub (1312) includes a bore 1316 and a plurality of recesses 1318. The recesses (1318) allow the depth limiter (1310) to be converted from a movable configuration to a fixed configuration.

[0200] The aperture (1316) includes a gripping surface (1320) configured to engage with the outer surface of the cannula (124) in a fixed configuration. The gripping surface (1320) may extend parallel to the longitudinal axis defined by the cannula (124) of the cannula (120). Although FIGS. 28-30B The depth limiter (1310) is described with reference to the insertion cannula (124) of the cannula (110), but other insertion cannulas (e.g., insertion cannula (22)) may also be used. The gripping surface (1320) may be smooth or non-smooth. FIG. 28 As shown, the gripping surface (1320) may include a smooth surface that frictionally engages with the ribs (128) of the cannula (120) in a fixed configuration. Alternatively, the gripping surface (1320) may include a non-smooth surface that may include one or more features for locking engagement with the cannula conduit (124). The hub (1312) of the depth limiter (1310) may be secured to the cannula (120) using a mating thread (such as a nut) or an interference fit. The thread may be helical or non-helical (e.g., fan-shaped). For example, the gripping surface (1320) may include at least one tooth configured to lockably engage with at least one rib (128) of the cannula (120). For example, a notch (1318) may be formed in the hub (1312) of the depth limiter (1310) such that when sufficient force is applied to each leg (1314), the leg (1314) may selectively collapse, causing the gripping surface (1320) to clamp more tightly onto the cannula (120). Thus, the depth limiter (1310) can limit the insertion depth of the cannula channel (124) of the cannula (120) and provide stability control of the cannula channel (124) of the cannula (120).

[0201] The legs (1314) can have a generally tapered cross-section that moves radially away from the hub (1312). For example, one or more ends of the legs (1314) can include a distal end pad (1322) to distribute downward force. As shown, the legs (1314) are separated by approximately 90 degrees. The legs (1314) can be unevenly separated. Additionally, more or fewer legs (1314) can also be contemplated (similar to the legs associated with the depth limiter (1110, 1210) shown in FIGS. 1 1 1-1 12, 121 1-1212). FIGS. 26-27 The depth limiter (1310) can provide additional stability to the trocar (1 10) against tilting. The depth limiter (1310) can be configured to limit sudden tilting using the legs (1314), thereby stabilizing the cannula (120). The legs (1314) can contact the body wall to prevent or at least slow the tilting of the cannula (120).

[0202] FIG. 29A and FIG. 30A A depth limiter (1310) is shown in a movable configuration. Specifically, FIG. 29A A top plan view of the depth limiter (1310) of the trocar assembly (112) of FIG. 5 is shown coupled to the cannula tubing (124) of the trocar assembly (112) of FIG. 28 A top plan view of the depth limiter (1310) of the trocar assembly (112) of FIG. 30A is shown coupled to the cannula tubing (124) of the trocar assembly (112) of FIG. 5 A partial side cross-sectional view of the depth limiter (1310) of the trocar assembly (112) of FIG. 28 is shown in a movable configuration. In the movable configuration, the legs (1314) of the depth limiter (1310) are bent down. Once pushed against the abdominal wall (2), the legs (1314) bend more flat and provide a counter force against the abdominal wall (2) and the cannula (120). FIG. 29A and FIG. 30A A top plan view of the depth limiter (1310) of the trocar assembly (112) of

[0203] FIG. 29B and FIG. 30B A depth limiter (1310) is shown in a fixed configuration. Specifically, FIG. 29B A top plan view of the depth limiter (1310) of the trocar assembly (112) of FIG. 5 is shown coupled to the cannula tubing (124) of the trocar assembly (112) of FIG. 28a partial side cross-sectional view of a depth limiter (1310) in which the legs (1314) of the depth limiter (1310) are in a fixed configuration. In the fixed configuration, the notches (1318) can be forced closed to narrow the aperture (1316). The legs (1314) can reduce the amount of rotational displacement / tilt that the trocar (110) can exhibit, and can also reduce the speed at which the trocar (110) can provide tilt (i.e., prevent sudden movement in the body). In the fixed configuration, the gripping surfaces (1320) collectively form a first effective diameter (ED1) that limits axial movement of the depth limiter (1310) relative to the cannula (120) by directly contacting the cannula (120). The depth limiter (1310) can be disposable or reusable. FIG. 30B a cannula assembly (112) coupled to a cannula tube (124) of the cannula assembly (112) after separation and removal of the obturator (116). FIG. 5 a cannula assembly (112) coupled to a cannula tube (124) of the cannula assembly (112) after separation and removal of the obturator (116). FIG. 28 a partial side cross-sectional view of a depth limiter (1310) in which the legs (1314) of the depth limiter (1310) are in a fixed configuration. In the fixed configuration, the notches (1318) can be forced closed to narrow the aperture (1316). The legs (1314) can reduce the amount of rotational displacement / tilt that the trocar (110) can exhibit, and can also reduce the speed at which the trocar (110) can provide tilt (i.e., prevent sudden movement in the body). In the fixed configuration, the gripping surfaces (1320) collectively form a first effective diameter (ED1) that limits axial movement of the depth limiter (1310) relative to the cannula (120) by directly contacting the cannula (120). The depth limiter (1310) can be disposable or reusable.

[0204] N. Fourteenth Exemplary Depth Limiter

[0205] FIG. 31 a top cross-sectional view of a fourteenth example depth limiter (1410). The depth limiter (1410) includes a hub (1412) and a plurality of legs (1414) extending from the hub (1412). The depth limiter (1410) can be used in conjunction with any one or more of the depth limiters (200, 300, 400, 500, 600, 700, 800, 900, 1000) described above. In some versions, the hub (1412) can be generally cylindrical. As shown, the hub (1412) includes an aperture (1416) configured to receive a cannula tube (124) of a cannula (120). As shown, the legs (1414) can be separated by approximately 90 degrees. However, the legs (1414) can be unevenly separated. Additionally, more or fewer legs (1414) can also be contemplated, similar to the depth limiters (1110, 1210) shown in FIGS. 1 and 12. FIGS. 26-27 the depth limiters (1110, 1210) shown in FIGS. 1 and 12.

[0206] The depth limiter (1410) includes a fluid chamber (1418) that may be disposed within the hub (1412) and the leg (1414). For example, the fluid chamber (1418) may be completely surrounded by the hub (1412) and the leg (1414). The fluid chamber may include a plurality of fluid channels (1420) including a narrow portion (1422). The narrow portion (1422) may be generally disposed between the hub (1412) and the leg (1414). The narrow portion (1422) regulates the flow between the hub (1412) and the leg (1414). In other words, the fluid chamber (1418) may be integrated into the leg (1414), wherein the narrow portion (1422) forms a restricted flow region at the base of each leg (1414). As shown, one or more ends of the legs (1414) may include extensions (1424) configured to extend from a compression configuration (C) to an expansion configuration (E). A depth limiter (1410) provides additional stability to the cannula (110) against tilting. As additional tilting forces act on each individual leg (1414), fluid may be redistributed to the other legs (1414), but the fluid may be restricted by these confined areas (1422), thus creating a damping effect on the tilting of the cannula (110). This damping effect regulates the rate of tilting of the cannula (110). Therefore, the depth limiter (1410) can limit sudden tilting of the cannula (110) via confined fluid flow between the legs (1414), thereby stabilizing the insertion (120).

[0207] The orifice (1416) includes a gripping surface (1426) that can engage with the outer surface of the cannula (124) of the cannula (120). The gripping surface (1426) may extend parallel to the longitudinal axis defined by the cannula (124) of the cannula (120). The gripping surface (1426) may be smooth or non-smooth. FIG. 31 As shown, the gripping surface (1426) may include a smooth surface that frictionally engages with the ribs (128) of the cannula (120). Alternatively, the gripping surface (1426) may include a non-smooth surface that may include one or more features for locking engagement with the cannula conduit (124). For example, the hub (1412) of the depth limiter (1410) may be secured to the cannula (120) or to a fan-shaped cannula using a mating thread (such as a nut). The thread may be helical or non-helical (e.g., fan-shaped). For example, the gripping surface (1426) may include at least one tooth configured to lockably engage with at least one rib (128) of the cannula (120). The depth limiter (1410) may be disposable.

[0208] III. Exemplary Combinations

[0209] The following embodiments relate to various non-exhaustive ways in which the teachings herein can be combined or applied. It should be understood that the following embodiments are not intended to limit the coverage of any claims that can be presented that can include additional features that are not specified below. No admission is made that any particular embodiment is more closely related to one or more aspects of the patentable novelty than to others. The following embodiments are provided for illustrative purposes only. Various teachings herein can be arranged and combined in a variety of other ways. It is contemplated that some variations can omit, substitute, or add to certain features described below. Accordingly, no particular aspect or feature is necessarily to be limiting, unless otherwise expressly stated by the inventor or inheritor of the inventor’s rights. If any claims are presented that include, but do not specifically recite at least one of the features below, such claims should be understood as including that element irrespective of the inclusion of the following features.

[0210] Example 1

[0211] A surgical access device assembly comprising: (a) a cannula comprising: (i) a working channel configured to guide a surgical instrument along a central axis of the cannula, and (ii) at least one helical tissue engagement feature disposed along an outer surface of the cannula, wherein the helical tissue engagement feature is configured to stabilize the cannula relative to a body lumen wall when the cannula is inserted distally through the body lumen wall of a patient; and (b) a depth limiter movably coupled with the cannula, wherein the depth limiter comprises at least one body portion extending about a central axis of the depth limiter and comprising at least one protrusion extending radially inward relative to the central axis of the depth limiter, wherein the at least one body portion is angularly movable relative to the cannula between a fine adjustment configuration and a coarse adjustment configuration, wherein in the fine adjustment configuration the at least one protrusion is configured to selectively threadably engage the at least one helical tissue engagement feature, wherein in the coarse adjustment configuration the at least one protrusion is configured to selectively threadably disengage the at least one helical tissue engagement feature such that the depth limiter is axially translatable along the cannula.

[0212] Example 2

[0213] The surgical access device assembly of claim 1, wherein the at least one protrusion comprises a plurality of circumferentially arranged protrusions.

[0214] Example 3

[0215] The surgical intervention device assembly of any of the preceding embodiments, wherein the cannula comprises at least one longitudinal track disposed along an outer surface of the cannula, wherein in the coarse adjustment configuration, the at least one protrusion is configured to selectively slidably engage the at least one longitudinal track.

[0216] Example 4

[0217] The surgical intervention device assembly of embodiment 3, wherein the one body portion comprises a first body portion and a second body portion rotatable relative to one another about the central axis of the depth limiter, wherein the at least one protrusion comprises a first protrusion provided by the first body portion and a second protrusion provided by the second body portion.

[0218] Example 5

[0219] The surgical intervention device assembly of embodiment 4, wherein the first body portion and the second body portion are rotatable relative to one another about the central axis of the depth limiter between a timed configuration in which the first protrusion and the second protrusion are radially aligned with one another and at least one untimed configuration in which the first protrusion and the second protrusion are radially misaligned with one another.

[0220] Example 6

[0221] The surgical intervention device assembly of embodiment 5, wherein at least one of the first protrusion or the second protrusion is configured to selectively threadably engage the at least one helical tissue engagement feature in response to the first body portion and the second body portion being in the untimed configuration.

[0222] Example 7

[0223] The surgical intervention device assembly of embodiment 6, wherein the at least one longitudinal track has a width, and wherein the first protrusion and the second protrusion collectively occupy an envelope having an effective width greater than the width of the at least one longitudinal track when the first body portion and the second body portion are in the untimed configuration.

[0224] Example 8

[0225] The surgical intervention device assembly of any one of embodiments 5-7, wherein the first protrusion and the second protrusion are configured to selectively slidably engage the at least one longitudinal track when the first body portion and the second body portion are in the time-controlled configuration.

[0226] Example 9

[0227] The surgical intervention device assembly of embodiment 8, wherein the at least one longitudinal track has a width, and wherein the first protrusion and the second protrusion collectively occupy an envelope having an effective width that is less than the width of the at least one longitudinal track when the first body portion and the second body portion are in the time-controlled configuration.

[0228] Example 10

[0229] The surgical intervention device assembly of any one of embodiments 5-9, wherein the first body portion and the second body portion are biased toward the non-time-controlled configuration.

[0230] Example 11

[0231] The surgical intervention device assembly of any one of the preceding embodiments, wherein the at least one body portion comprises a first body portion and a second body portion that are pivotably coupled together by a hinge such that the first body portion and the second body portion are pivotable relative to one another about the hinge between the fine adjustment configuration and the coarse adjustment configuration, wherein the at least one protrusion comprises a first protrusion provided by the first body portion and a second protrusion provided by the second body portion.

[0232] Example 12

[0233] The surgical intervention device assembly of embodiment 11, wherein the first protrusion and the second protrusion are configured to pivot radially outward from the at least one helical tissue engagement feature when in the coarse adjustment configuration.

[0234] Example 13

[0235] The surgical intervention device of any one or more of embodiments 11-12, wherein the hinge comprises a living hinge.

[0236] Example 14

[0237] The surgical intervention device assembly of embodiment 13, wherein the first body portion and the second body portion and the living hinge are integrally formed together as a unitary piece.

[0238] Example 15

[0239] The surgical access device assembly of any one of embodiments 11-14, wherein the first body portion and the second body portion are biased toward the fine adjustment configuration.

[0240] Example 16

[0241] A depth limiter configured to couple with a cannula tubing of a trocar, the cannula tubing having at least one helical tissue engagement feature disposed along an outer surface of the cannula tubing, the depth limiter comprising: (a) a first body portion; (b) a second body portion movably coupled to the first body portion such that the first body portion and the second body portion are movable relative to one another between a fine adjustment configuration and a coarse adjustment configuration; (c) at least one first protrusion provided by the first body portion and extending radially inward relative to a central axis of the depth limiter; (d) at least one second protrusion provided by the second body portion and extending radially inward relative to the central axis of the depth limiter, wherein in the fine adjustment configuration at least one of the first protrusion or the second protrusion is configured to selectively threadably engage the at least one helical tissue engagement feature of the cannula tubing, wherein in the coarse adjustment configuration the first protrusion and the second protrusion are configured to selectively threadably disengage the at least one helical tissue engagement feature of the cannula tubing.

[0242] Example 17

[0243] The depth limiter of embodiment 16, wherein the first body portion and the second body portion are rotatable relative to one another about the central axis of the depth limiter between a timed configuration in which the first protrusion and the second protrusion are radially aligned with one another and at least one untimed configuration in which the first protrusion and the second protrusion are radially misaligned with one another, wherein the timed configuration at least partially defines the coarse adjustment configuration and the untimed configuration at least partially defines the fine adjustment configuration.

[0244] Example 18

[0245] The depth limiter of embodiment 16, wherein the first body portion and the second body portion are pivotable relative to one another about a hinge axis perpendicular to the central axis of the depth limiter between the fine adjustment configuration and the coarse adjustment configuration.

[0246] Example 19

[0247] A method of using a depth limiter with a trocar, wherein the depth limiter includes at least one body portion extending about a central axis of the depth limiter and having at least one protrusion extending radially inward relative to the central axis of the depth limiter, the method comprising: (a) positioning the at least one body portion about a cannula tube of a trocar, the cannula tube having at least one helical tissue engagement feature; (b) moving the at least one body portion relative to the cannula tube between a fine adjustment configuration in which the at least one protrusion selectively threadably engages the at least one helical tissue engagement feature and a coarse adjustment configuration in which the at least one protrusion selectively threadably disengages the at least one helical tissue engagement feature; (c) moving the at least one body portion helically relative to the cannula tube while in the fine adjustment configuration; and (d) moving the at least one body portion translationally relative to the cannula tube while in the coarse adjustment configuration.

[0248] Example 20

[0249] According to the method of embodiment 19, wherein moving the at least one body portion relative to the cannula tube between the fine adjustment configuration and the coarse adjustment configuration comprises moving the at least one body portion angularly relative to the cannula tube.

[0250] IV. Miscellaneous

[0251] It should be appreciated that any one or more of the teachings, expressions, embodiments, examples, etc. described herein can be combined with any one or more of the other teachings, expressions, embodiments, examples, etc. described herein. The above-described teachings, expressions, embodiments, examples, etc. should therefore not be viewed in isolation relative to each other. Various suitable methods, features, components, and / or functions described herein can be employed in conjunction with each other, without necessarily being out of context. Such modifications and variations are intended to be included within the scope of the claims. It is intended that the claims cover all such modifications and variations as fall within the scope of the claims.

[0252] Furthermore, any one or more of the teachings of this document can be combined with any one or more of the teachings of the following patent applications: U.S. Patent Application entitled "Pinch-To-Release Cannula Depth Limiter" [Attorney Docket No. END9247USNP1] filed on even date herewith; U.S. Patent Application entitled "Multi-Diameter Cannula Depth" [Attorney Docket No. END9247USNP2] filed on even date herewith; U.S. Patent Application entitled "Pinch-To-Clamp Cannula Depth Limiter" [Attorney Docket No. END9247USNP3] filed on even date herewith; U.S. Patent Application entitled "Universal Size Multi-Walled Elastomer Cannula Depth Limiter" [Attorney Docket No. END9247USNP4] filed on even date herewith; U.S. Patent Application entitled "Tilting Tang Cannula Depth Limiter" [Attorney Docket No. END9247USNP6] filed on even date herewith; U.S. Patent Application entitled "Two Piece Separable Obturator" [Attorney Docket No. END9247USNP7] filed on even date herewith; U.S. Patent Application entitled "Latchless Obturator with Interference Fit Feature" [Attorney Docket No. END9247USNP8] filed on even date herewith; U.S. Patent Application entitled "Balancing Feature for Reusable Trocar" [Attorney Docket No. END9247USNP9] filed on even date herewith; U.S. Patent Application entitled "Airflow Channels and Patterns in Lumen for Cannula" [Attorney Docket No. END9247USNP10] filed on even date herewith; and / or U.S. Patent Application entitled "Stabilizer for Surgical Shafts or Cannulas" [Attorney Docket No. END9247USNP11] filed on even date herewith. The disclosure of each of these patent applications is hereby incorporated by reference herein.

[0253] It should be understood that any patents, patent publications, or other publications referred to herein are incorporated by reference in their entirety only to the extent that the incorporated material is not inconsistent with existing definitions, statements, or other disclosure material set forth in the present disclosure. Thus, and to the extent necessary, the disclosure herein expressly incorporates by reference the entire text of all patent, patent publication, and other disclosure materials cited herein. Any material, or portion thereof, that is said to be incorporated by reference herein, but which contradicts the present disclosure, including definitions, is only incorporated to the extent that the material is not contradictory.

[0254] Versions of the devices described above can have application in conventional medical treatments and procedures conducted by a medical professional, as well as application in robotic-assisted medical treatments and procedures. By way of example only, various teachings herein can be readily incorporated into a robotic surgical system such as the DAVINCI® system by Intuitive Surgical, Inc., of Sunnyvale, California. TMSystem. Similarly, those of ordinary skill in the art will recognize that the various teachings herein can be readily incorporated into any of the various teachings of the following patents: U.S. Patent 5,792,135, entitled "Articulated Surgical Instrument For Performing Minimally Invasive Surgery With Enhanced Dexterity and Sensitivity," issued August 11, 1998, the disclosure of which is incorporated by reference herein; U.S. Patent 8,783,541, entitled "Robotically-Controlled Surgical End Effector System," issued July 22, 2014, the disclosure of which is incorporated by reference herein; U.S. Patent 8,479,969, entitled "Drive Interface for Operably Coupling a Manipulatable Surgical Tool to a Robot," issued July 9, 2013; U.S. Patent 8,800,838, entitled "Robotically-Controlled Cable-Based Surgical End Effectors," issued August 12, 2014, the disclosures of which are incorporated by reference herein; and / or U.S. Patent 8,573,465, entitled "Robotically-Controlled Surgical End Effector System with Rotary Actuated Closure Systems," issued November 5, 2013, the disclosure of which is incorporated by reference herein.

[0255] Devices of the foregoing variety can be designed to be disposed of after a single use, or they can be designed to be used multiple times. Devices may, in either case or in both cases, be reconditioned for reuse after at least one use. Reconditioning can include any combination of the steps of disassembly of the device, followed by cleaning and / or replacement of particular pieces, and subsequent reassembly. In particular, some versions of the device can be disassembled, and certain identified pieces can be selectively replaced or removed in any combination. Upon cleaning and / or replacement of particular pieces, some versions of the device can be reassembled for subsequent use either at a reconditioning facility, or by a user immediately prior to a procedure. Those skilled in the art will appreciate that reconditioning of a device can utilize a variety of techniques for disassembly, cleaning / replacement, and reassembly. Use of such techniques, and the resulting reconditioned device, are all within the scope of the present application.

[0256] By way of example only, the versions described herein can be sterilized prior to and / or following a procedure. In one sterilization technique, the device is placed in a closed and sealed container, such as a plastic or TYVEK bag. The container and device can then be placed in a field of radiation that can penetrate the container, such as gamma radiation, x-rays, or high-energy electrons. The radiation can kill bacteria on the device and in the container. The sterilized device can then be stored in the sterile container for later use. A device can also be sterilized using any other technique known in the art, including but not limited to beta or gamma radiation, ethylene oxide, or steam.

[0257] Having shown and described various embodiments of the present application, further adaptations and modifications can be made by those of ordinary skill in the art without departing from the scope of the application. Several of such possible modifications have already been mentioned, and others will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. For example, the embodiments, implementations, geometries, materials, dimensions, ratios, steps, and the like discussed above are illustrative and not necessary. Accordingly, the specification and figures are to be regarded in an illustrative manner and should be understood that the application is not limited to the details shown and described herein.

Claims

1. A surgical interventional device assembly, comprising: (a) Intubation, the intubation comprising: (i) A working channel configured to guide surgical instruments along the central axis of the cannula. (ii) at least one helical tissue engagement feature disposed along the outer surface of the cannula, wherein the helical tissue engagement feature is configured to stabilize the cannula relative to the body cavity wall when the cannula is inserted distally through the patient's body cavity wall, and (iii) at least one longitudinal track, said at least one longitudinal track being disposed along the outer surface of the cannula; and (b) a depth limiter movably coupled to the cannula, wherein the depth limiter comprises: (i) The first main body, (ii) a second main body portion, wherein each of the first main body portion and the second main body portion extends about the central axis of the depth limiter, and (iii) at least one protrusion extending radially inward relative to the central axis of the depth limiter. The first and second main body portions are rotatable about the central axis relative to each other and relative to the cannula between a fine adjustment configuration and a coarse adjustment configuration. In the fine adjustment configuration, the at least one protrusion is configured to selectively engage the at least one helical tissue engagement feature in a threaded manner. In the coarse adjustment configuration, the at least one protrusion is configured to selectively disengage from the at least one helical tissue engagement feature in a threaded manner and to selectively slidably engage the at least one longitudinal track, such that the depth limiter can translate axially along the cannula.

2. The surgical interventional device assembly according to claim 1, wherein, The at least one protrusion includes a plurality of circumferentially arranged protrusions.

3. The surgical interventional device assembly according to claim 2, wherein, The at least one protrusion includes a first protrusion provided by the first body portion and a second protrusion provided by the second body portion.

4. The surgical interventional device assembly according to claim 3, wherein, The first main body portion and the second main body portion are rotatable relative to each other about the central axis of the depth limiter in a time-controlled configuration and at least one non-time-controlled configuration, in which the first protrusion and the second protrusion are radially aligned with each other, and in the at least one non-time-controlled configuration, the first protrusion and the second protrusion are radially misaligned with each other.

5. The surgical interventional device assembly according to claim 4, wherein, At least one of the first protrusion or the second protrusion is configured to selectively engage the at least one helical joint feature in a threaded manner in response to the first body portion and the second body portion being in the time-independent configuration.

6. The surgical interventional device assembly according to claim 5, wherein, The at least one longitudinal track has a width, and wherein when the first body portion and the second body portion are in the non-time-controlled configuration, the first protrusion and the second protrusion together occupy an envelope with an effective width greater than the width of the at least one longitudinal track.

7. The surgical interventional device assembly according to claim 4, wherein, The first protrusion and the second protrusion are configured to selectively and slidably engage the at least one longitudinal track when the first body portion and the second body portion are in the time-controlled configuration.

8. The surgical interventional device assembly according to claim 7, wherein, The at least one longitudinal track has a width, and wherein when the first body portion and the second body portion are in the timing configuration, the first protrusion and the second protrusion together occupy an envelope with an effective width less than the width of the at least one longitudinal track.

9. The surgical interventional device assembly according to claim 4, wherein, The first main body portion and the second main body portion are biased toward the time-independent configuration.

10. The surgical interventional device assembly according to claim 1, wherein, The at least one main body portion includes a first main body portion and a second main body portion, the first main body portion and the second main body portion being pivotally connected together by a hinge, such that the first main body portion and the second main body portion are pivotable relative to each other about the hinge between the fine adjustment configuration and the coarse adjustment configuration, wherein the at least one protrusion includes a first protrusion provided by the first main body portion and a second protrusion provided by the second main body portion.

11. The surgical interventional device assembly of claim 10, wherein, The first protrusion and the second protrusion are configured to pivot radially outward from the at least one spiral tissue joint feature when in the coarse adjustment configuration.

12. The surgical interventional device assembly according to claim 10, wherein, The hinge includes a movable hinge.

13. The surgical interventional device assembly according to claim 12, wherein, The first main body portion, the second main body portion, and the movable hinge are integrally formed into a single piece.

14. The surgical interventional device assembly of claim 10, wherein, The first main body portion and the second main body portion are biased toward the finely tuned configuration.

15. A depth limiter configured to engage with a cannula of a trocar, the cannula having at least one helical tissue engagement feature disposed along the outer surface of the cannula, the depth limiter comprising: (a) The first main body; (b) A second main body portion, which is movably connected to the first main body portion, such that the first main body portion and the second main body portion are movable relative to each other between a fine-tuning configuration and a coarse-tuning configuration; (c) A first protrusion, said at least one first protrusion being provided by the first body portion and extending radially inward relative to the central axis of the depth limiter; as well as (d) A second protrusion, said at least one second protrusion being provided by the second body portion and extending radially inward relative to the central axis of the depth limiter, wherein, in the fine adjustment configuration, at least one of the first or second protrusion is configured to selectively engage the at least one helical tissue engagement feature of the cannula in a threaded manner, wherein, in the coarse adjustment configuration, the first and second protrusions are configured to selectively disengage from the at least one helical tissue engagement feature of the cannula in a threaded manner. The first and second main body portions are rotatable relative to each other about the central axis of the depth limiter in a time-controlled configuration and a non-time-controlled configuration, wherein in the time-controlled configuration the first and second protrusions are radially aligned with each other, and in the non-time-controlled configuration the first and second protrusions are radially misaligned with each other, wherein the time-controlled configuration at least partially defines the coarse adjustment configuration, and the non-time-controlled configuration at least partially defines the fine adjustment configuration.

16. The depth limiter according to claim 15, wherein, The first and second main body portions are pivotable relative to each other about a hinge axis perpendicular to the central axis of the depth limiter between the fine adjustment configuration and the coarse adjustment configuration.

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