Balance feature of reusable cannula

Abstract

This invention discloses a surgical interventional device assembly including a cannula hub and a cannula portion. The cannula portion extends distally from the cannula hub along a longitudinal axis. The cannula portion defines a working channel. The cannula portion includes a tissue engagement feature and a balancing feature. The balancing feature is configured to improve the lateral stability of the cannula portion and the cannula hub relative to the patient's body cavity wall. The balancing feature includes a proximal portion of the cannula portion having a first wall thickness. The balancing feature also includes a distal portion of the cannula portion having a second wall thickness greater than the first wall thickness. At least a portion of the proximal portion is proximal to the tissue engagement feature. At least a portion of the distal portion is distal to the tissue engagement feature.

Description

[0001] priority

[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 018,558, filed May 1, 2020, entitled “Balancing Feature for Reusable Trocar”. Background Technology

[0003] Some surgical procedures may require clinicians to access the surgical site through the patient's abdominal cavity. To obtain this access, an opening is first created through the abdominal wall tissue that covers the abdominal cavity. In some surgical procedures (called "laparoscopic" or "endoscopic" surgery), a relatively small opening is created through the abdominal wall tissue, and then a thin instrument is inserted through the opening to access the surgical site. This thin instrument is inserted through an interventional device, commonly called a "cannula," located within the opening. A conventional cannula typically consists of a cannulation assembly and an occluder removably received within the working channel of the cannulation assembly. In use, the occluder engages with the cannulation assembly, and the combined structure (i.e., the cannula) is guided downwards by the clinician through the patient's abdominal wall, such that the distal ends of the occluder and the cannulation assembly extend into the abdominal cavity. The clinician then withdraws the occluder from the cannulation assembly, allowing surgical instruments to be guided downwards through the working channel of the cannulation 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 occluder 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 occluder;

[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 inserted into the abdominal cavity;

[0011] Figure 3C It shows Figure 1 A side sectional view of the cannulation assembly, showing its position after the occluder is disengaged 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 an occluder shown in an assembled state is shown;

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

[0015] Figure 6 Depicting along Figure 4 The line 6-6 was cut Figure 4 A cross-sectional view of the cannulation assembly;

[0016] Figure 7A Depicting the location within the patient's abdominal wall Figure 4 A cross-sectional view of the cannulation assembly, in which a clinician is holding the cannulation assembly and properly aligning it with the target area;

[0017] Figure 7B Depicting the location within the patient's abdominal wall Figure 4 A cross-sectional view of the cannulation assembly, showing the clinician having released the cannulation assembly so that it is tilted and no longer in contact with... Figure 7A Align with the target area;

[0018] Figure 8 A perspective view of an exemplary cannula is depicted;

[0019] Figure 9Depicting along Figure 8 The line 9-9 was cut off Figure 8 A cross-sectional view of the intubation cannula;

[0020] Figure 10 Depicting Figure 8 An enlarged cross-sectional view of the proximal portion of the cannula;

[0021] Figure 11 Depicting Figure 8 An enlarged cross-sectional view of the distal portion of the cannula;

[0022] Figure 12A Depicting by Figure 8 Intubation and Figure 5 A cross-sectional view of a cannula assembly formed by a disposable sealing component, wherein the cannula assembly is positioned within the abdominal wall of a patient, wherein a clinician is holding the cannula assembly, wherein the cannula assembly is properly aligned with the target area;

[0023] Figure 12B Describing the location at Figure 12A abdominal wall Figure 12A A cross-sectional view of the cannulation assembly, wherein the cannulation assembly has been deployed by the clinician and is properly aligned with the target area; and

[0024] Figure 13 A cross-sectional view of an exemplary cannula is depicted.

[0025] The accompanying drawings are not intended to be limiting in any way, and various embodiments of the invention can be conceived to be implemented in many other ways, including those not necessarily shown in the drawings. The drawings, which are incorporated in and constitute a part of this specification, illustrate several aspects of the invention and, together with the description, serve to explain the principles of the invention; however, it should be understood that the invention is not limited to the explicit arrangements shown. Detailed Implementation

[0026] The following description of certain examples of the invention is not intended to limit the scope of the invention. Other examples, features, aspects, embodiments, and advantages of the invention will be apparent to those skilled in the art from the following description, which is shown by way of example, and a preferred mode is contemplated for carrying out the invention. It will be appreciated that the invention can have other different and obvious aspects, all of which are not departing from the invention. Therefore, the drawings and descriptions should be regarded as substantially illustrative and not restrictive.

[0027] For clarity of disclosure, the terms "proximal" and "distal" are defined herein in relation to the surgeon or other operator who grasps the surgical device. The term "proximal" refers to a position where the element is positioned closer to the surgeon, and the term "distal" refers to a position where the element is positioned further away from the surgeon. Furthermore, the extent to which spatial terms such as "top," "bottom," "upper," "lower," "vertical," and "horizontal" are used herein with reference to the accompanying drawings should be understood to be for illustrative purposes only and not intended to be limiting or absolute. In this regard, it should be understood that surgical instruments such as those disclosed herein may be used in a variety of orientations and positions, not limited to those shown and described herein.

[0028] Furthermore, the terms “about” and “approximately” used herein in connection with any numerical value or range are intended to cover the exact value referenced, as well as the appropriate tolerance that enables the referenced feature or combination of features to be used for the intended purpose described herein.

[0029] I. Exemplary single-use cannulas and reusable cannulas

[0030] Figures 1 to 5 Exemplary surgical interventional devices are shown in the form of a single-use first cannula (10) and a reusable second cannula (110), each cannula configured to provide surgical site access in laparoscopic surgery. Each cannula (10, 110) includes a cannulation assembly (12, 112) having a working channel (14, 114) and an occluder (16, 116) configured to be removably and coaxially inserted into the working channel (14, 114) such that the assembled cannula (10, 110) can be guided distally through the patient's abdominal wall and approach the abdominal cavity, for example, as described below. Figures 3A to 3D As stated above.

[0031] A. An exemplary single-use cannula

[0032] like Figures 1 to 2As shown, the cannulation assembly (12) of a single-use trocar (10) includes a cannula (20) and a sealing housing (30). The cannula (20) and the sealing housing (30) cooperate to define a working channel (14) that extends longitudinally along the central axis (A) of the trocar (10). Specifically, the working channel (14) is defined by the lumen of the cannula (20) communicating with the hollow interior of the sealing housing (30). The cannulation assembly (12) is configured to receive elongated surgical instruments distally through the working channel (14) to provide access to surgical sites within the patient's abdominal cavity. As described in more detail below, the sealing housing (30) houses a pair of sealing structures that define a sealing assembly configured to retain airflow into the patient's abdominal cavity while allowing surgical instruments and tissue debris to pass through the working channel (14).

[0033] The cannula (20) of this type may include: a bell-shaped hub (not shown) located at the proximal end of the cannula; and an elongated cylindrical tube (22) extending distally from the hub and terminating at an angled cannula tip (24). The outer surface of the cannula portion (22) includes a plurality of tissue gripping features in the form of annular ribs (26) axially arranged along the middle portion of the cannula portion (22). The ribs (26) are configured to grip the abdominal wall tissue layers through which the cannula (20) is inserted, thereby aiding in stabilizing the cannula (20) in both the axial and radial directions when it is positioned within an opening formed in the patient's abdominal wall.

[0034] More specifically, in this example, the tissue-grasping ribs (26) are formed in an annular fan shape in the sidewall of the cannula (22), such that each rib (26) tapers radially inward from its outermost radial edge in a distal direction. Thus, the outermost radial edge of the ribs (26) is approximately flush with the unribbed proximal and distal portions of the cannula (22). The configuration of the resulting ribs (26) facilitates the distal advancement of the cannula (22) through the tissue layer and prevents its retraction through the tissue layer in the opposite proximal direction. Advantageously, this configuration prevents accidental withdrawal of the cannula (22) from the patient's abdominal wall during surgery. However, it should be understood that in other types of cannulas (10), the cannula (22) may be provided with various other types of tissue-grasping features. For example, the cannula portion (22) may include tissue gripping features in the form of one or more spiral ribs that extend around at least the middle portion of the cannula portion (22) and may be fan-shaped similar to ribs (26).

[0035] The sealing housing (30) of the cannula assembly (12) includes a proximal housing portion (32) and a distal housing portion (34), the proximal housing portion (32) being removably attached to the distal housing portion. The proximal housing portion (32) includes a proximal head (36) and a distal base (38) fixed together. The distal housing portion (34) includes: a distal shield (40) surrounding a proximal hub (not shown) of the cannula (20); a cover plate (42) fixed to the proximal end of the distal shield (40); and a latching ring (44) rotatably disposed between the distal shield and the cover plate and having a radially outwardly projecting tab (46). The latching ring (44) is selectively rotatable between a locked position and an unlocked position about the central axis (A) of the cannula needle (10) via the tab (46). In the locked position, the latch ring (44) locks the proximal housing portion (32) to the distal housing portion (34). In the unlocked position, the latch ring (44) allows the proximal housing portion (32) to separate from the distal housing portion (34), for example, to directly access the distal sealing structure (not shown) housed within the distal housing portion (34). In some configurations, the distal shield (40) may be integrally formed with the proximal end of the cannula portion (22), such that the distal shield (40) is a component of the cannula (20).

[0036] Although not shown, the proximal housing portion (32) houses a proximal (or "outer") sealing structure, and the distal housing portion (34) houses a distal (or "inner") sealing structure, both arranged along the central axis (A) of the cannula (10). The proximal and distal sealing structures cooperate to define a sealing assembly that retains airflow into the patient's abdominal cavity during surgery while allowing surgical instruments and tissue debris to pass through the working channel (14). For example, the proximal sealing structure may include an annular sealing member configured to sealably engage the axis of a laparoscopic surgical instrument guided through the working channel (14). The distal end sealing structure may include a duckbill-shaped sealing member configured to maintain the working channel (14) in a sealed state even without the surgical instrument axis.

[0037] The cannulation assembly (12) also includes a blow-in port (50) operably coupled to the proximal end of the cannula (20) and having an adjustable valve in the form of a stopcock valve (52). The blow-in port (50) is configured to guide a blow-in fluid, such as carbon dioxide, from a fluid source (not shown) distally through the working channel (14) and toward the patient's abdominal cavity, thereby expanding (or "blowing in") the cavity with fluid. This expansion of the abdominal cavity creates additional space for easier laparoscopic surgery.

[0038] like Figure 1 and Figure 2As shown, the occluder (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 occluder shaft (62) is configured to be received within the working channel (14) of the cannula assembly (12) such that the occluder tip (64) extends distally through the cannula tip (24). The occluder 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 within corresponding slots (not shown) formed in the top surface of the sealing housing head (36) to connect the occluder (16) to the cannula assembly (12). A latch button (74) is actuable to release the locking arm (72) from the slot, thereby allowing the occluder (16) to separate from the cannulation assembly (12). The occluder (16) also includes a central channel (76) extending longitudinally through the occluder head (60) and the occluder 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 occluder 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 occluder (16) in other configurations.

[0039] The cannulation assembly (12) and the occluder (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 to 5 The cannula (110) is described in more detail.

[0040] B. Exemplary deployment of the cannula near the patient's abdominal cavity

[0041] Figures 3A to 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.

[0042] like Figure 3AAs shown, with the occluder (16) received within the cannulation assembly (12) and connected to the sealing housing (30), the clinician manipulates the cannula (10) via the occluder head (60) and the sealing housing (30) to push the occluder 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 occluder 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 occluder (16). Once the cannula (20) has reached the desired depth in the insertion cavity (1), the clinician releases the occluder head (60) from the sealing housing (30) by pressing the latch button (74), and then withdraws the occluder (16) proximally from the cannula assembly (12), as shown. 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, the tissue engagement ribs (26) located on the cannulation tube (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.

[0043] C. An exemplary reusable cannula with a disposable sealing assembly

[0044] 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 to 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.

[0045] Similar to the cannula (10), the cannula (110) includes a cannula assembly (112) having a working channel (114) and an occluder (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 portion (124) includes a plurality of tissue gripping features in the form of annular ribs (128) arranged axially along the middle portion of the cannula portion (124) and similar to the ribs (26) described above.

[0046] 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).

[0047] The lower portion of the sealing assembly (130) distal to the inlet port (140) is configured to be housed within the proximal hub (122) of the cannula (120), such that an annular sealing member (144) arranged circumferentially around the lower portion seals against the inner surface of the cannula hub (122). In this manner, the interior of the sealing assembly (130) is in fluid communication with the lumen of the cannula (120) to define a working channel (114) for the cannula assembly (112), through which inlet fluid, surgical instruments, and tissue fragments can be guided, in a manner generally described above in conjunction with the cannula (10). The sealing assembly (130) may be further constructed in accordance with the teachings of one or more of the following patents: U.S. Patent Publication 2019 / 0090905 entitled “Trocar Seal Assemblies”, published March 28, 2019, the disclosure of which is incorporated herein by reference; and / or U.S. Patent Publication 2019 / 0380742 entitled “Asymmetric Shaft Seal”, published December 19, 2019, the disclosure of which is incorporated herein by reference.

[0048] like Figure 5 As best shown, the occluder (116) of the cannula (110) includes a proximal head (150), an elongated cylindrical shaft (152) extending distally from the head (150), and a tapered tip (154) located at the distal end of the shaft (152). The occluder head (150) includes a dome-shaped upper body (156), a base plate (158), and an actuable latching member (160) including a pair of downwardly extending latching arms (162) and a corresponding pair of latching buttons (164). The latching arms (162) are configured to be captured within corresponding slots (138) formed in the top surface of the upper frame member (132) of the sealing assembly (130) to engage the occluder (116) with the cannula assembly (112). The latch button (164) is actuable to release the locking arm (162) from the slot (138), thereby allowing the occluder (116) to separate from the cannulation assembly (112).

[0049] The cannula (120) and occluder (116) in this example are suitably constructed of robust materials such as surgical steel, allowing them to be sterilized and reused for multiple surgical procedures. In contrast, as described above, the sealing assembly (130) is constructed as a single-use unit, intended to be separate from the cannula (120) and replaced after each procedure. For example, the sealing assembly (130) may be constructed of a variety of polymeric materials, including plastics and rubber, making it easy to manufacture and sell at a price that allows the sealing assembly (130) to be disposed of after a single use, similar to the cannula (10) described above.

[0050] II. Exemplary balancing feature for reusable cannula

[0051] like Figure 6 As shown, the center of gravity (CG1) of the cannulation assembly (112) is located near the proximal end of the elongated cylindrical tube section (124) and the bell-shaped hub (122). Furthermore, the cross-sectional thickness of the elongated cylindrical tube section (124) can be substantially uniform at both the proximal and distal ends, with slight variations to accommodate the annular rib (128). In other words, the inner and outer diameters of the proximal and distal portions of the cylindrical tube section (124) can be substantially the same.

[0052] Because the cannula (120) and occluder (116) are constructed of robust materials, the cannula (120) and occluder (116) may have a greater mass and resulting weight compared to the cannula (12) and occluder (16) of the single-use trocar (10) described above. As will be described in more detail below, the greater mass and weight of the cannula (120) may cause instability and / or lack of balance of the cannula (120) relative to the abdominal wall (2) in the lateral (i.e., radial or lateral) direction, causing the cannula (120) to point or tilt to one side during exemplary use as described herein, thus causing the working channel (114) to become misaligned with the target operating area (T).

[0053] Figure 7A As shown in this document, the intubation assembly (112) provides a suitable access to the patient's body cavity (1) via a working channel (114), in accordance with the teachings of this document. Therefore, in access to... Figure 7A Prior to the position shown, the occluder (116) and cannulation assembly (112) can be used together such that the occluder tip (154) and cannulation tip (126) are pushed distally through the skin (3), fat layer (4), and fascia layer (5) to access the body cavity (1). Once access is achieved, the clinician can remove the occluder (116) as described herein. Next, as... Figure 7A As shown, the clinician can position the cannulation assembly (112) relative to the patient in the desired position, aligning the central axis (A1) with the target operating area (T). Similar to the tissue engagement rib (26) described above, the tissue engagement rib (128) located on the cannulation tube (124) grips the tissue layers (3,4,5) of the abdominal wall (2), thereby providing the cannulation assembly (112) with at least a minimum degree of axial and lateral stability relative to the abdominal wall (2).

[0054] During exemplary use, it may be desirable for the central axis (A1) to maintain proper alignment with the target operating area (T) after the clinician releases the cannulation assembly (112) for access to the body cavity (1) via the working channel (114) as described herein. However, in some cases, such as Figures 7A to 7B As shown in the diagram, when the clinician releases the cannulation assembly (112), the cannulation assembly (112) may become unbalanced and “flip over”, causing the working channel (114) to become misaligned with the target operating area (T).

[0055] With the center of gravity (CG1) and the portion of the abdominal wall (2) of the tissue-joining rib (128) laterally separated, a fulcrum force and a resulting torque can be generated. The fulcrum force generated by the weight of the cannula assembly (112) and acting at the center of gravity (CG1) is applied as a torque to the portion of the abdominal wall (2) of the rib (128) and may become too large, causing the cannula assembly (112) to tip over, thereby causing the working channel (114) to misalign with the target operating area (T). The cannula assembly (112) may tip over more easily than the cannula assembly (112) described above, partly due to the increased weight of the cannula assembly (112), which in turn generates a larger fulcrum force acting at the center of gravity, thus generating a larger tipping torque around the portion of the cannula assembly (112) positioned within the abdominal wall (2). Therefore, a center of gravity position acceptable for a lightweight, single-use cannula (20) may be unacceptable for a heavier cannula (120) formed of a robust material to facilitate sterilization and reuse in multiple surgical procedures.

[0056] As described above, the cannula assembly (112) may become unbalanced and “flip over,” causing the working channel (114) to become undesirably misaligned with the target operating area (T). Therefore, it may be desirable for the cannula assembly (112) to have a balancing feature that helps facilitate the desired placement of the cannula assembly (112) relative to the abdominal wall (2), such that (A) the working channel (114) can remain properly aligned with the target operating area (T) during exemplary use as described herein, and (B) the cannula (120) can be formed of a robust material for sterilization and reuse purposes.

[0057] Figures 8 to 11 An exemplary cannula (220) is shown that can be used to replace the aforementioned cannula (120); while Figures 12A to 12BAn exemplary use of a cannula assembly (212) formed by a cannula (220) and a sealing housing (130) is shown. The cannula (220) includes: a bell-shaped hub (222) located at the proximal end of the cannula; and an elongated cylindrical tube portion (224) extending distally from the hub (222) and terminating at an angled cannula tip (226); all of the above defining a working channel (214). The outer surface of the cannula tube portion (224) includes a plurality of tissue gripping features in the form of annular ribs (228) arranged axially along the middle portion of the cannula tube portion (224). The bell hub (222), the elongated cylindrical tube (224), the angled insertion tip (226), the working channel (214), and the annular rib (228) are substantially similar to the bell hub (122), the elongated cylindrical tube (124), the angled insertion tip (126), the working channel (114), and the annular rib (128), with the differences described below.

[0058] The cannula (220) also includes a balancing feature (235) integrated into the cannula section (224). As will be described in more detail below, the balancing feature (235) is configured to prevent the cannula assembly (212) from tipping over when the clinician releases the cannula assembly (212), so that the working channel (214) remains aligned with the target operating area (T).

[0059] The balancing feature (235) includes a proximal thinner section (230) with a relatively thin wall thickness, a distal thicker section (232) with a relatively thick wall thickness, and a transition section (234) between the proximal and distal sections (230, 232). The proximal thinner section (230) can extend from the bell hub (222) to the proximal portion of the elongated cylindrical tube (224), while the distal thicker section (232) can extend along the distal portion of the elongated cylindrical tube (224).

[0060] The bell-shaped hub (222) includes a distal delivery rod (225) sized to receive the proximal end of an elongated cylindrical tube portion (224). The bell-shaped hub (222) is secured to the cylindrical tube portion (224) via a coupling (236) through the distal delivery rod (225). Any suitable coupling (236) can be used in accordance with the teachings herein, as will be apparent to those skilled in the art. For example, the coupling (236) may include welding, adhesive bonding, and interference fits, etc.

[0061] like Figure 9As shown, the proximal thinner segment (230) can be designed to have a smaller wall thickness compared to the distal thicker segment (232). The reduced wall thickness of the proximal thinner segment (230) allows the proximal portion of the cannula (220) to be formed with less material than the corresponding portion of the cannula (120). Therefore, the proximal thinner segment (230) can be lighter than the corresponding portion of the cannula (120).

[0062] In the current example, the bell hub (222) and portions of the defined proximal thinner section (230) of the cylindrical tube (224) have similar wall thicknesses. However, this is merely optional. In some cases, the bell hub (222) may have a different wall thickness compared to portions of the defined proximal thinner section (230) of the cylindrical tube (224). In some cases, the bell hub (222) may be truncated to be formed from less material. In some cases, the bell hub (222) may be entirely optional, such that the sealing housing (130) is configured to be operatively coupled to the proximal end of the elongated tube (224) without requiring the complete bell hub (222).

[0063] The thicker distal section (232) can be formed with a greater wall thickness compared to the thinner proximal section (230). The increased wall thickness of the thicker distal section (232) allows the distal portion of the cannula (220) to be formed with more material than the corresponding portion of the cannula (120). Therefore, the thicker distal section (232) can be heavier than the corresponding portion of the cannula (120).

[0064] The transition section (234) lies between the thinner proximal segment (230) and the thicker distal segment (232). In the current example, as... Figure 10 As shown, the transition portion (234) is located precisely on the proximal side of the proximal end of the annular rib (228). Although in the current example the transition portion (234) is located near the proximal end of the annular rib (228), it will be apparent to those skilled in the art that the transition portion (234) can be placed in any suitable location in accordance with the teachings herein.

[0065] Similarly, Figure 10As shown, the wall thickness of the thinner section (230) defined by the tube (224) is determined by the distance between the inner surface (240) and the proximal outer surface (242) of the tube (224). In the current example, the distance between the surfaces (240, 242) is substantially uniform along the length of the proximal section (230). In other words, the inner diameter defined by the inner surface (240) and the outer diameter defined by the proximal outer surface (242) are substantially uniform along the length of the proximal section (230). However, this is merely optional. In some cases, the distance between the surfaces (240, 242) may deviate along the length of the proximal section (230).

[0066] like Figure 11 As best shown, the wall thickness of the thicker section (232) is determined by the distance between the inner surface (240) of the tube (224) and (A) the distal outer surface (244) of the tube (224) or (B) a portion of the annular rib (228). Each annular rib (228) is formed by a shoulder portion (250) and a tapered portion (252), wherein the shoulder portion (250) and the tapered portion (252) are joined at their outer edges. The distal outer surface (244) may not protrude laterally from the working channel (214) further than the shoulder portion (250) of the annular rib (228). This helps ensure that the annular rib (228) still properly grips the tissue to enhance the stability of the cannula (220) during exemplary use.

[0067] In the current example, the distance between the surfaces (240, 244) is substantially uniform along the length of the tube portion (224) including the distal outer surface (244). In other words, the inner diameter defined by the inner surface (240) and the outer diameter defined by the distal outer surface (244) are substantially uniform along the length of the distal segment (232) having the distal outer surface (244). However, this is merely optional. In some cases, the distance between the surfaces (240, 244) may deviate along the length of the distal segment (232).

[0068] Furthermore, in the current example, the dimensions of the inner surface (240) are substantially uniform along the length of the tube portion (224). In other words, the inner diameter defined by the inner surface (240) is substantially uniform along the length of the tube portion (224). However, this is merely optional, as the dimensions of the working channel (214) defined by the inner surface (240) can have any suitable geometry, as will be apparent to those skilled in the art, in accordance with the teachings herein. For example, the inner surface (240) can have a tapered geometry, an undulating geometry, etc.

[0069] Compared to the center of gravity (CG1) of the aforementioned cannula (120), the shift in weight distribution caused by the dimensional changes in the thinner proximal segment (230) and the thicker distal segment (232) can shift the center of gravity (CG2) of the cannula (220) distally. As will be described in more detail below, this allows the balancing feature (235) to prevent accidental tipping of the cannula assembly (220) during exemplary use.

[0070] Figure 12A As shown in this document, the intubation assembly (212) provides a suitable access to the patient's body cavity (1) via a working channel (214), in accordance with the teachings of this document. Therefore, in access to... Figure 12A Prior to the position shown, the occluder (116) and cannulation assembly (212) can be used together such that the occluder tip (154) and cannulation tip (226) are pushed distally through the skin (3), fat layer (4), and fascia layer (5) to access the body cavity (1). Once access is achieved, the clinician can remove the occluder (116) as described herein. Next, as... Figure 12A As shown, the clinician can position the cannulation assembly (212) relative to the patient in the desired position, aligning the central axis (A2) with the target operating area (T). Similar to the tissue engagement rib (26) described above, the tissue engagement rib (228) located on the cannulation tube (224) grips the tissue layers (3,4,5) of the abdominal wall (2), thereby providing the cannulation assembly (212) with at least a minimum degree of axial and lateral stability relative to the abdominal wall (2).

[0071] During exemplary use, it may be desirable for the central axis (A2) to maintain proper alignment with the target operating area (T) after the clinician releases the cannulation assembly (212) for access to the body cavity (1) via the working channel (214) as described herein. Figures 12A to 12B As shown, when the clinician releases the cannula assembly (212), the balance feature (235) of the cannula (220) prevents the cannula assembly (212) from tipping over, thereby keeping the working channel (214) aligned with the target operating area (T).

[0072] Compared to the fulcrum force and torque exerted by the center of gravity (CG1) of the aforementioned cannula (120), placing the center of gravity (CG2) closer to the portion of the elongated cylindrical tube (224) designed to engage the abdominal wall (2) reduces the fulcrum force and resulting torque exerted on the portion of the tissue engagement rib (228) engaging the abdominal wall (2) due to the weight of the cannula (220). This reduction in fulcrum force is at least partly due to the reduction in the lateral distance between the center of gravity (CG2) and the portion of the tissue engagement rib (228) engaging the abdominal wall (2). Therefore, shifting the center of gravity (CG2) closer to the portion of the tube (224) engaging the abdominal wall (2) allows clinicians to more easily balance the cannula (220) relative to the patient's abdominal wall (2) to maintain alignment of the working channel (214) with the target operating area (T).

[0073] In other words, while the overall weight of the cannula (220) formed from robust, sterilizable, and reusable materials may not be significantly reduced, the geometry of the cannula (220) can be modified to effectively shift the center of gravity (CG2) closer to the portion of the tube (224) configured to engage the abdominal wall (2) (i.e., distally). This, in turn, reduces the fulcrum force and resulting torque applied to the engagement between the tube portion (224) of the cannula (220) and the patient's abdominal wall (2). Therefore, the modified center of gravity (CG2) helps reduce the likelihood of the cannula assembly (212) tipping over during use.

[0074] Figure 13 Another exemplary cannula (270) is shown that can be used to replace the aforementioned cannulas (120, 220). The cannula (270) is substantially similar to the aforementioned cannulas (220), except that the balancing feature (285) includes a greater mass and resulting weight difference between the thinner proximal segment (280) and the thicker distal segment (282), causing the center of gravity (CG3) to shift further distally.

[0075] The cannula (270) includes: a bell-shaped hub (272) located at the proximal end of the cannula; and an elongated cylindrical tube (274) extending distally from the hub (272) and terminating at an angled cannula tip (276); all of which define a working channel (264). The outer surface of the cannula tube (274) includes a plurality of tissue gripping features in the form of annular ribs (278) arranged axially along the middle portion of the cannula tube (274). The bell-shaped hub (272), the elongated cylindrical tube (274), the angled cannula tip (276), the working channel (264), and the annular ribs (278) may be substantially similar to the bell-shaped hub (222), the elongated cylindrical tube (224), the angled cannula tip (226), the working channel (214), and the annular ribs (228), wherein the differences are described in detail below.

[0076] The balancing feature (285) includes a thinner proximal section (280), a thicker distal section (282), and a transition section (284); each of these can be substantially similar to the aforementioned thinner proximal section (230), thicker distal section (232), and transition section (234), the differences of which are detailed herein. Thus, the bell hub (272) is connected to the tube (274) via a coupling (286), and the wall thickness of the thinner section (280) defined by the tube (274) is determined by the distance between the inner surface (290) of the tube (274) and the proximal outer surface (292) of the tube (274). Furthermore, the wall thickness of the thicker section (282) is determined by the distance between the inner surface (290) of the tube (274) and (A) a portion of the distal outer surface (294) of the tube (274) or (B) a portion of the annular rib (278).

[0077] As described above, the balancing feature (285) includes a greater difference in mass and resulting weight between the proximal thinner segment (280) and the distal thicker segment (282), causing the center of gravity (CG3) to shift further distally. In the current example, this is achieved by having a distal thicker segment (282) that is larger in both length and wall thickness compared to the proximal thinner segment (280). Therefore, it should be understood that the geometry of the cannula (270) can be modified to adjust the center of gravity (CG3) to a desired position along the cannula (274) to provide optimal balance of the cannula (270) by minimizing the fulcrum force and resulting torque exerted on the portion of the cannula (274) that engages the abdominal wall (3) due to the weight of the cannula (270).

[0078] As will be apparent to those skilled in the art, the thinner proximal segment (230, 280) and the thicker distal segment (232, 282) can have any suitable dimensions as taught herein. Furthermore, as will be apparent to those skilled in the art, the thinner proximal segment (230, 280) and the thicker distal segment (232, 282) can form any suitable wall thickness ratio as taught herein. For example, the thinner proximal segment (230, 280) can have a wall thickness of 0.020 inches, while the thicker distal segment (232, 282) can have a wall thickness of 0.042 inches, resulting in a wall thickness ratio of 0.47619. For example, the thinner proximal section (230, 280) could have a wall thickness of 0.010 inches, while the thicker distal section (232, 282) could have a wall thickness of 0.045 inches, resulting in a wall thickness ratio of 0.2222. Other suitable wall thickness ratios include, but are not limited to, 1:2, 1:4, 1:5, etc.

[0079] III. Exemplary Combinations

[0080] The following examples illustrate various non-exhaustive ways in which the teachings herein can be combined or applied. It should be understood that the following examples are not intended to limit the scope of any claims that may be provided at any time in this patent application or a subsequent filing thereof. No disclaimer is intended. The following examples are provided merely for illustrative purposes. It is contemplated that the various teachings herein may be arranged and applied in a variety of other ways. It is also contemplated that some variations may omit certain features mentioned in the following examples. Therefore, none of the aspects or features mentioned below should be considered definitive unless otherwise expressly indicated, for example, by the inventor or a successor of the inventor of interest, at a later date. If any claim set forth in this patent application or a subsequent filing related to this patent application includes additional features beyond those mentioned below, such additional features should not be presumed to have been added for any reason related to patentability.

[0081] Example 1

[0082] A surgical interventional device assembly includes: (a) a cannula hub; and (b) a cannula portion extending distally from the cannula hub along a longitudinal axis, wherein the cannula portion defines a working channel configured to guide surgical instruments along the longitudinal axis of the cannula portion, wherein the cannula portion includes: (i) a tissue engagement feature disposed along an outer surface of the cannula portion, wherein the tissue engagement feature is configured to stabilize the cannula portion and the cannula hub relative to the body cavity wall when the cannula portion is inserted distally through a patient's body cavity wall, and (ii) A balancing feature, configured to enhance the lateral stability of the cannula portion and the cannula hub relative to the patient's body cavity wall, wherein the balancing feature includes: (A) a proximal portion of the cannula portion having a first wall thickness, wherein at least a portion of the proximal portion is disposed proximal to the tissue junction feature, and (B) a distal portion of the cannula portion having a second wall thickness, wherein the second wall thickness of the distal portion is greater than the first wall thickness of the proximal portion, wherein at least a portion of the distal portion is disposed distal to the tissue junction feature.

[0083] Example 2

[0084] According to the surgical interventional device of Embodiment 1, the cannula includes an inner surface defining the working channel, wherein the inner surface extends from the proximal portion to the distal portion, and wherein the inner surface includes a uniform inner diameter extending between the proximal portion and the distal portion.

[0085] Example 3

[0086] According to one or more of the surgical interventional devices described in Embodiments 1 to 2, the balancing feature includes a transition portion located between the proximal portion and the distal portion, wherein the transition portion coincides with the proximal end of the tissue engagement feature.

[0087] Example 4

[0088] According to any one or more of the surgical interventional devices described in Embodiments 1 to 3, the tissue engagement feature includes a tissue engagement rib, the tissue engagement rib including a shoulder portion and a tapered portion connected to each other at their outer edges.

[0089] Example 5

[0090] According to the surgical intervention device of Embodiment 4, the proximal portion includes a proximal outer surface, the distal portion includes a distal outer surface, and the proximal outer surface is closer to the working channel than the distal outer surface.

[0091] Example 6

[0092] According to the surgical interventional device of Embodiment 5, the distal outer surface is closer to the working channel than the outer edge of the tissue-jointing rib.

[0093] Example 7

[0094] According to any one or more of the surgical interventional devices described in Embodiments 1 to 6, the cannula hub includes a bell-shaped body sized to accommodate a disposable sealing assembly.

[0095] Example 8

[0096] According to the surgical interventional device of Embodiment 7, the cannula hub further includes a distal rod connected to the proximal portion of the cannula.

[0097] Example 9

[0098] The surgical interventional device according to any one or more of Embodiments 1 to 8, wherein the surgical interventional device is formed of surgical steel.

[0099] Example 10

[0100] According to any one or more of the surgical interventional devices described in Embodiments 1 to 9, the cannula terminates at an angled cannula tip.

[0101] Example 11

[0102] According to one or more of the surgical interventional devices described in Examples 1 to 10, the tissue engagement feature includes a plurality of tissue engagement ribs extending along a segment of the distal portion.

[0103] Example 12

[0104] According to the surgical interventional device of Embodiment 11, the plurality of tissue-jointing ribs terminate distally relative to the proximal portion of the cannula.

[0105] Example 13

[0106] The surgical interventional device according to any one or more of Embodiments 1 to 12 further includes an occluder, wherein the occluder is configured to be removably coupled to the cannula along the longitudinal axis to facilitate insertion of the surgical interventional device through the patient's body wall.

[0107] Example 14

[0108] According to any one or more of the surgical interventional devices described in Embodiments 1 to 13, the cannula hub is configured to selectively engage with a sealing assembly.

[0109] Example 15

[0110] The surgical interventional device according to any one or more of Embodiments 1 to 14, wherein the proximal portion and the distal portion define a wall thickness ratio of 1:2.

[0111] Example 16

[0112] A surgical interventional device assembly includes: (a) a cannula hub; and (b) a cannula portion extending distally from the cannula hub along a longitudinal axis, wherein the cannula portion defines a working channel configured to guide a surgical instrument along the longitudinal axis of the cannula portion, wherein the cannula portion includes: (i) a proximal portion of the cannula portion having a first wall thickness; (ii) a tissue engagement feature disposed along an outer surface of the cannula portion, wherein the tissue engagement feature is configured to stabilize the cannula portion and the cannula hub relative to the body cavity wall when the cannula portion is inserted distally through a patient's body cavity wall; and (iii) a distal portion of the cannula portion having a second wall thickness, wherein the tissue engagement feature is interposed between the proximal portion and the distal portion, wherein the second wall thickness of the distal portion is greater than the first wall thickness of the proximal portion.

[0113] Example 17

[0114] According to the surgical intervention device of Embodiment 16, the tissue engagement feature includes a plurality of tissue engagement ribs.

[0115] Example 18

[0116] According to the surgical interventional device of Embodiment 16, the maximum wall thickness of the tissue joining rib is greater than the second wall thickness of the distal portion.

[0117] Example 19

[0118] According to one or more of the surgical interventional devices described in Examples 16 to 18, the cannula hub includes a bell-shaped body.

[0119] Example 20

[0120] A surgical interventional device assembly includes: (a) a cannula hub; and (b) a cannula portion extending distally from the cannula hub along a longitudinal axis, wherein an inner surface of the cannula portion defines a working channel configured to guide a surgical instrument along the longitudinal axis of the cannula portion, wherein the cannula portion includes: (i) a proximal portion of the cannula portion including a first wall thickness defined by the inner surface and a proximal outer surface, and (ii) a distal portion of the cannula portion including a second wall thickness defined by the inner surface and a distal outer surface, wherein the distal portion terminates in a distal end of an opening, wherein the second wall thickness of the distal portion is greater than the first wall thickness of the proximal portion.

[0121] IV. Miscellaneous

[0122] It should be understood 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. Therefore, the foregoing teachings, expressions, embodiments, examples, etc., should not be considered in isolation from each other. Various suitable ways in which the teachings herein can be combined will be apparent to those skilled in the art. Such modifications and variations are intended to be included within the scope of the claims.

[0123] Furthermore, any one or more of the teachings herein may be combined with any one or more of the teachings disclosed in the following patent applications: U.S. Patent Application No. END9247USNP1, filed on the same date as this application, entitled “Pinch-To-Release Cannula Depth Limiter”; U.S. Patent Application No. END9247USNP2, filed on the same date as this application, entitled “Multi-Diameter Cannula Depth Limiter”; U.S. Patent Application No. END9247USNP3, filed on the same date as this application, entitled “Pinch-To-Clamp Cannula Depth Limiter”; U.S. Patent Application No. END9247USNP4, filed on the same date as this application, entitled “Universal Size Multi-Walled Elastomer Cannula Depth Limiter”; and U.S. Patent Application No. END9247USNP4, filed on the same date as this application, entitled “Threaded Cannula Depth Limiter”. The following U.S. patent applications were filed on the same date as this application: "Tilting Tang Cannula Depth Limiter" [Attorney Reference No. END9247USNP5]; "Two Piece Separable Obturator" [Attorney Reference No. END9247USNP7]; "Latchless Obturator with Interference Fit Feature" [Attorney Reference No. END9247USNP8]; "Airflow Channels and Patterns in Lumen for Cannula" [Attorney Reference No. END9247USNP10]; and / or "Stabilizer for Surgical Shafts or Cannulas" [Attorney Reference No. END9247USNP11]. The disclosure of each of these patent applications is incorporated herein by reference.

[0124] It should be understood that any patent, patent publication, or other public material allegedly incorporated herein by reference, whether in whole or in part, is incorporated only to the extent that the incorporated material does not conflict with any existing definitions, statements, or other public material set forth in this disclosure. Therefore, and to the extent necessary, the disclosures expressly listed herein replace any conflicting material incorporated herein by reference. Any material, or part thereof, allegedly incorporated herein by reference that conflicts with any existing definitions, statements, or other public material set forth herein will be incorporated only to the extent that the incorporated material does not conflict with any existing public material.

[0125] The aforementioned devices can be applied to both traditional medical treatments and surgeries performed by medical professionals and robot-assisted medical treatments and surgeries. By way of example only, the various teachings herein can be readily incorporated into robotic surgical systems, such as the DAVINCI system from Intuitive Surgical, Inc. (Sunnyvale, California). TMSystem. Similarly, those skilled in the art will recognize that the various teachings herein can be readily combined with the teachings of any of the following patents: U.S. Patent 5,792,135, entitled “Articulated Surgical Instrument For Performing Minimally Invasive Surgery With Enhanced Dexterity and Sensitivity,” published August 11, 1998, the disclosure of which is incorporated herein by reference; U.S. Patent 8,783,541, entitled “Robotically-Controlled Surgical End Effector System,” published July 22, 2014, the disclosure of which is incorporated herein by reference; U.S. Patent 8,479,969, entitled “Drive Interface for Operably Coupling a Manipulatable Surgical Tool to a Robot,” published July 9, 2013; and U.S. Patent 8,479,969, entitled “Robotically-Controlled Cable-Based Surgical End…”, published August 12, 2014. U.S. Patent 8,800,838, entitled “Effectors”, the disclosures of which are incorporated herein by reference; and / or U.S. Patent 8,573,465, entitled “Robotically-Controlled Surgical End Effector System with Rotary Actuated Closure Systems”, published on November 5, 2013, the disclosures of which are incorporated herein by reference.

[0126] The devices of the types described above may be designed to be disposable after a single use, or they may be designed to be reusable. In either or both cases, these types may be repaired for reuse after at least one use. Repair may include any combination of the following steps: disassembling the device, then cleaning or replacing specific parts, and subsequently reassembling. Specifically, some types of devices may be disassembled, and any combination may be used to selectively replace or remove any number of specific parts or portions of the device. While cleaning and / or replacing specific components, some types of devices may be reassembled at a repair facility or by the user prior to surgery for subsequent use. Those skilled in the art will appreciate that device repair can utilize a variety of techniques for disassembly, cleaning / replacement, and reassembly. The use of such techniques and the resulting repaired devices are within the scope of this application.

[0127] By way of example only, the types described herein can be sterilized before and / or after surgery. In one sterilization technique, the device is placed in a closed and sealed container such as a plastic bag or a TYVEK bag. The container and device can then be placed in a radiation field that can penetrate the container, such as gamma radiation, X-rays, or high-energy electrons. The radiation kills bacteria on the device and in the container. The sterilized device can then be stored in a sterile container for later use. Any other techniques known in the art can also be used to sterilize the device, including but not limited to beta or gamma radiation, ethylene oxide, or vapor.

[0128] Various embodiments of the invention have been shown and described, and further improvements to the methods and systems described herein can be achieved by suitable modifications made by those skilled in the art without departing from the scope of the invention. Several such possible modifications have been mentioned, and other modifications will be apparent to those skilled in the art. For example, the embodiments, implementations, geometries, materials, dimensions, ratios, steps, etc., discussed above are illustrative and not essential. Therefore, the scope of the invention should be considered in accordance with the following claims and should be understood as not being limited to the details of the structures and operations shown and described in the specification and drawings.

Claims

1. A surgical interventional device, comprising: (a) Insertion hub; and (b) A cannula portion extending distally from the cannula hub along a longitudinal axis, wherein the cannula portion defines a working channel configured to guide surgical instruments along the longitudinal axis of the cannula portion, wherein the cannula portion includes: (i) A tissue engagement feature disposed along the outer surface of the cannula portion, wherein the tissue engagement feature is configured to stabilize the cannula portion and the cannula hub relative to the body cavity wall when the cannula portion is inserted distally through the patient's body cavity wall, and (ii) a balancing feature configured to enhance the lateral stability of the cannula portion and the cannula hub relative to the patient's body cavity wall, wherein... The balance feature includes: (A) The proximal portion of the cannula, the proximal portion having a first wall thickness, wherein at least a portion of the proximal portion is disposed proximal to the tissue junction feature, and (B) The distal portion of the cannula, the distal portion having a second wall thickness, wherein the second wall thickness of the distal portion is greater than the first wall thickness of the proximal portion, wherein at least a portion of the distal portion is disposed distal to the tissue junction feature.

2. The surgical interventional device according to claim 1, wherein, The cannula portion includes an inner surface defining the working channel, wherein the inner surface extends from the proximal portion to the distal portion, and wherein the inner surface includes a uniform inner diameter extending between the proximal portion and the distal portion.

3. The surgical interventional device according to claim 1, wherein, The balancing feature includes a transition portion located between the proximal portion and the distal portion, wherein the transition portion coincides with the proximal end of the tissue-jointing feature.

4. The surgical interventional device according to claim 1, wherein, The tissue joining feature includes tissue joining ribs, which include a shoulder portion and a tapered portion that are joined to each other at the outer edge.

5. The surgical interventional device according to claim 4, wherein, The proximal portion includes a proximal outer surface, wherein the distal portion includes a distal outer surface, wherein the proximal outer surface is closer to the working channel than the distal outer surface.

6. The surgical interventional device according to claim 5, wherein, The distal outer surface is closer to the working channel than the outer edge of the tissue-jointing rib.

7. The surgical interventional device according to claim 1, wherein, The insertion hub includes a bell-shaped body sized to accommodate a disposable sealing assembly.

8. The surgical interventional device according to claim 7, wherein, The cannula hub also includes a distal rod that is connected to the proximal portion of the cannula.

9. The surgical interventional device according to claim 1, wherein, The surgical intervention device is made of surgical steel.

10. The surgical interventional device according to claim 1, wherein, The cannula terminates at an angled tip.

11. The surgical interventional device according to claim 1, wherein, The tissue-jointing feature includes a plurality of tissue-jointing ribs extending along a segment of the distal portion.

12. The surgical interventional device according to claim 11, wherein, The plurality of tissue-jointing ribs terminate distally relative to the proximal portion of the cannula.

13. The surgical interventional device according to claim 1, further comprising an occluder, wherein, The occluder is configured to be removably coupled to the cannula along the longitudinal axis to facilitate insertion of the surgical interventional device through the patient's body wall.

14. The surgical interventional device according to claim 1, wherein, The insertion hub is configured to selectively engage with the sealing assembly.

15. The surgical interventional device according to claim 1, wherein, The proximal portion and the distal portion define a wall thickness ratio of 1:2.

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