Two-piece separable slug

Abstract

The present invention provides a surgical interventional device comprising: an occluder head; an elongated shaft extending distally from the occluder head along a longitudinal axis; and an occluder tip. The occluder tip includes a reusable portion and a replaceable tip. The reusable portion is attached to a distal portion of the elongated shaft such that the reusable portion is configured to be sterilized together with the elongated shaft. The replaceable tip includes a tapered distal tip and a proximal connecting body. The tapered distal tip is configured to facilitate insertion of the surgical interventional device through the patient's body wall. The proximal connecting body is configured to selectively engage with the reusable portion. The replaceable tip is generally movable relative to the reusable portion along a mating path to engage the proximal connecting body with the reusable portion. The mating path extends laterally relative to the longitudinal axis.

Description

[0001] priority

[0002] This patent application claims priority to Indian Provisional Patent Application 2020 / 11018667 entitled “Two-Piece Separable Obturator”, filed on May 1, 2020. 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 6A A perspective view of another exemplary trocar is shown, having a cannula assembly and an occluder assembly shown in a disassembled state, the occluder assembly having a replaceable tip assembly shown in a disassembled state.

[0016] Figure 6B It shows Figure 6A A perspective view of the cannula, in which the cannula assembly and occluder assembly are disassembled, and the replaceable tip assembly is assembled.

[0017] Figure 6C It shows Figure 6A A perspective view of the cannula, showing the cannula assembly and the occluder assembly in an assembled state;

[0018] Figure 7A It shows Figure 6A An enlarged perspective view of the replaceable tip assembly, in which the replaceable tip assembly is disassembled;

[0019] Figure 7BIt shows Figure 6A An enlarged perspective view of the replaceable tip assembly, in which the replaceable tip assembly is in an assembled state;

[0020] Figure 8 It shows Figure 6A An enlarged cross-sectional view of the cannula, showing the direction along... Figure 6C The distal end of the cannula needle is cut from line 8-8.

[0021] Figure 9 It shows along Figure 6C The line 9-9 was cut off Figure 6A A cross-sectional view of the cannula;

[0022] Figure 10A An enlarged perspective view of an alternative replaceable tip assembly is shown, in which the replaceable tip assembly is disassembled;

[0023] Figure 10B It shows Figure 10A An enlarged perspective view of the replaceable tip assembly, in which the replaceable tip assembly is in an assembled state;

[0024] Figure 11A An enlarged perspective view of a replaceable tip assembly with a replaceable stopper tip and a reusable portion is shown, wherein the reusable portion also includes a tubular body and a sliding drawer, wherein the replaceable stopper tip is detached from the sliding drawer, wherein the sliding drawer is in the extended position.

[0025] Figure 11B It shows Figure 11A An enlarged perspective view of the replaceable tip assembly, wherein the replaceable stopper tip is assembled with a sliding drawer, wherein the sliding drawer is in the extended position;

[0026] Figure 11C It shows Figure 11A An enlarged perspective view of the replaceable tip assembly, wherein the replaceable stopper tip is assembled with a sliding drawer, wherein the sliding drawer is in the retracted position; and

[0027] Figure 12 It shows Figure 11A An enlarged exploded view of the reusable portion of the replaceable tip component.

[0028] 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

[0029] 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.

[0030] 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.

[0031] 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.

[0032] I. Exemplary single-use cannulas and reusable cannulas

[0033] 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.

[0034] A. An exemplary single-use cannula

[0035] 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).

[0036] 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 (22) includes a plurality of tissue gripping features in the form of annular ribs (26) axially arranged along the middle portion of the cannula (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.

[0037] 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 (22) may include tissue gripping features in the form of one or more spiral ribs that extend around at least a middle portion of the cannula (22) and may be fan-shaped similar to ribs (26).

[0038] 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 (22), such that the distal shield (40) is a component of the cannula (20).

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] B. Exemplary deployment of the cannula near the patient's abdominal cavity

[0044] 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.

[0045] 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, 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.

[0046] C. An exemplary reusable cannula with a disposable sealing assembly

[0047] 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.

[0048] 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 (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.

[0049] 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).

[0050] 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.

[0051] 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).

[0052] 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.

[0053] II. An exemplary occluder having multiple components

[0054] As described above, when the occluder (16, 116) is properly received within the cannulation assembly (12, 112), the occluder tip (64, 154) is configured to be pushed inward against the skin (3) through the various layers forming the patient's abdominal wall (2), such that the occluder tip (64, 154) and the cannulation tip (24, 126) are appropriately approached to the abdominal cavity (1). In some cases, the occluder tip (64, 154) may comprise a "bladeless tip" occluder. A "bladeless tip" occluder includes a tip geometry that is sharp enough, but not too sharp, to allow for non-invasive, yet easily accessible tissue diffusion of the patient's abdominal wall (2) during approach of the cannula (10, 110) as described above.

[0055] As also mentioned above, in some cases it may be desirable to construct the cannula such that one or more of its components can be sterilized and reused for multiple surgical procedures, while one or more other components can be (A) easily and economically discarded and replaced after each procedure, and / or (B) sterilized and reused for a second, smaller number of procedures. Therefore, the cannulas (12, 120) and occluders (16, 116) can be made of robust materials such as surgical steel, allowing them to be sterilized and reused for multiple surgical procedures.

[0056] However, in cases where the occluder (16, 116) is configured to be sterilized and reused, after multiple uses as described herein, the tip geometry of the occluder tip (64, 154) may eventually deviate from its intended dimensions due to wear, degradation, damage, etc. This deviation in the tip geometry of the occluder tip (64, 154) may be undesirable because, according to the teachings herein, the occluder tip (64, 154) may no longer be sharp enough that the cannula (10, 110) cannot properly approach the abdominal cavity (1) via a non-invasive, yet easily accessible, tissue diffusion method. Therefore, it may be desirable to have an occluder that includes a replaceable occluder tip configured to be eventually discarded and replaced, while the other parts of the occluder can be sterilized and reused multiple times thereafter.

[0057] Figures 6A to 6C An alternative cannula (210) is shown that can be used to replace the aforementioned cannulas (10, 110). The cannula (210) includes an insertion assembly (212) defining a working channel (214) and an occluder (216) configured to be removably and coaxially inserted into the working channel (214) such that, as described herein, the assembled cannula (210) can be guided distally through the patient's abdominal wall (2) and approach the abdominal cavity (1).

[0058] As will be described in more detail below, the occluder (216) includes a replaceable tip assembly (300) having a reusable portion (302) and a replaceable occluder tip (310). As will be described in more detail below, the replaceable occluder tip (310) can be selectively replaced with a new occluder tip (310) to ensure an appropriate tip geometry for non-invasive, yet easy-to-use tissue diffusion in accordance with the teachings herein. Thus, the reusable portion (302) and the remainder of the occluder (216) can be sterilized and reused for multiple surgical procedures, while a new occluder tip (310) can be readily incorporated to ensure an appropriate tip geometry.

[0059] The cannulation assembly (212) may be substantially similar to any of the cannulation assemblies (12, 112) described above. The cannulation assembly (212) includes a cannula (220) and a sealing housing (230), which together define a working channel (214). The cannula (220) and the sealing housing (230) may be substantially similar to (A) the cannula (20) and the sealing housing (30), or substantially similar to (B) the cannula (120) and the sealing assembly (130), respectively. In other words, the cannula (220) may be configured to be used for single-use or multiple-use purposes; and the sealing assembly (230) may be configured to be partially attached to the cannula (220) or configured as a replaceable unit.

[0060] The cannula (220) includes an elongated central channel (222), an angled cannula tip (224), and multiple annular ribs (226); these may be similar to the elongated central channel (22, 124), the angled cannula tip (24, 126), and the annular ribs (26, 128) described above, respectively.

[0061] The sealing housing (230) houses a pair of sealing structures defining a sealing assembly configured to maintain airflow into the patient's abdominal cavity while allowing surgical instruments and tissue debris to pass through the working channel (214). Additionally, the cannulation assembly (212) includes an airflow port (250), which may be substantially similar to the airflow ports (50, 140) described above. Thus, the airflow port (250) is configured to guide airflow fluid, such as carbon dioxide, from a fluid source (not shown) distally through the working channel (214) and toward the patient's abdominal cavity, thereby expanding (or "airflowing") the cavity with fluid. This expansion of the abdominal cavity creates additional space for easier performance of laparoscopic surgical procedures.

[0062] like Figures 6A to 6BAs shown, the occluder (216) of the cannula (210) includes a proximal head (260) and an elongated cylindrical shaft (262) extending distally from the head (260); they are substantially similar to the proximal head (60) and elongated cylindrical shaft (262) described above, but with differences detailed below. Additionally, the occluder (216) includes a replaceable tip assembly (300) located at the distal end of the elongated cylindrical shaft (262).

[0063] The occluder head (260) includes a dome-shaped upper body (266), a base plate (268), and an actuable latching member (270) comprising a pair of latching arms (272) and a corresponding pair of latching buttons (274). The latching arms (272) are configured to be engaged within corresponding slots (238) formed in the top surface of the sealing housing (230) to connect the occluder (216) to the cannulation assembly (212). The latching buttons (274) are actuable to release the latching arms (272) from the slots, thereby allowing the occluder (216) to separate from the cannulation assembly (212). Although not shown, the occluder (216) may also include a central channel (not shown) similar to the central channel (76) described above, which extends longitudinally through the occluder head (260) and the occluder axis (262) and is configured to receive an endoscope (not shown) therein to provide visualization during insertion of a cannula (210) through the patient's abdominal wall. In such cases, a clamping rod (not shown) of the occluder head (260) may pivot to selectively secure the endoscope within the central channel (not shown). Of course, the central channel (not shown) and the clamping rod (not shown) are merely optional features and may be omitted from the occluder (216) in other forms.

[0064] As stated above, and as Figures 7A to 9 As best shown, the replaceable tip assembly (300) includes a reusable portion (302) and a replaceable occluder tip (310). Also as described above, and as will be described in more detail below, the replaceable occluder tip (310) can be selectively engaged and disengaged from the reusable portion (302) to replace a used occluder tip (310) with a new occluder tip (310).

[0065] A reusable portion (302) is secured at the distal end of an elongated cylindrical shaft (262). The reusable portion (302) includes a key post (304) and a pair of transverse snap-fit ​​ribs (305) extending laterally from the corresponding side of the key post (304). The key post (304) also includes a proximal narrow portion (306) that extends into a distal wide portion (308). As will be described in more detail below, the key post (304) and the transverse snap-fit ​​ribs (305) are configured to selectively engage a replaceable occluder tip (310) with the elongated cylindrical shaft (262).

[0066] The reusable portion (302) is configured to be sterilized and reused in multiple surgical procedures. Based on the teachings herein, the reusable portion (302) can be formed of any suitable material, such as surgical steel, which will be apparent to those skilled in the art. In some examples, the reusable portion (302) may be formed of the same material as the elongated cylindrical shaft (262). Alternatively, the reusable portion (302) may be formed of another suitable material different from the material used to form the elongated cylindrical shaft (262).

[0067] The replaceable occluder tip (310) includes a connecting body (312) and a tapered distal tip (320) attached to the connecting body (312). The tapered distal tip (320) comprises a suitable tip geometry that is sharp enough, but not too sharp, to allow for non-invasive, easy tissue diffusion of the patient's abdominal wall (2) when the replaceable tip assembly (300) is properly assembled as described herein. The tapered distal tip (320) can be configured to be used for a single use (or a predetermined number of multiple uses) such that, after surgical procedures, the occluder tip (310) is removed, the reusable portion (302) and the remainder of the occluder (216) are disinfected, and a new occluder tip (310) is attached to the reusable portion (302) as described herein. Thus, undesirable deviations in the tip geometry can be prevented from being used extensively, as described herein. Based on the teachings herein, the replaceable occluder tip (310) can be formed of any suitable material, as will be apparent to those skilled in the art. For example, the replaceable occluder tip (310) can be formed of any suitable plastic, any suitable metal, any suitable alloy, etc.

[0068] The coupling body (312) includes a plurality of internal ribs (316) and a plurality of gripping features (318). The gripping features (318) extend from the outer surface of the coupling body (312). As described herein, the gripping features (318) assist an operator in properly gripping the coupling body (312) to engage and disengage the replaceable occluder tip (310) from the reusable portion (302). While in the present example, the gripping features (318) include a plurality of longitudinally extending protrusions, any other suitable gripping features and / or geometry may be used in accordance with the teachings herein, as will be apparent to those skilled in the art.

[0069] The outer surface and internal ribs (316) of the connecting body (312) define complementary keyholes (314). Additionally, as... Figure 7A and Figure 9 As best seen in the middle, the outer surface of the defining complementary keyhole (314) of the connecting body (312) includes a pair of outward-facing snap-fit ​​surfaces (315) and a pair of inward-facing snap-fit ​​surfaces (315).

[0070] like Figure 6A and Figure 7A As best shown, the complementary keyhole (314) is sized to receive the keypost (304) along the insertion path (P1). Specifically, as Figures 6A to 6B and Figures 7A to 7B As shown, when the complementary keyhole (314) and keypost (304) are properly aligned, the operator may advance the replaceable occluder tip (310) and / or keypost (304) toward each other along the insertion path (P1) such that the keypost (304) is properly received within the keyhole (314). Although in the present example the insertion path (P1) is perpendicular (or “transverse”) to the longitudinal central axis of the cannula (210), this is merely optional. In some cases, the keypost (304) and keyhole (314) may be configured to be connected along an insertion path that is inclined relative to the central axis of the cannula (210). In other words, from the perspective of a two-dimensional plane containing both the central axis and the axis along which the insertion path (P1) extends, the insertion path (P1) may extend along an axis that only traverses or extends through the central axis of the cannula (210).

[0071] Furthermore, the transverse snap-fit ​​rib (305) is sized to interact with the opposite outward-facing snap-fit ​​surface (315) of the connecting body (312), such that when the key post (304) is inserted into the complementary keyhole (314), the rib (305) abuts against the outward-facing snap-fit ​​surface (315) to provide a snap-fit ​​connection. The portion of the outer surface forming the snap-fit ​​surface (315) and / or the rib (305) can have sufficient elasticity to allow for slight deformation as the key post (304) approaches the keyhole (314). Figure 9 As best illustrated, once the key post (304) is fully inserted into the complementary keyhole (314), portions of the outer surface forming the snap-fit ​​surface (315) and / or rib (305) elastically return to their undeformed position, allowing the rib (305) to be accommodated within the keyhole (314), adjacent to the inwardly facing snap-fit ​​surface (315). The snap-fit ​​rib (305) and surface (315) provide tactile feedback to the operator to confirm proper engagement of the reusable portion (302) with the replaceable occluder tip (310).

[0072] like Figures 6B to 6C As best illustrated herein, with the replaceable occluder tip (310) properly engaged with the reusable portion (302) and the remainder of the occluder (216), the operator can properly insert the occluder (216) into the working channel (214) of the cannulation assembly (212). The occluder shaft (262) is configured to be received within the working channel (214) of the cannulation assembly (212) such that the tapered distal tip (320) of the replaceable occluder tip (312) extends distally through the cannulation tip (224). With the cannula (210) fully assembled, the operator can use the cannula (210) in accordance with the teachings herein.

[0073] like Figures 8 to 9 As best illustrated, when the keypost (304) of the reusable portion (302) is properly inserted into the keyhole (314) of the replaceable occluder tip (310), the complementary geometries of the keypost (304) and the keyhole (314) are configured to prevent the occluder tip (310) from moving relative to the reusable portion (302) in all directions not parallel to the insertion path (P1). For example, as described above, the connection between the replaceable occluder tip (310) and the occluder shaft (262) effectively resists movement of the occluder tip (310) relative to the occluder shaft (262) in the longitudinal direction along the occluder shaft (262) in response to axial forces. This connection also effectively resists rotational movement of the occluder tip (310) relative to the occluder shaft (262) about the longitudinal axis in response to torsional forces; for example, when the occluder tip (310) is combined with the above... Figures 3A to 3BWhen the method described is to advance distally through the patient's abdominal wall (2).

[0074] like Figure 9 As best shown, the snap-fit ​​rib (305) and the inwardly facing snap-fit ​​surface (315) can abut against each other to prevent the key post (304) from unintentionally leaving the keyhole (314) along the insertion path (P1).

[0075] The sidewalls of the narrow portion (306) that contact the inner rib (316) may have a slight taper, such that the end of the narrow portion (306) adjacent to the outer surface of the connecting body (312) is wider than the end of the narrow portion (306) that is received in the keyhole (314). When the key post (304) is properly inserted into the keyhole (314), the slight taper of the narrow portion (306) allows the sidewalls of the narrow portion (306) to abut against the inner rib (316), thereby preventing the key post (304) from being accidentally over-inserted into the keyhole (314).

[0076] Additionally, when the cannula (210) is assembled, the keypost (304) and keyhole (314) are properly accommodated within the working channel (214) of the cannula (220), such that the inner wall of the cannula (220) also helps maintain alignment between the replaceable occluder tip (310) and the reusable portion (302). In other words, when the cannula (210) is properly assembled for use as described herein, the inner wall of the cannula (220) helps prevent (A) the keypost (304) from leaving the keyhole (314) along the insertion path (P1), and (B) the keypost (304) from over-inserting into the keyhole (314). Therefore, in some cases, the snap-fit ​​surface (315) and snap-fit ​​rib (305) can be omitted. Furthermore, in some cases, the slight taper of the narrow portion (306) can be omitted to prevent accidental over-insertion.

[0077] After using the occluder (216) as described herein, the operator can remove the replaceable occluder tip (310) from the reusable portion (302) by actuating the key post (304) from the keyhole (314) with sufficient force along the insertion path (P1) to overcome the snap-fit ​​connection between the snap-fit ​​rib (305) and the inwardly facing snap-fit ​​surface (315). The operator can then discard the used replaceable occluder tip (310), disinfect the rest of the occluder (216), and attach a new occluder tip (310) to the disinfected reusable portion (302) in preparation for another surgical procedure.

[0078] In the current example, the proximal narrow portion (306) comprises a rectangular cross-sectional geometry, while the distal wide portion (308) comprises a circular cross-sectional geometry. However, it should be understood that the key post (304) may have any suitable geometry in accordance with the teachings herein, as will be apparent to those skilled in the art. For example, the key post (304) may comprise a dovetail geometry that widens as the key post (304) extends distally from the elongated cylindrical axis (262). As another example, the key post (304) may comprise an undulating surface.

[0079] In the current example, the reusable portion (302) includes a convex connection portion (i.e., a key post (304)), while the replaceable occluder tip (310) includes a concave connection portion (i.e., a keyhole (314)). However, this is merely optional, as the reusable portion (302) may include a concave connection portion, while the replaceable occluder tip (310) may include a convex connection portion.

[0080] Figures 10A to 10B Another exemplary replaceable tip assembly (330) is shown that can be easily incorporated into the occluder (216) to replace the aforementioned replaceable tip assembly (300). The replaceable tip assembly (330) includes a reusable portion (332) and a replaceable occluder tip (340). As will be described in more detail below, the replaceable occluder tip (340) can be selectively engaged and disengaged from the reusable portion (332) to replace a used occluder tip (340) with a new occluder tip (340).

[0081] The reusable portion (332) can be fixed at the distal end of the elongated cylindrical shaft (262). The reusable portion (332) includes a cylindrical body that defines an internal channel extending between the distal end of the opening (336) and a pair of transverse cutouts (338).

[0082] Similar to the reusable portion (302) described above, the reusable portion (332) is configured to be sterilized and reused in multiple surgical procedures. As taught herein, the reusable portion (332) can be formed from any suitable material, such as surgical steel, which will be apparent to those skilled in the art. In some examples, the reusable portion (332) may be formed from the same material as the elongated cylindrical shaft (262). Alternatively, the reusable portion (332) may be formed from another suitable material different from the material used to form the elongated cylindrical shaft (262).

[0083] The replaceable occluder tip (340) includes a connecting body (342) and a tapered distal tip (346) attached to the connecting body (342). The tapered distal tip (346) comprises a suitable tip geometry that is sharp enough, but not too sharp, to allow for non-invasive, easy tissue diffusion of the patient's abdominal wall (2) when the replaceable tip assembly (330) is properly assembled as described herein. The tapered distal tip (346) can be configured to be used for a single use (or a predetermined number of multiple uses) such that, after surgical procedures, the occluder tip (340) is removed, the reusable portion (332) and the remainder of the occluder (216) are disinfected, and a new occluder tip (340) is attached to the reusable portion (332) as described herein. Thus, undesirable deviations in the tip geometry can be prevented from being used extensively, as described herein.

[0084] The connecting body (342) includes a pair of resilient latches (344) extending proximally. As in Figures 10A to 10B As best seen, the resilient latch (344) is configured to bend inward upon insertion into the distal end (336) of the opening due to contact between the resilient latch (344) and the inner surface of the cylindrical body of the reusable portion (332). Once the proximal end of the resilient latch (344) is properly aligned with the transverse cut (338), the resilient latch (344) may bend laterally outward due to no longer being in proper contact with the inner surface of the reusable portion (332). Figure 10B As shown, the distal shoulder of each resilient latch (344) abuts against a portion of the corresponding transverse cut (338), thereby preventing the replaceable occluder tip (340) from disengaging from the reusable portion (332). In other words, the resilient latch (344) and the transverse cut (338) secure the occluder tip (340) to the reusable portion (332).

[0085] Additionally, the proximal shoulder of the connecting body (342) can abut against the distal end of the defined opening of the reusable portion (332), thereby preventing the replaceable tip (340) from translating proximally beyond... Figure 10B The location shown.

[0086] With the replaceable occluder tip (340) properly connected to the reusable portion (332) and the rest of the occluder (216), the operator can properly insert the occluder (216) into the working channel (214) of the cannulation assembly (212) so that the operator can use the cannula (210) in accordance with the teachings herein.

[0087] After using the occluder (216) as described herein, the operator can remove the replaceable occluder tip (340) from the reusable portion (332) by inwardly actuating the two resilient latches (334) so ​​that the distally facing shoulders of the resilient latches (334) are no longer abutting against the reusable portion (332) defining the transverse cut (338). Any suitable tool can be used to inwardly actuate the resilient latches (334) in accordance with the teachings herein, as will be apparent to those skilled in the art. Simultaneously, the operator can pull the replaceable tip (340) distally so that the resilient latches (334) engage the inner surface of the reusable portion (332). The operator can further pull the replaceable tip (340) out of the reusable portion (332), discard the used replaceable occluder tip (340), disinfect the rest of the occluder (216) and the reusable portion (332), and attach a new occluder tip (340) to the disinfected reusable portion (332) to prepare for another surgical procedure.

[0088] Figures 11A to 11C Another exemplary replaceable tip assembly (360) is shown that can be easily incorporated into the occluder (216) to replace the aforementioned replaceable tip assembly (300). The replaceable tip assembly (360) includes a reusable portion (362) and a replaceable occluder tip (380). As will be described in more detail below, the replaceable occluder tip (380) can be selectively engaged and disengaged from the reusable portion (362) to replace a used occluder tip (380) with a new occluder tip (380).

[0089] The reusable portion (332) includes a tubular body (364) and a sliding drawer (370) in the extended position (e.g.) Figures 11A to 11B (as shown) and retraction position (as shown) Figure 11C The tubular body (364) is slidably attached to the tubular body (366) between the open distal end (366) and the elongated slot (338). The tubular body (364) can be fixed at the distal end of the elongated cylindrical shaft (262). The tubular body (364) defines an internal channel extending between the distal end of the opening (366) and the elongated slot (338). Figure 12 As best seen in the middle, the sliding drawer (370) includes a cylindrical body that is sized to be slidably fitted within an internal channel defined by a tubular body (364).

[0090] The sliding drawer (370) also includes a cross pin (372) and a resilient latch (374) disposed on the outer surface of the cylindrical body. The cross pin (372) is slidably received within an elongated slot (338) such that the elongated slot (338) defines the range of travel of the sliding drawer (370). Thus, the cross pin (372) and the elongated slot (338) together prevent the sliding drawer (370) from disengaging from the tubular body (364).

[0091] A resilient latch (374) is configured to selectively lock the sliding drawer (370) in a retracted position. When the sliding drawer (370) is distal from the retracted position, the resilient latch (374) may compress due to contact with the inner wall of the tubular body (364). Once the sliding drawer (370) is actuated to the retracted position, the resilient latch (374) expands within the elongated slot (368) to prevent the sliding drawer (370) from sliding distally relative to the tubular body (364). Additionally, when the sliding drawer (370) is in the retracted position, a cross pin (372) abuts against the proximal end of the elongated slot (338) to prevent the sliding drawer (370) from translating proximally within the tubular body (364). To unlock the sliding drawer (370) from its retracted position, the operator can drive the resilient latch (374) toward the cylindrical body of the sliding drawer (370), causing the resilient latch (374) to no longer be pressed against the distal end of the elongated slot (338). Simultaneously, the operator can pull the sliding drawer (370) distally out of its retracted position to unlock it.

[0092] The sliding drawer (370) also includes a distal sleeve (376) and a pair of connecting pins (378). The distal sleeve (376) is sized to receive a proximal connecting body (382) with a replaceable tip (380). The connecting pins (378) are sized to insert into pin holes (384) defined by the proximal connecting body (382) with the replaceable tip (380).

[0093] Similar to the reusable portion (302) described above, the reusable portion (362) is configured to be sterilized and reused in multiple surgical procedures. As taught herein, the reusable portion (362) can be formed from any suitable material, such as surgical steel, which will be apparent to those skilled in the art. In some examples, the reusable portion (362) may be formed from the same material as the elongated cylindrical shaft (262). Alternatively, the reusable portion (362) may be formed from another suitable material different from the material used to form the elongated cylindrical shaft (262).

[0094] The replaceable occluder tip (380) includes a connecting body (382) and a tapered distal tip (386) attached to the connecting body (382). The tapered distal tip (386) comprises a suitable tip geometry that is sharp enough, but not too sharp, to allow for non-invasive, yet easily accessible tissue diffusion of the patient's abdominal wall (2) when the replaceable tip assembly (380) is properly assembled as described herein. The tapered distal tip (386) can be configured for single use (or a predetermined number of multiple uses) such that, after surgical procedures, the occluder tip (380) is removed, the reusable portion (362) and the remainder of the occluder (216) are disinfected, and a new occluder tip (380) is attached to the reusable portion (362) as described herein. Thus, undesirable deviations in the tip geometry can be prevented from being used extensively, as described herein.

[0095] As described above, the connecting body (342) defines a pair of pin holes (384). Figures 11A to 11B As can be seen in the best view, when the sliding drawer (370) is in the extended position, the connecting body (342) can be inserted into the sleeve (376) of the sliding drawer (370), so that the pin (378) is inserted into the pin hole (384). At this time, as Figure 11B As shown, the connecting body (342) is longitudinally constrained by the sliding drawer (370). Next, as... Figures 11B to 11C As shown above, when the connecting body (342) is attached, the operator can push the sliding drawer (370) from the extended position proximally to the locked retracted position. Therefore, according to the above description, the sliding drawer (370) and the stopper tip (380) become locked relative to the tubular body (364). In addition, the sheath (376) of the connecting body (382) proximally to the stopper tip (380) and the sliding drawer (370) becomes accommodated within the tubular body (364), thus laterally constraining the stopper tip (380) relative to the tubular body (364).

[0096] With the replaceable occluder tip (380) properly connected to the reusable portion (362) and the rest of the occluder (216), the operator can properly insert the occluder (216) into the working channel (214) of the cannulation assembly (212) so that the operator can use the cannula (210) in accordance with the teachings herein.

[0097] After using the occluder (216) as described herein, the operator can remove the replaceable occluder tip (380) from the reusable portion (332) by inwardly actuating the resilient latch (374) so ​​that the resilient latch (374) is no longer abutting the distal end of the elongated slot (368). Any suitable tool can be used to inwardly actuate the resilient latch (374) in accordance with the teachings herein, as will be apparent to those skilled in the art. Simultaneously, the operator can pull the replaceable tip (340) distally, causing the sliding drawer (370) to move distally from the retracted position to the extended position. The operator can further pull the replaceable tip (380) out of the reusable portion (362), discard the used replaceable occluder tip (380), disinfect the rest of the occluder (216) and the reusable portion (362), and attach a new occluder tip (380) to the disinfected reusable portion (362) to prepare for another surgical procedure.

[0098] It should be understood that although the replaceable occluder tips (310, 340, 380) are described above as being used once and discarded, in some cases, the occluder tips (310, 340, 380) may be sterilized and reused multiple times before being replaced after a certain number of uses. In such cases, the remaining portion of the occluder (216) may be sterilized and reused more times than a single replaceable occluder tip (310, 340, 380).

[0099] III. Exemplary Combinations

[0100] 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.

[0101] Example 1

[0102] A surgical interventional device includes: (a) an occluder head; (b) an elongated shaft extending distally from the occluder head along a central axis, wherein the elongated shaft is sized to fit within a working channel of a cannula; and (c) an occluder tip assembly including: (i) a reusable portion attached to a distal portion of the elongated shaft, wherein the reusable portion is configured to be sterilized together with the elongated shaft; and (ii) a replaceable tip including: (A) a tapered distal tip configured to facilitate insertion of the surgical interventional device through the patient's body wall; and (B) a proximal coupling body configured to selectively engage with the reusable portion, wherein the replaceable tip is generally movable relative to the reusable portion along a mating path to engage the proximal coupling body with the reusable portion, wherein the mating path extends laterally relative to the longitudinal axis.

[0103] Example 2

[0104] According to the surgical interventional device of Embodiment 1, the reusable portion includes a convex connection portion, wherein the proximal connection body includes a complementary concave connection portion, the complementary concave connection portion being configured to receive the convex connection portion.

[0105] Example 3

[0106] According to the surgical intervention device of Embodiment 2, the convex connecting portion includes a key post, and the concave connecting portion includes a key hole.

[0107] Example 4

[0108] According to the surgical intervention device of Embodiment 2, the convex connecting portion includes a dovetail tenon, and the concave connecting portion includes a dovetail groove.

[0109] Example 5

[0110] According to any one or more of the surgical interventional devices described in Embodiments 2 to 4, the convex connection portion further includes a snap-fit ​​rib, wherein the concave connection portion is at least partially defined by a snap-fit ​​surface configured to abut against the snap-fit ​​rib when the proximal connection body is connected to the reusable portion.

[0111] Example 6

[0112] According to any one or more of the surgical interventional devices described in Embodiments 2 to 5, the proximal connection body further includes a plurality of internal ribs defining the complementary concave connection portion.

[0113] Example 7

[0114] According to the surgical intervention device of Embodiment 6, the plurality of internal ribs are configured to abut against the convex connecting portion of the reusable portion in order to prevent the convex connecting portion from being over-inserted into the concave connecting portion.

[0115] Example 8

[0116] According to any one or more of the surgical interventional devices described in Embodiments 1 to 8, the proximal connection body further includes a user gripping feature.

[0117] Example 9

[0118] The surgical interventional device according to any one or more of Examples 1 to 8, wherein the replaceable tip is formed of a plastic material.

[0119] Example 10

[0120] According to any one or more of the surgical interventional devices described in Embodiments 1 to 9, the replaceable tip is configured to be connected to the reusable portion via a snap-fit ​​engagement.

[0121] Example 11

[0122] The surgical interventional device according to any one or more of Embodiments 1 to 10 further includes a cannulation assembly.

[0123] Example 12

[0124] According to the surgical interventional device of embodiment 11, the cannula assembly further includes the cannula defining the working channel, wherein the working channel is configured to receive surgical instruments passing through it to approach a surgical site within the patient's body cavity when the elongated shaft is removed from the working channel.

[0125] Example 13

[0126] According to the surgical interventional device of embodiment 12, the cannulation assembly further includes a sealing assembly that defines a portion of the working channel.

[0127] Example 14

[0128] According to the surgical interventional device of Embodiment 13, the sealing assembly is releasably connected to the cannula.

[0129] Example 15

[0130] The surgical interventional device according to any one or more of Embodiments 1 to 14, wherein the occluder head includes a dome-shaped body.

[0131] Example 16

[0132] A surgical interventional device includes: (a) a cannulation assembly comprising: (i) a cannula; (ii) a sealing assembly coupled to a proximal end of the cannula; and (iii) a working channel at least partially defined by the cannula and the sealing assembly, the working channel extending longitudinally along a central axis of the cannula assembly, wherein the working channel is configured to receive surgical instruments passing through it to access surgical sites within a patient's body cavity; and (b) an occluder configured to be removably coupled to the cannula assembly along the central axis. To facilitate insertion of the surgical interventional device through the patient's body wall, the occluder includes: (i) an elongated shaft extending distally from the head of the occluder along a central axis, wherein the elongated shaft is sized to fit within the working channel of the cannulation assembly; and (ii) a replaceable tip including: (A) a tapered distal tip, and (B) a proximal coupling body configured to selectively engage with the elongated shaft, wherein the replaceable tip is movable relative to the elongated shaft along a coupling path that is not parallel to the central axis.

[0133] Example 17

[0134] According to the surgical intervention device of embodiment 16, one of the elongated shaft or the proximal connecting body includes a key post, wherein the other of the elongated shaft or the proximal connecting body defines a complementary keyhole configured to receive the key post.

[0135] Example 18

[0136] According to the surgical interventional device of embodiment 17, the cannula is configured to accommodate the key post and the keyhole when the occluder is connected to the cannula assembly.

[0137] Example 19

[0138] The surgical interventional device according to any one or more of Examples 16 to 18, wherein the cannula includes a plurality of annular ribs.

[0139] Example 20

[0140] A surgical interventional device includes: (a) an occluder head; (b) an elongated shaft extending distally from the occluder head along a longitudinal axis; and (c) an occluder tip assembly including: (i) a reusable portion attached to a distal portion of the elongated shaft, wherein the reusable portion includes a first mating feature, wherein the reusable portion is configured to be sterilized together with the elongated shaft; and (ii) a replaceable tip including: (A) a distal tip configured to facilitate insertion of the surgical device through a patient's body wall; and (B) a proximal connecting body attached to the distal tip, wherein the proximal connecting body includes a second mating feature movable relative to the first mating feature of the reusable portion along a mating path transverse to the longitudinal axis.

[0141] IV. Miscellaneous

[0142] 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.

[0143] 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 “Pinch-To-Clamp Cannula Depth Limiter”; U.S. Patent Application No. END9247USNP3, 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]; "Latchless Obturator with Interference Fit Feature" [Attorney Reference No. END9247USNP8]; "Balancing Feature for Reusable Trocar" [Attorney Reference No. END9247USNP9]; "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.

[0144] 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.

[0145] 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.

[0146] Devices of the types described above may be designed for single-use and disposal, or they may be designed for multiple uses. 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.

[0147] 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.

[0148] 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) Blocker head; (b) an elongated shaft extending distally from the head of the occluder along a longitudinal axis, wherein the elongated shaft is sized to fit within the working channel of the cannula; and (c) A sniper tip assembly, the sniper tip assembly comprising: (i) a reusable portion, said reusable portion being attached to the distal portion of said elongated shaft, wherein said reusable portion is configured to be sterilized together with said elongated shaft, and (ii) a replaceable tip, said replaceable tip comprising: (A) A tapered distal tip, the tapered distal tip being configured to facilitate insertion of the surgical interventional device through the patient's body wall, and (B) A proximal coupling body configured to selectively couple with the reusable portion. The replaceable tip is generally movable relative to the reusable portion along a mating path to connect the proximal coupling body to the reusable portion, wherein the mating path extends laterally relative to the longitudinal axis. Wherein, one of the reusable portion and the proximal connecting body includes a convex connecting portion, and the other of the reusable portion and the proximal connecting body includes a complementary concave connecting portion, the complementary concave connecting portion being configured to receive the convex connecting portion. The convex connection portion further includes a snap-fit ​​rib, wherein the concave connection portion is at least partially defined by a snap-fit ​​surface configured to abut against the snap-fit ​​rib when the proximal connection body is connected to the reusable portion.

2. The surgical interventional device according to claim 1, wherein, The convex connection portion includes a key post, wherein the concave connection portion includes a key hole.

3. The surgical interventional device according to claim 1, wherein, The convex connecting portion includes a dovetail tenon, wherein the concave connecting portion includes a dovetail groove.

4. The surgical interventional device according to claim 1, wherein, The proximal coupling body also includes a plurality of internal ribs that define the complementary concave coupling portion.

5. The surgical interventional device according to claim 4, wherein, The plurality of internal ribs are configured to abut against the convex connecting portion of the reusable portion in order to prevent the convex connecting portion from being over-inserted into the concave connecting portion.

6. The surgical interventional device according to claim 1, wherein, The proximal connection body also includes a user gripping feature.

7. The surgical interventional device according to claim 1, wherein, The replaceable tip is formed of a plastic material.

8. The surgical interventional device according to claim 1, wherein, The replaceable tip is configured to connect to the reusable portion via a snap-fit ​​engagement.

9. The surgical interventional device according to claim 1, further comprising a cannulation assembly.

10. The surgical interventional device according to claim 9, wherein, The cannulation assembly also includes the cannula defining the working channel, wherein the working channel is configured to receive surgical instruments passing through it to approach a surgical site within the patient's body cavity when the elongated shaft is removed from the working channel.

11. The surgical interventional device according to claim 10, wherein, The cannulation assembly also includes a sealing assembly that defines a portion of the working channel.

12. The surgical interventional device according to claim 11, wherein, The sealing assembly is releasably connected to the cannula.

13. The surgical interventional device according to claim 1, wherein, The occluder head includes a dome-shaped body.

14. The surgical interventional device according to claim 1, further comprising: The cannulation assembly includes: (i) the cannula (ii) a sealing assembly, said sealing assembly being connected to the proximal end of the cannula, and (iii) The working channel, which is at least partially defined by the cannula and the sealing assembly, extends longitudinally along the central axis of the cannula assembly, wherein the working channel is configured to receive surgical instruments passing through it to access surgical sites within the patient's body cavity.

15. The surgical interventional device according to claim 14, wherein, One of the elongated shaft or the proximal coupling body includes a keypost, wherein the other of the elongated shaft or the proximal coupling body defines a complementary keyhole configured to receive the keypost.

16. The surgical interventional device according to claim 15, wherein, The cannula is configured to accommodate the keypost and the keyhole when the occluder is connected to the cannula assembly.

17. The surgical interventional device according to claim 14, wherein, The cannula includes multiple annular ribs.

Images