CN116115168A

CN116115168A - Endoscope cleaning device

Info

Publication number: CN116115168A
Application number: CN202111349027.8A
Authority: CN
Inventors: 朱春晖; 陈鹏
Original assignee: Covidien LP
Current assignee: Covidien LP
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2023-05-16

Abstract

A surgical kit includes an endoscope and a cannula assembly. The cannula assembly includes a housing, an elongate shaft assembly, and a suction ring. The elongate shaft assembly includes an elongate shaft defining an interior cavity in communication with the housing and a sleeve mounted about the elongate shaft. The suction ring is coupled to the distal end portion of the elongate shaft. The suction ring defines a chamber and an opening in which the lens of the endoscope is received. The suction ring is convertible between a first configuration in which the opening of the suction ring is configured to generate bubbles when injected gas passes through the opening of the suction ring and into the chamber with the pressurized fluid, and a second configuration in which the opening of the suction ring is in sealing engagement with the tubular shaft of the endoscope.

Description

Endoscope cleaning device

Technical Field

The present disclosure relates to a minimally invasive viewing instrument, and more particularly, to an endoscope cleaning device for removing debris from a lens of an endoscope and a method of using the same.

Background

Minimally invasive surgery eliminates the need for the patient to initiate a large incision, thereby reducing discomfort, recovery time, and many of the deleterious side effects associated with traditional open surgery. Minimally invasive viewing instruments, such as laparoscopes and endoscopes, provide for viewing internal tissues and/or organs during minimally invasive procedures.

Laparoscopic surgery involves placing a laparoscope in a small incision in the patient's abdominal wall to view the surgical site. Endoscopic surgery involves placing an endoscope in a naturally occurring orifice, such as the mouth, nose, anus, urethra, or vagina, to view the surgical site. Other minimally invasive surgical procedures include video assisted thoracic surgery and cardiovascular surgery through small incisions between the ribs. These procedures also utilize an oscilloscope to view the surgical site.

A typical minimally invasive viewing instrument (e.g., a laparoscope or an endoscope) includes a housing, an elongated lens shaft extending from one end of the housing, and a lens disposed at a distal end of the elongated lens shaft. A camera viewfinder extends from the other end of the housing. The camera is connected to the housing and transmits an image seen through the lens to an external monitor that displays the image. During surgery, the distal portion of the elongate lens shaft extends into the patient, while the proximal portion of the elongate lens shaft, the housing, and the camera viewfinder remain outside the patient. In this way, the laparoscope/endoscope is positioned and adjusted to view specific anatomical structures in the surgical field on the monitor.

During insertion of an endoscope or laparoscope into the body and during surgery, debris such as organics and/or moisture may be deposited on the lens of the endoscope. Debris and condensate build up on the lens can affect visualization of the surgical site and typically requires cleaning of the lens.

Disclosure of Invention

The present disclosure describes a cleaning device for use with an endoscope that illustrates a practical method associated with cleaning the lens of an endoscope during surgery that meets performance requirements and overcomes usability challenges.

According to one aspect of the present disclosure, a surgical kit includes an endoscope including a tubular shaft terminating in a lens and cannula assembly. The cannula assembly includes a housing, an elongate shaft assembly, and a suction ring. The housing includes an inlet port coupled to a fluid source, an outlet port coupled to a vacuum source, and an insufflation port coupled to an insufflation gas source. An elongate shaft assembly extends distally from the housing. The elongate shaft assembly includes an elongate shaft defining an interior cavity in communication with the housing and a sleeve mounted about the elongate shaft. The suction ring is coupled to the distal end portion of the elongate shaft. The suction ring defines a chamber and an opening in which the lens of the endoscope is received. The suction ring is convertible between a first configuration in which the opening of the suction ring is configured to generate bubbles when injected gas passes through the opening of the suction ring and into the chamber with the pressurized fluid, and a second configuration in which the opening of the suction ring is in sealing engagement with the tubular shaft of the endoscope.

In one aspect, the elongate shaft can define first and second slots that, together with the sleeve, define inlet and outlet passages.

In another aspect, the elongate shaft of the elongate shaft assembly can include an access aperture in a distal portion of the elongate shaft. The inlet aperture may be in communication with the lumen of the elongate shaft and the inlet channel such that cleaning fluid flowing distally through the inlet channel enters the chamber of the suction ring.

In yet another aspect, the elongate shaft can define an outlet aperture in communication with the lumen of the elongate shaft and the outlet channel.

In yet another aspect, the suction ring can be disposed within a sleeve of the elongate shaft assembly.

In yet another aspect, the inlet and outlet channels may communicate with respective inlet and outlet ports of the housing.

In yet another aspect, the insufflation gas may be CO ₂ 。

In one aspect, the suction ring may define a cutout portion configured to facilitate switching of the opening of the suction ring between the first configuration and the second configuration.

In another aspect, the fluid source may supply brine.

In yet another aspect, a sleeve of the elongate shaft assembly is removably supported about the elongate shaft.

In yet another aspect, the bubbles generated by the injected gas and the pressurized fluid passing through the openings of the pumping ring may create turbulence.

According to another aspect of the present disclosure, a method of cleaning an endoscope includes: supplying insufflation gas to a body cavity, placing an endoscope through a cannula assembly such that a lens of the endoscope is disposed distal of and exposed to an aspiration ring mounted on a distal portion of an elongate shaft of the cannula assembly, retracting the endoscope such that the lens of the endoscope is disposed within a chamber of the aspiration ring, supplying pressurized cleaning fluid to the chamber of the aspiration ring such that the insufflation gas entering the chamber of the aspiration ring through an opening in the aspiration ring creates bubbles, agitating debris on the lens of the endoscope by directing turbulence formed by the pressurized cleaning fluid and the bubbles to the lens, and removing the cleaning fluid from the aspiration ring through an outlet port of a housing of the cannula assembly.

In one aspect, the method may further comprise connecting the outlet port of the housing to a vacuum source.

In another aspect, supplying the insufflation gas may include supplying CO to the body cavity ₂ 。

In yet another aspect, supplying the cleaning fluid may include connecting the inlet port to a fluid source.

In yet another aspect, supplying pressurized cleaning fluid may include supplying pressurized brine.

According to yet another aspect of the present disclosure, a method of cleaning an endoscope includes: placing a portion of an endoscope in a cleaning device such that a lens of the endoscope is disposed within a suction ring mounted on a distal portion of the cleaning device, supplying pressurized cleaning fluid to the lens of the endoscope, applying suction to the suction ring to remove the pressurized cleaning fluid from the suction ring, and directing insufflation gas from a body cavity into the suction ring through an opening in the suction ring, whereby the pressurized cleaning fluid and the insufflation gas create bubbles in the suction ring and create turbulence within the suction ring towards the lens of the endoscope, and removing debris on the lens.

In another aspect, applying suction to the suction ring includes applying suction to the suction ring formed of an elastic material that is switchable between a first configuration in which an opening of the suction ring is configured to generate bubbles when an injection gas is supplied to a chamber of the suction ring having a pressurized cleaning fluid, and a second configuration in which the opening of the suction ring is configured to receive an endoscope in sealing relationship.

In another aspect, the method may further include supplying a cleaning fluid through an inlet port of a housing of the cleaning device and applying a vacuum to an outlet port of the housing.

In yet another aspect, the method may further comprise supplying CO to the body lumen ₂ 。

Drawings

The above and other aspects and features of the present disclosure will become more apparent in light of the following detailed description taken in conjunction with the accompanying drawings in which like reference characters designate like or identical elements.

FIG. 1 is a perspective view of a cannula assembly according to the present disclosure;

FIG. 2 is a perspective view of the sleeve assembly of FIG. 1 showing an elongate shaft of the elongate shaft assembly;

fig. 3 is a side cross-sectional view taken along section line 3-3 of fig. 1;

fig. 4 is a perspective view of the elongate shaft assembly taken along section line 4-4 of fig. 2, showing the elongate shaft assembly without the sleeve;

fig. 5 is a perspective view of the elongate shaft assembly taken along section line 5-5 of fig. 2, showing the telescopic elongate shaft assembly;

FIG. 6 is a perspective view of the cannula assembly of FIG. 1 showing the sleeve removed from the elongate shaft assembly;

fig. 7 is a perspective view of the elongate shaft assembly taken along section line 7-7 of fig. 6, showing the elongate shaft assembly without the sleeve;

fig. 8 is a perspective view of the elongate shaft assembly taken along section line 8-8 of fig. 6, showing the elongate shaft assembly with the sleeve;

FIG. 9 is a perspective view of a suction ring of the cannula assembly of FIG. 1;

fig. 10 is a cross-sectional view of the suction ring taken along section line 10-10 of fig. 9;

FIG. 11 is a perspective view of a lens cleaning device according to another aspect of the present disclosure;

fig. 12 is a partial perspective view of the lens cleaning device taken along section line 12-12 of fig. 11;

fig. 13 is a perspective view of the housing of the cleaning device taken along section line 13-13 of fig. 12; and is also provided with

Fig. 14 is a partial cross-sectional view of the cleaning device of fig. 11, taken along section line 14-14 of fig. 11.

Detailed Description

The endoscope cleaning apparatus disclosed herein is described in detail with reference to the drawings, wherein like reference numerals designate identical or corresponding elements in each of the several views.

As used herein, the term "distal" refers to the portion that is described as being farther from the user, while the term "proximal" refers to the portion that is described as being closer to the user. Furthermore, the terms parallel and perpendicular are understood to include relative configurations of substantially parallel and substantially perpendicular up to about +or-10 degrees from true parallel and true perpendicular. Furthermore, to the extent consistent, any or all of the aspects detailed herein may be used in combination with any or all of the other aspects detailed herein.

Fig. 1 and 2 illustrate an exemplary in-situ lens cleaning device according to the present disclosure in the form of a cannula assembly 100. Cannula assembly 100 is configured to allow access to, for example, an inflated abdominal cavity during a minimally invasive surgical procedure to allow for the introduction of surgical supplies for performing various surgical tasks on internal organs within the body cavity. The surgical implement may be an endoscope 10 (fig. 3) or a surgical instrument such as a laparoscopic or endoscopic clip applier, obturator, grasper, dissector, retractor, stapler, laser probe, camera device, tube, electrosurgical device, or the like. In particular, the cannula assembly 100 enables cleaning of the lens 18 (fig. 3) of the endoscope 10 during surgery to maintain a clear image without having to remove the endoscope 10 from the patient's body. Furthermore, the cannula assembly 100 enables the use of a cleaning fluid without increasing the risk of, for example, tumor spread by retaining the used cleaning fluid within the cannula assembly 100, as described below.

Fig. 3 shows endoscope 10 inserted into sleeve assembly 100. The endoscope 10 includes a housing and a tubular shaft 12 extending distally from the housing and terminating in a lens 18. The distal tip portion of endoscope 10 includes a plurality of optical components for producing an image of patient tissue, as known to those skilled in the art. The optics typically include a window or front element of a lens assembly located in front of an image sensor (not shown) or in front of a fiber optic imaging guide that transmits images to the proximal end of the endoscope 10. Light sources such as light emitting diodes, optical fibers or illumination guides may also be provided. The camera is adapted to receive an image of the surgical field seen through the lens 18 and to transmit the image to, for example, an external monitor on which the image of the surgical field is displayed. That is, the visual display device converts the optical signal into a video signal to produce a video image on the monitor (or for storage on a selected medium). Thus, when performing a surgical procedure using a minimally invasive or endoscopic surgical instrument, the monitor enables a clinician to view anatomical structures in the surgical field within the patient. Throughout the procedure, condensate, smoke particles, and biological tissue or matter tend to contact the lens 18 of the endoscope 10 and accumulate on the lens 18. This tends to obscure the image of the surgical field when they are displayed on the monitor. To this end, the sleeve assembly 100 may be used in conjunction with the endoscope 10 to enable cleaning of the lens 18 during surgery to maintain a clear image without having to remove the endoscope 10 from the patient, which in turn shortens the procedure time.

Referring briefly to fig. 1 and 2, the cannula assembly 100 includes a housing 200, an elongate shaft assembly 300 extending distally from the housing 200, and a suction ring 500 coupled to the elongate shaft assembly 300. The housing 200 is sized for grasping by a clinician and may include one or more internal seals adapted to establish a seal around an endoscope 10 (fig. 3) introduced through the housing. The housing 200 includes a fluid connector 210 for connection to an insufflation gas source 1000 for delivery at a surgical site (e.g., intra-abdominal cavity). The housing 200 of the cannula assembly 100 also includes an inlet port 220 coupled to the fluid source 2000 and an outlet port 240 coupled to the vacuum source 3000.

Fig. 2-3 illustrate an elongate shaft assembly 300 that includes an elongate shaft 320 and a sleeve 360 that is removably secured about the elongate shaft 320. Elongate shaft 320 defines a longitudinal lumen 102 extending therethrough to receive endoscope 10. The longitudinal lumen 102 is in fluid communication with a fluid connector 210 to deliver insufflation gas into the abdominal cavity to establish and/or maintain a pneumoperitoneum. In one aspect, the elongate shaft assembly 300 can be rigid, semi-rigid, or flexible. Fig. 4-8 illustrate an elongate shaft 320 defining inlet and

outlet apertures

322, 332 disposed circumferentially and in communication with the longitudinal lumen 102. Inlet aperture 322 is in fluid communication with inlet port 220 through inlet slot 324 and outlet aperture 332 is in fluid communication with outlet port 240 through outlet slot 334. In particular, the inlet slot 324 includes a longitudinal member 324a and a circumferential member 324b. The outlet groove 334 includes a longitudinal member 334a and a circumferential member 334b. In this configuration, when sleeve 360 is mounted on elongate shaft 320, inlet slot 324, outlet slot 334, and sleeve 360 define inlet channel 372 and outlet channel 376, respectively. In one aspect, the inlet aperture 322 is distal to the outlet aperture 332.

Fig. 9 and 10 illustrate a suction ring 500 coupled to a distal portion of elongate shaft 320 (fig. 2). The suction ring 500 is adjustable to enable the endoscope 10 to pass therethrough and to retain therein a cleaning fluid for cleaning the lens 18 of the endoscope 10, as will be described. In an aspect, suction ring 500 can be, for example, overmolded, ultrasonically welded, or glued to elongate shaft 320. Suction ring 500 defines a chamber 510, which chamber 510 is configured to receive lens 18 (fig. 3) of endoscope 10 and cleaning fluid from fluid source 2000 (fig. 1). Suction ring 500 defines an opening 502 to receive lens 18 of endoscope 10 therethrough. The opening 502 is in fluid communication with the chamber 510. In particular, the suction ring 500 is formed of a flexible or pliable material that is easily convertible between a first or expanded configuration in which the opening 502 of the suction ring 500 is expanded to receive the lens 18 of the endoscope 10 in sealing relationship, and a second or retracted configuration in which the opening 502 is configured to allow insufflation gas from the body cavity to pass into the chamber 510. In addition, the pressurized cleaning fluid and the insufflation gas flowing into the chamber 510 of the suction ring 500 create bubbles in the chamber 510 to further enhance agitation of the pressurized cleaning fluid by creating turbulence in the chamber 510 directed toward the lens 18 of the endoscope 10. The suction ring 500 may include a weakened portion or cutout 508 that facilitates switching of the opening 502 between the first configuration and the second configuration. In one aspect, the suction ring 500 can include a non-uniform thickness to provide a weakened portion to facilitate transitioning between the expanded and retracted configurations.

In another aspect, suction ring 500 includes a plurality of distal edges 512 joined at opening 502. In another aspect, the opening 502 may be defined centrally. Adjacent distal edges 512 define a cutout 518 to facilitate transition between the first configuration and the second configuration.

Referring briefly to fig. 1, inlet port 220 is coupled to a fluid source 2000 and outlet port 240 is coupled to a vacuum source 3000 such that pressurized cleaning fluid from fluid source 2000 flows to lens 18 of endoscope 10 located in chamber 510 of suction ring 500. In addition, the suction created by the vacuum source 3000 draws the used cleaning fluid toward the outlet port 240. Injecting a gas (e.g. CO ₂ ) The positive pressure created in the body lumen, in combination with the suction created by the vacuum source 3000, retains the cleaning fluid within the elongate shaft assembly 300, i.e., prevents the cleaning fluid from exiting through the opening 502 of the suction ring 500 and into the body lumen. In contrast, negative pressure causes CO ₂ Flows into the chamber 510 through the opening 502. In this configuration, CO flowing into chamber 510 with pressurized cleaning fluid ₂ Bubbles are generated which further agitate the pressurized cleaning fluid and create turbulence towards the lens 18 of the endoscope 10. In this way, debris deposited on the lens 18 of the endoscope 10 can be effectively removed. The cleaning fluid then exits the chamber 510 through the outlet port 240 via the outlet channel 376 (fig. 8). In this way, the cleaning fluid does not escape into the body cavity. The cleaning fluid cleans the lens 18 and flows through the outlet channel 376 (fig. 8) to the outlet port 240.

In use, an insufflation gas, such as CO, is initially supplied to a surgical site (e.g., the abdominal cavity) by connecting the fluid connector 210 to the insufflation gas source 1000 ₂ . Thereafter, the endoscope 10 is inserted into the endoscope 10 such that the lens 18 of the endoscope protrudes out of the suction ring 500. The seal in the housing 200 forms a fluid tight seal against the endoscope 10 and the suction ring 500 sealingly engaging the endoscope. In this way, the body cavity maintains pneumoperitoneum, i.e. insufflates gas (e.g. CO ₂ ) Is maintained within the body cavity at the desired pressure. The endoscope 10 may be directed to a surgical site. When the lens 18 of the endoscope 10 is obscured by fluid or debris, the clinician may retract the lens 18 such that the lens 18 is disposed within the chamber 510 (fig. 10) of the suction ring 500. Pressurized cleaning fluid is supplied to the chambers of the suction ring 500 through the inlet port 220 via the inlet channels 372 (fig. 3)510. At this time, the suction force created by the vacuum source 3000 and the positive pressure created by the insufflation gas in the body cavity cause the insufflation gas to flow through the opening 502 into the chamber 510 of the suction ring 500 and create bubbles that further agitate the pressurized cleaning fluid and create turbulence towards the lens 18 of the endoscope 10. In this way, debris 18 on the lens is removed. The cleaning fluid with debris is removed by vacuum source 3000 via outlet channel 376 (fig. 8). In this way, the clinician can improve the visibility of the lens 18 without removing the endoscope 10 from the surgical site, while inhibiting the flow of used cleaning fluid into the body cavity. Thereafter, the lens 18 of the endoscope 10 may be advanced through the opening 502 of the suction ring 500 to continue the surgical procedure.

Fig. 11 illustrates an exemplary in-situ lens cleaning device, shown generally as cleaning device 1100, in accordance with another aspect of the present disclosure. The cleaning device 1100 is capable of cleaning the lens 18 (fig. 14) of the endoscope 10 during a surgical procedure to maintain a clear image without removing the endoscope 10 from the patient's body. Furthermore, the cleaning device 1100 enables the use of a cleaning fluid without increasing the risk of, for example, tumor spreading by retaining the used cleaning fluid within the cleaning device 1100 while enhancing the removal of debris from the lens 18. The components of the cleaning device 1100 that are substantially similar to the components of the cannula assembly 100 will not be described again to avoid obscuring the present disclosure with unnecessary detail. The cleaning device 1100 includes a housing 1300, an elongate shaft 1400 extending distally from the housing 1300, and a suction ring 1500 mounted on a distal portion of the elongate shaft 1400. The suction ring 1500 is adjustable to enable the endoscope 10 to pass therethrough, and for example when using an injection gas (e.g., CO ₂ ) The body cavity is pressurized to retain a cleaning fluid therein (fig. 14), as described below.

Housing 1300 includes an inlet port 1220 and an outlet port 1240 connected to fluid source 2000 and vacuum source 3000, respectively. Fig. 12 shows a housing 1300 further defining a proximal inlet channel 1222 in communication with an inlet port 1220 and a proximal outlet channel 1242 in communication with an outlet port 1240. Fig. 12 and 13 illustrate an inner surface 1402 of the elongate shaft 1400 that defines an inlet channel 1420 and an outlet channel 1440 that communicate with a proximal inlet channel 1222 and a proximal outlet channel 1242, respectively. The inlet channel 1420 and the outlet channel 1440 are in communication with an interior cavity 1460 defined by the elongate shaft 1400. In addition, the inlet channels 1420 and the outlet channels 1440 communicate with the chamber 1510 (fig. 14) of the pumping ring 1500. With such a configuration, as shown in fig. 13 and 14, when the endoscope 10 is inserted through the lumen 1460 of the elongate shaft 1400, the outer surface of the endoscope 10 and the inlet channel 1420 define a longitudinal inlet channel 1428, and the outer surface of the endoscope 10 and the outlet channel 1440 define a longitudinal outlet channel 1448 that is separate from the longitudinal inlet channel 1428. Pressurized cleaning fluid enters the inlet port 1220 and flows through the proximal inlet channel 1222 of the housing 1300 and the longitudinal inlet channel 1428 of the elongate shaft 1400 toward the lens 18 of the endoscope 10 disposed within the chamber 1510 of the suction ring 1500. The vacuum source 3000 causes used cleaning fluid to flow out of the outlet port 1240 (fig. 11) through the longitudinal outlet passage 1448 of the elongate shaft 1400 and the proximal outlet passage 1242 of the housing 1300.

Fig. 14 further illustrates a suction ring 1500 secured to a distal portion of the elongate shaft 1400. The suction ring 1500 may be, for example, overmolded, ultrasonically welded, or glued to the elongate shaft 1400. The suction ring 1500 defines an opening 1502, the opening 1502 being configured to receive the endoscope 10 therethrough. The suction ring 1500 includes a weakened portion or slit 1508 that facilitates expansion of the opening 1502 to sealingly receive the endoscope 10. In one aspect, the suction ring 1500 includes a non-uniform thickness to provide the weakened portion. As described above with respect to suction ring 500, suction ring 1500 is formed of a flexible or pliable material that can be easily converted between a first or expanded configuration in which opening 1502 of suction ring 1500 expands to sealingly receive lens 18 of endoscope 10, and a second or retracted configuration in which opening 1502 is configured to enable the passage of insufflation gas from a body cavity and into chamber 1510. In addition, the pressurized cleaning fluid and the injected gas flowing into the chamber 1510 of the suction ring 1500 create bubbles in the chamber 1510 to further enhance agitation of the pressurized cleaning fluid by creating turbulence in the chamber 1510 directed toward the lens 18 of the endoscope 10.

The negative or suction force applied to the suction ring 1500 by using the vacuum source 3000 and the positive pressure of the body cavity provided by the insufflation gas enable a cleaning fluid to be supplied to the lens 18 of the endoscope 10 to remove debris from the lens 18, and then the cleaning fluid is removed from the chamber 1510 through the outlet port 1240 without entering the body cavity through the opening 1502 of the suction ring 1500. The use of the cleaning device 1100 is substantially the same as the cannula assembly 100 (fig. 1) described above and will not be described again.

Although the present disclosure is illustrated in the accompanying drawings, the disclosure is not intended to be limited thereto, the scope of the disclosure is intended to be as broad as the art allows, and the specification can be similarly read. For example, it is also contemplated that cannula assembly 100 and lens cleaning device 1100 may be adapted for use with robotic surgical systems. Accordingly, the above description should not be construed as limiting, but merely as exemplifications. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended hereto.

Claims

1. A surgical kit, the surgical kit comprising:

an endoscope comprising a tubular shaft terminating in a lens; and

a cannula assembly, the cannula assembly comprising:

a housing including an inlet port coupled to a fluid source, an outlet port coupled to a vacuum source, and an insufflation port coupled to an insufflation gas source;

an elongate shaft assembly extending distally from the housing, the elongate shaft assembly comprising:

an elongate shaft defining an inner lumen in communication with the housing; and

a sleeve mounted about the elongate shaft; and

an aspiration ring coupled to the distal end portion of the elongate shaft, the aspiration ring defining a chamber in which the lens of the endoscope is received, the aspiration ring being convertible between a first configuration in which the opening of the aspiration ring is configured to create a bubble when an injection gas passes through the opening of the aspiration ring and into a chamber with pressurized fluid, and a second configuration in which the opening of the aspiration ring engages the tubular shaft of the endoscope in sealing relationship.

2. The surgical kit of claim 1, wherein the elongate shaft defines first and second slots that together with the sleeve define inlet and outlet passages.

3. The surgical kit of claim 2, wherein the elongate shaft of the elongate shaft assembly includes an inlet aperture in a distal portion of the elongate shaft, the inlet aperture in communication with the lumen of the elongate shaft and the inlet channel such that cleaning fluid flowing distally through the inlet channel enters the chamber of the suction ring.

4. The surgical kit of claim 3, wherein the elongate shaft defines an outlet aperture in communication with the lumen of the elongate shaft and the outlet channel.

5. The surgical kit of claim 1, wherein the suction ring is disposed within the sleeve of the elongate shaft assembly.

6. The surgical kit of claim 2, wherein the inlet channel and the outlet channel are in communication with respective inlet and outlet ports of the housing.

7. The surgical kit of claim 1, wherein the insufflation gas is CO ₂ 。

8. The surgical kit of claim 1, wherein the suction ring defines a cutout portion configured to facilitate transition of the opening of the suction ring between the first and second configurations.

9. The surgical kit of claim 1, wherein the fluid source supplies saline.

10. The surgical kit of claim 1, wherein the sleeve of the elongate shaft assembly is removably supported about the elongate shaft.

11. The surgical kit of claim 1, wherein the insufflation gas passing through the opening of the suction ring forms turbulence with bubbles generated by the pressurized fluid.

12. A method of cleaning an endoscope, the method comprising:

supplying an insufflation gas to the body cavity;

placing an endoscope through a cannula assembly such that a lens of the endoscope is disposed distal to a suction ring mounted on a distal portion of an elongate shaft of the cannula assembly and exposed to the body lumen;

retracting the endoscope such that the lens of the endoscope is disposed within the lumen of the suction ring;

supplying pressurized cleaning fluid to the chamber of the pumping ring such that injection gas entering the chamber of the pumping ring through openings in the pumping ring creates bubbles;

agitating debris on the lens of the endoscope by directing turbulence formed by the pressurized cleaning fluid and the bubbles toward the lens; and

cleaning fluid is removed from the suction ring through an outlet port of a housing of the cannula assembly.

13. The method of claim 12, further comprising connecting the outlet port of the housing to a vacuum source.

14. The method of claim 12, wherein supplying the insufflation gas comprises supplying CO to the body cavity ₂ 。

15. The method of claim 12, wherein supplying a cleaning fluid comprises connecting the inlet port to a fluid source.

16. The method of claim 12, wherein supplying pressurized cleaning fluid comprises supplying pressurized brine.

17. A method of cleaning an endoscope, the method comprising:

placing a portion of an endoscope in a cleaning device such that a lens of the endoscope is disposed within a suction ring mounted on a distal portion of the cleaning device;

supplying pressurized cleaning fluid to the lens of the endoscope;

applying suction to the suction ring to remove the pressurized cleaning fluid from the suction ring and to introduce an insufflation gas from a body cavity into the suction ring through an opening in the suction ring, whereby the pressurized cleaning fluid and the insufflation gas create bubbles in the suction ring and create turbulence within the suction ring towards the lens of the endoscope; and

debris is removed from the lens.

18. The method of claim 17, wherein applying suction to the suction ring comprises applying suction to the suction ring formed of an elastic material that is switchable between a first configuration in which the opening of the suction ring is configured to generate bubbles when the injection gas is supplied to the chamber of the suction ring with pressurized cleaning fluid and a second configuration in which the opening of the suction ring is configured to receive the endoscope in sealing relationship.

19. The method of claim 17, further comprising supplying the cleaning fluid through an inlet port of a housing of the cleaning device and applying a vacuum to an outlet port of the housing.

20. The method of claim 17, further comprising supplying CO to the body lumen ₂ 。