Fluid delivery device for use with an endoscope
By designing a fluid delivery system, including a sleeve, fluid cannula, and actuator, the challenges of endoscopic fluid delivery have been addressed, achieving efficient and precise fluid delivery suitable for a variety of medical treatments.
Patent Information
- Application Number
- CN202480069904.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-06
- Filing Date
- 2024-09-05
- Publication Date
- 2026-05-29
AI Technical Summary
Existing medical devices present challenges in fluid delivery when combined with endoscopes, making it difficult to efficiently and flexibly deliver therapeutic fluids to the target site.
A fluid delivery system is designed, including a sleeve, a fluid sleeve, a distal annular component, and an actuator, which enables precise fluid delivery by moving the fluid sleeve between different positions.
It enables efficient and flexible delivery of fluid to the target site of the endoscope, and is suitable for treating patients with bleeding ulcers and after tissue resection. It provides a variety of treatment methods, including covering the ulcer, stopping bleeding, and sealing the fistula.
Smart Images
Figure CN122121790A_ABST
Abstract
Description
Cross-references to related applications
[0001] This application claims priority to U.S. Provisional Patent Application Serial No. 63 / 580,839, filed September 6, 2023, the disclosure of which is incorporated herein by reference. Technical Field
[0002] This disclosure relates to medical devices and methods of manufacturing medical devices. More specifically, this disclosure relates to fluid delivery devices for use with endoscopes. Background Technology
[0003] Various medical devices have been developed for medical applications, such as endovascular applications. Some of these devices include guidewires, catheters, and endoscopes. These devices are manufactured using a variety of different methods and can be used according to any of these methods. Each of the known medical devices and methods has its own advantages and disadvantages. There is a ongoing need for alternative medical devices and alternative methods for manufacturing and using them. Summary of the Invention
[0004] This disclosure provides designs, materials, manufacturing methods, and alternatives for using medical devices. A system for use with an endoscope is disclosed. The system includes: a sleeve configured to be coupled to an outer surface of an endoscope; a housing coupled to the sleeve, the housing having a proximal region, a distal region, and a fluid chamber defined therein; wherein a plurality of openings are formed in the distal region; an actuator coupled to the proximal region of the housing and extending proximally therefrom; a distal annular member disposed within the housing, the distal annular member being axially fixed relative to the sleeve and relative to the housing; and wherein the housing is configured to move relative to the endoscope between a first position and a second position.
[0005] Alternatively or additionally, in any of the above embodiments, the sleeve comprises silicone.
[0006] Alternatively or additionally, in any of the above embodiments, the housing includes an inner wall and an outer wall, and wherein the fluid chamber is defined between the inner wall and the outer wall.
[0007] Alternatively or additionally, in any of the above embodiments, the distal region of the housing is arc-shaped.
[0008] Alternatively or additionally, in any of the above embodiments, the actuator includes a pull wire.
[0009] Alternatively or additionally, any of the above embodiments may further include one or more additional actuators.
[0010] Alternatively or additionally, any of the above embodiments further includes a proximal annular member configured to surround the endoscope and positioned proximal to the distal annular member.
[0011] Alternatively or additionally, any of the above embodiments further includes a spacer extending between the distal annular member and the proximal annular member.
[0012] Alternatively or additionally, in any of the above embodiments, the actuator extends through the proximal annular member.
[0013] Alternatively or additionally, any of the above embodiments further includes one or more coil members configured to surround the endoscope.
[0014] Alternatively or additionally, in any of the above embodiments, the actuator is disposed between the one or more coil members and the outer surface of the endoscope.
[0015] Alternatively or additionally, in any of the above embodiments, when the housing is in the first position, the distal annular member is disposed adjacent to the proximal region of the housing.
[0016] Alternatively or additionally, in any of the above embodiments, when the housing is in the second position, the distal annular member is disposed distal to the proximal region of the housing.
[0017] A system for use with an endoscope is disclosed. The system includes: a sleeve configured to be coupled to an outer surface of an endoscope; a fluid cannula coupled to the sleeve, the fluid cannula including an inner wall member, an outer wall member, a fluid chamber defined between the inner wall member and the outer wall member, and an arcuate distal surface having a plurality of openings formed therein; a distal annular member disposed within the fluid cannula, the distal annular member being axially fixed relative to the endoscope; wherein the fluid cannula is configured to move between the first position and the second position; wherein when the fluid cannula is in the first position, the distal annular member is disposed adjacent to a proximal region of the fluid cannula; wherein when the fluid cannula is in the second position, the distal annular member is disposed distal to the proximal region of the fluid cannula; and an actuator coupled to and extending proximally therefrom the fluid cannula, the actuator being configured to move the fluid cannula between the first position and the second position.
[0018] Alternatively or additionally, any of the above embodiments further includes a proximal annular member configured to surround the endoscope and positioned proximal to the distal annular member.
[0019] Alternatively or additionally, any of the above embodiments further includes a spacer extending between the distal annular member and the proximal annular member.
[0020] Alternatively or additionally, in any of the above embodiments, the actuator extends through the proximal annular member.
[0021] Alternatively or additionally, any of the above embodiments further includes one or more coil members configured to surround the endoscope.
[0022] Alternatively or additionally, in any of the above embodiments, the actuator is disposed between the one or more coil members and the outer surface of the endoscope.
[0023] A method for delivering fluid during endoscopic surgery is disclosed. The method includes: positioning an endoscope having a fluid delivery system coupled thereto adjacent to a target site, wherein the fluid delivery system includes: a sleeve configured to be coupled to an outer surface of the endoscope; a fluid cannula coupled to the sleeve, the fluid cannula including an inner wall member, an outer wall member, a fluid chamber defined between the inner wall member and the outer wall member, and an arcuate distal surface having a plurality of openings formed therein; a distal annular member disposed within the fluid cannula, the distal annular member being axially fixed relative to the endoscope; wherein the fluid cannula is configured to move between a first position and a second position; wherein when When the fluid sleeve is in a first position, the distal annular member is disposed adjacent to the proximal region of the fluid sleeve; wherein when the fluid sleeve is in a second position, the distal annular member is disposed distal to the proximal region of the fluid sleeve; and an actuator coupled to and extending proximally therefrom the fluid sleeve, the actuator being configured to move the fluid sleeve between the first position and the second position; and actuating the actuator to move the fluid sleeve toward the second position and deliver fluid disposed in the fluid chamber from the fluid sleeve through a plurality of openings on the arcuate distal surface of the fluid sleeve.
[0024] The above overview of some embodiments is not intended to describe every disclosed embodiment or every implementation of this disclosure. These embodiments are illustrated in more detail by the following figures and detailed description. Attached Figure Description
[0025] This disclosure can be more fully understood by considering the following detailed description taken in conjunction with the accompanying drawings, in which:
[0026] Figure 1 This is a perspective view of an exemplary fluid delivery device used with an endoscope.
[0027] Figure 2 This is a partial cross-sectional side view of a portion of an exemplary fluid delivery device used with an endoscope.
[0028] Figure 3 This is a partial cross-sectional side view of a portion of an exemplary fluid delivery device used with an endoscope.
[0029] Figure 4 This is a perspective view of a portion of an exemplary fluid delivery device used with an endoscope.
[0030] Figure 5 This is a perspective view of an exemplary fluid delivery device used with an endoscope.
[0031] Figure 6 This is a partial cross-sectional side view of a portion of an exemplary fluid delivery device used with an endoscope.
[0032] Figure 7 This is a partial cross-sectional side view of a portion of an exemplary fluid delivery device used with an endoscope.
[0033] Although this disclosure is subject to various modifications and alternatives, its details have been shown by way of example in the accompanying drawings and will be described in more detail. However, it should be understood that the invention is not intended to be limited to the specific embodiments described. Rather, it is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of this disclosure. Detailed Implementation
[0034] The following definitions shall apply to the use of the terms, unless otherwise defined in the claims or elsewhere in this specification.
[0035] Throughout this document, whether explicitly stated or not, all numerical values are assumed to be modifiable by the term "approximately." The term "approximately" generally refers to a range of values that a person skilled in the art would consider equivalent to the referenced value (e.g., having the same function or result). In many cases, the term "approximately" may include numerical values rounded to the nearest significant figure.
[0036] The numerical range expressed by the endpoints includes all numbers within that range (e.g., 1 to 5 includes 1, 1.5, 2, 2.75, 3, 3.80, 4, and 5).
[0037] The singular forms “a,” “an,” and “the” used in this specification and the appended claims include plural objects unless expressly stated otherwise in the content. The term “or” as used in this specification and the appended claims is generally used to include the meaning of “and / or” unless expressly stated otherwise in the content.
[0038] It should be noted that in this specification, references to "one embodiment," "some embodiments," "other embodiments," etc., may describe embodiments that include one or more features, structures, and / or characteristics. However, such references do not necessarily imply that all embodiments include the specific features, structures, and / or characteristics. Furthermore, when a specific feature, structure, and / or characteristic is described in connection with an embodiment, it should be understood that, whether explicitly described or not, such feature, structure, and / or characteristic may also be used in conjunction with other embodiments unless explicitly stated otherwise.
[0039] The following detailed description should be read with reference to the accompanying drawings, in which similar elements have the same numbering in different drawings. The drawings, which are not necessarily drawn to scale, depict illustrative embodiments and are not intended to limit the scope of the invention.
[0040] Endoscopy is widely used to treat and / or diagnose a variety of conditions. Some of these conditions (such as hemorrhagic ulcers) can be treated by delivering fluid to the treatment site using a syringe in conjunction with an endoscope. Understandably, delivering fluid in conjunction with an endoscope can be challenging. This document discloses systems and apparatuses for delivering fluid in conjunction with an endoscope (e.g., in conjunction with an endoscope).
[0041] Figure 1 An exemplary system 10 for use with endoscope 12 is shown. System 10 can be secured to endoscope 12 and can be used, for example, to deliver fluid to a target object. At least in some cases, the target object can be a hemorrhagic ulcer. Therefore, system 10 can deliver fluid and / or an attachment patch (e.g., a fluid or fluid-like substance that can form an attachment patch), which can, for example, help cover the hemorrhagic ulcer, slow or stop bleeding, reduce perforation, reduce stenosis formation, combinations thereof, etc. In addition to treating hemorrhagic ulcers, system 10 can also be used to treat patients after tissue resection (e.g., endoscopic mucosal resection, endoscopic submucosal dissection, polyp removal, etc.), reinforce sutures, seal fistulas, treat or close transoral endoscopic incision sites, etc. Some additional interventions are considered for using system 10.
[0042] System 10 may include a sleeve 14. Generally, sleeve 14 may be configured to couple to and / or be disposed along the outer surface of endoscope 12. In some cases, sleeve 14 may contain silicone. Other materials are also considered. Sleeve 14 may facilitate securing system 10 to endoscope 12 (e.g., friction fixation). Other mechanisms for securing system 10 to endoscope 12 are also considered, including mechanical bonding, adhesive bonding, thermal bonding, combinations thereof, etc. In some cases, system 10 may be permanently fixed to endoscope 12. In this case, endoscope 12 may be included in system 10. In other cases, system 10 may be attached to endoscope 12. In other words, system 10 may be an add-on component that can be added to endoscope 12.
[0043] A fluid sleeve or housing 16 may be coupled to a sleeve 14. The fluid sleeve 16 may include an inner wall 18 and an outer wall 20. A fluid chamber 22 may be defined within the fluid sleeve 16, for example, between the inner wall 18 and the outer wall 20. The fluid sleeve 16 may have a distal region and / or a distal surface 24. In some cases, the distal surface 24 may be arcuate. One or more openings 26 may be formed on the distal surface 24.
[0044] Generally, the fluid cannula 16 may be configured to contain fluid for delivery to a suitable target location. For example, for an intervention aimed at treating a hemorrhagic ulcer, one or more therapeutic fluids may be contained in the fluid chamber 22. Exemplary fluids may include acrylates, methacrylates, n-butyl 2-cyanoacrylate, other materials and / or adhesives, etc. Such fluids may be present in monomeric form within the fluid chamber 22 and may polymerize to adhere to wound tissue upon delivery and / or contact with tissue. Other fluids may be considered. In at least some cases, the fluids may be biocompatible, at least partially visible and perceptible during the intervention, effective and / or efficient for treating appropriate conditions (e.g., covering a hemorrhagic ulcer, stopping bleeding, etc.), relatively flowable and / or easy to apply, relatively easy to deliver along the digestive tract, combinations thereof, etc. In some cases, the fluid may form an attachment patch and / or otherwise take the form of an attachment patch.
[0045] In some cases, the fluid may comprise multiple portions or components. In this case, the two portions may be kept separate by a partition (not shown) within the fluid chamber 22. Delivery of the two portions results in the portions mixing together and / or combining to form a therapeutic material. For example, one component may include fibrinogen (e.g., lyophilized mixed human fibrinogen) and another may include thrombin (e.g., bovine thrombin, human thrombin, etc.). In some cases, one or both of the components may include calcium salts. A variety of different portions / components are possible.
[0046] System 10 may include a distal annular member 28. In at least some cases, the distal annular member 28 may be disposed within the fluid sleeve 16. The distal annular member 28 may be axially fixed relative to the sleeve 14 and / or relative to the fluid sleeve 16. As will be described in more detail herein, the distal annular member 28 may function similarly to a plunger or plunger tip of a syringe. For example, because the distal annular member 28 may be axially fixed relative to the fluid sleeve 16, movement or translation of the fluid sleeve 16 may move the distal annular member 28 within the fluid sleeve 16 in a manner that facilitates the ejection of fluid contained in the fluid chamber 22 through the opening 26 from the fluid sleeve 16.
[0047] Actuator 30 may be coupled to fluid sleeve 16. For example, actuator 30 may be coupled to and extend proximally from the proximal region of fluid sleeve 16. In some cases, actuator 30 may be a pull cable. Pull cable 30 may be configured to move fluid sleeve 16. In some cases, system 10 may include one actuator 30. In other cases, system 10 may include one or more additional actuators 30.
[0048] One or more coil members 32 may be disposed along the outer surface of the endoscope 12. For example, one or more coil members 32 may be wound around the endoscope 12 and the actuator(s) 30. Thus, the actuator 30 may extend between the one or more coil members 32 and the outer surface of the endoscope 12. Alternatively, one or more coil members 32 may be wound around each actuator 30 and extend proximally along the actuator 30.
[0049] In some cases, system 10 may include a proximal annular member 34. The proximal annular member 34 may be disposed proximal to the distal annular member 28. In some cases, actuator 30 may extend through the proximal annular member 34. Spacer 36 may extend between the distal annular member 28 and the proximal annular member 34. The proximal annular member 34, the distal annular member 28, and the spacer 36 may be axially fixed relative to each other. For example, the proximal annular member 34 may be axially fixed relative to the distal annular member 28 by the spacer 36.
[0050] As described in this article, the fluid sleeve 16 can be as follows: Figures 2 to 3 The device is configured to move relative to endoscope 12 between a first position and a second position. For example, when... Figure 2 When the fluid sleeve 16 is in the first position, the distal annular member 28 can be disposed adjacent to the proximal region of the fluid sleeve 16. When... Figure 3When the fluid sleeve 16 is in the second position, the distal annular member 28 can be positioned distal to the proximal region of the fluid sleeve 16. Since the fluid sleeve 16 is movable relative to the distal annular member 28, the distal annular member 28 can move within the fluid sleeve 16 and function as a plunger to inject fluid from the fluid sleeve 16 through the opening 26.
[0051] Figure 4 A handle 40 coupled to actuator 30 is shown. Generally, handle 40 can be used to move actuator 30 and thus move fluid cannula 16. Handle 40 may include a finger-pull member 42 slidable along handle 44. Thumb member 46 may be disposed at the proximal end of handle 40. Actuator 30 may be coupled to finger-pull member 42 such that retraction of finger-pull member 42 along handle 44 retracts actuator 30 and thus retracts fluid cannula 16. As described above, one or more coil members 32 may be disposed around endoscope 12, or as... Figure 4 As shown, one or more coil components 32 may be wound around the actuator 30. Figure 4 The diagram shows one or more coil members 32 from which the actuator 30 extends distally. In practice, one or more coil members 32 may extend from the handle 40 to the proximal annular member 34.
[0052] Figure 5 Another exemplary system 110 is shown, which is similar in form and function to other systems disclosed herein for use with endoscope 12. System 110 may include a sleeve 114. Generally, sleeve 114 may be configured to couple to and / or be disposed along the outer surface of endoscope 12. In some cases, sleeve 114 may contain silicone. Other materials are also considered. Sleeve 114 may facilitate securing system 110 to endoscope 12 (e.g., friction fixation). Other mechanisms for securing system 110 to endoscope 12 are also considered, including mechanical bonding, adhesive bonding, thermal bonding, combinations thereof, etc. In some cases, system 110 may be permanently fixed to endoscope 12. In this case, endoscope 12 may be included in system 110. In other cases, system 110 may be attached to endoscope 12. In other words, system 110 may be an add-on component that can be added to endoscope 12.
[0053] A fluid sleeve or housing 116 may be coupled to a sleeve 114. The fluid sleeve 116 may include an inner wall 118 and an outer wall 120. A fluid chamber 122 may be defined within the fluid sleeve 116, for example, between the inner wall 118 and the outer wall 120. The fluid sleeve 116 may have a distal region and / or a distal surface 124. In some cases, the distal surface 124 may be arcuate. One or more openings 126 may be formed on the distal surface 124. Similar to the fluid sleeve 16, the fluid sleeve 116 may be configured to contain fluid for delivery to a suitable target location.
[0054] System 110 may include a distal annular member or a distal annular region 128. In at least some cases, the distal annular region 128 may be disposed within the fluid sleeve 116. The distal annular region 128 may be axially fixed relative to the sleeve 114 and / or relative to the fluid sleeve 116. As will be described in more detail herein, the distal annular region 128 may function similarly to a plunger or plunger tip. For example, since the distal annular region 128 may be axially fixed relative to the fluid sleeve 116, movement or translation of the fluid sleeve 116 may move the distal annular region 128 within the fluid sleeve 116 in a manner that facilitates the ejection of fluid contained in the fluid chamber 122 through the opening 26 from the fluid sleeve 116.
[0055] Actuator 130 may be coupled to fluid cannula 116. For example, actuator 130 may be coupled to and extend proximally from the proximal region of fluid cannula 116. In some cases, actuator 130 may be a pull cable. Pull cable 130 may be configured to move fluid cannula 116. In some cases, system 110 may include one actuator 130. In other cases, system 110 may include one or more additional actuators 130. In some cases, one or more coil members (not shown) may be disposed along the outer surface of endoscope 12 and / or wound around each actuator 130.
[0056] In some cases, system 110 may include a proximal annular member or a proximal annular region 134. The proximal annular region 134 may be located proximal to the distal annular region 128. In some cases, actuator 130 may extend through the proximal annular region 134. A spacer member or spacer region 136 may extend between the distal annular region 128 and the proximal annular region 134. The proximal annular region 134, the distal annular region 128, and the spacer region 136 may be axially fixed relative to each other.
[0057] In some cases, the proximal annular region 134, the spacer region 136, and the distal annular region 128 may be a single structure with three segments. For example, the proximal annular region 134 may have an outer diameter that is wider than the remaining segments and may be located proximal to the fluid sleeve 116. The distal annular region 128 may be located within the fluid sleeve 116. The spacer region 136 may extend between the proximal annular region 134 and the distal annular region 128, coupling the proximal annular region 134 to the distal annular region 128.
[0058] As described in this article, Figures 6 to 7 As shown, the fluid cannula 116 can be configured to move relative to the endoscope 12 between a first position and a second position. For example, when... Figure 6 When the fluid sleeve 116 is in the first position, the distal annular region 128 can be disposed adjacent to the proximal region of the fluid sleeve 116. When... Figure 7 When the fluid sleeve 116 is in the second position, the distal annular region 128 can be positioned distal to the proximal region of the fluid sleeve 116. Since the fluid sleeve 116 is movable relative to the distal annular region 128, the distal annular region 128 can move within the fluid sleeve 116 and function as a plunger to inject fluid from the fluid sleeve 116 through the opening 126.
[0059] Materials suitable for use in the components of System 10 (and / or other systems disclosed herein) may include materials typically associated with medical devices. For example, the system may include components made of metals, metal alloys, polymers (some examples of which are disclosed below), metal-polymer composites, ceramics, combinations thereof, or other suitable materials. Some examples of suitable polymers may include polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene (ETFE), fluorinated ethylene propylene (FEP), polyoxymethylene (POM, e.g., DELRIN® available from DuPont), polyether block esters, polyurethanes (e.g., polyurethane 85A), polypropylene (PP), polyvinyl chloride (PVC), polyether esters (e.g., ARNITEL® available from DSM Engineering Plastics), ether- or ester-based copolymers (e.g., butene / poly(alkylene ether) phthalates and / or other polyester elastomers, e.g., HYTREL® available from DuPont), polyamides (e.g., DURETHAN® available from Bayer or Elf...). Atochem's CRISTAMID®, elastomer polyamides, block polyamides / ethers, polyether block amides (PEBA, e.g., available under the trade name PEBAX®), ethylene vinyl acetate copolymers (EVA), silicones, polyethylene (PE), high-density polyethylene, low-density polyethylene, linear low-density polyethylene (e.g., REXELL®), polyesters, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), 1,3-propylene terephthalate, polyethylene naphthalate (PEN), polyether ether ketone (PEEK), polyimide (PI), polyether imide (PEI), polyphenylene sulfide (PPS), polyphenylene ether (PPO), poly(p-phenylene terephthalamide) (e.g., KEVLAR®), polysulfone, nylon, nylon-12 (e.g., available from EMS American) Grilon obtains GRILAMID®, perfluoro(propyl vinyl ether) (PFA), ethylene-vinyl alcohol, polyolefins, polystyrene, epoxy resins, polyvinylidene chloride (PVdC), poly(styrene-isobutylene-styrene) (e.g., SIBS and / or SIBS 50A), polycarbonates, ionomers, biocompatible polymers, other suitable materials, or mixtures, combinations, copolymers, polymer / metal composites, etc. In some embodiments, the sheath may be blended with a liquid crystal polymer (LCP). For example, the blend can contain up to about 6% LCP.
[0060] Some examples of suitable metals and metal alloys include: stainless steels such as 304V, 304L, and 316LV stainless steels; mild steels; nickel-titanium alloys such as linear elastic and / or hyperelastic nickel-titanium; other nickel alloys such as nickel-chromium-molybdenum alloys (e.g., UNS: N06625, such as INCONEL® 625; UNS: N06022, such as HASTELLOY® C-22®; UNS: N 10276, such as HASTELLOY® C276®; other HASTELLOY® alloys, etc.), nickel-copper alloys (e.g., UNS: N04400, such as MONEL® 400; NICKELVAC® 400, NICORROS® 400, etc.), nickel-cobalt-chromium-molybdenum alloys (e.g., UNS: R30035, such as MP35-N®, etc.), and nickel-molybdenum alloys (e.g., UNS: N10665, such as HASTELLOY® ALLOY). B2®), other nickel-chromium alloys, other nickel-molybdenum alloys, other nickel-cobalt alloys, other nickel-iron alloys, other nickel-copper alloys, other nickel-tungsten or tungsten alloys, etc.; cobalt-chromium alloys; cobalt-chromium-molybdenum alloys (e.g., UNS:R30003, such as ELGILOY®, PHYNOX®, etc.); platinum-enriched stainless steels; titanium; combinations thereof; etc.; or any other suitable material.
[0061] It should be understood that this disclosure is illustrative in many respects. Variations may be made in details, particularly in the shape, size, and arrangement of steps, without departing from the scope of this disclosure. To the appropriate extent, this may include the use of any feature of an exemplary embodiment used in other embodiments. Of course, the scope of the invention is defined by the language of the appended claims.
Claims
1. A system for use with an endoscope, the system comprising: A sleeve, which is configured to be coupled to the outer surface of the endoscope; A housing coupled to the sleeve, the housing having a proximal region, a distal region, and a fluid chamber defined therein; Multiple openings are formed in the distal region; An actuator coupled to the proximal region of the housing and extending therefrom proximally; A distal annular member is disposed within the housing and is axially fixed relative to the sleeve and relative to the housing. and The housing is configured to move relative to the endoscope between a first position and a second position.
2. The system of claim 1, wherein the sleeve comprises silicone.
3. The system according to claims 1 to 2, wherein the housing comprises an inner wall and an outer wall, and wherein the fluid chamber is defined between the inner wall and the outer wall.
4. The system according to any one of claims 1 to 3, wherein the distal region of the housing is arc-shaped.
5. The system according to any one of claims 1 to 4, wherein the actuator comprises a pull wire.
6. The system according to any one of claims 1 to 5, further comprising one or more additional actuators.
7. The system according to any one of claims 1 to 6, further comprising a proximal annular member configured to surround the endoscope and positioned proximal to the distal annular member.
8. The system of claim 7, further comprising a spacer extending between the distal annular member and the proximal annular member.
9. The system according to any one of claims 7 to 8, wherein the actuator extends through the proximal annular member.
10. The system according to any one of claims 1 to 9, further comprising one or more coil members configured to surround the endoscope.
11. The system of claim 10, wherein the actuator is disposed between the one or more coil members and the outer surface of the endoscope.
12. The system according to any one of claims 1 to 11, wherein when the housing is in the first position, the distal annular member is disposed adjacent to the proximal region of the housing.
13. The system of claim 12, wherein when the housing is in the second position, the distal annular member is disposed distal to the proximal region of the housing.
14. A system for use with an endoscope, the system comprising: A sleeve, which is configured to be coupled to the outer surface of the endoscope; A fluid sleeve coupled to the sleeve, the fluid sleeve including an inner wall member, an outer wall member, a fluid chamber defined between the inner wall member and the outer wall member, and an arcuate distal surface having a plurality of openings formed therein; A distal annular member is disposed within the fluid sleeve, and the distal annular member is axially fixed relative to the endoscope. The fluid sleeve is configured to move between a first position and a second position; When the fluid sleeve is in the first position, the distal annular member is disposed adjacent to the proximal region of the fluid sleeve; When the fluid sleeve is in the second position, the distal annular member is disposed distal to the proximal region of the fluid sleeve. as well as An actuator, coupled to and extending proximally therefrom, is configured to move the fluid sleeve between the first position and the second position.
15. The system of claim 14, further comprising a proximal annular member configured to surround the endoscope and positioned proximal to the distal annular member.