CN216823610U - Access assembly for receiving an endoscope - Google Patents
Access assembly for receiving an endoscope Download PDFInfo
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- CN216823610U CN216823610U CN202123453448.3U CN202123453448U CN216823610U CN 216823610 U CN216823610 U CN 216823610U CN 202123453448 U CN202123453448 U CN 202123453448U CN 216823610 U CN216823610 U CN 216823610U
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Abstract
The present application relates to an access assembly for receiving an endoscope, comprising a tubular body, a proximal seal, a distal seal, a vacuum suction, and one or more fluid supply passageways. The proximal and distal seals are sealed to the proximal and distal ends of the tubular body, respectively. The vacuum suction piece is respectively connected with the vacuum suction source and the cavity of the access assembly. Each fluid supply passage includes a fluid input port, a fluid exhaust port, and a fluid conduit in fluid communication with both. A fluid line is arranged on said inner wall of the tubular body and formed by the surrounding of the resilient sheet and at least part of the inner wall of the tubular body, the fluid line extending at least partly in said longitudinal axis direction.
Description
Technical Field
The present application relates to the field of medical devices, particularly to an access assembly for receiving an endoscope, and more particularly to an access assembly for receiving an endoscope that includes an inflatable flow channel therein.
Background
Minimally invasive surgical procedures, such as endoscopic surgery, may reduce the invasiveness of the surgical procedure. Endoscopic surgery involves surgery through the body wall, for example, to view and/or operate on the ovary, uterus, gallbladder, intestines, kidney, appendix, etc. There are many common endoscopic surgical procedures including, for example, arthroscopy, laparoscopy, gastroenterology, and laryngobronchoscopy. In these methods, a puncture cone through an access assembly is used to create an incision in a body surface of a patient to a target location, and endoscopic surgery is performed through the incision. After forming the puncture, the access assembly extends through the incision into the body cavity and remains in the body cavity, while the puncture cone is withdrawn from the access assembly to provide access to the endoscopic surgical tool. A camera or endoscope is inserted through the access assembly to allow visual inspection and magnification of the body cavity. The surgeon may then perform diagnosis and/or treatment at the surgical site with the aid of specialized instruments (such as forceps, graspers, cutters, applicators, etc.) designed to fit through the additional cannula.
In use, the lens of the endoscope may become covered by aggregates, tissues, blood, other bodily fluids, etc. within the body cavity. It is difficult to keep the lens of the endoscope clean during the procedure. Conventionally, a surgeon (such as an endoscope operator) withdraws the endoscope from an incision in the patient's body via the access assembly and washes the lens with a pre-prepared saline solution at body temperature, and then wipes the endoscope body with a disinfectant such as iodophor and reinserts it into the incision in the patient's body via the access assembly. The time required to clean the lens during the surgical procedure may increase the overall time of the procedure and the amount of time the patient needs to remain anesthetized, and this may result in an increased risk of infection and increased recovery time due to the repeated withdrawal and insertion of the endoscope into the incision on the patient's body. While some access assemblies exist that are capable of irrigating the lens of an endoscope with fluid within the body cavity, these access assemblies are not accepted by most surgeons and are not in widespread use because they directly drain irrigation fluid with condensate, tissue, blood and other body fluids, etc. into the body cavity of the patient.
To avoid removing the endoscope for cleaning during surgery without the cleaning fluid entering the patient's body cavity, and to clean the lens of the endoscope by means of a jet of fluid inside the access assembly, it is necessary to transport the fluid from an external fluid source to the jet location through a fluid line. Such fluid lines need to be provided inside the access assembly, since an increase in the outer dimensions of the access assembly would undesirably enlarge the cut-outs. However, during the lancing process, the diameter of the employed puncture cone (e.g., 12.7mm) is often only slightly smaller than the inner diameter of the access assembly (e.g., 13.0 mm). Accordingly, the fluid line is required to occupy only a small portion of the inner diameter of the access assembly during the puncturing procedure. However, if the cross-sectional area of the fluid line is too small, too much resistance is caused when the lens of the endoscope is cleaned with the sprayed fluid, so that the fluid flow rate and the cleaning effect are affected, or too high a demand is imposed on the pressurizing capacity of the fluid source. Notably, the diameter of the endoscope (e.g., 10.0mm) is typically smaller than the diameter of the puncture cone, which means that the fluid flow channel is allowed to occupy relatively more space within the access assembly during use of the endoscope to view a surgical field or to clean the lens of the endoscope. It can be seen that there exists a need in the art for an improved access assembly for an endoscope that allows for a larger sized penetrator to pass therethrough while providing for a better cleaning of the lens of the endoscope with ejected fluid.
SUMMERY OF THE UTILITY MODEL
An access assembly for receiving an endoscope may include a tubular body, a proximal seal, a distal seal, a vacuum suction, and one or more fluid supply passageways. The tubular body may be configured to extend along a longitudinal axis of the access assembly and for receiving an endoscope. The proximal seal may be sealingly connected with the proximal end of the tubular body and the distal seal may be sealingly connected with the distal end of the tubular body, wherein the inner wall of the tubular body, the distal surface of the proximal seal, and the proximal surface of the distal seal collectively define a cavity of the access assembly. The cavity of the access assembly defines an environment in which the access assembly is at least partially sealed from the outside (such as air, a body cavity of a patient) to create a pressure differential between the inside and outside of the cavity. The vacuum suction piece may be configured to be connected with a vacuumThe suction source is connected with the cavity of the access assembly respectively. Each of the one or more fluid supply passageways can include a fluid input port, a fluid exhaust port, and a fluid conduit fluidly connecting the fluid input port and the fluid exhaust port. The fluid supply path may receive fluid from outside the access assembly and may be, for example, CO2To the outside of the cavity of the access assembly (e.g., in a patient's body cavity), or to discharge a liquid fluid, such as saline, into the cavity of the access assembly to clean the lens of the endoscope. The fluid line may be arranged on an inner wall of the tubular body and be formed by the resilient sheet being enclosed by at least part of the inner wall of the tubular body and extending at least partly in the direction of the longitudinal axis. The fluid conduit is at least partially sealed relative to the remainder of the cavity of the access assembly to create a pressure differential between within the cavity and within the fluid conduit to control the direction of deformation and bending of the flexible sheet of the fluid conduit.
In some embodiments, the resilient sheet is configured to have a first state and a second state. When the pressure in the cavity of the access assembly is not lower than the pressure in the fluid line, the elastic sheet is in a first state. At this time, the elastic pieces are bent radially outward toward the inner wall of the tubular body in a cross section perpendicular to the longitudinal axis of the tubular body. Thus, the resilient tab at least partially clears the space within the tubular body, thereby facilitating the passage of larger diameter tools (such as puncture cones). When the pressure in the cavity of the access assembly is lower than the pressure in the fluid line, the resilient tab is in the second state. At this point, the resilient tab is at least partially elastically deformed to bend radially inwardly away from the inner wall of the tubular body such that the cross-sectional area of the fluid conduit in a cross-section perpendicular to the longitudinal axis of the tubular body is increased. The increased cross-sectional area of the fluid conduit reduces the resistance of the fluid passing through the fluid conduit to increase the flow rate of the fluid at a constant source pressure, thereby enhancing the cleaning of the distal end of the endoscope by the fluid or to remove contaminants such as CO2The velocity of the gas being discharged into the body cavity of the patient.
In some embodiments, the one or more fluid supply passageways include a first fluid supply passageway including a first fluid input port for receiving a first fluid, a first fluid output port, and a first fluid conduit fluidly connecting the first fluid input port and the first fluid output port, the first fluid output port being located within the cavity of the access assembly. The first fluid supply path may be used to drain a liquid fluid, such as saline, into the cavity of the access assembly to clean the lens of the endoscope.
In some embodiments, the first fluid discharge port is located on an inner wall of the tubular body. In this case, the distal seal may be formed separately from the first fluid conduit and may not have any fluid discharge ports, and a liquid fluid such as saline may be discharged from the inner wall of the tubular body (e.g., at a location near the distal end) for cleaning the lens of the endoscope.
In some embodiments, the first fluid discharge port is located on a proximal surface of the distal seal. In this case, the distal seal may be made integrally with the first fluid conduit, and a liquid fluid, such as saline, may flow via the first fluid conduit to a first fluid discharge port located on a proximal surface of the distal seal for cleaning a lens of the endoscope. Since liquid fluid may be proximally ejected from the proximal surface of the distal seal, the cleaning effect of an access assembly having a first fluid discharge port according to this embodiment may be independent of the orientation angle of the access assembly (such as upright, inclined, horizontal, at least partially inverted, etc.).
In some embodiments, the one or more fluid supply passageways further comprise a second fluid supply passageway comprising a second fluid input port for receiving a second fluid, a second fluid output port, and a second fluid conduit fluidly connecting the second fluid input port and the second fluid output port, the second fluid output port being located outside the cavity of the access assembly. The second fluid line may be for connecting a fluid such as CO2To the exterior of the access assembly, such as in a body cavity of a patient.
In some embodiments, the second fluid discharge port may be an opening of the second fluid conduit at a distal end thereof to discharge, for example, CO2Of the second fluid from the tubular shapeThe distal end of the interior of the body discharges into the exterior of the access assembly, such as a body cavity of a patient. It will be appreciated that the opening at the distal end of the second fluid line accesses the outside of the cavity of the assembly, as will be described in more detail below with reference to the accompanying drawings. In other embodiments, the second fluid discharge port may be an aperture formed on an outer wall of the tubular body to discharge the second fluid from outside the tubular body.
In some embodiments, two or all three of the elastomeric sheet of the first fluid conduit, the elastomeric sheet of the second fluid conduit and the distal seal are integrally formed of a medical grade elastomeric material so as to be conveniently disposable and integrally mountable to the tubular body.
In some embodiments, the central angle of the first and second fluid lines in a cross-section perpendicular to the longitudinal axis of the tubular body may be between 10 ° and 180 °. In some embodiments, the first fluid conduit and the second fluid conduit may have a central angle of 90 ° in a cross-section perpendicular to the longitudinal axis of the tubular body. When the angle between the first and second fluid lines is small, the interior of the tubular body can accommodate larger diameter devices (such as a puncture cone, an endoscope), but some distance needs to be maintained between the two to provide sufficient width for the first and second fluid lines and to facilitate connection of the first and second fluid input ports to respective fluid sources.
In some embodiments, a sealing body is provided on the resilient sheet, and the sealing body is configured to sealingly connect an edge of a side of the resilient sheet facing the inner wall of the tubular body to form a fluid conduit.
In some embodiments, the sealing body includes a glue groove disposed at an edge of the elastic sheet and a sealing glue filled in the glue groove for sealingly adhering an edge of a side of the elastic sheet facing the inner wall of the tubular body to form the fluid line.
In some embodiments, the inner wall of the tubular body may have one or more grooves thereon extending in the direction of the longitudinal axis along the inner wall of the tubular body and each configured to at least partially accommodate at least a portion of a respective fluid line of the one or more fluid supply passageways. By accommodating at least part of the fluid line in a recess on the inner wall of the tubular body, the space occupied by the fluid line within the tubular body may be further reduced in order to accommodate larger diameter devices.
Drawings
FIG. 1 is a cross-sectional side view of an access assembly for an endoscope according to an embodiment of the present application;
FIG. 2A is a top view of the access assembly for an endoscope of FIG. 1 in a state with the fluid lines retracted;
FIG. 2B is a top view of the access assembly for an endoscope of FIG. 1 in a fluid line inflated state;
FIG. 3A is a schematic illustration of a first side view angle of an assembly of a resilient tab of a first fluid conduit, a resilient tab of a second fluid conduit and a distal seal of an access assembly for an endoscope according to an embodiment of the present application;
FIG. 3B is a schematic illustration of a second side view angle of the combination of the resilient tab of the first fluid conduit, the resilient tab of the second fluid conduit and the distal seal shown in FIG. 3A;
FIG. 4A is a top view schematically illustrating an access assembly for an endoscope including two fluid supply channels in a fluid line collapsed state, according to an embodiment of the present application; and
FIG. 4B is a top view schematically illustrating an access assembly for an endoscope including two fluid supply channels in a fluid line inflated state, according to an embodiment of the present application.
Detailed Description
An access assembly having an inflatable flow channel for intraoperative cleaning of a lens of an endoscope 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 a direction (such as below generally shown in fig. 1, 3A, and 3B) in which the endoscope, portion of the access assembly, or component thereof is farther from an operator (e.g., a physician), e.g., "distal" is the direction of insertion of the endoscope, and "distal" is one end of the direction of insertion of the endoscope; while the term "proximal" refers to a direction in which the endoscope, portion of the access assembly, or component thereof, is closer to the operator (such as above as generally shown in fig. 1, 3A, and 3B), e.g., "proximal" is the direction in which the endoscope is withdrawn and "proximal" is one end of the direction in which the endoscope is withdrawn. In addition, the term "endoscope" is used interchangeably generally with laparoscope, arthroscope, gastroenteroscope, laryngobronchoscope, or any other device for viewing a body cavity of a patient through a small diameter incision or cannula. As used herein, the term "fluid" is intended to broadly refer to a substance having a fluidity, including, but not limited to, liquids (such as, pure liquids, solutions, colloids, suspensions), gases, gas-liquid two-phase flow mixtures, plasmas, fluidized solid particles, and the like. As used herein, the term "about" means that the numerical values are approximate and that small variations will not significantly affect the practice of the disclosed aspects of the disclosure. Where numerical limitations are used, "about" means that the numerical values can vary by ± 10% and still be within the scope of the disclosure, unless the context indicates otherwise.
According to the present disclosure, a larger diameter penetrator is permitted to pass through an access assembly for an endoscope during penetration. Simultaneously, during surgery, the lens of the endoscope can be cleaned efficiently in real time without the need to remove the endoscope entirely from the access assembly. As described in further detail below.
Fig. 1 is a cross-sectional side view of an access assembly 100 for an endoscope 200 according to an embodiment of the present application. The access assembly 100 may include a tubular body 110, a proximal seal 130, a distal seal 150, a vacuum suction 190, and one or more fluid supply passageways 170. The tubular body 110 may be configured to extend along a longitudinal axis Z-Z' of the access assembly 100 and for receiving the endoscope 200, and may have generally cylindrical inner and outer shapes. As used herein, a "tubular body" may also include a conical portion on its proximal side to facilitate gripping and engagement with the proximal seal 130, as shown in fig. 1.
The proximal seal 130 may be configured to seal to the proximal end of the conical portion of the tubular body 110 and to the sidewall 220 of the endoscope 200 as the endoscope 200 is passed therethrough. The distal seal 150 may be configured to seal the distal end of the tubular body 110. The inner wall 112 of the tubular body 110, the distal surface of the proximal seal 130, and the proximal surface of the distal seal 150 collectively define a cavity of the access assembly 100 to form an interior space that is generally isolated from the external atmosphere proximal to the access assembly 100 and the patient's body cavity distal thereto. Further, the patient's body cavity may be pressurized above the cavity of the access assembly 100 by way of an artificial pneumoperitoneum or the like to prevent substances within the cavity of the access assembly 100 from passing through the distal seal 150 into the patient's body cavity. In some embodiments, the distal seal 150 may be configured to partially flare and form a seal against the sidewall 220 of the endoscope 200 as the endoscope 200 is passed therethrough to keep the body cavity of the patient isolated from the cavity of the access assembly 100 while viewing the surgical field with the endoscope 200. In some embodiments, the distal seal 150 may comprise a plurality of seal flaps that may be opened and closed to achieve the sealing effect described above. In some embodiments, the distal seal 150 may seal unidirectionally. In other words, the distal seal 150 may allow for fluids (such as CO for artificial pneumoperitoneum)2) Passes from the exterior of the access assembly 100 (such as a patient's body cavity) into the cavity of the access assembly 100 under the influence of a pressure differential directed from the cavity of the access assembly 100 to the exterior of the access assembly 100, but does not allow fluid to exit from the cavity of the access assembly 100 to the exterior of the access assembly 100 (such as a patient's body cavity) under the influence of a pressure differential directed from the exterior of the access assembly 100 to the cavity of the access assembly 100.
The vacuum port 195 of the vacuum suction piece 190 may be connected to a vacuum suction source to provide suction, and the vacuum port 195 may be connected via a vacuum line 193 to a suction port 191 arranged within the cavity of the access assembly 100 for evacuating cleaning fluid, dirt, gas, etc. therefrom from the cavity. In one embodiment, the vacuum port 191 is directly connected to a vacuum source. Each of the one or more fluid supply passages 170 may include a flow for receiving fluid from a fluid sourceA body input port 171, a fluid exhaust port 173 for exhausting fluid into the cavity of the access assembly 100, and a fluid conduit 175 fluidly connecting the fluid input port 171 with the fluid exhaust port 173. The fluid supply pathway 170 may receive fluid from outside the access assembly 100 and may be, for example, CO2To the patient's cavity, or to discharge a liquid fluid, such as saline, into the cavity of the access assembly 100 to clean the lens of the endoscope 200. The respective fluid conduits 175 of the fluid supply passage 170 may be disposed on the inner wall 112 of the tubular body 110 and include a resilient sheet and a sealing body, as will be described further below with reference to fig. 2A-3B.
Fig. 2A is a top view of the access assembly 100 of fig. 1 for an endoscope 200 in a retracted state of the fluid line 175. The resilient tab 176 of the fluid conduit 175 may extend in the longitudinal axis Z-Z' direction along at least a portion of the inner wall of the tubular body 110 and may be configured to flex radially outward at least partially toward the inner wall 112 of the tubular body 110. A sealing body (not shown in fig. 2A-2B) may be arranged at a periphery of a side of the resilient tab 176 facing the inner wall 112 of the tubular body 110, and may be configured to seal a periphery of a side of the resilient tab 176 facing the inner wall 112 of the tubular body 110 to the inner wall 112 of the tubular body 110 of the access assembly 100 to form a fluid conduit 175 enclosed between the inner wall 112 of the tubular body 110 of the access assembly 100 and the resilient tab 176. The fluid conduit 175 is at least partially sealed from the rest of the cavity of the access assembly 100 to facilitate a pressure differential between the interior of the cavity and the interior of the fluid conduit 175 to control the deformation and bending direction of the flexible sheet 176 of the fluid conduit 175 to change between the first state and the second state.
In some embodiments, when the pressure within the cavity of the access assembly 100 is not lower than the pressure within the fluid conduit 175, the flexible sheet 176 is in a first state, flexing radially outward toward the inner wall 112 of the tubular body 110 in a cross-section perpendicular to the longitudinal axis of the tubular body 110 (as shown in fig. 2A), such that the fluid conduit 175 is in a contracted state. In this case, the fluid conduit 175 occupies only a small portion (such as 0.1-0.3 mm) of the inner diameter D (such as 13.0mm) within the tubular body 110 to facilitate passage of a tool (not shown) of larger diameter D1 (such as a 12.7mm diameter puncture cone).
Fig. 2B is a top view of the access assembly 100 of fig. 1 in an inflated state of the fluid line 175 for the endoscope 200. As an example, during a surgical procedure, when the lens of the endoscope 200 is covered by smoke, condensation, tissue, blood, other bodily fluids, etc. within the body cavity of a patient, affecting the surgical field of view, an intra-operative cleaning procedure may be performed using the access assembly 100 according to the present application without having to remove the entire endoscope 200 from the access assembly 100. During the cleaning process, the distal end 240 of the endoscope 200 is first proximally retracted into the cavity of the access assembly 100, as indicated by arrow a in fig. 1. In this case, the tubular body 110, the proximal seal 130 and the distal seal 150 seal against one another to form a cavity isolated from the exterior to receive at least the distal end 240 of the endoscope 200 therein. At this point, the pressure within the fluid line 175 is made greater than the pressure within the cavity of the access assembly 100 by suctioning the cavity of the access assembly 100 via the vacuum suction piece 190 and/or by supplying pressurized fluid into the fluid line 175 via the fluid input ports 171 of the fluid supply passage 170. In this case, due to this pressure difference, the resilient tab 176 of the fluid conduit 175 is deformed from the first state shown in fig. 2A to the second state, i.e. from being bent radially outwards towards the inner wall 112 of the tubular body 110 to being bent radially inwards away from the inner wall 112 of the tubular body 110 shown in fig. 2B, thereby increasing the cross-sectional area of the fluid conduit 175 in a cross-section (as shown in fig. 2B) perpendicular to the longitudinal axis Z-Z' of the access assembly 100. The increased cross-sectional area of fluid conduit 175 provides a reduced resistance to fluid flow through fluid conduit 175. This may increase the flow rate of the fluid at a constant source pressure, thereby enhancing the cleaning power of the fluid on the distal end of the endoscope or will be, for example, CO2The velocity of the gas being discharged into the body cavity of the patient. Alternatively, with a constant fluid flow rate, the requirement for pressurizing the fluid source may be reduced due to the reduced resistance. In this case, the common equipment of the operating room, such as a saline infusion bottle, can be used as the fluid source without having to provide an additional pressure source, such as a pump. It will be appreciated that the elastomeric sheet 176 may be formed from a material having a lower modulus of elasticity than the tubeThe medical grade material of the tubular body 110 is made so as to deform at the lower pressure differential described above without significantly affecting the shape of the tubular body 110.
Notably, since the diameter of the endoscope 200 (such as 10.0mm) tends to be smaller than the diameter of the puncture cone (such as 12.7mm), the additional space within the tubular body 110 (such as 0.8-1mm) occupied by the inflated fluid conduit 175 does not affect the activity of the endoscope 200 with the access assembly 100 housing the endoscope 200.
The overall path of travel of fluid from the fluid source during the cleaning process is shown by the series of dashed arrows F in fig. 1. First, the fluid input port 171 receives fluid from a fluid source and directs the fluid to the fluid line 175. Fluid then flows in a proximal to distal direction in the fluid conduit 175 to the fluid exit port 173 and is ejected from the fluid exit port 173 into the cavity of the access assembly 100 to clean the distal end 240 of the endoscope 200. Thereafter, under negative pressure suction from a vacuum suction source connected to the vacuum port 195, a mixture of fluid and dislodged soil is drawn from the suction port 191 within the cavity of the access assembly 100 to exit the access assembly via the vacuum line 193 and the vacuum port 195 in turn.
After cleaning is complete, the fluid supply from the fluid source to fluid input port 171 can be stopped, and then the distal end 240 of endoscope 200 can be extended out of access assembly 100, e.g., into a body cavity of a patient, through distal seal 150 to view the surgical field. After the supply of fluid from the fluid source is stopped, and before or after the distal end 240 of the endoscope 200 is extended, suction from the vacuum suction source can be stopped. In either case, the residual negative pressure within the cavity of the access assembly 100 may ensure that cleaning fluid and contaminants do not pass through the distal seal 150 to the exterior of the access assembly 100, such as into the patient's cavity. In some embodiments, during the extension of the distal end 240 of the endoscope 200 through the distal seal 150, the distal seal 150 may at least partially scrape off liquid on the distal end 240 (such as the lens) of the endoscope 200 and form a liquid film, thereby improving visibility and extending anti-fog time.
In some embodiments, the one or more fluid supply passages may include a first fluid supply passage and a second fluid supply passage. The first fluid supply path may include a first fluid input port (not shown) for receiving a first fluid, a first fluid exhaust port (not shown), and a first fluid conduit 175 fluidly connecting the first fluid input port with the first fluid exhaust port, as described in more detail below with reference to fig. 4A and 4B. Similarly, the second fluid supply path may include a second fluid input port (not shown) for receiving a second fluid, a second fluid exhaust port (not shown), and a second fluid line 175' fluidly connecting the second fluid input port with the second fluid exhaust port, as described in more detail below with reference to fig. 4A and 4B.
Fig. 3A is a schematic illustration of a first side view angle of an assembly of a resilient tab 176 (front view) of a first fluid conduit 175, a resilient tab 176 '(side view) of a second fluid conduit 175' and a distal seal 150 of an access assembly 100 for an endoscope 200 according to an embodiment of the present application to show a front face of the resilient tab 176 according to an embodiment. Fig. 3B is a schematic diagram of a second side view angle of the combination of the resilient tab 176 (side view), the resilient tab 176 '(front view) of the first fluid conduit 175, the resilient tab 176' (front view) of the second fluid conduit 175 'and the distal seal 150 of the access assembly 100 of the endoscope 200 shown in fig. 3A to show a front face of the resilient tab 176' according to an embodiment.
In some embodiments, as shown in fig. 3A and 3B, two or all three of the flexible sheet 176 of the first fluid conduit 175, the flexible sheet 176 'of the second fluid conduit 175', and the distal seal 150 may be integrally formed as an assembly from a (e.g., medical grade) elastomeric material, such that they may be conveniently installed in one piece inside the tubular body 110 at a time. In some embodiments, specially designed tooling (not shown) may be employed to support the various parts of the assembly so as to extend from the distal end of the tubular body 110 into and seal against the inner wall 112 of the tubular body 110. In other embodiments, the elastomeric strip and/or the sealing body may have a stiffness in the direction of the longitudinal axis Z-Z' to facilitate insertion into the distal end of the tubular body 110 without affecting deformation of the elastomeric strip in the radial direction. In other embodiments, two or all three of the resilient tab 176 of the first fluid conduit 175, the resilient tab 176 'of the second fluid conduit 175', and the distal seal 150 may also be separately formed and mounted individually to the interior of the tubular body 110. It will be appreciated that in this case, the resilient tab 176 'and the distal seal 150 may be more flexibly used with tubular bodies 110 having different lengths and/or two fluid conduits 175, 175' having different central angles centered on the central axis of the access assembly.
In some embodiments, the first fluid outlet 173 of the first fluid supply passageway may be located within the cavity of the access assembly 100 to discharge the first fluid from the first fluid source into the cavity of the access assembly 100. In some other embodiments, the first fluid discharge 173 of the first fluid supply passage may be located on the proximal surface of the distal seal 150. In some embodiments, the first fluid discharge 173 on the proximal surface of the distal seal 150 may be proximally directed along the longitudinal axis Z-Z' of the access assembly 100. When the distal end 240 of the endoscope 200 is proximally retracted into the cavity of the access assembly 100, the distal end 240 of the endoscope 200 (such as the lens) may be cleaned with a first fluid ejected in a proximal direction from the first fluid outlet 173 (as indicated by arrow B in fig. 3A). It will be appreciated that in this case, the distal end 240 of the endoscope 200 need not be aligned in a certain position along the longitudinal axis Z-Z' since the first fluid is ejected in a proximal direction, thereby improving the ease of cleaning operations. Furthermore, in this case, the cleaning effect is not affected by the orientation angle of the access assembly 100 (such as upright, tilted, horizontal, at least partially inverted, etc.), as the first fluid ejected in the proximal direction is always able to be ejected to the distal end 240 of the endoscope 200.
Although the first fluid discharge port 173 is shown on the proximal surface of the distal seal 150 in fig. 1 and 3A, embodiments according to the present application are not limited thereto. In some embodiments, the first fluid discharge outlet may be located on the inner wall 112 of the tubular body 110, for example, at a location near the distal end of the inner wall 112 of the tubular body 110. In this case, the distal end 240 of the endoscope 200 (such as the lens) may be cleaned with the first fluid ejected from the first fluid discharge port when the distal end 240 of the endoscope 200 is proximally retracted into the cavity of the access assembly 100 near the location of the first fluid discharge port aligned along the longitudinal axis Z-Z'. In this case, the distal seal 150 may be formed separately from the first fluid conduit 175 (not shown) and need not be designed with any fluid discharge ports.
By way of example, the first fluid may be a liquid such as saline and may be maintained at a similar temperature to the patient's body cavity, so that the distal end 240 of the endoscope 200 after cleaning is also maintained at that temperature to avoid condensation of water mist. Alternatively, the first fluid may also be a liquid such as saline with a fluid such as CO2The gas-liquid two-phase mixture of gases of (1) is premixed and then fed to the first fluid inlet. Due to the discontinuous liquid phase in the gas-liquid two-phase mixture, a pulsed scouring effect can be generated at the distal end 240 of the endoscope 200, thereby improving the cleaning effect. Still alternatively, the first fluid may also be a physiological saline solution such as a surfactant to enhance the cleaning effect on oily dirt.
In some embodiments, as shown in fig. 3B, the second fluid discharge port 173 'of the second fluid supply path may be an opening formed at the distal end of the resilient tab 176', for example at the periphery of the distal seal 150. This second fluid discharge port 173' may be located in the inner wall 112 of the tubular body 110 and outside the cavity of the access component 100 when the assembly is mounted in the inner wall 112 of the tubular body 110. In this case, the second fluid outlet 173' may be used to introduce, for example, CO from a second fluid source2Is vented to the exterior of the access assembly 100 (as shown by arrow C in fig. 3B), for example, into a body cavity of a patient to form an artificial pneumoperitoneum.
In some other embodiments, the second fluid outlet 173' of the second fluid supply path may also be an aperture (not shown) located on the sidewall of the tubular body 110, for example, through the sidewall of the tubular body 110 at a location near the distal end of the tubular body 110. It will be appreciated that the orifice is covered by the resilient tab 176 ' at a corresponding location on the inner wall 112 of the tubular body 110 to be contained within a corresponding extent of the second fluid conduit 175 ' formed by the resilient tab 176 ' being surrounded by a corresponding portion of the inner wall 112. In this case, the second fluid discharge port 173' may also be used to discharge the second fluid to the outside of the access assembly 100 through the sidewall of the tubular body 110.
It will be appreciated that during piercing, the larger diameter piercing tool may press the flexible tabs 176' against the inner wall 112 of the tubular body 110. In the above embodiment (as shown in fig. 3B) using the opening formed at the distal end of the elastic piece 176 'as the second fluid discharge port 173', it is possible to advantageously avoid the second fluid discharge port 173 'from being clogged by the pressed elastic piece 176' during puncturing, so that it is possible to more reliably provide, for example, CO during puncturing2Of the second fluid. In contrast, in embodiments utilizing an aperture on the outer wall of the tubular body 110 as the second fluid discharge port 173 ', the location of the second fluid discharge port 173' may be more flexibly disposed, and not necessarily near the distal end of the access assembly 100.
In some embodiments, the sealing bodies 177, 177 'of the fluid conduits 175, 175' may include a glue groove around the periphery of the elastic sheets 176, 176 'and a sealing glue filled in the glue groove for adhering and sealing the periphery of the elastic sheets 176, 176' to the inner wall 112 of the tubular body 110, thereby forming the fluid conduits 175, 175 'between the inner wall 112 and the elastic sheets 176, 176'. In other embodiments, the sealing bodies 177, 177 'may include ribs of elastomeric material protruding on the periphery of the resilient sheets 176, 176' to nest and seal into correspondingly shaped sealing grooves on the inner wall 112 of the tubular body 110, thereby forming fluid conduits 175, 175 'between the inner wall 112 and the resilient sheets 176, 176'. In some embodiments, the outer circumference of the distal seal 150 may also be circumferentially surrounded with a sealing body to seal the outer circumference of the distal seal 150 to the distal end of the inner wall 112 of the tubular body 110. It is understood that in the embodiment (shown in fig. 3B) using the opening formed at the distal end of the elastic piece 176 ' as the second fluid discharge port 173 ', the sealing body 177 ' is broken at the position of the opening to leave a discharge port through which the second fluid passes. In contrast, in embodiments utilizing an aperture on the outer wall of the tubular body 110 as the second fluid discharge port 173 ', the sealing body 177 ' may completely surround the perimeter of the resilient sheet 176 '.
Fig. 4A is a top view schematically illustrating an access assembly 100 for an endoscope 200 including two fluid supply paths in a contracted state of the fluid lines 175, 175', according to an embodiment of the present application. Fig. 4B is a top view schematically illustrating an access assembly for an endoscope including two fluid supply channels in an inflated state of the fluid conduits 175, 175' according to an embodiment of the present application. Two fluid conduits are shown in fig. 4A and 4B as dashed boxes 175, 175 ', which are respectively formed by the flexible tabs 176, 176' and the corresponding portions of the inner wall 112 of the tubular body 110. An embodiment in which the tubular body 110 is cylindrical is illustrated in the top view of fig. 4A and 4B, wherein the projection of the cylindrical inner wall 112 of the cylindrical tubular body 110 in this top view is a circle, and O denotes the centre of this circle of the projection of the longitudinal axis Z-Z' of the access assembly 100 in this top view. D2 and D2 'represent the maximum diameter of the tool that can be accommodated within the tubular body 110 in the contracted and expanded states of the fluid lines 175, 175', respectively. The angle θ represents the angle that the first and second fluid conduits 175, 175' make in the circumferential direction about the longitudinal axis in this top view.
As shown in fig. 4A, the first and second fluid lines 175, 175 'may be initially in a contracted state when the pressure within the lumen of the access assembly 100 (including the interior of the tubular body 110) is not less than (i.e., greater than or equal to) the pressure within the first and second fluid lines 175, 175'. As an example, this may include the case where the cavity of the access assembly 100, the first fluid line 175, and the second fluid line 175' are all at substantially ambient pressure. Alternatively, in embodiments where the distal seal 150 achieves a one-way seal as described above, this may also involve the lumen of the access assembly 100 being at least partially pressurized by pressure from, for example, an artificial pneumoperitoneum of the patient to a pressure higher than the pressure within the first and second fluid conduits 175, 175'. In this case, the elastic pieces of the first and second fluid lines 175, 175' are in the first state, each bent radially outward toward the inner wall 112 of the tubular body 110, and thus occupy a small space inside the tubular body 110. In the contracted state of the fluid line, a tool having a larger diameter D2 (such as a 12.7mm diameter puncture cone) may be accommodated inside the tubular body 110 with the inside diameter of the tubular body 110 (such as 13.0mm) unchanged.
As shown in fig. 4B, when the pressure within the cavity of the access assembly 100 (including the interior of the tubular body 110) is less than the pressure within the first and second fluid conduits 175, 175 ', the resilient tabs 176, 176 ' of the first and second fluid conduits 175, 175 ' may deform to a second state to become bent radially inward away from the inner wall 112 of the tubular body 110.
In some embodiments, the central angle between the first fluid conduit 175 and the first fluid conduit 175' centered on the central axis of the access assembly may be between 10 ° and 180 °, such as 30 ° and 150 °, such as 45 ° and 135 °, such as 60 ° and 120 °, such as 90 °. It will be appreciated that where the inner diameter of the tubular body 110 and the radial dimensions of the first and second fluid conduits 175, 175 ' are determined, the interior of the tubular body 110 may accommodate devices (such as puncture cones, endoscopes) of larger diameter D2/D2 ' when the angle θ between the first and second fluid conduits 175, 175 ' is smaller, based on simple geometry, in both the collapsed and expanded states. However, a distance between the two fluid lines 175, 175' is also required to provide sufficient width for both and to facilitate connection of the first and second fluid input ports (not shown) to respective fluid sources.
In some embodiments, the inner wall 112 of the tubular body 110 may have a groove 114 thereon, as shown by the dashed box 114 of fig. 4A and 4B. In some embodiments, the groove 114 may extend in the longitudinal axis direction along the inner wall 112 of the tubular body 110 and be configured to receive at least a portion of the respective fluid line 175 of the fluid supply passageway. This portion of the fluid line 175 may be embedded in the groove 114, thereby further reducing the space occupied by the fluid line 175 within the tubular body 110 in the contracted/expanded state to accommodate tools of larger diameter D2/D2'. Although fig. 4A and 4B illustrate only one groove 114 of the mating fluid conduit 175, embodiments according to the present application are not limited thereto. In other embodiments, the inner wall 112 of the tubular body 110 may have grooves thereon that respectively mate with some or all of the plurality of fluid lines.
It will be understood that various modifications may continue with the disclosed method and system. Accordingly, the above description should not be construed as limiting, but merely as exemplifications of aspects of the disclosure. Other modifications will occur to those skilled in the art within the scope and spirit of the disclosure. For example, any and all features of one described aspect may be incorporated into another aspect as appropriate.
Claims (12)
1. An access assembly for receiving an endoscope, the access assembly comprising:
a tubular body configured to extend along a longitudinal axis of the access assembly and for receiving the endoscope;
a proximal seal in sealing connection with the proximal end of the tubular body;
a distal seal in sealing connection with the distal end of the tubular body, wherein an inner wall of the tubular body, a distal surface of the proximal seal, and a proximal surface of the distal seal collectively define a cavity of the access assembly;
a vacuum suction piece configured to be connected with a vacuum suction source and the cavity of the access assembly, respectively; and
one or more fluid supply passages, each of the one or more fluid supply passages comprising a fluid inlet, a fluid outlet, and a fluid conduit fluidly connecting the fluid inlet and the fluid outlet, the fluid conduit being disposed on the inner wall of the tubular body, and the fluid conduit being formed by an elastomeric sheet surrounding at least a portion of the inner wall of the tubular body, and the fluid conduit extending at least partially in the direction of the longitudinal axis.
2. The access assembly for receiving an endoscope according to claim 1, wherein said flexible sheet is configured to have a first state and a second state, wherein,
when the pressure within the cavity of the access assembly is not less than the pressure within the fluid conduit, the resilient tab is in the first state, the resilient tab bending radially outward toward the inner wall of the tubular body in a cross-section perpendicular to the longitudinal axis of the tubular body;
when the pressure within the cavity of the access assembly is lower than the pressure within the fluid conduit, the resilient tab is in the second state, the resilient tab resiliently deforming at least partially to flex radially inward away from the inner wall of the tubular body such that the cross-sectional area of the fluid conduit in a cross-section perpendicular to the longitudinal axis of the tubular body increases.
3. An access assembly for receiving an endoscope according to claim 1 and wherein said one or more fluid supply passageways comprises a first fluid supply passageway including a first fluid input port for receiving a first fluid, a first fluid output port and a first fluid conduit fluidly connecting said first fluid input port and said first fluid output port, said first fluid output port being located within a cavity of said access assembly.
4. An access assembly for receiving an endoscope according to claim 3 and wherein said first fluid discharge port is located on an inner wall of said tubular body or said first fluid discharge port is located on a proximal surface of said distal seal.
5. The access assembly for receiving an endoscope according to claim 3 and wherein said one or more fluid supply passageways further comprises a second fluid supply passageway including a second fluid input port for receiving a second fluid, a second fluid discharge port and a second fluid conduit fluidly connecting said second fluid input port with said second fluid discharge port, said second fluid discharge port being located outside of a cavity of said access assembly.
6. An access assembly for receiving an endoscope according to claim 5 and wherein said second fluid discharge port is an opening at a distal end of said second fluid conduit or an aperture formed in an outer wall of said tubular body.
7. An access assembly for receiving an endoscope according to claim 5 or 6 and wherein two or all three of said flexible sheet of said first fluid conduit, said flexible sheet of said second fluid conduit and said distal seal are integrally formed of a resilient material.
8. An access assembly for receiving an endoscope according to claim 5 or 6 and wherein the central angle of said first and second fluid lines in a cross section perpendicular to the longitudinal axis of said tubular body is between 10 ° and 180 °.
9. An access assembly for receiving an endoscope according to claim 8 and wherein said first and second fluid conduits have a central angle of 90 ° in a cross-section perpendicular to a longitudinal axis of said tubular body.
10. An access assembly for receiving an endoscope according to claim 1 and wherein a seal is provided on said flexible sheet and configured to sealingly connect an edge of said flexible sheet to an inner wall of said tubular body to form said fluid conduit.
11. The access assembly for receiving an endoscope according to claim 10 and wherein said sealing body comprises a glue groove disposed at an edge of said flexible sheet and a sealing glue filled in said glue groove for sealingly adhering an edge of a side of said flexible sheet facing an inner wall of said tubular body to said inner wall of said tubular body to form said fluid conduit.
12. An access assembly for receiving an endoscope according to claim 1 and wherein said tubular body has one or more grooves on an inner wall thereof extending in the direction of said longitudinal axis along the inner wall of said tubular body and each configured to at least partially accommodate a respective fluid conduit of said one or more fluid supply passageways.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123453448.3U CN216823610U (en) | 2021-12-30 | 2021-12-30 | Access assembly for receiving an endoscope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123453448.3U CN216823610U (en) | 2021-12-30 | 2021-12-30 | Access assembly for receiving an endoscope |
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| CN216823610U true CN216823610U (en) | 2022-06-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024055922A1 (en) * | 2022-09-13 | 2024-03-21 | 宁波海泰科迈医疗器械有限公司 | Placement assembly for endoscope and method for using same |
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2021
- 2021-12-30 CN CN202123453448.3U patent/CN216823610U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024055922A1 (en) * | 2022-09-13 | 2024-03-21 | 宁波海泰科迈医疗器械有限公司 | Placement assembly for endoscope and method for using same |
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