CN219021309U - Ureteral sheath - Google Patents

Abstract

The utility model relates to the technical field of medical instruments, in particular to a ureteral sheath, which comprises a sheath body, a sheath seat, an inner sheath component and a sealing component, wherein the sheath body is provided with a first channel which is penetrated along the axial direction of the sheath body, the sheath seat is connected to the proximal end of the sheath body, and the sheath seat is configured to be selectively connected with one of the inner sheath component and the sealing component; in the scheme, the inner sheath component and the sealing component are respectively detachably connected with the tube sheath seat, after the tube sheath body is assisted by the inner sheath component to enter a human body, the inner sheath component is pulled out, and then the sealing component is connected with the tube sheath seat, so that the influence of the inner sheath on the sealing performance of the sealing component can be avoided.

Description

Ureteral sheath

Technical Field

The utility model relates to the technical field of endoscopes, in particular to a ureteral sheath.

Background

Ureteral sheaths are used in urology surgery, and a ureteral sheath must be placed in the ureter before the operation of the urology surgery in order to establish a surgical channel, and an endoscope, a laser fiber, a stone removing instrument, an operation cable or the like is introduced through the surgical channel during the operation, and some blood clots, fine stones and purulent floccules are also discharged from the ureteral sheath.

The ureteral sheath in the related art is usually required to be used for assisting in entering the human body, and because the inner sheath needs to be inserted or pulled out, the inner sheath often interferes with the sealing valve, and the radial dimension of the inner sheath is far greater than that of the endoscope, so that the sealing effect of the sealing valve is poor after the ureteral sheath is inserted into the endoscope.

Disclosure of Invention

In view of the above, it is necessary to provide a ureteral sheath.

In order to solve the problems, the utility model adopts the following technical scheme:

the embodiment of the application provides a ureteral sheath, which comprises a sheath body, a sheath seat, an inner sheath component and a sealing component; wherein:

the sheath body is provided with a first channel therethrough along an axial direction thereof, the sheath hub is connected to a proximal end of the sheath body, and the sheath hub is configured to selectively connect one of the inner sheath assembly and the seal assembly.

Further, the seal assembly includes an end cap and a seal member disposed at a proximal end of the hosel seat to close the first passageway, the end cap being detachably connected to the hosel seat to secure the seal member.

Further, the sealing element comprises an extension part and a fixing part surrounding the extension part, the fixing part is arranged on the proximal end face of the sheath seat to be abutted against the end cover, the extension part extends along the distal end of the sheath seat and is closed, and a cutting seam is arranged at the closed end of the extension part.

Further, the sealing element further comprises a positioning part connected with the fixing part, a positioning groove is formed in the proximal end face of the tube sheath seat, and the positioning part is arranged in the positioning groove.

Further, in a first direction, the inner side groove wall of the positioning groove protrudes out of the outer side groove wall of the positioning groove, and the first direction is the extending direction of the sheath seat from the proximal end to the distal end.

Further, the sheath seat is provided with a sliding groove extending along the circumferential direction of the sheath seat, one end of the sliding groove is provided with an inserting port communicated with the sliding groove, the end cover is provided with a clamping part, and the clamping part is inserted into the sliding groove through the inserting port so that the clamping part is in sliding fit with the sheath seat in the sliding groove.

Further, the sheath seat is also provided with a negative pressure nozzle, and the negative pressure nozzle is communicated with the first channel.

Further, the inner sheath assembly comprises an inner sheath body and an inner sheath seat connected with the inner sheath body, and the inner sheath seat is detachably connected with the tube sheath seat.

Further, the inner sheath seat is provided with elastic hangers arranged in pairs, and the inner sheath seat is clamped with the outer edge of the tube sheath seat through the elastic hangers.

Further, the outer fringe of sheath seat is provided with spacing portion under the elasticity hangers joint in the circumference direction of sheath seat, elasticity hangers with spacing portion spacing cooperation.

The technical scheme adopted by the utility model can achieve the following beneficial effects:

the first inner sheath component and the sealing component are respectively detachably connected with the tube sheath seat, the tube sheath seat is selectively connected with one of the inner sheath component and the sealing component, after the tube sheath body is assisted to enter a human body by using the inner sheath component, the inner sheath component and the tube sheath seat can be detached and pulled away, and then the sealing component is connected with the tube sheath seat so as to seal the first channel, so that the influence on the sealing performance of the sealing component caused by overlarge radial size of the inner sheath can be avoided;

the second end cover is connected with the tube sheath seat in a rotary clamping manner, so that the tube sheath seat has the characteristics of convenience in operation, time saving and labor saving;

and the extension part of the sealing element extends inwards and is closed, so that on one hand, a guiding effect can be provided for the insertion of the treatment instrument, the convenience of the insertion of the treatment instrument is improved, and on the other hand, a small amount of body fluid possibly leaking out during the insertion of the treatment instrument is attached to the cavity wall at the far end of the guiding cavity and cannot leak out, and the pollution can be effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is one of the ureteral sheaths of embodiments of the present application;

FIG. 2 is a diagram of a second ureteral sheath according to an embodiment of the present application;

FIG. 3 is a schematic view of a sheath hub according to an embodiment of the present application;

FIG. 4 is a second schematic view of a sheath hub according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural view of an inner sheath assembly according to an embodiment of the present application;

FIG. 6 is an enlarged partial schematic view at A in FIG. 5;

FIG. 7 is a schematic illustration of the connection of an inner sheath assembly to a sheath hub in accordance with an embodiment of the present application;

FIG. 8 is a schematic structural view of an end cap of an embodiment of the present application;

FIG. 9 is one of the structural schematic diagrams of the seal of the embodiments of the present application;

FIG. 10 is a second schematic structural view of a seal according to an embodiment of the present application;

FIG. 11 is a cross-sectional view of a seal of an embodiment of the present application;

fig. 12 is a schematic structural view of a seal assembly according to an embodiment of the present application.

In the figure:

100-sheath body, 110-primary channel; 200-of a tube sheath seat, 210-of a tube sheath seat tube section, 220-of a tube sheath seat base body, 221-of a positioning groove, 222-of an inner groove wall, 223-of an outer groove wall, 224-of a sliding groove, 225-of an inserting port and 230-of a negative pressure nozzle; 300-inner sheath components, 310-inner sheath bodies, 320-inner sheath seats and 321-elastic hangers; 400-seal assembly, 410-end cap, 411-snap, 420-seal, 421-extension, 422-fixation, 423-slit, 424-positioning, 425-guide lumen.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the utility model, the 'near end' and the 'far end' are far and near positions of the structure relative to human body operation under the use environment, so that the description of the position relationship among the components is convenient, and meanwhile, the understanding is convenient; the "proximal" and "distal" are relative positional relationships, not absolute.

The ureteral sheath provided in the embodiments of the present application will be described in detail below with reference to fig. 1 to 12 by way of specific embodiments and application scenarios thereof.

Referring to fig. 1-2, an embodiment of the present application discloses a ureteral sheath, which includes a sheath body 100, a sheath seat 200, an inner sheath assembly 300, and a sealing assembly 400.

The sheath body 100 is provided with a first channel penetrating along an axial direction thereof, the sheath seat 200 is provided with a second channel penetrating along an axial direction thereof, the sheath seat 200 is connected to a proximal end of the sheath body 100, the first channel is communicated with the second channel to form a surgical channel, and a treatment instrument such as an endoscope, a laser fiber, a stone removing instrument or an operation cable can extend into the renal pelvis through the surgical channel, and of course, the surgical channel can be communicated with a negative pressure mechanism, and blood clots, fine stones and purulent floc can be discharged from the surgical channel under the suction effect of the negative pressure mechanism.

The inner sheath assembly 300 and the sealing assembly 400 are detachably connected with the hosel seat 200, respectively, and the hosel seat 200 selectively connects one of the inner sheath assembly 300 and the sealing assembly 400, that is, the ureteral sheath of the present embodiment has a first state and a second state: as shown in fig. 1, in the case that the ureteral sheath is in the first state, the hosel socket 200 is connected to the inner sheath assembly 300, and at this time, a portion of the inner sheath assembly 300 may penetrate into the surgical channel, assisting in inserting the hosel body 100 into the human body; with the ureteral sheath in the second state, as shown in fig. 2, the hosel seat 200 is coupled to the seal assembly 400, at which point the seal assembly 400 seals the surgical passage at the proximal end of the surgical passage.

Based on the above-mentioned scheme, the ureteral sheath that this application embodiment disclosed, interior sheath subassembly 300 and seal assembly 400 can dismantle with the pipe sheath seat 200 respectively and be connected, after using interior sheath subassembly 300 to assist the pipe sheath body 100 to get into in the human body, can dismantle interior sheath subassembly 300 and pipe sheath seat 200 and take out, be connected seal assembly 400 and pipe sheath seat 200 again to carry out isolated seal to first passageway and external environment, can avoid from this that interior sheath interlude sealing member leads to the condition that sealing member sealing performance is poor in traditional ureteral sheath.

In the present embodiment, the hosel socket 200 includes a hosel socket segment 210 and a hosel socket base 220 joining the hosel socket segment 210, wherein the hosel socket segment 210 is configured to interface with the hosel body 100 and the hosel base 220 is configured to provide a mounting basis for the inner sheath assembly 300 and the seal assembly 400.

Specifically, in the embodiment of the present application, the inner sheath assembly 300 includes an inner sheath body 310 and an inner sheath seat 320 connected to the inner sheath body 310, and the inner sheath body 310 is a structural member made of a hard material as compared to the lumen sheath body 100, and the inner sheath body 310 is used to extend into the first channel and enhance the rigidity of the insertion portion of the ureteral sheath, thereby serving to assist the insertion of the lumen sheath body 100 into the human body.

The inner sheath holder 320 is detachably connected with the sheath holder base 220, and after the inner sheath assembly 300 assists the sheath body 100 to be inserted into a human body, the auxiliary function of the inner sheath assembly 300 is used, the connection state of the inner sheath holder 320 and the sheath holder base 220 can be released, and the inner sheath body 310 can be pulled out from the sheath body 100.

In an alternative embodiment, the inner sheath holder 320 has elastic lugs 321 disposed in pairs, and the inner sheath holder 320 is engaged with the outer edge of the sheath holder base 220 through the elastic lugs 321.

Specifically, the proximal ends of the elastic hangers 321 are operation ends, the distal ends of the elastic hangers 321 are clamping ends, and when the inner sheath seat 320 is connected with the sheath seat base 220, the operation ends of the two elastic hangers 321 arranged in pairs are pressed, so that the jaws formed by the distal ends of the two elastic hangers 321 are enlarged, and the outer edges of the sheath seat base 220 are clamped in to realize connection; when the detachable connection between the inner sheath seat 320 and the sheath seat base 220 is realized, the operation ends of the two elastic hangers 321 arranged in pairs are pressed equally during detachment, so that the jaws are enlarged again, the outer edge of the sheath seat base 220 loses the limit function on the elastic hangers 321, and the inner sheath assembly 300 is pulled away.

Based on the above scheme, the elastic lugs 321 are adopted to clamp the inner sheath seat 320 with the tube sheath seat base 220, the inner sheath body 310 can be taken out by inwards pinching the proximal ends of the two elastic lugs 321, the whole process is convenient and fast to operate, the force application of operators is facilitated, and the operation is smooth.

In this embodiment, please refer to fig. 3-7, the outer edge of the sheath seat base 220 is provided with a limiting portion 240, and under the condition that the elastic suspension lugs 321 are clamped on the sheath seat base 220, the elastic suspension lugs 321 are in limiting fit with the limiting portion 240 in the circumferential direction of the sheath seat base 220, so that under the condition that the inner sheath body 310 is inserted into a human body, the limiting portion 240 can prevent the inner sheath assembly 300 from rotating, thereby avoiding tissue trauma to a patient caused by rotation of the inner sheath body 310 and reducing pain of the patient.

In an alternative embodiment, the limiting portion 240 may be a ring buckle disposed at the outer edge of the sheath seat base 220, and the distal end of the elastic hanging ring 321 is located in the ring buckle, and the closed limiting structure of the ring buckle is adopted, so that the situation that the limiting portion 240 protrudes from the outer edge of the sheath seat base 220 to scratch can be avoided, and the use safety of the sheath seat base 220 is improved.

In this embodiment, the seal assembly 400 includes an end cap 410 and a seal member 420, where the seal member 420 is disposed at the proximal end of the sheath holder 200 to close the surgical channel, i.e. to close the aforementioned first channel, and the end cap 410 is detachably connected to the sheath holder base 220, so as to fix the seal member 420 and prevent the seal member 420 from being separated.

In an alternative embodiment, the end cover 410 is rotatably clamped with the sheath seat base 220, specifically, referring to fig. 3, 4, 8 and 11, the sheath seat base 220 is provided with a sliding groove 224 extending along a circumferential direction thereof, one end of the sliding groove 224 is provided with an inserting opening 225 with the sliding groove 224, the end cover 410 is provided with a clamping portion 411, and the clamping portion 411 is inserted into the sliding groove 224 through the inserting opening 225, so that the clamping portion 411 is slidably matched with the sheath seat 200 in the sliding groove 224.

In this embodiment, the clamping portion 411 has an anti-falling section, the cross-sectional dimension of the anti-falling section perpendicular to the axial direction of the sheath seat base 220 is smaller than the opening dimension of the plug-in port 225, so that the anti-falling section can pass through the plug-in port 225, the width of the anti-falling section is larger than the width of the sliding groove 224, and when the clamping portion 411 is slidably matched in the sliding groove 224, the anti-falling section can be in limit fit with the distal end face of the sheath seat base 220, thereby preventing the end cover 410 from being separated.

Based on the above-mentioned scheme, the seal assembly 400 disclosed in the embodiment of the present application has the characteristics of convenient disassembly and assembly with the sheath seat base 200, and only the end cover 410 needs to be rotated to realize connection or disassembly of the end cover 410 and the sheath seat base 220, and the rotation direction during the installation of the end cover 410 is opposite to the rotation direction during the disassembly of the end cover 410, so that the operation is convenient and easy, and the labor is saved and smooth.

Of course, the end cover 410 may be connected to the sheath seat base 220 by a threaded connection, a snap connection, or the like, in addition to the detachable connection with the sheath seat base 220 by the above-mentioned rotary fastening method, and the embodiment of the present application is not limited to a specific connection method of the two.

In the embodiment of the present application, the sealing member 420 includes an extension portion 421 and a fixing portion 422 surrounding the extension portion 421, wherein the fixing portion 422 is disposed on a proximal end surface of the sheath base body 220, and when the sheath base body 220 is connected with the end cap 410, the end cap 410 abuts against the fixing portion 422 with the proximal end surface of the sheath base body 220, so as to fix the sealing member 420; the extension 421 extends into the second channel and toward the distal end of the sheath hub 200, the extension 421 being provided with a guide lumen 425, the distal end of the seal 420 being closed to isolate the second channel from the guide lumen 425.

The distal end of the sealing member 420 is provided with a slit 423, when a treatment instrument such as an endoscope, a laser fiber and the like is inserted, the treatment instrument passes through the slit 423 and stretches into the operation channel so as to stretch into a focus position in a human body, and the guiding cavity 425 of the extension part 421 can provide guiding function for the insertion of the treatment instrument and improve the convenience of the insertion of the treatment instrument; meanwhile, even if a small amount of body fluid leaks out through the slit 423 during insertion of the treatment instrument, the small amount of body fluid adheres to the distal cavity wall of the guide cavity 425 without being exposed, and contamination can be effectively reduced.

The sealing member 420 further comprises a positioning part 424 connected with the fixing part 422, a positioning groove 221 is formed in the proximal end face of the sheath seat 200, and the positioning part 424 is arranged in the positioning groove 221; on the one hand, based on the limiting action of the positioning groove 221, the sealing element 420 can be prevented from moving in the radial direction, the convenience and stability of the assembly of the sealing element 420 are improved, on the other hand, in the process of inserting a treatment instrument, the sealing element 420 is pushed inwards by the treatment instrument, the positioning part 424 and the positioning groove 221 are matched, the sealing element 420 can be further prevented from moving and deforming in the second channel, and the use stability of the sealing element 420 is improved.

In a further aspect, in the first direction, the inner groove wall 222 of the positioning groove 221 protrudes from the outer groove wall 223 of the positioning groove 221, and the first direction is an extending direction of the sheath seat 200 from the proximal end to the distal end; in this way, the resistance to movement deformation of the seal 420 into the second passage can be increased, and the stability in use of the seal 420 can be further improved.

Referring to fig. 8, the end cap 410 is provided with a positioning ring 412, the clamping portion 411 is disposed on an end surface of the positioning ring 412, the clamping portion 411 is bent outwards to form the anti-drop section, the clamping portion 411 has a guiding cambered surface at the bent portion, and when the end cap 410 is abutted to the sheath seat base 220, the guiding cambered surface is in guiding fit with the outer groove wall 223, so that the outer groove wall 223 is smoothly clamped into the positioning ring 412, the outer groove wall 223 is in limiting fit with the positioning ring 412 in a radial direction of the sheath seat base 220, so that the convenience of assembling the end cap 410 is improved, and meanwhile, the end cap 410 can be prevented from moving in the radial direction.

It will be appreciated that the end cap 410 is provided with a relief hole corresponding to the guide cavity 425, which provides relief for insertion of the treatment instrument.

As can be seen from the foregoing, the operation channel of the ureteral sheath may be connected to a negative pressure mechanism for extracting the fluid in the human body, in an alternative embodiment, referring to fig. 3 and 4, the sheath holder 200 further includes a negative pressure nozzle 230, and the negative pressure nozzle 230 is connected to the sheath holder tube section 210 and is connected to the second channel, where the negative pressure nozzle 230 is connected to the negative pressure mechanism, the fluid in the human body may be extracted through the negative pressure nozzle 230; of course, the negative pressure nozzle 230 may also be connected to the proximal end of the sheath body 100, as long as the suction of the effusion in the human body can be achieved, and the embodiment of the present application is not limited.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model.

Claims (10)

1. A ureteral sheath, comprising: a sheath body (100), a sheath hub (200), an inner sheath assembly (300) and a seal assembly (400); wherein:

the sheath body (100) is provided with a first channel therethrough in an axial direction, the sheath hub (200) is connected to a proximal end of the sheath body (100), and the sheath hub (200) is configured to selectively connect one of the inner sheath assembly (300) and the seal assembly (400).

2. The ureteral sheath according to claim 1, characterized in that the sealing assembly (400) comprises an end cap (410) and a seal (420), the seal (420) being provided at the proximal end of the sheath hub (200) to close the first channel, the end cap (410) being detachably connected with the sheath hub (200) to fix the seal (420).

3. The ureteral sheath according to claim 2, characterized in that the seal (420) comprises an extension (421) and a fixation (422) surrounding the extension (421), the fixation (422) being provided at the proximal end face of the sheath hub (200) to abut against the end cap (410), the extension (421) extending along the distal end of the sheath hub (200) and being closed, the closed end of the extension (421) being provided with a slit (423).

4. A ureteral sheath according to claim 3, characterized in that the sealing element (420) further comprises a positioning portion (424) connected to the fixing portion (422), the proximal end face of the sheath holder (200) being provided with a positioning groove (221), the positioning portion (424) being provided in the positioning groove (221).

5. The ureteral sheath according to claim 4, characterized in that an inner groove wall (222) of the positioning groove (221) protrudes from an outer groove wall (223) of the positioning groove (221) in a first direction, which is the extension of the sheath holder (200) from the proximal end to the distal end.

6. The ureteral sheath according to any of claims 2-5, characterized in that the sheath holder (200) is provided with a chute (224) extending along the circumference thereof, one end of the chute (224) is provided with a plug-in port (225) communicating with the chute (224), the end cap (410) is provided with a clamping portion (411), and the clamping portion (411) is inserted into the chute (224) through the plug-in port (225), so that the clamping portion (411) is slidably fitted in the sheath holder (200) in the chute (224).

7. The ureteral sheath according to claim 1, characterized in that the sheath mount (200) is further provided with a negative pressure nozzle (230), the negative pressure nozzle (230) being in communication with the first channel.

8. The ureteral sheath according to any of claims 2-5, characterized in that the inner sheath assembly (300) comprises an inner sheath body (310) and an inner sheath hub (320) connected to the inner sheath body (310), the inner sheath hub (320) being detachably connected to the lumen sheath hub (200).

9. The ureteral sheath according to claim 8, characterized in that the inner sheath mount (320) has elastic lugs (321) arranged in pairs, the inner sheath mount (320) being clamped with the outer rim of the tube sheath mount (200) by the elastic lugs (321).

10. The ureteral sheath according to claim 9, characterized in that the outer edge of the sheath seat (200) is provided with a limiting part (240), and in the circumferential direction of the sheath seat (200) in the case that the elastic lugs (321) are clamped to the sheath seat (200), the elastic lugs (321) are in limiting fit with the limiting part (240).

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