CN219323417U - Ureteral sheath front end assembly and ureteral sheath - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, in particular to a ureteral sheath front end assembly and a ureteral sheath, wherein the ureteral sheath front end assembly comprises a flexible pipe body and a support body, the flexible pipe body is provided with an operation channel which is penetrated along the axial direction of the flexible pipe body, the flexible pipe body is sealed in the circumferential direction of the flexible pipe body, the support body is arranged in the pipe wall of the flexible pipe body, and the support body is arranged in an extending way along the axial direction of the flexible pipe body; in the scheme, the hardness of the flexible pipe body can be enhanced by the support body arranged in the pipe wall of the flexible pipe body, so that the flexible pipe body is prevented from deforming and collapsing when being bent, the operation channel of the flexible pipe body is prevented from being blocked, blood clots, fine stones, purulent floccules and the like can be smoothly discharged, and the operation risk of a patient is reduced.

Description

Ureteral sheath front end assembly and ureteral sheath

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a ureteral sheath front end assembly and 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.

In the use process of the ureteral sheath, for example, an endoscope is led into a surgical channel, the front end part of the ureteral sheath can be bent along with the bending of an active bending section of the endoscope, and as the ureteral sheath in the related art is mostly made of a soft rubber material, the front end part of the ureteral sheath can be deformed and collapsed due to overlarge bending amplitude in the bending process, so that the surgical channel is blocked, blood clots, fine stones, purulent floccules and the like are difficult to discharge, the surgical process is seriously influenced, and the surgical risk of a patient is increased.

Disclosure of Invention

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

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

in a first aspect, embodiments of the present application provide a ureteral sheath front end assembly, the ureteral sheath front end assembly comprising:

the flexible tube body is provided with an operation channel which is penetrated along the axial direction of the flexible tube body, and the flexible tube body is sealed in the circumferential direction of the flexible tube body;

the support body is arranged in the pipe wall of the flexible pipe body, and the support body extends along the axial direction of the flexible pipe body.

Further, the flexible pipe body comprises an inner layer and an outer layer, the support body is arranged on the outer side of the inner layer, and the outer layer is coated on the outer side of the support body.

Further, the inner layer is integrally formed with the outer layer to fix the support body.

Further, the outer layer is a heat shrinkage tube, and the outer layer is fixedly connected with the inner layer through thermoplastic.

Further, the supporting body is a woven net pipe or a spiral pipe.

Further, the spiral tube is formed by spirally winding a strip-shaped structure on the outer side of the inner layer, and the width of the strip-shaped structure is smaller than the spiral distance of the spiral tube; alternatively, the spiral tube is formed by spirally winding a thread structure on the outer side of the inner layer, and the diameter of the thread structure is smaller than the spiral interval of the supporting body.

Optionally, the helical pitch of the support bodies is the same.

Optionally, the spiral pitch of the support body gradually increases in a first direction, and the first direction is an extending direction of the support body from the proximal end to the distal end.

Further, the material of the outer layer is at least one of TPE, TPU, PU, PTFE, LDPE, HDPE, PEBAX, PE, EVA, PVC, PET materials; the material of the inner layer is PTFE.

In a second aspect, embodiments of the present application further provide a ureteral sheath, including a base pipe section and the aforementioned ureteral sheath front end assembly, the ureteral sheath front end assembly being connected to the distal end of the base pipe section.

Further, the base pipe section is made of one or more composite materials selected from silica gel, rubber, fluororubber and PEBAX, PTFE, TPU, TPE.

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

firstly, the support body arranged in the flexible tube body can ensure that the flexible tube body can be passively bent along with the treatment instrument, and can enhance the hardness of the flexible tube body, so that the flexible tube body is prevented from deforming and collapsing when being bent, thereby preventing an operation channel of the flexible tube body from being blocked, enabling blood clots, fine stones, purulent floccules and the like to be smoothly discharged, preventing the pressure in the renal pelvis from being increased for too long to cause urologic sepsis, and simultaneously preventing a large amount of broken stones from being accumulated on a ureter after operation to form stone street to cause urinary tract obstruction, and reducing the operation risk of patients;

the inner side and the outer side of the support body of the second and the spiral strip-shaped structures are provided with larger contact areas, so that the coating effect of the outer layer on the inner layer on the support body is better, the axial movement or deformation is not easy to occur, and the connection stability is good; on the other hand, the support body with the spiral band-shaped structure ensures that the flexible pipe body is not easy to bend and collapse, and meanwhile, the space occupation of the spiral band-shaped structure in the radial direction of the ureteral sheath front end assembly is extremely small, so that the development of the diameter reduction of the ureteral sheath front end assembly is facilitated.

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 a schematic structural view of a ureteral sheath front-end assembly according to an embodiment of the present application;

FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of the structure of the support wrapped around the inner layer;

FIG. 4 is a schematic view of the structure of the outer wrap support;

fig. 5 is a cross-sectional view of a ureteral sheath front-end assembly according to an embodiment of the present application;

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

fig. 7 is a schematic structural view of a ureteral sheath according to an embodiment of the present application.

In the figure:

100-flexible pipe body, 110-inner layer, 120-outer layer; 200-supporting body; 300-base pipe section.

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 front end assembly and the ureteral sheath provided in the embodiments of the present application are described in detail below with reference to fig. 1 to 7 by specific embodiments and application scenarios thereof.

The embodiment of the application provides a ureteral sheath front end assembly, which comprises a flexible pipe body 100 and a supporting body 200.

The flexible tube body 100 is a base member of the ureteral sheath front end assembly, and can provide an installation base for the support body 200, specifically, the support body 200 is disposed inside a tube wall of the flexible tube body 100, and the support body 200 extends along an axial direction of the flexible tube body 100.

In this embodiment, referring to fig. 1, a flexible tube body 100 is provided with an operation channel penetrating along an axial direction thereof, after a ureteral sheath is inserted into a patient ureter, the flexible tube body 100 enters a cavity of a renal pelvis, after the endoscope is introduced into the ureteral sheath, the flexible tube body 100 can be bent following the bending of an active bending section of the endoscope, so that blood clots, fine stones, purulent floc and the like in the cavity of the renal pelvis can be discharged through the operation channel, the flexible tube body 100 is sealed in a circumferential direction thereof, tightness of the operation channel can be ensured, and leakage of the blood clots, the fine stones and the purulent floc from a circumferential side of the flexible tube body 100 in an external discharge process can be prevented.

In the above-mentioned scheme, the support 200 disposed in the flexible tube 100 can ensure that the flexible tube 100 can be passively bent along with the treatment device, and can enhance the hardness of the flexible tube 100, so as to avoid the flexible tube 100 from deforming and collapsing during bending, thereby avoiding the blocking of the operation channel of the flexible tube 100, smoothly discharging blood clots, fine stones, purulent floc and the like, avoiding the increase of the pressure in the renal pelvis and the initiation of urologic sepsis caused by the blocking of the operation channel, and simultaneously avoiding the urinary tract obstruction caused by the accumulation of a large number of broken stones on the ureter after operation, thereby reducing the operation risk of patients.

The inventors found in the course of the study that if the supporting body 200 is provided on the inner surface of the tube wall or the inner surface of the tube wall of the flexible tube body 100, the hardness of the flexible tube body 100 can be enhanced. However, the support 200 is provided on the inner surface of the tube wall of the flexible tube 100, which interferes with and wears the introduction of medical instruments such as an endoscope, and also impedes the discharge of blood clots, fine stones, purulent flocs, and the like; the support body 200 is arranged on the outer surface of the tube wall of the flexible tube body 100, so that the support body 200 is easy to scratch the tissues in the human body, and the risk is high. Therefore, in the embodiment of the present application, the supporting body 200 is disposed inside the pipe wall of the flexible pipe body 100, so that not only can the flexible pipe body 100 have proper hardness to avoid deformation and collapse, but also the safety of the flexible pipe body 100 in use of the embodiment can be ensured.

In this embodiment, please refer to fig. 2 to 4, the flexible tube body 100 may include an inner layer 110 and an outer layer 120, the support body 200 is disposed at the outer side of the inner layer 110, the outer layer 120 is coated at the outer side of the support body 200, and the inner layer 110 and the outer layer 120 are used to coat the support body 200 to form a ureteral sheath front end assembly, which has the characteristics of convenient molding and low production cost.

As an alternative embodiment, the inner layer 110, the support 200 and the outer layer 120 may be fixedly connected by means of glue; as another alternative embodiment, the inner layer 110 and the outer layer 120 may be integrally formed to fix the support 200; of course, other connection methods may be used for inner layer 110, support 200, and outer layer 120, which are not limited in this application.

It should be noted that, when the inner layer 110 and the outer layer 120 are integrally formed to form the fixing support, the inner layer 110 and the outer layer 120 may be made of the same material or different materials; for example, the inner layer 110 may be a structural member made of PTFE material, the outer layer 120 may be a heat-shrinkable tube made of PEBAX material, the outer layer 120 may be wrapped around the support 200 by thermoplastic means and perform a fixing function, and the inner layer 110 made of PTFE material has the characteristics of corrosion resistance, high lubrication and non-adhesion, which is beneficial for the drainage of blood clots, fine stones and purulent floc. Of course, the outer layer 120 may be at least one of TPE, TPU, PU, PTFE, LDPE, HDPE, PE, EVA, PVC, PET materials in addition to the PEBAX materials described above, which is not limited in this application.

In an alternative embodiment, the support 200 may be a woven mesh tube, which is sleeved outside the inner layer 110; in another alternative embodiment, the support 200 may be a spiral tube spirally wound outside the inner layer 110; the support body 200 adopts a woven net pipe or a spiral pipe, so that the flexible pipe body 100 can be universally bent, and the flexible pipe body 100 has stronger flexibility of following the active bending section of the endoscope.

Further, the support 200 is preferably a spiral tube, which has the characteristics of simple processing and molding and low production cost compared with the woven mesh tube. In an alternative embodiment, the spiral tube is formed by spirally winding a belt-like structure on the outer side of the inner layer 110; in another alternative embodiment, a spiral tube is formed by spirally winding a wire-like structure around the outside of inner layer 110.

The inventors have found during the course of the study that if the pitch of the spiral pipe is small, the flexible pipe body 100 is stiff, and if the pitch of the spiral pipe is large, the flexible pipe body 100 is soft, that is, the density of the spiral pipe affects the flexibility of the flexible pipe body 100.

Referring to fig. 5 to 6, in the case that the spiral pipe has a spiral band structure, the width a of the band structure is smaller than the spiral pitch b of the spiral pipe, so that the situation that the hardness of the flexible pipe body 100 is too high to be easily bent due to the excessive spiral density of the spiral pipe can be avoided; similarly, in the case of a helical wire structure, the diameter of the wire structure is smaller than the pitch of the helix.

In the implementation of the present application, the support body 200 is preferably in a spiral ribbon structure, on one hand, the inner side and the outer side of the support body 200 in the spiral ribbon structure have larger contact areas, so that the coating effect of the inner layer 110 and the outer layer 120 on the support body 200 is better, the axial movement or deformation is not easy to occur, and the connection stability is good; on the other hand, the space occupation of the support body 200 with the spiral band-shaped structure in the radial direction of the ureteral sheath front end assembly is extremely small, and the development of the diameter reduction of the ureteral sheath front end assembly is facilitated.

It should be noted that, in the embodiment of the present application, the width a and the spiral pitch b of the support body 200 may be adaptively designed according to the actual use requirement of the ureteral sheath front end assembly, and the spiral pitches of the support body 200 in the extending direction may be the same or different, which is not limited in the present application.

As an alternative embodiment, the spiral pitch of the support body 200 is gradually increased in a first direction, which is an extending direction of the support body 200 from the proximal end to the distal end; in this case, the hardness of the distal end of the flexible tube 100 is smaller than that of the proximal end of the flexible tube 100, that is, the distal end of the ureteral sheath front assembly is more susceptible to bending. After the endoscope active bending section is placed in the ureteral sheath front end component, the bending amplitude of the distal end part of the endoscope active bending section is the largest, and in this case, the bending degree and the flexibility of the distal end of the flexible pipe body 100 in the state of being placed in the endoscope can be obviously increased, so that the flexible pipe body has the bending capacity matched with the distal end of the endoscope active bending section.

In the embodiment of the present application, the support 200 is preferably a metal structural member, and may be, for example, one of stainless steel, nickel titanium, aluminum and copper materials.

The embodiment of the application also discloses a ureteral sheath, please refer to fig. 7, wherein the ureteral sheath comprises a base pipe section 300 and the ureteral sheath front end assembly, and the ureteral sheath front end assembly is connected to the distal end of the base pipe section 300.

In the embodiment of the present application, the base pipe section 300 is made of one or more composite materials of silica gel, rubber, fluororubber, PEBAX, PTFE, TPU, TPE, which are not particularly limited in this application.

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 front end assembly, comprising:

a flexible tube body (100), wherein the flexible tube body (100) is provided with a surgical channel which is penetrated along the axial direction of the flexible tube body, and the flexible tube body (100) is sealed at the circumferential direction of the flexible tube body;

the support body (200) is arranged inside the pipe wall of the flexible pipe body (100), and the support body (200) extends along the axial direction of the flexible pipe body (100).

2. The ureteral sheath front end assembly according to claim 1, characterized in that the flexible tube body (100) comprises an inner layer (110) and an outer layer (120), the support body (200) is provided on the outer side of the inner layer (110), and the outer layer (120) is coated on the outer side of the support body (200).

3. The ureteral sheath front assembly according to claim 2, characterized in that the inner layer (110) is integrally formed with the outer layer (120) to fix the support body (200).

4. A ureteral sheath front-end assembly according to claim 3, characterized in that the outer layer (120) is a heat shrink tube, the outer layer (120) being connected and fixed to the inner layer (110) by thermoplastic.

5. The ureteral sheath front-end assembly according to any of claims 2-4, characterized in that the support body (200) is a woven mesh tube or a spiral tube.

6. The ureteral sheath front assembly according to claim 5, characterized in that the spiral tube is formed by a ribbon-like structure helically wound on the outside of the inner layer (110), the width of the ribbon-like structure being smaller than the helical pitch of the spiral tube;

alternatively, the spiral tube is formed by spirally winding a filiform structure on the outer side of the inner layer (110), and the diameter of the filiform structure is smaller than the spiral distance of the spiral tube.

7. The ureteral sheath front end assembly according to claim 5, characterized in that the helical pitch of the support (200) is the same; alternatively, the spiral pitch of the support body (200) gradually increases in a first direction, the first direction being an extending direction of the support body (200) from the proximal end to the distal end.

8. The ureteral sheath front assembly according to claim 4, characterized in that the outer layer (120) is a structural member made of one of the TPE, TPU, PU, PTFE, LDPE, HDPE, PEBAX, PE, EVA, PVC, PET materials; and/or the inner layer (110) is a structural member made of PTFE material.

9. A ureteral sheath, characterized by comprising a base pipe section (300) and the ureteral sheath front-end assembly according to any of claims 1-8, wherein the ureteral sheath front-end assembly is connected to the distal end of the base pipe section (300).

10. The ureteral sheath according to claim 9, characterized in that the base tube section (300) is a structural member made of one of the materials silicone, rubber, fluororubber, PEBAX, PTFE, TPU, TPE.

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