CN212307910U

CN212307910U - Guide sheath

Info

Publication number: CN212307910U
Application number: CN202020862361.8U
Authority: CN
Inventors: 孙加源; 陈军祥; 谢芳芳; 袁海宾; 张琴; 潘玉均
Original assignee: Shanghai Chest Hospital
Current assignee: Shanghai Chest Hospital
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2021-01-08
Anticipated expiration: 2030-05-21

Abstract

The utility model provides a guide sheath tube, which comprises a first sheath tube, a second sheath tube and a guide sleeve, wherein the first sheath tube is in a hollow tubular shape and is made of flexible materials; the second sheath tube is in a hollow tubular shape, is connected with the first sheath tube and is made of rigid material; and the locking structure is partially or completely arranged on the outer side of the second sheath and is used for locking the position of the second sheath in the bronchus of the human body. Among the guide sheath pipe, first sheath pipe is flexible material, can make the guide sheath pipe reachs the target tissue position easily, and the second sheath pipe is rigid material, can play the supporting role to avoid organizing the sample to drop, improved the sample taking efficiency who organizes the sample.

Description

Guide sheath

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a guide sheath pipe.

Background

For tumors (e.g. bronchial carcinomas) or inflamed interstitial lung diseases in the surrounding lung tissue, a tissue sample is taken from the surrounding lung tissue from which the disease of the patient is diagnosed. However, in the existing sampling device, the probe and the sheath are made of soft materials, and the soft materials can easily control the probe to reach the tissue to be treated or sampled.

Chinese patent publication No. CN103284775A discloses an intracranial thrombus extraction device, which comprises a thrombus extraction system, a delivery and release system, a handle system, and a guiding sheath tube made of a polymer material, polytetrafluoroethylene. Therefore, the whole guiding sheath is made of one material, and if biopsy sampling is performed through the guiding sheath of the type, because the sheath is soft, a tissue sample is easy to fall off easily in the pulling-out process, so that the sampling efficiency is not high, and even the sampling fails.

Therefore, there is a need to provide a new guiding sheath to solve the above problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a guide sheath pipe improves the sample efficiency of organizing the sample.

In order to achieve the above object, the guiding sheath of the present invention comprises:

the first sheath tube is in a hollow tubular shape and is made of flexible materials;

the second sheath tube is in a hollow tubular shape, is connected with the first sheath tube and is made of rigid material;

and the locking structure is partially or completely arranged on the outer side of the second sheath and is used for locking the position of the second sheath in the bronchus of the human body.

The beneficial effects of the utility model reside in that: first sheath pipe is flexible material, can make the guide sheath pipe reachs the target tissue position easily, and the second sheath pipe is rigid material, can play the supporting role to avoid organizing the sample to drop, improved the sampling efficiency who organizes the sample.

Preferably, the first sheath and the second sheath are bonded or fused to each other.

Preferably, the second sheath includes:

a metal tube in a hollow tubular shape;

the joint part is in a hollow tubular shape, the outer wall of the joint part is attached to the inner wall of the metal pipe, and the joint part is connected with the first sheath pipe. The beneficial effects are that: facilitating connection of the first sheath with the second sheath.

Further preferably, the second sheath is a hard polymer material, and the second sheath is kept away from the outside of one end of the first sheath is provided with a developing ring, and the distance the second sheath is kept away from the distance at the port of the one end of the first sheath is 2-5 mm. The beneficial effects are that: the auxiliary imaging equipment is convenient to determine the position of the metal tube in the human body.

Further preferably, the length of the second sheath is 5-10 mm. The beneficial effects are that: the sheath tube can play a supporting role, and the situation that the guiding sheath tube cannot easily reach the target tissue position due to the fact that the length is too long can be avoided.

Further preferably, the length of the joint part in the metal pipe is 2-7 mm. The beneficial effects are that: the metal pipe is prevented from falling off from the joint portion.

Further preferably, one end of the second sheath tube is of a crevasse structure, and the crevasse structure forms a horn mouth structure after being unfolded. The beneficial effects are that: the resistance of the tissue sample entering the second sheath is reduced, and the falling of the tissue sample caused by overlarge resistance is avoided.

Further preferably, the crevasse structure comprises crevasses, and the number of the crevasses is 2-16.

Further preferably, the maximum inner diameter of the bell mouth structure is 0.05mm-1.5mm larger than the minimum inner diameter. The beneficial effects are that: the damage to a human body caused by the overlarge maximum inner diameter of the bell mouth structure is avoided.

Further preferably, the guide sheath still includes the outer tube, the outer tube cup joints the outside of second sheath, the outer tube is kept away from one side of breach structure is equipped with control structure, control structure is used for controlling the outer tube is in the second sheath slides in the outside, in order to control the breach structure struts or contracts. The beneficial effects are that: and assisting the crevasse structure to realize the contraction and the expansion of the crevasse structure.

Further preferably, the material of the crevasse structure is a memory alloy.

Preferably, the guiding sheath further comprises a gas transmission pipeline, and the gas transmission pipeline is arranged on the inner side or the outer side of the first sheath and the second sheath.

Further preferably, the locking structure comprises an air bag, at least one inflation port is arranged on the air bag, and the inflation port is communicated with the gas transmission pipeline. The beneficial effects are that: the air sac can play a role in fixing and fixing cancellation, and can press the blood vessel to play a role in stopping bleeding when bleeding occurs in the bronchus.

Further preferably, the balloon is 5-10mm in length when not inflated. The beneficial effects are that: can play the fixed effect, and avoid the too big damage to human bronchus that causes of volume.

Preferably, the outer sides of the first sheath tube and the second sheath tube are provided with continuous scale marks distributed along the length direction. The beneficial effects are that: the length of the first sheath and the second sheath extending into the bronchus of the human body is convenient to determine.

Drawings

Fig. 1 is a schematic structural view of a guiding sheath according to the present invention;

fig. 2 is a schematic structural view of a guiding sheath according to still another embodiment of the present invention;

fig. 3 is a schematic structural view of a second sheath according to the present invention;

fig. 4 is a schematic view of the guiding sheath when the laceration structure is not spread in some embodiments of the present invention;

fig. 5 is a schematic view of the guiding sheath after the opening structure is spread according to some embodiments of the present invention;

FIG. 6 is a schematic structural view of an uninflated balloon on a second sheath according to the present invention;

fig. 7 is a schematic structural view of an inflated balloon on a second sheath according to the present invention;

fig. 8 is a flowchart of a method for using the guiding sheath according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

To solve the problems in the prior art, an embodiment of the present invention provides a guiding sheath, referring to fig. 1, the guiding sheath 10 includes:

the first sheath 11 is in a hollow tubular shape and made of a flexible material;

a second sheath 12 having a hollow tubular shape, connected to the first sheath 11, and made of a rigid material;

and a locking structure 13, partially disposed outside the second sheath 12, for locking the position of the second sheath 12 in the bronchus of the human body.

Fig. 2 is a schematic structural view of a guiding sheath according to still another embodiment of the present invention. Referring to fig. 2, the guide sheath 10 includes:

and the locking structure 13 is arranged outside the second sheath 12 and used for locking the position of the second sheath 12 in the bronchus of the human body.

The rigid material of the utility model is elastic modulus more than or equal to 6.11N/mm²The elastic modulus of the flexible material of the utility model is less than 6.11N/mm²The material of (1).

In some embodiments of the present invention, the material of the first sheath and the second sheath is medical plastic.

In some preferred embodiments of the present invention, referring to fig. 1, the outer sides of the first sheath and the second sheath are provided with continuous scale marks distributed along the length direction.

In some embodiments of the present invention, the first sheath and the second sheath are connected by adhesion or fusion.

Fig. 3 is a schematic structural diagram of a second sheath according to some embodiments of the present invention. Referring to fig. 3, the second sheath 12 includes:

a metal tube 121 having a hollow tubular shape;

the joint portion 122 is in a hollow tubular shape, and an outer wall of the joint portion is attached to an inner wall of the metal tube 122 and connected to the first sheath tube (not shown).

In some preferred embodiments of the present invention, referring to fig. 1, fig. 2 and fig. 3, the second sheath 12 is made of a hard polymer material, and the second sheath 12 is away from the outside of one end of the first sheath 11 is provided with the developing ring 123, and is a distance away from the second sheath 12 is away from a port of the first sheath 11 is 2-5mm, which is convenient for the auxiliary image device to determine the position of the second sheath 12 in the human body.

In some embodiments of the present invention, the second sheath tube has a length of 5-10 mm. Preferably, the length of the joint part positioned in the metal pipe is 2-7 mm.

In some preferred embodiments of the present invention, the second sheath tube has a length of 5mm, and the joint portion has a length of 2mm in the metal tube.

In some preferred embodiments of the present invention, the second sheath tube has a length of 7mm, and the joint portion has a length of 4mm inside the metal tube.

In some preferred embodiments of the present invention, the second sheath tube has a length of 9mm, and the joint portion is located in the metal tube and has a length of 6 mm.

In some preferred embodiments of the present invention, the second sheath tube has a length of 10mm, and the joint portion has a length of 7mm in the metal tube.

Fig. 4 is a schematic view of the guiding sheath when the crevasse structure is not expanded according to some embodiments of the present invention. Referring to fig. 3, one end of the second sheath 12 is in a crevasse structure 125, the crevasse structure 125 includes crevasses 126, the number of the crevasses 126 is 2-16, and the crevasses are slits. The guiding sheath further comprises an outer sleeve 124, the outer sleeve 124 being attached to the outside of the second sheath 12, and the second sheath 12 being slidable within the outer sleeve 124.

In some embodiments of the present invention, the number of lacerations is one of 2, 5, 9, 12 and 16.

Fig. 5 is a schematic view of the guiding sheath after the opening structure is opened according to some embodiments of the present invention. Referring to fig. 5, the material of the breach structure 125 is a memory alloy, specifically a nickel-titanium memory material, and when the breach structure extends out of the outer tube 124, the breach structure 125 is spread to form a bell-mouth structure, and the minimum inner diameter of the bell-mouth structure is equal to the inner diameter of the middle section of the second sheath 12. Preferably, the maximum inner diameter of the bell-mouth structure, i.e., the inner diameter of the open end, is 0.05-1.5mm larger than the minimum inner diameter, i.e., the end connected to the second sheath tube 12.

Referring to fig. 3 and 5, a control structure 127 is disposed on a side of the outer sleeve 124 away from the breach structure, and the control structure 127 is configured to control the outer sleeve 124 to slide outside the second sheath 12, so as to control the breach structure 125 to expand or contract. The control structure 127 includes a first pushing portion 1271, a second pushing portion 1272 and a spring 1273, wherein the first pushing portion 1271 and the second pushing portion 1272 are connected by the spring 1273, the first pushing portion 1271 is fixed on the outer side of the outer casing 124, and the second pushing portion 1272 is fixedly connected with the first sheath tube 11 by a connecting rod 1274. Preferably, the first and second pushing

portions

1271 and 1272 are ring-shaped.

In some preferred embodiments of the present invention, the maximum inner diameter of the bell mouth structure is 0.05mm larger than the minimum inner diameter.

In some preferred embodiments of the present invention, the maximum inner diameter of the bell mouth structure is 0.25mm larger than the minimum inner diameter.

In some preferred embodiments of the present invention, the maximum inner diameter of the bell mouth structure is 0.5mm larger than the minimum inner diameter.

In some preferred embodiments of the present invention, the maximum inner diameter of the bell mouth structure is 0.75mm larger than the minimum inner diameter.

In some preferred embodiments of the present invention, the maximum inner diameter of the bell mouth structure is 1mm larger than the minimum inner diameter.

In some preferred embodiments of the present invention, the maximum inner diameter of the bell mouth structure is 1.25mm larger than the minimum inner diameter.

In some preferred embodiments of the present invention, the maximum inner diameter of the bell mouth structure is 1.5mm larger than the minimum inner diameter.

In some preferred embodiments of the present invention, the maximum inner diameter of the bell-mouth structure is 3-4mm, the maximum inner diameter of the first sheath tube and the second sheath tube is 2.3mm, and the maximum outer diameter of the first sheath tube and the second sheath tube is 2.95 mm.

In some embodiments of the present invention, the first sheath comprises a handheld end, the handheld end is provided with an operating rod, the operating rod is used for right the opening structure plays a stretching role, so that the opening structure faces the outside of the second sheath, thereby being too large the opening size of one end of the second sheath is convenient for organizing the sample to enter the second sheath.

Fig. 6 is a schematic structural view of an inflatable balloon on the second sheath according to some embodiments of the present invention. Referring to fig. 6, the locking structure (not shown) includes a balloon 131, and the balloon 131 is provided with at least one inflation port 132, and the inflation port (not shown) is connected to the gas transmission pipeline (not shown), wherein the gas transmission pipeline is disposed inside or outside the first sheath (not shown) and the second sheath 12. Specifically, the balloon 131 has a length of 5-10mm when it is not inflated, and is attached to the outer wall of the second sheath 12. The balloon 131 can play a role in fixing and fixing removal, and when a bronchus bleeds, the balloon 131 can press a blood vessel to play a role in stopping bleeding.

In some preferred embodiments of the present invention, when the gas transmission pipeline is disposed inside the first sheath tube and the second sheath tube, the inflation port is disposed on the wall of the air bag and the second sheath tube, and passes through the second sheath tube. More preferably, a protective layer is arranged on the outer side of the gas transmission pipeline, covers the outer side of the gas transmission pipeline, and is in seamless connection with the inner walls of the first sheath pipe and the second sheath pipe.

In some preferred embodiments of the present invention, when the air transmission pipeline is disposed outside the first sheath and the second sheath, the inflation port is disposed on a side of the air bag facing the first sheath. More preferably, a protective layer is arranged on the outer side of the gas transmission pipeline, covers the outer side of the gas transmission pipeline, and is in seamless connection with the outer walls of the first sheath pipe and the second sheath pipe.

Fig. 7 is a schematic view of an inflated balloon on a second sheath according to some embodiments of the present invention. Referring to fig. 7, the balloon 131 is inflated to form an oval or circular shape on the outside of the second sheath 12, and the outer wall of the balloon 131 presses against the bronchial wall of the human body to fix the second sheath 12.

Fig. 8 is a flow chart of a method of using a guide sheath in some embodiments of the invention. Referring to fig. 8, the method of using the guide sheath includes the steps of:

s1: inserting the guide sheath into a working channel of an endoscope;

s2: observing the bronchus of the human body through the endoscope, and extending the guide sheath into the target position of the bronchus of the human body;

s3: locking the position of the guiding sheath relative to the human bronchus by the locking structure;

s4: and a sampling instrument is connected into the guide sheath tube for sampling.

Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the appended claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.

Claims

1. A guiding sheath, comprising:

2. The guiding sheath of claim 1, wherein the first sheath and the second sheath are bonded or fused to each other.

3. The guiding sheath of claim 1, wherein the second sheath comprises:

a metal tube in a hollow tubular shape;

the joint part is in a hollow tubular shape, the outer wall of the joint part is attached to the inner wall of the metal pipe, and the joint part is connected with the first sheath pipe.

4. The guiding sheath as claimed in claim 1, wherein the second sheath is made of a hard polymer material, and a developing ring is disposed on an outer side of an end of the second sheath away from the first sheath, and a distance from an end port of the second sheath away from the first sheath is 2-5 mm.

5. The guiding sheath of claim 3, wherein the second sheath has a length of 5-10 mm.

6. The guiding sheath of claim 3, wherein the junction is 2-7mm in length within the metal tube.

7. The guiding sheath of claim 3, wherein one end of the second sheath is of a crevasse structure, and the crevasse structure is expanded to form a flared structure.

8. The guiding sheath of claim 7, wherein the breaching structure comprises 2-16 breaches.

9. The guiding sheath of claim 7, wherein the maximum inner diameter of the flare structure is 0.05mm-1.5mm greater than the minimum inner diameter.

10. The guiding sheath tube of claim 7, further comprising an outer sleeve, wherein the outer sleeve is sleeved on the outside of the second sheath tube, and a side of the outer sleeve away from the breach structure is provided with a control structure, and the control structure is configured to control the outer sleeve to slide on the outside of the second sheath tube to control the breach structure to expand or contract.

11. The guiding sheath of claim 7, wherein the material of the breaching structure is a memory alloy.

12. The guiding sheath of claim 1, further comprising a gas delivery conduit disposed inside or outside the first sheath and the second sheath.

13. The guiding sheath of claim 12, wherein the locking structure comprises a balloon having at least one inflation port thereon, the inflation port being in communication with the gas delivery conduit.

14. The guiding sheath of claim 13, wherein the balloon is 5-10mm in length when uninflated.

15. The guiding sheath according to claim 1, wherein the first sheath and the second sheath are provided with continuous graduation marks on the outer side thereof in the length direction.