WO2021097613A1

WO2021097613A1 - Endoscope sheath tube

Info

Publication number: WO2021097613A1
Application number: PCT/CN2019/119188
Authority: WO
Inventors: 张一�
Original assignee: 苏州新光维医疗科技有限公司
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2021-05-27

Abstract

Disclosed is an endoscope sheath tube. The endoscope sheath tube comprises: a tube body (1); a moderate-hardness area, which is provided in the middle part of the interior of the tube body (1), such that the sheath tube can be bent at a bent portion of a human body; a low-hardness area, which is arranged at one end of the moderate-hardness area, such that the direction of the sheath tube entering the human body can be adjusted; and a high-hardness area, which is arranged at the other end of the moderate-hardness area, such that the sheath tube is conveniently held and placed. The endoscope sheath tube reduces the pain of a patient and the possibility of injuring the patient, can reach a more complex human organ lumen by cooperating with a sub-endoscope of an endoscope, and uses a multi-channel opening structure (4), such that multi-channel openings (401, 402) cooperate with each other to ensure that the sub-endoscope can smoothly reach an operation portion, so that a lithotripsy time can be shortened and the amount of bleeding and chance of postoperative infection can be reduced, and an operation is better completed.

Description

Endoscope sheath

Technical field

The invention relates to the technical field of sheaths for medical instruments, in particular to sheaths for endoscopes.

Background technique

An endoscope is a commonly used medical device that enters the human body through a natural orifice of the human body or a small incision made by an operation. Therefore, some people have developed a sheath to facilitate repeated feeding or exchange of instruments into the chamber.

There are many types of such sheaths on the market today, which can basically meet people's needs, but there are still certain shortcomings. The specific problems are as follows:

Traditional such sheaths are made of hard tubes. Due to the hard tube material, it will cause pain to the patient when inserted into the human body, and may also cause damage to the organ lumen. At the same time, the human lumen is mostly Curved, hard tube is not easy to bend.

(2) After the traditional sheath tube enters the cavity, the depth that can be reached is limited. The natural cavity of the human body is intricate and complicated. The traditional sheath tube cannot be used with an endoscope, so a clear view cannot be obtained, and it cannot be found in time. If the target needs treatment, surgery cannot be performed, which exacerbates the patient's condition.

(3) The traditional sheath tube of this kind uses a single-direction inner channel of the sheath tube, which cannot be freely adjusted to bend, and cannot take into account multiple required operations, which is not conducive to medical work.

Summary of the invention

The purpose of the present invention is to solve the above-mentioned problems, and an endoscope sheath is designed.

The technical solution of the present invention to achieve the above objective is that the endoscope sheath includes a tube body, and,

The moderate hardness zone is arranged in the middle part of the tube body, so that the sheath tube can be bent at the curved part of the human body;

The soft hardness zone is arranged at one end of the moderate hardness zone, so that the direction of the sheath tube entering the human body can be adjusted;

The harder-hardness zone is set at the other end of the moderate-hardness zone, so that it is convenient to take and place the sheath;

As a usable embodiment of the tube body, the tube body includes an auxiliary structure arranged on the upper and lower side walls, a sheath channel arranged between the auxiliary structures, and a multi-channel port structure arranged inside the hardness and soft zone , Wherein the sheath channel and the multi-channel port structure are matched and communicated.

Wherein, as a usable embodiment of the multi-channel port structure, the multi-channel port structure includes a first channel port disposed between the auxiliary structures inside the hardness and soft zone, and a first channel port disposed inside the hardness and soft zone. The second channel port of the auxiliary structure of the lower side wall, the first channel port and the sheath channel form the working channel 1, and the second channel opening and the sheath channel form the working channel 2.

Wherein, as an available embodiment of the auxiliary structure, the auxiliary structure includes an outer layer, an inner layer, a braided layer disposed between the outer layer and the inner layer, wherein the braided layer is provided with a braided layer inside the braided layer. Wire, the braided wire has a crisscross net structure.

The two sides of the second passage opening are arranged in an arc shape, and the curvature of the right side of the second passage opening is larger than that of the left side.

The outer layer is made of PA or PEBAX polymer material, the inner layer is made of PA or PTFE polymer material, and the braiding wire is made of stainless steel or nickel titanium wire.

The inner layer includes a four-way bending traction wire disposed close to the braided layer, the four-way bending traction wire is located at the quarter point of the inner layer, and is in a "cross" shape, which is convenient for the sheath to enter the human body The direction of the rear head is adjusted.

A lens is arranged at the front end of the hardness and soft zone, and the lens is connected with the four-way bending traction wire.

The beneficial effect is that the endoscope sheath not only reduces the pain and the possibility of injury caused by the hard tube, but also can enter deeper human organs to establish a working passage, and adopts a multi-channel port The structure makes the multi-channel ports cooperate with each other to better complete the work;

By using a variety of materials for the sheath, a variety of needs can be achieved. Using a softer material for the soft-hardness area can adjust the direction of the sheath into the human body; adopting a material with a moderate softness for the moderate-hardness area can realize the bending of the sheath at the curved part of the human body. When the sheath enters the chamber, according to the structure of the organ chamber, the sheath can be bent to the required angle by cooperating with the four-way bending traction wire. At the same time, the use of such a material can reduce the insertion of the sheath into the organ chamber to the patient The pain caused also reduces the possibility of damage to the organ cavity.

By adopting the endoscopic sheath, a working channel can be established in the body's organ cavity. Because the endoscope mirror is thin in order to enter a narrow working channel, the recoil and the strength of the insertion part are not high when entering, and it is difficult to control. It is not easy to enter the depths of the organ cavity. The sheath of the endoscope is harder than the endoscope mirror. Under the driving of the four traction wires, it is easy to control, so that it can penetrate into the organ cavity and reach longer distances. , So that the patient can be treated in time.

(3) By providing a multi-channel port structure, the observation channel and the operating channel can be separated without interfering with each other. The front end of the first channel port is equipped with a lens. By cooperating with the endoscope, the dynamics of the visible area can be observed, and the target can be found. Then the endoscope is allowed to go through the second channel port to reach the surgical site, which is carried out through the cooperation of surgical instruments. During the operation, a working channel is established through the sheath, which can shorten the lithotripsy time, reduce the amount of bleeding and postoperative infection.

Description of the drawings

Figure 1 is a schematic view of the structure of the present invention in front cross-section;

Figure 2 is a schematic structural view of a cross-section of the tube body of the present invention;

Fig. 3 is a partial enlarged schematic diagram of A in Fig. 2 of the present invention;

Figure 4 is a schematic diagram of the working state 1 of the present invention;

Fig. 5 is a schematic diagram of working state 2 of the present invention.

In the figure, 1. tube body; 2. auxiliary structure; 201, outer layer; 202, inner layer; 203, braided layer; 2031, braided wire; 3. sheath channel; 4. multi-channel port structure; 401, first Channel opening; 402. The second channel opening; 5. Four-way bending traction wire; 6. Lens

Detailed ways

The present invention will be described in detail below with reference to the drawings. As shown in Figure 1, the present invention consists of a tube body, which includes: a tube body 1, a moderate hardness zone arranged in the middle part of the tube body 1, and The soft hardness area at one end of the moderate hardness area, and the harder hardness area at the other end of the moderate hardness area.

In order to facilitate those skilled in the art to have a better understanding of the technical solution, the specific structure and principle of each of the above-mentioned devices will be described below in conjunction with accompanying drawings 1-5:

The upper and lower side walls of the tube body 1 are provided with an auxiliary structure 2, and a sheath channel 3 is provided between the auxiliary structure 2. The auxiliary structure 2 is divided into an outer layer 201, an inner layer 202, and an outer layer 201 and an inner layer 202. The braided layer 203 is provided with braided wires 2031 inside the braided layer 203, which are in a crisscross network structure; the outer layer 201 is made of PA or PEBAX polymer material, which is relatively smooth and resistant to friction; the inner layer 202 However, PA or PTFE polymer material is used, which is also relatively resistant to friction, so that the friction resistance is small and suitable for the entry and exit of instruments; the braided wire 2031 uses stainless steel or nickel-titanium wire, which can increase the bending resistance and strength of the catheter. The sheath can be used to establish a medical passage in the organ chamber by the endoscope, which can avoid the pain caused to the patient by the need to replace medical equipment. A sheath channel 3 is provided inside the tube body 1 for endoscopes or other The required equipment is easy to enter and exit, and the required operations can be completed in the sheath channel 3. The inner layer 202 is provided with a four-way bending traction wire 5 close to the braided layer 203, and the four-way bending traction wire 5 is located at the quarter point of the inner layer 202 and has a "cross" shape. The soft area of hardness is made of a softer material. When the soft area of hardness is in the human body, the direction can be adjusted by operating the four-way bending traction wire 5; the material of moderate hardness is used for the area of moderate hardness, and the area of moderate hardness is in the curved part of the human body. The sheath tube can be bent by operating the four-way bending traction wire 5. This can alleviate the pain caused by the sheath tube inserted into the organ cavity and reduce the possibility of damage to the organ cavity. Harder materials are used in the harder areas, so that the sheath can be easily taken and placed.

A multi-channel port structure 4 is arranged inside the soft hardness zone. The multi-channel port structure 4 includes a first channel port 401 disposed between the auxiliary structure 2 and a second channel port 402 of the auxiliary structure 2 on the lower side wall. The channel port structure 4 is adapted to and communicated with the sheath channel 3. The first channel port 401 and the sheath channel 3 form the working channel 1, and the second channel port 402 and the sheath channel 3 form the working channel 2. After the endoscope enters the working channel 1, by cooperating with the lens 6 set at the front end of the rigid and soft zone, the dynamics in the visible area can be seen, and the target can be found; by changing the direction of the endoscope, the endoscope is allowed to go With the second channel port 402, the endoscope enters the working channel 2. At the same time, the exit of the second channel port 402 is set in an arc shape, and the arc on the right is larger than that on the left. Operate with the cooperation of surgical instruments.

Because the endoscope mirror is very soft and difficult to control, it is difficult to enter the depth of the organ cavity, and the operation cannot be performed. The use of an endoscope sheath can establish a working channel in the organ cavity of the human body. It is harder than the endoscope mirror, and is driven by four traction wires, which is easy to control, so that it can reach a longer distance, so that the patient can be treated in time.

Because of its simple structure and low cost, the endoscopic sheath can be used as a one-time use. After the operation, the medical staff does not need to use a variety of drugs to sterilize the sheath, and directly use the new sheath, which avoids the need for disinfection. Insufficiency will cause infection to the next patient, ensure the hygiene of the sheath, reduce the workload of medical staff, and improve work efficiency.

Working principle: The staff prepares a clean and new sheath. First, the hardness and soft area of the sheath enters the organ cavity 1, and the staff operates the four-way bending traction wire 5 to adjust the direction in the organ cavity 1. When the organ cavity When a bend appears in the tract 1, by operating the four-way bending traction wire 5, the moderate hardness area is bent at the bend of the organ lumen 1, so that the sheath continues to advance in the organ lumen 1 and reaches the depth of the organ lumen 1 A working channel is set up, the sheath tube is indwelled in the body, and then the endoscope is allowed to enter the working channel (for this endoscope, please refer to the publication of application number 201811329058.5). The endoscope is first in the working channel 1 and enters the working state 1. Find the target area through the lens 6, and then switch the direction of the endoscope, let the endoscope switch to the working channel 2, enter the working state 2, enter the inside of the organ, and the endoscope enters the organ cavity 2 to reach the surgical site. When other medical devices are used, the staff can also enter and exit other medical devices through the working channel established by the sheath to perform surgical operations. After the operation is completed, the used sheath can be discarded. The next time the operation is performed, Use a new sheath.

The above technical solution only embodies the preferred technical solution of the technical solution of the present invention, and the possible changes to some parts of it by those skilled in the art all embody the principle of the present invention and fall within the protection scope of the present invention.

Claims

The endoscope sheath includes a tube body (1), characterized in that the tube body (1) includes:

The moderate hardness zone is arranged in the middle part of the inside of the tube body (1), so that the sheath can be bent at the curved part of the human body;

The soft hardness zone is arranged at one end of the moderate hardness zone, so that the direction of the sheath tube entering the human body can be adjusted;

The harder-hardness zone is arranged at the other end of the moderate-hardness zone, so that the sheath can be conveniently taken and placed.
The endoscopic sheath according to claim 1, wherein the tube body (1) comprises an auxiliary structure (2) arranged on the upper and lower side walls, and a sheath arranged between the auxiliary structure (2) A tube channel (3) and a multi-channel port structure (4) arranged inside the hardness and soft zone, wherein the sheath tube channel (3) and the multi-channel port structure (4) are adapted and communicated.
The endoscopic sheath according to claim 2, characterized in that the multi-channel port structure (4) comprises a first channel port arranged between the auxiliary structures (2) inside the hardness and soft zone (401). The second channel port (402) of the auxiliary structure (2) is arranged on the lower side wall inside the hardness and soft zone. The first channel port (401) and the sheath channel (3) form a working channel 1. The second channel port (402) and the sheath channel (3) form the working channel 2.
The endoscopic sheath according to claim 2, wherein the auxiliary structure (2) comprises an outer layer (201), an inner layer (202), and is arranged on the outer layer (201) and the inner layer. The braided layer (203) between the layers (202), wherein a braided wire (2031) is arranged inside the braided layer (203), and the braided wire (2031) has a crisscross network structure.
The endoscope sheath according to claim 3, characterized in that the two sides of the second passage opening (402) are arranged in an arc shape, and the curvature of the right side of the second passage opening (402) is greater than that of the left side.
The endoscope sheath according to claim 4, characterized in that the outer layer (201) is made of PA or PEBAX polymer material, and the inner layer (202) is made of PA or PTFE polymer material, braided wire (2031) Use stainless steel or nickel titanium wire.
The endoscope sheath according to claim 4, wherein the inner layer (202) comprises a four-way bending traction wire (5) arranged close to the braided layer (203), and the four-way bending The traction wire (5) is located at the quarter point of the inner layer (202) and is in the shape of a "cross", which facilitates the adjustment of the direction of the sheath tube entering the rear head of the human body.
The endoscope sheath according to claim 1, characterized in that a lens (6) is provided at the front end of the hardness and soft zone, and the lens (6) is connected with the four-way bending traction wire (5) .