Catheter for enteroscopy and confocal enteroscopy system

Abstract

The utility model discloses a catheter for enteroscopy and a confocal enteroscopy system, the catheter comprises a catheter handle and a catheter I which is connected with the catheter handle and can enter the enteroscopy catheter, the catheter I comprises a main body section and a plastic section which are connected in sequence, the catheter handle is a hollow tube, and the catheter handle is a hollow tube. The main body section is connected with the catheter handle, each of the main body section and the plastic section comprises an inner layer, a middle layer and an outer layer which are arranged from inside to outside, the hardness of the outer layer of the plastic section is between 10D and 40D, and the hardness of the outer layer of the main body section is between 67D and 76D. The hardness of the plastic section close to the front end of the catheter is lower, the plastic section can be pre-bent into various shapes or various angles, and when the confocal microendoscope is pushed in the operation process, the limitation of the angle is small, so that the problem that the confocal microendoscope is difficult to advance is solved.

Description

Technical Field

[0001] The utility model belongs to the field of endoscopes, and more specifically, relates to a catheter for enteroscopic examination and a confocal enteroscopic system. Background Art

[0002] The small intestine is the longest digestive tract in the human body. It is far away from the mouth and anus, overlaps and peristalsis, which brings certain difficulties to the examination and diagnosis of small intestinal diseases. Usually, small intestinal diseases are diagnosed by enteroscopy. Enteroscopy is a method of diagnosing and treating small intestinal diseases by inserting the endoscope through the mouth, anus, or through the mouth and anus. It completes a blind spot-free examination of the entire small intestine. In the clinical process, single-balloon electronic enteroscopes and double-balloon electronic enteroscopes can be used, both of which are collectively called balloon-assisted enteroscopes.

[0003] Enteroscopy is the most direct method for the diagnosis and treatment of small intestinal diseases. It can not only be used for the diagnosis and differential diagnosis of unexplained gastrointestinal bleeding, but also for the treatment of diseases such as small intestinal polyps. It is widely used in clinical practice. In recent years, in order to improve the rapid and accurate diagnosis of small intestinal diseases, confocal microendoscopy has been widely used in intestinal examinations. When using a confocal microendoscopy, the confocal microendoscopy must first be inserted into the small intestinal cavity through the enteroscope biopsy forceps channel. The end of the endoscope is gently attached to the surface of the observed mucosa to observe the image at the confocal laser scanning level. The observed images can help physicians quickly determine the patient's condition and develop a reasonable treatment plan.

[0004] During use, the confocal microendoscopy needs to pass through the enteroscope biopsy forceps channel to reach the detection site. Since the structure of the small intestine is relatively tortuous, the shape of the enteroscope after entering the small intestine will change with the change of the small intestine shape, making it difficult for the confocal microendoscopy to pass through the enteroscope forceps channel. Secondly, during confocal microendoscopy, since there will be dirt on the inner surface of the small intestine cavity, the front end of the confocal microendoscopy is easily adhered to the dirt in the cavity, causing blurred images or scars, thus affecting normal inspection and diagnosis. Utility Model Content

[0005] In view of the above defects or improvement needs of the prior art, the utility model provides a catheter and a confocal enteroscope system for enteroscopic examination, which aims to solve the problem that the confocal microendoscope is difficult to move in the enteroscope and is easy to be contaminated.

[0006] To achieve the above-mentioned purpose, according to one aspect of the utility model, a catheter for small enteroscopy is provided, comprising a catheter handle, and a catheter 1 connected to the catheter handle and capable of entering the small enteroscopy catheter, wherein the catheter 1 comprises a main body section and a plastic section connected in sequence, the catheter handle being a hollow tube, the main body section being connected to the catheter handle, the main body section and the plastic section both comprising an inner layer, a middle layer and an outer layer arranged from the inside to the outside, the outer layer hardness of the plastic section being between 30D and 40D, and the outer layer hardness of the main body section being between 67D and 76D.

[0007] Through the above technical solution, the plastic section near the front end of the catheter has a lower hardness and can be pre-bent into a variety of shapes or angles. When the confocal microendoscope is pushed during surgery, it is not restricted by angles, thus solving the problem of difficulty in moving forward.

[0008] Furthermore, a side wall of the catheter handle is provided with a liquid injection channel connected to the main body section.

[0009] Furthermore, a two-way valve is provided at the injection channel.

[0010] Furthermore, the inner layer of the plastic section is a lining tube, the middle layer is a flat wire mesh tube, and the outer layer is composed of a soft material. The main section and the joint of the plastic section are made of materials with similar hardness and gradually decreasing hardness.

[0011] Furthermore, the inner layer of the main body section is a liner tube, the middle layer is a tubular spring or a flat wire mesh tube, and the outer layer is a polymer material.

[0012] Furthermore, the flat wire mesh tube and tubular spring are wound with stainless steel flat wire and / or PEEK wire.

[0013] Furthermore, a catheter identification ring is provided on the inner wall of the front end of the plastic section.

[0014] Furthermore, a round chamfer is provided at the front end of the plastic section.

[0015] Furthermore, a sealing ring and a tightening knob for tightening the sealing ring are provided at the inlet end of the catheter handle.

[0016] The utility model also provides a confocal enteroscope system, comprising an enteroscope, a confocal microendoscope, and any of the aforementioned catheters, and also comprising a multi-way tube that can be connected to the instrument channel of the enteroscope, the multi-way tube being provided with a water injection channel and an instrument channel for the catheter to be inserted, the confocal microendoscope comprising a connected objective lens and an optical fiber, the optical fiber passing through the catheter, and the objective lens being provided at the front end of the plastic section.

[0017] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0018] (1) The problem of the difficulty of the confocal microendoscope in passing through the small intestine endoscopic forceps channel due to the tortuous structure of the small intestine was solved; by designing a plastic segment, the hard structure would not form a resistance to pushing during actual operation, thus solving the problem of difficulty in pushing when passing through a bend during operation.

[0019] (2) Since there may be dirt or tissue on the inner surface of the small intestinal cavity, the front end of the confocal microendoscope is easily adhered by foreign matter in the cavity, causing image blur or scarring, thus affecting normal inspection and diagnosis. Through the designed injection channel, flushing operations are performed to clean foreign matter at the front end, solving the problem of blurred images at the front end. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of the conduit in the utility model;

[0021] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0022] Figure 3 This is a schematic diagram of the pre-bending state of the plastic section of the catheter in the utility model;

[0023] Figure 4 It is a schematic diagram of the combination of the catheter in the utility model when used in combination with a small enteroscope.

[0024] In the figure, 1. catheter handle; 2. main body section; 3. plastic section; 4. round chamfer; 5. injection channel; 6. injection port; 7. catheter identification ring; 8. sealing ring; 9. tightening handle; 10. multi-way tube; 11. water injection channel; 12. instrument channel; 13. enteroscope operating handle; 14. enteroscope instrument channel; 15. enteroscope catheter; 16. balloon inflation port; 17. enteroscope outer sleeve; 18. balloon one; 19. balloon two; 20. confocal microendoscope. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] like Figure 1 and Figure 2As shown, the utility model proposes a catheter for small enteroscopic examination, including a catheter handle 1, a catheter one connected to the catheter handle 1 and capable of entering the small enteroscopic catheter, the catheter one including a main body section 2 and a plastic section 3 connected in sequence, the catheter handle 1 being a hollow tube, the main body section 2 being connected to the catheter handle 1, the main body section 2 and the plastic section 3 both including an inner layer, a middle layer and an outer layer arranged from the inside to the outside, the outer layer hardness of the plastic section 3 being between 30D and 40D, and the outer layer hardness of the main body section 2 being between 67D and 76D.

[0027] like Figure 3 As shown, the overall length of the catheter can be between 2300 and 2500 mm, and can be selected according to the matching instrument during use. The plastic section 3 has a lower hardness and can be pre-bent into a variety of shapes or angles. When the confocal microendoscope 20 is pushed during surgery, it is not restricted by angles, thereby solving the problem of difficulty in advancement.

[0028] Specifically, the outer layer of the main body section 2 may have a hardness of 72D and is made of a polymer material.

[0029] Furthermore, the side wall of the catheter handle 1 is provided with a liquid injection channel 5 connected to the main body section 2, and the side wall of the main body section 2 is provided with a liquid injection port 6 connected to the liquid injection channel 5. Liquid is injected through the liquid injection channel 5 to lubricate the interior of the catheter and flush the cavity. When the lens part of the confocal microendoscope 20 is attached with dirt, it can be withdrawn into the catheter to perform a cavity flushing operation to remove the dirt. In addition, the catheter can also be pushed to a designated position by pushing the catheter, and then the cavity is flushed.

[0030] Specifically, the inner layer of the plastic section 3 is an inner liner, the middle layer is a flat wire mesh tube, and the outer layer is composed of a soft material. The joint of the main section 2 and the plastic section 3 is made of materials with similar hardness and a gradual decrease in hardness. The inner layer of the main section 2 is an inner liner, the middle layer is a tubular spring or a flat wire mesh tube, and the outer layer is a polymer material. The inner liner runs through the entire catheter as the inner layer, and the flat wire mesh tube and the tubular spring are made of stainless steel flat wire and / or PEEK wire. The catheter of the utility model can have a certain degree of torsion resistance and folding resistance, which is convenient for better pushing during use.

[0031] Furthermore, the inner wall of the front end of the plastic section 3 is provided with a catheter identification ring 7, which can fix the internal accessories of the front end of the catheter and identify the position of the catheter.

[0032] Furthermore, the front end of the plastic section 3 is provided with a round chamfer 4. The round chamfer 4 makes the front end of the catheter more rounded and smooth, which can avoid damage to the mucous membrane in the human body during the pushing process.

[0033] Furthermore, a two-way valve is provided at the injection channel 5 to facilitate flow control and opening closing control during use.

[0034] Furthermore, a sealing ring 8 and a compression knob 9 for compressing the sealing ring 8 are provided at the inlet end of the catheter handle 1. The sealing ring 8 can play a sealing and compression role, and the sealing and compression effects of the sealing ring 8 can be adjusted by the compression knob 9.

[0035] like Figure 4 As shown, the utility model also provides a confocal enteroscope system, including an enteroscope, a confocal microendoscope 20, and any of the aforementioned catheters, and also includes a multi-way tube 10 that can be connected to the instrument channel of the enteroscope, the multi-way tube 10 is provided with a water injection channel 11 and an instrument channel 12 for the catheter to penetrate, the confocal microendoscope 20 includes a connected objective lens and an optical fiber, the optical fiber passes through the catheter, and the objective lens is provided at the front end of the plastic section 3.

[0036] During the use of the catheter, the catheter is first inserted into the small enteroscope biopsy forceps channel, and then the confocal microendoscope 20 is inserted into the catheter. The confocal microendoscope 20 and the catheter are inserted into the designated position along the small enteroscope biopsy forceps channel. Usually, the small enteroscope in the prior art is composed of a small enteroscope operating handle 13, a small enteroscope instrument channel 14, a small enteroscope catheter 15, an airbag inflation port 16, a small enteroscope outer sleeve 17, an airbag 18, and an airbag 2 19. The multi-way tube 10 cooperates with the small enteroscope instrument channel 14, and the multi-way tube 10 is fixed to the small enteroscope instrument channel 14. The front end 4 of the catheter, the plastic section 3, and the main section 2 enter the small enteroscope instrument channel 14 through the instrument channel 12 of the multi-way tube 10 in turn, and the confocal microendoscope 20 penetrates through the inside of the catheter. During the specific operation, the multi-channel tube 10 and the small intestine endoscope need to be assembled first, and then the catheter is assembled into the multi-channel tube 10; the confocal microendoscope 20 can also be pre-installed in the catheter, and then the catheter is assembled into the multi-channel tube 10.

[0037] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A catheter for small intestine endoscopy, characterized in that: The invention comprises a catheter handle (1), and a catheter 1 connected to the catheter handle (1) and capable of being inserted into a small enteroscope catheter. The catheter 1 comprises a main section (2) and a plastic section (3) which are connected in sequence. The catheter handle (1) is a hollow tube. The main section (2) is connected to the catheter handle. Both the main section (2) and the plastic section (3) comprise an inner layer, a middle layer and an outer layer arranged from the inside to the outside. The hardness of the outer layer of the plastic section (3) is between 10D and 40D, and the hardness of the outer layer of the main section (2) is between 67D and 76D.

2. The catheter according to claim 1, characterized in that The side wall of the catheter handle (1) is provided with a liquid injection channel (5) which is in communication with the main body section (2).

3. The catheter according to claim 2, characterized in that A two-way valve is provided at the injection channel (5).

4. The catheter according to claim 1, characterized in that The inner layer of the plastic section (3) is a lining tube, the middle layer is a flat wire mesh tube, and the outer layer is composed of a soft material. The joint between the main section (2) and the plastic section (3) is made of materials with similar hardness and a gradual decrease in hardness.

5. The catheter according to claim 1, characterized in that The inner layer of the main body section (2) is a liner tube, the middle layer is a tubular spring or a flat wire mesh tube, and the outer layer is a polymer material.

6. The catheter according to claim 5, characterized in that The flat wire mesh tube and tubular spring are wound with stainless steel flat wires and / or PEEK wires.

7. The catheter according to claim 1, characterized in that The inner wall of the front end (4) of the plastic section (3) is provided with a catheter identification ring (7).

8. The catheter according to claim 1, characterized in that The front end (4) of the plastic section (3) is provided with a round chamfer.

9. The catheter according to claim 1, characterized in that The inlet end of the catheter handle (1) is provided with a sealing ring (8) and a tightening rotary handle (9) for tightening the sealing ring (8).

10. A confocal enteroscope system, characterized in that: It comprises an enteroscope, a confocal microendoscope, and a catheter as described in any one of claims 1 to 9, and also comprises a multi-way tube (10) that can be connected to an instrument channel (14) of the enteroscope, the multi-way tube (10) being provided with a water injection channel (11) and an instrument channel (12) for the catheter to be inserted, the confocal microendoscope comprising a connected objective lens and an optical fiber, the optical fiber passing through the catheter, and the objective lens being provided at the front end (4) of the plastic section (3).

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