Nasal gastroscope guide gastrointestinal catheterization system based on guide wire

Abstract

The utility model provides a nasogastroscope-guided gastrointestinal catheterization system based on a guide wire. The nasogastroscope-guided gastrointestinal catheterization system comprises a nasogastroscope (1), an imbedding tube (2) and the guide wire (3), wherein the guide wire (3) is arranged in an instrument cavity of the nasogastroscope (1); the implantation tube (2) is arranged along the guide wire (3) to a target jejunum nutrition tube putting position; the diameter of the guide wire (3) is 0.4 mm to 1.8 mm; the length of the guide wire is 1-7 m, and the section, 2-8 cm long, of the front end of the guide wire (3) is a flexible section (3.9). The utility model has the advantages of simple structure, simplification of catheterization operation, reduction of the pain of a patient, reduction of medical risks, guarantee of the success rate of catheterization, and excellent technical effect; the method has huge economic value and social value.

Description

Technical Field

[0001] The utility model relates to the technical field of the design and application of the accessory structure of a flexible digestive endoscope, and particularly relates to a wire-based nasal gastroscope-guided gastrointestinal catheter placement system. Background Art

[0002] With the continuous development of society and the continuous improvement of people's living standards, various new auxiliary tools that help improve the medical effect are becoming more and more common. At present, when placing a jejunal nutrition tube and an intestinal obstruction catheter, a general gastroscope needs to carry the catheter into the jejunum. The catheter placement is complex, the patient suffers greatly, and the risk is high. Inserting a guide wire through a nasal gastroscope and then inserting a jejunal nutrition tube or an intestinal obstruction catheter along the guide wire is simple and convenient, the patient suffers less pain, and the success rate is high. However, there is currently no guide wire specifically designed for catheter placement through a nasal gastroscope. That is, there is a technical blank and a technical problem to be solved urgently. People are eager to obtain an auxiliary tool for facilitating gastrointestinal catheter placement - a wire-based nasal gastroscope-guided gastrointestinal catheter placement system. Content of the Utility Model

[0003] The utility model provides a wire-based nasal gastroscope-guided gastrointestinal catheter placement system. The invention purpose of the utility model is to insert a guide wire into the jejunum through a nasal gastroscope, and then insert a catheter into the jejunum along the guide wire to achieve a simpler and more operable catheter placement operation. At present, there is no special product for a guide wire for inserting a gastrointestinal catheter in the domestic and foreign medical markets, and it is necessary to research and invent to fill this blank.

[0004] The technical solution of the utility model is as follows:

[0005] The wire-based nasal gastroscope-guided gastrointestinal catheter placement system, the key technology of which is: it includes: a nasal gastroscope 1, an insertion tube 2, and a guide wire 3; in actual use, the nasal gastroscope 1 first enters the preset position in the human body independently, and then the guide wire 3 enters along the instrument cavity (also called "forceps channel") in the nasal gastroscope 1 until its front end is introduced into the preset position. Then, the nasal gastroscope 1 is withdrawn and the guide wire 3 is left behind. Then, under the guidance of the guide wire 3, the insertion tube 2 is introduced into the human body until the front end of the insertion tube 2 is placed in the preset position; then the guide wire 3 is withdrawn and the insertion tube 2 is left behind; among them:

[0006] The guide wire 3 is arranged in the instrument cavity (also called "forceps channel") of the nasal gastroscope 1; the insertion tube 2 is arranged along the guide wire 3 until the target position, the placement position of the jejunal nutrition tube; the guide wire 3 can enter along the forceps channel of the nasal gastroscope 1 without being arranged in the forceps channel in advance;

[0007] The diameter of the guide wire 3 is 0.4 mm to 1.8 mm; the length of the guide wire is 1 m to 7 m, and a 2-8 cm long section at the front end of the guide wire 3 is a flexible section 3.9, and the stiffness of the flexible section 3.9 is significantly smaller, and it can prevent puncturing human tissues.

[0008] The wire-based nasal gastroscope-guided gastrointestinal catheterization system of the present utility model preferably claims the following technical content:

[0009] The wire 3 has a multi-layer structure from the inside out, specifically including a metal core 3.1, a protective layer 3.2, and a hydrophilic outer coating 3.3; among them: the thickness of the hydrophilic outer coating 3.3 ≤ 0.2 mm, and the hydrophilic outer coating 3.3 has a small friction with silicone products, which is suitable for use with silicone tubes; the cross-sectional diameter size of the metal core 3.1 accounts for more than 60% of the total cross-sectional diameter of the entire wire 3; the outermost diameter of the wire 3 is 0.4 mm to 1.2 mm.

[0010] A further preferred requirement is: the thickness of the hydrophilic outer coating 3.3 ≤ 0.1 mm; the cross-sectional diameter size of the metal core 3.1 accounts for more than 70% of the total cross-sectional diameter of the entire wire 3;

[0011] The outermost diameter of the wire 3 is 0.63 mm to 0.97 mm (corresponding to 0.025 inches to 0.038 inches).

[0012] The insertion tube 2 meets one of the following requirements:

[0013] First, the insertion tube 2 is a jejunal feeding tube, and the outer wall diameter of the tube is 2 mm to 20 mm; the corresponding length of the wire 3 is 2 to 4 meters;

[0014] Second, the insertion tube 2 is an intestinal obstruction catheter, and the outer wall diameter of the tube is 1.5 mm to 20 mm; the corresponding length of the wire 3 is 4 to 6 meters.

[0015] The outermost layer of the wire 3 is provided with a fixed-length mark 3.4 starting from the very front end of the self-insertion end; the fixed-length mark 3.4 is one of the following: a hydrophilic coating with stripes having a fixed-length interval that is distinct from the background color, a hydrophilic coating with spots having a fixed-length interval that is distinct from the background color, a hydrophilic coating with a scale or a strip structure substituting for the scale having a fixed-length interval that is distinct from the background color.

[0016] The fixed-length interval of the fixed-length mark 3.4 provided on the outermost layer of the wire 3 is one of the following or a combination thereof: 10 cm, 20 cm, 50 cm, 100 cm;

[0017] A 4 - 6 cm long section at the front end of the wire 3 is a flexible section 3.9.

[0018] The insertion tube 2 meets one of the following requirements:

[0019] First, the insertion tube 2 is a jejunal feeding tube, and the outer wall diameter of the tube is 12 mm to 18 mm; the corresponding length of the wire 3 is 2 to 4 meters;

[0020] Second, the insertion tube 2 is an intestinal obstruction catheter with an outer wall diameter of 10 mm to 16 mm; the corresponding guide wire 3 has a length of 4 to 6 meters.

[0021] Color markings are made at the 1-meter, 2-meter, 3-meter, and 4-meter positions of the soft tip of the guide wire.

[0022] The outer coating of the guide wire 3 is a hydrophilic outer coating 3.3, which has a small friction with silica gel products and is particularly suitable for use in conjunction with the tubular structure of silica gel material most commonly used in jejunal feeding tubes or intestinal obstruction catheters.

[0023] The fixed-length mark 3.4 is the outermost hydrophilic outer coating 3.3 of the guide wire 3, which is a two-color hydrophilic material layer with a spiral zebra color with equal pitch (fixed-length pitch).

[0024] The beneficial effects of the present utility model are as follows:

[0025] 1. The guide wire-based nasal gastroscope-guided gastrointestinal catheter placement system of the present utility model overcomes the technical problem in the prior art that a common gastroscope must be used to carry a catheter for the placement of a jejunal feeding tube or an intestinal obstruction catheter, significantly relieves the pressure on patients and medical staff, reduces the technical difficulty, and greatly alleviates the harsh conditions of complex catheter placement, great pain for patients, and high risk in the prior art. The present utility model inserts the guide wire 3 through a nasal gastroscope, and then inserts the inserted tubular structure along the guide wire 3 to the target position, realizing the simplification of the catheter placement operation, significantly reducing the medical risk, and improving the catheter placement success rate.

[0026] 2. The present utility model can achieve rapid catheter placement based on a nasal gastroscope (preferably a jejunal feeding tube or an intestinal obstruction catheter); it has a simple structure, the corresponding medical operation is simple, the operability is strong, and the technical effect is excellent.

[0027] 3. The outermost hydrophilic outer coating 3.3 of the guide wire of the present utility model helps to minimize the friction between the guide wire 3 and the mating structure during actual operation, the corresponding medical operation is smooth, and rapid insertion of a jejunal feeding tube or an intestinal obstruction catheter can be achieved; it has great potential economic value and social value. Description of the Drawings

[0028] Figure 1 One of the schematic diagrams of the structure of the guide wire-based nasal gastroscope-guided gastrointestinal catheter placement system described in Embodiment 1;

[0029] Figure 2 One of the schematic diagrams of the structure of the guide wire-based nasal gastroscope-guided gastrointestinal catheter placement system described in Embodiment 1;

[0030] Figure 3 One of the schematic diagrams of the local structure of the guide wire;

[0031] Figure 4 For Figure 3 A cross-sectional view taken along line A-A of Detailed implementation manners

[0032] The present utility model will be further described below in conjunction with embodiments and the accompanying drawings of the specification, but not limited thereto.

[0033] Embodiment 1

[0034] The wire-based nasal gastroscope-guided gastrointestinal catheter placement system is as Figures 1 - 4 shown; the key technology thereof is: it includes: a nasal gastroscope 1, an insertion tube 2, and a guide wire 3; the nasal gastroscope 1 first independently enters a preset position in the human body, and then the guide wire 3 enters along the instrument cavity (also known as the "forceps channel") in the nasal gastroscope 1 until its front end is introduced into the preset position. After that, the nasal gastroscope 1 is withdrawn and the guide wire 3 is left behind. Then, under the guidance of the guide wire 3, the insertion tube 2 is introduced into the human body until the front end of the insertion tube 2 is placed at the preset position; then the guide wire 3 is withdrawn and the insertion tube 2 is left behind; wherein:

[0035] The guide wire 3 is arranged in the instrument cavity of the nasal gastroscope 1; the insertion tube 2 is arranged along the guide wire 3 until the target position, the jejunal feeding tube placement position;

[0036] The diameter of the guide wire 3 is 0.4 mm to 1.8 mm; the length of the guide wire is 1 m to 7 m. A 5-cm-long section at the front end of the guide wire 3 is a flexible section 3.9, and the stiffness of the flexible section 3.9 is significantly smaller, and it can prevent puncturing human tissues.

[0037] The guide wire 3 is a multi-layer structure from the inside out, specifically including a metal core 3.1, a protective layer 3.2, and a hydrophilic outer coating 3.3; wherein: the thickness of the hydrophilic outer coating 3.3 ≤ 0.1 mm, and the friction between the hydrophilic outer coating 3.3 and silicone products is small, which is suitable for the use of silicone tubes; the cross-sectional diameter size of the metal core 3.1 accounts for more than 70% of the total cross-sectional diameter of the entire guide wire 3; the outermost diameter of the guide wire 3 is 0.63 mm to 0.97 mm (corresponding to 0.025 - 0.038 inches).

[0038] The hydrophilic outer coating 3.3 specifically selects the hydrophilic super-slippery coating independently developed and patented by Jemet. It can lubricate the surfaces of medical devices in different clinical fields, adsorb and retain moisture, significantly reduce the surface friction resistance of medical devices, make the catheter easier to penetrate blood vessels, and can also avoid serious wear between the surface of the device and tissues / vessel walls, and exert the excellent performance of the device. Jemet jAqua TM The hydrophilic super-slippery coating still maintains its integrity and lubricity after more than 50 friction tests. The dynamic hydrogen bonding of the coating polymer matrix with surrounding water molecules, the entanglement of the biocompatible hydrophilic polymer with the supporting network forms a hydrogel material. When the hydrophilic coating comes into contact with water or body fluid, the surface of the coating will become lubricated and hydrophilic.

[0039] The hydrophilic outer coating 3.3 can be prepared using advanced ultraviolet curing technology. The lubricity, firmness, and thickness of the coating can all be adjusted. The protective layer 3.2 is a plastic layer, and the hydrophilic outer coating 3.3 is arranged outside the protective layer 3.2.

[0040] The placement tube 2 is a jejunal feeding tube, and the outer diameter of the tube wall is 12 mm to 18 mm; the corresponding guide wire 3 has a length of 2 to 4 meters.

[0041] The outermost layer of the guide wire 3 is provided with a fixed-length mark 3.4 calculated from the very front end of the self-insertion end; the fixed-length mark 3.4 is one of the following: a hydrophilic coating with stripes having a fixed-length interval that is distinct from the background color, a hydrophilic coating with spots having a fixed-length interval that is distinct from the background color, a hydrophilic coating with a scale or a strip structure replacing the scale having a fixed-length interval that is distinct from the background color.

[0042] The fixed-length interval of the fixed-length mark 3.4 provided on the outermost layer of the guide wire 3 is one of the following or a combination thereof: 10 cm, 20 cm, 50 cm, 100 cm; the fixed-length mark 3.4 is the hydrophilic outer coating 3.3 on the outermost layer of the guide wire 3, which is a two-color hydrophilic material layer with a helical zebra color having an equal pitch (fixed pitch).

[0043] The nasal gastroscope-guided gastrointestinal placement tube system based on the guide wire overcomes the technical problem in the prior art that a jejunal feeding tube and an intestinal obstruction catheter must be inserted using an ordinary gastroscope to carry the catheter, significantly relieves the pressure on patients and medical staff, reduces the technical difficulty, and greatly alleviates the poor situation of complex catheter placement, great pain for patients, and high risk in the prior art. The present utility model inserts the guide wire 3 through a nasal gastroscope, and then inserts the placed tubular structure along the guide wire 3 to the target position, realizing the simplification of the catheter placement operation, significantly reducing the medical risk, and improving the catheter placement success rate.

[0044] This embodiment can achieve rapid catheter placement based on a nasal gastroscope (preferably a jejunal feeding tube or an intestinal obstruction catheter); it has a simple structure, the corresponding medical operation is simple, the operability is strong, and the technical effect is excellent.

[0045] The hydrophilic outer coating 3.3 on the outermost part of the guide wire 3 in this embodiment helps to minimize the friction between the guide wire 3 and the mating structure during actual operation, the corresponding medical operation is smooth, and rapid insertion of a jejunal feeding tube or an intestinal obstruction catheter can be achieved; it has great potential economic value and social value.

[0046] Embodiment 2

[0047] This embodiment is basically the same as Embodiment 1, and the main differences are as follows:

[0048] The placement tube 2 is an intestinal obstruction catheter, and the outer diameter of the tube wall is 10 mm to 16 mm; the corresponding guide wire 3 has a length of 4 to 6 meters.

[0049] There is no protective layer 3.2 in the layered structure of the guide wire 3.

[0050] Example 3

[0051] A nasal gastroscope-guided gastrointestinal catheter placement system based on a guide wire, which includes: a nasal gastroscope 1, an insertion tube 2, and a guide wire 3; the nasal gastroscope 1 first independently enters a preset position in the human body, and then the guide wire 3 enters along the instrument cavity (also known as the "forceps channel") in the nasal gastroscope 1 until its front end is introduced into the preset position. Then, the nasal gastroscope 1 is withdrawn and the guide wire 3 is left behind. After that, under the guidance of the guide wire 3, the insertion tube 2 is introduced into the human body until the front end of the insertion tube 2 is placed at the preset position; then the guide wire 3 is withdrawn and the insertion tube 2 is left behind; among them:

[0052] The guide wire 3 is arranged in the instrument cavity of the nasal gastroscope 1; the insertion tube 2 is arranged along the guide wire 3 until the target position, the jejunal nutrition tube placement position.

[0053] The diameter of the guide wire 3 is 0.6 mm to 1.2 mm; the length of the guide wire is 3 m to 6 m. A 3-6 cm long section at the front end of the guide wire 3 is a flexible section 3.9, and the stiffness of the flexible section 3.9 is significantly smaller, and it can prevent puncturing human tissues.

[0054] The guide wire 3 is a multi-layer structure from the inside out, specifically including a metal core 3.1, a protective layer 3.2, and a hydrophilic outer coating 3.3; among them: the thickness of the hydrophilic outer coating 3.3 ≤ 0.2 mm, and the friction between the hydrophilic outer coating 3.3 and silicone products is small, which is suitable for use with silicone tubes; the cross-sectional diameter size of the metal core 3.1 accounts for more than 60% of the total cross-sectional diameter of the entire guide wire 3; the outermost diameter of the guide wire 3 is 0.4 mm to 1.2 mm; the outermost diameter of the guide wire 3 is 0.63 mm to 0.97 mm (corresponding to 0.025 - 0.038 inches).

[0055] The insertion tube 2 meets one of the following requirements: First, the insertion tube 2 is a jejunal nutrition tube, and the outer diameter of the tube wall is 14 mm or 16 mm; the corresponding length of the guide wire 3 is 2 - 4 meters; Second, the insertion tube 2 is an intestinal obstruction catheter, and the outer diameter of the tube wall is 12 mm or 14 mm or 16 mm; the corresponding length of the guide wire 3 is 4 - 6 meters.

[0056] The outermost layer of the guide wire 3 is provided with a fixed-length mark 3.4 starting from the very front end of the self-insertion end; the fixed-length mark 3.4 is one of the following: a hydrophilic coating with stripes with a fixed-length interval that is significantly different from the background color, a hydrophilic coating with spots with a fixed-length interval that is significantly different from the background color, a hydrophilic coating with a scale or a strip structure replacing the scale with a fixed-length interval that is significantly different from the background color.

[0057] The fixed-length interval of the fixed-length mark 3.4 provided on the outermost layer of the guide wire 3 is 50 cm or 100 cm.

[0058] The fixed-length mark 3.4 is provided with a color coating different from the background color at every 0.5 meters or 1 meter at the forefront of the flexible section 3.9 at the insertion end of the guide wire 3. And the colors of the fixed-length marks 3.4 provided on the hydrophilic outer coating 3.3 at every 0.5 meters or 1 meter are different from each other; during medical operations, the total length of the guide wire 3 entering the body can be accurately known according to the colors of the respective fixed-length marks 3.4.

[0059] The outer coating of the guide wire 3 is a hydrophilic outer coating 3.3, which has a small friction with silicone products and is particularly suitable for use in cooperation with the tubular structure made of silicone material, which is most commonly used in jejunal feeding tubes or intestinal obstruction catheters.

[0060] The fixed-length mark 3.4 is the outermost hydrophilic outer coating 3.3 of the guide wire 3, which is a two-color hydrophilic material layer with an equal pitch (fixed pitch) spiral zebra color.

[0061] Example 4

[0062] This example is basically the same as Example 3, and the main differences are as follows:

[0063] The guide wire 3 is a multi-layer structure from the inside out, specifically including a metal core 3.1 and a hydrophilic outer coating 3.3 (without a protective layer 3.2); among them: the thickness of the hydrophilic outer coating 3.3 ≤ 0.2 mm, the hydrophilic outer coating 3.3 has a small friction with silicone products and is suitable for use with silicone tubes; the cross-sectional diameter size of the metal core 3.1 accounts for more than 60% of the total cross-sectional diameter of the entire guide wire 3; the outermost diameter of the guide wire 3 is 0.63 mm to 0.97 mm (corresponding to 0.025 - 0.038 inches).

Claims

1. A guidewire-based nasogastric endoscope-guided gastrointestinal intubation system, characterized by: The device comprises: a nasogastric endoscope (1), an insertion tube (2), and a guide wire (3); wherein: The guide wire (3) is arranged in the instrument cavity of the nasogastric endoscope (1); the insertion tube (2) is arranged along the guide wire (3) until it reaches the target position of the jejunal nutrition tube placement position; The guide wire (3) has a diameter of 0.4 mm to 1.8 mm and a length of 1 m to 7 m. A 2 to 8 cm long section at the front end of the guide wire (3) is a flexible section (3.9).

2. The guidewire-based nasogastric endoscope-guided gastrointestinal catheterization system according to claim 1, characterized in that: The guide wire (3) is a multi-layer structure from the inside to the outside, specifically comprising a metal core (3.1) and a hydrophilic outer coating (3.3); wherein: the thickness of the hydrophilic outer coating (3.3) is ≤ 0.2 mm; the cross-sectional diameter of the metal core (3.1) accounts for more than 60% of the total cross-sectional diameter of the entire guide wire (3); The outermost diameter of the guide wire (3) is 0.4 mm to 1.2 mm.

3. The guidewire-based nasogastric endoscope-guided gastrointestinal catheterization system according to claim 2, characterized in that: The thickness of the hydrophilic outer coating (3.3) is ≤0.1 mm; the cross-sectional diameter of the metal core (3.1) accounts for more than 70% of the total cross-sectional diameter of the entire guide wire (3); The outermost diameter of the guide wire (3) is 0.63 mm to 0.97 mm.

4. The guidewire-based nasogastric endoscope-guided gastrointestinal catheterization system according to any one of claims 1 to 3, characterized in that: The insertion tube (2) meets one of the following requirements: First, the inserted tube (2) is a jejunal nutrition tube, and the outer wall diameter of the tube is 2 mm to 20 mm; the corresponding guide wire (3) is 2 to 4 meters long; Secondly, the insertion tube (2) is an intestinal obstruction catheter, and the outer wall diameter of the tube is 1.5 mm to 20 mm; the corresponding guide wire (3) is 4 to 6 meters long.

5. The guidewire-based nasogastric endoscope-guided gastrointestinal catheterization system according to claim 4, characterized in that: The outermost layer of the guide wire (3) is provided with a fixed-length mark (3.4) for calculating the length from the front end of the insertion end; the fixed-length mark (3.4) is one of the following types: a hydrophilic coating with patterns with fixed-length intervals that are clearly different from the background color, a hydrophilic coating with spots with fixed-length intervals that are clearly different from the background color, a hydrophilic coating with scales with fixed-length intervals that are clearly different from the background color, or a hydrophilic coating with a stripe structure that replaces the scales.

6. The guidewire-based nasogastric endoscope-guided gastrointestinal catheterization system according to claim 4, characterized in that: The outermost layer of the guide wire (3) is provided with fixed length marks (3.4) with fixed length intervals being one of the following or a combination thereof: 10 cm, 20 cm, 50 cm, 100 cm; A 4-6 cm long section at the front end of the guide wire (3) is a flexible section (3.9).

7. The guidewire-based nasogastric endoscope-guided gastrointestinal catheterization system according to claim 6, characterized in that: The outermost layer of the guide wire (3) is provided with fixed-length marks (3.4) with a fixed-length interval of 100 cm; A 5 cm long section at the front end of the guide wire (3) is a flexible section (3.9); A protective layer (3.2) is also provided between the metal core (3.1) and the hydrophilic outer coating (3.3) of the guide wire (3).

8. The guidewire-based nasogastric endoscope-guided gastrointestinal catheterization system according to claim 7, characterized in that: The insertion tube (2) meets one of the following requirements: First, the insertion tube (2) is a jejunal nutrition tube, and the outer wall diameter of the tube is 12 mm to 18 mm; the corresponding guide wire (3) is 2 to 4 meters long; Secondly, the insertion tube (2) is an intestinal obstruction catheter, and the outer wall diameter of the tube is 10 mm to 16 mm; the corresponding guide wire (3) is 4 to 6 meters long.

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