A guide wire, guide device and jejunostomy system

Abstract

The present application relates to the field of medical devices, in particular to a guide wire, a guide device and a jejunostomy system, comprising the following components: a main guide wire, which is bendable; a release point, which is located on the main guide wire and can be disconnected to divide the main guide wire into two segments; a capture point, which is located on the main guide wire and is staggered with the release point. The present application can guide the jejunum feeding tube inserted into the stomach cavity to smoothly insert into the jejunum, without cutting the jejunum, greatly reducing the intubation difficulty of the jejunum feeding tube, without causing additional trauma to the patient, avoiding additional gastric stoma hole trauma caused by unsuccessful surgery, and achieving minimally invasive implantation with a simple implantation process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a guide wire, a guide device and a jejunostomy system. BACKGROUND

[0002] Esophageal cancer is a common digestive tract tumor in clinical practice. If the patient does not receive timely treatment, he will eventually die of starvation due to inability to eat as the disease progresses. The patient has symptoms such as different degrees of difficulty in swallowing and obstruction of eating before surgery, combined with postoperative digestive tract reconstruction. If the nutritional therapy is not in place, malnutrition will occur and increase the postoperative complications of the patient. For such patients, two nutritional support approaches are usually used, namely parenteral nutrition and enteral nutrition. Parenteral nutrition is mainly intravenous nutrition. After long-term parenteral nutrition support, the morphology and function of the intestine will be abnormal, which can damage the immune system of the body. Long-term parenteral nutrition can even cause atrophy of the intestinal mucosa. In comparison, enteral nutrition is more in line with the physiological needs of the body and can maintain the normal structure and function of the intestinal mucosa. Commonly used enteral nutrition support includes a nasoenteric feeding tube and a jejunostomy tube. The nasoenteric feeding tube is suitable for patients with normal intestinal function, and the jejunostomy tube is suitable for patients who have undergone esophageal cancer surgery and digestive tract reconstruction, especially patients who need postoperative radiotherapy or chemotherapy. The jejunostomy tube is usually placed under laparoscopy. In this method, the jejunostomy tube needs to be cut after the rectum is found, and the non-working end is sutured. The working end is connected to the liquid device outside the body, and the liquid device outside the body is used to input nutrients into the body for the patient to absorb.

[0003] The above jejunostomy scheme can solve the problem of jejunum nutrition input for the patient, but the above method needs to form a hole in the stomach wall first, and then the jejunum nutrition tube is implanted into the jejunum in a blind insertion manner through the hole. The intubation is difficult and the placement is difficult. Once the jejunum nutrition tube cannot be placed into the target position through the stomach cavity, the pre-formed hole in the stomach wall will cause additional trauma to the patient and cannot achieve the purpose of jejunum nutrition tube implantation, so it needs to be solved urgently. SUMMARY

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present application provides a guide wire which can guide the jejunum nutrition tube inserted into the stomach cavity to be smoothly inserted into the jejunum. The present application also provides a guide device and a jejunostomy system.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A guide wire, comprising the following components:

[0007] A main guide wire, which can be bent;

[0008] A release point located on the main guide wire, which can be disconnected to divide the main guide wire into two segments;

[0009] A capture point is provided on the main guide wire and is located away from the release point.

[0010] As a further aspect of the present application, the main guide wire has a bifurcation point, and the main guide wire is bifurcated into two separate forked ends from the bifurcation point, the two forked ends being a release guide wire for arranging the release point and a traction guide wire for arranging the capture point, respectively.

[0011] As a further aspect of the present application, the diameter of the release guide wire is smaller than the diameter of the traction guide wire.

[0012] As a further aspect of the present application, the capture point is a traction loop arranged at the end of the traction guide wire away from the bifurcation point, and the traction loop is tangent to the traction guide wire.

[0013] As a further aspect of the present application, the distance between the release point and the bifurcation point of the main guide wire is smaller than the distance between the capture point and the bifurcation point of the main guide wire.

[0014] A guide device comprises the following components:

[0015] A guide core is provided with a working channel through which the guide wire passes.

[0016] A release assembly is arranged in the guide core and is used to disconnect the release point.

[0017] As a further aspect of the present application, the guide device further comprises a guide tube which is inserted into the target area along the working channel, and the main guide wire reaches the target area along the lumen of the guide tube.

[0018] As a further aspect of the present application, the working channel is opened in the guide core.

[0019] As a further aspect of the present application, the release assembly is arranged on the insertion path of the main guide wire, and the release assembly disconnects the release point by at least one of physical release, chemical release, electrolytic release, thermal release or photorelease.

[0020] As a further aspect of the present application, the guide core is a soft endoscope.

[0021] As a further aspect of the present application, the front end of the endoscope is provided with a light-emitting element as a light source and a photosensitive element which receives and converts reflected light signals into image information and outputs.

[0022] As a further aspect of the present application, the light-emitting element is at least one optical fiber, and the photosensitive element is one of an electrical coupling device, a solid-state image sensor, and a contact image sensor.

[0023] A jejunal fistula system comprises the following components:

[0024] The guiding device;

[0025] The capture assembly is externally inserted into the capture area and captures the traction guide wire through the capture point;

[0026] The jejunal feeding tube can be pushed along the captured traction guide wire into the jejunum.

[0027] As a further scheme of the present application, the capture assembly comprises a capture catheter externally inserted into the capture area, and the capture guide wire enters the capture area along the capture catheter, and the capture guide wire is provided with a capture claw for capturing the capture point.

[0028] As a further scheme of the present application, the jejunal feeding tube is provided with an input port on the tube body outside the body for inputting the drug and / or nutrient liquid into the lumen of the jejunal feeding tube, and the tube body is provided with an output port in the jejunum for outputting the drug or nutrient liquid in the lumen to the jejunum.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] 1. The main guide wire of the present application has two forked ends, and the bifurcations form a traction guide wire and a release guide wire, respectively, which can complete the release task and the traction task, respectively. After the release guide wire is disconnected, the traction guide wire and the main guide wire are left in the jejunum, and the capture point is waiting to be captured. Since the release guide wire is thinner than the traction guide wire, it can be smoothly bent and enter the jejunal feeding tube along the traction guide wire after being captured, and the patient's body feels better. The traction ring is designed to be tangent to the traction guide wire, which is easier to be captured and is more rounded, and is less likely to cause damage to the human body tissue. Through reasonable design of the release point and the capture point position, the bending amplitude of the release guide wire is smaller, and it is easier to enter the jejunal feeding tube and is less likely to be entangled.

[0031] 2. The present application inserts a guide core into the jejunum along the digestive tract through the nasal cavity or oral cavity. Under the visual navigation of the guide core, it can smoothly enter the jejunum and judge the conditions in the jejunum or stomach cavity. By opening a working channel inside it, the main guide wire can directly reach the jejunum along the working channel. At this time, the guide core is withdrawn from the jejunum to the stomach cavity, and the release assembly can disconnect the release guide wire under the visual feedback of the guide core. After the release guide wire is disconnected, the traction guide wire can be disconnected from the working channel and left in the stomach cavity. After the establishment of the gastrostomy, the traction guide wire in the stomach cavity can be used as a guide to guide the jejunal feeding tube to enter the jejunum from the outside of the body through the gastrostomy and the stomach cavity in turn, without the need to cut off the jejunum, greatly reducing the difficulty of intubation of the jejunal feeding tube, without causing additional trauma to the patient, avoiding additional trauma to the gastrostomy hole caused by unsuccessful surgery, and simplifying the implantation process, which can realize minimally invasive implantation.

[0032] 3、The present application can confirm that the traction guide wire reaches the stomach cavity, and then the release guide wire can be released, at this time, the traction guide wire and the main guide wire can be used as the introduction guide wire of the jejunum nutrition tube, a bridge between the stomach cavity and the jejunum is established, the nutrition liquid can be successfully transported from the outside of the body to the jejunum after the jejunum nutrition tube is introduced, and the whole process is better for the patient; the release guide wire can be released by physical release, chemical release, electrolytic release, thermal release or photolysis, and the selection range is wide.

[0033] 4、The guide core of the present application can be selected from a soft endoscope, which has the characteristics of soft material and can be bent, and the insertion end of the endoscope can adjust the angle, the endoscope has small volume and is easy to operate for doctors; through the cooperation of optical fiber bundles with different emission wavelengths, the individualized needs of doctors in clinical operation can be met, such as adjusting the brightness of the field of view according to the brightness of the observed field of view, mainly playing a role in illuminating the jejunum or stomach cavity, and through the real-time transmission of image information at the position of the endoscope, the clinician can timely and accurately master the actual placement situation of the guide wire, shorten the placement time, reduce the pain of the patient, and meet the visual placement requirements.

[0034] 5、The light emitting element and the light sensing element can cooperate to emit imaging detection light towards the target position, receive imaging response light from the target position, determine the central direction deviation of the position of the endoscope relative to the target position based on the distribution of the signal strength of the imaging response light in the imaging optical fiber bundle, and the image recorded by the light sensing element can meet the visual requirements of high pixels and high quality in clinical observation; after obtaining the image information of the target position, the condition in the intestine can be judged, the placement time can be shortened, and the pain of the patient can be reduced.

[0035] 6、After the gastric fistula is placed into the stomach cavity to capture the guide tube, the capture guide wire can be placed into the stomach cavity along the capture guide tube, the traction guide wire can be pulled out of the body along the capture guide tube through the cooperation of the capture claws and the traction ring on the capture guide wire and the traction guide wire, at this time, the jejunum nutrition tube is sleeved outside the traction guide wire, the traction guide wire can establish a bridge between the stomach cavity and the jejunum, and the jejunum nutrition tube can be placed into the jejunum, and the subsequent drugs and nutrition liquid can reach the jejunum through the input port, the lumen and the output port of the jejunum nutrition tube in turn. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The structure diagram of the guide assembly of the embodiment of the present application is shown.

[0037] Figure 2a The structure diagram of the first embodiment of the release assembly of the present application is shown.

[0038] Figure 2b The structure diagram of the second embodiment of the release assembly of the present application is shown.

[0039] Figure 2c Structure diagram of the fourth embodiment of the releasing assembly of the present application.

[0040] Figure 2d Structure diagram of the fourth embodiment of the releasing assembly of the present application.

[0041] Figure 2e Structure diagram of the fifth embodiment of the releasing assembly of the present application.

[0042] Figure 3 Structure diagram of the endoscope of the embodiment of the present application.

[0043] Figure 4 Structure diagram of the capturing assembly of the embodiment of the present application.

[0044] Figure 5 Structure diagram of the jejunum nutrition tube of the embodiment of the present application.

[0045] Figure 6 Structure diagram of the state before releasing of the embodiment of the present application.

[0046] In the figure:

[0047] 1, jejunum nutrition tube; 11, input port; 12, output port;

[0048] 2, guiding assembly; 21, guiding tube;

[0049] 22, main body guide wire; 221, traction guide wire; 2211, traction ring;

[0050] 222, releasing guide wire; 2221, releasing section; 2222, insulating coating;

[0051] 3, endoscope; 31, photosensitive element; 32, light emitting element; 33, working channel;

[0052] 4, capturing assembly; 41, capturing catheter; 42, capturing guide wire; 43, grabbing claw;

[0053] 5, releasing assembly; 51, releasing cavity; 52, positioning pin; 53, hot melting probe;

[0054] 54, spacer; 541, dissolving cavity; 55, adsorption layer; 56, laser probe. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0056] Referring to Figures 1 to 6 In the embodiments of the present application, a guide wire, a guide device and a jejunostomy system include a guide core, which is used to guide the placement of a guide assembly 2. The guide core has a working channel 33 formed therein to allow the guide core to enter the jejunum from the oral cavity or nasal cavity along the digestive tract, and then allow the guide assembly 2 to reach the jejunum cavity along the working channel 33 from the outside of the body.

[0057] The guide core is preferably an endoscope 3, which is flexible and soft in material. The front end of the endoscope 3 has a specific curvature, and the material thereof can be a memory alloy, so that the curvature can be changed under external force and quickly restored.

[0058] The design of the curvature can cooperate with the forward, backward and rotation operations during the placement of the endoscope 3, thereby improving the visual range of the operator to facilitate the subsequent search for the optimal jejunum tube placement position.

[0059] To realize the visual navigation of the endoscope 3, the endoscope 3 is provided with a light-emitting element 32 and a light-sensitive element 31 at the front end, as shown in Figure 3

[0060] The light-emitting element 32 serves as a light source and includes one or more optical fibers, so that different wavelength fiber bundles can be emitted. One or more imaging fiber bundles extend longitudinally along the central axis of the endoscope 3, and each of the one or more imaging fiber bundles is attached with an objective lens at the front fiber end face, which has a size comparable to that of the imaging fiber bundle.

[0061] Through the cooperation of the different wavelength fiber bundles, the individual needs of the clinical operation of the doctor can be met, such as adjusting the brightness of the field of view according to the brightness of the observed field of view, which mainly plays a role in illuminating the target position, so as to facilitate the clinician to timely and accurately grasp the actual placement situation of the guide assembly 2 at the target position.

[0062] The light-sensitive element 31 is one of an electrical coupling device, a solid-state image sensor and a contact image sensor. The light-emitting element 32 can emit imaging detection light towards the target position and receive imaging response light from the target position, so that the central direction deviation of the position of the endoscope 3 relative to the target position can be determined based on the distribution of the signal intensity of the imaging response light in the imaging fiber bundle.

[0063] The light-sensitive element 31 has a light-sensitive unit, which can convert an image into an electrical signal, and then convert the electrical signal into a digital image that can be observed by the doctor through an analog-to-digital converter, so as to complete data acquisition and image recording, etc. The light collection efficiency of the electrical coupling device, the solid-state image sensor and the contact image sensor is high, so that the recorded image can meet the visual requirements of high pixels and high quality in clinical practice, and the doctor can observe conveniently. ​

[0064] The photosensitive element 31 can also be a CMOS (complementary metal oxide semiconductor) sensor or a CCD (charged coupled device) sensor.

[0065] The CMOS is a complementary metal oxide semiconductor, which is mainly made of silicon and germanium. The basic functions are realized by the negative and positive transistors on the CMOS, and the current generated by the two complementary effects can be recorded and interpreted into images by the processing chip. The CCD has the characteristics of high sensitivity, but the response speed is low, and it is not suitable for high-resolution progressive scanning used in high-definition monitoring cameras. In comparison, the CMOS sensor usually includes an image sensor core (which transmits discrete signal levels to a single output, similar to a CCD image sensor), all timing logic, a single clock, and programmable functions within the chip, such as gain adjustment, integration time, window, and analog-to-digital converter. That is, the CMOS sensor includes all systems such as image array logic registers, memory, timing pulse generators, and converters. Compared with traditional CCD image systems, integrating the entire image system on a chip not only reduces power consumption, but also has the advantages of lighter weight, reduced space occupation, and lower overall price, and is more suitable for clinical medical collection and capture.

[0066] The working channel 33 in the endoscope 3 is arranged axially along the endoscope 3, and the guide assembly 2 can enter the jejunum along the working channel 33 under the direct vision of the endoscope 3; on the other hand, physiological saline can be injected through the working channel to flush the jejunum to facilitate imaging.

[0067] The endoscope 3 can also include a front end, a bending section, an insertion section, and an operation section connected in sequence, and the front end, the bending section, the insertion section, and the operation section form a complete hose.

[0068] The endoscope 3 can also be replaced by the following structure, and the working channel 33 is opened in the following structure for the guide assembly 2 to pass through:

[0069] A small-diameter tubular crawling robot can be selected, which crawls from the nasal cavity to the jejunum segment in the body through remote control or manual control. The shell of the robot is made of medical materials. The head of the robot can be equipped with a camera and a light source, and the image information of the position of the head is transmitted in real time to determine whether the target position is reached.

[0070] A shorter tubular object can also be selected, which is made of medical materials, and is connected to form a multi-section long tube structure through universal joints, movable joints and other connecting structures to intervene in the body, and a camera and a light source are installed at the front end to transmit the image of the position of the head in real time to determine whether the target position is reached.

[0071] The guide assembly 2 comprises a guide tube 21 which is a soft tube preferably sized to fit the working channel 33 so as to be advanced or retracted along the working channel 33 to reach the jejunum or to be withdrawn from the body.

[0072] The main guide wire 22 can be pre-fixed in the guide tube 21 and advanced into the jejunum synchronously with the guide tube 21 or be advanced into the jejunum along the guide tube 21 from the outside of the body after the guide tube 21 reaches the jejunum.

[0073] When the main guide wire 22 enters the jejunum, the endoscope 3 and the guide tube 21 are withdrawn into the stomach cavity as shown in Figure 6 The main guide wire 22 is detached under the visual navigation of the endoscope 3 and the detached main guide wire 22 can be captured in the stomach cavity.

[0074] The main guide wire 22 is preferably designed as a "γ" shape with a bifurcation point at which two prongs are formed, i.e. a traction guide wire 221 and a detachment guide wire 222. The detachment guide wire 222 has a smaller diameter than the traction guide wire 221. The main guide wire 22 extends from the jejunum into the stomach cavity with the bifurcation forming the traction guide wire 221 in the stomach cavity and the detachment guide wire 222 extending from the nasal or oral cavity to the outside of the body through the guide tube 21. The endoscope 3 and the guide tube 21 are withdrawn into the stomach cavity and the detachment guide wire 222 is detached under the visual navigation of the endoscope 3.

[0075] After the detachment guide wire 222 is detached, the main part of the main guide wire 22 and the traction guide wire 221 remain in the stomach cavity. The traction guide wire 221 can be provided with a traction loop 2211 for capturing the traction guide wire.

[0076] To facilitate the capturing of the traction guide wire 221, a capturing assembly 4 can be provided to enter the stomach cavity through a gastrostomy to capture the traction guide wire 221.

[0077] The capturing assembly 4 is preferably a capturing catheter 41 which can enter the stomach cavity through a gastrostomy as shown in Figure 4 The capturing guide wire 42 enters the stomach cavity from the outside of the body along the capturing catheter 41 to capture the traction guide wire 221.

[0078] The capturing guide wire 42 is preferably provided with a claw 43 at the end thereof. The traction guide wire 221 is provided with a loop-shaped traction loop 2211 at the end thereof. The traction loop 2211 is preferably arranged tangentially to the traction guide wire 221. The traction guide wire 221 is captured by hooking the traction loop 2211 with the claw 43. After the traction guide wire 221 is pulled out of the body, the capturing catheter 41 is withdrawn from the stomach cavity and the jejunum feeding tube 1 is sleeved on the traction guide wire 221 so that the jejunum feeding tube 1 enters the jejunum along the traction guide wire 221.

[0079] The capture guide wire 42 can be a shape memory alloy wire with good bending performance. The outer wall of the capture guide wire 42 and the capture conduit 41 can be coated with a hydrophilic coating to reduce surface friction, facilitate subsequent grasping operations, and improve their guiding ability.

[0080] The capture assembly 4 can also be equipped with a traction ring at the end of the capture guide wire 42 and a claw at the end of the traction guide wire 221, which can also complete the capture operation of the traction guide wire 221.

[0081] In another embodiment, a set of magnetic attraction structures can be provided at the ends of the capture guide wire 42 and the traction guide wire 221. When the capture guide wire 42 enters the gastric cavity, it can be attracted and captured by magnetic attraction, thereby moving the traction guide wire 221 out of the body along the capture catheter 41.

[0082] Throughout the release and capture process, Endoscope 3 provides the operator with visual motion feedback.

[0083] Jejunal feeding tube 1 Figure 5 As shown, the jejunal feeding tube 1 is a cylindrical tube that can be made of silicone or other biomaterials (such as non-toxic, high-strength, acid-resistant, and temperature-resistant polyurethane material), and its body is elastic. The lumen of the tube serves as a supply channel for the infusion of externally administered drugs or nutrient solutions into the jejunum.

[0084] The jejunal feeding tube 1 has an external opening that serves as an inlet 11, allowing medications or nutritional solutions to be administered into the tube lumen.

[0085] The jejunal feeding tube 1 can also have its external opening sealed, and a side inlet can be opened on the external tube wall to deliver medication or nutrient solution.

[0086] The jejunal feeding tube 1 can also have a side inlet on the tube wall located outside the body, so that the tube opening and the side inlet of the jejunal feeding tube 1 located outside the body can be used as inlets at the same time, so that drugs and nutrient solutions can be delivered separately.

[0087] The inlet 11 of the jejunal feeding tube 1 can be sealed normally with a cap whose diameter matches that of the inlet 11, thus preventing the entry of external substances and preventing reflux.

[0088] The jejunal feeding tube 1 has an outlet 12 located inside the jejunum, allowing the drugs and nutrient solutions in the tube to flow directly into the jejunum.

[0089] The jejunal feeding tube 1 can also have side outlet holes on the tube wall located inside the jejunum to dissipate medications and nutrient solutions. There are no restrictions on the number and arrangement of the side outlet holes, but they are usually evenly spaced along the length of the jejunal feeding tube 1, and the distance between adjacent side outlet holes can be set to 3 cm.

[0090] The input port 11 and the output port 12 can be provided with electromagnetic switches to control opening and closing, or can be provided with manual switches to be manually opened or closed before the tube is placed.

[0091] To avoid damaging soft tissues in the body, the output port 12 of the jejunum nutrient tube 1 is usually designed as an arc surface without sharp segments, so as not to cause damage to soft tissues during movement.

[0092] To facilitate observation of the depth of the jejunum nutrient tube 1, scale lines can be uniformly provided on the tube wall, and the scale lines are usually provided in centimeters as a scale unit. The scale lines can be provided on the outer tube wall, and when the jejunum nutrient tube 1 is a transparent tube body, the scale lines can also be provided on the inner tube wall of the jejunum nutrient tube 1.

[0093] The release assembly 5 can be an independent section of a tubular object, independently arranged on the tube wall of the working channel 33 or the guide tube 21, and the release assembly 5 can also be a part of the working channel 33 or the guide tube 21.

[0094] The release assembly 5 has a cylindrical release cavity 51 for the passage of the main body guide wire 22, and the release guide wire 222 is provided with a release section 2221, which can be disconnected after reaching the release cavity 51.

[0095] When the release guide wire 222 passes through the release cavity 51 of the release assembly 5, the release section 2221 can be disconnected by physical release, chemical release, electrolytic release, thermal release, and photorelease, and the specific release methods are as follows:

[0096] As shown in Figure 2a , the physical release method is adopted, and the release cavity 51 is provided with a positioning pin 52 capable of generating a clamping action, and the positioning pin 52 is preferably provided with two groups and can move radially to clamp and fix the release guide wire 222. The release guide wire 222 includes two sections that are not connected, and the ends of the two sections of the release guide wire 222 are fixed by a buckle structure, and the buckle structure is the release section 2221. The positioning pin 52 can be driven by electric power remote control, and the position of the positioning pin 52 corresponds to the position of one section of the adjacent main body guide wire 22 of the two sections of the release guide wire 222. After the positioning pin 52 clamps the section of the release guide wire 222, the operator pulls the other section of the release guide wire 222 until the two sections of the release guide wire 222 are disconnected, and the physical release is completed.

[0097] In another embodiment of the physical release, the release guide wire 222 is an entire guide wire, which has a release section 2221, the material of the release section 2221 is different from that of the other sections of the release guide wire 222, and the tensile strength of the release section 2221 is lower than that of the other sections of the release guide wire 222. Similarly, after the positioning pin 52 is clamped, the release guide wire 222 is pulled outside until the release section 2221 is disconnected.

[0098] In another embodiment of physical release, two sets of positioning pins 52 may be provided in the release cavity 51, and the two sets of positioning pins 52 may move toward or away from each other along the axial direction of the release cavity 51 by electric drive, thereby breaking the release guide wire 222 by electric remote control.

[0099] like Figure 2b As shown, a thermal release method is adopted. At least one thermal fusion probe 53 is installed in the release chamber 51. The position of the thermal fusion probe 53 corresponds to the position of the release section 2221. After the thermal fusion probe 53 is activated, high temperature is generated, which melts the release section 2221. The material of the release section 2221 is different from the material of other sections of the release guide wire 222. A material with a lower melting point is used so that the activation of the thermal fusion probe 53 does not affect other materials except for the release section 2221.

[0100] like Figure 2c As shown, an electrolytic decoupling method is employed. The decoupling guide wire 222 can be energized. By changing the materials of the decoupling guide wire 222 and the decoupling section 2221, an electrolytic reaction occurs after energization, causing the decoupling section to dissolve and break. The specific electrolytic principle is existing technology and will not be elaborated further. The surfaces of the decoupling guide wire 222, the main guide wire 22, and the traction guide wire 221 can be coated with an insulating coating 2222, except for the decoupling section 2221, which is not coated to avoid damage to human tissues during electrolysis.

[0101] like Figure 2d As shown, a chemical release method is employed. Two sets of spacers 54 are placed within the release chamber 51, forming a sealed dissolution chamber 541. Each spacer 54 has an elastic hole at its center to allow guidewires of different diameters to pass through. The release guidewire 222 passes through the central hole of the two sets of spacers 54 until the release section 2221 is located within the dissolution chamber 541. The dissolution chamber 541 can be pre-filled with a reaction solvent, or a storage bag can be placed within it to pre-store the reaction solvent. After the release section 2221 reaches the dissolution chamber 541, the reaction solvent is released from the storage bag. The material of the release section 2221 differs from the material of other sections of the release guidewire 222, allowing it to chemically react with the reaction solvent and dissolve, thus dissolving the release guidewire 222.

[0102] An annular rubber ring is provided at the contact surface between the septum 54 and the guide wire to achieve a sealing effect. To prevent the leakage of the reaction solvent after the guide wire separates from the septum 54, an adsorption layer 55 is provided on the outer ring of the septum 54. The adsorption layer 55 is a sponge or other material that can adsorb the reaction solvent, thereby absorbing the reaction solvent and preventing it from flowing out.

[0103] like Figure 2eAs shown, in the light disengagement mode, at least one laser probe 56 can be arranged in the disengagement cavity 51 to generate high heat in the disengagement section 2221 by emitting laser light to melt the disengagement section 2221; the material of the disengagement section 2221 is different from that of other sections of the disengagement guide wire 222, and a material with a lower melting point is used so that the laser probe 56 does not affect other materials except the disengagement section 2221 after being started.

[0104] In addition to the above mode, the disengagement assembly 5 can also be used for cold disengagement, and the disengagement section 2221 can be subjected to cold treatment; the material of the disengagement section 2221 is different from that of other sections of the disengagement guide wire 222, and the disengagement section 2221 has low-temperature fragility, and the disengagement section 2221 is easy to break when the disengagement guide wire 222 is pulled in a low-temperature state, thereby completing the disengagement process.

[0105] In the above various disengagement modes, the material of the disengagement section 2221 can be adaptively selected according to different disengagement modes.

[0106] In order to facilitate the confirmation of the position of the disengagement section 2221, a mark point can be arranged on the disengagement guide wire 222, and the mark point can be observed by the endoscope 3 when the guide tube 21 is withdrawn to a predetermined position by the endoscope 3, and at this time, the position of the disengagement section 2221 also corresponds to the position of the disengagement assembly 5.

[0107] In addition, the target region mentioned in the present application usually refers to the jejunum, and the capture region usually refers to the stomach cavity.

[0108] The above describes the basic principles of the present application in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the present application are only examples and cannot be considered as the advantages, advantages, effects and the like that must be possessed by each embodiment of the present application. In addition, the above specific details are only for the purpose of example and understanding, and are not limited to the present application, and the above specific details are not required to realize the present application.

[0109] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply that the connection, arrangement, configuration must be as shown in the block diagram. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have" and the like are open-ended words, which mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0110] It is also important to note that the devices, apparatuses and methods described in the present application can be embodied in a variety of other forms, modi fications and alt ernatives, some of which have been discussed above and some of which are gathe red as wi ll be apparent to those reasonably skilled in the art. The described aspects and embodiments are to be considered in a descriptive sense only and not for purposes of limitation. Therefore, the scope of the present application is not to be determined strictly by the description in the specification but by the appended claims, and all changes that come within the meaning and range of equivalency of the claims are intended to be embraced therein.

[0111] The above description of disclosed aspects is intended to be illustrative, and not restrictive. Other aspects, including modifications and alternative forms, will be apparent upon reading the disclosure. The various aspects of the disclosure are defined in the appended claims, and the equivalents thereof.

[0112] The above description has been given by way of example and is not intended to limit the application. Although various example aspects and embodiments have been discussed above, those of ordinary skill in the art will appreciate certain variations, modifications, alterations, additions and subcombinations thereof.

Claims

1. A guide wire, characterized by The guide wire is used for jejunostomy and comprises the following components: a main guide wire, which is bendable; a release point, which is located on the main guide wire and can be disconnected to divide the main guide wire into two segments, one of which is left in the jejunum as a guide for a jejunum feeding tube, and the other of which can be withdrawn from the body; a capture point, which is located on the main guide wire and is offset from the release point, and is used to guide the jejunum feeding tube into the jejunum; the main guide wire has a bifurcation point, from which the main guide wire is divided into two separate forked ends, one of which is a release guide wire for arranging the release point, and the other of which is a traction guide wire for arranging the capture point, and after the release point is disconnected, the end of the traction guide wire away from the bifurcation point extends into the jejunum to form a continuous guide path from the jejunum to the stomach cavity.

2. A guide wire according to claim 1, wherein The diameter of the release guide wire is smaller than that of the traction guide wire.

3. The guide wire of claim 1, wherein The capture point is a traction ring arranged at the end of the traction guide wire away from the bifurcation point, and the traction ring is tangent to the position of the traction guide wire.

4. The guide wire of claim 1, wherein The distance between the release point and the bifurcation point of the main guide wire is smaller than the distance between the capture point and the bifurcation point of the main guide wire.

5. A guide device, characterized in that The guide device comprises the following components: a guide core, which is provided with a working channel through which a guide wire as claimed in any one of claims 1 to 4 passes; a release assembly, which is arranged in the guide core and is used to disconnect the release point.

6. A guide device according to claim 5, wherein The guide device further comprises a guide tube that is inserted into a target region along the working channel, and the main guide wire reaches the target region along the lumen of the guide tube.

7. A guide device according to claim 5, wherein The working channel is opened in the interior of the guide core.

8. A guide device according to claim 5, wherein The release assembly is arranged on the insertion path of the main guide wire, and the release assembly disconnects the release point by at least one of physical release, chemical release, electrolytic release, thermal release, or photorelease.

9. A guide device according to claim 5, wherein The guide core is a soft endoscope.

10. A guide device according to claim 9, wherein The front end of the endoscope is provided with a light-emitting element as a light source and a photosensitive element that receives and converts reflected light signals into image information and outputs them.

11. A guide device according to claim 10, wherein The light-emitting element is at least one optical fiber, and the photosensitive element is one of an electronic coupling device, a solid-state image sensor, and a contact image sensor.

12. An enterostomy system, characterized by The guide device comprises the following components: the guide device as claimed in claim 5; a capture assembly, which is inserted into a capture region from the outside of the body and captures the traction guide wire through the capture point; a jejunum feeding tube, which can be pushed into the jejunum along the captured traction guide wire.

13. The gastrojejunostomy system according to claim 12, wherein The capture assembly comprises a capture catheter that is inserted into the capture region from the outside of the body, and a capture guide wire that enters the capture region along the capture catheter, and the capture guide wire is provided with a capture claw for capturing the capture point.

14. The gastrojejunostomy system according to claim 12, wherein The jejunum feeding tube is provided with an input port on the tube body outside the body for inputting a drug and / or a nutrient liquid into the lumen of the jejunum feeding tube, and is provided with an output port on the tube body inside the jejunum for outputting the drug or the nutrient liquid in the lumen to the jejunum.

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