Medical cutting guide wire

Abstract

The medical cutting guide wire comprises a guide wire body and a groove, the guide wire body comprises a metal core and a wrapping layer wrapping the metal core, the guide wire body is provided with a near end and a far end, the near end is provided with a conveying mandrel, the far end is provided with a guide wire head, and the guide wire head is connected with the conveying mandrel. The groove is formed in one end, close to the guide wire head, of the guide wire body, and extends from the coating layer to one side of the metal core to the metal core, so that the metal core is exposed out of the coating layer. The groove is formed in one side of the guide wire head, so that the metal core is exposed out of the coating layer, the metal core at the position of the groove can be electrified through high-frequency electric connection to the metal core, bile duct stenosis lesion can be cut off through high frequency in an operation, the guide wire has an electric cutting function, the instrument replacement frequency is reduced in the operation, the operation time is shortened, and the operation efficiency is improved. And the pain of the patient is relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical guide wires, and more particularly to a medical cutting guide wire. BACKGROUND

[0002] Cholangiostrictia is caused by cholangio injury and recurrent cholangitis or is caused by congenital cholangio lumen cicatricial narrowing.

[0003] Common cholecystitis, gallbladder stones, bile duct stones and other diseases cause inflammation in the bile duct lumen, and repeated inflammation causes the fibrous tissue of the bile duct wall to proliferate and thicken, leading to expansion inward.

[0004] Cholangiostrictia can cause bile discharge obstruction, elevated bile duct pressure, and bile stasis. Long-term can cause secondary bile duct stones, cholangitis, gram-negative intestinal bacillus infection and other hazards. Long-term repeated attacks can eventually exacerbate gallbladder damage and liver cell damage, leading to gallbladder necrosis or cirrhosis, and severe cases can lead to gallbladder cancer or liver cancer and other serious diseases.

[0005] Currently, therapeutic ERCP (endoscopic retrograde cholangiopancreatography) has been widely used to treat short-term and long-term cholangiostrictia, and the ERCP operation steps include:

[0006] Preoperative preparation: including comprehensive assessment of patient's history and signs, perfecting preoperative examination, ensuring patient's fasting and effective preoperative communication to obtain informed consent.

[0007] Anesthesia and mirror insertion: usually intravenous anesthesia is used, the patient takes a suitable position, the endoscope is inserted through the mouth, and the esophagus, stomach and duodenal descending segment are entered.

[0008] Contrast and treatment: adjust the endoscope position to make the duodenal papilla in the center of the field of view, then insert the guide wire and inject contrast agent through the catheter for contrast. According to the contrast result, the doctor will perform corresponding treatment operation, such as sphincterotomy, stone removal or stent placement, etc.

[0009] It can be seen that when the operation is performed under the guidance of the endoscope, the endoscope first enters the human body to find the lesion, the guide wire enters the human body from the endoscope channel and performs contrast through the catheter, and then the appropriate electrotome is used for operation. In the operation, the replacement of instruments makes the operation more complicated, and prolongs the operation time and causes pain to the patient.

[0010] Therefore, the prior art needs to be improved. Practical new type content

[0011] The purpose of the present application is to provide a medical cutting guide wire, which aims to solve the technical problem of how to provide a guide wire with electrotomy function in the prior art.

[0012] To achieve the above object, the present application adopts the technical scheme of:

[0013] The present application provides a medical cutting guide wire, which comprises:

[0014] A guide wire body comprising a metal core and a cladding layer wrapped around the metal core, the guide wire body having a proximal end and a distal end, the proximal end being provided with a delivery mandrel, and the distal end being provided with a guide wire head connected with the delivery mandrel;

[0015] A groove provided at one end of the guide wire body close to the guide wire head, the groove extending from the cladding layer to the side of the metal core and reaching the metal core so that the metal core is exposed to the cladding layer.

[0016] In one embodiment, the groove is provided as an annular groove.

[0017] In one embodiment, the length of the groove is set to 2-4 mm.

[0018] In one embodiment, the present application further comprises:

[0019] A handle connected to one end of the delivery mandrel away from the guide wire head, and the handle having an electrode for connecting with the metal core.

[0020] In one embodiment, the guide wire head is provided with a developing spring, the developing spring being sleeved on and connected with the metal core, and the side of the cladding layer close to the guide wire head being provided as a polymer cladding layer, the polymer cladding layer wrapping around the metal core and the developing spring.

[0021] In one embodiment, the polymer cladding layer comprises:

[0022] A polyurethane resin layer or an amide resin layer.

[0023] In one embodiment, the polymer cladding layer is covered with a hydrophilic coating.

[0024] In one embodiment, the length of the guide wire head is 5-7 cm.

[0025] In one embodiment, the side of the cladding layer close to the delivery mandrel is provided as a polytetrafluoroethylene cladding layer, and the surface of the polytetrafluoroethylene cladding layer is provided with spiral stripes.

[0026] In one embodiment, the guide wire head comprises one of the following structures:

[0027] A straight guide wire head, an inclined L-shaped guide wire head and a J-bent guide wire head.

[0028] The medical cutting guide wire provided in the application has at least the following beneficial effects:

[0029] The application discloses a medical cutting guide wire, which comprises a guide wire body and a groove, the guide wire body comprises a metal core and a cladding layer wrapped around the metal core, the guide wire body has a proximal end and a distal end, the proximal end is provided with a delivery mandrel, the distal end is provided with a guide wire head, the guide wire head is connected with the delivery mandrel, the groove is arranged at one end of the guide wire body close to the guide wire head, the groove extends from the cladding layer to one side of the metal core and reaches the metal core, so that the metal core is exposed to the cladding layer. By opening the groove at one side of the guide wire head, the metal core is exposed to the cladding layer, the metal core at the groove position can be electrified by high-frequency electricity, the stricture lesion of the bile duct can be removed by high-frequency cutting in the operation, the guide wire has the function of electric cutting, the number of instrument replacement is reduced in the operation, the operation time is shortened, and the pain of the patient is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 The use state reference diagram of the medical cutting guide wire provided in the embodiments of the application is shown in the figure;

[0032] Figure 2 The structure schematic diagram of the groove in the medical cutting guide wire provided in the embodiments of the application is shown in the figure;

[0033] Figure 3 The structure schematic diagram of the handle provided in the embodiments of the application is shown in the figure;

[0034] Figure 4 The structure schematic diagram of the specific embodiment of the medical cutting guide wire provided in the embodiments of the application is shown in the figure;

[0035] Figure 5 The structure schematic diagram of the oblique L-shaped guide wire head provided in the embodiments of the application is shown in the figure;

[0036] Figure 6 The structure schematic diagram of the J-shaped guide wire head provided in the embodiments of the application is shown in the figure.

[0037] In the figures, various reference signs represent:

[0038] 100, guidewire body; 200, groove; 300, handle; 400, bile duct stenosis; 110, metal core; 120, cladding layer; 130, hydrophilic coating; 140, radiopaque spring; 121, polymeric cladding layer; 122, polytetrafluoroethylene cladding layer; 123, helical stripe; 101, proximal end; 102, distal end; 103, delivery mandrel; 104, guidewire tip; 310, electrode. DETAILED DESCRIPTION

[0039] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0040] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position shown in the drawings, and are only for the convenience of description, and cannot be understood as a limitation on the technical solutions. The terms "first", "second" are only for the purpose of convenient description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0041] Referring to Figure 1 and Figure 2 The present embodiment provides a medical cutting guidewire, which comprises a guidewire body 100 and a groove 200. The guidewire body 100 comprises a metal core 110 and a cladding layer 120 wrapped around the metal core 110. The guidewire body 100 has a proximal end 101 and a distal end 102. The proximal end 101 is provided with a delivery mandrel 103, and the distal end 102 is provided with a guidewire tip 104. The guidewire tip 104 is connected to the delivery mandrel 103. The groove 200 is arranged at one end of the guidewire body 100 close to the guidewire tip 104. The groove 200 extends from the cladding layer to one side of the metal core 110 and reaches the metal core 110, so that the metal core 110 is exposed to the cladding layer 120.

[0042] In the present embodiment, endoscopic retrograde cholangiopancreatography (ERCP) is an endoscopic technique used to examine and treat diseases of the biliary and pancreatic system. During this procedure, a doctor will insert a flexible endoscope through the mouth, through the esophagus, stomach, and finally into the duodenum. Then, the doctor will insert a guidewire through the endoscope, along the bile duct or pancreatic duct into the biliary and pancreatic system.

[0043] It can be seen that the guide wire can help the doctor accurately insert the catheter into the opening of the bile duct or pancreatic duct for contrast or treatment operation. When the guide wire reaches the position of the bile duct stenosis 400, the medical cutting guide wire can be connected to high frequency electricity, so that the exposed metal core 110 of the groove 200 is electrified to cut the bile duct stenosis 400, avoiding the replacement of the high frequency electric knife.

[0044] Therefore, the embodiment can expose the metal core 110 by opening the groove 200 on one side of the guide wire head 104, so that the metal core 110 is exposed to the covering layer 120. The metal core 110 at the position of the groove 200 can be electrified by high frequency electricity, so that the bile duct stenosis 400 lesion can be removed by high frequency in the operation. The guide wire has the function of electric cutting, which reduces the number of instrument replacement and shortens the operation time, and reduces the pain of the patient.

[0045] Specifically, referring to Figure 2 , the groove 200 is arranged as a ring-shaped groove 200.

[0046] In the embodiment, the ring-shaped groove 200 is arranged on the periphery of the metal core 110, that is, the groove 200 surrounds the metal core 110 for one turn, and the exposed metal core 110 can cut the bile duct stenosis 400 in any direction. For example, when the guide wire head 104 reaches the position of the bile duct stenosis 400, the exposed metal core 110 at the position of the groove 200 is arranged in the bile duct stenosis 400, and then the high frequency electricity is connected to cut the bile duct stenosis 400. The ring-shaped groove 200 can avoid rotating the guide wire head 104, and does not need to adjust the angle, which is convenient to operate and has high working efficiency.

[0047] Optionally, the length of the groove 200 is 2-4mm.

[0048] For example, the length of the groove 200 is 2-4mm, which does not affect the guiding effect of the guide wire head 104, and at the same time, the metal core 110 close to the side of the guide wire head 104 is partially exposed, and the function of the electric knife is realized when electrified.

[0049] Preferably, the length of the groove 200 is 3mm, so that the guide wire head 104 has the functions of guiding and electric knife, so as to improve the operation efficiency and reduce the pain of the patient.

[0050] Specifically, referring to Figure 3 , it also includes a handle 300 connected to the end of the delivery mandrel 103 away from the guide wire head 104, and the handle 300 has an electrode 310 for connecting with the metal core 110.

[0051] In the embodiment, the guide wire body 100 proximal end 101 is provided with a delivery mandrel 103, the guide wire body 100 distal end 102 is provided with a guide wire head 104, the guide wire body 100 is connected with the handle 300 through the delivery mandrel 103, and the handle 300 is connected with the metal core 110 through the electrode 310. When the guide wire head 104 reaches the position of the bile duct stenosis 400, the exposed metal core 110 in the groove 200 is placed in the bile duct stenosis 400, and then high frequency electricity is provided through the electrode 310 of the handle 300, so that the exposed metal core 110 in the groove 200 is electrified to cut the bile duct stenosis 400, so as to realize the guiding and cutting functions of the guide wire body 100.

[0052] Specifically, referring to Figure 4 , the guide wire head 104 is provided with a developing spring 140, the developing spring 140 is sleeved on the metal core 110 and connected with the metal core 110, and the covering layer 120 is provided with a polymer covering layer 121 on the side close to the guide wire head 104, and the polymer covering layer 121 wraps the metal core 110 and the developing spring 140.

[0053] In the embodiment, the developing spring 140, the metal core 110 and the polymer covering layer 121 realize the excellent performance of the guide wire head 104, the polymer covering layer 121 can add metals such as gold, platinum and tungsten or compounds of metals, and the polymer covering layer 121 can be developed in X-ray, and has good twist control and pushing property in the process of pushing the guide wire.

[0054] Optionally, referring to Figure 4 , the polymer covering layer 121 includes a polyurethane resin layer or an amide resin layer.

[0055] For example, the polymer covering layer 121 can include a polyurethane resin layer to improve the softness and directivity of the guide wire head 104.

[0056] For example, the polymer covering layer 121 can include an amide resin layer to improve the softness and directivity of the guide wire head 104.

[0057] Specifically, referring to Figure 4 , the polymer covering layer 121 is covered with a hydrophilic coating 130.

[0058] In the embodiment, the polymer covering layer 121 is covered with the hydrophilic coating 130 to realize the super slip property of the guide wire head 104. For example, the hydrophilic coating 130 can adopt a polyvinylpyrrolidone coating to improve the super slip property of the guide wire head 104.

[0059] Optionally, the length of the guide wire head 104 is 5-7 cm.

[0060] For example, the length of the guide wire head 104 is 5-7 cm, the guide wire head 104 is soft and super smooth, and can adapt to complex pipelines during pushing, thereby playing a good guiding role.

[0061] Preferably, the length of the guide wire head 104 is 6 cm to achieve a good guiding role.

[0062] Specifically, referring to Figure 4 , the polytetrafluoroethylene coating layer 122 is arranged on the side close to the delivery mandrel 103, and the surface of the polytetrafluoroethylene coating layer 122 is provided with spiral stripes 123.

[0063] In this embodiment, the polytetrafluoroethylene coating layer 122 has a low friction coefficient, which can improve the pushing property of the guide wire, and the surface of the polytetrafluoroethylene coating layer 122 is provided with spiral stripes 123, which can enhance the tactile sensation and improve the operability.

[0064] Optionally, the guide wire head 104 includes one of the following structures:

[0065] a straight guide wire head, an inclined L-shaped guide wire head, and a J-bend guide wire head.

[0066] For example, referring to Figure 4 , the guide wire head 104 can include a straight guide wire head, which has good flexibility and operability and can be used for interventional therapy of blood vessels and cavities.

[0067] For example, referring to Figure 5 , the guide wire head 104 can include an inclined L-shaped guide wire head, which is usually used to guide a catheter into a deeper blood vessel or cavity. The inclined L-shaped guide wire head can better adapt to the depth of the blood vessel or cavity, thereby improving the accuracy and safety of the operation.

[0068] For example, referring to Figure 6 , the guide wire head 104 can include a J-bend guide wire head, which is usually used to guide a catheter into a curved blood vessel or cavity. The J-bend guide wire head can better adapt to the curvature of the blood vessel or cavity, thereby reducing damage to the surrounding tissues.

[0069] Specifically, the metal core 110 can be made of an elastic alloy, for example, the metal core 110 can include nickel-titanium alloy or stainless steel.

[0070] In summary, the application discloses a medical cutting guide wire, which comprises a guide wire body and a groove, the guide wire body comprises a metal core and a cladding layer wrapped around the metal core, the guide wire body has a proximal end and a distal end, the proximal end is provided with a delivery mandrel, the distal end is provided with a guide wire head, the guide wire head is connected with the delivery mandrel, the groove is arranged at one end of the guide wire body close to the guide wire head, the groove extends from the cladding layer to one side of the metal core and reaches the metal core, so that the metal core is exposed to the cladding layer. The application opens the groove on one side of the guide wire head, so that the metal core is exposed to the cladding layer, the metal core at the groove position can be electrified by high-frequency electricity on the metal core, the stricture lesion of the bile duct can be cut off by high-frequency in the operation, the guide wire has the function of electric cutting, the number of instrument replacement is reduced in the operation, the operation time is shortened, and the pain of the patient is reduced.

[0071] The above merely describes the preferred embodiments of the application, and is not used to limit the application, and any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A medical cutting guide wire, characterized by, The utility model relates to a guide wire head and a guide wire, and relates to the medical field. The guide wire body comprises a metal core and a cladding layer wrapped around the metal core, and has a proximal end and a distal end, wherein the proximal end is provided with a delivery mandrel, and the distal end is provided with a guide wire head connected with the delivery mandrel. A groove is arranged at one end of the guide wire body close to the guide wire head, and the groove extends from the cladding layer to one side of the metal core and reaches the metal core, so that the metal core is exposed to the cladding layer.

2. The medical cutting guide wire of claim 1, wherein, The groove is arranged as an annular groove.

3. The medical cutting guide wire of claim 1, wherein, The length of the groove is 2-4 mm.

4. The medical cutting guide wire of claim 1, wherein, Further comprising: A handle is connected to one end of the delivery mandrel away from the guide wire head, and the handle has an electrode for connecting with the metal core.

5. The medical cutting guide wire of claim 1, wherein, The guide wire head is provided with a developing spring sleeved on and connected with the metal core, and the side of the cladding layer close to the guide wire head is arranged as a polymer cladding layer wrapped around the metal core and the developing spring.

6. The medical cutting guide wire of claim 5, wherein, The polymer cladding layer comprises: A polyurethane-based resin layer or an amide-based resin layer.

7. The medical cutting guide wire of claim 5, wherein, The polymer cladding layer is covered with a hydrophilic coating.

8. The medical cutting guide wire of claim 1, wherein, The length of the guide wire head is 5-7 cm.

9. The medical cutting guide wire of claim 1, wherein, The side of the cladding layer close to the delivery mandrel is arranged as a polytetrafluoroethylene cladding layer, and the surface of the polytetrafluoroethylene cladding layer is provided with spiral stripes.

10. The medical cutting guide wire of claim 1, wherein, The guide wire head comprises one of the following structures: A straight guide wire head, an inclined L-shaped guide wire head and a J-bent guide wire head.

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