Water injection mucous membrane knife

Abstract

The invention relates to the technical field of medical instruments, in particular to a water injection mucous membrane knife. Comprising a scalpel head, a tube sheath, a traction wire, a locking sleeve, a rotating sleeve, a conductive column screw, a conductive column connecting tube, a finger ring and a handle, the handle is in sliding connection with the finger ring, an electrode socket is formed in the finger ring, the conductive column screw is arranged at the position of the electrode socket, and a water injection opening is formed in the end, opposite to the electrode socket, of the finger ring; by means of the design of the water injection mucous membrane knife, stripping or water injection before and during an endoscopic mucous membrane stripping operation can be achieved at the same time, the time for replacing surgical instruments is shortened, the surgical time of a doctor is saved, the surgical safety is higher, and the water injection mucous membrane knife is simple in structure and convenient to operate.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a water-injected mucosal knife. Background Art

[0002] Endoscopic technology has been around for more than 50 years and has gone through the stages from disease diagnosis to disease treatment. It has become very effective and reliable for the treatment of some digestive diseases and has even become the first choice for treatment. In recent years, with the development of endoscopic technology, endoscopic tissue biopsy, endoscopic mucosal resection (EMR), and endoscopic submucosal dissection (ESD) have been widely used. They are gradually becoming the first choice for the treatment of gastrointestinal bleeding, polypectomy, and early cancer. Among them, ESD plays a key role in the discovery, diagnosis, and removal of early cancer.

[0003] As an important means of treating digestive tract lesions, during endoscopic mucosal dissection, doctors often use a mucosal cutter to mark the lesion site first, then replace the injection needle to inject submucosal saline to elevate the position of the lesion, and then replace the mucosal cutter to dissect the lesion. Therefore, doctors frequently change surgical instruments during surgery to meet the different needs of each surgery. However, frequent replacement of surgical instruments is cumbersome and time-consuming, which is not conducive to patient surgery. Moreover, the saline injected during the operation will be lost as the operation time passes, and the process of re-injecting saline will waste a lot of time, increase the risk of perforation during surgery, and prolong the time of surgical operation due to the loss of saline during surgery. Therefore, the operation is not quick and convenient. Therefore, a water-injected mucosal cutter is designed to save operation time and reduce the risk of surgery. Summary of the invention

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a water-injected mucosal knife, which includes a knife head, a sheath, a traction wire, a locking sleeve, a rotating sleeve, a conductive column screw, a conductive column connecting tube, a finger ring and a handle, wherein the handle is slidably connected to the finger ring, an electrode socket is provided on the finger ring, the conductive column screw is arranged at the position of the electrode socket, a water injection port is provided on the end of the finger ring opposite to the electrode socket, a water injection pipe is provided at the inner end of the water injection port, the water injection pipe passes through the finger ring, one end of the water injection pipe is connected to the water injection port, and is electrically connected to the conductive column screw, and the finger ring can drive the water injection pipe to slide along the axial direction of the handle; the conductive column connecting tube is connected to the handle; the rotating sleeve is provided at the end of the conductive column connecting tube away from the finger ring, and the locking sleeve is connected to the rotating sleeve; the sheath is connected to the handle through the locking sleeve, and a traction wire is provided inside the sheath; a connecting piece is provided inside the front end of the sheath, the knife head is connected to the traction wire through the connecting piece, and an insulating piece is provided at the front end of the sheath.

[0005] Preferably, the cutter head is one of an I-shaped cutter head, an O-shaped cutter head, a T-shaped cutter head and an L-shaped cutter head.

[0006] Preferably, an insulating head is provided at the front end of the O-shaped blade head.

[0007] Preferably, a sheath tube is provided at one end of the sheath close to the locking sleeve, and the sheath tube is made of high-density polyethylene material.

[0008] Preferably, the outer diameter of the sheath is 2.4 mm, and the sheath is made of polytetrafluoroethylene.

[0009] Preferably, the traction wire is one of stainless steel or nickel-titanium alloy.

[0010] A method for using a water-injected mucosal knife, wherein: (1) First, check whether the sterilized packaging is damaged, contaminated, or soaked in water before use, and whether the seal is intact. Check the appearance to see if there are any damage, breaks, bends, or kinks. Check whether the blade model is consistent with the label, whether the blade is cracked or otherwise damaged, and whether the blade body is bent or otherwise deformed. Check whether the parts on the instrument are loose or separated; push and pull the finger ring to see if the blade can be flexibly extended and retracted; check whether the entire instrument can be flexibly extended and retracted in a circle (the diameter of the circle is about 20 cm); check the flushing function, use a syringe to inject sterile water or distilled water into the flushing port, and visually check whether the cutting knife tip can discharge water normally; (2) Preoperative endoscopy and endoscopic ultrasound to determine the location, extent, and depth of lesion invasion; (3) When the target tissue is clearly visible in the endoscopic field of view, pull the finger ring to completely retract the blade head into the sheath and hold the finger ring firmly. While confirming the endoscopic image, carefully insert the sheath into the working channel of the endoscope until the front end of the insertion part protrudes from the endoscope. (4) After the tip of the sheath enters the field of view, stop inserting the instrument and push the finger ring distally to allow the blade to extend from the tip of the sheath. Confirm that the blade and the tip of the sheath are within the field of view of the endoscope (the metal part of the end of the endoscope lens is not in contact with the blade), and that there is no mucus around the blade and the end of the endoscope lens. (5) Adjust the direction of the blade according to the target area, step on the foot switch to turn on the power. The power will only be turned on when the foot switch is pressed. Operate the blade while the power is on to cut, remove and peel the tissue. Do not turn on the power when the blade body contacts the tissue that you do not want to cut. When using the water injection function to cut the knife, you can use a syringe to inject sterile water or distilled water into the water injection port while cutting, removing and peeling the tissue; (6) After tissue cutting is completed, turn off the high-frequency power supply, confirm that the blade head is not adhered to the tissue, pull the finger ring to put the blade head into the sheath, and carefully remove it from the endoscope.

[0011] Beneficial effects: Compared with the prior art, the design of the water-injected mucosal knife in the present invention can simultaneously realize endoscopic mucosal dissection or water injection before and during surgery, reducing the time for replacing surgical instruments, saving doctors' operating time, making the surgery safer, and has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 It is a front end cutaway view of the present invention.

[0014] Figure 3 It is a schematic diagram of an I-type cutter head of the present invention.

[0015] Figure 4 It is a schematic diagram of an O-type cutter head of the present invention.

[0016] Figure 5 It is a schematic diagram of a T-shaped cutter head of the present invention.

[0017] Figure 6 It is a schematic diagram of the L-shaped cutter head of the present invention.

[0018] Figure 7 It is a structural cross-sectional view of the middle water injection port and the electrode socket position of the present invention.

[0019] In the attached drawings: 1-insulating head, 2-knife head, 3-sheath, 4-traction wire, 5-sheath tube, 6-locking sleeve, 7-rotating sleeve, 8-conductive column screw, 9-conductive column connecting tube, 10-finger ring, 11-handle, 12-water injection port, 13-insulating part, 14-connecting part, 15-water injection pipe. Implementation

[0020] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods. Example

[0021] Please refer to the drawings in the specification. In an embodiment of the present invention, a water-injected mucosal knife includes a knife head 2, a sheath 3, a traction wire 4, a locking sleeve 6, a rotating sleeve 7, a conductive column screw 8, a conductive column connecting tube 9, a finger ring 10 and a handle 11. The handle 11 is slidably connected to the finger ring 10. An electrode socket is provided on the finger ring 10. The conductive column screw 8 is arranged at the position of the electrode socket. A water injection port 12 is provided at the end of the finger ring 10 opposite to the electrode socket. A water injection port 12 is provided at the inner end of the water injection port 12. The water injection pipe 15 is provided. The water injection pipe 5 passes through the finger ring 10 and one end is connected to the electrode socket. The water injection port 12 is connected and electrically connected to the conductive column screw 8, and the finger ring 10 can drive the water injection pipe 15 to slide axially along the handle 11; the conductive column connecting tube 9 is connected to the handle 11; the conductive column connecting tube 9 is provided with the rotating sleeve 7 at the end away from the finger ring 10, and the rotating sleeve 7 is connected to the locking sleeve 6; the sheath 3 is connected to the handle 11 through the locking sleeve 6, and a traction wire 4 is provided inside the sheath 3; a connecting piece 14 is provided inside the front end of the sheath 3, and the blade 2 is connected to the traction wire 4 through the connecting piece 14, and an insulating piece 13 is provided at the front end of the sheath 3. The blade head 2 is one of an I-type blade head, an O-type blade head, a T-type blade head and an L-type blade head. The I-type blade head is shaped like a capital letter I; the O-type blade head has an insulating head, which looks like the letter O from the top, and the material of the insulating head is aluminum oxide; the T-type blade head is shaped like a capital letter T; the L-type blade head is shaped like an inverted letter L; when in use, always ensure that the blade head and the tissue to be cut are within the endoscope field of view. Otherwise, perforation, bleeding, or mucosal damage may occur. If bleeding occurs during stripping, stop stripping and use appropriate hemostasis methods to stop bleeding. Continue stripping after confirming that the endoscopic field of view is clear. If stripping is performed when the endoscopic field of view is full of blood, perforation, bleeding or mucosal damage may occur. The end of the sheath 3 close to the locking sleeve 6 is provided with a sheath tube 5, and the sheath tube 5 is made of high-density polyethylene material. The outer diameter of the sheath 3 is 2.4 mm, and the sheath 3 is made of polytetrafluoroethylene. The traction wire 4 is one of stainless steel or nickel-titanium alloy.

[0022] A method for using a water-injected mucosal knife, wherein: (1) First, check whether the sterilized packaging is damaged, contaminated, or soaked in water before use, and whether the seal is intact. Check the appearance to see if there are any damage, breaks, bends, or kinks. Check whether the blade model is consistent with the label, whether the blade is cracked or otherwise damaged, and whether the blade body is bent or otherwise deformed. Check whether the parts on the instrument are loose or separated; push and pull the finger ring to see if the blade can be flexibly extended and retracted; check whether the entire instrument can be flexibly extended and retracted in a circle (the diameter of the circle is about 20 cm); check the flushing function, use a syringe to inject sterile water or distilled water into the flushing port, and visually check whether the cutting knife tip can discharge water normally; (2) Preoperative endoscopy and endoscopic ultrasound to determine the location, extent, and depth of lesion invasion; (3) When the target tissue is clearly visible in the endoscopic field of view, pull the finger ring to completely retract the blade head into the sheath and hold the finger ring firmly. While confirming the endoscopic image, carefully insert the sheath into the working channel of the endoscope until the front end of the insertion part protrudes from the endoscope. (4) After the tip of the sheath enters the field of view, stop inserting the instrument and push the finger ring distally to allow the blade to extend from the tip of the sheath. Confirm that the blade and the tip of the sheath are within the field of view of the endoscope (the metal part of the end of the endoscope lens is not in contact with the blade), and that there is no mucus around the blade and the end of the endoscope lens. (5) Adjust the direction of the blade according to the target area, step on the foot switch to turn on the power. The power will only be turned on when the foot switch is pressed. Operate the blade while the power is on to cut, remove and peel the tissue. Do not turn on the power when the blade body contacts the tissue that you do not want to cut. When using the water injection function to cut the knife, you can use a syringe to inject sterile water or distilled water into the water injection port while cutting, removing and peeling the tissue; (6) After tissue cutting is completed, turn off the high-frequency power supply, confirm that the blade head is not adhered to the tissue, pull the finger ring to put the blade head into the sheath, and carefully remove it from the endoscope.

[0023] The design of the water-injected mucosal knife in the present invention can simultaneously realize the stripping or water injection before and during the endoscopic mucosal stripping operation, reducing the time for replacing surgical instruments, saving the doctor's operating time, making the operation safer, and has a simple structure and is easy to operate.

[0024] The above are only preferred embodiments of the present invention. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These should also be regarded as the protection scope of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

Claims

1. A water-injected mucosal knife, characterized in that: The invention comprises a blade head (2), a sheath (3), a traction wire (4), a locking sleeve (6), a rotating sleeve (7), a conductive column screw (8), a conductive column connecting tube (9), a finger ring (10) and a handle (11); the handle (11) is slidably connected to the finger ring (10); an electrode socket is provided on the finger ring (10); the conductive column screw (8) is arranged at the position of the electrode socket; a water injection port (12) is provided at one end of the finger ring (10) opposite to the electrode socket; a water injection pipe (15) is provided at one end of the water injection port (12) located inside; the water injection pipe (5) passes through the finger ring (10); one end of the water injection pipe (5) is connected to the water injection port (12) and is connected to the conductive column The finger ring (10) is electrically connected to the handle (11) by a screw (8); the finger ring (10) can drive the water injection pipe (15) to slide axially along the handle (11); the conductive column connecting tube (9) is connected to the handle (11); the end of the conductive column connecting tube (9) away from the finger ring (10) is provided with the rotating sleeve (7), and the rotating sleeve (7) is connected with a locking sleeve (6); the sheath (3) is connected to the handle (11) through the locking sleeve (6), and a traction wire (4) is provided inside the sheath (3); a connecting piece (14) is provided inside the front end of the sheath (3), and the blade head (2) is connected to the traction wire (4) through the connecting piece (14), and an insulating piece (13) is provided at the front end of the sheath (3).

2. The water-injected mucosal knife according to claim 1, characterized in that: The cutter head (2) is one of an I-shaped cutter head, an O-shaped cutter head, a T-shaped cutter head and an L-shaped cutter head.

3. The water-injected mucosal knife according to claim 2, characterized in that: An insulating head (1) is provided at the front end of the O-shaped blade head.

4. The water-injected mucosal knife according to claim 1, characterized in that: A sheath tube (5) is provided at one end of the tube sheath (3) close to the locking sleeve (6), and the sheath tube (5) is made of high-density polyethylene material.

5. The water-injected mucosal knife according to claim 1, characterized in that: The outer diameter of the tube sheath (3) is 2.4 mm, and the tube sheath (3) is made of polytetrafluoroethylene material.

6. The water-injected mucosal knife according to claim 1, characterized in that: The traction wire (4) is made of either stainless steel or nickel-titanium alloy.

7. A method for using the water-injected mucosal knife according to claim 1, characterized in that: (1) First, check whether the sterilized packaging is damaged, contaminated, or soaked in water before use, and whether the seal is intact. Check the appearance to see if there are any damage, breaks, bends, or kinks. Check whether the blade model is consistent with the label, whether the blade is cracked or otherwise damaged, and whether the blade body is bent or otherwise deformed. Check whether the parts on the instrument are loose or separated. Push and pull the finger ring to see if the blade can be flexibly extended and retracted. Check whether the entire instrument can be flexibly extended and retracted in a circle. Check the flushing function, inject sterile water or distilled water into the flushing port with a syringe, and visually check whether the cutting blade can discharge water normally. (2) Preoperative endoscopy and endoscopic ultrasound to determine the location, extent, and depth of lesion invasion; (3) When the target tissue is clearly visible in the endoscopic field of view, pull the finger ring to completely retract the blade head into the sheath and hold the finger ring firmly. While confirming the endoscopic image, carefully insert the sheath into the working channel of the endoscope until the front end of the insertion part protrudes from the endoscope. (4) After the tip of the sheath enters the field of view, stop inserting the instrument and push the finger ring distally to allow the blade to extend from the tip of the sheath. Confirm that the blade and the tip of the sheath are within the field of view of the endoscope (the metal part of the end of the endoscope lens is not in contact with the blade), and that there is no mucus around the blade and the end of the endoscope lens. (5) Adjust the direction of the blade according to the target area, step on the foot switch to turn on the power. The power will only be turned on when the foot switch is pressed. Operate the blade while the power is on to cut, remove and peel the tissue. Do not turn on the power when the blade body contacts the tissue that you do not want to cut. When using the water injection function to cut the knife, you can use a syringe to inject sterile water or distilled water into the water injection port while cutting, removing and peeling the tissue; (6) After tissue cutting is completed, turn off the high-frequency power supply, confirm that the blade head is not adhered to the tissue, pull the finger ring to put the blade head into the sheath, and carefully remove it from the endoscope.

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