Low-temperature plasma incision knife for mucous membrane tissue under endoscope
By designing a low-temperature plasma cutting tool for endoscopic mucosal tissue, which combines a rhomboid double-edged blade with a ceramic insulating layer, the problems of instrument replacement and thermal damage are solved, enabling rapid marking and low-temperature cutting, and reducing surgical time and smoke generation.
Patent Information
- Application Number
- CN202422277987.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-09-19
AI Technical Summary
Existing endoscopic mucosal tissue cutting tools require instrument replacement, increasing operation time and risks. At the same time, high-frequency current cutting causes thermal damage and generates harmful fumes.
A low-temperature plasma cutting tool for endoscopic mucosal tissue was designed. It uses a rhomboid double-edged blade coated with a ceramic insulating layer. It generates plasma through a high-intensity electric field for low-temperature cutting. Combined with a cylindrical blade for marking, it avoids instrument replacement and thermal damage.
It enables rapid marking and cutting during surgery, reducing surgical time and minimizing thermal damage and harmful fumes.
Smart Images
Figure CN223773845U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to surgical electrode technical field, concretely is a mucous membrane tissue low temperature plasma incision knife under endoscope. BACKGROUND
[0002] Endoscopic submucosal dissection (ESD) is a new treatment method in recent years, and the operation aims at treating mucosal lesions by large resection of part of mucosa (depth can reach submucosal tissue) ; ESD generally adopts submucosal injection resection method, and high osmotic saline or adrenaline saline (1:10000) is injected in submucosal point of lesion base edge by endoscopic injection needle, so that it is separated from submucosal layer and fully raised, and then high-frequency instrument is applied to resect lesion mucosa.
[0003] The operation steps of endoscopic mucosal dissection are marking, incision and mucosal stripping, and in the operation process, marking, incision and mucosal stripping need to be operated according to different operation requirements, some need to use two different endoscopic knife heads to operate respectively, in the operation, marking is carried out first, then another kind of surgical instrument for cutting is replaced to cut mucosal tissue; the time of instrument replacement in the operation is relatively long, this process not only increases the operation time, brings longer pain to the patient and increases the treatment cost due to the use of multiple instruments in the operation, and also increases the operation risk.
[0004] Meanwhile, the existing mucosal tissue incision knife under endoscope adopts the working principle of high-frequency cutting knife, uses the thermal effect of high-frequency current to heat the tissue, makes the tissue protein shrink, curls and denatures to achieve the cutting effect, but when cutting is carried out by using high-frequency current, thermal damage is large due to high cutting temperature, and a large amount of harmful smoke is generated in the cutting process. UTILITY MODEL CONTENTS
[0005] In view of the above problems, the utility model provides a mucosal tissue low temperature plasma incision knife under endoscope for solving the problems of needing to replace electrodes in the operation and generating a large amount of harmful smoke in the cutting process.
[0006] To achieve the above purpose, the utility model adopts the technical scheme that:
[0007] A mucosal tissue low temperature plasma incision knife under endoscope, including working knife head, the working knife head includes first knife head and second knife head, the first knife head is used to mark, the second knife head is used to cut mucosal tissue,
[0008] The second knife head is a rhombic double-edged knife head, the second knife head surface is provided with ceramic insulating coating, and the second knife head blade edge position is not coated with ceramic insulating coating.
[0009] The working tool head is connected with the handle through the flexible pipe group.
[0010] As a further improvement of the above technical solution, the handle comprises a first handle and a second handle, the second handle is sleeved on the first handle, the first tool head is an inner hollow tool head, the first tool head is arranged on an inner hollow tool head pipe, the second tool head is located behind the first tool head, the end of the flexible pipe group is provided with a ceramic insulation sleeve, the second handle is connected with the inner hollow tool head pipe through a connecting mechanism, and the second handle and the connecting mechanism are used for pushing the second tool head out of the ceramic insulation sleeve.
[0011] As a further improvement of the above technical solution, the flexible pipe group comprises a stainless steel flexible pipe, a cladding pipe, an outer pipe and a ceramic insulation sleeve; the inner hollow tool head pipe is slidably arranged in the ceramic insulation sleeve, and the rear end of the inner hollow tool head pipe is connected with the stainless steel flexible pipe; the ceramic insulation sleeve is fixedly connected with the outer pipe, and the stainless steel flexible pipe is wrapped with the cladding pipe at the rear end of the inner hollow tool head pipe; the stainless steel flexible pipe is connected with the second handle, and a stepped hole is arranged in the middle of the ceramic insulation sleeve.
[0012] As a further improvement of the above technical solution, the first tool head is a cylindrical inner hollow tool head, the first tool head is connected with the inner hollow tool head pipe, the inner hollow tool head pipe is connected with the stainless steel flexible pipe, the stainless steel flexible pipe is connected with a liquid injection interface, and the liquid injection interface is arranged on the second handle.
[0013] As a further improvement of the above technical solution, the thickness H of the gap, where the blade edge position of the second tool head is not coated with a ceramic insulation coating, is 15-100 μm.
[0014] As a further improvement of the above technical solution, the outer diameter d of the stainless steel flexible pipe is 0.5-2 mm, and the thickness t is 0.5-1 mm; the stainless steel flexible pipe comprises an operation part and a bending part, and the relationship between the laser cutting spiral pitch P1 of the bending part and the laser cutting spiral pitch P2 of the operation part is P1=(1.5-3)*P2.
[0015] As a further improvement of the above technical solution, the cutting gap of the operation part and the bending part is 0.2-0.5 mm; the cladding pipe is made of a heat-shrinkable material, and the cladding pipe and the stainless steel flexible pipe form an integral whole.
[0016] Compared with the prior art, the utility model has the advantages that: through the arrangement of the two tool heads, the first tool head can be used for quickly marking points when positioning and marking in the operation process, and the second tool head can be used for cutting the mucosa when cutting is needed, so that the operation instrument need not be replaced in the operation process, and the operation time can be effectively shortened.
[0017] The ceramic insulating coating covers other areas of the second cutter head except the cutting edge, and the thickness H of the slit of the cutting edge without the coating is 15-100 μm; the slit of the double cutting edge of the second cutter head can concentrate energy to the slit of the cutter head to form a strong electric field, and the high-strength electric field ionizes the tissue electrolyte molecules in the slit in contact with the tissue to generate plasma; the plasma is generated at the slit where the electrode contacts the tissue, and after energization, the plasma formation area first generates a plasma vapor bubble, and the area of the plasma vapor bubble is the plasma action area; the plasma vapor bubble continues to evaporate and ionize to form plasma acting on the human body, so that the tissue is cut at low temperature (40-100 DEG C) and coagulation, and the thermal damage and the generation of harmful smoke are reduced. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a three-dimensional structure schematic view of the utility model.
[0019] Figure 2 It is a three-dimensional structure schematic view of the utility model cutter head part.
[0020] Figure 3 It is a sectional structure schematic view (cutter head extends) of the utility model.
[0021] Figure 4 It is a sectional structure schematic view (cutter head retracts) of the utility model.
[0022] Figure 5 It is a three-dimensional structure schematic view of the utility model.
[0023] Figure 6 It is a three-dimensional structure schematic view of the utility model. Figure 5 It is a local enlarged structure schematic view of B.
[0024] Figure 7 It is a sectional structure schematic view of the utility model handle.
[0025] Figure 8 It is a sectional structure schematic view of the utility model handle. Figure 7 It is a local enlarged structure schematic view of A.
[0026] In the figure: 1, first handle;2, second handle;21, liquid injection interface;3, electrode connecting seat;4, flexible pipe group;41, outer pipe;42, ceramic insulating sleeve;43, stainless steel flexible pipe;44, cladding pipe;5, working cutter head;51, first cutter head;52, second cutter head;53, inner hollow cutter head pipe;54, stepped hole. DETAILED DESCRIPTION
[0027] In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be described in detail below with reference to the embodiments, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application. Embodiments
[0028] As Figures 1-8 shown, an endoscopic mucosal tissue low-temperature plasma incision knife comprises a working knife head 5, the working knife head 5 comprises a first knife head 51 and a second knife head 52; the first knife head 51 is used for dotting and marking, and the second knife head 52 is used for cutting mucosal tissue; the working knife head 5 is connected with a handle through a flexible pipe group 4; the handle comprises a first handle 1 and a second handle 2, the second handle 2 is slidingly sleeved on the first handle 1, the first knife head 51 is an inner hollow knife head, the first knife head 51 is arranged on an inner hollow knife head pipe 53, the second knife head 52 is located behind the first knife head 51, a ceramic insulation sleeve 42 is arranged at an end of the flexible pipe group 4, the second handle 2 is connected with the inner hollow knife head pipe 53 through a connecting mechanism, and the second handle 2 and the connecting mechanism are used for pushing the second knife head 52 out of the ceramic insulation sleeve 42; the flexible pipe group 4 comprises a stainless steel flexible pipe 43, a cladding pipe 44, an outer pipe 41 and the ceramic insulation sleeve 42; the inner hollow knife head pipe 53 is slidingly arranged in the ceramic insulation sleeve 42, and a rear end of the inner hollow knife head pipe 53 is connected with the stainless steel flexible pipe 43; the ceramic insulation sleeve 42 is fixedly connected with the outer pipe 41, and the rear end of the stainless steel flexible pipe 43 is wrapped with the cladding pipe 44; the stainless steel flexible pipe 43 is connected with the second handle 2, a stepped hole 54 is arranged in the middle of the ceramic insulation sleeve 42, in a non-cutting working state, the knife head is retracted into the stepped hole 54 of the ceramic insulation sleeve 42; the first knife head 51 is a cylindrical inner hollow knife head, high-frequency current can be passed through the cylindrical head to quickly dot and mark; the first knife head 51 is in communication with the inner hollow knife head pipe 53, the inner hollow knife head pipe 53 is in communication with the stainless steel flexible pipe 43, the stainless steel flexible pipe 43 is in communication with a liquid injection interface 21, the liquid injection interface 21 is a liquid injection luer interface, the liquid injection interface 21 is arranged on the second handle 2, and the liquid injection interface 21 can be used for liquid injection for flushing during surgery; in a cutting working state, the stainless steel flexible pipe 43 pushes the inner hollow knife head pipe 53 to move by pushing the second handle 2, and the second knife head 52 is pushed out to the outside of the stepped hole 54 of the ceramic insulation sleeve 42.
[0029] The stainless steel flexible pipe 43 and the inner hollow knife head pipe 53 of the knife head are connected by welding, wherein the other end of the cladding pipe 44 and the stainless steel flexible pipe 43 is fixedly connected with the second handle 2, and the second handle 2 is slidingly arranged on the first handle 1.
[0030] The second knife head 52 is a rhombic double-edged knife head, a ceramic insulation coating is arranged on the surface of the second knife head 52, and the edge position of the second knife head 52 is not coated with the ceramic insulation coating; the slit thickness H of the edge position of the second knife head 52, which is not coated with the ceramic insulation coating, is 15-100 μm.
[0031] The first cutting head is a cylindrical hollow head, and the head is sprayed with a ceramic insulating coating. The second head 52 is a rhombic double-blade head, and a ceramic insulating coating covers the area other than the blade edge, and the thickness H of the slit of the blade edge without the coating is 15-100 μm. The slit of the double-blade edge of the second head 52 can concentrate energy to the slit of the head to form a strong electric field, and the high-strength electric field can ionize the tissue electrolyte molecules in the slit in contact with the tissue to generate plasma. The plasma is generated at the slit where the electrode is in contact with the tissue, and after energization, the plasma formation zone first generates a plasma vapor bubble, and the area of the plasma vapor bubble is the plasma action zone. As shown in the figure, the plasma vapor bubble continues to evaporate and ionize to form plasma acting on the human body, thereby realizing low-temperature cutting (40-100℃) and coagulation of the tissue, reducing thermal damage and reducing the generation of harmful smoke. Figure 3
[0032] The outer diameter d of the stainless steel flexible tube 43 is 0.5 mm-2 mm, and the thickness t is 0.5 mm-1 mm. The stainless steel flexible tube includes an operating part and a curved part, and the relationship between the laser cutting spiral pitch P1 of the curved part and the laser cutting spiral pitch P2 of the operating part is P1=(1.5-3)*P2. The cutting gap of the operating part and the curved part is 0.2 mm-0.5 mm. The covering tube 44 is made of PTFE / PVDF type heat-shrinkable tube, and the outer tube 41 is a plastic tube made of PEEK type material, which can be bent and wound with the stainless steel flexible tube 43. The covering tube 44 is tightly shrunk on the stainless steel flexible tube 43 to form an integral whole, and the covering tube 44 is soft and can operate with the stainless steel flexible tube 43. At the same time, the flexible tube is completely covered to seal the laser cutting gap, and the stainless steel flexible tube 43 can transport gas, liquid, etc.
[0033] The stainless steel flexible tube is obtained by a laser pipe cutting machine according to a specific cutting path. The specific cutting path can reduce the bending radius of the capillary stainless steel tube, improve the passing capacity of the capillary stainless steel tube in the narrow space of the human body blood vessel, esophagus, etc., and has an anti-winding function. The processed stainless steel flexible tube is divided into an operating part and a distal curved part. The laser cutting spiral pitch P1 of the curved part L1 and the laser cutting spiral pitch P1 of the distal curved part L2 are 1.5-3 times P2, and the cutting gap d of the two parts is 0.2 mm-0.5 mm. The cutting curve of different parts is controlled to realize the flexibility control of the flexible tube, and the flexibility of the distal end is better, which is easier to pass through the narrow and curved space of the human body.
[0034] It should be noted that the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0035] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above example is only used to help understand the method and core idea of the present application.
[0036] The above is only the preferred embodiment of the present application, and it should be pointed out that due to the limited expression of the text, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, decorations or changes can be made without departing from the principles of the present application, and the above technical features can also be combined in a proper way; the improvements, decorations, changes or combinations, or the direct application of the concept and technical solution of the present application to other occasions without improvement, should be regarded as the protection scope of the present application.
Claims
1. An endoscopic mucosal tissue cryoplasmon incision knife, characterized by, The utility knife head comprises a first knife head and a second knife head; the first knife head is used for marking, and the second knife head is used for cutting mucosa; The second knife head is a rhombic double-edge knife head, and a ceramic insulation coating is arranged on the surface of the second knife head, and the edge position of the second knife head is not coated with the ceramic insulation coating. The utility knife head is connected with the handle through a flexible pipe group.
2. The cryogenic mucosal tissue incision knife according to claim 1, wherein The handle comprises a first handle and a second handle, the second handle is sleeved on the first handle, the first knife head is a hollow knife head, the first knife head is arranged on a hollow knife head pipe, the second knife head is located behind the first knife head, the end of the flexible pipe group is provided with a ceramic insulation sleeve, the second handle is connected with the hollow knife head pipe through a connecting mechanism, and the second handle and the connecting mechanism are used for pushing the second knife head out of the ceramic insulation sleeve.
3. The cryogenic mucosal tissue incision knife according to claim 2, wherein The flexible pipe group comprises a stainless steel flexible pipe, a cladding pipe, an outer pipe and a ceramic insulation sleeve; the hollow knife head pipe is slidably arranged in the ceramic insulation sleeve, the rear end of the hollow knife head pipe is connected with the stainless steel flexible pipe; the ceramic insulation sleeve is fixedly connected with the outer pipe, the stainless steel flexible pipe and the rear end of the hollow knife head pipe are wrapped with the cladding pipe; the stainless steel flexible pipe is connected with the second handle, and a stepped hole is arranged in the middle of the ceramic insulation sleeve.
4. The cryogenic mucosal incision knife according to claim 3, wherein The first knife head is a cylindrical hollow knife head, the first knife head is connected with the hollow knife head pipe, the hollow knife head pipe is connected with the stainless steel flexible pipe, the stainless steel flexible pipe is connected with a liquid injection interface, and the liquid injection interface is arranged on the second handle.
5. The cryogenic mucosal incision knife according to claim 1, wherein The slit thickness H of the second knife head edge position not coated with the ceramic insulation coating is 15-100 μm.
6. The cryogenic mucosal incision knife according to claim 3, wherein The outer diameter d of the stainless steel flexible pipe is 0.5 mm-2 mm, and the thickness t is 0.5 mm-1 mm; the stainless steel flexible pipe comprises an operation part and a bending part, and the relationship between the laser cutting spiral pitch P1 of the bending part and the laser cutting spiral pitch P2 of the operation part is P1=(1.5-3)*P2.
7. The cryogenic mucosal incision knife according to claim 6, wherein The cutting gap of the operation part and the bending part is 0.2 mm-0.5 mm; the cladding pipe is made of a heat shrink material, and the cladding pipe and the stainless steel flexible pipe form an integral whole.