CN210056209U

CN210056209U - Multifunctional incision knife

Info

Publication number: CN210056209U
Application number: CN201920326296.4U
Authority: CN
Inventors: 伏亦伟; 杨斌; 成敏; 翟恒勇; 徐智颖; 陈祝勇
Original assignee: Jiangsu Weidekang Medical Science & Technology Co Ltd
Current assignee: Taizhou Peoples Hospital
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2020-02-14
Anticipated expiration: 2029-03-14

Abstract

The utility model discloses a multifunctional incision knife, including electrically conductive notes liquid tool bit, snare, cable, outer tube assembly and be equipped with sliding ring and electrode plug's core bar. The electrically conductive liquid injection tool bit axial is equipped with the through-hole, the electrically injected liquid tool bit, the snare, the cable from a left side right side connects gradually the setting, the cable locate the outer tube subassembly inside and with electrode plug electric connection, the cable can be drawn by the sliding ring and drive the snare and electrically conduct the liquid injection tool bit along outer tube subassembly axial displacement, the snare can be packed into inside the outer tube subassembly, electrically conduct annotate inside the liquid tool bit afterbody can insert the thimble subassembly and radially spacing by the thimble subassembly, electrically conduct and be equipped with the insulating layer between liquid tool bit and the thimble. The outer tube subassembly is equipped with annotates the liquid mouth, and annotates the through-hole intercommunication that the liquid mouth passes through the gap between cable and the outer tube subassembly and electrically conducts the notes liquid tool bit. The utility model discloses a mucosa peels off under the scope before the operation and in the operation strip off and the water injection of tissue, can constantly fill the moisture that runs off at the operation in-process, combines the snare to reduce surgical instruments's change simultaneously.

Description

Multifunctional incision knife

Technical Field

The utility model belongs to an operation incision sword belongs to medical machine technical field.

Background

The mucosa dissection under the endoscope is a new treatment means appearing in recent years, is also a technology with good clinical application prospect, enables more early digestive tract cancers to be completely excised at one time under the endoscope, avoids the pain of an open operation and the excision of organs, and is an important surgical instrument of the mucosa dissection under the endoscope. Common cutting knives for stripping early cancers in the market include needle knives, IT knives (with ceramic heads), hook knives, triangular knives, Flush knives (with flushing holes in the knife head), woodpecker knives and the like.

As an important means in the treatment of digestive tract lesions, in order to prevent perforation caused in the operation process when a doctor performs mucosa dissection under an endoscope, a mucosa incision knife is often adopted to mark a lesion part, then an injection needle is replaced to inject physiological saline under the mucosa to lift the position of the lesion, and then the mucosa incision knife is replaced to dissect the lesion. Therefore, during the operation, the doctor can frequently change the surgical instruments to meet different requirements of each operation. However, frequent surgical instrument replacement is cumbersome and time-consuming, is not beneficial to the operation of a patient, and the injected saline during the operation runs off along with the operation time, and the process of re-injecting the saline wastes a lot of time, thereby increasing the risk of perforation during the operation and prolonging the operation time due to the fact that the loss of the saline during the operation cannot be timely supplemented.

At present, a patent discloses a combined electrotome, wherein a scalpel head part comprises at least two or more than two scalpel heads which can move or rotate relatively, and a doctor can select a proper electrotome type for the tissue of a focus part according to different states of the proper electrotome for analyzing and judging the condition of the tissue of the focus part, so that the operation is safe and quick; also, a patent discloses a multifunctional knife combining an IT knife, a needle knife and water spraying, which has the functions of the IT knife, the needle knife and the water spraying, wherein the sprayed liquid can wash bleeding spots, improve the visual field of an endoscope and wash burnt tissues adhered to an electrode; still another patent discloses an integrated solution, which combines the functions of a mucosa incision knife and an injection needle, reduces the time for replacing surgical instruments, saves the operation energy of doctors,

this need for a multi-functional combination incision knife saves time in changing the instrument. The two patents can realize that doctors can conveniently select different electrotome heads without replacing the electrotome, or realize the water spraying function to improve the inner diameter visual field, or reduce the time for replacing instruments during marking, injection and stripping, but the whole operation process is still longer.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the to-be-solved technical problem of the utility model is that: the utility model provides an integrate thulium sword, water injection, snare function integral type mucous membrane incision sword can effectively avoid perforating and improve operation efficiency in the mucous membrane peels off the operation under the endoscope, solves the problem that proposes in the above background art.

The utility model discloses the technical scheme who adopts does: a multi-function incision knife comprising:

the electrically conductive liquid tool bit that annotates, the electrically conductive liquid tool bit that annotates has seted up axial through hole.

The electrode plug and the slip ring are arranged on the core rod in a sliding mode.

The ring sleeve can conduct electricity, and the left end of the ring sleeve is inserted into the axial through hole of the electric liquid injection cutter head and is fixedly connected with the electric liquid injection cutter head.

The insulating outer pipe is provided with a liquid injection port or the right end of the insulating outer pipe is connected with a liquid injection three-way pipe.

The pull cable penetrates through the insulating outer tube, the left end of the pull cable is fixedly connected with the ring, the right end of the pull cable is fixedly connected with the sliding ring, the pull cable is used for pulling or pushing the ring, the ring can be pulled to enable the tail of the conductive liquid injection tool bit to enter the insulating outer tube, the tail of the conductive liquid injection tool bit is matched with the left end of the insulating outer tube, and an insulating layer is arranged between matching surfaces of the conductive liquid injection tool bit and the insulating outer tube. The liquid injected into the insulating outer tube can flow out of the conductive liquid injection cutter head through the axial through hole of the conductive liquid injection cutter head. The conductive liquid injection cutter head and the snare are electrically connected with the electrode plug through a pull rope.

Further optimization, the head of the conductive liquid injection tool bit is a thulium tool, an annular boss is arranged on the outer side of the tail of the conductive liquid injection tool bit, and the insulating layer is coated on the outer surface of the annular boss through thermal shrinkage. The through-hole of electrically conductive notes liquid tool bit is the step hole, including the macropore that is located annular boss and the aperture that is located thulium sword, the left end of snare inserts the macropore in and spacing by the fixed pin, the fixed pin both ends are connected with the macropore lateral wall. When the inhaul cable moves rightwards, the ring sleeve is driven to move rightwards and retracts into the insulating outer tube, in the process, the ring sleeve applies right pulling force to the fixing pin, the conductive liquid injection cutter head is driven to move rightwards, the heat-shrinkable annular boss with the insulating layer is inserted into the insulating outer tube, the insulating layer is in close contact with the insulating outer tube, the annular boss is firmly inserted into the insulating outer tube, and therefore the conductive liquid injection cutter head can be effectively prevented from shaking in the insulating outer tube along the radial direction when the conductive liquid injection cutter head is used for cutting or injecting liquid.

In order to prevent the conductive liquid injection cutter head from entering the insulating outer tube too much (namely, the cutter head part is retracted into the insulating outer tube) to influence the operation, the outer side of the left end of the annular boss is provided with a first annular flange, and the outer diameter of the first annular flange is larger than the inner diameter of the insulating outer tube. The other optimization mode is as follows: the inside fixed mounting of the left end of insulating outer tube has spacing pipe, spacing distance between the left end face of spacing pipe and the left end face of insulating outer tube, and spaced distance is less than the length of electrically conductive notes liquid tool bit along axial direction, and the internal diameter of spacing pipe is less than the external diameter of annular boss.

Further optimized, the right end of the insulating outer pipe is connected with the left end outlet of the liquid injection three-way pipe through an outer pipe fixing piece. The outer tube fixing piece is a tubular connecting piece, the inner diameter of the outer tube fixing piece is larger than the outer diameter of the inhaul cable, the outer side wall of the left end of the outer tube fixing piece is provided with inverted teeth inclining to the right, and the outer side wall of the right end of the outer tube fixing piece is provided with external threads.

An annular limiting surface is further arranged between the inverted teeth and the threads, the right end of the insulating outer tube is sleeved at the left end of the outer tube fixing piece, a blind hole used for the inverted teeth to slide in and limit is formed in the part, matched with the inverted teeth, of the inner side wall of the insulating outer tube, and the right end of the insulating outer tube is limited by the annular limiting surface of the outer tube fixing piece. The left end outlet of the liquid injection three-way pipe is sleeved at the right end of the outer pipe fixing piece, and the inner side wall of the liquid injection three-way pipe is provided with an internal thread matched with the external thread. The outer tube fixing piece is internally provided with a through hole penetrating through the left end face and the right end face of the outer tube fixing piece, and the inner diameter of the through hole is larger than the outer diameter of the inhaul cable. Can realize through this portion optimization that outer tube mounting and insulating outer tube and annotate the dismantlement of liquid three-way pipe are connected, and then be convenient for wash and replace. During the installation, can establish insulating outer tube cover in outer tube mounting left end, when the spacing face butt on insulating outer tube right-hand member face and the outer tube mounting, rotatory insulating outer tube or outer tube mounting make the pawl on the outer tube mounting get into the blind hole, through the insulating outer tube and outer tube mounting fixed connection that the blind hole made the spacing effect of pawl in the axial. When the outer tube fixing piece is disassembled, the insulating outer tube and the outer tube fixing piece can rotate relatively again, the inverted teeth slide out of the blind holes, the axial limiting effect of the blind holes on the inverted teeth is further eliminated, and the outer tube fixing piece are disassembled.

Further optimized, the liquid injection three-way pipe is further wrapped by a protection pipe, the left end of the protection pipe is sleeved outside the insulating outer pipe, and the right end of the protection pipe is tightly sleeved at the left end of the liquid injection three-way pipe. The protective tube can avoid the weeping on the one hand, and on the other hand also can prevent that insulating outer tube from taking place to rotate in the use and withdrawing outer tube mounting, and then breaks away from and annotate the liquid three-way pipe. In order to guarantee the fastness of connection of protective tube and notes liquid three-way pipe, further optimize, the left end lateral wall of annotating the liquid three-way pipe is equipped with second annular flange, the protective tube is the elasticity pipe, and its right-hand member crosses second annular flange and closely laminates with notes liquid three-way pipe lateral wall on second annular flange right side.

Further optimized, the inner side wall of the outlet at the right end of the liquid injection three-way pipe is provided with 1 annular step surface, the aperture of the right side hole of the step surface is larger than that of the left side hole of the step surface, and the inner side wall of the right side hole is provided with an internal thread. Be equipped with the annular seal who is used for preventing liquid from annotating the outflow of liquid three-way pipe's right-hand member export on annular step face, the sealing washer right side is equipped with annular retaining member, retaining member left end face and sealing washer right-hand member face butt are equipped with on its lateral wall with the internal thread matched with external screw thread on the inside wall of right-hand member hole.

Preferably, the left end of the core rod is axially provided with a core rod hole, the right end of the core rod is provided with a sliding groove, and the core rod hole is communicated with the sliding groove. . The slip ring is provided with a slip ring hole, a fixed seat is arranged in the slip ring hole, an electrode jack is arranged in the fixed seat, and a screw is arranged in the electrode jack and is in threaded connection with the electrode jack. Two through holes are formed in the side wall of the bottom of the electrode jack, and the two through holes are arranged oppositely and are coaxial with the core rod hole. The left end of the core rod is connected with the outlet of the right end of the liquid injection three-way pipe, the outer side of the right end of the inhaul cable is sleeved with a boosting pipe, and the boosting pipe and the inhaul cable sequentially penetrate through the sealing ring, the core rod hole in the core rod and the through hole in the fixed seat from left to right. The boosting tube and the inhaul cable are locked and fixed in the fixed seat through screws arranged in the electrode jack. When the electrode plug is used, the electrode plug is inserted into the electrode jack, and electricity can sequentially pass through the fixing seat, the screw, the boosting tube, the inhaul cable, the ring sleeve and the conductive liquid injection tool bit.

When the multifunctional incision knife is used, firstly, the head of the multifunctional incision knife can be folded, and the focus part is marked; then, under the states of furling and electrifying the electrode, liquid is injected through the injection port of the injection tee joint, flows to the conductive injection cutter head through the gap between the inner cavity of the insulating outer tube and the inhaul cable, and is injected and raised to the focus part through the through hole of the conductive injection cutter head after passing through the gap between the snare and the conductive injection cutter head; then, under the state of folding and electrifying the electrode, cutting the edge of the focus part by adopting the cutter head part; finally, after the edge is cut, the snare can be pushed out by pushing the sliding ring, the focus part is sleeved, and the mucosa is cut off by electrifying, so that the mucosa is quickly peeled.

The utility model discloses the technological effect who gains does: the utility model discloses a for electrically conducting annotate liquid tool bit, water injection, snare integral type mucous membrane incision sword, the mucosa under the scope has been realized and the water injection of peeling off of tissue before and in the operation, can constantly fill the moisture that runs off at the operation in-process, avoid causing the tissue overcut and the fenestrate condition because of moisture runs off, the mode that combines the snare simultaneously realizes the function that focus position mucous membrane peeled off fast, the time of surgical instruments change has been reduced, save doctor's operation energy and time, it is more high-efficient safer to make the operation.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural view of a multifunctional incision knife in embodiment 1 of the present invention.

Fig. 2 is an enlarged sectional view taken along a-a in fig. 1.

Fig. 3 is an enlarged sectional view of B in fig. 1.

Fig. 4 is a schematic structural view of the outer tube fixing member.

Fig. 5 is an enlarged sectional view of C in fig. 1.

Fig. 6 is a schematic view of an open state of the multi-functional incision knife in embodiment 1 of the present invention.

Fig. 7 is a schematic view of the multifunctional incision knife in the embodiment 1 of the present invention in a closed state.

Fig. 8 is another schematic structural diagram of the conductive liquid injection tool bit and the insulating outer tube of the present invention.

Fig. 9 is a schematic structural view of the conductive liquid injection cutter head, the snare and the insulating outer tube in the folded state of the multifunctional incision knife in fig. 8.

Fig. 10 is another schematic structural diagram of the fixing base, the electrode plug and the core rod of the present invention.

In the figure: 1. the electric liquid injection device comprises a conductive liquid injection cutter head, 101, a thulium cutter, 102, an annular boss, 103, a first annular flange, 2, a ring sleeve, 3, a pull rope, 4, an insulating layer, 5, an insulating outer pipe, 6, a liquid injection three-way pipe, 601, a second annular flange, 602, a liquid inlet, 7, a fixing pin, 8, a limiting pipe, 9, an outer pipe fixing piece, 901, inverted teeth, 902, an external thread, 903, an annular limiting surface, 10, a protective pipe, 11, a sealing ring, 12, a locking piece, 13, a sliding ring, 14, a core rod, 15, a boosting pipe, 16, a fixing seat, 17, a screw, 18, an electrode plug and 19, and an abutting pipe.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention only in a schematic way, and thus show only the components that are relevant to the invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

Referring to fig. 1 to 5, the multifunctional incision knife of the embodiment comprises a conductive liquid injection knife head 1, a ring 2, a pull cable 3, an outer tube assembly and a core bar connected with the right end of the outer tube assembly, wherein the ring 2 and the pull cable 3 can conduct electricity. The conductive liquid injection cutter head 1 is provided with a through hole used as a liquid injection channel along the axial direction, and the core bar 14 is provided with an electrode plug 18 and a slip ring 13 arranged on the core bar in a sliding way. The left end of the snare is connected with the tail of the conductive liquid injection cutter head, and the right end of the snare extends into the outer tube assembly and is connected with the left end of the inhaul cable through a conductive butt joint tube 19. The right-hand member of cable 3 is worn out and is connected with electrode plug electric connection from outer tube assembly is inside, cable 3 can be drawn by sliding ring 13 and drive snare 2 and electrically conductive notes liquid tool bit 1 along axial displacement in outer tube assembly, and snare 2 can be taken into outer tube assembly when moving right inside, and when snare income outer tube assembly was inside, the electrically conductive notes liquid tool bit afterbody inserted the thimble assembly and radially spacing by the thimble assembly, and electrically conductive notes is equipped with insulating layer 4 between liquid tool bit 1 and the thimble assembly contact surface. Specifically, the outer tube assembly comprises an insulating outer tube 5 and an injection three-way tube 6, the left end of the insulating outer tube 5 is the left end of the outer tube assembly, the right end of the insulating outer tube 5 is connected with the left end outlet of the injection three-way tube 6, the right end outlet of the injection three-way tube 6 is connected with the core rod, and the liquid inlet 602 of the injection three-way tube is the liquid injection port of the outer tube assembly. The liquid injected into the insulating outer tube 5 can flow out of the conductive liquid injection cutter head through the axial through hole of the conductive liquid injection cutter head 1.

The head of electrically conductive notes liquid tool bit is thulium sword 101, and the afterbody outside is equipped with annular boss 102, insulating layer 4 passes through the pyrocondensation cladding at annular boss 102's surface. The electrically conductive through-hole of annotating liquid tool bit 1 is as annotating the liquid passageway, and for the step hole, including the macropore that is located the annular boss and the aperture that is located thulium sword, the left end of snare inserts in the macropore and spacing by fixed pin 7, the both ends and the macropore lateral wall of fixed pin 7 are connected, and specific macropore lateral wall is equipped with two through-holes relatively, and fixed pin 7 inserts in the through-hole and its both ends are located two through-holes respectively, and spacing by the through-hole axial.

And a limiting pipe 8 is arranged in the left end of the insulating outer pipe, and the inner diameter of the limiting pipe 8 is smaller than the outer diameter of the annular boss. The outer side wall of the limiting pipe 8 is fixedly arranged on the inner side wall of the insulating outer pipe (the two can be connected by bonding, screw thread or by inverted teeth). The spacing distance between the left end face of the limiting pipe 8 and the left end face of the insulating outer pipe 5 is smaller than the length of the conductive liquid injection cutter head in the axial direction.

The right-hand member of insulating outer tube 5 passes through outer tube mounting 9 and is connected with the left end export of annotating liquid three-way pipe 6, and outer tube mounting 9 is greater than the cable external diameter (cable cross-section circle diameter) for tubulose connecting piece and its internal diameter, and the left end lateral wall of outer tube mounting 9 is equipped with two one-way pawl 901 to the right-hand slope along the axial, and every row of pawl has two and centers on circumferencial direction evenly distributed, and the right-hand member lateral wall of outer tube mounting 9 is equipped with external screw thread 902. An annular limiting surface 903 is further arranged between the inverted teeth and the external threads, the annular limiting surface 903 inclines towards the upper right and is integrally tapered, and an inclined surface matched with the annular limiting surface is arranged on the inner side wall of the right end of the insulating outer tube 5. The right end of the insulating outer tube 5 is sleeved at the left end of the outer tube fixing piece 9, a blind hole for the inverted tooth to be buckled in and limited is formed in the part, matched with the one-way inverted tooth 901, of the inner side wall of the insulating outer tube, and the right end face of the insulating outer tube is limited by the annular limiting face of the outer tube fixing piece. The left end outlet of the liquid injection three-way pipe 6 is sleeved at the right end of the outer pipe fixing piece, and the inner side wall of the liquid injection three-way pipe is provided with an internal thread matched with the external thread. During the installation, can establish insulating outer tube cover in outer tube mounting left end, when the spacing face right-hand member butt on insulating outer tube right-hand member and the outer tube mounting, rotatory insulating outer tube or outer tube mounting make the pawl on the outer tube mounting get into the blind hole, through blind hole to the insulating outer tube and outer tube mounting fixed connection that the spacing effect of pawl in the axial makes. When the outer tube fixing piece is disassembled, the insulating outer tube and the outer tube fixing piece can rotate relatively again, the inverted teeth slide out of the blind holes, the axial limiting effect of the blind holes on the inverted teeth is further eliminated, and the outer tube fixing piece are disassembled.

The outer pipe assembly further comprises a protective pipe 10, the left end of the protective pipe 10 is sleeved outside the insulating outer pipe, and the right end of the protective pipe is tightly sleeved at the left end of the liquid injection three-way pipe.

The left end lateral wall of annotating the liquid three-way pipe is equipped with second annular flange 601, the protective tube is the elasticity pipe, and its left end is crossed second annular flange 601 and is closely laminated with the liquid three-way pipe lateral wall of annotating on second annular flange right side.

The inner side wall of the outlet at the right end of the liquid injection three-way pipe 6 is provided with 1 annular step surface, the aperture of a right side hole of the step surface is larger than that of a left side hole of the step surface, and the inner side wall of the right side hole is provided with internal threads; be equipped with on annular step face and be used for preventing the annular seal circle 11 that liquid flows from annotating the right-hand member export of liquid three-way pipe, the right side of sealing washer 11 is equipped with annular retaining member 12, retaining member left end face and sealing washer right-hand member face butt are equipped with the external screw thread with internal thread matched with on the inside wall of right-hand member hole on its lateral wall.

The left end of the core rod is provided with a core rod hole along the axial direction, the right end of the core rod is provided with a sliding groove, and the core rod hole is communicated with the sliding groove. And a slip ring hole is formed in the slip ring 13, a fixed seat 16 is arranged in the slip ring hole, an electrode jack is arranged in the fixed seat, a screw 17 is arranged in the electrode jack, and the screw 17 is in threaded connection with the electrode jack. And 2 through holes are formed in the side wall of the bottom of the electrode jack and are oppositely arranged and coaxial with the core rod hole. The left end of the core rod 14 is connected with the outlet of the right end of the liquid injection three-way pipe 6, the outer side of the right end of the inhaul cable 3 is sleeved with a boosting pipe 15, and the boosting pipe and the inhaul cable sequentially penetrate through the sealing ring 11, the core rod hole in the core rod 14 and the through hole in the fixing seat 16 from left to right. The boosting tube 15 and the inhaul cable 3 are locked and fixed in the fixed seat through a screw 17 arranged in the electrode jack. When the electrode plug is used, the electrode plug 18 is inserted into the electrode jack, and electricity can sequentially pass through the fixing seat, the screw, the boosting pipe, the pull rope, the ring sleeve and the conductive liquid injection cutter head through the electrode plug 18.

When the multifunctional incision knife is used, firstly, the head of the multifunctional incision knife can be folded (the folding means that the sliding ring is moved rightwards to pull the pull rope, so that the ring is sleeved in the insulating outer tube, the tail of the conductive liquid injection knife head is inserted into the insulating outer tube and limited by the insulating outer tube, the head of the conductive liquid injection knife head is still positioned outside the insulating outer tube, and the state is the folding state of the multifunctional incision knife, and is shown in a figure 7), and a focus part is marked; then, under the states of furling and electrifying the electrode, liquid is injected through the injection port of the injection tee joint, flows to the conductive injection cutter head through the gap between the inner cavity of the insulating outer tube and the inhaul cable, and is injected and raised to the focus part through the through hole of the conductive injection cutter head after passing through the gap between the snare and the conductive injection cutter head; then, under the state of folding and electrifying the electrode, cutting the edge of the focus part by adopting the cutter head part; finally, after the edge is cut, the multifunctional incision knife can be pushed out by pushing the sliding ring to enable the multifunctional incision knife to be in an open state (see fig. 6), and the focus part is sleeved and cut by electrifying, so that the mucosa is quickly peeled.

See fig. 8 and fig. 9, is another kind of structure schematic diagram of the utility model discloses annotate liquid tool bit and insulating outer tube electrically, wherein the left end outside of the annular boss of annotating the liquid tool bit electrically is equipped with first annular flange 103, the external diameter of first annular flange is greater than insulating outer tube internal diameter. Through the limiting effect of the first annular flange, the phenomenon that the conductive liquid injection cutter head excessively enters the insulating outer tube is avoided. The inner side wall of the insulating outer tube in the embodiment is not provided with the limiting tube 8.

Fig. 10 is another schematic structural diagram of the fixing base 16, the electrode plug 18, the cable 3, the slip ring 13 and the core rod 14. Wherein the fixed seat 16 is fixedly sleeved on the outer side of the left end of the core rod 14, an electrode jack is arranged on the fixed seat, a stud 17 is arranged in the electrode jack, and the stud 17 is in threaded connection with the electrode jack. And 2 through holes are formed in the side wall of the bottom of the electrode jack and are oppositely arranged and coaxial with the core rod hole. The left end of the core rod 14 is connected with the outlet of the right end of the liquid injection three-way pipe 6, the right end of the inhaul cable 3 penetrates through a through hole in the fixed seat 16, extends to the sliding ring 13 rightwards and is fixedly connected with the sliding ring, the inhaul cable 3 is in contact with the outer wall of the inhaul cable 3 through the bottom of a stud 17 arranged in the electrode jack, when the liquid injection three-way pipe is used, the electrode plug 18 is inserted into the electrode jack, and electricity can sequentially pass through the fixed seat, the stud, the inhaul cable, the.

The liquid injection port in the above embodiment may be directly provided on the insulating outer tube 5, and the liquid injection tube may be inserted into the liquid injection port, and the liquid injection three-way tube 16 is replaced by a connection tube, and the structure of the outlets at the left and right ends of the connection tube is the same as the structure of the outlets at the left and right ends of the liquid injection three-way tube 16. The materials of the ring sleeve 2, the inhaul cable 3, the fixing pin 7, the limiting pipe 8, the outer pipe fixing piece 9, the locking piece 12, the boosting pipe 15, the fixing seat 16 and the butt joint pipe 19 are all metal pieces meeting the conventional requirements of medical treatment, sanitation and the like, and the materials of the insulating layer 4, the insulating outer pipe 5, the liquid injection three-way pipe 6, the protective pipe 10, the sealing ring 11, the sliding ring 13 and the core rod 14 are all polymer materials meeting the conventional requirements of medical treatment, sanitation and the like.

The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the concept of the present invention within the technical scope disclosed in the present invention.

Claims

1. A multifunctional incision knife is characterized in that:

the conductive liquid injection cutter head comprises a conductive liquid injection cutter head (1), wherein an axial through hole is formed in the conductive liquid injection cutter head (1);

the device comprises a core bar (14), wherein an electrode plug (18) and a sliding ring (13) which is arranged on the core bar in a sliding manner are arranged on the core bar (14);

the left end of the ring sleeve (2) is inserted into the axial through hole of the conductive liquid injection tool bit (1) and is fixedly connected with the conductive liquid injection tool bit (1);

the insulating outer pipe (5) is provided with a liquid injection port or the right end of the insulating outer pipe (5) is connected with a liquid injection three-way pipe (6);

the cable (3) penetrates through the insulating outer tube, the left end of the cable (3) is fixedly connected with the ring sleeve (2), the right end of the cable (3) is fixedly connected with the sliding ring (13), the cable (3) is used for pulling or pushing the ring sleeve (2), the cable (3) can pull the ring sleeve (2) to enable the tail of the conductive liquid injection tool bit to enter the insulating outer tube (5), the tail of the conductive liquid injection tool bit (1) is matched with the left end of the insulating outer tube (5), and an insulating layer (4) is arranged between matching surfaces of the conductive liquid injection tool bit and the insulating outer tube; liquid injected into the insulating outer pipe (5) can flow out of the conductive liquid injection cutter head through the axial through hole of the conductive liquid injection cutter head (1); the conductive liquid injection cutter head (1) and the snare (2) are electrically connected with the electrode plug (18) through the inhaul cable (3).

2. The multi-functional incision knife of claim 1, wherein: the head of the conductive liquid injection cutter head (1) is a thulium cutter (101), and the outer side of the tail of the conductive liquid injection cutter head is provided with an annular boss (102);

the insulating layer (4) is coated on the outer surface of the annular boss (102) through thermal shrinkage, and the through hole of the conductive liquid injection cutter head (1) is a stepped hole and comprises a large hole in the annular boss (102) and a small hole in the thulium cutter (101);

the left end of the snare (2) is inserted into the large hole and limited by a fixing pin (7), and two ends of the fixing pin (7) are connected with the side wall of the large hole.

3. The multi-functional incision knife of claim 2, wherein: the annular boss (102)

Is provided with a first annular flange (103), and the outer diameter of the first annular flange (103) is larger than the inner diameter of the insulating outer tube (5).

4. The multi-functional incision knife of claim 2, wherein: a limiting pipe (8) is fixedly installed inside the left end of the insulating outer pipe (5), the left end face of the limiting pipe (8) and the left end face of the insulating outer pipe (5) are separated by a distance, and the separated distance is smaller than the length of the conductive liquid injection cutter head in the axial direction; the inner diameter of the limiting pipe (8) is smaller than the outer diameter of the annular boss (102).

5. The multi-functional incision knife of claim 1, wherein: the right end of the insulating outer pipe (5) is connected with the outlet of the left end of the liquid injection three-way pipe (6) through an outer pipe fixing piece (9);

the outer pipe fixing piece (9) is a tubular connecting piece, the inner diameter of the outer pipe fixing piece is larger than the outer diameter of the inhaul cable, the outer side wall of the left end of the outer pipe fixing piece is provided with a right-inclined pawl (901), and the outer side wall of the right end of the outer pipe fixing piece is provided with an external thread (902);

an annular limiting surface (903) is also arranged between the inverted tooth (901) and the external thread (902);

the right end of the insulating outer tube (5) is sleeved at the left end of the outer tube fixing piece (9), a blind hole for sliding in and limiting the inverted tooth (901) is formed in the part, matched with the inverted tooth (901), of the inner side wall of the insulating outer tube (5), and the right end face of the insulating outer tube (5) is limited by an annular limiting face (903) of the outer tube fixing piece (9);

the left end outlet of the liquid injection three-way pipe (6) is sleeved at the right end of the outer pipe fixing piece (9), and the inner side wall of the liquid injection three-way pipe is provided with an internal thread matched with the external thread (902).

6. The multi-functional incision knife of claim 5, wherein: and the liquid injection three-way pipe is further covered with a protection pipe (10), the left end of the protection pipe (10) is sleeved outside the insulating outer pipe (5), and the right end of the protection pipe is tightly sleeved at the left end of the liquid injection three-way pipe (6).

7. The multi-functional incision knife of claim 6, wherein: the outer side wall of the left end of the liquid injection three-way pipe (6) is provided with a second annular flange (601), the protective pipe (10) is an elastic pipe, and the right end of the protective pipe passes through the second annular flange (601) and is tightly attached to the outer side wall of the liquid injection three-way pipe on the right side of the second annular flange (601).

8. The multi-functional incision knife of claim 5, wherein: the injection three-way pipe (6)

The inner side wall of the right-end outlet is provided with 1 annular step surface, the aperture of a right side hole of the annular step surface is larger than that of a left side hole of the annular step surface, and the inner side wall of the right side hole is provided with internal threads; be equipped with on the annular step face and be used for preventing that liquid from annotating annular seal circle (11) that the right-hand member export of liquid three-way pipe (6) flows, the right side of sealing washer (11) is equipped with annular retaining member (12), the right-hand member face butt of the left end face of retaining member (12) and sealing washer (11), be equipped with on the lateral wall of retaining member (12) with right side downthehole screw thread matched with external screw thread.

9. The multi-functional incision knife of claim 5, wherein: the left end of the core rod (14) is axially provided with a core rod hole, the right end of the core rod is provided with a sliding groove, and the core rod hole is communicated with the sliding groove; the slip ring

(13) A slip ring hole is formed in the base, a fixed seat (16) is arranged in the slip ring hole, an electrode jack is arranged in the fixed seat (16), a screw (17) is arranged in the electrode jack, and the screw (17) is in threaded connection with the electrode jack; two through holes are formed in the side wall of the bottom of the electrode jack, and the through holes are arranged oppositely and coaxial with the core rod hole;

the left end of the core rod (14) is connected with the outlet of the right end of the liquid injection three-way pipe (6), the outer side of the right end of the inhaul cable (3) is sleeved with a boosting pipe (15), and the boosting pipe (15) and the inhaul cable (3) sequentially penetrate through the sealing ring (11), a core rod hole in the core rod (14) and a through hole in the fixed seat (16) from left to right; the boosting tube (15) and the inhaul cable (3) are locked and fixed in the fixed seat through a screw (17) arranged in the electrode jack; when the electrode plug is used, the electrode plug (18) is inserted into the electrode jack, and electricity can sequentially pass through the fixing seat, the screw, the boosting tube, the inhaul cable, the ring sleeve and the conductive liquid injection cutter head through the electrode plug (18).