CN109771027B

CN109771027B - Multifunctional cutting knife

Info

Publication number: CN109771027B
Application number: CN201910192083.1A
Authority: CN
Inventors: 伏亦伟; 杨斌; 成敏; 翟恒勇; 徐智颖; 陈祝勇
Original assignee: Taizhou Peoples Hospital
Current assignee: Taizhou Peoples Hospital
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2024-06-18
Anticipated expiration: 2039-03-14
Also published as: CN109771027A

Abstract

The invention discloses a multifunctional cutting knife which comprises a conductive liquid injection knife head, a snare, a guy cable, an outer tube assembly and a core bar provided with a slip ring and an electrode plug. The electric liquid injection tool bit is provided with a through hole in the axial direction, the electric liquid injection tool bit, the snare and the inhaul cable are sequentially connected from left to right, the inhaul cable is arranged inside the outer tube assembly and is electrically connected with the electrode plug, the inhaul cable can be pulled by the slip ring and drives the snare and the electric liquid injection tool bit to axially move along the outer tube assembly, the snare can be retracted inside the outer tube assembly, the tail part of the electric liquid injection tool bit can be inserted into the sleeve assembly and is radially limited by the sleeve assembly, and an insulating layer is arranged between the electric liquid injection tool bit and the contact surface of the sleeve assembly. The outer tube subassembly is equipped with annotates the liquid mouth, and annotates the liquid mouth and annotate the through-hole intercommunication of liquid tool bit with electrically conductive through the gap between cable and the outer tube subassembly. The invention realizes the stripping and water injection of tissues before and during endoscopic mucosa stripping operation, can continuously fill lost moisture in the operation process, and simultaneously combines the snare to reduce the replacement of surgical instruments.

Description

Multifunctional cutting knife

Technical Field

The invention belongs to an operation incision knife, and belongs to the technical field of medical machinery.

Background

The endoscopic mucosa resection is a new treatment means which appears in recent years and is also a technology with good clinical application prospect, so that more early-stage digestive tract cancers can be completely resected under the endoscope at one time, pain of an open surgery and resection of organs are avoided, and an important surgical instrument of the endoscopic mucosa resection is a mucosa resection knife. The common incisors for early cancer dissection in the market include needle cutters, IT cutters (with ceramic heads), hook cutters, triangular cutters, flush cutters (with flushing holes in the cutter heads), woodpecker cutters, and the like.

As an important means in digestive tract lesion treatment, in order to prevent perforation in the surgical process, doctors often mark the lesion site by adopting a mucous membrane incision knife in the endoscopic mucous membrane dissection process, then replace an injection needle to inject submucosal normal saline to lift the position of the lesion, and then replace the mucous membrane incision knife to strip the lesion. Therefore, doctors frequently replace surgical instruments in the surgical process so as to meet different requirements of various operations. However, frequent replacement of the surgical instruments is cumbersome and time-consuming, which is not beneficial to the operation of the patient, and the physiological saline injected during the operation runs off along with the operation time, so that a great deal of time is wasted in the process of re-injecting the physiological saline, the risk of perforation during the operation and the operation time are increased due to the fact that the physiological saline in the operation runs off and cannot be timely supplemented are increased.

At present, a patent discloses a combined electric knife, wherein a knife head part comprises at least two or more knife heads which can move or rotate relative to each other, and a doctor can analyze and judge the situation of tissue at a focus part according to the situation of using different states of the proper electric knife to select the proper electric knife type for the tissue at the focus part, so that the operation is safe and quick; there are also patents which disclose a multifunctional knife combining an IT knife, a needle knife and water spraying, which has the functions of the IT knife and the needle knife, and also has the water spraying function, and the sprayed liquid can wash bleeding points, improve the field of view of an endoscope, and wash burnt tissues adhered on an electrode; still another patent discloses an integration scheme, which combines the functions of a mucous membrane incision knife and an injection needle, reduces the replacement time of surgical instruments, saves the operation energy of doctors,

This need for a combined cutting blade with multiple functions saves time in changing the instrument. The two patents can realize that doctors can conveniently select different electric knife heads without changing the electric knife, or realize that the water spraying function improves the inner diameter visual field, or realize that the time for changing the instrument during marking, injection and stripping is reduced, but the whole operation process is still longer.

Disclosure of Invention

In order to overcome the defects in the prior art, the technical problems to be solved by the invention are as follows: the utility model provides an integrate thulium sword, water injection, snare function integral type mucous membrane incising knife, can effectively avoid perforation and improve operation efficiency in the operation is peeled off to mucous membrane under the scope, solves the problem that proposes in the above background art.

The technical scheme adopted by the invention is as follows: a multi-functional cutting knife comprising:

the conductive liquid injection tool bit is provided with an axial through hole.

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

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

The insulating outer tube, the right-hand member that has offered notes liquid mouth or insulating outer tube on the insulating outer tube is connected with notes liquid three-way pipe.

The cable is arranged in the insulating outer tube in a penetrating mode, the left end of the cable is fixedly connected with the ring sleeve, the right end of the cable is fixedly connected with the slip ring, the cable is used for pulling or pushing the ring sleeve, the cable can pull the ring sleeve 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 the two matching surfaces. The liquid injected into the insulating outer tube can flow out from the conductive liquid injection tool bit through the axial through hole of the conductive liquid injection tool bit. The conductive liquid injection tool bit and the snare are electrically connected with the electrode plug through a inhaul cable.

Further preferably, 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 heat shrinkage. The through hole of the conductive liquid injection tool bit is a step hole and comprises a large hole positioned in the annular boss and a small hole positioned in the thulium knife, the left end of the snare is inserted into the large hole and limited by a fixing pin, and two ends of the fixing pin are connected with the side wall of the large hole. When the inhaul cable moves rightwards, the ring sleeve is driven to move rightwards and retract into the insulating outer tube, in the process, the ring sleeve exerts rightwards pulling force on the fixing pin, so that the conductive liquid injection tool bit is driven to move rightwards, the annular boss with the insulating layer in thermal shrinkage is inserted into the insulating outer tube, the insulating layer is in close contact with the insulating outer tube, and the annular boss is firmly inserted into the insulating outer tube, so that the conductive liquid injection tool bit can be effectively prevented from shaking along the radial direction in the insulating outer tube when the conductive liquid injection tool bit is used for cutting or liquid injection.

In order to prevent the excessive entering of the conductive liquid injection tool bit into the insulating outer tube (namely, the tool bit part is retracted into the insulating outer tube), the operation is influenced, and the left end outer side of the annular boss is further optimized and provided with an annular flange, and the outer diameter of the annular flange is larger than the inner diameter of the insulating outer tube. Another optimization mode is as follows: the inside fixed mounting in 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 the 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 preferably, the right end of the insulating outer tube is connected with the left end outlet of the liquid injection three-way tube through an outer tube 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 left end outer side wall of the outer tube fixing piece is provided with a right inclined inverted tooth, and the right end outer side wall of the outer tube fixing piece is provided with an external thread.

Still be equipped with annular spacing face between pawl and screw thread, insulating outer tube's right-hand member cover is established in the left end of outer tube mounting, and its inside wall and pawl complex position are equipped with and are used for the pawl to slide into and spacing blind hole, and insulating outer tube's right-hand member face is spacing by the annular spacing face of outer tube mounting. The left end outlet sleeve of the liquid injection three-way pipe is arranged 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 inner thread matched with the outer thread. The inside through-hole that link up its left and right sides terminal surface that is equipped with of outer tube mounting, the through-hole internal diameter is greater than the cable external diameter. Can realize through this portion optimization that outer tube mounting is connected with insulating outer tube and annotating the dismantlement of liquid three-way pipe, and then be convenient for wash and replace. During installation, the insulating outer pipe can be sleeved at the left end of the outer pipe fixing piece, when the right end face of the insulating outer pipe is abutted with the limiting face on the outer pipe fixing piece, the insulating outer pipe or the outer pipe fixing piece is rotated, the inverted tooth on the outer pipe fixing piece enters the blind hole, and the insulating outer pipe and the outer pipe fixing piece are fixedly connected through the limiting effect of the blind hole on the inverted tooth in the axial direction. When the insulating outer tube and the outer tube fixing piece are disassembled, the insulating outer tube and the outer tube fixing piece can be rotated relatively again, the inverted tooth slides out of the blind hole, and then the axial limiting effect of the blind hole on the inverted tooth is eliminated, so that the insulating outer tube and the outer tube fixing piece are disassembled.

Further preferably, the device further comprises a protective tube, wherein the left end of the protective tube is sleeved outside the insulating outer tube, and the right end of the protective tube is tightly sleeved at the left end of the liquid injection three-way tube. The protective tube can avoid liquid leakage on the one hand, and on the other hand also can prevent that insulating outer tube from taking place rotatory withdrawal outer tube mounting in the use, and then break away from annotating the liquid three-way pipe. In order to ensure the connection firmness of the protection pipe and the liquid injection three-way pipe, the left end outer side wall of the liquid injection three-way pipe is further optimized, an annular flange is arranged on the left end outer side wall of the liquid injection three-way pipe, the protection pipe is an elastic pipe, and the right end of the protection pipe passes over the flange and is tightly attached to the liquid injection three-way pipe outer side wall on the right side of the flange.

Further preferably, the inner side wall of the right end outlet 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 inner thread. The annular step surface is provided with an annular sealing ring for preventing liquid from flowing out from the right end outlet of the liquid injection three-way pipe, the right side of the sealing ring is provided with an annular locking piece, the left end surface of the locking piece is abutted with the right end surface of the sealing ring, and the outer side wall of the locking piece is provided with an external thread matched with an internal thread on the inner side wall of the right hole.

Further 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 chute, and the core rod hole is communicated with the chute. . 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 oppositely arranged and coaxial with the core rod hole. The left end of the core rod is connected with the right end outlet 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 on the core rod and the through hole on the fixing seat from left to right. The boosting pipe and the inhaul cable are locked and fixed in the fixing seat through screws arranged in the electrode jacks. 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 pipe, the inhaul cable, the snare and the conductive liquid injection tool bit.

When the multifunctional incision knife is used, firstly, the head of the product can be folded to mark the focus part; then, in the state of furling and electrifying the electrode, injecting liquid through a liquid injection port of the liquid injection tee joint, enabling the liquid to flow to the conductive liquid injection tool bit through a gap between the inner cavity of the insulating outer tube and the inhaul cable, and realizing injection uplift on a focus part through a conductive liquid injection tool bit through hole after passing through the gap between the snare and the conductive liquid injection tool bit; then, in the furled and electrode electrifying state, cutting the edge of the focus part by adopting the cutter head part; finally, after the edge is cut, the slip ring can be pushed to push out the snare, the focus part is sleeved, and the mucosa is quickly peeled off by electrifying and cutting.

The invention has the technical effects that: the invention relates to a conductive liquid injection tool bit, water injection and snare integrated mucous membrane cutting knife, which realizes the peeling and water injection of tissues before and during endoscopic mucous membrane peeling operation, can continuously fill lost moisture in the operation process, avoids the situation of tissue over-cutting and perforation caused by moisture loss, simultaneously realizes the mucous membrane peeling function of focus parts in a snare combining way, reduces the replacement time of surgical instruments, saves the operation effort and time of doctors, and ensures that the operation is more efficient and safer.

Drawings

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

Fig. 1 is a schematic structural view of a multifunctional slicing knife according to embodiment 1 of the present invention.

Fig. 2 is an enlarged sectional view taken in the direction A-A of fig. 1.

Fig. 3 is an enlarged cross-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 cross-sectional view of C in fig. 1.

Fig. 6 is a schematic view showing an opened state of the multifunctional cutting blade in embodiment 1 of the present invention.

Fig. 7 is a schematic view showing the folding state of the multifunctional cutting blade in embodiment 1 of the present invention.

Fig. 8 is a schematic diagram of another structure of the conductive liquid injection head 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 cutter in fig. 8.

Fig. 10 is a schematic view of another structure of the fixing base, the electrode plug and the core bar of the present invention.

In the figure: 1. the device comprises a conductive liquid injection tool head, 101, a thulium knife, 102, an annular boss, 103, an annular flange, 2, a snare, 3, a guy cable, 4, an insulating layer, 5, an insulating outer tube, 6, a liquid injection tee, 601, an annular flange, 602, a liquid inlet, 7, a fixing pin, 8, a limiting tube, 9, an outer tube fixing piece, 901, a inverted tooth, 902, external threads, 903, an annular limiting surface, 10, a protective tube, 11, a sealing ring, 12, a locking piece, 13, a slip ring, 14, a core rod, 15, a boosting tube, 16, a fixing seat, 17, a screw, 18, an electrode plug and 19, a butt tube.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only those features which are relevant to the invention, and orientation and reference (e.g., up, down, left, right, etc.) may be used solely to aid in the description of 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 cutting knife of the embodiment comprises a conductive liquid injection knife head 1, a snare 2, a guy rope 3, an outer tube component and a core bar connected with the right end of the outer tube component, wherein both the snare 2 and the guy rope 3 can conduct electricity. The conductive liquid injection tool bit 1 is provided with a through hole serving 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 which is arranged on the core bar in a sliding way. The left end of the ring sleeve is connected with the tail of the conductive liquid injection tool bit, and the right end of the ring sleeve stretches into the outer tube assembly and is connected with the left end of the inhaul cable through the conductive butt joint pipe 19. The right end of the inhaul cable 3 penetrates out of the outer tube assembly and is electrically connected with the electrode plug, the inhaul cable 3 can be pulled by the slip ring 13 and drives the snare 2 and the conductive liquid injection tool bit 1 to axially move in the outer tube assembly, when the snare 2 moves rightwards, the snare 2 can be taken in the outer tube assembly, when the snare is taken in the outer tube assembly, the tail part of the conductive liquid injection tool bit is inserted into the sleeve assembly and is radially limited by the sleeve assembly, and an insulating layer 4 is arranged between the contact surface of the conductive liquid injection tool bit 1 and the sleeve assembly. Specifically, the outer tube assembly includes insulating outer tube 5 and notes liquid three-way pipe 6, the left end of insulating outer tube 5 is the left end of outer tube assembly promptly, and the right-hand member of insulating outer tube 5 is connected with the left end exit linkage of annotating liquid three-way pipe 6, and annotate the right-hand member export of liquid three-way pipe 6 and be connected with the core bar, annotate the liquid inlet 602 of liquid three-way pipe and be the notes liquid mouth of outer tube assembly promptly. The liquid injected into the insulating outer tube 5 can flow out from the conductive liquid injection tool bit through the axial through hole of the conductive liquid injection tool bit 1.

The head of the conductive liquid injection tool bit is a thulium tool 101, an annular boss 102 is arranged on the outer side of the tail of the conductive liquid injection tool bit, and the insulating layer 4 is coated on the outer surface of the annular boss 102 through heat shrinkage. The through hole of the conductive liquid injection tool bit 1 is used as a liquid injection channel and is a step hole, the conductive liquid injection tool bit comprises a large hole positioned in an annular boss and a small hole positioned in a thulium knife, the left end of the snare is inserted into the large hole and limited by a fixing pin 7, two ends of the fixing pin 7 are connected with the side wall of the large hole, two through holes are relatively formed in the side wall of the specific large hole, the fixing pin 7 is inserted into the through holes, two ends of the fixing pin 7 are respectively positioned in the two through holes, and the fixing pin is limited by the axial direction of the through holes.

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 (bonding, threaded connection or inverted tooth connection can be adopted between the limiting pipe and the insulating outer pipe). 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 tool bit along the axial direction.

The right-hand member of insulating outer tube 5 passes through outer tube mounting 9 and annotates the left end exit linkage of liquid three-way pipe 6, and outer tube mounting 9 is tubular connecting piece and its internal diameter is greater than the cable external diameter (cable cross section circle diameter), and the left end lateral wall of outer tube mounting 9 is equipped with two rows of unidirectional pawl 901 that incline to the right along the axial, and every row pawl has two and just around 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 tooth and the external thread, the annular limiting surface 903 is inclined to the right upper side and 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 cover of insulating outer tube 5 is established in the left end of outer tube mounting 9, and its inside wall is equipped with the blind hole that is used for the pawl to detain and spacing with one-way pawl 901 complex position, and its right-hand member face is spacing by the annular spacing face of outer tube mounting. The left end outlet sleeve of the liquid injection tee 6 is arranged at the right end of the outer pipe fixing piece, and the inner side wall of the liquid injection tee is provided with an internal thread matched with the external thread. During installation, the insulating outer pipe can be sleeved at the left end of the outer pipe fixing piece, when the right end face of the insulating outer pipe is abutted with the right end of the limiting face on the outer pipe fixing piece, the insulating outer pipe or the outer pipe fixing piece is rotated, the inverted tooth on the outer pipe fixing piece enters the blind hole, and the insulating outer pipe and the outer pipe fixing piece are fixedly connected through the limiting effect of the blind hole on the inverted tooth in the axial direction. When the insulating outer tube and the outer tube fixing piece are disassembled, the insulating outer tube and the outer tube fixing piece can be rotated relatively again, the inverted tooth slides out of the blind hole, and then the axial limiting effect of the blind hole on the inverted tooth is eliminated, so that the insulating outer tube and the outer tube fixing piece are disassembled.

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

The left end lateral wall of annotating the liquid three-way pipe is equipped with annular flange 601, the protection pipe is the elastic tube, and its left end passes over flange 601 and closely laminates with the annotating liquid three-way pipe lateral wall on flange right side.

The inner side wall of the outlet at the right end of the liquid injection tee pipe 6 is provided with 1 annular step surface, the aperture of the right hole of the step surface is larger than that of the left hole of the step surface, and the inner side wall of the right hole is provided with an inner thread; the annular step surface is provided with an annular sealing ring 11 for preventing liquid from flowing out from the right end outlet of the liquid injection three-way pipe, the right side of the sealing ring 11 is provided with an annular locking piece 12, the left end surface of the locking piece is abutted with the right end surface of the sealing ring, and the outer side wall of the locking piece is provided with an external thread matched with an internal thread on the inner side wall of the right hole.

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 chute, and the core rod hole is communicated with the chute. The slip ring 13 is provided with a slip ring hole, 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 the through holes are oppositely arranged and coaxial with the core rod hole. The left end of the core rod 14 is connected with the right end outlet of the liquid injection three-way pipe 6, a boosting pipe 15 is sleeved outside the right end of the inhaul cable 3, and the boosting pipe and the inhaul cable sequentially pass through the sealing ring 11, the core rod hole on the core rod 14 and the through hole on the fixing seat 16 from left to right. The boosting pipe 15 and the inhaul cable 3 are locked and fixed in the fixed seat through a screw 17 arranged in the electrode jack. When in use, 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 inhaul cable, the snare and the conductive liquid injection tool bit through the electrode plug 18.

When the multifunctional cutting knife is used, firstly, the head of the multifunctional cutting knife can be folded (the folding is to point to the right, the sliding ring is pulled, the guy cable is pulled, the snare is retracted into 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, and 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 cutting knife, as shown in fig. 7), and focus positions are marked; then, in the state of furling and electrifying the electrode, injecting liquid through a liquid injection port of the liquid injection tee joint, enabling the liquid to flow to the conductive liquid injection tool bit through a gap between the inner cavity of the insulating outer tube and the inhaul cable, and realizing injection uplift on a focus part through a conductive liquid injection tool bit through hole after passing through the gap between the snare and the conductive liquid injection tool bit; then, in the furled and electrode electrifying state, cutting the edge of the focus part by adopting the cutter head part; finally, after the edge is cut, the slip ring is pushed to push out the snare to enable the multifunctional cutting knife to be in an open state (see fig. 6), and the focus part is sleeved and electrified to be cut off, so that the mucous membrane is quickly peeled off.

Fig. 8 and 9 are schematic diagrams of another structure of the conductive liquid injection tool bit and the insulating outer tube, wherein an annular flange 103 is arranged on the outer side of the left end of the annular boss of the conductive liquid injection tool bit, and the outer diameter of the annular flange is larger than the inner diameter of the insulating outer tube. Through the limiting effect of annular flange, avoid electrically conductive notes liquid tool bit too much entering insulating outer tube. The limiting tube 8 is not arranged on the inner side wall of the insulating outer tube in the embodiment.

Fig. 10 is a schematic diagram of another structure of the fixing base 16, the electrode plug 18, the cable 3, the slip ring 13 and the core rod 14. The fixing 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 fixing 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 the through holes are oppositely arranged and coaxial with the core rod hole. The left end of the core rod 14 is connected with the right end outlet of the liquid injection three-way pipe 6, the right end of the inhaul cable 3 passes through the through hole on the fixed seat 16, extends rightward to the slide ring 13 and is fixedly connected with the slide ring, the inhaul cable 3 contacts with the outer wall of the inhaul cable 3 through the bottom of the stud 17 arranged in the electrode jack, and 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 snare and the conductive liquid injection tool bit through the electrode plug 18.

The liquid injection port in the above embodiment may also be directly disposed on the insulating outer tube 5, and the liquid injection tube is inserted into the liquid injection port, and meanwhile, the liquid injection tee 16 is replaced by a connecting tube, and the structure of the outlets at the left and right ends of the connecting tube is the same as the structure of the outlets at the left and right ends of the liquid injection tee 16. The materials of the 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 slip ring 13 and the core rod 14 are all high polymer materials meeting the conventional requirements of medical treatment, sanitation and the like.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme and the concept of the present invention, and should be covered by the scope of the present invention.

Claims

1. A multifunctional cutting knife, which is characterized in that:

the liquid injection device comprises a conductive liquid injection tool bit (1), wherein the conductive liquid injection tool bit (1) is provided with an axial through hole;

The electrode plug (18) and the slip ring (13) are arranged on the core rod in a sliding manner;

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

The insulation outer tube (5), the insulation outer tube (5) is provided with a liquid injection port or the right end of the insulation outer tube (5) is connected with a liquid injection three-way tube (6);

The cable (3), cable (3) wears to locate in the insulating outer tube, its left end and snare (2) fixed connection, its right-hand member and sliding ring (13) fixed connection, cable (3) are used for pulling or pushing snare (2), cable (3) can pull snare (2) and make electrically conductive notes liquid tool bit afterbody get into insulating outer tube (5), the afterbody of electrically conductive notes liquid tool bit (1) cooperates with the left end of insulating outer tube (5), and is equipped with insulating layer (4) between the two mating surfaces; the liquid injected into the insulating outer tube (5) can flow out from the conductive liquid injection tool bit through the axial through hole of the conductive liquid injection tool bit (1); the conductive liquid injection tool bit (1) and the snare (2) are electrically connected with the electrode plug (18) through a inhaul cable (3);

The head part of the conductive liquid injection tool bit (1) is a thulium tool (101), and an annular boss (102) is arranged on the outer side of the tail part;

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 tool bit (1) is a step hole and comprises a large hole positioned in the annular boss (102) and a small hole positioned in the thulium tool (101);

The left end of the ring sleeve (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;

an annular flange (103) is arranged on the outer side of the left end of the annular boss (102), and the outer diameter of the annular flange (103) is larger than the inner diameter of the insulating outer tube (5);

A limiting pipe (8) is fixedly arranged in the left end of the insulating outer pipe (5), the left end face of the limiting pipe (8) is spaced from the left end face of the insulating outer pipe (5), and the spaced distance is smaller than the length of the conductive liquid injection tool bit along the axial direction; the inner diameter of the limiting pipe (8) is smaller than the outer diameter of the annular boss (102).

2. The multi-function cutting knife according to claim 1, wherein: the right end of the insulating outer tube (5) is connected with the left end outlet of the liquid injection three-way tube (6) through an outer tube fixing piece (9);

The outer tube fixing piece (9) 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 a right inclined inverted tooth (901), and the outer side wall of the right end of the outer tube fixing piece is provided with an external thread (902);

An annular limiting surface (903) is 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 and limiting the inverted tooth (901) is formed in the position, 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 surface (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 inner thread matched with the outer thread (902).

3. The multi-function cutting knife according to claim 2, wherein: the protective tube (10) is further covered, the left end of the protective tube (10) is sleeved outside the insulating outer tube (5), and the right end of the protective tube is tightly sleeved at the left end of the liquid injection three-way tube (6).

4. A multi-function cutting knife according to claim 3, wherein: the left end lateral wall of annotating liquid three-way pipe (6) is equipped with annular flange (601), protection pipe (10) are the elastic tube, and its right-hand member passes annular flange (601) and closely laminates with the annotating liquid three-way pipe lateral wall on annular flange right side.

5. The multi-function cutting knife according to claim 2, wherein: the inner side wall of the right end outlet of the liquid injection tee pipe (6) is provided with 1 annular step surface, the aperture of the right hole of the annular step surface is larger than that of the left hole of the annular step surface, and the inner side wall of the right hole is provided with an inner thread;

The annular step surface is provided with an annular sealing ring (11) for preventing liquid from flowing out from a right end outlet of the liquid injection three-way pipe (6), the right side of the sealing ring (11) is provided with an annular locking piece (12), the left end surface of the locking piece (12) is abutted with the right end surface of the sealing ring (11), and the outer side wall of the locking piece (12) is provided with an external thread matched with the internal thread of the right side hole.

6. The multi-function cutting knife according to claim 2, 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 chute, and the core rod hole is communicated with the chute; 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 formed 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 coaxially with the core rod hole in a corresponding manner;

The left end of the core rod (14) is connected with the right end outlet of the liquid injection three-way pipe (6), a boosting pipe (15) is sleeved outside the right end of the inhaul cable (3), and the boosting pipe (15) and the inhaul cable (3) sequentially penetrate through the sealing ring (11), a core rod hole on the core rod (14) and a through hole on the fixing seat (16) from left to right; the boosting pipe (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 inhaul cable, the snare and the conductive liquid injection tool bit through the electrode plug (18).