CN110897708A

CN110897708A - Single-channel high-frequency electrotome

Info

Publication number: CN110897708A
Application number: CN201911166517.7A
Authority: CN
Inventors: 马文聪; 张筱凤; 楼奇峰
Original assignee: Hangzhou First Peoples Hospital
Current assignee: Hangzhou First Peoples Hospital
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-03-24

Abstract

The invention provides a single-channel high-frequency electrotome, and belongs to the technical field of medical instruments. The high-frequency electrotome solves the problems that the diameter of a liquid circulation pipeline of the existing high-frequency electrotome is small, an additional pressure pump is needed, and the cost is high. The invention comprises an operation part, a main body part and an operation part which are connected in sequence, wherein the operation part comprises an electrotome and a transfusion channel arranged outside the electrotome, the electrotome can reciprocate along the length direction of the transfusion channel, the transfusion channel is used for conveying physiological saline to the electrotome head part, the electrotome head part is provided with an opening for spraying the physiological saline, a blood coagulation ring is also arranged outside the transfusion channel, the main body part is provided with a transfusion port and an electrifying port, the electrifying port is used for supplying power to the electrotome and the blood coagulation ring, the operation part comprises an operation sliding block, a core bar and a holding main body, and two ends of the core bar are respectively connected with the. The invention has the advantages of greatly reducing the pressure requirement on transfusion, along with simple operation, reduced wound bleeding and contribution to the rapid recovery of patients.

Description

Single-channel high-frequency electrotome

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a single-channel high-frequency electrotome.

Background

Endoscopic Submucosal Dissection (ESD) refers to an Endoscopic minimally invasive technique that utilizes high frequency instruments to perform submucosal dissection of lesions larger than 2 cm. Compared with the traditional surgical operation, the ESD better maintains the physiological function of the digestive tract on the basis of radical treatment of tumors, obviously improves the postoperative life quality of patients, and becomes the first choice treatment method for early cancer and precancerous lesion of the digestive tract including esophagus at present. The ESD is to output high-frequency current through external equipment, form a loop through a human body, and form high-density current at a cutter wire part with a small sectional area to realize cutting.

Chinese patent publication No. CN208808644U discloses a dual-electrode high-frequency electric knife capable of injecting liquid in two channels, which comprises an electrode part, a main body part and an operation part. The electrode part comprises an active electrode, an insulating filling layer and an inert electrode, the active electrode is provided with a hollow tubular part, and the active electrode can cut target pathological change tissues by switching on a power supply; the main body part comprises a protection pipe, an insulating outer pipe, a spiral piece coated with an insulating coating, a connecting piece, a sealing piece and the like. The spiral piece coated with the insulating coating comprises a conductive spiral piece and the insulating coating coated on the surface of the spiral piece; the operation part comprises a positioning structure, a sliding block, a core rod, a connecting sheath tube, a transfusion tube and a connecting cable, wherein 6% luer connectors are connected to the positioning structure and the transfusion tube, and physiological saline can flow out of the hollow tubular part of the active electrode to carry out submucosal injection so as to bulge mucosal tissues and clean bleeding parts. The physiological saline can also pass through the gap between the active electrode and the insulating filling layer, so that the tissue adhered to the active electrode and the insulating body and the bleeding part are cleaned. However, in this structure, since the diameter of the physiological saline flow channel is small, a higher pressure is required for the infusion end to input the physiological saline, and therefore, an additional pressure pump is required to achieve this function.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a single-channel high-frequency electrotome which has low requirement on the physiological saline pressure, does not need a pressure pump and is simple to operate.

The purpose of the invention can be realized by the following technical scheme: a single-channel high-frequency electrotome, which comprises an operation part, a main body part and an operation part which are connected in sequence and is characterized in that, the operation part comprises a hollow electric knife and an insulating sheath arranged outside the electric knife, the electric knife can reciprocate along the length direction of the insulating sheath, a transfusion channel communicated with the main body part and the electrotome is also arranged at one side of the insulating sheath close to the main body part, the electric knife head part is provided with an opening for spraying physiological saline, the outside of the insulating sheath is also provided with a coagulation ring, the main body part is provided with a transfusion port for inputting physiological saline into the insulating sheath and an electrifying port for supplying power to the electrotome and the coagulation loop, the operating part comprises an operating slide block, a core bar and a holding main body, wherein two ends of the core bar are respectively connected with the operating slide block and the electric knife, the operation slider drives the core bar to reciprocate along the length direction of the holding main body so as to control the movement of the electric knife and the electrifying states of the electric knife and the coagulation ring.

The working principle of the invention is as follows: the electrified state of the electric knife and the coagulation ring is divided into two gears, when the electric knife extends out of the insulating sheath, the electric knife is in a cutting state, and the electric knife is electrified; when the electrotome is completely retracted into the insulating sheath, the coagulation ring is electrified, and the state of coagulation is at the moment. When excising the tumour, paste on the patient with the inert electrode earlier, make the electrotome circular telegram be in the cutting state through removing the operation slider and excise the tumour, switch over the electrotome through removing the operation slider and make the wound intensification blood coagulation for the coagulation state to can stanch fast the place that bleeds to the large tracts of land, the normal saline of insulating sheath washs the position of bleeding from the blowout of electrotome head portion. Adopt the setting of above-mentioned structure, insulating sheath compares originally all to set up the tiny pipeline input end flow in electrotome inside and improves greatly, requires greatly reduced to the pressure of infusion end, has cost reduction, easy operation moreover, reduces the wound and bleeds, is favorable to the advantage that patient resumes rapidly.

In the single-channel high-frequency electrotome, the end part of the electrotome, which is far away from the main body part, is provided with the funnel-shaped bulge, and the bulge can extend out of or retract into the insulating sheath along with the electrotome.

In the single-channel high-frequency electrotome, the electrotome is connected with the core rod through a conductive spiral connecting piece.

In the single-channel high-frequency electrotome, the holding main body is provided with two contacts which are a cutting contact and a coagulation contact in sequence, and the operating slide block is provided with a power-on contact.

In the single-channel high-frequency electrotome, the holding main body is provided with the installation slide way, the installation slide way divides the holding main body into a left arc-shaped slide piece and a right arc-shaped slide piece, the operation slide block is provided with an installation hole matched with the shape of the slide pieces, and the slide pieces are inserted into the installation hole to realize the sliding connection of the operation slide block and the holding main body.

In the single-channel high-frequency electrotome, the main body part further comprises an outer insulating sleeve connected with the insulating sheath, the electrotome and the infusion channel are arranged in the outer insulating sleeve, the electrotome is wrapped in the middle of the infusion channel, and the electrotome can reciprocate in the infusion channel along the length direction of the infusion channel.

In the single-channel high-frequency electrotome, the section of the electrotome wrapped by the infusion channel is provided with a connecting pipe which is communicated with the infusion channel and can move along with the electrotome in a telescopic way.

In the single-channel high-frequency electrotome, the surfaces of the electrotome and the insulating sheath are both coated with anti-adhesion coatings.

Compared with the prior art, the invention has the beneficial effects that: compared with the original double-channel design, the single-channel electric knife has the advantages that the single-channel electric knife is changed into the single-channel electric knife, the insulating sheath wraps the electric knife, the flow of the insulating sheath and the flow of the inside of the electric knife are greatly improved compared with the flow of two original small pipelines, the requirement on the pressure of infusion is greatly reduced, the operation is simple, the bleeding of wounds is reduced, and the quick recovery of patients is facilitated.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of the electrotome structure of FIG. 1;

FIG. 3 is a schematic structural view of an operating slider;

FIG. 4 is a schematic view of the structure of the operation part;

fig. 5 is a schematic cross-sectional view of the body portion.

In the figure, 1, an operation part; 2. a main body portion; 3. an operation section; 4. an electric knife; 5. an insulating sheath; 6. a blood coagulation loop; 7. an infusion port; 8. a power-on port; 9. operating the slide block; 10. a core bar; 11. a holding body; 12. a protrusion; 13. a fluid infusion channel; 14. a screw connection; 15. cutting a contact; 16. a coagulation contact; 17. a power-on contact; 18. installing a slideway; 19. sliding blades; 20. and an outer insulating sleeve.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

The purpose of the invention can be realized by the following technical scheme:

as shown in fig. 1-5, the single-channel high-frequency electrotome comprises an operation part 1, a main body part 2 and an operation part 3 which are connected in sequence, wherein the operation part 1 comprises an electrotome 4 which is arranged in a hollow manner and an insulating sheath 5 which is arranged outside the electrotome 4, the electrotome 4 can reciprocate along the length direction of the insulating sheath 5, one side of the insulating sheath 5 which is close to the main body part 2 is also provided with a transfusion channel 13 which is communicated with the main body part 2 and the electrotome 4, the head part of the electrotome 4 is provided with a hole for spraying physiological saline, the outside of the insulating sheath 5 is also provided with a coagulation ring 6, the main body part 2 is provided with a transfusion port 7 for inputting the physiological saline into the insulating sheath 5 and an electrifying port 8 for supplying power to the electrotome 4 and the coagulation ring 6, the operation part 3 comprises an operation slider 9, a core bar 10 and a holding main body 11, two ends of the core bar 10 are respectively connected with the, the operation slider 9 drives the core bar 10 to reciprocate along the length direction of the holding main body 11 so as to control the movement of the electric knife 4 and the electrifying state of the electric knife 4 and the coagulation loop 6. The electric knife 4 is an active electrode, and the current passes through the patient through an effective lead and the active electrode by sticking the inert electrode on the patient, and then returns to the generator of the high-frequency electric knife 4 through a patient polar plate, namely the inert electrode and the lead thereof. When the high-frequency high-voltage current generated by the high-frequency electric knife 4 passes through a high-impedance tissue, heat is generated in the tissue, and the tissue is gasified or coagulated. During electrosurgical use, the resistance varies from 100 ohms to 2000 ohms. As the tissue coagulates, water in the cells vaporizes, drying the tissue, causing the resistance to increase and eventually the current to stop completely.

The insulating sheath 5 has a much larger flow rate than the channel provided in the centre of the fine electrotome 4, thus enabling the pressure requirements for infusion to be greatly reduced.

In more detail, the electric knife 4 is provided with a funnel-shaped protrusion 12 at the end part far away from the main body part 2, and the protrusion 12 can extend out of or retract into the insulating sheath 5 along with the electric knife 4. By adopting the structure, the unit flow of the physiological saline in the electrotome 4 is greatly increased compared with the original tiny pipeline, and the pressure required by the transfusion port 7 is also greatly reduced. The insulating filling layer 13 can well fill the gap between the protruding 12 part of the electric knife 4 and the insulating sheath 5.

In more detail, the electric knife 4 is connected to the core rod 10 via an electrically conductive screw connection 14. The conductive screw connector 14 has elasticity and torsion, and the surface is covered with an insulating coating. By adopting the arrangement, the spiral connecting piece 14 has good flexibility, is convenient to bend, and has small resistance value and good cutting effect.

In more detail, the holding main body 11 is provided with two contacts, namely a cutting contact 15 and a coagulation contact 16, in sequence, and the operating slider 9 is provided with an electrifying contact 17. The part closest to the main body part 2 is a cutting contact 15, and then a coagulation contact 16, wherein the cutting contact 15 corresponds to the state when the bulge 12 of the electric knife 4 completely extends out of the insulating filling layer 13; the coagulation contact 16 is corresponding to the electric knife 4 and the bulge 12 is completely stretched into the insulating filling layer 13, the coagulation ring 6 is electrified, the area of the coagulation ring 6 is far larger than the area of the bulge 12 of the electric knife 4, large-range coagulation can be carried out, quick hemostasis is carried out, two contacts are switched by moving the operation slider 9, the electric knife 4 or the coagulation ring 6 is electrified when the electric contact 17 is in contact with the cutting contact 15 or the coagulation contact 16, and the electrification is realized.

In more detail, the holding main body 11 is provided with an installation slide way 18, the installation slide way 18 divides the holding main body 11 into a left arc-shaped slide piece 19 and a right arc-shaped slide piece 19, the operation slide block 9 is provided with an installation hole matched with the slide piece 19 in shape, and the slide piece 19 is inserted into the installation hole to realize the sliding connection between the operation slide block 9 and the holding main body 11. The operation is convenient.

In further detail, the main body part 2 further comprises an outer insulating sleeve 20 connected with the insulating sheath 5, the electric knife 4 and the infusion channel 13 are arranged in the outer insulating sleeve 20, the electric knife 4 is wrapped in the middle of the infusion channel 13, and the electric knife 4 can reciprocate in the infusion channel 13 along the length direction of the infusion channel 13.

In a further detail, a connecting pipe which is communicated with the transfusion channel 13 and can move with the electric knife 4 in a telescopic way is arranged on the wrapping section of the electric knife 4 by the transfusion channel 13. Other communication means are also possible.

In more detail, the surfaces of the electric knife 4 and the insulating sheath 5 are both coated with anti-adhesion coatings. Capable of preventing tissue adhesion, the material of the coating may include, but is not limited to, titanium nitride (TiN), chromium nitride (CrN), titanium aluminum nitride (TiAlCN), titanium aluminum nitride (TiAlN), diamond-like carbon (DLC), Polytetrafluoroethylene (PTFE), and the like.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms of the operation part 1, the main body part 2, the operation part 3, the electric knife 4, the insulating sheath 5, the blood coagulation ring 6, the infusion port 7, the power port 8, the operation slider 9, the stem 10, the grip body 11, the protrusion 12, the infusion channel 13, the screw connector 14, the cutting contact 15, the blood coagulation contact 16, the power contact 17, the mounting chute 18, the slide piece 19, the outer insulating sheath 20, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. A single-channel high-frequency electrotome comprises an operation part (1), a main body part (2) and an operation part (3) which are sequentially connected, and is characterized in that the operation part (1) comprises an electrotome (4) which is arranged in a hollow way and an insulating sheath (5) which is arranged outside the electrotome (4), the electrotome (4) can do reciprocating motion along the length direction of the insulating sheath (5), one side of the insulating sheath (5) which is close to the main body part (2) is also provided with a transfusion channel (13) which is communicated with the main body part (2) and the electrotome (4), the head part of the electrotome (4) is provided with a hole for spraying physiological saline, the outside of the insulating sheath (5) is also provided with a coagulation ring (6), the main body part (2) is provided with a transfusion port (7) for inputting the physiological saline into the insulating sheath (5) and a current-passing port (8) for supplying power to the electrotome (4) and the coagulation ring (6), the operation part (3) comprises an operation sliding block (9), a core bar (10) and a holding main body (11), wherein two ends of the core bar (10) are respectively connected with the operation sliding block (9) and the electric knife (4), and the operation sliding block (9) drives the core bar (10) to reciprocate along the length direction of the holding main body (11) so as to control the movement of the electric knife (4) and the electrifying states of the electric knife (4) and the coagulation loop (6).

2. A single channel high frequency electrotome according to claim 1, wherein the electrotome (4) is provided with funnel-shaped protrusions (12) at the end remote from the main body portion (2), said protrusions (12) being capable of extending with the electrotome (4) or retracting into the insulating sheath (5).

3. A single channel high frequency electrotome according to claim 1, wherein the electrotome (4) is connected to the core rod (10) by means of an electrically conductive screw connection (14).

4. The single-channel high-frequency electrotome according to claim 1, wherein the gripping body (11) is provided with two contacts, namely a cutting contact (15) and a coagulation contact (16), in sequence, and the operating slider (9) is provided with a corresponding energizing contact (17).

5. The single-channel high-frequency electrotome according to claim 1 or 4, wherein the holding main body (11) is provided with an installation slide way (18), the installation slide way (18) divides the holding main body (11) into a left arc-shaped slide piece and a right arc-shaped slide piece (19), the operation slide block (9) is provided with an installation hole matched with the slide piece (19) in shape, and the slide piece (19) is inserted into the installation hole to realize the sliding connection between the operation slide block (9) and the holding main body (11).

6. The single-channel high-frequency electric knife according to claim 1, wherein the main body part (2) further comprises an outer insulating sleeve (20) for connecting with the insulating sheath (5), the electric knife (4) and the infusion channel (13) are arranged in the outer insulating sleeve (20), the infusion channel (13) wraps the electric knife (4) in the middle, and the electric knife (4) can reciprocate in the infusion channel (13) along the length direction of the infusion channel (13).

7. The single-channel high-frequency electrotome according to claim 6, wherein a connecting pipe which is communicated with the infusion channel (13) and can move telescopically along with the electrotome (4) is arranged on the wrapping section of the electrotome (4) wrapped by the infusion channel (13).

8. The single-channel high-frequency electrotome according to claim 1, wherein the surfaces of the electrotome (4) and the insulating sheath (5) are coated with anti-adhesion coatings.