CN219250398U - Plasma scalpel - Google Patents

Abstract

The utility model provides a plasma surgical knife, which comprises a handle (1), wherein one end of the handle (1) is connected with a knife head body (2) through a knife bar (3), an internal circuit is arranged in the handle shell (1), a power line correspondingly matched with the internal circuit is connected to the handle (1), and a suction tube (4) is also connected to the handle (1), and the plasma surgical knife is characterized in that: the cutter head body (2) is provided with a resistance layer (a) and an insulating heat conduction layer (b), and one end part of the handle (1) is provided with a first arc-shaped part (5). The utility model has simple structure and convenient use, and the insulating layer is not easy to fall off, thereby effectively avoiding the problem that the plasma discharge state is converted into high-frequency heating discharge.

Description

Plasma scalpel

Technical field:

the utility model relates to the field of medical instruments, in particular to a plasma scalpel.

The background technology is as follows:

the traditional high-frequency electrotome consists of a high-frequency power supply, a patient polar plate, connecting wires and electrodes. In most applications, current is passed through the patient via active leads and electrodes, and from the patient plate and its leads back to the high frequency power generator. The tissue is heated when the high-frequency high-voltage current generated by the tip of the effective electrode of the cutter head contacts with the body, so that the separation and solidification of the body tissue are realized, and the purposes of cutting and hemostasis are achieved.

The plasma electric knife is a novel soft tissue minimally invasive ablation technology developed in recent years, does not generate high temperature and carbonization collateral damage caused by a high-frequency electric knife, and can reserve normal cells of tissues to the maximum extent.

Most of the plasma electric knives used in clinic at present adopt a knife head structure of a wire electrode and a needle electrode, biological tissues are ablated by plasma discharge near the electrode, for example, the plasma electric knife for prostatectomy operation is used for scraping (ablating) the proliferated tissues on the surface of the prostate by utilizing the wire electrode structure. The low-temperature plasma operation of the intervertebral disc protrusion adopts a needle electrode to insert the intervertebral disc to ablate redundant tissues, so that the protruding intervertebral disc is retracted into position. The tumor resection procedure inserts needle electrodes into the tumor and ablates tumor tissue surrounding the electrodes. The working principle is that electrolyte ions containing water and trace sodium chloride between a plasma electrode and biological tissues are excited by pulse energy to gasify to form a plasma field, the electrode is taken as a core, a water vapor plasma and a sodium chloride plasma thin layer are formed around the electrode, a large amount of high-energy plasmas are generated in the thin layer, and molecular bonds of cell proteins of pathological tissues are cut off, so that pathological tissues around the electrode are ablated.

The plasma knife can ablate pathological tissues in a low-temperature environment of 50-70 ℃ to achieve the precise minimally invasive operation effect, so that the pain of a patient is relieved, and the postoperative complications are reduced.

A significant difference between the high-frequency electrotome and the plasma electrotome is that the surface of the high-frequency metal electrotome is not covered with an insulating layer, and biological tissues are cut and coagulated directly by utilizing good high-frequency current conduction heating. The plasma metal electrotome is generally covered with a partial insulating layer on the surface, and the plasma generated by the contact discharge and the dielectric barrier discharge is used for cutting and solidifying biological tissues.

When the existing plasma electric knife works, the knife head is coated with a thicker insulating layer, the bonding force is low, and the insulating layer of the knife edge part is easy to peel off during plasma discharge, so that the knife head is changed from a plasma discharge state to high-frequency heating discharge, and high temperature and carbonization collateral damage are caused at a tissue incision.

The utility model comprises the following steps:

the utility model aims to overcome the defects in the prior art and provides a plasma surgical knife.

The application provides the following technical scheme:

the utility model provides a plasma scalpel, it includes the handle, is connected with the tool bit body through the cutter arbor in handle one end connection, is equipped with internal circuit in the handle, connect on the handle with internal circuit corresponds complex power cord, still be connected with on the handle and inhale the pipe, its characterized in that: the cutter head body is provided with a resistance layer and an insulating heat conduction layer, and a first arc-shaped part is arranged at one end of the handle.

On the basis of the technical scheme, the following further technical scheme is also available:

the resistance layer covers the cutter head body cutting edge, and the insulating heat conduction layer covers other positions of the cutter head body.

And the insulating heat conducting layer is also covered with a Teflon coating.

A second arc-shaped part is arranged at the end part of the other end of the handle.

The utility model has the advantages that:

the utility model has simple structure and convenient use, and the insulating layer is not easy to fall off, thereby effectively avoiding the problems of high temperature and carbonization collateral damage at the incision caused by converting the plasma discharge state into high-frequency heating discharge.

Description of the drawings:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of an end portion of the bit body of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic illustration in use;

Detailed Description

As shown in fig. 1-3, a plasma scalpel comprises a handle 1, wherein one end of the handle 1 is connected with a cutter bar 3, one end of the cutter bar 3 is inserted with a cutter head body 2, the cutter bar 3 is also movably connected with a protective sleeve 2b, and when the cutter head body 2 is connected with the cutter bar 3, the protective sleeve 2b is rotated to enable the cutter head body 2 to migrate to cover the joint of the cutter bar 3 and the cutter head body 2. And after the rotary protective sleeve is moved backwards to leak out of the joint, the new cutter head body is replaced, and then the cutter head body is replaced by pulling out and inserting.

An internal circuit is arranged in the handle 1, one end of the handle 1 is connected with a power wire 9 correspondingly matched with the internal circuit, and a switch correspondingly matched with the internal circuit is also arranged on the upper part of the handle 1. The internal circuit is in electric signal connection and coordination with the tool bit body 3 through the same type of lead which is not shown. A suction tube 4 communicated with the cavity inside the handle 1 is connected to one end of the handle 1. Since the internal structure of the handle 1 is connected to the circuit and the control manner is the prior art, only a brief description will be given here.

A first arc-shaped part 5 is arranged at the lower side of one end part of the handle 1, and a second arc-shaped part 6 is arranged at the lower side of the other end part of the handle 1. When the handle 1 is used, a user clamps the handle 1 by using an index finger and a thumb, and uses the index finger to control the switch, the tiger mouth is clamped at the first arc-shaped part 5, and the middle finger can be padded at the second arc-shaped part 6, so that the stability of the user for grabbing the handle 1 and the grabbing comfort can be effectively ensured, and the handle is convenient for the user to operate.

A layer of TiO2 or SiO2i material is formed on the blade portion 2a of the bit body 2 by a magnetron sputtering method, thereby forming a resistive layer a on the upper surface of the blade portion 2 a. The contact discharge current of the blade can be reduced when the blade is used by the resistor film, the plasma discharge temperature is effectively reduced, the strength of the blade is increased, and a uniform plasma discharge channel is generated.

And preparing a layer of existing materials such as SiO2, si2N4, al2O3 and the like on the rest part except the blade part of the cutter head body 2 by utilizing a magnetron sputtering method, thereby forming an insulating heat conducting layer b. Has the effects of insulation, heat conduction and superhard. And a Teflon coating c is further covered on the insulating heat conducting layer b. The tool bit body 2 is effectively guaranteed to have non-tackiness, low friction coefficient and extremely high surface resistance.

Example 2:

example 2 differs from example 1 in that: the handle 1 is not provided with a second arcuate portion 6.

As shown in fig. 4, in the cutting and solidification process during operation, the cutter head body generates contact discharge and dielectric barrier discharge at the tip of the cutter blade under the skin effect of 1 mhz wave of the plasma high-frequency pulse power supply, and the energy of vapor plasma and sodium chloride plasma generated by the discharge electric field is restrained in a small range near the cutter blade. The generated vapor plasma and sodium chloride plasma also have high enthalpy value, strong oxidation-reduction capability and good ecological effect, and promote the healing of wounds after operation. Experiments prove that the operation smoothness is good, and the knife edge formed by the plasma is very sharp.

The incision is neat, without collateral thermal injury and carbonization of biological tissue when the biological tissue 8 is cut, and the wound healing is faster than that of the incision cut by a surgical knife and a high-frequency electrotome. The high-frequency plasma power supply output voltage of the plasma electric knife is lower in the cutting working state, the high-resistance film of the blade part reduces the discharge current of the contact resistor, the plasma discharge temperature in the cutting process is reduced, and the high-resistance film of the blade part has little influence on the dielectric barrier discharge effect of the plasma.

When the plasma electrotome is solidified in the working state, the voltage output by the high-frequency plasma power supply is higher, the discharge current of the contact resistance of the blade part is increased, and the higher temperature produces the solidification hemostasis effect on biological tissues and blood vessels. And pulse radio frequency energy is sent out to enable electrolyte in biological tissues to be vaporized and decomposed, and lamellar plasmas 7 are generated at the tip end of the cutter head, and charged particles of the plasmas are accelerated by an electric field to directly break molecular bonds of cell tissues, so that the effects of cutting, ablation, hemostasis and the like are achieved.

Claims (4)

1. The utility model provides a plasma scalpel, it includes handle (1), is connected with tool bit body (2) through cutter arbor (3) in handle (1) one end connection, is equipped with internal circuit in handle (1), connects on handle (1) and corresponds complex power cord with internal circuit, still is connected with suction tube (4), its characterized in that on handle (1): the cutter head body (2) is provided with a resistance layer (a) and an insulating heat conduction layer (b), and one end part of the handle (1) is provided with a first arc-shaped part (5).

2. A plasma surgical knife according to claim 1, wherein: the electric resistance layer (a) covers the blade part of the tool bit body (2), and the insulating heat conduction layer (b) covers the rest parts except the blade part of the tool bit body (2).

3. A plasma surgical knife according to claim 1, wherein: the insulating heat conducting layer (b) is also covered with a Teflon coating (c).

4. A plasma surgical knife according to claim 1, wherein: the other end part of the handle (1) is provided with a second arc-shaped part (6).

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