JPS6238646Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a return electrode plate for an electric scalpel.

Conventionally, this type of return electrode plate was a metal plate large enough to be placed on the patient's buttocks, and a wet cloth soaked in saline was placed on this plate to ensure sufficient electrical contact with the patient's body. Or, it was used by applying conductive cream.

However, the size of the return electrode is very small compared to the area that the patient contacts with the operating table, so during surgery,
The return electrode does not always have a sufficient area in contact with the patient, and if only a portion of the return electrode is in contact with the patient, the electric scalpel current will concentrate on that part. Accidents have frequently occurred in which patients develop abnormal heat in these areas, resulting in burns in those areas.

In addition, in order to prevent burns due to the use of the return electrode, it was necessary to observe a number of precautions, including: That is, a) The return electrode should be in contact with a sufficiently wide area, avoiding the patient's bony areas.

b. If there is a lot of body hair, shave that area before contacting the return electrode.

c When changing the body position during surgery, check the contact status of the return electrode again, and if necessary, move it to the area where there is sufficient contact area.

d When using a metallic return electrode, be careful not to let the chemical solution adhere to the return electrode, as the disinfectant used during surgery may adhere to the return electrode and form an electrically insulating film.

e Cloths containing physiological saline and conductive gel used to improve conductivity and ensure contact area dry out during long surgeries, resulting in a decrease in conductivity. Check.

f When using a return electrode plate that is attached to the human body using adhesive, there is a risk that part of it will come off during a long surgery when it is attached to a curved surface of the human body. to be in close contact with the human body.

g. Use a sufficient amount of physiological saline, conductive gel, etc., and in the case of gel, spread it evenly over the entire surface of the return electrode.

h For patients with oily skin, degrease the area where the return electrode will be contacted using alcohol, etc. to ensure good electrical contact.

i When contacting the return electrode, avoid areas where the surface is dry due to scabs or scars, making it difficult to conduct electricity.

etc. These many precautions add extremely complicated work to nurses and doctors who prepare for surgery, including other equipment used in the operating room, and are likely to cause careless mistakes. It was big and warm.

Furthermore, burn accidents occur not only at the adhesive site between the patient and the return electrode, but also at contact with electrocardiograph electrodes and other earth potential metals (metal trolleys for surgical instruments, metal outer walls of surgical beds, etc.). It also occurred at the site of the progenitor in the patient.

This idea was made in view of the actual situation,
The area of the return electrode is set as wide as the area of the operating table to minimize the current density at the contact surface of the return electrode, ensuring that there is always sufficient contact area no matter what position the patient lies on the operating table. The purpose is to prevent careless mistakes by drastically reducing the precautions required to prepare or maintain this state in conventional return electrodes, and to reduce the area of the return electrode. By making the area much larger than the commonly thought "sufficient area" and equal to the operating table, the contact impedance between the patient and the return electrode is reduced to an extent that was previously unimaginable. The purpose of this is to eliminate the occurrence of burn accidents at areas other than the return electrode plate.

The return electrode plate for an electric scalpel according to the present invention is a laminate in which a conductor, which is a vapor-deposited metal thin film, is interposed over the entire central part of a flexible plate-shaped insulator, and is formed into a laminate having the size of an operating table on which a patient lies. Most preferably, the conductor is a thin film of metal such as aluminum deposited on one side of a plate-shaped insulator, and the flexible plate-shaped insulator is arranged to sandwich the conductor.

The upper part of the return electrode according to the present invention that is in contact with the patient preferably has a high dielectric constant, and is particularly preferably a flexible vinyl chloride plate. The lower plate-shaped insulator may be the same vinyl chloride plate, but usually a more flexible material such as urethane resin is used. Further, the return electrode plate, which is formed to the size of an operating table, is used by being fitted into the bed itself on which the patient lies.

Note that this type of electric scalpel is often used while observing surgical X-ray television, so it is necessary that the return electrode plate does not disturb the fluoroscopic image. However, when using the metal thin film as the conductor, This is convenient because there is no such concern and a clear image is provided to the operator, and an X-ray television can be applied as needed while the device is fitted in the bed.

The present invention will be described below based on embodiments with reference to the drawings.

FIG. 1 is a partially cutaway perspective view showing the product of the present invention. The counter electrode plate 1 has a conductor 2 which is a plate-shaped insulator 3,
In this example, an aluminum thin film is deposited on the entire surface of one side of the plate-shaped insulator 3, and another plate-shaped insulator 3' covers the thin film 2. It is located.

Various types of metals that can be vapor-deposited, such as aluminum and copper, can be used for the metal thin film, and aluminum is particularly preferred. In addition, flexible rubber, plastic, asbestos, etc. are used as the plate-shaped insulator on which the metal thin film is deposited, but vinyl chloride resin having a high dielectric constant is particularly preferred.

Since the electric scalpel according to the present invention is energized with a high-frequency current, current can be passed between the blade tip of the scalpel and the conductor through the plate-shaped insulator 3.

The width a and the length b of the product of the present invention are determined so that the surgical table can be conveniently fitted into a bed used by a patient.

The return electrode plate 1 for an electric scalpel based on the above configuration has a second
As shown in the figure, when it is inserted into the bed 4 and installed as an operating table, the area that the patient 5 comes into contact with becomes significantly large, and therefore there is a gap between the scalpel blade 9 and the conductor 2 via the insulator 3. The flowing high-frequency current passes through almost the whole body of the patient 5, and the concentration of the current can prevent burns and the like.

Furthermore, since the plate-shaped insulators 3 and 3' are flexible members, they do not cause any discomfort to the patient when lying down, and are similar to installing a normal pinerest, so they do not need to be removed after surgery. In addition, when using a metal thin film, the X-ray tube 7 and fluorescence multiplier tube 8 fixed to both ends of the C-shaped arm 6 can be left as they are on the bed. Even if they are placed in the middle and facing each other, it does not interfere with obtaining a fluoroscopic image of the patient, making the surgery more effective. Furthermore, unlike conventional return electrodes, there is no need to monitor and correct the patient's contact status during surgery, the drying status of saline-soaked gauze, or the application status of conductive cream. Although it has many advantages, such as greatly simplifying the handling of the electric scalpel, it particularly reduces the aforementioned burns on the return electrode part A, burns in areas other than the return electrode part B, and the complicated and careless use of the return electrode C. It has become possible to completely eliminate, or at least significantly reduce, many precautions that can easily lead to mistakes, thus solving all the problems of the conventional technology at once, and its practical value is extremely great. There is something.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a return electrode plate for an electric scalpel according to the present invention, and FIG. 2 is an explanatory view showing the state of use of the product of the present invention. 1... Return electrode plate, 2... Conductor, 3, 3'... Plate insulator, 4... Bed.

Claims (1)

[Claims for Utility Model Registration] (1) A conductor is formed by depositing a metal thin film on the entire surface of one side of a flexible plate-shaped insulator, and the upper surface of the conductor is covered with another flexible plate-shaped insulator to form a conductor. 1. A return electrode plate for an electric scalpel, characterized in that it is a laminate having a conductor interposed between its parts, and the laminate is formed to have the size of an operating table on which a patient lies. (2) The return electrode plate for an electric scalpel according to claim 1, wherein the metal thin film is an aluminum thin film. (3) The return electrode plate for an electric scalpel according to claim 1, wherein the plate-like insulator is a vinyl chloride plate having a high dielectric constant. (4) The return electrode plate for an electric scalpel according to claim 1, which is a surgical table that is fitted into a bed on which a patient lies.