JPH046743Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention provides a means for electrically heating a replaceable knife blade in a surgical scalpel to perform incision and hemostasis. It is related to a knife blade that has both functions.

(Prior Art) Conventionally, in surgical operations, when a part of living tissue is incised, it is impossible to avoid cutting the capillaries distributed in the tissue, so there is no means to stop bleeding from the capillaries that occurs. has been considered. In order to partially incise living tissue, scalpels have been used that have both cutting and hemostatic functions. One of these is a high-frequency discharge scalpel that uses heat generated by spark discharge from high-frequency current to cut and coagulate blood to stop bleeding. On the other hand, there is a heated scalpel that has a plate-shaped blade attached with a heat generating means on one side, and uses the heated blade to cut living tissue and destroy capillaries with the heat to stop bleeding. Among them, a heating scalpel in which the blade body is made of a material other than a metal blade, such as single crystal alumina, and has a heating resistor pattern on one side is proposed as a solution to the disadvantageous problems of the prior art. Furthermore, recently, laser scalpels using carbon dioxide gas lasers have been widely used, which can cauterize tissue with a spot of laser beam and cut the tissue with less bleeding. but,
In the incision of various biological tissues that are the targets of surgical operations, there has been no knife blade of a standard surgical scalpel that has been widely used in the past that has the above-mentioned hemostasis effect at the same time.

(Problems to be solved by the invention) In view of the above-mentioned circumstances, this invention regulates the temperature of the cutting blade to the required heating temperature by supplying electricity to the scalpel blade itself and providing an electric heating means. An object of the present invention is to provide a scalpel blade which is formed so that its temperature does not drop during use, and which is provided with an easily replaceable engaging/disengaging means between the knife handle and the scalpel handle in order to maintain its sharpness.

[Structure of the idea]

(Means for solving the problem) In order to achieve the above-mentioned purpose, this invention provides a long groove that divides the blade in the longitudinal direction except for the tip of the plate-shaped blade, and at the rear end where it opens, A DC or AC conduction circuit is provided with the cutting blade side as the positive or negative electrode and the blade ridge side as the negative or positive electrode, so that only the edge of the cutting blade can be heated to the required heating temperature by energizing the blade body. A cut groove continuous with the long groove is provided along the edge of the cutting blade to near the tip of the blade to form a narrow conductive path separated from the blade.

In addition, a blade groove portion that engages with the locking means on the scalpel handle side is provided in the locking long groove of the blade body, so that the scalpel replacement blade can be detachably attached to the scalpel handle side, and the blade is connected to the heating power source through the connection terminal. Connect with electric heating means.

(Function) By using the technical means of this invention, for example, in the case of a scalpel with a heating resistance pattern on one side of the blade, the blade becomes thicker and it becomes difficult to cut deep into living tissue. A scalpel blade of an appropriate size and shape is selected in the conventional manner, and the electric heating means connected thereto achieves both cutting and hemostasis effects. Furthermore, the advantage of using a scalpel blade is that it can be removed and replaced to update its sharpness and maintain hygiene, which has a great effect in eliminating problems such as seizure, oxidation, and rust caused by heating the blade.

(Example) An example of this invention will be described below based on the drawings.

Figure 1 shows Example 1 of the female replaceable blade 1 of this invention, in which a standard type female replaceable blade, for example No. 62 with a thick blade, is processed by electric discharge machining to leave the tip 2 of the plate-shaped blade. A cut groove 4 that separates the blade in the thickness direction is provided along the cutting edge 3, and a narrow conductive path that makes the separated width and thickness equal to the tip 2 of the blade is provided at the cutting edge. Form into 3. On the other hand, a narrow blade groove 5 that is engaged with a locking means of a knife handle M provided longitudinally in the central part of the blade body where the standard knife replaceable blade 1 is formed, and an introduction part into which the knife handle M is fitted. The above-mentioned cut groove 4 is formed continuously at the front end of the locking long groove 7 consisting of 6, and the blade base edge 10 is formed in the direction of oblique cutting in the longitudinal direction of the rear end part 9 of the blade body.
, a terminal 11 whose blade edge side and blade ridge side are respectively a positive electrode or a negative electrode, and a negative electrode or a positive electrode;
12 are provided at the opening of the locking long groove 7.

The rear end of the above-mentioned cut groove 4 opens into the blade groove 5 of the locking long groove 7, extends from the terminal 11 on the blade edge side, passes through the blade edge 3 to the blade tip 2, and is folded back to form the blade on the blade ridge side. The cutting blade edge 3 forms a conductive closed circuit along the body 13 to the terminal 12 on the blade ridge side, and becomes a narrow narrow path.
Electric heating means are connected as shown in FIG. 5 so that a desired heating temperature can be obtained along the lines.

In addition, FIG. 2 shows Example 2, in which the female replaceable blade No. 62, which has a large blade thickness, was formed by electrical discharge machining, similar to Example 1, and the cutting blades separated by the cutting groove 4a are more similar to Example 1. The width of the edge 3 is wide at the blade base side edge 14 and narrow at the blade edge side, and is formed so as to be continuous with the locking long groove 7. Since the blade thickness is kept constant, the heating temperature can be increased on the blade edge side of the blade edge portion 3.

Figure 3A shows a female replaceable blade according to Embodiment 3, in which the thickness of the blade body is made thinner from the blade base side to the blade edge side.
Also in the cutting edge 3, as shown in the cutting edge side cross section AA and cutting edge side cross section BB in Figs.
is formed thinner than the blade thickness 15b on the blade base side, and the heating temperature can be increased.

Figure 4A shows a blade of No. 24 with a thin blade thickness as a female replaceable blade in Example 4, with the locking long groove 7 in the center of the blade and the long groove 16 extending to the cutting edge, while the cutting edge Cut groove 4b provided along section 3
The blade body is not divided by cutting, but the depth is left with a thin blade thickness, and the bending line 18 indicating the position to break off the long groove edge 17 formed inside the cut groove 4 after the cutting process is sharpened. Form. The cross section of the cutting edge edge 3 with the notch of the cutting groove 4b and the long groove edge 17 cut off is shown in FIG. In this case, since the blades have the same width along the edge 3 of the blade to be separated, the heating conditions will also be the same.

Figure 5 shows knife replacement blade 1 with knife handle M attached.
As an example illustrating this, the locking long groove 7 of the scalpel replaceable blade 1 engaged with the locking part K of the scalpel handle M is connected to the blade base edge 10.
is covered with the locking part K of the scalpel handle M, the terminals 11 and 12 of the conduction circuit are joined, and a protective tube P is provided that is covered with an insulator from the outside, and the rear end part 9 of the knife blade 1 is The female handle M is formed into a protective sleeve that can be slid forward and backward, and a power cord W attached to the distal end E of the female handle M formed of an insulator is connected to the protective tube P along the handle handle H. , handle H
The electric heating means is constructed by connecting the terminals 11 and 12 of the female replaceable blade 1 from the locking part K, which is supported by fitting the base thereof. Regarding these joining means, the scalpel handle M is equipped with sufficient insulation means, and since the voltage (for example, 1.5V) that is extremely lower than the safe voltage specified by safety regulations is applied, it will not cause any harm to the human body. Not at all.

In addition, according to the results of the energization test of Example 1,
The temperature of the cutting edge after applying 8A DC current is approx., excluding the rear part of the blade.
It showed 345° or more and 454° or less, and did not change even after 3 minutes had passed. In addition, the results of an energization test using the female replaceable blade of Example 4 show that when DC 5A is applied, the temperature of the edge 3 of the blade, excluding the tip 2 of the blade body, is approximately
It showed 302° or more and 343° or less, and did not change even after 2 minutes had passed after electricity was applied. The female spare blade used a blade body made of stainless steel material.

Further, the power source connected as the electric heating means may be either direct current, low frequency, or high frequency. The means for adjusting the heating temperature is a built-in temperature adjustment means that incorporates an IC or the like in the handle of the scalpel handle, similar to a soldering iron. Therefore, it may be changed at any time.

[Effect of idea]

Since this invention has the above configuration, it has the following advantages.

(1) The standard surgical scalpel blade itself can be energized to electrically heat the cutting edge, thereby achieving both cutting and hemostasis effects at the desired heating temperature.

(2) An advantage of the scalpel blade is that it is designed to be easily replaced with the scalpel handle, so it can maintain its sharpness and ensure safety and hygiene.

(3) Therefore, since the blade body of a regular scalpel blade can be used, it is possible to provide a cheap and good product that is easy to use for the operator and easy to manufacture for the manufacturer.

[Brief explanation of drawings]

Fig. 1 is an enlarged front view of Embodiment 1 of the female replaceable blade of this invention, Fig. 2 is an enlarged front view of Embodiment 2,
Fig. 3 A is an enlarged front view of Embodiment 3, B is a sectional view AA of Fig. A, C is a BB sectional view of Fig. 3,
FIG. 4A is an enlarged front view of the fourth embodiment, FIG. 4A is a CC sectional view of FIG. Explanation of the symbols of the main parts, 1... Female spare blade, 2...
...Tip of the blade, 3... Cutting edge, 4... Cutting groove, 7... Long locking groove, 9... Rear end of the blade, 11
...Terminal (blade edge side), 12...Terminal (blade ridge side).

Claims (1)

[Scope of utility model registration request] Except for the tip 2 of the plate-shaped blade, a long locking groove 7 is provided in the blade that is continuous with the cut groove 4 that separates the cutting edge 3 from the blade, and is folded back at the tip 2 to form a conductive path. A female replaceable blade characterized in that both ends of the locking long groove 7 of the blade body which opens at the rear end part 9 of the blade body are joined to electric heating means having terminals 11 and 12.