JP2709724B2 - Vascular hemostatic coagulation device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vascular coagulation device for stopping bleeding from blood vessels during neurosurgery, orthopedic surgery and general surgery.

[Conventional technology and its problems]

Conventionally used bipolar hemostatic coagulation devices rely on high-frequency currents, and spark-gap type devices using a high-frequency generation in a frequency range of 1.5 to 2 MHz are often used. These bipolar electrodes are provided at both ends of the armature, both active and inactive, which are held by hand, energizing only the living tissue sandwiched between the tips of the armature, allowing the electrical invasion of the patient to coagulate. The bleeding from the blood vessels can be completely stopped without damaging other tissues. That is, hemostasis is performed by coagulation of blood vessels by local heating caused by high-frequency current flowing through living tissue.

However, most of the materials used in the past have been made of stainless steel, and recently, titanium materials which are lightweight and have corrosion resistance have also been made. These metal cores have high thermal conductivity and tend to conduct heat easily. As a result, the heat of the locally heated blood vessel is transferred to the metal concentric on the contrary, and the temperature of the concentric tip gradually increases as it is used. Is attached to the tip of the centrifuge. As a result of this adhesive force being larger than the coagulation force between blood vessels, after coagulating blood vessels,
In many cases, even the coagulated part of the blood vessel is peeled off and removed, and the blood vessel is opened again, and there is a disadvantage that hemostasis fails. In addition, it is necessary to sharpen off the adhered matter on the contact part (electrode) surface in preparation for the next use, so that the sharpening, the change in the shape of the tip of the centrifuge due to polishing, and the decrease in accuracy are large. It was a problem.

[Means for solving the problem]

To solve the above problems, the most effective means
By providing an electrically insulating sintered body having low thermal conductivity, such as zirconia, which does not scorch or adhere to a living body, and exposing electrodes from the insulating sintered body at the holding portion at the tip of the armature. This prevents the temperature from dropping and prevents the heat from the blood vessels from being transmitted to the tip of the concession, thereby providing a reliable hemostatic action.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the overall configuration of a bipolar type blood vessel hemostatic coagulation apparatus, wherein 1 is a settler for clamping and coagulating blood vessels for hemostasis, and the tip A of the settler 1 is shown enlarged in FIG. A vessel clamping member made of metal such as stainless steel or titanium
The inner surfaces of the blood vessel clamping members 10, 10, that is, the contact portions 10a, 10a actually contacting the blood vessel B are made of an electrically insulating sintered body. The metal exposed electrodes 10b connected to the blood vessel clamps 10, 10 are exposed in the portions 10a, 10a. Reference numeral 2 denotes a power supply device for generating a high-frequency current. The power supply device 2 energizes the armature 1 to which the cord 4 is connected by stepping on the foot switch 3.
ON and OFF.

By the way, insulating contact portions 10a, 10a are attached to the vessel clamping members 10, 10 by a method such as brazing, and the contact portions 10a, 10a are made of a sintered body made of electrically insulating zirconia. (Ceramics), and these sintered bodies are materials having high corrosion resistance and extremely high hardness.

For example, the thermal conductivity of zirconia sintered body is 0.009cal at 20 ℃
・ Cm / cm ²・ sec ・ ℃, stainless steel 0.039 cal ・ cm /
cm ² · sec · ℃, than ^{0.04cal · cm / cm 2 · sec} · ℃ titanium has a much smaller value, heat conductivity as compared with the metal material is small. Therefore, the metal exposed electrode 10b,
The heat generated by the high-frequency current flowing from 10b to the blood vessel is transmitted through the abutting portions 10a, 10a made of a sintered body, and the degree of heat dissipation is extremely small. It does not stick to the surface of 10a, 10a.

The surfaces of the contact portions 10a, 10a need to be polished to a mirror surface having a surface roughness of better than 1 Rs in consideration of the easiness of peeling of the burnt deposits. Further, stainless steel hardness zirconia Vickers hardness 1250 kg / mm ² or more, the contact portion 10a does not compare compared with the metal material as because high hardness of such a sintered body made of titanium, the vessel 10a Even in the case where a part of the tissue is strongly burned, it is possible to easily scrape off the deposit without damaging the contact surface by rubbing with a knife edge or the like.

〔The invention's effect〕

As described above, the bipolar vascular hemostasis and coagulation device provided with a centrifuge according to the present invention has the following effects.

Since the hemostasis operation during the operation can be performed reliably, the operation time can be significantly reduced.

The amount of bleeding can be reduced, and the surgical invasion can be reduced for the patient.

Not only is the work of scraping off the adhered matter sticking to the tip of the armature unnecessary, but also in the event that it adheres, it can be easily scraped off, and because of its high hardness, there is no risk of shape change and high accuracy It can be maintained for a long time.

[Brief description of the drawings]

FIG. 1 is a view showing the overall configuration of a vascular hemostatic coagulation apparatus according to the present invention, and FIG. 2 is an enlarged perspective view of a portion A in FIG. 1: armature, 2: power supply, 3: footswitch, 4: cord, 1
0: blood vessel clamping member, 10a: contact part, 10b: metal exposed electrode

Claims (1)

(57) [Claims] 1. A bipolar coagulation device which is connected to a power supply so that a high-frequency current flows between two sets of blood vessels, cauterizes and coagulates blood vessels sandwiched between the two sets of blood vessels. A blood vessel hemostatic coagulation apparatus comprising: an electrically insulating sintered body disposed at a contacting portion of a blood vessel; and a plurality of electrodes exposed on the surface of the electrically insulating sintered body.