JP2604614B2 - Vascular hemostatic coagulation device - Google Patents

Description

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

[Conventional technology and its problems]

The bipolar hemostatic coagulation apparatus conventionally used is based on a high-frequency current, the frequency used is in the range of 1.5 to 2 MHz, and a spark gap type is often used as a high-frequency generation method. This bipolar electrode is the both ends of the hand held by both the active and inactive electrodes, and it is necessary to energize only the living tissue sandwiched between the tips of the armature and coagulate the electrical invasion to the patient It is limited to a local area and can completely stop bleeding from blood vessels without disturbing other tissues. That is, the hemostatic action causes a high frequency current to flow through the tissue,
This is performed by stopping blood in the blood vessel by local heating and by hemostatic coagulation of the blood vessel.

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-made sets have high thermal conductivity and tend to transfer heat easily. Therefore, the heat of the locally heated blood vessel is transferred to the metal centrifuge in reverse, and as the tip of the centrifuge is used, the temperature gradually increases, causing scorching between both the metal and the blood vessel at the tip of the centrifuge. Then, a part of the blood vessel is attached to the tip of the centrifuge. As a result of this adhesive force being larger than the coagulation force between the blood vessels, when the blood vessel is coagulated and the tip of the centrifuge is opened, the coagulated portion of the blood vessel is often peeled off and removed. There was a problem that it opened and failed to stop bleeding. In addition, it is necessary to sharpen and remove the burnt deposits for the next use, and the shaving, the change in the shape of the tip of the centrifuge due to polishing, the reduction in accuracy, and the like are also serious problems.

[Means for solving the problem]

To solve the above problems, the most effective means
Ceramics with conductivity that does not cause the living body to be scorched or adhered to the holding part at the tip of the centripetal, and small thermal conductivity,
By using a material such as cermet or carbide, it is possible to prevent a decrease in temperature, prevent heat from blood vessels from being transmitted to the tip of the concession, and provide a reliable hemostatic effect.

〔Example〕

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

FIG. 1 is a diagram showing the overall configuration of a bipolar blood vessel hemostasis coagulation apparatus, wherein 1 is a centrifuge for holding and coagulating blood vessels for hemostasis, and the tip A of the centrifuge 1 is shown in an enlarged scale in FIG. As described above, the blood vessel clamping portions 10, 10 are composed of a pair of electrodes, and the inner surfaces of the blood vessel clamping portions 10, 10, ie, the portions 10a, 10a actually in contact with the blood vessel B, are made of a conductive sintered body. I have. Also,
Reference numeral 2 denotes a power supply for generating a high-frequency current. The power supply 2 turns on and off the power supply to the armature 1 connected by the cord 4 by stepping on the foot switch 3.

By the way, conductive contact portions 10a, 10a are attached to the blood vessel holding portions 10, 10 by a method such as brazing. The contact portions 10a, 10a are made of conductive titanium nitride (TiN). It is composed of a sintered body of a metal compound such as titanium carbide (TiC), zirconium boride (ZrB ₂ ), cermet, and super hard (WC). These sintered bodies are electrically conductive, have great corrosion resistance, and are extremely hard. The thermal conductivity of stainless steel is 0.039cat / cmsec
・ ℃, 0.04cat / cm ・ sec ・ ℃ for titanium,
The heat conductivity of the titania-based sintered body is smaller than that of the above metal materials, such as 0.009 cat / cm · sec · ° C. Therefore, the heat generated by the flow of the high-frequency current through the blood vessel is transmitted to the abutting portions 10a, 10a made of a sintered body, and the degree of heat dissipation is small, and a part of the cauterized blood vessel tissue does not burn.

Also, the surfaces of the contact portions 10a, 10a need to be polished to a mirror surface better than 1 s in consideration of the releasability of burnt deposits.

In addition, the hardness of the sintered body is titania-based and the Vickers hardness is 68.
0 kg / mm ² or more in the conventional stainless steel, firmly abutting portion 10a, the deposits were burnt vessel 10a it does not compare to the metallic material as because of its high hardness of such a sintered body made of titanium Even if it adheres to the surface, the adhered substance can be scraped off without damaging the surface of the contacting portion by squeezing it 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 does the work of shaving off the sticking sticking to the tip of the armature not only break away, but also in the event that it sticks, it can be easily peeled off, and because of its high hardness, there is no risk of shape change and high accuracy can be maintained for a long time Can be maintained over 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 a partially enlarged perspective view of a portion A in FIG. 1: armature, 2: power supply unit 3: foot switch, 4: cord 10: blood vessel holding part, 10a: contact part

Claims (1)

(57) [Claims] 1. A bipolar coagulation device in which a high-frequency current flows from one of two armatures to the other from a power supply device to cauterize and coagulate blood vessels sandwiched between the two armatures to stop the blood.
A blood vessel hemostasis and coagulation device, characterized in that at least the blood vessel holding portion of the above-mentioned concession that comes into contact with a blood vessel is formed of a sintered body of a metal compound having conductivity.