JPS62127045A - Surgical instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a surgical instrument capable of heating and coagulating tissue to stop bleeding while incising living tissue.

[Problems to be solved by conventional techniques and inventions] Conventionally,
Various surgical instruments have been proposed that can heat and coagulate living tissue after incision to stop bleeding.

Such surgical instruments include, for example, U.S. Pat.
As shown in No. 231.371, a heating element with negative resistance temperature characteristics is installed near the tip of a surgical scalpel, thereby heating the tip of the scalpel and making it possible to stop bleeding while cutting living tissue. .

However, this device requires a complicated circuit to control the temperature and has a complicated structure.

In addition, there is a device that can incise living tissue and stop bleeding by passing a high-frequency current between an electric scalpel consisting of an electrode and a grounding plate that is in contact with the body skin, and using the Joule heat generated from the electrode of the electric scalpel. . However, since this device sends a high-frequency current through the body, the high-frequency current causes a stretch reflex in the patient, which may cause the patient to cut into the tissue more than necessary.

Additionally, non-contact laser scalpels are being put into practical use in recent years. This method involves irradiating living tissue with a laser beam to incise the tissue and coagulate blood at the same time to stop bleeding.

However, this device has problems in that it requires skill to illuminate the laser beam and is expensive.

Furthermore, as shown in Japanese Patent Publication No. 60-455291, a laser beam emitting surface with a cloudy finish is provided at the tip of the surgical instrument, and the tissue is irradiated with laser light from this emitting surface to coagulate and stop bleeding at the same time as incision. There are also surgical instruments that can do this.

However, this device also has problems in that it has a complicated structure and is expensive.

[Objective of the Invention] The present invention has been made in view of these circumstances, and is capable of heating the tissue and stopping bleeding while incising the living tissue.The heating element itself can form the edge member, and the structure is The objective is to provide a safe surgical instrument that is simple, low-cost, does not require a temperature control circuit because the heating element itself can control the temperature, and does not flow high-frequency current into the body. .

[Means and effects for solving the problem 1) According to the present invention, the instrument for 1 is a surgical instrument provided with an edge member having a sharp tip and a gripping member for holding and fixing the edge member, At least a part of the edge member is formed of a positive temperature reamister as a constant temperature heating element that generates heat at 1° by electrical means.

That is, there is a device "C" in which living tissue is incised by the sharp tip of the edge member, and at the same time the edge member is heated by a positive temperature coefficient thermistor, and the edge member heats and coagulates the tissue after the incision, thereby stopping bleeding.

[Embodiments of the invention] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIGS. 1(a) and (b) relate to the first embodiment of the present invention,
FIG. 1(a) is a front view of the surgical scalpel, and FIG. 1(b) is a sectional view taken along the line A-A'' in FIG. 1(a).

This embodiment is an example in which the present invention is applied to a surgical scalpel.

The surgical scalpel 1 of this embodiment has an edge member 2 with a sharp tip.
and a gripping member 3 for holding and fixing the edge member 2.

The edge member 2, as shown in FIG. 1(b),
A positive temperature thermistor with one end shaped like a sharp female blade.
effi-Cient thermistor; hereinafter abbreviated as PTC element. ) 4, electrodes 5.6 attached to both sides of the PTC element 4, and an insulating coating 7 provided to cover the outer periphery of the PTC element 4 and the electrodes 5.6. .

A power source 8 is installed inside the gripping member 3, and a switch 9 is provided at one end of the outer surface of the gripping member 3.

The power source 8 and the electrodes 5.6 of the PTC element 4 are electrically connected via a switch 9 and a cable 10 inserted into the gripping member 3.

The PTC element 4 is a thermistor having a positive resistance-temperature characteristic, and the PTC element itself has an automatic temperature control function, and is used as a constant temperature heating element in the present invention.

In addition, since the PTCi element 4 is made of a highly hard ceramic whose main component is barium titanate, by processing one end into a sharp female shape as in this embodiment, the edge member 2 can be pressed by the PTC element 4 itself. can be formed.

In general, by changing the material composition of the PTC element, the PTC element 4 can be heated to a temperature suitable for hemostasis depending on the type and condition of the living tissue.

Next, the operation of the surgical scalpel 1 configured as above will be explained.

First, the switch 9 provided on the outer surface of the gripping member 3 is closed, and the power supply 8 energizes the PTCM element 4 inside the edge member 2 . By being energized, the PTC element 4 generates heat, and the PTC
The temperature is maintained at a constant level by the element's own temperature control function. P
As the TC element 4 generates heat, the edge member 2 is maintained at a temperature suitable for coagulating the living tissue and stopping bleeding.

In this state, the living tissue is incised using the sharp tip of the edge member 2 of the surgical scalpel 1. The surface of the incised biological tissue is heated by the edge member 2 heated by the PTC cord 4 to cause minimal coagulation, thereby stopping bleeding.

As described above, by using the surgical scalpel 1 of this embodiment, it is possible to incise living tissue and to stop bleeding in the incised tissue.

In this embodiment, a power supply 8 for energizing the PTC element 4 and a switch 9 for energizing and releasing the PTC element 4 are provided on the gripping member 3, but a power supply control section having a power supply, a switch, etc. is provided in the grip member 3. Provided outside the surgical scalpel 1, the power supply vJ
The ilt part and the electrodes 5.6 of the PTC element 4 may be connected by a cable inserted into the gripping member 3.

FIG. 2 is a sectional view of an edge member in a surgical scalpel according to a second embodiment of the present invention.

This embodiment is also an example in which the present invention is applied to a surgical scalpel.

In this embodiment, the edge member 11 having the sharp tip of the edge member 2 is made of an extra length, and the other parts of the edge member 2 are made of the PTC element 4 as in the first embodiment. As in the first embodiment, electrodes 5 and 6 are attached to both sides of the PTC element 4, and an insulating coating 7 is provided around the outer periphery of the PTC element 4 and the electrodes 5 and 6. Other functions and effects are similar to those of the first embodiment.

FIG. 3 is a sectional view of an edge member in a knife for 4) according to the third embodiment of the present invention.

In this embodiment, similarly to the second embodiment, in the surgical knife 1, the edge member 11 of the edge member 2 is made of metal, and the other parts of the edge member 2 are made of the PTC element 4. 5.6 is attached to both end surfaces of the PTC element 4 in the vertical direction. Other functions and effects are similar to those of the first embodiment.

FIG. 4 is a sectional view of an edge member in a surgical scalpel according to a fourth embodiment of the present invention.

In this embodiment, as in the first embodiment, the edge member 2 of the surgical scalpel 1 is constituted by a PTC element 4, and electrodes 5 and 6 are attached to both sides of the PTC element 4.
The outer peripheries of the electrodes 5 and 6 are coated with Teflon or the like to form a non-adhesive layer 12.

In this example, this non-stick 1! ! 1112 prevents living tissue from adhering to the edge member 2. This can prevent living tissue from adhering to the edge member 2, causing the hemostasis-stopped tissue to peel off and cause re-bleeding. The non-adhesive layer 12 also has the function of insulating the PTC element 4 and the electrodes 5.6. Other functions and effects are similar to those of the first embodiment.

Note that applying a non-adhesive coating to the outer periphery of the edge member 2 as in this embodiment can also be applied to the second and third embodiments.

In the above embodiments, the present invention is applied to a surgical scalpel as a surgical instrument, but the present invention can also be applied to other surgical instruments such as scissors and tweezers.

[Effects of the Invention] As described above, according to the present invention, in a surgical instrument provided with an edge member having a sharp tip and a gripping member for holding and fixing the edge member, at least one of the edge members The part is formed of a positive temperature coefficient thermistor as a constant temperature heating element that generates heat by electrical means.By using this surgical instrument, while incising living tissue, the tissue after the incision is heated to stop bleeding. be able to.

Moreover, since the heating element itself has high hardness, the heating element itself can form an edge member with a long life, and the structure is simple and low cost.

Furthermore, the heating element itself can control the temperature, and as a result, no temperature control circuit is required.

Furthermore, since no high-frequency current or the like is passed inside the body, bleeding can be safely stopped.

Further, by applying a non-adhesive coating to the outer periphery of the edge member, it is possible to prevent the tissue after the incision from adhering to the edge member and the tissue that has been stopped from bleeding to separate and cause re-bleeding.

[Brief explanation of drawings]

FIGS. 1(a) and (b) relate to the first embodiment of the present invention,
FIG. 1(a) is a front view of a surgical scalpel, FIG. 1(b) is a sectional view taken along the line A-A'' in FIG. 1(a), and FIG. 2 is a surgical scalpel according to a second embodiment of the present invention. FIG. 3 is a cross-sectional view of the edge member at J3 of the surgical scalpel according to the third embodiment of the present invention, and FIG. 4 is a cross-sectional view of the edge member of the surgical scalpel according to the fourth embodiment of the present invention. [It is a sectional view of the pulling edge member. 1... Surgical scalpel 2... Edge member 3... Gripping member 4... PTC cord 5.6... Electrode
7... Insulating coating 8... Power supply 9... Switch 10... Cable 11... Edge portion 12
...Non-adhesive layer Figure 1 (0) 9 Sui Tuna Figure 1 (b)

Claims (2)

[Claims] (1) A surgical instrument provided with an edge member having a sharp tip and a gripping member for holding and fixing the edge member,
A surgical instrument characterized in that at least a portion of the edge member is formed of a positive temperature coefficient thermistor as a constant temperature heating element that generates heat by electrical means. (2) The surgical instrument according to claim 1, wherein a non-adhesive coating is applied to the outer periphery of the edge member.