JPS61149135A - Ultrasonic incisor for living body tissue - 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 [Technical Field of the Invention] The present invention relates to an ultrasonic ablation device for removing living tissue such as cartilage tissue formed within a body cavity.

[Technical background of the invention and its problems] ``Conventionally,
Ultrasonic vibrations are used to destroy calculus in body cavities, remove tartar, or remove living tissue.

For example, in the ultrasonic ablation device disclosed in Japanese Patent Publication No. 47-39197, the tip of the treatment rod to which ultrasonic vibrations are applied is formed sharply. It is designed to take pictures and remove living tissue.

Further, US Pat. No. 3,792,701 discloses a device in which a stone or the like in a body cavity is pinched, and ultrasonic vibrations are applied to the stone while the stone is sandwiched, thereby destroying the stone.

However, in the ultrasonic ablation devices shown in each of these conventional examples,
For example, when attempting to remove cartilage tissue that has formed within a joint cavity, the former cutting means cannot capture the cartilage tissue to be removed - and the latter gripping means is extremely slow. .

[Object of the Invention] The present invention has been made in view of these circumstances, and an object of the present invention is to provide an ultrasonic ablation device for living tissue that can extremely easily ablate cartilage tissue and the like.

[Summary of the Invention] In order to achieve the above object, an ultrasonic ablation device for living tissue according to the present invention includes a treatment rod inserted into a body cavity connected to a vibrator that vibrates ultrasonically, and a tip of the treatment rod. A cutting blade for removing tissue is provided on the cutting blade, and holding claws are formed on the cutting blade to fix the tissue portion.The holding claws fix the living tissue such as cartilage tissue while the living tissue is removed. It is something that is removed.

[Example] Hereinafter, an example of the present invention will be specifically described with reference to the drawings.

1 to 3 relate to the first embodiment of the present invention, in which FIG. 1 is a cross-sectional plan view of essential parts of an ultrasonic ablation device for living tissue, and FIG. 2 is an enlarged vertical cross-sectional view of section A in FIG. 1. , FIG. 3 is a schematic diagram showing the state of excision of living tissue.

In these figures, reference numeral 1 is a holding section, and this holding section 1
It consists of a casing 1a and a cap 1b screwed onto the tip of the casing 1a.

A camera element 3 is housed inside this casing 1a.

A horn 5 is connected to the tip of the vibrator 3. The vibrator 3 and the horn 5 are held within the casing 1a via an O-ring 4 so as to be able to move freely.

Further, the horn 5 is projected into the cap 1b, and the treatment rod 2 is attached to the projected tip. The base of the treatment rod 2 is supported by the cap 1b via an O-ring 4 so as to be able to vibrate slightly.

This treatment rod 2 has a hollow portion 2a formed therein.

This hollow portion 2a communicates with a suction hole 5a formed in the horn 5. This suction hole 5a passes through the camera element 3 and communicates with a connecting tube 3a protruding from the rear end.

This connecting pipe 3a is supported by the casing 1a via an O-ring 4. Moreover, this connecting pipe 3a is connected to the casing 1
It projects rearward from a and is connected via a tube 6 to a suction device (not shown). Note that the reference numeral 7 is an electric wire cord 7 connected to the vibrator 3.

Furthermore, a holding claw 2b is formed at the tip of the treatment rod 2. This holding claw 2b is composed of a pair of opposing claws 2c, 2c, and this claw 2C92cfl is cut out in a U-shape. This notched portion serves as a sharply ground cutting blade 2d.

Further, the tips of both claws 2C are acutely angled and slightly bent inward to facilitate grasping of cartilage tissue, etc.

Next, the operation of the ultrasonic ablation device for living tissue having the above configuration will be explained using an example in which cartilage tissue formed in a joint cavity of a knee is to be ablated.

First, a small hole is made by puncturing at a joint such as the knee. Then, the treatment rod 2 is inserted into the joint cavity through this small hole directly or via a trocar or the like.

Although not shown, an arthroscope is inserted into the joint cavity from another position.

The operator guides the treatment rod 2 to the cartilage tissue 10 within the joint cavity while observing the tip of the treatment rod 2 using an arthroscope. Then, the tip of the treatment rod 2 is pressed against this cartilage tissue 10, and the cartilage tissue 10 is held by a holding claw formed at the tip of the treatment rod 2.
It is gripped and fixed by the mutually opposing claws 2C of b.

Then, when the power switch is turned on, the vibrator 3 emits ultrasonic waves, and the suction device connected to the tube 6 is activated.

The ultrasonic vibrations from the vibrator 3 are amplified by the horn 5 and transmitted to the treatment rod 2, causing the treatment rod 2 to vibrate. As a result, the cutting blade 2d formed at the tip of the treatment rod 2 vibrates slightly back and forth or up and down and left and right, cutting or removing the cartilage tissue 10.

This excised or removed cartilage tissue piece passes through the hollow part 2a of the treatment rod 2 by the suction force from the suction device, and passes through the suction hole 5.
a. It is discharged to the outside through the tube 6.

Of course, this operation is performed under arthroscopic observation.

Further, FIG. 4 is a side view of a treatment rod of an ultrasonic ablation device according to a second embodiment of the present invention.

The tip of this treatment rod 2 is curved. When the treatment rod 2 is rotated, the tip thereof moves on the circumference centered on the base of the treatment rod 2, so that the range in which living tissue can be excised or removed becomes wider.

Further, FIG. 5 is a plan view of a treatment frame of an ultrasonic ablation device according to a third embodiment, and FIG. 6 is a side view thereof.

The holding claw 11b of this treatment frame 2 is formed into a hook shape at its tip. The rearwardly facing end surface of this holding claw 11b is sharply ground to form a cutting blade 11d. Further, a notch 1 is provided at the rear of the holding claw 11b of this treatment frame 2.
1 is formed.

When excising or removing cartilage tissue, use the holding claw 1
After pressing 1b into the tissue, when the treatment frame 2 is slightly vibrated by the vibration from the vibrator 3 (see Fig. 1),
The above tissue is gradually excised by the cutting blade 11d or removed by the holding claw 11b. The removed section is sucked rearward from the notch 11 through the hollow part 2a of the treatment frame 2, and is discharged to the outside.

Further, FIG. 7 is a plan view of a treatment frame of an ultrasonic ablation device according to a fourth embodiment, and FIG. 8 is a cross-sectional side view thereof.

The holding claw 12b formed at the distal end of the treatment frame 2 is formed in a ring shape that opens upward and downward, and one distal end surface thereof is a sharply ground cutting blade 12d.

By pressing or biting the excision blade 11d at the tip of the ring-shaped holding claw 12b into the cartilage tissue and slightly moving the treatment frame 2, the tissue is gradually excised or removed, and the section is Hollow part 2 exposed to holding claw 12b
a is sucked backwards and discharged to the outside.

Although the treatment frame 2 according to the illustrated embodiment has a hollow portion 2a, the treatment frame 2 may be a solid rod. In this case, it is preferable to separately insert a suction tool into the body cavity to discharge the excised or removed section.

Further, the ultrasonic ablation device according to the present invention can be applied to ablation or removal of tissues not only in joint cavities but also in other body cavities.

[Effects of the Invention] As explained above, according to the present invention, a treatment frame inserted into a body cavity is connected to a vibrator that vibrates ultrasonically,
Since a cutting blade for removing tissue is provided at the tip of this treatment frame, the tissue can be easily cut or removed by pressing or biting the cutting blade against the tissue and slightly vibrating the treatment frame. Ru.

In addition, this resection blade is formed with a holding claw for fixing the above-mentioned tissue, so for example, when cutting or removing cartilage tissue formed in a joint cavity, this cartilage tissue can be fixed. This allows the surgery to proceed extremely efficiently.

[Brief explanation of the drawing]

1 to 3 relate to the first embodiment of the present invention, in which FIG. 1 is a cross-sectional plan view of essential parts of an ultrasonic ablation device for living tissue, and FIG. 2 is an enlarged vertical cross-sectional view of section A in FIG. 1. , FIG. 3 is a schematic diagram showing the state of excision of living tissue, FIG. 4 is a side view of the treatment frame of the ultrasonic ablation device according to the second example, and FIG. 5 is a treatment diagram of the ultrasonic ablation device according to the third example. FIG. 6 is a plan view of the frame, FIG. 6 is a side view thereof, FIG. 7 is a plan view of the treatment frame of the ultrasonic ablation device according to the fourth embodiment, and FIG. 8 is a cross-sectional side view thereof. 2... Treatment frame 2b, 11b, 12b... Holding claws 2d, 11d, 12d... Cutting blade 3... Vibrator 1o... Living tissue Fig. 1 Fig. 2 1b10 h Fig. 4 Figure 8

Claims (1)

[Claims] A treatment rod inserted into the body cavity is connected to the ultrasonic vibrating transducer, and a cutting blade for removing tissue is provided at the tip of the treatment rod, and the tissue portion is fixed to the cutting blade. An ultrasonic cutting device for living tissue, characterized in that a holding claw is formed.