JPH0332339Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a handpiece for a surgical ultrasonic scalpel for crushing or cutting and separating biological tissue by ultrasonic vibration.

[Conventional technology]

Surgical tools that utilize the ability to cut, cut, or crush living tissue using ultrasound include tools for cutting bones and joints and cancer cells in the fields of orthopedics and general surgery, and tools for cataract surgery in the ophthalmology field. Furthermore, in dentistry, ultrasonic surgery for removing tartar and the like have been put into practical use.

These ultrasonic surgical tools basically consist of an ultrasonic vibration source that converts high-frequency current into ultrasonic vibration;
It consists of a joint that is connected to the vibration source and amplifies and transmits ultrasonic vibrations, and a tip, and the tip comes into contact with living tissue to crush or cut it. Furthermore, depending on the purpose of use, there is an irrigation mechanism that supplies irrigation fluid (washing fluid) such as physiological saline to the area around the surgical site to clean it, or a mechanism that suctions crushed and emulsified cell debris.
Equipped with a suction mechanism for removal.

The inventors of the present invention previously developed a handpiece that can generate power with the amplitude of ultrasonic vibration that can demonstrate sufficient tissue disruption ability in a wide range of areas of living tissue, an ultrasonic oscillation circuit, and a device that can clean and disrupt the area around the surgical site. Invented an ultrasonic scalpel consisting of a system for suctioning and removing emulsified cell debris.
It was disclosed in Publication No. 58034. However, with this handpiece, when the surgical site is relatively close to the body surface or when the surgical method allows for a wide surgical field, it is possible to proceed with the surgery effectively without any hindrance. If the surgical field is deep within the body and the surgical field is extremely narrow, a very difficult surgery is required, which poses a problem in performing an appropriate and accurate surgery.

In order to improve these problems, the present inventors invented a handpiece with a bent joint that transmits ultrasonic vibration source or ultrasonic vibration to the tip working part, and published Japanese Patent Application Laid-Open No. 60-236638. Disclosed in the official bulletin.

A handpiece having a bent joint will be described in detail below with reference to FIG. This handpiece includes a cable 30 connected to an ultrasonic oscillator, a connector 31, a grip 32, and a protective tube 3.
3. Although not shown, an ultrasonic vibration source which is an ultrasonic vibration source, a bent joint 34, a tip 35 which is an ultrasonic scalpel part, an irrigation pipe 36 which supplies physiological saline etc. to the surgical site, and this irrigation It consists of a holder 37 for fixing the surgical pipe 36 close to the tip 35, and a suction pipe 38 for suctioning and removing liquid substances from the surgical site. The connecting tube 39 is a pipe that mechanically connects the grip portion 32 and the protective tube 33 with a screw or the like.

A suction hole 40 is provided in the tip 35, which serves as the ultrasonic scalpel part, for suctioning and removing blood and emulsified cells generated at the surgical site, and a suction hole 40 is provided on the outside of the protective tube 33 using an appropriate method. It is connected to the suction pipe 38 via a pipe joint 41 connected at . The other end of the suction pipe has a suction nipple 42 connected to the suction tube. Also,
The irrigation pipe 36 is connected to the pipe joint 41 in an appropriate manner. The tip of the irrigation pipe 36 has an open end near the tip of the tip, and is fixed in close proximity to the tip 35 by a holder 37. An irrigation nipple 43 is attached to the other end of the irrigation pipe 36 and is connected to the irrigation tube 4. The pipe stopper 44 is a stopper that fixes the suction pipe 38 and the irrigation pipe 36 to the grip portion 32.

However, in this handpiece, the joint 34 and tip 35, which are part of the ultrasonic vibrating part, are bent, so if a cover is provided to cover the ultrasonic vibrating part, the centering of the ultrasonic vibrating part and the cover will be difficult. I had a difficult problem. Therefore, the entire joint 34 and tip 35 are exposed, and if the surgical target area is deep within the body and the surgical field is extremely narrow, the joint 34 and tip 35 may be exposed.
There is a risk that the ultrasonic vibrating part may come into contact with normal tissue other than the affected area and injure the normal tissue, and it is quite difficult to perform surgery without bringing the ultrasonic vibrating part into contact with normal tissue.

[Purpose of the invention] The purpose of this invention is to solve the above-mentioned problems of a surgical tool that uses ultrasonic vibration, that is, a handpiece for an ultrasonic scalpel. By devising a cover that is removable and easy to center, the ultrasonic vibration part except the tip working part is covered with a cover.
The objective is to provide a handpiece that can perform accurate surgery without damaging normal tissue.

[Structure of the idea]

That is, the present invention is a surgical handpiece having a bending part for crushing, cutting, or separating biological tissue by ultrasonic vibration, and a vibrating part that amplifies and transmits ultrasonic vibration to a distal working part. This handpiece is covered with a tip cover and a bellows cover having a bellows part via an O-ring.

The present invention will be explained in some detail below based on the drawings.

FIG. 1 is an overall view showing the external appearance of a hand piece in which an irrigation tube is set as an embodiment of the present invention, and FIG. 2 is a view showing the internal structure of the hand piece. The basic structure of this handpiece is almost the same as the conventional handpiece shown in FIG.
The transducer 10, which has a more basic structure and is an ultrasonic vibration source, is fixed to the transducer holding cover 3 by an appropriate method such as screwing or gluing at the flange portion 13, which serves as an amplitude mode node, and then The transducer nipple 15 and a portion of the suction nipple 6 are covered with a transducer cover 2 and a lid 7.

Furthermore, a chip cover 5 is placed over a part of the front part of the chip 12 and the bending joint 11, and the remaining part of the rear side of the bending joint 11 and the vibrator 1 are covered with a chip cover 5.
A bellows cover 4 is placed over a part of the front side of the handpiece, and an irrigation tube 8 for supplying irrigation fluid such as physiological saline to the surgical site is fixed to the side of the handpiece with a clip 9. .
The irrigation tube 8 is introduced into the tip cover 5 through a tube hole 16 made in the tip cover 5, and has an open end near the tip of the tip 12. Also, chip 12, bending joint 1
1 and the vibrator 10 are connected through a through hole,
A suction hole 14 is configured to suction and discharge crushed and emulsified tissue, blood, irrigation liquid, etc. The vibrator nipple 15 and the suction nipple 6 are connected by a tube made of silicone rubber, fluorine rubber, etc., and absorb ultrasonic vibrations.

FIGS. 3 and 4 are sectional views showing an embodiment of the bellows cover 4 and the tip cover of the present invention, respectively. First, the bellows cover 4 is attached to the front end of the vibrator holding cover 3 so that the bellows part 20 covers the bending part 16 of the bending joint 11, and then the tip cover 5 is placed over the tip 12, and the front end of the bellows cover 4 is attached to the front end of the bellows cover 4. 22 and the rear end portion 24 of the tip cover 5 is fitted to the tip cover 5. At this time, the bellows cover 4 can be freely bent according to the bending angle of the bending joint 11 by the action of the bellows part 20. Also, when assembling the O-ring groove 2 of the bellows cover 4 and tip cover 5,
By inserting an O-ring in each of 1 and 23, the bellows cover 4 and the tip cover 5,
Centering between the bending joint 11 and the chip 12 is possible, and the distance between them is kept constant. The length of the tip protruding from the tip of the tip cover 5 is 1.
~30 mm, preferably 5 to 15 mm is appropriate.

As the material for the bellows cover 4 in the present invention, a synthetic resin that has excellent heat resistance, abrasion resistance, etc., and has appropriate flexibility and rigidity is suitable, and fluorine resin is an example of such a material. You can, but
It is not limited to this. Furthermore, as the material for the tip cover 5, synthetic resins having excellent heat resistance, impact resistance, electrical insulation, rigidity, etc., such as engineering plastics such as polysulfone resins, are suitable.

[Effect of idea]

According to the present invention, it is possible to attach and detach the cover and the ultrasonic vibrating section of the handpiece as needed during use even for a surgical handpiece having a bending section, and it is easy to center the cover and the ultrasonic vibrating section of the handpiece. A handpiece cover that can maintain a constant spacing is obtained,
Even when the surgical field is extremely narrow due to being deep inside the body, we can provide a handpiece that can reliably remove only unnecessary tissue without the ultrasonic vibrating part contacting and damaging normal tissue, which is extremely useful. It is.

[Brief explanation of the drawing]

FIG. 1 is an overall view showing the external appearance of a handpiece in which an irrigation tube is set as an embodiment of the present invention, and FIG. 2 is a view showing the internal structure of FIG. 1. FIGS. 3 and 4 are cross-sectional views showing an embodiment of the bellows cover and tip cover of the present invention, respectively. Moreover, FIG. 5 shows the entire part of a conventional handpiece.

Claims (1)

[Claims for Utility Model Registration] (1) A surgical handpiece having a bending part for crushing, cutting, or separating biological tissue by ultrasonic vibration, which amplifies the ultrasonic vibration to the tip working part; A handpiece characterized in that a transmitting vibration part is covered with a tip cover and a bellows cover having a bellows part via an O-ring. (2) The handpiece according to claim 1, wherein the bellows cover having the bellows portion is made of fluororesin.