JPH01313048A - Surgical handpiece with variable injection pattern mechanism - 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 [Field of Industrial Application] The present invention relates to a surgical handpiece for performing incision, cleaning, etc. by jetting high-pressure fluid, and particularly to simplifying the control of jetting force.

[Prior Art] In recent years, in order to improve various surgical methods, research has been carried out on methods of using pressurized fluid jets for limited areas. Publication No. 5l-24013, Utility Model Publication No. 62-1360
Publication No. 4, Utility Model Publication No. 62-32009, Utility Model Publication No. 62
It is disclosed in Japanese Patent Application No.-32010.

In this method of using a pressurized fluid jet, by adjusting the pressure and injection amount within an appropriate range, it is possible to separate the fluid from the surrounding tissue without cutting the underlying material such as the vascular system. Instead, the loose tissue can be removed from the treatment area along with the sprayed fluid. The scope of its application is wide: it can be used for incision and cutting using high pressures such as <10 MPa, exfoliation using low pressures of IMPa or lower, and separation and cleaning of parenchymal cells and material in soft areas. can.

The greatest advantage of using a surgical handpiece in surgery is that as shown in FIG. As shown, the blood vessel 21 can be exposed while removing only the surrounding parenchyma 22 without damaging the blood vessel 21. When the parenchyma 22 around the blood vessel 21 is removed by injecting this pressurized fluid 20, the difference in strength between the blood vessel 21 and the parenchyma 22 is minute, so it is necessary to change the injection force of the pressurized fluid depending on the situation. There is.

Furthermore, when removing parenchyma around delicate blood vessels or nerves, the concept of showering is stronger than the concept of cutting, and in this case as well, it is necessary to change the jetting force of the pressurized fluid.

Conventionally, a method of controlling the ejection force of the pressurized fluid has been a common method of controlling the discharge pressure of the pressurized fluid.

[Problems to be Solved by the Invention] By controlling the discharge pressure of the conventional pressurized fluid 20, the pressurized fluid 20 injected from the handpiece nozzle portion 1 can be improved.
In the method of changing the ejection force of the pressurized fluid 20, it is necessary to adjust the ejection pressure of the pressurized fluid 20 according to the situation during surgery, and minute adjustments are not easy. If the jetting force is too strong and the pressurized fluid jet travels too straight, it will penetrate deep into the body, causing problems.

This invention has been made in order to improve such shortcomings, and an object of the present invention is to obtain a surgical handpiece equipped with a spray pattern variable mechanism that can easily change the spray pattern of a pressurized fluid jet. It is.

[Means for Solving the Problems] A surgical handpiece equipped with a variable injection pattern mechanism according to the present invention includes a suction pipe having a suction port at its tip and protruding from the handpiece body, and an orifice at the tip. a nozzle pipe disposed within the suction pipe;
a turbulence generator disposed upstream of the orifice of the nozzle pipe and whose position can be varied in the axial direction of the nozzle pipe;
The present invention is characterized in that it includes a position adjustment mechanism that is attached to the handpiece body and has one end connected to the turbulence generator to adjust the position of the turbulence generator.

[Operation] In this invention, by changing the position of the turbulence generator with respect to the orifice at the end of the nozzle pipe, the turbulence generation position within the nozzle pipe is changed, and the flow of the pressurized fluid flowing into the orifice is changed. , changing the spray pattern of the pressurized fluid. Therefore, the above problem can be solved.

[Embodiment] FIG. 1 is a longitudinal sectional side view showing the structure of an embodiment of the present invention. As shown in the figure, the handpiece nozzle section 1 includes a suction pipe 3 protruding from the handpiece body 2,
It consists of a nozzle pipe 4 disposed within a suction pipe 3. The suction pipe 3 has suction ports 5 on its tip surface and on the side of the tip.
, 6 are provided. The nozzle pipe 4 is fixed to the tip of the handpiece body 2 by a pipe holder 7, and has a through hole 9 therein communicating with a pressurized fluid passage 8 of the handpiece body 2. A nozzle tip 11 having an orifice 10 is provided at the tip of the nozzle pipe 4, and a turbulence generating section made of a wire bent as shown in FIG. A turbulence generator 13 having a tip 12 is disposed. This turbulence generator 13
The rear end portion is connected to a position adjustment mechanism 14 screwed into the handpiece body 2, and by operating the position adjustment mechanism 14, the turbulence generation part 12 of the turbulence generation body 13 is aligned with the nozzle pipe 4.
It is designed to move forward and backward inside the through hole 9. Note that in FIG. 1, valves and the like of the pressurized fluid passage 8 are omitted.

When pressurized fluid is sent to the surgical handpiece configured as described above, the pressurized fluid passing through the through hole 9 of the nozzle pipe 4 generates a turbulent flow I5 at the turbulent flow generating section 12 of the turbulent flow generator 13. .

Then, the position adjustment mechanism! 4 to open the turbulence generating section 12.
When the turbulent flow 15 is brought close to the nozzle tip 11 as shown in FIG.
is injected through the orifice 10 of. Therefore, the spray angle θ of the pressurized fluid 20 to be sprayed becomes large, the spray energy is dispersed, and the force applied to the surgical site is reduced.

Conversely, if the position adjustment mechanism 14 is operated to gradually move the turbulent flow generator 12 away from the nozzle tip 11, the injection angle θ of the pressurized fluid 20 injected from the orifice 10 will gradually become smaller, as shown in FIG. As shown, when the turbulent flow generator 12 is moved away from the nozzle tip 11, the turbulent flow 15 generated in the turbulent flow generator 12 is rectified again in the through hole 9 of the nozzle pipe 4, and becomes a laminar flow 16. When this laminar flow 16 is injected through the orifice 10, its injection angle θ becomes almost zero, resulting in a jet flow with high energy density, which imparts a large injection force to the surgical site.

Therefore, by simply changing the position of the turbulence generator 12 relative to the nozzle tip 11 while keeping the discharge pressure of the pressurized fluid 20 constant, it is possible to vary the jetting force from a weak jetting force used for cleaning etc. to a strong jetting force used for cutting etc. This allows for efficient surgery.

In the above embodiment, the case where the turbulence generation part +2 of the turbulence generation body 13 is formed by a bent wire rod is explained, but as shown in FIG. The turbulent flow generator 13 that formed the turbulence generator 12a and the fifth
Even if a plurality of diagonal grooves 16 are provided on the cylinder surface to form the turbulent flow generating section 12b as shown in the front view of FIG. be able to.

[Effects of the Invention] As explained above, the present invention provides a turbulence generator in the passage of the nozzle pipe and changes the position of the turbulence generator with respect to the orifice at the end of the nozzle pipe, thereby reducing the turbulence in the nozzle pipe. By changing the generation position and changing the flow of the pressurized fluid flowing into the orifice, the jet pattern of the pressurized fluid can be changed, so the jetting force of pressurized fluid can be adjusted accurately from weak jetting force to strong jetting force with simple operation. You can get a good deal.

Further, since the ejection force of the pressurized fluid ejected from the handpiece can be finely adjusted, the advantages of the handpiece can be further enhanced.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view showing the structure of an embodiment of the present invention, FIGS. 2 and 3 are partial sectional views showing the tip of the nozzle pipe of the above embodiment, and FIG. 4 is a diagram showing another embodiment. A side view showing the turbulence generator, FIGS. 5(a) and 5(b) show the turbulence generator according to the third embodiment, a) is a front view, and FIG. 6(b) is a side view. , FIG. 7, and FIG. 8 are explanatory diagrams each showing the operation of the handpiece. DESCRIPTION OF SYMBOLS 1...Handpiece nozzle part, 2...Handpiece body, 3...Suction pipe, 4...Nozzle pipe, 5
゜6... Suction port, 8... Pressurized fluid passage, 9... Through hole, 10... Orifice, 11... Nozzle tip,
12°+2a, 12b...Turbulence generator, 13...Turbulent flow generator, 14...Position adjustment mechanism. Agent Patent Attorney Masatoshi Sato

Claims (1)

[Claims] A surgical handpiece that injects high-flow fluid includes a suction pipe that has a suction port at its tip and protrudes from the handpiece body, and a nozzle pipe that has an orifice at its tip and is disposed within the suction pipe. , a turbulence generator disposed upstream of the orifice in the nozzle pipe and whose position can be varied in the axial direction of the nozzle pipe, and a turbulence generator attached to the handpiece body with one end connected to the turbulence generator to generate turbulent flow. A surgical handpiece equipped with a variable injection pattern mechanism, characterized by comprising a position adjustment mechanism for adjusting the position of a generator.