JPH0529695Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a surgical handpiece for performing incision, resection, cleaning, etc. by jetting fluid, and particularly to improving operability.

[Prior Art] In recent years, research has been conducted into methods of using pressurized fluid jets to limited areas in order to improve various surgical methods. Publication No. 61-24013,
It is disclosed in Utility Model Publication No. 62-13604, Utility Model Publication No. 62-32009, Utility Model Publication No. 62-32010, etc.

According to the method 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 cords such as the vascular system. Not only that, but free tissue can be removed from the treatment site along with the jet fluid. The range of application is wide, and it can be used for incision and cutting using high pressures such as 10MPa, peeling using low pressures of 1MPa or less, separating parenchymal cells and cords in flexible areas, and cleaning. can.

A method of using this pressurized fluid jet will be outlined with reference to FIG. As shown in the figure, the fluid pressurized by the pump 21 is sent to the handpiece 1 through the hose 23 when the switching valve 22 is in the open state. The pressurized fluid sent to the handpiece 1 passes through a nozzle within the handpiece 1 and is injected toward the surgical site. On the other hand, the suction device 24 is generally operated at all times, and suctions fluid from the surgical site and its surroundings via the suction hose 25.

FIG. 4 is a sectional view showing the tip of the surgical handpiece 1 disclosed in Japanese Utility Model Publication No. 62-32010. In the figure, 26 is a nozzle chip, and the nozzle chip 26 is provided with a needle-shaped needle part 27 extending in the downstream direction, and the needle part 27 has an injection hole 29 that communicates with a through hole 28 provided in the nozzle chip 26.
is drilled there. This nozzle tip 26 is attached to a nozzle cap 32 in a holder 31 attached to a grip part 30.
It is fixed by.

33 is a suction nozzle having a suction hole 34 provided surrounding the outer periphery of the needle portion 27, and the suction nozzle 33 is connected to the suction hose 25 by a suction pipe 35.
is connected to.

When pressurized fluid is sent from the pump 21 to the surgical handpiece 1 configured as described above, the pressurized fluid passes through the through hole 28 of the nozzle tip 26 and is injected from the orifice 36. This injected high-pressure fluid is sent to the surgical site through the injection hole 29 of the needle portion 27. Since the high-pressure fluid injected from the orifice 36 is sent through the injection hole 29 in this way, the flow line is not disturbed even by suction from the suction hole 34 of the suction nozzle 33 and reaches the surgical site. Can be injected.

[Problems to be solved by the invention] In the conventional surgical handpiece described above, since the needle portion 27 is provided in the downstream direction of the nozzle tip 26, the orifice 36 of the nozzle tip 26
There was a problem in that the high pressure fluid injected from the needle part 27 suffered a pressure loss while passing through the injection hole 29 of the needle part 27.

This invention was made to solve these problems, and the purpose is to obtain a surgical handpiece that has no pressure loss and is easy to operate.

[Means for Solving the Problems] The surgical handpiece according to this invention has a through-hole cross-sectional area of the nozzle pipe formed of the same material or a different material as the nozzle pipe at the tip end of the nozzle pipe protruding from the tip of the handpiece. A suction nozzle device having a shrinking orifice and a suction hole surrounding the outer periphery of the nozzle pipe and close to the opening end of the orifice is integrally provided, and the nozzle pipe is bent at a predetermined angle with respect to the axis of the handpiece. It is characterized by:

[Function] In this invention, an orifice for injecting high-pressure fluid is provided at the tip of the nozzle pipe that protrudes from the handpiece, so there is no pressure loss of the high-pressure fluid, and there is no pressure loss between the handpiece axis and the high-pressure fluid. It becomes easy to make the injection directions different from each other, and it also becomes possible to improve operability by bending the nozzle pipe at a predetermined angle.

Furthermore, by providing the nozzle orifice close to the suction port, high-pressure fluid can be ejected from the orifice without being affected by the suction force from the suction port.

[Embodiment] FIG. 1 is a partial longitudinal sectional side view showing the structure of an embodiment of this invention. In the figure, 2 indicates a through hole 3 inside.
It is a nozzle pipe having a nozzle pipe 2.
is fixed to the tip of the handpiece 1 by a pipe holder 4. This nozzle pipe 2 is bent at a predetermined angle with respect to the axis of the hand piece 1, and has an orifice 5 at its tip. The orifice 5 can be formed by reducing the cross-sectional area of the through hole 3 of the nozzle pipe 2 to provide a jet nozzle, or by using a nozzle chip made of diamond, sapphire, ceramics, etc., as shown in FIG. 6 is attached to the tip of the nozzle pipe 2.

The handpiece body includes a suction nozzle 7 surrounding the outer periphery of the nozzle pipe 2, and is integrally equipped with a suction nozzle device having suction ports 8, 9 provided on the tip surface and the side surface of the tip. This suction port 8,
9 is a suction pipe 3 through a suction hole 10 fixed between the outer surface of the nozzle pipe 2 and the inner surface of the suction pipe.
It is connected to 5.

When high-pressure fluid is sent from the pump 21 to the surgical handpiece 1 configured as described above, the high-pressure fluid is sent from the handpiece body through the nozzle pipe 2 to the orifice 5. This high-pressure fluid is then injected toward the surgical site by the orifice 5. On the other hand, the fluid injected into the surgical site and the surrounding fluid are suctioned from the suction ports 8 and 9, and passed through the suction hole 10, suction pipe 35, and suction hose 25 to the suction device 24.
sent to.

When this high-pressure fluid is injected, the high-pressure fluid sent from the handpiece body to the orifice 5 passes through the through hole 3, which has a larger cross-sectional area than the orifice 5, so that pressure loss upstream of the orifice can be reduced. Since the pressure loss of the nozzle pipe 2 is thus small, fluid can be ejected from the orifice 5 at a constant pressure even if the length of the nozzle pipe 2 is varied depending on the application.

In addition, since the opening end of the orifice 5 and the suction ports 8 and 9 are provided close to each other, the fluid that is narrowed down by the orifice 5 and injected at high pressure is transferred to the suction ports 8 and 9.
A very good jet shape can be obtained without being affected by the suction force.

Incidentally, as in the illustrated example, the nozzle pipe 2 may be formed by being bent by a predetermined angle from the axis of the handpiece body. However, by bending the shape, the axis of the handpiece and the direction of high-pressure fluid jetting can be made different, making it possible to improve the operability of the surgical handpiece by making it easier to confirm the surgical site. be.

[Effects of the invention] As explained above, this invention has an orifice that injects high-pressure fluid at the tip of the nozzle pipe that protrudes from the handpiece, so the nozzle pipe can be bent at a predetermined angle to adjust the direction in which the high-pressure fluid is ejected. Even if the axis of the handpiece is made different from the axis of the handpiece, operability can be improved without causing pressure loss of the high-pressure fluid. In addition, even if the length of the nozzle pipe is changed, it is less affected by pressure loss, so it is possible to obtain a handpiece with a length suitable for the purpose.

Furthermore, since the nozzle opening and the suction port are provided close to each other, it is possible to obtain a good jet shape of the high-pressure fluid.

[Brief explanation of the drawing]

Fig. 1 is a partial vertical side view showing the structure of an embodiment of this invention, Fig. 2 is a sectional view showing the nozzle part of another embodiment, Fig. 3 is an explanatory diagram showing the outline of a surgical handpiece, FIG. 4 is a sectional view showing the tip of a conventional surgical handpiece. 1...Hand piece, 2...Nozzle pipe, 3
...Through hole, 4...Pipe holder, 6...Orifice, 6...Nozzle tip, 7...Suction pipe,
8, 9... Suction port, 10... Suction hole.

Claims (1)

[Scope of Claim for Utility Model Registration] A surgical handpiece that injects high-pressure fluid and is integrally equipped with a suction nozzle device having a suction port, in which a nozzle pipe protrudes from the tip of the handpiece. The tip of the nozzle pipe is provided with an orifice formed of the same material or a different material to reduce the cross-sectional area of the through hole of the nozzle pipe, and the suction port is provided at a position close to the open end of the orifice, and the nozzle A surgical handpiece, wherein the pipe is bent at a predetermined angle with respect to the axis of the handpiece.