JPH01314558A - Nozzle of operating handpiece - Google Patents

Abstract

PURPOSE:To enhance operability and to always develop normal capacity by mounting a rib for coaxially supporting a nozzle pipe in a suction pipe and forming the shape of the leading end of the rib into a streamline shape. CONSTITUTION:A high pressure fluid is sent to an orifice from a handpiece main body 1 through a nozzle pipe 2 and injected toward a region to be operated. The injected fluid or the fluid therearound is sucked through a suction pipe 5 and a suction hose 17. When said high pressure fluid is injected, there is often such a case that the leading end of the suction pipe 5 or nozzle pipe 2 is directly brought into contact with an operating part to apply force thereto. In this case, since the nozzle pipe 2 is coaxially supported in the suction pipe 5 by ribs 8, even when the suction pipe 5 or the nozzle pipe 2 is deformed by the force applied thereto, the high pressure fluid can be injected without changing the relative position of the leading end of the suction pipe to that of the nozzle pipe. By forming the shape of the leading end of each of the ribs 8 into a streamline shape, the resistance of the fluid sucked in the suction pipe can be reduced and the accumulation of separated tissue on the ribs can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a nozzle for a surgical handpiece for performing incision, resection, cleaning, etc. by jetting high-pressure fluid, and particularly to optimization of fluid jetting.

[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. 61-2401: No. 1, Publication No. 62-136
04 Publication, Utility Model Publication No. 62-32009, Utility Model Number 6
It is disclosed in Japanese Patent No. 2-32010 and the like.

In this method of using a pressurized fluid jet, by adjusting the pressure and injection amount within an appropriate range, it is possible to align the material with the surrounding tissue without cutting the vascular system or other material. In addition, the loose tissue can be removed from the hλ surgical site together with the injected fluid. Its application range is wide, including incision and cutting using high pressure such as 10 MPa, and ff1lJ using low pressure of I MPa or lower.
flit, part B of parenchymal cells and elementary materials in the flexible region
1. It can be used for cleaning etc.

FIG. 4 is a sectional view showing the tip of a surgical handpiece disclosed in, for example, Japanese Utility Model Publication No. 62-32010. In the figure, reference numeral 11 denotes a nozzle tip that is attached to the handpiece body 1 and has an orifice 18 at its tip.The nozzle tip 11 has a nozzle pipe 12 extending in the downstream direction.
It communicates with a through hole 14 provided in the.

A suction pipe 15 has a suction hole 16 surrounding the outer periphery of the nozzle pipe 12, and the suction pipe 15 is connected to a suction device (not shown) via a suction hose 17.

When pressurized fluid is sent from a pump (not shown) to the surgical handpiece configured as described above, the pressurized fluid flows through the through hole 14 of the nozzle tip 11 and the injection hole 1 of the nozzle pipe 12.
On the other hand, the fluid in and around the surgical site is suctioned through the suction pipe 15.

[Problems to be Solved by the Invention] In the conventional surgical handpiece described above, the orifice 18 is provided at the tip of the through hole 14 of the nozzle tip 11, so that the high-pressure fluid injected from the orifice 18 flows through the injection hole of the nozzle pipe 12. 13, there was a disadvantage that it suffered a pressure loss while passing through.

In order to improve this shortcoming, the applicant proposed a handpiece in which an orifice 4 is provided at the tip of the through hole 3 of the nozzle pipe 2, as shown in FIG.
(filed on August 29th, Patent Application No. 1983).

In the handpiece shown in FIG. 5, an orifice 4 for injecting high-pressure fluid is provided at the tip of a nozzle pipe 2 protruding from the handpiece body 1, so that no pressure loss occurs in the high-pressure fluid. The length of the nozzle pipe 2 can be changed depending on the application, and the operability of the handpiece can be improved.

However, since the tip of this handpiece, that is, the nozzle pipe 2 and the suction pipe 5, are used directly in the surgical area, the suction pipe 5 or the nozzle pipe 2 may come into direct contact with the substance of the surgical area. Sometimes force is applied to the tip. As a result, the suction pipe 5 or the nozzle pipe 2 is deformed, and the concentricity of the nozzle pipe 2 and the suction pipe 5 is lost as shown in FIG. There is a disadvantage that the part where the distance between the nozzle pipe 2 and the suction pipe 5 is narrowed is clogged with detached materials to be sucked, and the handpiece may not be able to perform its normal performance.

This invention was made to solve these problems, and aims to provide a nozzle for a surgical handpiece that can improve operability and always exhibit normal performance. .

[Means for Solving the Problems] A nozzle of a surgical handpiece according to the present invention has a suction port at its tip and a suction pipe provided to protrude from the handpiece body, and an orifice at its tip to perform the suction. It is characterized by comprising a nozzle pipe disposed within the pipe and a rib coaxially supporting the nozzle pipe within the suction pipe.

Furthermore, the rib that coaxially supports the nozzle pipe within the suction pipe is characterized in that its tip has a streamlined shape.

[Function] In this invention, since the nozzle pipe is coaxially supported within the suction pipe by the rib, even if the suction pipe or the nozzle pipe is deformed by force applied thereto, the relative position of the suction pipe tip and the nozzle pipe tip remains unchanged. High-pressure fluid can be ejected without changing.

In addition, by making the tip of the rib that supports the nozzle pipe inside the suction pipe streamlined, it is possible to reduce the resistance of the fluid sucked inside the suction pipe, and at the same time, it is possible to reduce the amount of tissue that accumulates on the rib. This can be prevented.

[Embodiment] FIG. 1 is a partial longitudinal sectional side view showing the structure of an embodiment of the present invention. As shown in the figure, a nozzle pipe 2 having a through hole 3 inside is attached to the tip of the handpiece body 1 by a pipe holder 6, and the tip is bent at a predetermined angle with respect to the axis of the handpiece body 1. There is. The nozzle pipe 2 has an orifice 4 at its tip. 8 is a rib that supports the nozzle pipe 2 coaxially within the suction pipe 5. As shown in the sectional view of FIG. 2, the rib 8 supports a part of the outer surface of the nozzle pipe 2 with a part of the inner surface of the suction pipe 5, and has a suction passage 9 between the rib 8 and the inner surface of the suction pipe 5. . The tip of the rib 8 is formed into a streamlined shape as shown in the side cross-sectional view of FIG. 3, so that the resistance of the fluid flowing through the suction passage 9 is made as small as possible.

When high-pressure fluid is sent to the surgical handpiece configured as described above, the high-pressure fluid is sent from the handpiece body 1 through the nozzle pipe 2 to the orifice 4, and is injected from the orifice 4 toward the surgical site. On the other hand, the fluid injected into the surgical site and the surrounding fluid are removed from the suction pipe 5 and suction port 17.
and is sent to a suction device (not shown).

When injecting this high-pressure fluid, the tip of the suction pipe 5 or the tip of the nozzle pipe 2 may directly touch the substance of the surgical site and force may be applied. This force causes the suction pipe 5
Alternatively, even if the nozzle pipe 2 is deformed, the coaxiality between the nozzle pipe 2 and the suction pipe 5 will not be lost because the rib 8 is provided between the nozzle pipe 2 and the suction pipe 5. Therefore, high-pressure fluid can be constantly ejected from the tip orifice 4 of the nozzle pipe 2 to the surgical site.
Moreover, the ejected fluid etc. can be suctioned well by the suction pipe 5.

In the illustrated example, an example in which two ribs 8 are provided has been described, but the number of ribs 8 is determined as appropriate depending on the length of the nozzle pipe 2. When using multiple ribs 8,
Of course, the ribs 8 are arranged so that they do not interfere with the suction of liquid to be aspirated or of parenchymal fragments produced during surgery.

In addition, although the illustrated example shows a case where the suction pipe 5 and the nozzle pipe 2 are beveled at a predetermined angle from the axis of the handpiece body 1, the suction pipe 5, etc.
It may be formed straight to the axis of the.

Further, in the illustrated example, the case where the tip surface of the suction pipe 5 and the tip surface of the nozzle pipe 2 are on the same plane is explained, but by making the tip surface of the nozzle pipe 2 slightly inside the tip surface of the suction pipe 5, It is also possible to prevent the tip of the nozzle pipe 2 formed from a thin tube from directly touching the surgical site, thereby preventing minute deformation of the nozzle pipe 2.

[Effects of the Invention] As explained above, in this invention, since the nozzle pipe is coaxially supported within the suction pipe by the rib, even if the suction pipe or the nozzle pipe is deformed due to force applied thereto, the tip of the suction pipe and the nozzle pipe are The relative position of the tips remains unchanged;
It is possible to inject high-pressure fluid with a good injection shape to a predetermined operative site, and it is also possible to suction well without clogging the suction port of the suction pipe.

Furthermore, since the tips of the ribs that support the nozzle pipe and the suction pipe have a streamlined shape, the resistance of the fluid sucked through the suction pipe can be reduced and the fluid can be suctioned smoothly.

[Brief explanation of the drawing]

Fig. 1 is a partial vertical sectional side view showing the structure of an embodiment of the present invention, Figs. 2 and 3 show the rib of the above embodiment, Fig. 2 is a front sectional view of the rib, and Fig. 3 is a cross-sectional view of the rib. 4 is a sectional view showing the tip of a conventional surgical handpiece, FIG. 5 is a partial longitudinal side view showing the structure of another conventional example, and FIG. 6 is a sectional view showing the operation of the conventional example. It is a diagram. 1... Handpiece body, 2... Nozzle pipe, 3
...Through hole, 4... Orifice, 5... Suction pipe, 7... Suction port, 8... Rib. Agent Patent Attorney Masatoshi Sato

Claims (2)

[Claims] (1) A surgical handpiece that injects high-pressure fluid includes a suction pipe having a suction port at its tip and protruding from the handpiece body, and an orifice at its tip disposed within the suction pipe. A nozzle for a surgical handpiece, comprising a nozzle pipe and a rib coaxially supporting the nozzle pipe within a suction pipe. (2) The nozzle for a surgical handpiece according to claim 1, wherein the tip of the rib has a streamlined shape.