JP2541760B2 - Surgical suction tube - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surgical suction tube for sucking body fluid or lavage fluid during a surgical operation.

[0002]

2. Description of the Related Art A conventional surgical suction tube of this type, as shown in FIG. 7, comprises an inner tube 1 whose proximal end is connected to a suction source and an outer tube 2 which concentrically surrounds the outer circumference thereof. The inner tube 1 is provided with a suction opening 1a at its tip, and the outer tube 2 is attached to the inner tube and has a large number of suction holes 2a at its tip. The tip of this suction tube is inserted into the surgical site of the patient during surgery, and body fluid and cleaning fluid pass through the suction hole 2a, the suction opening 1a at the tip of the inner tube, and the inside of the inner tube 1 as shown by the arrow 3, Is sucked to the suction source.

[0003]

The conventional surgical suction tube as described above is convenient for sucking body fluid or cleaning fluid from a relatively wide area because the tip of the outer tube has a certain diameter. It cannot be used when suctioning a narrow surgical site or when performing suction by piercing a tube from the outside of the body to the affected part in the non-incision surgery.

Further, when coagulating a tissue or the like, a normal suction tube cannot be used, and a scalpel tip electrode must be used separately or an extremely thin suction tube having a coagulation function must be used.

The present invention has been made in view of the above points, and an object thereof is to obtain a surgical suction tube which can be used for a normal suction application and a suction application in a narrow site. Especially. Another object of the present invention is to obtain a surgical suction tube that can be used for coagulation by itself.

[0006]

According to the present invention, an inner tube having a proximal end connected to a suction source and having a suction opening at the distal end, and an inner tube accommodating the inner tube and a suction hole near the distal end are provided. In a surgical suction tube consisting of an outer tube having an outer tube, a suction port having a size that allows the inner tube to pass through is formed at the tip of the outer tube, and the inner tube has a normal position located inside the outer tube and a tip. The outer tube is slidable in the outer tube between the forward position projecting from the most distal suction port, and the inner tube has a suction port at the most distal end and is detachably provided from the outer tube. There is.

In addition, in order to use the surgical suction tube according to the present invention for coagulation, the inner tube is made of a conductor and is connected to a high frequency power source at the base end, and the outer circumference of the inner tube is excluding the tip portion. Covered with an insulating layer.

[0008]

In the surgical suction tube described above, when the inner tube is in the normal position, fluid such as body fluid is sucked into the outer tube through the suction hole of the outer tube, and then from the suction opening of the inner tube through the inner tube. Aspirated to source. On the other hand, at the forward position where the inner tube is projected from the tip of the outer tube, liquid such as body fluid is directly sucked from the suction opening of the inner tube. Also, by connecting the inner tube in the advanced position to a high frequency power source, the tissue can be coagulated at the tip of the inner tube.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the surgical suction tube 10 is an inner tube 1.
1 and an outer tube 12. The outer tube 12 is a cylindrical tube, and a suction hole 12a having a size that allows the inner tube 11 to pass therethrough is formed at a tip thereof, and a large number of suction holes 12b are formed at an outer peripheral portion near the tip of the outer tube 12. The outer tube 12 is usually
The inner tube 11 extends beyond the frontmost suction opening 11 a, and the suction opening 11 a is inside the outer tube 12.

The inner tube 11 projects rearward from the rear end of the outer tube 12, and the rear end of the inner tube 11 is connected to a connecting portion 1 for connecting a tip of a hose connected to a suction (vacuum) source in a surgical instrument.
3 is provided. On the other hand, a terminal 14 for connecting to a high-frequency power source (not shown) is provided along with the connecting portion 13.

In FIG. 2, which shows an exploded view of the suction tube 10,
A suction opening 11b is also formed on the side surface of the distal end portion of the inner pipe 11, and most of the inner pipe 11 has an outer diameter smaller than the inner diameter of the outer pipe 12. A large-diameter portion 16 is integrally provided at the base end portion of the inner pipe 11, and the outer diameter of the large-diameter portion 16 is dimensioned to be slidably fitted in the hole inside the outer pipe 12.

On the outer peripheral surface of the large diameter portion 16, peripheral grooves 17a and 17b are formed at two locations in the longitudinal direction. These circumferential grooves 17a and 17b form an engaging portion. When the inner pipe 11 in the state shown in FIG. 2 is inserted into the outer pipe 12 from its rear end (right end), the connecting end step portion 18 on the base end side of the inner pipe 11 is packed.
Before contacting the rear end of the outer tube 12 via a, the outer tube 12 is temporarily stopped in the state of FIG.

The inner tube 11 is entirely made of a conductive material, and except the tip thereof, an electric insulating layer capable of withstanding high-pressure steam sterilization is provided on the outer circumference. The conductive material at the tip is exposed because of tissue coagulation due to a high-frequency current described later. The large diameter portion 16 is covered with a heat resistant resin. As shown in FIG. 3, a cock 20 is provided between the large diameter portion 16 of the base portion of the inner pipe 11 and the connecting portion 13. Cook 2
By the operation of 0, the suction passage 21 is opened and closed.

At the rear end of the outer tube 12, engaging means 23 is provided as shown in FIG. In this embodiment, the engagement means 23 is an engagement lever, and the large diameter portion 16 is provided in the middle thereof.
The engaging lever 23 is pivotally attached to the engaging lever 23, and an engaging piece 23a is projectingly provided at one end of the engaging lever 23, and the other end 23b serves as an operating portion. The engaging lever 23 is constantly given a force to rotate clockwise (in FIG. 4) by the spring 25. The rear end portion of the outer tube 12 has a large diameter, and an opening 26 through which the engaging piece 23a passes is formed therein. In the state of FIG. 4, the tip of the engagement piece 23a passes through the opening 26 and the inner pipe 11
The inner tube 11 is axially positioned in the outer tube 12 by engaging with one of the circumferential grooves 17b of the outer tube 12.

Next, the operation of the surgical suction tube described above will be described.

In normal use, the suction tube 10 is in the state shown in FIG. In this state, the engaging piece 23 of the engaging means 23
a is engaged with the circumferential groove 17a, and the inner pipe 11 is inside the outer pipe 12. The connection part 13 is connected to a vacuum source via a hose, the base of the suction tube 10 is held by hand, and the tip of the suction tube is brought to the vicinity of the affected area, whereby the body fluid, cleaning solution, etc. accumulated therein are sucked. The liquid to be sucked is the suction hole 12
a through the suction openings 11a and 11b, enters the inner tube 11, and is sucked into the suction source.

On the other hand, when it is desired to suck the liquid in a narrow area,
When the engagement lever 23 is pressed down against the force of the spring 25 with a finger, the engagement piece 23a is disengaged from the circumferential groove 17a, and in this state, the base portion of the inner pipe 11 is pushed forward and slid in the outer pipe 12. When the circumferential groove 17b reaches the position of the engaging piece 23a, the engaging piece 23a snaps into the circumferential groove 17b by the action of the spring 25. As a result, the suction tube 10 is brought into the state shown in FIGS. 4, 5 and 6. In this state, the inner pipe 11
Takes an advanced position, its tip projects slightly from the tip of the outer tube 12, and the suction openings 11a and 11b are exposed. Therefore,
It is possible to insert the tip of the thin inner tube 11 into a narrow portion and perform suction work there.

On the other hand, the suction tube 10 can also be used for coagulating tissue in the state shown in FIGS. Terminal 14
Can be connected to a high-frequency power source with a cord, and the exposed distal end of the inner tube 11 can be applied to the bleeding site while performing suction during surgery to perform hemostatic coagulation by a high-frequency current.

Switching between the normal position shown in FIG. 1 and the forward position shown in FIG. 6 can be performed simply and quickly by operating the engaging lever 23 and sliding the inner pipe 11.

On the other hand, the inner tube 11 can be used by completely removing it from the outer tube 12. Recently, there is an operation that is performed by laparoscopically looking inside the body without laparotomy. When performing such a laparoscopic surgery, a thin pipe is penetrated through the abdominal wall toward the affected area, the inner tube 11 is inserted through the pipe, and suction or high-frequency coagulation of human tissue is performed.

[0022]

As described above with reference to the embodiments,
According to the present invention, it is needless to say that it is possible to take a normal use mode in which the liquid is sucked from the tip portion of the outer tube of the suction tube.
By operating the engaging means, the inner tube can be slid by a certain amount so that the tip of the thin inner tube projects from the tip of the outer tube. Therefore, it is possible to suck or coagulate the liquid in a narrow area using the thin inner tube, and when the need is eliminated, the inner tube can be easily accommodated in the outer tube. On the other hand, it is possible to completely remove the inner tube from the outer tube and burn the tissue with the tip of the inner tube to perform hemostatic coagulation.

[Brief description of drawings]

FIG. 1 is a perspective view of a surgical suction tube of the present invention.

FIG. 2 is an exploded view of FIG.

FIG. 3 is a partially enlarged cross-sectional view of the base portion of the inner pipe.

FIG. 4 is a partially enlarged cross-sectional view of the base of the surgical suction tube.

5 is a cross-sectional view showing an inner tube advancing position of the surgical suction tube of FIG.

FIG. 6 is a perspective view of FIG.

FIG. 7 is a perspective view of a conventional surgical suction tube.

[Explanation of symbols]

 10 Surgery pipe for operation 11 Inner pipe 11a, 11b Suction opening 12 Outer pipe 12a Suction hole 13 Connection part 14 Terminal 16 Large diameter part 17a, 17b Engagement part (circumferential groove) 20 Cock 23 Engagement means (engagement lever) 23a Engaging piece 25 Spring

Claims (3)

(57) [Claims] 1. A surgical suction comprising an inner tube having a proximal end connected to a suction source and having a suction opening at a distal end, and an outer tube having an inner tube housed therein and having a suction hole near the distal end. In the tube, a suction port having a size that allows the inner tube to pass through is formed at the tip of the outer tube, and the inner tube has a normal position located inside the outer tube and a tip protruding from the tip of the outer tube. Between the advancing position and the advancing position, and the inner tube has a suction opening at the tip and is provided so as to be detachable from the outer tube. . 2. A base end portion of the inner pipe is densely and slidably inserted into an inner hole of the outer pipe, and at least two engaging portions spaced apart from each other in the longitudinal direction of the base end portion of the inner pipe. Is formed, and the outer tube supports the engaging means that is selectively engageable with any one of the engaging parts, and when the engaging means engages with one of the engaging parts, the inner tube is The surgical suction tube according to claim 1, wherein the inner tube is in the normal position, and the inner tube is in the advanced position when the engaging means engages with the other engaging portion. 3. The inner tube is made of a conductor and is connected to a high frequency power source at the base end, and the outer circumference of the inner tube is covered with an insulating layer except for the tip end portion. The surgical suction tube according to 2.