KR20160141412A - Egress cannula - Google Patents

Abstract

The present invention relates to a discharge cannula comprising: a pipe-shaped body unit; an outer tube coupled with the body unit and connected with the body unit; an inner tube installed in the outer tube, having a front end part inserted in and discharged from the outer tube, and having a discharge hole connected with the outside of the front end part; and an elastic member disposed in the body unit, and forwardly elastically supporting the inner tube. According to the present invention, a separate trocar does not need to be mounted, and thus operation time is rapid and simple compared to a conventional discharge cannula, so an operation procedure and time can be saved. Moreover, joint damage caused by a trocar and iatrogenic joint damage which may occur when a tool is operated can be prevented.

Description

Egress cannula < RTI ID = 0.0 >

The present invention relates to a drainage cannula. More particularly, the present invention relates to a drain cannula for discharging a perfusion liquid during an endoscopic procedure.

Joint endoscopy has been used extensively for the diagnosis and treatment of various lesions in the joints. Recently, it has become increasingly important not only for human medicine but also for veterinary medicine in veterinary medicine.

However, there is a risk of joint surface damage due to the equipment used for joint endoscopy. Especially, when applied to small joints or small joints of humans, there is a high possibility of damage of joints due to manipulation of instruments.

During endoscopic endoscopic procedures, intra-articular perfusion is needed to ensure adequate space within the capsulorrhaphy or to remove turbidity caused by hemorrhage or floaters during operation. In order to maintain proper infusion and release of the perfusate, adequate pressure and sufficient volume of perfusate should be injected and the perfusate should be appropriately drained to the outside.

To this end, a hypodermic needle may be used for small-sized joints that can not be used with a drain cannula or designed for drainage.

However, when a drainage cannula is used in a small joint, torn joint damage may occur during trocar insertion or instrument manipulation, and in the case of a needle, In addition, the drainage cannula is often clogged or dislodged compared with the drainage cannula, which may cause a problem of requiring more operations during the procedure.

United States Patent No. 5913852 (June 22, 1999)

In order to solve the above-mentioned problem, the present invention provides an improved drainage cannula capable of smoothly discharging perfusion liquid during joint endoscopic procedures, minimizing the tortuous damage of the joints, and easily mounting the small-sized joints .

According to an aspect of the present invention, An outer tube coupled to the body and communicating with the body; An inner tube provided inside the outer tube so that a front end portion thereof is inserted into and extracted from the inner and outer portions of the outer tube, and a drain hole communicating with the outer portion is formed at the front end portion; And an elastic member disposed inside the body portion and urging the inner tube forward.

Here, the front end of the outer tube is provided with a sharpened tip portion.

Further, a drain hole communicating with the outside is formed in a front portion of the outer tube.

Further, the front end of the inner tube is curved.

Further, a flange protruding in a radial direction and being resiliently biased by the elastic member is formed on a rear outer circumferential surface of the inner tube disposed inside the body portion.

In addition, a regulating valve is provided at the rear end of the body portion to regulate the amount of the perfusion liquid flowing into the body portion.

The present invention eliminates the need to mount a separate trocar or the like, so that the application time is quick and simple compared with the conventional drain cannula, and the operation procedure and time can be saved. In addition, there is an effect of preventing damage to joints caused by the trocar tub and damage to the tongue-like joint that may occur during operation of the apparatus.

In addition, the drainage of the perfusion liquid can be maintained smoothly with the distal structure having a porous structure, and the necessity of operation due to clogging of the tube is reduced compared to the case of using a needle or the like.

1 is a view showing a state in which an inner tube of a drain cannula is drawn out according to a preferred embodiment of the present invention.
FIG. 2 is a view showing a state in which an inner tube of a drain cannula according to a preferred embodiment of the present invention is inserted.
3 is a cross-sectional view of an outer tube and an inner tube provided in a drain cannula according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. Further, if it is determined that the gist of the present invention may be blurred, detailed description thereof will be omitted. Further, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be practiced by those skilled in the art.

FIG. 1 is a view showing a state in which an inner tube of a drain cannula is drawn out according to a preferred embodiment of the present invention. FIG. 2 is a perspective view showing a state in which an inner tube of a drain cannula according to a preferred embodiment of the present invention is inserted 3 is a cross-sectional view of an outer tube and an inner tube provided in a drain cannula according to a preferred embodiment of the present invention.

Hereinafter, a drain cannula 100 according to a preferred embodiment of the present invention will be described with reference to FIGS.

The drain cannula 100 according to the preferred embodiment of the present invention includes a body portion 110, an adjustment valve 120, an outer tube 130, an inner tube 140, and an elastic member 150.

The drain cannula 100 according to the preferred embodiment of the present invention is provided to smoothly discharge the intra-articular fluid and prevent joint damage during operation. The outer tube 130 and the inner tube 140 And the inner tube 140 is configured to be forwardly biased through the elastic member 150 mounted inside the body portion 110. [

Specifically, the body portion 110 is formed in a tubular shape having an open front end and a rear end.

The control valve 120 is connected to the rear end of the body 110 to regulate the amount of the liquid flowing into the body 110.

The control valve 120 may be implemented as a luer-lock type and may control the amount and speed of the inflow liquid flowing into the body 110 by rotating the lever 122. Since the shape of the regulating valve 120 can be easily realized through known techniques, the detailed description of the regulating valve 120 will be omitted.

The outer tube 130 is formed in an elongated tubular shape and communicates with the body 110, and the rear portion is tightly coupled and fixed to the front opening portion of the body 110.

A plurality of drain holes (132) communicating with the outside are formed on the outer peripheral surface of the front portion of the outer tube (130).

The front end of the outer tube 130 is formed with a sharpened tip portion 134 formed of an inclined surface.

The inner tube 140 is installed inside the outer tube 130 so that the front end thereof is inserted into and out of the outer tube 130. Specifically, the inner tube 140 is formed to have an outer diameter smaller than the inner diameter of the outer tube 130, so that the inner tube 140 can be moved in the forward and backward directions while being inserted into the outer tube 130.

A plurality of drain holes 142 communicating with the outside are formed in the front portion of the inner tube 140. The front end of the inner tube 140 is formed in the shape of a round curved surface unlike the outer tube 130 formed with a sharp point .

A flange 144 protruding in the radial direction is formed on a rear outer circumferential surface of the inner tube 140 disposed inside the body 110.

The flange 144 preferably has a diameter larger than the inner diameter of the outer tube 130 so that the flange 144 is in contact with the rear end of the outer tube 130 so that the inner tube 140 is separated from the outer tube 130 ≪ / RTI >

The elastic member 150 is disposed inside the body portion 110 and functions to urge the inner tube 140 forward, and may be realized as a spring.

The elastic member 150 has a front end abutting against the flange 144 and a rear end abutting against the body 110 to press the inner tube 140 forward.

The drain cannula 100 according to the preferred embodiment of the present invention is constructed such that the outer tube 130 having the drain holes 132 and 142 and the front portion of the inner tube 140 are connected to the drainage passage Of the skin.

The inner tube 140 having a curved shape comes into contact with the internal body tissue to compress the elastic member 150 so that the front portion of the inner tube 140 is compressed And is inserted into the outer tube 130.

In this state, the tip portion 134 of the outer tube 130 is located at the forefront of the drain cannula 100, and the sharp tip portion 134 can be used to penetrate the capsule and easily enter the inside thereof do.

Immediately after the tip 134 of the outer tube 130 enters into the capsule, the compressed state of the elastic member 150 is released so that the front portion of the inner tube 140, which has been inserted into the outer tube 130, And flows the perfusion liquid through the provided drain hole 142. [0064] As shown in FIG.

At this time, since the front end of the inner tube 140 is formed as a curved surface, it is possible to prevent damage to tissues and joints that are in contact with each other.

Meanwhile, the drain cannula 100 according to the preferred embodiment of the present invention may be designed for disposable or multi-use, and thus may be made of various materials. It is of course also possible to use materials and structures suitable for washing, disinfection and sterilization for the use of multi-layer.

The drain cannula 100 according to the preferred embodiment of the present invention can effectively discharge the perfusion solution including the floating matters generated during the endoscopic procedure through the porous structure formed by the plurality of drain holes 132 and 142 formed in the front portion The tip portion 134 of the sharp outer tube 130 is used to penetrate the articular capsule when the articulation endoscope is implanted and the sharpened inner tube 134 is used to penetrate the articular endoscope. It is very useful in that the tear joint 140 can be prevented from being pulled out.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and accompanying drawings. The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

100: drainage cannula
110: body portion 120: regulating valve
122: lever 130: outer tube
132, 142: Drain hole 134:
140: inner tube 144: flange
150: elastic member

Claims (6)

A tubular body portion;
An outer tube coupled to the body and communicating with the body;
An inner tube provided inside the outer tube so that a front portion thereof is inserted and extracted into and out of the outer tube, and a drain hole communicating with the outside is formed in the front portion; And
And an elastic member disposed inside the body portion and urging the inner tube forward. The method according to claim 1,
Wherein the front end of the outer tube is provided with a sharpened tip portion. The method according to claim 1,
And a drain hole communicating with the outside is formed in a front portion of the outer tube. The method according to claim 1,
Wherein a front end of the inner tube forms a curved surface. The method according to claim 1,
And a flange protruding in a radial direction is formed on a rear outer circumferential surface of the inner tube disposed inside the body portion. The method according to claim 1,
And a control valve is provided at a rear end of the body to adjust an amount of the liquid to be introduced into the body.

Images