KR20120136983A

KR20120136983A - Assembly for biopsy needle

Info

Publication number: KR20120136983A
Application number: KR1020110056240A
Authority: KR
Inventors: 한대희
Original assignee: 가톨릭대학교 산학협력단
Priority date: 2011-06-10
Filing date: 2011-06-10
Publication date: 2012-12-20

Abstract

The present invention relates to a biopsy needle. The present invention is a hub having a through space therein; Sheath extending to a predetermined length on one side of the hub; And a stylet inserted into the sheath through the through space, having a relatively longer length than the sheath, and having a shear bent in one direction. According to the present invention, the adjustment of the operator is simple, there is an effect that can be performed at one time without the need to remove the biopsy needle in the middle.

Description

Assembly for Biopsy Needle

The present invention relates to a biopsy needle, and more particularly, to a biopsy needle that can be easily redirected and guided toward a target lesion even when inserted into the patient's body for biopsy, without having to be inserted into the patient's body several times. It is about.

Biopsy is frequently done to confirm cancer and other diseases. In the past, tumors were excised after wide incision of the skin for histological examination, but recently, methods for securing and diagnosing tissues with minimal manipulation without using skin incisions using acupuncture, guns, and mammoth saws have been implemented.

As a method of biopsy, a biopsy needle test is widely used because of its high accuracy. Conventional biopsy using acupuncture, after making a small incision of 2 to 3mm in the skin and inserting the biopsy needle through it, the process of extracting the tissue of the lesion using a double-structured biopsy needle and undergoes a test.

At the time of biopsy, even if the biopsy needle (the sheath surrounding the biopsy needle in the case of a dual structure biopsy needle) was initially aimed precisely in the direction of the target, it may be caused by inequalities in tissue strength or patient movement. Needle direction is often off target. Because of this, almost all practitioners performing percutaneous biopsies insert the biopsy needle into the target in small increments by dividing the biopsy needle from the skin into the target in several stages. An attempt is made to redirect it towards the target.

However, in the state where the biopsy needle penetrates the skin and the thick chest wall (or abdominal wall), a lot of power goes into repositioning the biopsy needle and there is a problem of causing severe pain in the process. In addition, in the case of a lung lesion biopsy, when the biopsy needle is removed to adjust the position of the biopsy needle, pneumothorax occurs and the lung becomes like a balloon with a flat air, which makes it difficult to perform the procedure again.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, even if the direction of the bio-acupuncture direction mismatch during the procedure is easy to reorient the procedure at once without risk of pneumothorax or pain It provides a biopsy needle that can be finished.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

According to a feature of the present invention for achieving the above object, the present invention is a hub formed with a through space therein; Sheath extending to a predetermined length from one side of the hub; And a stylet inserted into the sheath through the through space, having a relatively longer length than the sheath, and having a front end bent in one direction.

The rear end of the stylet is characterized in that the operator is provided with an adjustment unit for gripping by hand.

It is coupled to surround the stylet extending to the outside of the hub, characterized in that it further comprises a stopper positioned between the hub and the adjustment portion.

The stopper is partially cut along the longitudinal direction, characterized in that made of a material having elasticity.

The front surface of the stylet is characterized in that the guide surface is inclined.

The hub is characterized in that the sealing member for blocking the through space with the outside air is coupled.

The sealing member is characterized in that the sealing material is provided through the stylet.

According to the present invention, the stylet constituting the biopsy needle is formed longer than the sheath, the tip of the stylet is bent, and the stylet is normally set to the same length as the sheath and then protrudes forward only when the direction is adjusted, so that The operator can be more easily adjusted at the time of insertion, and thus the operator's adjustment is simple, so that the procedure can be performed at one time without having to remove the biopsy needle in the middle.

1 is a perspective view showing a biopsy needle according to an embodiment of the present invention.
Figure 2 is a partial perspective view of the stylet constituting the biopsy needle according to the present invention.
3 is a cross-sectional view of the stopper constituting the biopsy needle according to the present invention.
4 and 5 is an exemplary view showing that the procedure with a biopsy needle in accordance with an embodiment of the present invention.

Hereinafter will be described in detail with reference to the accompanying drawings an embodiment of a biopsy needle according to the present invention.

1 is a perspective view showing a biopsy needle according to an embodiment of the present invention, Figure 2 is a partial perspective view of the stylet constituting the biopsy needle according to the present invention, Figure 3 is a stopper constituting the biopsy needle according to the present invention It is a cross section of.

As shown in the drawing, the biopsy needle according to the present invention comprises a hub 10 having a through space 12 formed therein; Sheath 20 extending to a predetermined length from one side of the hub (10); And a stylet 30 inserted into the sheath 20 through the through space 12, having a relatively longer length than the sheath 20, and having a shear bent in one direction.

First, the hub 10 is a portion that becomes the central body of the biopsy needle, made of synthetic resin material. The hub 10 is formed in a substantially cylindrical shape and may be made of a transparent material. A predetermined through space 12 is formed inside the hub 10, and the stylet 30 penetrates through the through space 12.

The sheath 20 extends by a predetermined length at the front end of the hub 10, and the sealing member 14 is coupled to the rear end. The sealing member 14 seals the space between the sheath 20 and the stylet 30 to prevent external air from entering the pulmonary blood vessel. To this end, the sealing member 14 is provided with a sealing material 16 which is a material such as rubber. A hole through which the stylet 30 penetrates is formed in the center of the sealant 16, and the sealant 16 seals the through space 12 from contact with outside air. As the sealant 16 is provided in this way, even when the stylet 30 is moved back and forth, external air does not flow into the through space 12 of the hub 10. The sealing member 14 may be screwed to the outer surface of the hub 10 because the thread is formed on the inner surface.

The sheath 20 is made of a hollow thin tube. The stylet 30 which is elastically deformable is inserted into the sheath 20, and the sheath 20 wraps around the stylet 30 to protect it from the outside and is made of a thin thickness so that the stylet 30 is easily bent by external force. ) Increases the stiffness.

Since the stylet 30 has a long length as described above, as shown in FIG. 1, the shear is exposed to the rear of the hub 10 by a predetermined length while the shear is slightly exposed to the outside of the sheath 20.

In addition, the front end of the stylet 30 is preferably formed to be bent in one direction as shown in FIG. This is to easily adjust the direction of the stylet 30 guided to the wrong position. Since the front end of the stylet 30 is formed to be bent, the operator rotates the stylet 30 in the direction to be adjusted and then inserts the stylet 30 in the bent direction to guide the correct position. In other words, the biopsy needle is divided into several stages to be inserted into the target little by little. At this time, the direction of the biopsy needle is checked by an imaging test and then redirected to the target. In addition, the guide surface 32 is inclined at the tip of the stylet 30.

On the other hand, the rear end of the stylet 30 is provided with an adjusting unit 34 for the operator to grip and adjust by hand. The adjusting unit 34 is fixed to the rear end of the stylet 30, and a plurality of grooves may be formed on the outer surface to increase frictional force.

In addition, since the stylet 30 is formed longer than the sheath 20, the stopper 40 is coupled to surround the stylet 30 extending to the outside (rear) of the hub 10. The stopper 40 is coupled to surround the stylet 30 so that the stylet 30 formed longer than the sheath 20 is fixed without being moved back and forth. To this end, the front end of the stopper 40 is caught by the hub 10, and the rear end is hanged by the adjusting unit 34 to prevent flow.

The stopper 40 normally remains coupled to the stylet 30 and prevents the stylet 30 from being pushed backward in the initial insertion stage. Separated and serves to reorient the stylelet 30 only. The stopper 40 may be coupled in various ways. For example, as shown in FIG. 3, the stopper 40 may be partially cut and made of an elastic material. The stopper 40 made as described above may be coupled to the stylet 30 by opening the cut portion.

Hereinafter, the biopsy process of the biopsy needle according to the present invention having the configuration as described above will be described.

4 and 5 is an exemplary view showing that the procedure with a biopsy needle in accordance with an embodiment of the present invention.

Referring to Figure 4, the operator inserts the sheath 20 and the stylet 30 together through the chest wall (W) toward the lung (L). At this time, the stopper 40 maintains the state coupled to the stylet 30 to prevent the stylet 30 from being pushed backwards by the skin. During the insertion process, if the operator observes the insertion direction through CT or the like, and it is determined that it is inserted in the wrong direction, it is necessary to readjust the direction. At this time, the operator separates the stopper 40 from the stylet 30 as shown in FIG. 5 and rotates the stylet 30 in a desired direction. That is, for example, if it is to be inserted in the direction of the center of the lung (L), the bent shear of the stylet 30 is rotated to face the center of the lung (L).

Then, when the operator inserts the stylet 30, the stylet 30 is naturally inserted along the curved direction, so that the readjustment can be easily performed toward the lung L side. In addition, since the movement of the stylet 30 itself is not limited by the sheath 20, it is possible to adjust the operator more easily.

As described above, the biopsy needle according to the present invention has an advantage that the procedure can be performed at a time without the need to remove the biopsy needle in the middle of the adjustment of the operator is simple.

The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.

10 hub 12 through space
14 sealing member 16 sealing material
20: Sheath 30: Stylet
32: guide surface 34: adjustment unit
40: stopper

Claims

A hub having a through space formed therein;
Sheath extending to a predetermined length from one side of the hub; And
And a stylet inserted into the sheath through the through space, the stylet having a relatively longer length than the sheath, and having a front end bent in one direction.

The method of claim 1,
Biopsy needle, characterized in that the rear end of the stylet is provided with an adjusting unit for adjusting by the operator gripping by hand.

The method of claim 2,
And a stopper coupled to surround the stylet extending outwardly of the hub and positioned between the hub and the adjustment part.

The method of claim 3, wherein
The stopper is partially cut along the longitudinal direction, characterized in that the biopsy needle is made of an elastic material.

The method of claim 1,
A biopsy needle, characterized in that the front surface of the stylet is formed inclined guide surface.

6. The method according to any one of claims 1 to 5,
And a sealing member coupled to the hub to block the through space from the outside air.

The method according to claim 6,
And the sealing member is provided with a sealing material through which the stylet penetrates.