WO2001066177A1

WO2001066177A1 - Diagnosis or therapy puncture needle

Info

Publication number: WO2001066177A1
Application number: PCT/JP2000/001376
Authority: WO
Inventors: Akio Higuchi; Hayato Hyugaji
Original assignee: Dr. Japan Co., Ltd.
Priority date: 2000-03-08
Filing date: 2000-03-08
Publication date: 2001-09-13

Abstract

A hollow puncture needle for diagnosis or therapy through which a guide wire is passed without any fear of damage even if the guide wire projected from a knife opening touches the inner rear edge of the knife opening. A hollow puncture needle (1, 1a) having a guide wire (10, 10a) therein which can project from a knife opening (2, 2a) the front edge (6, 6a) of which is sharp and the inner rear edge (8, 8a) of the rear edge (4, 4a) of which is cut at right angles or at an angle approximate to the right angle to have a three-dimensional shape.

Description

Description puncture needle for diagnosis or treatment

TECHNICAL FIELD The present invention relates to a puncture needle used for inserting a guidewire, a tube, or the like into an internal organ or a blood vessel. Background art

Puncture a hollow puncture needle into an internal organ or blood vessel, insert a guidewire, tube, etc. into the puncture needle and send it to a specific site while observing the tip of the guidewire, tube, etc. with an ultrasonic image, etc. Diagnosis and treatment of collecting tissue at the specific site or administering to the specific site

The conventional puncture needle used for this diagnosis and treatment has a linear or curved tip, and as shown in FIGS. 5 and 6, a hollow tube made of stesilless steel is connected to an axial center line. The shape is cut at a plane that intersects at an acute angle of 7Γ / 4 radian (45 degrees) or less. Except for the front end 16 that is ground on both sides to facilitate puncturing, the opening blade surface 12 has a hollow elliptical planar shape, and the inner rear end 18 of the opening blade surface 12 has an acute angle. Cutting edge angle. For this reason, there is a problem that the guide wire 10 inserted through the puncture needle 11 and protruding from the opening blade surface 12 may be damaged if it comes into contact with the inner rear end 18 of the opening blade surface 12 during operation. was there. For example, Teflon coating is applied to guide wire 10 etc. to improve sliding, but when guide wire 10 etc. comes in contact with the inner rear end 18, the coaching peels off and operation becomes impossible. Often it was smooth. Also, guide wires 10 etc. may be damaged and cut. There was. Disclosure of the invention

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a puncture needle for projecting from an opening blade surface by inserting a guide wire, a tube, or the like for diagnosis and treatment. It is an object of the present invention to provide a wire, a tube, and the like that are not damaged even if they come into contact with the inner rear end of the opening blade surface during operation.

Means adopted by the present invention to achieve the above object is that the opening blade surface of the puncture needle has a three-dimensional shape, and the cutting edge angle at the inner rear end of the opening blade surface is a right angle or an angle close thereto. .

When the puncture needle is horizontal and the opening blade surface is facing upward, the front half of the opening blade surface crosses the plane oblique to the axis, and the rear end crosses the axis at a right angle or close to it. Each part is located on a plane, and the part from the front half to the rear end is located on an S-shaped curve where both ends are bent in reverse when viewed from the side. A guide wire, a Ube, or the like protruding from the opening blade surface of the puncture needle comes into contact with the inner rear end of the opening blade surface during operation, but the inner rear end of the puncture needle of the present invention has a right angle or a cutting angle. Since the angle is close to that, the sharpness is dull, and there is little risk that the contacting guide wire or tube will be stripped of the surface coating or damaged by the inner rear end of the open blade surface. As described above, the puncture needle of the present invention is easy to puncture because the front end of the opening blade surface is sharp, but the cutting edge angle at the inner rear end of the opening blade surface is a conventional acute angle. In contrast to this, it is a right angle or an angle close to it, and does not act as a cutting blade.Therefore, a guide wire, tube, etc. that is inserted through a puncture needle and protrudes from the blade surface for diagnosis and treatment is opened during operation. Even if the abutment comes into contact with the inner rear end of the blade surface, It has an excellent effect that there is no risk of damage or amputation affecting diagnosis and treatment. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a plan view showing a puncture needle tip of the first embodiment of the present invention, FIG. 2 is a cross-sectional view of the puncture needle tip of FIG. 1,

FIG. 3 is a diagram corresponding to FIG. 1 of the second embodiment,

FIG. 4 is a cross-sectional view of the tip of the puncture needle of FIG. 3,

FIG. 5 is a plan view of a tip portion of a conventional puncture needle,

FIG. 6 is a cross-sectional view of the tip portion of the puncture needle in FIG. 5, the best mode for carrying out the invention.

A puncture needle according to the present invention will be described based on a first embodiment shown in the drawings.

FIG. 1 and FIG. 2 are a plan view and a vertical sectional view showing a distal end portion of the puncture needle of the first embodiment.

The puncture needle 1 shown in FIG. 1 has a linear tip. When the piercing needle 1 is horizontal and the opening blade surface 2 is directed upward, the front half 3 of the three-dimensional opening blade surface 2 has a wide semi-elliptical shape. However, both sides of the front end 6 are ground and the outer front end 7 is sharply finished. The rear end portion 4 of the open blade surface 2 is a straight line having no width extending in a direction perpendicular to the axis 9 of the puncture needle. The two intermediate portions 5 extending from the front half 3 to the rear end 4 extend from the rear end of the front half 3 in a straight line having a width parallel to the axis 9 and bend in an arc shape, and are accommodated in the rear end 4. I do.

When viewed from the side, the opening blade surface 2 is a diagonal line that intersects with the axis 9 at an acute angle of 7 以下 / 4 radian (45 degrees) or less, as shown in Fig. 2, and The end 4 is a perpendicular extending to the axis 9. First half 3 and rear The middle part 5 connecting the end parts 4 is an S-shaped curve, the part continuing from the first half part 3 is loosely bent, then extends horizontally in a straight line, and then connects to the rear end part 4 by drawing a quadrant arc . The front end 6 of the opening blade surface 2 is ground, and the outer front end 7 has a sharp cutting edge angle, and is sharp after finishing. Since the cutting edge angle of the inner rear end 8 of the opening blade surface 2 is a right angle, it does not act as a cutting edge after finishing.

The guide wire 10 protruding from the opening blade surface 2 often comes into contact with the inner rear end 8 of the opening blade surface 2 during operation, but as described above, the cutting edge angle of the inner rear end 8 is a right angle. Since it does not act as a cutting blade, there is almost no risk that the surface of the guide wire 10 or the like will peel off due to contact with the inner rear end 8 and the operation of the guide wire 10 or the like will not be smooth. Also, there is no possibility that the guide wire 10 or the like abuts on the inner rear end 8 and is cut or damaged.

FIG. 3 and FIG. 4 are a plan view and a vertical sectional view showing a main part of a puncture needle 1a according to a second embodiment. The puncture needle 1a has a curved tip, and the open blade surface 2a has a three-dimensional shape. '

As shown in Fig. 3, when the opening blade surface 2a faces upward, the puncture needle la is horizontal, and viewed from above, the front half 3a of the opening blade surface 2a except for the front end 6a It is semi-elliptical with a width. The ground front end 6a forms an acute angle. The rear end 4a has a wide semi-elliptical shape. The middle part 5a between the front half part 3a and the rear end part 4a is two parallel straight lines having a width, and both ends smoothly connect to the front half part 3a and the rear end part 4a.

When viewed from the side, as shown in Fig. 4, the first half 3a of the opening blade surface 2a is a straight line that intersects the axis 9a at an acute angle of ΤΓ / 4 radian (45 degrees) or less. The front end 6a of the first half 3a is sharply ground. The rear end 4a of the opening blade surface 2a is a straight line extending in a direction orthogonal to the axis 9a. The middle part 5a from the first half 3a to the rear end 4a is an S-shaped curve whose both ends are smoothly connected to the first half 3a and the rear end 4a.

As shown in FIG. 4, the outer front end 7a of the opening blade surface 2a has a sharp cutting edge angle, and is sharp after finishing. Since the cutting edge angle of the inner rear end 8a of the opening blade surface 2a is a right angle, it does not act as a cutting edge after finishing. It is inevitable that the guide wire 10a protruding from the opening blade surface 2a will come into contact with the inner rear end 8a during operation, but the inner rear end 8a has a right angle cutting edge, and the cutting edge As in the first embodiment, the guider 10a and the like come into contact with the inner rear end 8a to peel off the coating, damage the surface, or cut the guide. There is no danger.

As an example, a puncture needle in which the cutting edge angle at the inner rear end of the open blade surface is a right angle has been described, but the cutting edge angle need not be limited to a right angle, and may be larger than a right angle. It is also possible to make the angle smaller than a right angle as long as no action occurs.

Claims

The scope of the claims

1. A puncture needle (1, la) for projecting a guide wire (10, 10a) or the like from an opening blade surface (2, 2a). When the puncture needle is horizontal and the opening blade surface is upward, The opening blade surface has a first half (3, 3a) intersecting at an acute angle with the axis (9, 9a) of the tip of the puncture needle, and a right angle or close to the axis with the axis. It has a three-dimensional shape consisting of a rear end (4, 4a) extending in a direction intersecting at an angle, and an intermediate part (5, 5a) having both ends smoothly connected to the front half and the rear end. The front half has a sharply ground front end (6, 6a), and the rear end has an inner rear end (8, 8a) with a cutting edge angle at or near a right angle. A diagnostic or therapeutic puncture needle.

2. The puncture needle for diagnosis or treatment according to claim 1, wherein the puncture needle has a linear tip.

3. The puncture needle for diagnosis or treatment according to claim 1, wherein the puncture needle has a curved tip.