JP2002248094A - Injection needle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injection needle the leading end of which is made hard to adhere to the inner wall of a blood vessel at the time of sampling of blood. SOLUTION: The leading end 1 of the injection needle is processed to form a recessed part 2 and chamfering 3 is applied to the inner surface of the recessed part 2 to extend the same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of processing a tip of a syringe needle into a concave shape to prevent the inner wall of a blood vessel from adsorbing to the tip of the syringe needle when collecting blood.

[Prior art]

In the conventional injection needle, during blood collection or intravenous injection, the tip of the injection needle sticks to the inner wall of the blood vessel, and troubles such as inability to collect blood occur. Therefore, the patient was distressed by piercing the blood vessel wall.

[0003]

[Problems to be solved by the invention]
And doctors had to repeat their blood sampling experience. The present invention was invented in order to respond to the need for an injection needle that eases the pain of a blood collector during such blood collection.

[0004]

Now, the structure thereof will be described. (A) A concave portion (2) is formed in the tip (1) of the injection needle. (B) The inside of the concave portion (2) was chamfered (3). Process the injection needle (4) as above

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will now be described in view of the problems of the prior art. The injection needle 4 is stopped inside the inserted blood vessel, and the blood is collected by suction with the syringe 5. Therefore, by processing the tip 1 of the injection needle 4 attached to the syringe 5 like the concave portion 2 and the chamfer 3, the inner surface of the opening at the tip becomes wide and smooth,
The inner surface of the blood vessel is hardly adsorbed to the injection needle 4, the pain of the blood collector can be relieved without penetrating the blood vessel, and the object can be achieved.

[0006]

As described above, at the time of blood collection, the tip of the injection does not easily adhere to the inner wall of the blood vessel, does not penetrate the blood vessel, can ease the pain of the blood collector, and can collect blood in a short time.

[Brief description of the drawings]

FIG. 1 is a sectional view of the present invention.

FIG. 2 is another cross-sectional view of the present invention.

FIG. 3 shows an embodiment according to the present invention.

FIG. 4 is a top view of the tip of a conventional injection needle.

FIG. 5 is a sectional view of a conventional injection needle.

FIG. 6 shows a usage example using a conventional injection needle.

FIG. 7 is a front view of a syringe;

[Explanation of symbols]

 1 is the tip of the injection needle 2 is the concave portion 3 is the chamfer 4 is the injection needle 5 is the syringe

Claims (2)

[Claims] 1. An injection needle with a concave-shaped tip. 2. An injection needle whose inner surface of a concave portion is chamfered and widened.