JPS59160468A - Syringe needle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Regarding the pair of needles, the present invention is particularly characterized in that the injection needle is provided with a mark for confirming the direction of the cut surface of the needle tip.

A hypodermic needle is a thin tube that is attached to a syringe and used to inject an injection into a predetermined location in the human body, and has a sharp tip that makes it easy to insert into the human body.

The shape of the tip of this injection needle is that it is a thin tube, but it is cut diagonally into a so-called diagonal shape, so the needle will naturally bend in the direction in which the tip part curves and in the direction in which the injection liquid comes out. As a result, imbalance occurs. Therefore, when precision is required at the point where the injection solution is injected, such as intravenous injection or anesthesia injection, it is necessary to check the direction of the cut surface of the needle tip before injecting.

As an example, let's talk about infiltration anesthesia in dentistry. In dental medicine, infiltration anesthesia is used in many procedures such as tooth extraction, pulp extraction, and crown formation. Infiltration anesthesia requires the anesthetic to penetrate the entire periodontal ligament and into the alveolar bone. The surgical method involves inserting the tip of a needle between the alveolar bone and the periosteum.

In this case, it is important to bring the cut surface of the needle tip into close contact with the alveolar bone. Especially in the case of a surgical method called intraperiodontal ligament injection, the pressure is strong, so if the needle tip is oriented incorrectly, the fluid will This causes leakage and waste of chemical solution. In addition, in intraperiodontal ligament injection, since the periodontal ligament 1 is in close contact with the tooth 2, the insertion path of the needle tip is curved, so the needle 3 is placed in the insertion path as shown in Figure 1. It needs to be curved along.

However, as mentioned above, the needle tip is cut diagonally and has a spatula shape, so when inserting the needle with the cut surface 4 in contact with the tooth 2, the needle tip will follow the tooth in a straight line. However, if the cut surface 4 is oriented laterally to the tooth, for example, the needle 3 may be twisted and the needle tip may not reach a predetermined position.

From this point of view, when performing infiltration anesthesia, it is necessary to check the direction of the cut surface of the needle tip and direct the treatment in the specified direction, but this type of injection needle is thin and the cut surface It is difficult to check the needle tip, especially since many disposable ones are used these days.These are housed in a synthetic resin case and cannot be seen until the case is removed. It became even more difficult to confirm the future. There is no need to explain the reason for making injection needles disposable. - It is desirable from a safety standpoint, since there are cases where conventional disinfection methods are not sufficient, such as hepatitis and viruses. Furthermore, because only one use is required, the needle tip is sharp and does not cause pain to the patient, which has advantages, but it also has the disadvantage that it is difficult to confirm from outside the case.

The present invention has been made in view of the above-mentioned points, and it is possible to easily check the direction of the cut surface of the needle tip of a hypodermic needle, when attaching the needle to a syringe or when injecting. The surgeon can easily check the direction of the first cut surface,
This is designed to be oriented in a predetermined direction with respect to the affected area.

The present invention will be specifically described below based on illustrated embodiments. Reference numeral 3 in the figure is a needle. This is formed using a thin tube, and the tip is cut diagonally and has a sharp point. The figure shows an example, and the rear end is also pointed, passing through the joining member 5 for attachment. In order to make it easier to confirm the direction of the cut surface 4 of the needle tip of the injection needle formed in this way, an identification mark 6 is attached to the surface of the joining member 50 in the same direction as the cut surface 4 of the needle 3. .

The format of the identification mark 6 is not particularly limited. In short, it is sufficient that the orientation of the cut surface 4 of the needle tip can be determined by checking the mounting position of the identification mark 6 on the joining member 5. It is either completely formed or colored.

Furthermore, as mentioned above, the injection needle is housed in a case.
In particular, since the needle 3 is attached to the syringe with the sheath 7 still fitted, for example, as shown in FIG. Alternatively, the distal end portion 9 of the sheath 7 may be molded from a transparent material to form a convex lens so that the tip of the needle can be viewed in an enlarged manner. One way is to do so.

As detailed above, the present invention makes it easy to confirm the direction of the cut surface of the tip of the injection needle, thereby increasing the accuracy of injection.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the state of infiltrating anesthesia injection, FIG. 2 is a perspective view showing an embodiment of the present invention, and FIG. 3 is a longitudinal sectional view of the same. 3; Needle 4; Cut surface 5; Joining member 6; Identification, separate marking

Claims (1)

[Claims] A hypodermic needle consisting of a thin tube formed by cutting the tip of the needle diagonally and attaching a joining member to the base, with an identification mark attached to the joining member to confirm the direction of the cut surface of the needle tip. An injection needle characterized in that the identification mark is attached on the same surface of the joining member as the cut surface of the needle.