Injection needle - Chushabari (English spelling) injection needle

Japanese: 注射針 - ちゅうしゃばり（英語表記）injection needle

A needle attached to the end of a syringe. A thin metal tube with a blade shaped like a shaved bamboo. Needles for subcutaneous, intramuscular, and intravenous injections are approximately 2.5 to 3.5 cm long, those for intradermal injections are 1.3 cm, and the inner diameter of the tube is 0.6 to 0.7 mm for subcutaneous injections, 0.8 to 0.9 mm for intramuscular and intravenous injections, and around 1 mm for blood transfusions. In the days when needles were durable consumables rather than disposable as they are today, high-quality stainless steel was used. A stainless steel sheet is deep-drawn into a cup, which is then drawn into a thin tube, and the tip is then cut at an angle to finish it.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

注射器の先につける針。細い金属管の先を竹をそいだような形にして刃をつけたもの。皮下･筋肉･静脈注射用の針はおよそ長さ2.5～3.5cm，皮内注射用は1.3cm，管の内径は皮下注射用は0.6～0.7mm，筋肉･静脈注射用は0.8～0.9mm，輸血用には1mm前後のものが用いられる。現在のように使い捨てでなく耐久消耗品であった時代には，材質も高級なステンレス鋼を使用した。ステンレス鋼板を深絞りによってコップに成形し，さらにこれを引抜加工によって細い管とし，先端を斜めに切断して仕上げる。

出典　株式会社平凡社世界大百科事典第２版について　情報

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