| 摘要 |
[PROBLEMS] A non tissue-destructive hollow needle not damaging the tissue of a needle inserting portion and an indwelling needle using the hollow needle. [MEANS FOR SOLVING PROBLEMS] A hollow needle is made from ceramic, has an outer diameter of 1-5 mm, and a wall thickness of 0.6-1.8 mm, and gives less damage to the tissue of a needle inserting portion. Worth noting is that the ceramic is zirconium and its oxide. The non tissue-destructive hollow needle can be used as a indwelling needle. The indwelling needle is constructed by inserting a resin straight fine needle, with chemical resistant and corrosion resistant properties, into the ceramic hollow needle, inserting the hollow needle, installed on the straight fine needle, into a hollow needle outer tube, and providing a connection tube, adapted for connection to an external extension tube, on the hollow needle outer tube. The connection tube is connected to the external extension tube through a connection ring. A fluorocarbon resin is suitably used as the chemical resistant, corrosion resistant resin.
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