| 摘要 |
An elongated tubular needle for injecting a fluid into a human body or retracting a fluid from the human body, comprising; a tubular needle cannula ( 1 ) having a skin piercing distal end ( 4 ), an opposite proximal end ( 5 ), and a tubular sidewall (2) there between having an outside diameter at the skin piercing end ( 4 ) which is smaller than the outside diameter at the opposite proximal end ( 5 ) thereof, and a cylindrical lumen ( 3 ) extending through the needle cannula ( 1 ) and having approximately the same uniform inside diameter through the needle cannula ( 1 ).
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