| 摘要 |
A medical needle which can greatly reduce the pains involved in creating a puncture, avoid subcutaneous bleeding and damage to blood vessel walls by preventing wrong puncture, eliminate the possibility that coring may occur, causing further damage to the living tissue and a part of the living tissue to flow into a blood vessel, can prevent occurrence of infection accidents due to wrong puncture, and thus can assure a high level of safety of health-care workers. A medical needle ( 10 ), comprising a solid rod-like inner needle ( 20 ) which is inserted into the living tissue, and a hollow cylindrical outer tube needle ( 30 ) which is inserted into the living tissue together with the inner needle ( 20 ), with the inner needle ( 20 ) being inserted thereinto, and is retained in the living tissue after the inner needle ( 20 ) is removed, wherein the tip portion of the inner needle ( 20 ) extending out of the front end bore of said outer tube needle ( 30 ) is formed as a spherical crown portion ( 24 ) which is capable of being inserted along a punctured hole previously formed in the living tissue so as not to damage the lumen of the punctured hole.
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