Hypodermic cannula

Details Hypodermic cannula Hypodermic cannula

A - Human Necessities

61

B

A61B 17/34 (2006.01) A61M 5/158 (2006.01) A61M 5/32 (2006.01) B21G 1/08 (2006.01)

Patent

CA 2181003

A tissue penetrating cannula comprises a tube having a sharp end formed by a first cut surface defining an acute angle to the longitudinal axis of the tube and forming a generally oval tube edge defining a similar acute angle to the longitudinal axis. A second cut surface is defined along a right hand forward portion of the oval tube edge, and a third cut surface is defined along a left hand forward portion of the oval tube edge. A second and third cut surfaces define between them a forward cutting surface in the tube edge. A fourth cut surface at the point intersects the second and third cut surfaces to cause the cutting surface to be spaced inwardly of the tube outer wall.

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