Low drag syringe and cartridge

Details Low drag syringe and cartridge Low drag syringe and cartridge

A - Human Necessities

61

M

A61M 5/315 (2006.01) A61M 5/31 (2006.01)

Patent

CA 2189654

The invention provides a syringe comprising a barrel, a plunger and a plunger rod. The plunger can be deformed by the plunger rod to draw the radial walls of the plunger away from the inner wall of the barrel and thus reduce the friction between the plunger and the barrel, to facilitate injection. The deformation cam also be used to aspirate the syringe. The invention also provides a method of delivering a liquid medium into a patient using such a syringe.

L'invention concerne une seringue comprenant un cylindre, un plongeur et un axe de plongeur. Le plongeur peut être déformé par son axe pour que ses parois radiales s'écartent de la face interne du cylindre et réduisent ainsi la friction entre lesdits plongeur et cylindre, ce qui facilite l'injection. Cette déformation permet aussi d'aspirer le liquide dans la seringue. L'invention concerne aussi un procédé permettant d'administrer un liquide dans le corps d'un patient à l'aide d'une telle seringue.

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