Hypodermic anesthetic injection apparatus and method

Details Hypodermic anesthetic injection apparatus and method Hypodermic anesthetic injection apparatus and method

A - Human Necessities

61

M

128/84

A61M 37/00 (2006.01) A61C 19/08 (2006.01) A61M 5/145 (2006.01) A61M 5/32 (2006.01) A61M 31/00 (2006.01)

Patent

CA 1329903

-35- ABSTRACT An aspirating hypodermic syringe and method for injecting dental anesthetic in which anesthetic flow through the needle is established independently of the fingers of the operator and in which different rates of flow are provided, including positive flow while the needle is entering the tissue. Effective aspiration in syringes which use expendable anesthetic vials is assured by means of a yieldable resistance member in a syringe which holds the vial with sufficient force to enable the syringe plunger to lock positively onto the piston of the vial.

568101

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