Squeeze-actuated syringe with position-selectable lock

Details Squeeze-actuated syringe with position-selectable lock Squeeze-actuated syringe with position-selectable lock

1985-12-23

1987-09-08

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

A61M 518

Patent

active

046921575

ABSTRACT:
A squeeze-actuated syringe includes a longitudinal body adapted to receive a collapsible ampul. A handle is attached by a hinge to one end of the body, the other end of which is adapted to receive a fitting on the ampul. The handle has a projection or pad on its underside in opposed relationship to the ampul received in the body. When the handle is squeezed toward the body, the ampul is compressed, discharging its contents through a hypodermic needle or the like attached to the fitting. A ratcheting lock mechanism on the handle and the body defines a plurality of selectable detented positions for the handle relative to the body. The handle can be stopped at any selected detented position, thereby allowing the contents of the ampul to be discharged in intermittent stages. In one embodiment, the ratcheting lock mechanism comprises a first serrated member on the body which is co-engageable with a second serrated member on the handle. In a second embodiment, the body carries a pair of laterally-opposed serrated members which are engageable by lateral flanges on the handle. In both embodiments, the ratcheting lock mechanism can be disengaged by flexing one or both of the serrated members. The invention can be used for aspiration by using an evacuated or empty ampul, and by gradually or intermittently lifting the handle off of the ampul using the ratcheting lock mechanism.

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