MEDICAL INJECTION DEVICE WITH GAS EVACUATION

Abstract: an injection device for injecting a medical liquid, comprising a piston arranged within an inner space delimiting an upper space and a lower space, an evacuation path, said evacuation path traversing the piston the lower space to the upper space of the inner space, a selector between a lower portion and an intermediate portion of the evacuation path, configured for selectively allowing the gas to go through and preventing the medical liquid from going through said selector, a purge valve between the intermediate portion of the evacuation path and an upper portion of the evacuation path and configured for moving between a blocking and a passing configuration which requires an overpressure in the intermediate portion caused by the piston travelling towards the lower end of the body.

Inventor(s): Ludovic ALLARD

CPC Classification: A61M5/3146 (DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals ; means for inserting tampons ; devices for administering food or medicines orally ; containers for collecting, storing or administering blood or medical fluids ); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery ; chemical aspects of surgical articles ); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents )})

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