Automatic syringes
OwnerWilmer L Sibbitt, JR., Randy R. Sibbittinventors
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Abstract
The present invention provides automatic syringes that can be held with one hand in a pencil-grip in which the fingers (thumb or index finger) operate a forwardly based valve that along with selection of needle diameter and length, control the ingress or egress of fluid from the automatic syringe. These finger-controlled one-handed automatic syringes can be used in image-directed procedures such as ultrasound (sonography)-directed procedures in which the ultrasound probe is controlled with one hand and the automatic syringe with the other, although many other applications are readily apparent to those skilled in the art including biopsy, epidural injections, administration of anesthesia, and detection of blood vessels and body cavities as well as other applications.
Claims28
1) A syringe that can aspirate and can inject, comprising:
- a) a barrel having a needle fitting mounted with a first end and finger flanges mounted with a second end;
- b) a plunger subsystem comprising a plunger body having a first cross-sectional area suitable for disposition within the barrel;
- a plunger flange providing a thumb rest mounted with a first end of the plunger body;
- a stopper-seal complex mounted with a second end of the plunger body and configured to slidingly engage and seal with the barrel when the plunger body is disposed within the barrel and having a cross-sectional area;
- c) a mechanical locking mechanism that reversibly engages the plunger subsystem and the barrel such that motion of the plunger subsystem relative to the barrel is inhibited when the locking mechanism is engaged and allowed with the locking mechanism is disengaged.
7) A syringe as in claim 7, wherein the finger-operable valve is chosen from the group consisting of a slide valve, a modified stopcock, a turn cock, a return valve, a pinch valve, and a pin valve.
Dependencies are inferred from the claim text.