Title: Antiocoagulant metering device and method

Abstract: An aspiration wand assembly having an associated metering valve for metering liquid anticoagulant to blood aspirated by the wand. The metering valve includes a flexible diaphragm normally obstructing conduit which transmits anticoagulant from a remote source to the tip of the aspiration wand. An orifice communicates the diaphragm with the interior of the aspiration wand so that various negative pressures in the wand correspondingly draw the diaphragm into any one of a plurality of positions away from the obstructing position.

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Inventors: Reynolds, Gordon S. (Bountiful, UT, US)
Hansen, A. Boyd (Bountiful, UT, US)

Application Number: 555008
Filing Date: 1975-03-03
Publication_date: 1976-06-22
Assignee: Sorenson Research Co., Inc. (Salt Lake City, UT)
Primary Class(es): 604/269 604/902
Other Classes:
US Patent Ref:

2629399	Feb, 1953	Kulick	128/240.
2804075	Aug, 1957	Borden	128/277.
3335727	Aug, 1967	Spoto	128/276.
3769982	Nov, 1973	Schulte	128/350.
3807401	Apr, 1974	Riggle et al.	128/277.

Other Refs:
Primary Examiner: Truluck, Dalton L.
Assistant Examiner:
Attorney: Workman; H. Ross, Young; J. Winslow