Patent 5009634 Issued on April 23, 1991. Estimated Expiration Date: January 11, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
604/27, Material introduced into and removed from body through passage in body inserted means604/35, With aspirating or vacuum removing means604/83Treating material introduced directly into liquid stream path
A metabolic catheter and method which allows the simultaneous removal of body fluids from organs and immediate addition of stop solution to the body fluid at the catheter tip to prevent degradation of the metabolite to be measured.
Other References
Ontyd and Schrader, "Measurement of Adenosine, Inosine, and Hypoxanthine in Human Plasma", Journal of Chromatography, 307:404-409 (Netherlands, 1981