A - Human Necessities – 61 – J
Patent
A - Human Necessities
61
J
A61J 1/06 (2006.01) A61L 33/00 (2006.01) B01L 3/14 (2006.01)
Patent
CA 2114093
ABSTRACT The present invention relates to a blood collection device for chemical analysis of plasma specimen. Said device is a test tube made of polyethylene terephthalate, etc., onto an interior wall of which anticoagulant, such as lithium heparin or sodium heparin, is applied by a spray coating process. Anticoagulant is applied onto an interior wall in the form of fine mist by a spray coating process using a carrier solvent, preferably water. The main advantages of the plastic tube with spray coated anticoagulant on the tube interior wall are more precise, stable, uniform and dry anticoagulant fill and improved dry anticoagulant dissolution into blood specimen. Because of the fine mist of anticoagulant, the actual surface area of anticoagulant exposed to blood is maximized. The precision of the anticoagulant fill is improved by tailoring the solution concentration and dispensed volume. That is, a high precision metering system can be used to deliver the solution to the spray coating system. This is the only method for precise and efficient use of heparin in a uniformly distributed manner. This method improves the delivery of the anticoagulant solution to a plastic tube, rectifies unprecise distribution of anticoagulant onto the wall of the tube and facilitates dissolution of anticoagulant, upon blood collection.
Becton Dickinson And Company
Gowling Lafleur Henderson Llp
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