Before the limited hardware warranty expires, please contact Microsoft Surface Support at 1-866-425-8880 (or replacement number(s) provided by Microsoft) or choose from the.standard business hours. The limited hardware warranty terms for your Microsoft Surface hardware unit are located in the Surface Order Form Terms and Conditions that you agreed to as part of the purchase of your Surface hardware unit.
heparin lock. A device attached to an intravenous catheter to prevent it from clotting. It is used for intermittent administration of fluids or medication. See: heparin lock flush solution; venous access device.
Heparin is a drug that works as an anticoagulant, which means that it prevents blood clots from forming and prevents existing blood clots from expanding. It was orginally extracted from the liver, but now it is mostly manufactured synthetically.eparin is measured in Units, but these units are not the same volume as the Units used to measure insulin or penicillin. Common concentrations of heparin are 1000 units per mL, 5000 units per mL, and 10,000 units per mL; these can be used for IM or s.q. dosing, or diluted in a diluent liquid for IV use.