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.
saline lock An intravenous portal, usually placed and left in a vein in one of the patient's arms, and used episodically for fluid or medication infusions. Salt water flushes are used to maintain its patency. Saline locks replaced heparin locks in the 1990s because of cost and efficacy and because heparin locks posed a rare but unacceptable risk of heparin-related allergies, esp. heparin-related thrombocytopenia.