More on Heparin Lock

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Abstract
To the Editor: One year ago we read in the correspondence columns of the Journal descriptions of two technics that are important to those responsible for setting up and maintaining access to peripheral veins in patients — the use of saline for local anesthesia before venipuncture and heparin solutions to maintain function of indwelling catheters (heparin locks).1 2 3 4 5 We decided to study these methods in two groups of young adults who were volunteers for pharmacokinetic studies.The first group received 0, 3.3, 16.5 and 132 units of heparin in bacteriostatic sodium chloride injection USP into either a Teflon catheter (Angiocath . . .
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