Discard volumes necessary for clinically useful coagulation studies from heparinized Hickman catheters.

摘要: Purpose/objectives Determine the blood volume that must be wasted to obtain a clinically useful prothrombin time (PT), activated partial thromboplastin (APTT), and fibrinogen concentration for drawn from heparinized (2.5 ml of 100 units/ml), double-lumen venous catheter. Design Prospective, nonrandomized study comparing test results obtained samples through catheters with those via peripheral venipuncture. Patients acted as their own control. Setting Inpatient outpatient units cancer research center located in mid-Atlantic city United States. Sample Twenty 10 Fr. Hickman (Bard Access Systems, Salt Lake City, UT) were studied 20 adult patients who had no history coagulation disorders. Methods Samples collected red lumen heparinized, after 5, 10, 15, 20, 25 first discarded. PTs, APTTs, concentrations measured on each sample. The compared derived simultaneously Main variables PT, APTT, values discards samples. Findings using always within normal range except one slightly elevated APTT. After discard, all PTs 95% APTTs catheter therefore useful. Conclusions Clinically often can catheter-drawn when objective is confirm coagulation. However, because it very difficult heparin-free catheters, should testing totally sample needed make critical clinical decision. Implications nursing practice These findings provide important information nurses have decide whether draw tests Further larger varied populations (e.g., pediatrics) made different materials calibers.