![]() ![]() ![]() ![]() Clinical and Laboratory Standards Institute (CLSI) and American Association for Respiratory Care (AARC) published the guidelines for blood gas analysis which were not described the blood collecting procedure in syringes washed with liquid heparin, but they warned the combine effects from together dilutional and chemical effects of liquid heparin to blood gas tests ( 7, 8).ĭespite all these publications, we have frequently observed the nonstandardized blood gas sampling with liquid heparin (especially using different volumes syringes, different sizes needles and collecting different sample volume) is used for patient’s comfort, easier application or ignorance about the effects. Also, International Federation of Clinical Chemistry (IFCC) recommended for blood gas sampling to fill dead space of the syringe with heparin, to lubricate the inner wall of the syringe, to expel the excess anticoagulant and to collect the least 20 times the dead space volume of blood ( 6). Some researchers notified recommendations about standardized blood collection into syringes washed with liquid heparin ( 4, 5). But, heparinized blood collection for blood gas analysis in some clinics or hospitals is still preferred in plastic syringes with liquid heparin instead of syringes with dry heparin due to economical and traditional reasons. Fifty years ago, some researchers first reported that collection of blood gas samples into the syringe with liquid heparin caused dilutional error ( 1– 3). ![]()
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