Читать книгу Fundamentals of Analytical Toxicology - Robin Whelpton - Страница 39

Arterial blood is normally collected by an experienced medical practitioner – it is a relatively dangerous procedure – for the measurement of blood gases and is rarely submitted for toxicological analysis. Capillary blood, which closely approximates to arterial blood, can be obtained by pricking the heel, finger or ear lobe; this procedure is most often performed on small children. Applying pressure to encourage blood flow will dilute the sample with tissue fluid.