What is the difference between capillary blood and venous blood

The most common reason for collection of arterial blood is the evaluation of arterial blood gases. Arterial blood may be obtained directly from the artery most commonly, the radial artery by personnel who are trained to perform this procedure and are knowledgeable about the complications that could occur as a result of this procedure. Arterial blood may also be obtained from a vascular access device VAD inserted in an artery such as a femoral arterial line or catheter.

Capillary Blood Capillary blood is obtained from capillary beds that consist of the smallest veins venules and arteries arterioles of the circulatory system. The venules and arterioles join together in capillary beds forming a mixture of venous and arterial blood. The specimen from a dermal puncture will therefore be a mixture of arterial and venous blood along with interstitial and intracellular fluids.

Capillary blood is often the specimen of choice for infants, very young children, elderly patients with fragile veins, and severely burned patients. Point-of-care testing is often performed using a capillary blood specimen. Also covered will be specific use cases and advantages to using capillary sampling for infants and children, as well as circumstances and specific tests where capillary blood provides advantages over venous blood in adult patients.

Brad Karon, M. This series is appropriate for phlebotomists, phlebotomy managers, phlebotomy educators, and other patient-care staff involved in specimen collection. This program has been approved for a maximum of 1. GA category weeks Source of blood Anaemia in pregnancy value O. Table 2. Association between prevalence of anaemia and source of blood. Table 3. Disparity between anaemia from capillary and venous blood PCV. References B. Koos and P.

Alan and N. Lauren, Eds. View at: Google Scholar N. View at: Google Scholar C. Dim and H. Baskurt, O. Yalcin, F. Gungor, and H. View at: Google Scholar L. Daae, S. Halvorsen, P. Mathisen, and K. Daae, M. Hallerud, and S. View at: Google Scholar Z. Yang, S. Yang, L. Chen, J. Qu, J. Zhu, and Z.

Dim, E. Ugwu, and E. View at: Google Scholar R. Nneli and J. View at: Google Scholar U. Nwagha, O. Ugwu, T. Nwagha, and U. View at: Google Scholar H. Onah, S. Obi, and S. Dim, A. Ikeme, H. Ezegwui, and U. Perkkio and R. Carr and L. Supplementum , vol. View at: Google Scholar P. Silversides and J.