kapillárblóðsúrtaka

Kapillárblóðsúrtaka, also known as capillary blood sampling, is a method of collecting a small amount of blood from the tiny blood vessels called capillaries. These capillaries are typically found just beneath the skin's surface. This technique is commonly used for routine diagnostic tests that require only a minimal blood volume.

The procedure involves making a small puncture in the skin, usually on a fingertip, heel (in infants), or earlobe, using a sterile lancet. A drop of blood then emerges from the puncture site, which is collected into a capillary tube, microcontainer, or directly onto a testing strip. Anticoagulants are often present in the collection devices to prevent clotting.

Kapillárblóðsúrtaka is advantageous due to its minimally invasive nature, reduced pain, and the small sample size required. This makes it suitable for pediatric patients, individuals with difficult venous access, and for point-of-care testing where rapid results are needed. Common tests performed using capillary blood include blood glucose monitoring, hemoglobin levels, and certain newborn screening tests.

While generally safe, potential risks include minor bruising, infection at the puncture site, or nerve damage if the puncture is too deep, particularly in infants. Proper technique and sterile equipment are crucial to minimize these risks. The collected sample is then analyzed in a laboratory or using a portable device.