Capillary Tubes

Capillary Blood Collection

Capillary blood collection plays an important role not only in paediatrics, but also in all other health care disciplines. It is used for all laboratory analyses for which smaller amounts of blood are sufficient and, in contrast to blood collection from the arteries, which is considered extremely invasive, is significantly gentler on the patient's skin.

Blood is usually collected from the lateral fingertip, the earlobe or, in the case of small children and infants, often from the heel. These parts of the human body are very well supplied with blood and have numerous capillary vessels. A sterile lancet is used to puncture the smallest blood vessels at the appropriate site so that blood comes out of the puncture site. This blood is then drawn with a capillary blood collection tube suitable for the purpose of the examination and analysed subsequently.

Intended Use of Capillary Tubes

In our shop you will find a large selection of capillary blood collection tubes for various examinations in the medical laboratory. In medical practices and clinics, the use of capillaries to perform rapid tests is a common solution to collect the small amount of blood required for this purpose. For example, when measuring blood sugar or oxygen, small volumes are usually sufficient to provide a valid test result. This way, blood sampling from the vein, which is much more time-consuming and painful for patients, can be avoided. The capillary collection technique is particularly favourable in emergency situations or for children.

Conventional haematocrit capillaries made from glass such as those from the well-known manufacturer Hecht Karl are often heparinised to prevent blood clotting inside the tube. The haematocrit capillary tubes, heparinised with red colour code, are ungraded and have a volume of 40 µl and a length of approx. 75mm. The tubes feature fire-polished ends and have an inner diameter of 1.1-1.2 mm and an outer diameter of approx. 1.5 mm.

They are used to determine the volume fraction of erythrocytes in the blood and can be centrifuged, for example, in the iFuge HCT NXT haematocrit centrifuge suitable for this purpose. You will also find the necessary haematocrit sealing kit, 1 piece from the manufacturer Hecht Karl with sealing wax in a plastic pallet for sealing the glass capillaries in this category. By separating the individual blood components in the capillary tube and matching HKT evaluation cards, the value of the red blood cells can be measured in samples from the respective patients.

The capillary blood collection systems from Sarstedt offer the user a simple way of drawing capillary blood and collecting it at the same time. The capillary blood collection tubes are available with different preparations for different blood analysis methods. For example, the Microvette® 200 with end-to-end principle for obtaining 200 µl of capillary blood is available in glucose, haematology and serum versions. The system of the renowned manufacturer stands out with its functional and well-thought-out workmanship. Due to the special design of the cap, a safe and audible closure and opening of the Microvette® withdrawal systems is ensured under a reduced aerosol effect. In addition, they are equipped with a physical mixing aid to ensure uniform mixing of the blood sample with the corresponding reagent.

Order Capillary Tubes and Accessories Online at a Great Price

Whether EDTA blood collection tubes, tubes for determining the haematocrit value in the blood, for measuring CRP using a rapid test or for blood gas analysis - in our range you will find a large selection of capillary tubes for various purposes.

Do you have questions about our capillary tubes or the laboratory supplies listed in this category? Our friendly customer service will be happy to help you. Contact us via mail, phone or convenient live chat.