Microcapillary blood collection tubes are small, disposable tubes used for collecting small quantities of blood. These tubes are usually made of glass or plastic and range in size from 1.5 to 10 microliters. The small size of these tubes makes them ideal for collecting blood from infants, young children, or patients with fragile veins.
These tubes come in a variety of colors, and each color represents a different type of additive used to facilitate specific laboratory tests. For example, a blue-topped tube contains sodium citrate, which is used for coagulation studies, while a lavender-topped tube contains EDTA, which is used for complete blood counts.
Microcapillary blood collection tubes are commonly used for point-of-care testing, such as glucose monitoring, pregnancy tests, and rapid diagnostic tests. They are also used for laboratory testing of blood gases, electrolytes, and various hormones.
The collection of blood into microcapillary tubes is typically achieved by using a lancet to puncture the skin and then squeezing the tube to create a vacuum that draws in the blood. Once the tube is filled, it is sealed with a removable cap and sent to the laboratory for analysis.
Overall, microcapillary blood collection tubes are a valuable tool in modern healthcare for collecting small samples of blood for laboratory testing.
