What is the primary reason for using gauze pads instead of cotton balls during capillary punctures?

Using gauze pads instead of cotton balls during capillary punctures is primarily favored because fibres from cotton balls can contaminate the specimen. In medical laboratory procedures, it is crucial to avoid any contamination that could affect the integrity of the sample being collected for analysis. The fibres from cotton can shed into the specimen, which could lead to inaccurate test results or data.

Gauze pads, on the other hand, are designed to provide a clean, sterile surface without leaving behind any fibres that might compromise the sample. They are also generally less likely to adhere to the skin or puncture site, permitting easier handling and a more comfortable experience for the patient while ensuring sample purity. This characteristic is especially important in clinical settings where obtaining an accurate blood sample is critical for diagnosis and treatment.