What is the significance of cleaning the site with 70% alcohol prior to a capillary collection?

Cleaning the site with 70% alcohol prior to a capillary collection is significant primarily because it helps to reduce the risk of contamination. The application of alcohol serves to disinfect the skin by killing or inhibiting the growth of bacteria and other microorganisms that could interfere with the accuracy of the test results or lead to infection at the puncture site.

Using 70% alcohol is preferred over higher concentrations because it allows for better penetration of the cellular membranes of pathogens while ensuring effective disinfection. Additionally, the alcohol evaporates relatively quickly, decreasing the likelihood of irritation while allowing a sterile environment for the capillary collection.

The other options do not accurately reflect the main purpose of cleaning the site with 70% alcohol. While enhanced blood flow, prevention of hemolysis, and cooling the skin may have some relevance in practical settings, they do not directly relate to the primary objective of maintaining aseptic technique and minimizing contamination risk in laboratory procedures.