What is the primary purpose of applying pressure to the venipuncture site?

The primary purpose of applying pressure to the venipuncture site is to stop bleeding. After a needle is removed from a blood vessel, the application of pressure helps to constrict the blood vessels at the puncture site, which aids in clot formation and reduces the risk of excessive bleeding. This practice is essential in ensuring patient safety and minimizing complications post-venipuncture. Properly applying pressure for an adequate amount of time also helps prevent hematoma formation, which is a localized collection of blood outside of the blood vessels.

While preventing bruising and helping to speed up blood collection are relevant considerations, they are secondary to the main objective of stopping any bleeding that occurs after a venipuncture. Additionally, ensuring proper evacuation refers to the effective drawing of blood into collection tubes but is not directly related to the immediate action needed after the puncture.