What should a phlebotomist do immediately if an artery is punctured instead of a vein?

When a phlebotomist accidentally punctures an artery instead of a vein, the immediate action should be to apply pressure to the site. This is crucial because puncturing an artery can lead to arterial bleeding, which is typically more severe than venous bleeding. Applying pressure helps to control the bleeding and prevent significant blood loss.

The pressure should be applied directly over the puncture site, using adequate force to promote clotting and minimize the risk of complications. It's important for phlebotomists to be trained in recognizing the difference between arterial and venous punctures, as well as knowing the appropriate steps to take in case of an emergency.

The other choices do not prioritize patient safety or the immediate need to stop the bleeding, which is why applying pressure is the correct response. Ignoring the situation could result in serious consequences, while informing the patient that it’s normal could lead to unnecessary anxiety and misinformation. Checking the puncture site after 15 minutes without taking immediate action is also inappropriate, as it could allow for excessive blood loss during that time frame.