What action can help prevent bruising after a blood draw?

Applying firm pressure and using a bandage after a blood draw is crucial in preventing bruising. When blood is drawn, a needle punctures the skin and may cause tiny blood vessels to break, leading to bleeding under the skin, which results in a bruise. By applying firm pressure to the site immediately after the needle is withdrawn, you help to control any bleeding that may occur. The pressure aids in sealing the puncture, thereby minimizing the chance of blood leaking into the surrounding tissue, which manifests as bruising.

Additionally, using a bandage covers the site, providing both physical protection and psychological reassurance to the patient. It also helps to keep the area clean and can prevent infection, though the primary focus in this context is the prevention of bruising through proper pressure application.

Other strategies, while they can support the post-draw process, are not as directly effective in minimizing bruising. Keeping the arm elevated may help with blood circulation, but it doesn't specifically address the immediate issue of bleeding at the puncture site. Instructing the patient to relax their arm can reduce muscle tension, which is beneficial, but it has little direct effect on preventing bruising from the puncture. Lastly, using a butterfly needle is typically associated with easier