During a venipuncture, if a hematoma develops at the insertion site, what is the correct action?

Applying pressure to the site for a minimum of five minutes is the correct action when a hematoma develops during venipuncture. This technique helps to control the bleeding and facilitates coagulation by applying direct pressure over the affected area, which minimizes the size of the hematoma and encourages the blood to clot effectively.

Maintaining firm pressure for a sufficient duration is crucial in managing the situation and preventing further complications. It's important to assess the patient's comfort and ensure that the pressure is consistent during the time needed for the blood to clot.

In contrast, reducing the amount of pressure applied may worsen the bleeding, and failing to apply sufficient pressure can exacerbate the hematoma. Notifying the physician immediately may not be necessary, especially if the hematoma is minor and manageable. Additionally, removing the needle and applying ointment is not appropriate in this situation, as ointment does not address the underlying issue of bleeding at the venipuncture site.