American Medical Technologist (AMT) Practice Exam

When blood is collected, applying pressure to the site is an important step to minimize the risk of hematoma formation. However, having the patient bend their elbow to apply this pressure can inadvertently increase the likelihood of developing a hematoma. This is because bending the elbow can compress the veins and lead to increased pressure at the puncture site. If the vein is punctured but not adequately sealed, blood can leak into the surrounding tissues, resulting in a hematoma.

In contrast, using a larger gauge needle may actually allow blood to flow more efficiently and reduce trauma to the vein when done correctly. Performing the procedure at a different angle is sometimes necessary based on the anatomy of the patient's veins and is not inherently a risk factor for hematoma if done skillfully. Similarly, butterfly needles are designed for better maneuverability and less trauma during blood collection, making them a favorable choice in many situations. Thus, while applying pressure is important, the method of doing so – such as bending the elbow – can contribute to hematoma formation.