California Phlebotomy Certification Practice Exam

Hematoma formation is a common complication of phlebotomy that occurs when blood leaks out of the blood vessel into the surrounding tissue during or after the needle is withdrawn. This leakage can happen if the needle is not properly placed within the vein, or if there is excessive movement during the procedure, which may cause damage to the vessel wall. The accumulation of blood creates a localized swelling or bruising known as a hematoma. Other complications, while they can occur, are less common in comparison. For example, arterial puncture, although a serious complication, is not typically the most frequent issue encountered during venipuncture in routine settings. Similarly, vasovagal syncope, which is fainting that may occur due to anxiety or the sight of blood, can occur but tends to happen less frequently than hematoma formation. Allergic reactions are also possible but are much rarer in the context of phlebotomy procedures specifically related to the puncture itself. Thus, the prevalence of hematoma formation makes it a key complication that practitioners must be aware of during the phlebotomy process.