What is a common complication that can occur during venipuncture?

Fainting, also known as syncope, is a common complication that can occur during venipuncture. This phenomenon is often attributed to a combination of factors, including anxiety, fear of needles, or the sight of blood. During venipuncture, when a needle is inserted into a vein, some individuals may experience a sudden drop in blood pressure or an adverse physiological response, leading to lightheadedness or fainting. This reaction can be particularly pronounced in patients who are already anxious about the procedure.

In contrast, leukocytosis, which refers to an increase in white blood cell count, typically results from underlying medical conditions or stress rather than from the act of venipuncture itself. Hypertension, or high blood pressure, while it can be a concern in various medical procedures, is not a direct complication commonly associated with venipuncture. Understanding the potential for fainting can help healthcare providers take measures to minimize the risk, such as ensuring the patient is seated comfortably and monitored during the procedure.