What is the preferred duration for sitting or supine lying during phlebotomy?

• A. 5-10 minutes
• B. 10-15 minutes
• C. 15-20 minutes
• D. 20-25 minutes

Answer: (C)

After a blood draw, keeping the patient seated or lying down for a period helps catch and prevent fainting and other adverse reactions. The recommended window is about 15-20 minutes. This duration covers the time frame in which vasovagal reactions often begin, especially in anxious or dehydrated individuals, while still allowing the patient to recover in a safe position. Lying or sitting during this interval improves venous return, reducing the likelihood of dizziness or syncope immediately after puncture and giving time to apply pressure to the site and ensure hemostasis. Shorter windows, like 5-10 or 10-15 minutes, may miss late-developing symptoms, whereas longer periods (20-25 minutes) are usually not necessary for routine draws unless the patient has specific risk factors.