ASCP Phlebotomy Technician Certification Practice Exam 2025 – Comprehensive All-in-One Study Guide for Success!

When blood flow stops during a venipuncture procedure, checking for proper needle placement is essential because it allows the phlebotomist to determine if the needle is still correctly positioned within the vein. Proper placement is critical for successful blood collection, and if the needle has moved out of the vein or is resting against the wall of the vein, blood flow can be interrupted.

By assessing needle placement, the phlebotomist can decide on the next steps: whether to adjust the needle slightly to re-engage the vein or to remove it and start over if the situation does not improve. This step is crucial because it ensures both the integrity of the procedure and patient comfort.

Other options have their contexts, but they do not directly address the immediate concern of ensuring that the needle is correctly placed for blood flow to resume. For instance, changing the needle angle without checking placement may worsen the situation, and applying more pressure with the tourniquet can lead to patient discomfort and potential complications. Removing the needle to start over might be necessary, but before doing so, it is best to verify the current needle position to avoid additional unnecessary punctures.