California Phlebotomy Certification Practice Exam

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What is the primary purpose of using a tourniquet during venipuncture?

To immobilize the patient’s arm
To cause temporary pain for better compliance
To engorge the veins for easier access
To reduce bleeding after the puncture

The correct answer is: To engorge the veins for easier access

The primary purpose of using a tourniquet during venipuncture is to engorge the veins for easier access. When a tourniquet is applied to the upper arm, it temporarily restricts venous blood flow, causing the veins below the application site to become more prominent and easier to locate. This engorgement helps phlebotomists identify the most suitable vein for drawing blood, enhancing the likelihood of successful venipuncture with minimal discomfort to the patient. This method is widely used in practice because it significantly improves the visibility and palpability of veins, especially in patients with difficult venous access. Employing a tourniquet correctly is essential for ensuring a successful procedure, as it minimizes the chances of complications such as multiple punctures or hematomas. While immobilization, pain induction, and bleeding reduction may be considerations related to venipuncture and patient management, they do not accurately capture the primary role of the tourniquet in the venipuncture process.