CPT (Certified Phlebotomy Technician) Practice Exam

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What fluid is extracted during a lumbar puncture?

Blood
Urine
CSF
Saliva

The correct answer is: CSF

During a lumbar puncture, also known as a spinal tap, cerebrospinal fluid (CSF) is extracted from the subarachnoid space in the spinal canal. CSF is a clear, colorless fluid that surrounds the brain and spinal cord, providing important protection and nutrients to these vital structures. This fluid can be analyzed for various medical purposes, such as diagnosing infections, bleeding, or neurological conditions. Blood, urine, and saliva are not typically extracted during a lumbar puncture procedure, making them incorrect choices in this context.