Lumbar puncture is performed at the vertebral level of which of the following?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Discover high-yield NBME Gross Anatomy concepts with quizzes designed to enhance your understanding. Equip yourself with flashcards, multiple-choice questions, and detailed explanations. Prepare effectively for your anatomy exam!

Multiple Choice

Lumbar puncture is performed at the vertebral level of which of the following?

Explanation:
The key idea is that lumbar puncture is done to access the CSF in the lumbar cistern, and you want to do this below where the spinal cord ends. In adults, the spinal cord ends around the level of the first few lumbar vertebrae, so entering the canal at lower levels avoids damaging the cord. The iliac crests align with the L4 vertebral level (the so-called Tuffier’s line), so locating that landmark points to a safe puncture site in the L3–L4 or L4–L5 interspace. Clinically, this is why the puncture is performed at the level of L4—providing access to CSF in the subarachnoid space without risking the spinal cord.

The key idea is that lumbar puncture is done to access the CSF in the lumbar cistern, and you want to do this below where the spinal cord ends. In adults, the spinal cord ends around the level of the first few lumbar vertebrae, so entering the canal at lower levels avoids damaging the cord. The iliac crests align with the L4 vertebral level (the so-called Tuffier’s line), so locating that landmark points to a safe puncture site in the L3–L4 or L4–L5 interspace. Clinically, this is why the puncture is performed at the level of L4—providing access to CSF in the subarachnoid space without risking the spinal cord.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy