During lumbar puncture in a term infant, which technique best describes advancing the needle?

Enhance your readiness for the MEDNAX Neonatal Nurse Practitioner Exam. Utilize flashcards, multiple-choice questions, and detailed explanations. Equip yourself for success!

Multiple Choice

During lumbar puncture in a term infant, which technique best describes advancing the needle?

Explanation:
In a term infant, the distance from the skin to the subarachnoid space is quite short, so the needle should be advanced gently to a modest depth to reach CSF without risking deeper injury. Advancing slowly to about 1 to 1.5 cm lets you reach the subarachnoid space safely; pushing to 2–3 cm or 4 cm increases the chance of penetrating deeper structures or causing trauma, and stopping at 0.5 cm is often not enough to access CSF. If CSF isn’t obtained at that shallow depth, you can reassess and adjust rather than forcing the needle deeper.

In a term infant, the distance from the skin to the subarachnoid space is quite short, so the needle should be advanced gently to a modest depth to reach CSF without risking deeper injury. Advancing slowly to about 1 to 1.5 cm lets you reach the subarachnoid space safely; pushing to 2–3 cm or 4 cm increases the chance of penetrating deeper structures or causing trauma, and stopping at 0.5 cm is often not enough to access CSF. If CSF isn’t obtained at that shallow depth, you can reassess and adjust rather than forcing the needle deeper.

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