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Because the spinal cord proper ends at about L1/2, with the cauda equina continuing from then.

So, when you take an LP from L3, there is no risk of you damaging the spinal cord.

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15y ago

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Where along the vertebral column is a needle inserted for a lumbar puncture?

A lumbar puncture is typically performed in the lower back, between the third and fourth or fourth and fifth lumbar vertebrae. This location allows for the needle to be inserted into the subarachnoid space to collect cerebrospinal fluid for diagnostic purposes.


Why is a tourniquet placed 3-4 inches above the intended puncture site?

By puncture site I'm guessing you mean a puncture in the epadurmas (skin). It is Placed to limit the blood flow reducing the amount of blood loss. Hope I helped


What are the risks of lumbar punch?

Post-lumbar puncture headache. About 1 out of 3 people who have undergone a lumbar puncture develop a headache afterward due to a leak of fluid into nearby tissues. The headache typically starts several hours up to two days after the procedure and may be accompanied by nausea, vomiting and dizziness. Post-lumbar puncture headaches can last from a few hours to a week or more.Back discomfort or pain. You may feel pain or tenderness in your lower back after the procedure. The pain might radiate down the back of your legs.Bleeding. Serious bleeding can occur if you have a blood-clotting disorder or take blood-thinning or other anticoagulant medications.Brainstem herniation. Increased intracranial pressure, due to a brain tumor or other space-occupying lesion, can lead to compression of the brainstem after a sample of cerebrospinal fluid is removed. A computerized tomography (CT) scan or MRI prior to a lumbar puncture can be obtained, if needed, to determine if there is evidence of increased intracranial pressure.This complication is uncommon.MayoClinic.com


What is the medical abbreviation for third lumbar vertebra?

The medical abbreviation for the third lumbar vertebra is L3. In this notation, "L" stands for lumbar, and the number "3" indicates that it is the third vertebra in the lumbar region of the spine.


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