BRAIN
VENTRICLES CSF
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In between 2nd and 3rd lumbar vertebrae
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In between 3rd and 4th lumbar vertebrae
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In between 5th and 6th lumbar vertebrae
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In between 3rd and 5th lumbar vertebrae
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Detailed explanation-1: -The doctor inserts a thin, hollow needle into the lower part of the lumbar spine, usually between the 3rd and 4th or the 4th and 5th lumbar vertebrae. The spinous processes of these vertebrae in the lower spine can easily be felt through the skin.
Detailed explanation-2: -The spinal needle can be safely inserted into the subarachnoid space at the L3-4 or L4-5 interspace, since this is well below the termination of the spinal cord in most patients.
Detailed explanation-3: -Wearing nonsterile gloves, locate the L3-L4 interspace by palpating the right and left posterior superior iliac crests and moving the fingers medially toward the spine (see the image below). Palpate that interspace (L3-L4), the interspace above (L2-L3), and the interspace below (L4-L5) to find the widest space.
Detailed explanation-4: -The desired insertion point of the needle is the L3-L4 or L4-L5 interspace; thus, the needle is inserted below the level of the spinal cord. The spinous process of L4 lies along an imaginary line between the top of the posterior superior iliac crests.