A snap just before entering epidural space, during epidural anaesthesia, is due to piercing of which ligament?

Question

Solved400 viewsMay 25, 2016Anaesthesia2015 aiims anaesthesia

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[A]. Supraspinatous ligament

[B]. Posterior longitudinal ligament

[C]. Ligamentum flavum

[D]. Interspinous ligament

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score 0 · Answer 1 · 2016-05-25T12:46:37+00:00

[C]. Ligamentum flavum
Explanation :-

In Lumber puncture, the tissues pierced are (in order): skin, subcutaneous tissue, supraspinal ligament, interspinal ligament, ligamentum flavum, dura mater, the arachnoid mater and into the subarachnoid space.
A spinal needle is inserted between the lumbar vertebrae L3/L4, L4/L5 or L5/S1.
It is pushed in until there is a “give” that indicates the needle is past the ligamentum flavum.
The needle is again pushed until there is a second “give” that indicates the needle is now past the dura mater.