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What is In spinal anaesthesia the drug is deposited between? and explain in detail?
Ans. is 'b' i.e., Pia and arachnoid matter o In spinal anaesthesia LA is injected into subarachnoid space (space between pia matter and arachnoid matter). o Structure pierced during SA (from outside in) - Skin - Subcutaneous tissue --> Supraspinous & intraspinous ligament --> Ligamentum falvum --> Duramater - Arachnoidmater.