I know subdubal operation first open skull u found a crack start irrigating on it and drill with the drill stop when u make hole when u make hole take scalpel and make incision in the hole.U see blood than drain it hold it until the blood is drained than open the first cabinet theres some another drain place it there u will se that is some drain in the hole on the skin wheres the drain place suction and close the scalp u know how right.Just read instructions in the class.ok
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