Following a venous occlusion by a tourniquet inflated to 70 mmHg , patients in Group A ( n = 38 ) received normal saline ( NS ) 3 ml , while those in Group B ( n = 37 ) and in Group C ( n = 37 ) respectively received fentanyl 150 micrograms or 3 ml and 2 % lidocaine 3 ml ( 60 mg ) .
