The pressure used in pneumatic tourniquet in upper limb is upto:
Pneumatic tourniquet is a narrow rubber bag to be wound around a limb, pressure being applied by pumping air into the inflatable cuff.
A bloodless field is obtained by applying pressure through pneumatic tourniquet for accurate surgery. Usually pressure applied 75 mmHg over systolic blood pressure for not more than 2 hours.
Systolic Blood Pressure + 50
Systolic Blood Pressure + 75
Systolic Blood Pressure + 100
None of the above