This study evaluates the addition of intermittent pneumatic compression maneuver to axillary brachial plexus block in forearm and hand surgery. Half of participants will receive axillary brachial plexus block and intermittent pneumatic compression maneuver, while the other half will receive only axillary brachial plexus block.

Inclusion Criteria:

1. adults between ages of 20 and 50
2. patients who are scheduled forearm and hand surgery with axillary brachial plexus block
3. American Society of Anesthesiologists Physical Status classification 1 or 2
4. patients who voluntarily agree to participate in the trial

Exclusion Criteria:

1. patients who are pregnant or lactating
2. patient who does not agree to participate in the study
3. patient with side effects on local anesthetics
4. patient with neurologic deficit of upper arm
5. patients with comorbidities of cardiac, pulmonary, renal, cerebral, and hepatic systems
6. patients with peripheral vascular disease