Table 2: Clinical characteristics.

Patients	PR0	MAP0	PR1	MAP1	PR_E	MAP_E	DURATION OF ANALGESIA (hrs.)	DOSE OF tramadol consumed in 24 Hrs.(mg)
1.	78	68	76	70	80	76	10	75
2.	71	65	70	68	82	78	12	50
3.	70	78	75	79	88	88	11	50
4.	74	70	73	72	78	87	12	50
5.	63	65	65	68	70	80	14	50
6.	65	80	70	82	77	98	12	50
7.	68	76	60	78	65	90	11	75
8.	88	80	89	84	99	100	10	75
9.	90	78	80	80	88	99	12	50
10.	96	98	98	100	100	100	10	75
11.	68	80	64	88	98	98	13	50
12.	73	90	70	78	89	90	12	50

PR0: Baseline Pulse, MAP0: Baseline Mean Arterial Pressure, PR1: Pulse 1hour after Block, MAP: Mean Arterial Pressure 1hour after Block, PR_E: Pulse After Extubation, MAP_E: Mean Arterial Pressure after Extubation.