Comparison of the Effects of Intrathecal Fentanyl and Intrathecal Morphine on Pain in Elective Total Knee Replacement Surgery

Table 9

Additional analgesic needs of the groups ( (%)).

	Group M	Group F	Value of
1st hr.	0 (0%)	0 (0%)
2nd hr.	0	7
6th hr.	14	24
12th hr.	19 (76%)	22 (88%)
24th hr.	6	23

. Group M, as compared to Group F.