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. 2008 Aug;40(4):180–182. doi: 10.4103/0253-7613.43166

Table 2.

Comparison of duration of analgesia between Group A and Group B patients

Group A n= 25 0.5 % hyperbaric bupivacaine with 0.2 ml normal saline Mean ± S.D. Group B n= 25 0.5 % hyperbaric bupivacaine and 0.2 ml (20mg) tramadol Mean ± S.D.
Duration of pain free period (in min) 210 ± 10.12 380 ± 11.82*
*

P < 0.05