Chronic Pain characteristics Bupivacaine group (n=30) Ketamine group (n=30)
Type of Pain    
t Throbbing 1 (3.3 %) 1(3.3%)
Aching 3 (10%) 2(6.6%)
Troublesome 2(6.6%) 1(3.3%)
Burning 9 (30%)* 3 (10%)
Stabbing or Pricking 11 (36%)* 4 (13%)
Wound allodynia 8 (26%)* 2 (6.6%)
Wound Hyperalgesia 5(16%)* 1(3.3%)
Chi-squared test was used
*Statically significant change (p<0.05)
Table 3: Chronic pain characteristics in each group of patients 6 months postoperatively.