From: The effect of continuous adductor canal block combined with distal interspace between the popliteal artery and capsule of the posterior knee block for total knee arthroplasty: a randomized, double-blind, controlled trial
ACB+ SHAM (n = 35)
ACB+ IPACK (n = 35)
P value
4 h
15 (42.8%)
6 (17.1%)
0.019
8 h
16 (45.7%)
4 (11.4%)
0.001
24 h
12 (34.3%)
0.046
48 h
8 (22.9%)
3 (8.6%)
0.188
72 h
0 (0%)
–