Pain Control after Total Knee Arthroplasty: Comparing Intra-Articular Local Anesthetic Injection with Femoral Nerve Block

Table 3

Postoperative pain intensity, cumulative opioid consumption, incidences of opioid-related side effects, time to ambulation, early ambulation, and hospital stay.

	IALA group ()	FNB group ()	value
Verbal pain intensity
POD1 (0/1/2/3/4)	0/34/4/1/0	0/51/3/1/0	0.622
POD2 (0/1/2/3/4)	0/37/1/0/0	0/48/0/0/0	0.442
Cumulative opioid
POD1 (mg), mean (SD)	38.21 (18.36)	35.55 (14.69)	0.437
POD2 (mg), mean (SD)	69.28 (33.43)	59.56 (29.40)	0.142
Cumulative opioid consumptionBW
POD1 (mg/kg), mean (SD)	0.54 (0.23)	0.56 (0.26)	0.801
POD2 (mg/kg), mean (SD)	0.98 (0.43)	0.99 (0.48)	0.919
Opioid related side
Dizziness (%)	5 (12.8)	6 (10.9)	1.000
Nausea (%)	2 (5.1)	3 (5.5)	1.000
Vomiting (%)	4 (10.3)	3 (5.5)	0.444
Time to walk (hrs), mean	33 (14)	35 (17)	0.68
Early ambulation (<12 hrs)	3	0	0.07
Postop hospital stay (day), mean (SD)	4.18 (0.91)	4.51 (1.41)	0.205

Categorical data were analyzed using Fisher’s exact test. Continuous data were analyzed using -test.
BW: body weight (kg).
POD1: postoperative day 1.
POD2: postoperative day 2.
pain intensity scale: 0 = no pain, 1 = mild pain, 2 = moderate pain, 3 = severe pain, and 4 = extreme pain.
to i.v. equivalent dose of morphine.
pruritus or respiratory depression was recorded in both groups.
time interval from the end of operation to postoperatively first time walking assisted with a walker.