The Efficacy of Programmed Intermittent Epidural Bolus for Postoperative Analgesia after Open Gynecological Surgery: A Randomized Double-Blinded Study

Table 2

Postoperative medication used by the programmed intermittent epidural bolus (PIEB) and continuous epidural infusion (CEI) groups (perprotocol analysis).

Variable	PIEB group	CEI group	value
	()	()
Number of PCEA doses
3 hours	2	13	0.004
24 hours	13	33	0.045
48 hours	4	12	0.362
Total	17	60	0.007
Loxoprofen, mg, median [25th–75th quartiles]
3 hours	0	0	1.000
24 hours	0	60	0.431
48 hours	0	60	0.036
Total	60	120	0.047
Pentazocine, mg, median [25th–75th quartiles]
3 hours	0	0	1.000
24 hours	0	0	0.317
48 hours	0	0	1.000
Total	0	0	0.624

The data are presented as median (25th–75th quartiles) number of administered doses or dose; CEI: continuous epidural infusion; PCEA: patient-controlled epidural analgesia; PIEB: programmed intermittent epidural bolus.