Is lower tourniquet pressure during total knee arthroplasty effective? A prospective randomized controlled trial

Table 2 Comparison of the efficacy of the tourniquet in both groups

	Conventional [SBP + 150] (n = 80)	Lower Pressure [SBP + 120] (n = 80)	P value
Bloodless surgical field (initial)	80/80 (100%)	79/80 (99%)	1.000
Intra-operative blood oozing after sharp rise in SBP	1/80 (1%)	2^*/80 (3%)	1.000
Total failure of providing bloodless surgical field	1/80 (1%)	2^*/80 (3%)	1.000
Hemoglobin drop on 2nd day	2.7 (1.1)	2.4 (1.3)	0.184
Hemoglobin drop on 5th day	2.8 (1.3)	2.4 (1.8)	0.076
Drained volume (ml)	23 (35)	27 (47)	0.482
Calculated blood loss (ml)	744 (256)	708 (283)	0.404

Data are presented as a number of patients with the percentage or mean values with the standard deviation in the parenthesis
^*One patient in the lower tourniquet pressure group failed to achieve a bloodless surgical field initially and showed intraoperative blood oozing after a sharp rise in SBP
SBP systolic blood pressure

ISSN: 1471-2474