Preoperative oral diazepam for intraoperative blood pressure stabilisation in hypertensive patients undergoing vitrectomy under retrobulbar nerve block anaesthesia: study protocol for a randomised controlled trial

Table 2 Blood pressure monitoring schedule

Group	On admission	1 h before operation (while taking oral diazepam/placebo)	Before anaesthesia	After anaesthesia	Every 5 min from the start of the operation				1 h after the operation
Group	On admission	1 h before operation (while taking oral diazepam/placebo)	Before anaesthesia	After anaesthesia	0 min	5 min	10 min		1 h after the operation
Diazepam	+	+	+	+	+	+	+	+	+
Placebo	+	+	+	+	+	+	+	+	+

ISSN: 1745-6215