Different Concentrations of Ropivacaine under Ultrasound Guidance on Quadratus Lumbar Muscle Nerve Block in Elderly Patients with Hip Replacement

Table 3

Effects of different concentrations of ropivacaine on patients’ heart rate and blood pressure before and after surgical intervention.

Index	Time	Control group	Observation group
Heart rate (times/min)	Before anesthesia			0.01	0.963
	3 min after anesthesia			3.66	0.001
	10 min after anesthesia			5.55	0.002
	30 min after anesthesia			3.1	0.014
	After surgery			5.06	0.003
Mean blood pressure (mmHg)	Before anesthesia			0.11	0.974
	3 min after anesthesia			1.29	0.846
	10 min after anesthesia			5.26	0.001
	30 min after anesthesia			3.76	<0.01
	After surgery			5.21	0.003