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

Table 2

Effects of different concentrations of ropivacaine on patients’ sensory and motor block before and after surgical intervention.

Groups	Sensory block onset time (s)	Sensory block recovery time (min)	Onset time of motor block (s)	Motor block recovery time (min)
Control group
Observation group
	10.67	14.54	5.43	5.10
	0.001	0.002	0.001	0.003