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

Table 5

Comparison of the degree of nerve block in patients with different concentrations of ropivacaine after surgery ( (%)).

Group		0 class	I class	II class	III class
Control group	30	0 (0)	9 (30.00)	12 (40.00)	9 (30.00)
Observation group	30	2 (6.67)	17 (56.67)	10 (33.33)	1 (3.33)
		11.04
		0.001