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Fig. 3 | BMC Cancer

Fig. 3

From: Comparison of the analgesic effect of ultrasound-guided paravertebral block and ultrasound-guided retrolaminar block in Uniportal video-assisted Thoracoscopic surgery: a prospective, randomized study

Fig. 3

Ultrasound images of PVB and RLB. A shows an ultrasound image of the paravertebral space before the injection of ropivacaine. B shows that the paravertebral space widened after the injection of 15 ml of ropivacaine. C shows an ultrasound image of the thoracic lamina before the injection of ropivacaine. D shows the hypoechoic area formed by the injection of ropivacaine above the lamina

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