Fig. 4From: Infrared thermography for assessment of thoracic paravertebral block: a prospective observational studyReceiver operator characteristic (ROC) curve of Td increase at 15 min after thoracic paravertebral block. Td increase was calculated as Td at each time point after paravertebral block minus Td at baseline. Td: difference of skin temperature between the blocked and the unblocked side at a certain dermatome. AUC, area under the curveBack to article page