Fig. 2From: Intrathecal chloroprocaine or hyperbaric prilocaine for ambulatory knee surgery? A prospective randomized studya Percentage of patients with a complete loss of cold sensation at the T12 dermatome during the first 30 min after local anesthetics injection. b Time to obtain a T12 dermatome level extension of sensory block evaluated with cold test. c Duration of sensory block at T12 dermatome level evaluated with cold test. d Percentage of patients with negative pin-prick test at T12 dermatome level during the first 30 min after local anesthetics injection. e Time to obtain a T12 dermatome level extension of sensory block evaluated with pin-prick test. f Duration of sensory block at T12 dermatome level evaluated with pin-prick test. Statistically significant differences are marked with *(P < 0.05)Back to article page