The number of dermatomes blocked (sacral segments = 5, lumbar segments = 5, thoracic segments = 12) versus reduction in the shivering threshold (difference between the control shivering threshold and spinal shivering threshold). The shivering threshold was reduced more by extensive spinal blocks than by less extensive ones (delta threshold = 0.74 to 0.06 [dermatomes blocked]; r2 = 0.58, p <0.006). The dashed lines indicate the 95% CI for the slope.
From: Leslie K, Sessler DI. Reduction in the shivering threshold is proportional to spinal block height. Anesthesiology 1996; 84:1327. DOI:
0000542-199606000-00008. Copyright © 1996 American Society of Anesthesiologists. Reproduced with permission from Wolters Kluwer Health. Unauthorized reproduction of this material is prohibited.
