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Proposed classification scheme for severity of frostbite injuries

Proposed classification scheme for severity of frostbite injuries
Frostbite injuries of the extremities Grade 1 Grade 2 Grade 3 Grade 4
Extent of initial lesion at day 0 after rapid rewarming Absence of initial lesion Initial lesion on distal phalanx Initial lesion on intermediary and proximal phalanx Initial lesion on carpal/ tarsal
Bone scanning at day 2 Useless Hypofixation of radiotracer uptake area Absence of radiotracer uptake area on the digit Absence of radiotracer uptake area on the carpal/tarsal
Blisters at day 2 Absence of blisters Clear blisters Hemorrhagic blisters on the digit Hemorrhagic blisters over carpal/tarsal
Prognosis at day 2 No amputation Tissue amputation Bone amputation of digit Bone amputation of the limb ± systemic involvement ± sepsis
No sequelae Fingernail sequelae Functional sequelae Functional sequelae
Reproduced from: Cauchy E, Chetaille E, Marchand V, Marsigny B. Retrospective study of 70 cases of severe frostbite lesions: a proposed new classification scheme. Wilderness Environ Med 2001; 12:248. Table used with the permission of Elsevier Inc. All rights reserved.
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