Difference between revisions of "Cold injuries"

(Trench Foot)
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*Nonfreezing cold injuries occur due to exposure to wet conditions when temper >freezing  
*Nonfreezing cold injuries occur due to exposure to wet conditions when temper >freezing  
==Trench Foot==
==[[Trench Foot]]==
*Develops slowly over hours-days when foot is exposed to cold/wet conditions
*Reversible injury may progress to irreversible injury
===Clinical Features===
*Tingling/numbness is initial symptom
*Foot appears pale, mottled, anesthetic, pulseless, and immobile
**Initially does not change after rewarming
*Hyperemic phase begins w/in hr after rewarming
**Assoc w/ severe burning pain and reappearance of proximal sensation
*As perfusion returns to foot over 2-3d edema and possibly bullae may form
*Anesthesia persists for weeks and may be permanent; gangrene may occur
*Keep feet clean, warm, dryly bandaged, elevated
*Monitor for signs of infection
==Pernio (Chilblains)==
==Pernio (Chilblains)==

Revision as of 06:20, 3 December 2013


  • Frostbite occurs only when ambient temperatures are well below freezing
  • Nonfreezing cold injuries occur due to exposure to wet conditions when temper >freezing

Trench Foot

Pernio (Chilblains)


  • Mild but uncomfortable inflammatory lesions of skin
    • Caused by long-term intermittent exposure to damp, nonfreezing ambient temperatures
  • Primarily a disease of women and children

Clinical Features

  • Hands, ears, lower legs, feet most commonly affected
  • Symptoms
    • Tingling, numbness, pruritus, burning paresthesias
    • Cutaneous manifestations appear up to 12hr after acute exposure:
    • Localized edema, erythema, cyanosis, plaques, nodules
      • May progress in rare cases to ulcerations, vesicles, and bullae
    • Rewarming may result in formation of tender blue nodules which may persist for days


  • Affected skin should be rewarmed, gently bandaged, and elevated
  • Nifedipine 20mg PO TID may be helpful as both prophylactic and therapeutic tx
  • Topical corticosteroids and oral steroid burst have been shown to be useful

Cold Panniculitis

  • Prolonged exposure to temp >freezing leads to mild necrosis of subcutaneous fat tissue
  • Seen in children (popsicles) and women involved in equestrian activities
  • Resolution may result in adipose fibrosis w/ cosmetic defects
    • There is no treatment

Cold Urticaria

  • Hypersensitivity to cold air or water which may lead to fatal anaphylaxis
  • Treat similarly to urticarial lesions from other causes (i.e. antihistamines)
  • Avoidance of cold is recommended