Cold Injuries in Children | Types, Features and Treatment

Table of contents

  • Introduction
  • Types of cold Injuries
  • Pathophysiology •  Mechanism
  • Clinical features based on the type of cold Exposure
  • Treatment General Principles •  Specific
  • Outcomes
  • Pearls

DNB Question asked

Cold Injury (June/2007) Marks - 10

Cold injury may produce either local tissue damage, with the injury pattern depending on exposure to the type of cold

Type of coldInjury
Damp coldFrostnip, immersion foot, or trench foot
Dry coldleads to local frostbite
Generalized systemic effectshypothermia
OthersChill blains, Panniculitis
Table Showing possible types of cold Injuries in Children

Pathophysiology:

1. Ice crystals may form between or within a variety of cells.

Interference with Na Pump

Rapture of cell membranes Cell death


2. Secondary Neurovascular responses and Vasoconstriction

Shunting of blood

Tissue Ischaemia


3. Clumping of red blood cells or platelets

Micro-embolism and or thrombosis.

Clinical manifestations

Frostnip

Firm, cold, white areas on the face, ears, or extremities. Blistering and peeling may occur.

Immersion Foot (Trench Foot):

Immersion foot occurs in cold weather when the feet remain in damp or wet, poorly ventilated boots.

The feet become cold, numb, pale, edematous, and clammy. Tissue maceration and infection are likely.

Frostbite

Fig.1 - Showing Red swollen fingers with blisters due to Frost Bite

Initial stinging or aching of the skin progresses to cold, hard, white aesthetic, and numb areas. On rewarming, the area becomes blotchy, itchy, and often red, swollen, and painful.

Chilblain (Pernio)

Chilblain (pernio) is a form of cold injury in which erythematous, vesicular, or ulcerative lesions occur. They are often itchy, may be painful, and result in swelling and scabbing.

The lesions are most often found on the ears, the tips of the fingers and toes, and exposed areas of the legs.

Cold-Induced Fat Necrosis (Panniculitis)

It is a common and usually benign cold injury. Cold-induced fat necrosis occurs upon exposure to cold air, snow, or ice and manifests in exposed or, less often, covered surfaces.

Looks red or, less often, purple to blue macular, papular, or nodular lesions.

Treatment of various cold injuries in Children

General Principles


  1. Airway Breathing and circulation takes priority.
  2. Move to a safer and warmer area.
  3. Identify type and severity of Injury, and act accordingly.
  4. Avoid activities on the injured part like walking in case legs are affected.
  5. Sometimes removal of dead tissues may be necessary to prevent infection.

Treatment of Frostnip


Treatment consists of warming the area with an unaffected hand or a warm object.

Treatment of Trench Foot


is largely prophylactic and consists of using well-fitting, insulated, waterproof, nonconstricting footwear.

Treatment of frostbite


  1. Warming the affected area.
  2. Anti-inflammatory agents and analgesia are necessary.
  3. Freeze and rethaw cycles are most likely to cause permanent tissue injury.
  4. The affected area should be immersed in warm water (approximately 420C), with care taken not to burn the anesthetized skin.
  5. Vasodilating agents, such as prazosin and phenoxybenzamine, may be helpful.
  6. Surgical sympathectomy has also been tried with equivocal results.

Treatment of Chilblain


Treatment consists of prophylaxis - Avoiding prolonged chilling and protecting potentially susceptible areas with a cap, gloves, and stockings. Prazosin and phenoxybenzamine have been tried.

For significant itching, local corticosteroid preparations may be helpful.

Treatment of Panniculitis


Treatment is with nonsteroidal anti-inflammatory agents. The lesions may last 10 days to 3 wk.

Prognosis

The outcomes of cold injury depend on the 

  1. The severity of exposure and 
  2. Duration of exposure to the cold.

DPPearls - Points to remember

  1. Often the pain is ignored, especially the rewarming can be quite painful. Use adequate analgesia including opiates where necessary.
  2. Tetanus Prophylaxis where necessary.
  3. Assessment of dehydration and use of a proper rehydration regime.
  4. Make sure the parents and children ( if older) receive advice on the prevention of future incidents.

  1. Headache in Children
  2. Breath Holding spells
  3. Congenital Adrenal Hyperplasia

Sources - Image [1] - Winky from Oxford, UK, CC BY 2.0, via Wikimedia Commons

No comments: