What should you know about pouring plaster of paris?

Plaster of Paris is a powder that is mixed with water to form a workable material. It is shaped around a body part or over a mould, then hardens into a rigid support. During setting, the material can produce heat, so the skin needs protection and the cast must not be wrapped too tightly. A cast may hold a broken limb still or guide gradual correction in a child receiving clubfoot casting. Fracture alignment and the patient’s circulation determine how the cast is shaped and checked.

Tell the clinician about burning, increasing pressure, numbness, or pain while the material is being applied. Keep the new cast supported and follow instructions about movement, weight-bearing, and keeping it dry. Do not cut, trim, heat, or insert objects into it yourself. Elevating the limb as advised can reduce swelling. Check exposed fingers or toes for normal colour, warmth, movement, and sensation. See Plaster of Paris, Fracture Casting, or Clubfoot Casting for related care information.

Get urgent advice for worsening pain or pressure, increasing swelling, numbness, tingling, inability to move fingers or toes, or exposed skin that becomes pale, blue, cold, or unusually warm. Seek prompt assessment if the cast cracks, becomes wet and soft, smells bad, rubs the skin, or no longer supports the limb. Severe pain after an injury also needs timely review.

What is this cast intended to correct or protect? How should I support the limb while it sets? When may I move or bear weight? Which changes in colour, sensation, or pain mean the cast needs adjustment?