How to Apply a Plaster Cast to the Ankle

Casts can be used to set fractured ankles.

Casts are applied to ankles for a variety of reasons, including to heal ankle fractures and to protect an ankle following surgery. The medical community today normally uses fiberglass casts. Many fiberglass casts can support a patient's weight. You can apply a plaster or fiberglass cast in an emergency situation.

Things You'll Need

• Rubber gloves
• Water
• Cotton padding
• Fiberglass rolls
• Plaster rolls

Instructions

Fiberglass Casts

1. Put on a pair of rubber gloves. If you are using latex, make sure the patient does not have a latex allergy.

2. Position the foot and ankle to form a 90-degree angle.

3. Apply cotton padding to help protect the lower leg, ankle and foot from irritation. Apply the padding in a circular motion starting just below the knee and continue until the padding covers the foot. Leave the toes exposed unless otherwise indicated by the physician. Apply extra padding around the foot and near the top of the cast to prevent cuts and blisters.

4. Ask the patient what color cast they prefer since fiberglass comes in a variety of colors. Take the chosen color of fiberglass and submerge it into water. Apply the fiberglass to the leg quickly. It should be applied in the same circular motion as the cotton padding.

5. Allow the cast to dry for a few minutes.

Plaster Casts

1. Put on a pair of latex gloves for hygienic purposes. Make sure the patient does not have a latex allergy.

2. Position the foot and ankle to form a 90-degree angle.

3. Apply a soft cotton layer. Wrap the cotton padding in a circular motion. Start just below the knee and stop just before the toes. Apply a second layer for added comfort.

4. Open a roll of plaster. Immerse the unrolled plaster into warm water. Wrap the plaster roll in a circular motion over the layer of cotton padding. Smooth out any bumps or air bubbles.

5. Apply a second layer of plaster. Smooth it out and allow it to dry.

Tips & Warnings

• Plaster submerged in warm water will dry more quickly than using cold water.

• Casts are not designed to get wet. If available, you can provide the option of a waterproof layer. This will enable showering and minimal contact with water.

References

• KidsHealth.org; Frequently Asked Questions About Casts
• BoneandSpine.com; How to Apply a Cast