Serial Casting for Ankle

Serial casting for the ankle is a process of using a cast to stretch the calf muscles over a period of time. We typically apply new casts every 3 to 4 days. After casting, your child will wear day braces, night braces or both and follow up with physical therapy.

How active can my child be in the cast?

Your child:

  • Can walk on the cast by the end of the appointment today. They should walk short distances today.
  • Should not be very active the first day. This will reduce muscle soreness.
  • Can be very active after the first day. Running is OK.
  • Must wear the cast shoe at all times when standing, walking and running, including when inside your home. This will prevent slipping and falling.
  • May have trouble sleeping the 1st night.

How do I take care of the cast?

  • Keep the cast dry at all times. If it is wet outside, you can cover the cast with a plastic bag. Talk to your child’s school about "inside recess" if it is wet outside.
  • If your child’s leg is itchy or hot, try using a hair dryer on the cool setting.
  • It is okay to decorate the cast with permanent markers or pens.

What should my child avoid?

  • Your child cannot swim or take a bath with the cast. Give your child sponge baths while they are in the cast.
  • Have your child avoid walking in puddles, wet grass or snow.
  • Do not stick any items down inside the cast.
  • Avoid letting your child play in sand or wood chips. Put a sock or plastic bag over the cast if this is a concern.

What should I do if I have a concern?

For any of the following, call Seattle Children's Hospital Therapy department from 7:30 a.m. to 4:00 p.m. at 206-987-2113, option 2.
Otherwise, go to your local urgent care or emergency room.

  • If the cast gets wet, it needs to be removed within 24 hours.
  • Your child starts limping or will not walk on the cast.
  • Your child feels numbness or tingling.
  • Your child has swollen, very cold or discolored toes.
  • Your child has pain that is confined to 1 area, is constant - especially during the day, or keeps them up at night.