OCC OCC Cast Removal & Bivalving

Question 1

Which instrument is the standard tool for cast removal?

Accepted Answer

Oscillating cast saw

Answer

The oscillating cast saw vibrates rather than rotates, cutting hard cast material while minimizing risk of skin laceration.

Question 2

How does an oscillating cast saw avoid cutting the patient's skin?

Accepted Answer

It vibrates rapidly but does not rotate, cutting rigid material but bouncing off soft tissue

Answer

The oscillating motion cuts through hard fiberglass or plaster but does not slice soft, pliable skin when proper technique is used.

Question 3

When removing a cast, the saw should be moved in which pattern?

Accepted Answer

In and out (plunging motion) along the cast surface, not dragged

Answer

A plunging in-and-out motion prevents overheating and reduces the risk of skin burns and lacerations.

Question 4

What is the purpose of bivalving a cast?

Accepted Answer

To split the cast into two halves to relieve pressure or allow for swelling

Answer

Bivalving cuts both sides of the cast and releases the underlying padding, reducing circumferential pressure while maintaining some immobilization.

Question 5

After bivalving, what is the NEXT step to fully relieve circumferential pressure?

Accepted Answer

Cut and spread the underlying cast padding

Answer

The inner padding layer also contributes to circumferential pressure and must be cut along the same bivalve lines to fully decompress.

(OCC) Orthopedic Casting Certification Practice Test