OTC Orthopaedic Technologist 3

Question 1

During cast application, stockinette should extend beyond the cast edges by approximately how much to allow for folding back over padding?

Accepted Answer

2 inches

Answer

Stockinette should extend 2 inches beyond each end of the planned cast so it can be folded back over the padding to create a smooth, finished edge.

Question 2

A Colles' fracture typically results from which mechanism of injury?

Accepted Answer

Fall on an outstretched hand (FOOSH)

Answer

A Colles' fracture (distal radius fracture with dorsal displacement) classically results from a fall on an outstretched hand (FOOSH) with the wrist extended.

Question 3

Which of the following is the correct order of cast padding layers from innermost to outermost?

Accepted Answer

Stockinette, cast padding, casting material

Answer

The correct layering is stockinette directly on the skin, followed by cast padding (Webril), and then the casting material on the outside.

Question 4

Which nerve injury produces a 'wrist drop' deformity?

Accepted Answer

Radial nerve

Answer

Radial nerve injury causes weakness of wrist and finger extensors, resulting in the characteristic 'wrist drop' deformity due to loss of extensor function.

Question 5

When should a cast window be cut?

Accepted Answer

To allow wound inspection or pressure relief over a bony prominence

Answer

A cast window is cut to inspect underlying wounds, relieve pressure over a bony prominence, or access an area requiring wound care without removing the entire cast.

Orthopaedic Technologist Certified Test Practice Test

Orthopaedic Technologist Certified Test Practice Test

OTC Orthopaedic Technologist 3