CPO Clinical Application & Fitting 5

Question 1

A patient with a transtibial amputation using a vacuum-assisted socket suspension (VASS) reports that the vacuum alarm triggers frequently during activity. The clinician should first check:

Accepted Answer

Socket fit and liner integrity for air leaks

Answer

The microprocessor knee settings

Answer

The patient's gait pattern for excessive hip hiking

Answer

Battery life of the vacuum pump

Question 2

When fabricating a custom AFO for a patient with mild spastic equinovarus, the trim lines should be:

Accepted Answer

Posterior to the malleoli to provide maximum rigidity

Answer

Anterior to the malleoli to allow unrestricted motion

Answer

At the malleoli to balance flexibility and control

Answer

Trimmed above the metatarsal heads for toe clearance only

Question 3

During assessment for a new transfemoral prosthesis, the clinician measures the patient's residual limb and notes a circumference decrease of 2 cm proximally since the last visit. This most likely indicates:

Accepted Answer

Significant volume loss requiring socket modification or replacement

Answer

Normal maturation of the residual limb

Answer

Improved prosthetic fit

Answer

Edema resolution that improves load distribution

Question 4

Which combination of features characterizes an ischial containment socket (ICS) for a transfemoral amputation?

Accepted Answer

Narrow ML dimension with the ischium contained inside the socket walls

Answer

Wide lateral wall with the ischium resting on the socket brim

Answer

Open-top design with proximal suspension strap

Answer

Low anterior wall with minimal proximal trim lines

Question 5

A pediatric patient with myelomeningocele at the L4 level presents for orthotic fitting. The expected motor function preserved includes:

Accepted Answer

Hip flexion, knee extension, and partial foot dorsiflexion

Answer

Hip extension and knee flexion only

Answer

Full ankle and foot musculature

Answer

Hip flexion only with complete flaccidity below

Question 6

A prosthetist notes that a patient's new exoskeletal (crustacean) prosthesis is cosmetically unacceptable due to visible misalignment of the pylon. In an endoskeletal (modular) system, this is addressed by:

Accepted Answer

Adjusting the alignment at the modular pyramid connector and replacing the soft cover

Answer

Recasting the entire outer shell

Answer

Building up the external lamination in the misaligned area

Answer

Increasing the pylon length to compensate

Question 7

Which clinical finding during a static prosthetic alignment check for a transtibial amputee indicates that the foot is set in excessive toe-out?

Accepted Answer

The prosthetic limb abducts away from the midline when viewed from the front

Answer

The patient stands with the sound foot rotated inward

Answer

The knee flexes excessively during weight acceptance

Answer

The patient leans backward on the prosthetic side