Which cast is a cylinder cast used for patellar affection?

Which cast is a cylinder cast used for patellar affection?

• A. Thumb Spica Cast
• B. Cylinder Cast
• C. Short Leg Circular Cast
• D. Quadrilateral/Ischial Weight Bearing Cast

Answer: (B)

Immobilization strategy matters: for patellar problems you want a cast that firmly controls movement around the knee to protect and align the patellofemoral joint during healing. A cylinder cast achieves this by wrapping circumferentially around the leg, creating a rigid shell that holds the knee in one position (usually extended). This uniform circumferential support stabilizes the patella and prevents bending or shifting that could worsen either a fracture or a dislocation, making it the most appropriate choice for patellar affection. Thumb spica cast is designed to immobilize the thumb and wrist, not the knee. A short leg circular cast covers the lower leg and foot but typically ends below the knee, offering less control over knee alignment. A quadrilateral/ischial weight-bearing cast is used for hip or pelvic considerations and does not address patellar stabilization.

Immobilization strategy matters: for patellar problems you want a cast that firmly controls movement around the knee to protect and align the patellofemoral joint during healing. A cylinder cast achieves this by wrapping circumferentially around the leg, creating a rigid shell that holds the knee in one position (usually extended). This uniform circumferential support stabilizes the patella and prevents bending or shifting that could worsen either a fracture or a dislocation, making it the most appropriate choice for patellar affection.

Thumb spica cast is designed to immobilize the thumb and wrist, not the knee. A short leg circular cast covers the lower leg and foot but typically ends below the knee, offering less control over knee alignment. A quadrilateral/ischial weight-bearing cast is used for hip or pelvic considerations and does not address patellar stabilization.