Nokea
What are the articular surfaces in a total knee replacement?
- A. A metal tibial component that articulates with the plastic surface of the femoral component
- B. A metal femoral component that articulates with the plastic fibula component
- C. The patella is replaced with plastic or similar substance or has plastic affixed to the back to provide a smooth articular surface
- D. The patella, tibia, and femur are replaced with plastic or polyethylene components
Correct Answer: A,C
Rationale: In total knee replacement, the tibial component (metal) articulates with the femoral component (plastic), and the patella may have a plastic surface for smooth movement.
You may also like to solve these questions
You are working in a long-term care setting. One of the residents is able to ambulate but sits in a wheelchair each day. What action will you take?
- A. Check the orders for ambulation and be sure that they are followed to promote mobility.
- B. Change the activity order to wheelchair only because the resident prefers to sit rather than ambulate.
- C. Instruct the CNA to do passive range-of-motion exercises because the resident is not ambulating anymore.
- D. Call the doctor and report that the resident is no longer ambulating.
Correct Answer: A
Rationale: Promoting mobility by following ambulation orders prevents complications like muscle atrophy. Changing orders or assuming non-ambulation is premature without assessment.
A typical ambulation order by a health-care provider or physical therapist might be
- A. Walk patient in hall.
- B. Ambulate in hall several times.
- C. Ambulate 24 steps each day.
- D. Ambulate three times per day, 20 feet (6 meters) each time.
Correct Answer: D
Rationale: A typical ambulation order specifies frequency, distance, and time, as in option D. Options A and B are vague, and option C lacks frequency details.
A patient came to the ER complaining of pain in her elbow after a fall. The x-ray shows fractured ulna at the olecranon process. There is also a suspected fracture of the radius. Which diagnostic test would be most helpful in determining a complete diagnosis?
- A. CT scan
- B. MRI
- C. Bone scan
- D. Electromyelogram
Correct Answer: A
Rationale: A CT scan provides detailed imaging of bones, making it ideal for confirming suspected fractures like the radius fracture. MRI is better for soft tissue, bone scans for bone activity, and electromyelograms assess nerve function.
A common condition that requires a joint replacement is
- A. A hairline fracture.
- B. Osteoarthritis.
- C. A comminuted fracture.
- D. An amputation.
Correct Answer: B
Rationale: Osteoarthritis, a degenerative joint disease, commonly requires joint replacement due to cartilage loss and pain. Hairline and comminuted fractures are treated with immobilization or fixation, and amputation is a procedure, not a condition.
A patient has a fresh plaster cast applied to the left leg from the thigh to the ankle. How will you prevent complications as the cast dries?
- A. Elevate the leg and monitor for swelling or neurovascular issues.
- B. Apply heat to speed drying.
- C. Keep the cast covered to prevent contamination.
- D. Allow the patient to bear weight to test cast integrity.
Correct Answer: A
Rationale: Elevating the leg and monitoring for swelling or neurovascular issues prevents complications like compartment syndrome. Heat, covering the cast, or weight-bearing could worsen outcomes.