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The nurse placing a patient following knee replacement surgery into a continuous passive motion (CPM) machine has the responsibility to:

raise the head of the bed to 30 to 45 degrees.

elevate the machine at the foot of the bed on one pillow.

set the proper flexion and extension limits.

keep the operated knee warm.

Answer and Explanation

The Correct Answer is C

A. Raise the head of the bed to 30 to 45 degrees.

While head elevation for comfort is acceptable, it is not the primary responsibility for CPM care.

B. Elevate the machine at the foot of the bed on one pillow.

The CPM machine should lie flat along the bed frame. Elevation on a pillow can cause misalignment or malfunction.

C. Set the proper flexion and extension limits.

The nurse must confirm that the machine is set according to the provider's orders for proper range of motion and to prevent injury.

D. Keep the operated knee warm.

While comfort is important, this is not a priority of CPM machine care and doesn't directly relate to its function.

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Correct Answer is A

Explanation

A. Locks the hydraulic valve before attaching the sling to the lift

The hydraulic valve must be unlocked to adjust height and should only be locked after the client is securely attached and raised. Locking it before attaching the sling may indicate improper procedure or reduced safety during lifting.

B. Leaves the bed in the lowest position throughout the procedure

Leaving the bed low can be safe depending on facility protocol and prevents injury if the client or staff lose balance.

C. Raises the head of the bed to a sitting position just before the transfer

Elevating the head of the bed helps the client into a functional sitting position, making sling placement and transfer easier and safer.

D. Places a removable cover over the sling

A removable cover can enhance comfort and hygiene, especially if the sling is shared.

A. "Keep your head straight and turn it as far as possible to either side." B. "Move your head from the upright position back as far as you can." C. "Move your head so that your chin rests on your chest." D. "Move your head laterally towards your right and left shoulder."

Correct Answer is B

Explanation

A. "Keep your head straight and turn it as far as possible to either side."

This is rotation, not hyperextension.

B. "Move your head from the upright position back as far as you can."

This describes hyperextension, which is the movement of the head beyond the neutral upright position.

C. "Move your head so that your chin rests on your chest."

This is flexion, not hyperextension.

D. "Move your head laterally towards your right and left shoulder."

This describes lateral flexion, not hyperextension.

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The nurse placing a patient following knee replacement surgery into a continuous passive motion (CPM) machine has the responsibility to:

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