Which type of fracture occurs due to twisting or rotational forces on the bone?

The nurse should instruct the patient to avoid placing any objects under the cast to prevent skin irritation, damage to the cast, and potential introduction of bacteria or contaminants.

a. Encouraging the patient to frequently remove the cast for skin care is not recommended, as it can compromise the cast's fit and function and increase the risk of complications.
b. Advising the patient to use a hairdryer on the cast to relieve itching is not recommended, as it can cause skin maceration and damage the cast.
d. Educating the patient to keep the cast exposed to air for prolonged periods is not recommended, as dirt and debris can get trapped inside the cast, increasing the risk of infection. The patient should follow the healthcare provider's instructions for cast care.

X-ray is the most appropriate initial diagnostic study for suspected fractures. It provides clear images of bones and can help identify the presence, location, and extent of the fracture.

b. MRI: MRI is useful for soft tissue imaging, but it may not be the first choice for initial evaluation of fractures. X-rays are more commonly used for immediate assessment.
c. CT scan: CT scan can provide detailed images of bones and soft tissues, but it is not typically the first-line imaging study for fractures. X-rays are more commonly performed first.
d. Ultrasound: Ultrasound is primarily used for imaging soft tissues and may not provide sufficient detail for evaluating fractures. X-rays are more appropriate for initial assessment.