Correct Answer: A

Rationale: Rationale: A relaxed face during conversation typically does not indicate a hearing loss, as the patient is likely able to hear and understand. B, speaking loudly, is a common sign of hearing loss. C, turning towards the speaker, suggests an effort to hear better. D, being withdrawn, could indicate difficulty in communication due to hearing loss. Therefore, A is the correct answer as it does not align with typical signs of hearing loss.

Correct Answer: A

Rationale: Rationale: A relaxed face during conversation typically does not indicate a hearing loss, as the patient is likely able to hear and understand. B, speaking loudly, is a common sign of hearing loss. C, turning towards the speaker, suggests an effort to hear better. D, being withdrawn, could indicate difficulty in communication due to hearing loss. Therefore, A is the correct answer as it does not align with typical signs of hearing loss.

Correct Answer: C

Rationale: The correct answer is C: Check his airway. Ensuring a patent airway is the priority in trauma care to maintain oxygenation and ventilation. With the patient unconscious and bleeding profusely, airway obstruction or compromise is a critical concern. By checking the airway first, the nurse can quickly assess and address any immediate threats to the patient's breathing. Stopping the bleeding (choice A) can be addressed once the airway is secured. Taking vital signs (choice B) and finding out what happened from eyewitnesses (choice D) can be important but are secondary to ensuring the patient's airway is clear and unobstructed.

Correct Answer: D

Rationale: The correct answer is D because Buck's extension traction is not used definitively to treat fractures in children due to their growing bones. Instead, it is used temporarily in adults to control muscle spasm and pain. - A: Correct - Buck's extension traction is indeed used temporarily in adults to control muscle spasm and pain. - B: Correct - Buck's extension traction is applied by an orthopedic surgeon under aseptic conditions using wires and pins. - C: Correct - The pulling force in Buck's extension traction is indeed transmitted to the musculoskeletal structures. Therefore, the incorrect option is D as Buck's extension traction is not used definitively to treat fractures in children.

Correct Answer: B

Rationale: The correct answer is B: Pericardial friction rub. This is a key diagnostic sign of pericarditis due to the inflammation of the pericardial layers causing a rough, grating sound heard upon auscultation. Precordial pain (A) is a common symptom but not a specific diagnostic sign. Hypotension (C) and rapid/labored respirations (D) are not typically associated with pericarditis. Therefore, the presence of a pericardial friction rub is crucial in confirming the diagnosis of pericarditis.