Correct Answer: A

Rationale: When a client is receiving 100% oxygen via a partial rebreathing mask, there is a higher risk for oxygen toxicity due to the higher concentration of oxygen delivered. This client should be assessed most frequently for manifestations of oxygen toxicity. Choices B, C, and D are less likely to result in oxygen toxicity compared to 100% oxygen delivery via a partial rebreathing mask.

Correct Answer: B

Rationale: The correct answer is B: Mitral stenosis. A high-pitched scratching sound heard during both systole and diastole with the diaphragm of the stethoscope positioned at the left sternal border indicates mitral stenosis, not a pericardial friction rub. Pericardial friction rub is a to-and-fro, grating, or scratching sound due to inflamed pericardial surfaces rubbing together, typically heard in early diastole and late systole. Aortic regurgitation and tricuspid stenosis would present with different auscultatory findings compared to the described scenario, making them incorrect choices in this context.

Correct Answer: A

Rationale: To prevent complications associated with prolonged bed rest, encouraging the client to perform antiembolic exercises every 2 hours is essential. These exercises help promote circulation and prevent blood clots. Instructing the client to cough and deep breathe every 4 hours is beneficial for respiratory function, but it is not as critical as antiembolic exercises. Repositioning the client every 4 hours helps prevent pressure ulcers and maintain skin integrity. Restricting fluid intake is not recommended, as hydration is important for overall health and well-being, especially for clients on bed rest.

Correct Answer: C

Rationale: The Romberg test is a neurological test that assesses proprioception and balance. To perform this test, the client is asked to stand with their feet together and arms at their sides while closing their eyes. By removing visual input, the test challenges the vestibular and proprioceptive systems. Choices A, B, and D are incorrect because they do not align with the proper procedure for conducting the Romberg test. Extending arms in front, walking heel to toe, or placing hands on hips are not part of the Romberg test protocol and may introduce variables that could affect the assessment of balance.

Correct Answer: A

Rationale: The correct answer is A because understanding pain management involves considering non-pharmacological approaches, such as listening to music for relaxation and comfort. Choice B is incorrect as excessive sleep may not be an effective pain management strategy. Choice C is incorrect because pain medication may still be necessary even if pain levels are low. Choice D is not the best answer, as it simply states following the nurse's suggestions without demonstrating an understanding of personalized pain management techniques.