Correct Answer: C

Rationale: Checking the humidifier's water regularly is the priority precautionary measure that should be done by the nurse during oxygen therapy. Maintaining adequate water in the humidifier ensures proper humidification of the oxygen delivered to the patient, helping prevent mucous membrane dryness and irritation. Dry mucous membranes can lead to discomfort, increased risk of infection, and potential damage to the respiratory system. Therefore, ensuring the humidifier's water level is appropriate is crucial for the safety and well-being of the patient receiving oxygen therapy. Limiting visitors, attaching "No Smoking" signage, and connecting the bait to the oxygen tank are important precautions as well, but checking the humidifier's water is the priority measure in this scenario.

Correct Answer: C

Rationale: In a critically ill patient admitted to the ICU with acute renal failure requiring renal replacement therapy (RRT), the healthcare team should prioritize the initiation of continuous renal replacement therapy (CRRT). CRRT is preferred in critically ill patients with hemodynamic instability as it allows for slow and continuous removal of solutes and fluids, making it a safer option compared to intermittent hemodialysis. CRRT can also provide better control of volume status and electrolyte imbalances over a longer period, which is beneficial in critically ill patients who are hemodynamically unstable. Peritoneal dialysis is not commonly used in the ICU setting for acute renal failure requiring RRT, and loop diuretics are not effective in treating acute renal failure. Temporary hemodialysis catheters may also be used, but CRRT is generally preferred in critically ill patients for better hemodynamic tolerance and control of solute and fluid removal.

Correct Answer: C

Rationale: By endorsing a detergent product on a TV commercial wearing a mini skirt and a plunging neckline shirt, Ms. Sanchez is violating the code of ethics for nurses. The code of ethics for nurses includes provisions that promote professionalism, respect, and integrity in the nursing profession. As a new nursing graduate, Ms. Sanchez has a responsibility to uphold the dignity and reputation of the nursing profession, and endorsing a product in a manner that may compromise her professional image goes against these principles. Nurses are expected to maintain a professional appearance and behavior that reflects positively on the profession and does not undermine public trust in their abilities as healthcare providers. Therefore, Ms. Sanchez's actions in this scenario are in violation of the code of ethics for nurses.

Correct Answer: C

Rationale: Clients undergoing nasogastric suctioning are at highest risk for developing metabolic imbalances, specifically metabolic acidosis. Nasogastric suctioning can lead to the loss of gastric acid, which in turn can cause metabolic acidosis due to a decrease in bicarbonate levels in the body. This disruption in the acid-base balance can result in symptoms such as confusion, headache, and overall malaise. It is crucial for the nurse to monitor the client's acid-base status closely and provide appropriate interventions to prevent or correct metabolic acidosis.

Correct Answer: C

Rationale: Autonomy is the ethical principle that upholds an individual's right to make decisions about their own medical treatment, free from coercion or undue influence. In this scenario, the 70-year-old patient has voluntarily decided not to have the pacemaker inserted despite the physician's recommendation. The fact that the decision is respected by the family further highlights the importance of autonomy in this situation. Respecting the patient's right to make choices regarding their own healthcare, even if it goes against medical advice, demonstrates a commitment to autonomy as an ethical principle.