Correct Answer: D

Rationale: The correct answer is D: Sigmoidoscopy. This procedure allows direct visualization of the lower colon and rectum, enabling the detection of colorectal cancer. Stool hematest (A) detects blood in the stool but does not confirm cancer. Abdominal CT (B) can show abnormalities but is not specific for colorectal cancer. CEA scan (C) measures a tumor marker but is not definitive for diagnosis. Sigmoidoscopy (D) is the gold standard for diagnosing colorectal cancer as it allows for direct visualization and tissue biopsy.

Correct Answer: B

Rationale: The correct answer is B: Renal failure. Acute respiratory distress syndrome (ARDS) can lead to hypoxemia and respiratory acidosis, causing decreased perfusion to the kidneys and potentially leading to renal failure. Monitoring for signs of renal failure, such as decreased urine output and elevated creatinine levels, is crucial in managing clients with ARDS. Incorrect choices: A: Chest wall bulging is not a common complication of ARDS. It may be seen in conditions like tension pneumothorax. C: Difficulty swallowing is not a typical complication of ARDS. It may be seen in neurological conditions or esophageal disorders. D: Orthopnea is not a direct complication of ARDS. It is more commonly associated with heart failure or pulmonary edema.

Correct Answer: D

Rationale: The correct answer is D: Shallow breathing and increasing lethargy. This finding could indicate a potential respiratory complication such as atelectasis or pneumonia, which are common postoperative complications. Shallow breathing can lead to inadequate oxygenation and ventilation, causing lethargy due to decreased oxygen delivery to tissues. It is crucial to assess and address respiratory issues promptly to prevent further complications. A: Abdominal pain is expected postoperatively and can be managed with pain medications. B: Serous drainage from the incision is a normal finding after surgery and indicates the wound is healing properly. C: Hypoactive bowel sounds are common after surgery due to decreased peristalsis and can be managed with interventions such as early ambulation and medications.

Correct Answer: B

Rationale: The correct answer is B: Have him breathe into a paper bag. Breathing into a paper bag helps increase the carbon dioxide levels in the blood, which can help reverse respiratory alkalosis caused by hyperventilation during an anxiety attack. This intervention helps to normalize the blood pH and alleviate symptoms. Incorrect choices: A: Making sure oxygen is administered as ordered is not appropriate for respiratory alkalosis due to hyperventilation. Oxygen therapy can worsen the condition by further reducing carbon dioxide levels. C: Placing the student in a semi-fowler's position does not directly address the primary issue of respiratory alkalosis and anxiety-induced hyperventilation. D: Coughing and deep breathing exercises may exacerbate the hyperventilation and worsen the respiratory alkalosis rather than alleviate the symptoms.

Correct Answer: D

Rationale: The correct answer is D because the absence of skin breakdown indicates that the turning schedule was effective in preventing pressure ulcers. Skin breakdown is a key indicator of pressure ulcer development, so its absence suggests that the patient's skin integrity was maintained. Choice A is incorrect because documentation alone does not guarantee successful prevention. Choice B is incorrect as redness on the heels can still indicate the early stages of pressure ulcers. Choice C is unrelated to skin integrity and pressure ulcer prevention.