Correct Answer: C

Rationale: The correct answer is C because a respiratory rate of 32 breaths/minute indicates increased work of breathing, which could be due to secretions that need to be suctioned. High respiratory rate may suggest inadequate oxygenation and ventilation. Oxygen saturation of 93% (choice A) is within an acceptable range and does not necessarily indicate the need for suctioning. Time since last suctioning (choice B) should be considered but is not as immediate an indication as an increased respiratory rate. Occasional audible expiratory wheezes (choice D) may be indicative of other respiratory issues but do not directly indicate the need for suctioning.

Correct Answer: A

Rationale: The correct answer is A: Apply external cooling device. Therapeutic hypothermia is a treatment used to protect the brain after cardiac arrest by lowering the body temperature. The nurse should use external cooling devices, such as cooling blankets or ice packs, to achieve and maintain the desired temperature. This method allows for precise temperature control and monitoring. Checking mental status every 15 minutes (choice B) is not the priority as maintaining the temperature is crucial. Avoiding sedative medications (choice C) may be necessary to accurately assess the patient's neurological status. Rewarming if the temperature is <91°F (32.8°C) (choice D) is incorrect as the goal is to maintain hypothermia for a specific duration before gradual rewarming.

Correct Answer: B

Rationale: The correct answer is B: Hypoxemia and compensated respiratory acidosis. The patient's pH is within normal range (7.35), indicating compensation. The elevated PaCO2 (55 mm Hg) indicates respiratory acidosis due to inadequate ventilation, likely from COPD. The low PaO2 (65 mm Hg) indicates hypoxemia, common in pneumonia. The normal bicarbonate level (30 mEq/L) suggests metabolic compensation for respiratory acidosis. Choice A is incorrect as there is no metabolic alkalosis present. Choice C is incorrect as the patient has hypoxemia. Choice D is incorrect as the patient is showing compensated respiratory acidosis, not uncompensated.

Correct Answer: A

Rationale: The correct answer is A: Assessing the patient's level of pain. In this situation, the patient's tachycardia, hypertension, and increased respiratory rate could be indicative of pain. By assessing the patient's pain level, the nurse can address any discomfort the patient may be experiencing, which could be contributing to these physiological responses. Summary of other choices: B: Decreasing the SIMV rate on the ventilator - This is not the priority intervention as the patient's symptoms are more likely related to pain rather than the ventilator settings. C: Providing sedation as ordered - Sedation is not the priority in this case as the patient has been tolerating the ventilator well without requiring sedation. D: Suctioning the patient again - Since the airway has been recently cleared, suctioning again is not necessary at this point and would not address the underlying cause of the patient's symptoms.

Correct Answer: A

Rationale: The correct answer is A because PE should be suspected in patients with unexplained cardiorespiratory complaints and risk factors for VTE. This is important because PE can present with nonspecific symptoms, making it crucial to consider it in the differential diagnosis. Explanation: 1. PE can present with various symptoms, including dyspnea, chest pain, and hemoptysis, but these are not present in all patients. 2. Bradycardia and hyperventilation are not classic symptoms of PE, as it can present with tachycardia and other respiratory findings. 3. Critically ill patients are actually at higher risk for VTE and PE, so prophylaxis is typically recommended. In summary, choice A is correct because it emphasizes the importance of considering PE in patients with cardiorespiratory complaints and risk factors for VTE, while the other choices contain inaccuracies or incomplete information.