Correct Answer: C

Rationale: After an embolus becomes trapped in the pulmonary microvasculature, dead space increases. Dead space refers to the portion of the lung that is ventilated but not perfused, resulting in reduced gas exchange. When a pulmonary embolus blocks blood flow within a pulmonary vessel, it leads to a mismatch between ventilation and perfusion in the affected lung region. This mismatch results in increased dead space, as ventilation continues in areas that are not effectively perfused. As dead space increases, the overall efficiency of gas exchange in the lung is impaired, potentially leading to hypoxemia.

Correct Answer: C

Rationale: Swelling in one leg with edema is a classic sign of deep venous thrombosis (DVT). DVT occurs when a blood clot forms in one or more of the deep veins in the body, usually in the legs. This can lead to swelling in the affected leg due to the impaired venous return caused by the blood clot. It is important for the nurse to recognize this sign because if left untreated, DVT can lead to serious complications such as pulmonary embolism. Therefore, the nurse should further assess the client and notify the healthcare provider for appropriate management.

Correct Answer: B

Rationale: B. Recommendations for perineal cleansing: Proper perineal hygiene is important in preventing urinary tract infections (UTIs). Teaching the patient to cleanse the perineal area properly can help reduce the risk of UTIs.

Correct Answer: B

Rationale: The client with cardiomyopathy may experience decreased cardiac output, which is a common manifestation of this condition. Cardiomyopathy is a disease of the heart muscle that makes it harder for the heart to pump blood to the rest of the body. Reduced cardiac output means that less blood is being pumped out by the heart with each beat, leading to symptoms such as fatigue, weakness, and the need to rest between activities. This is why the client is experiencing the need to rest between activities during the day.

Correct Answer: C

Rationale: After an embolus becomes trapped in the pulmonary microvasculature, dead space increases. Dead space refers to the portion of the lung that is ventilated but not perfused, resulting in reduced gas exchange. When a pulmonary embolus blocks blood flow within a pulmonary vessel, it leads to a mismatch between ventilation and perfusion in the affected lung region. This mismatch results in increased dead space, as ventilation continues in areas that are not effectively perfused. As dead space increases, the overall efficiency of gas exchange in the lung is impaired, potentially leading to hypoxemia.