Correct Answer: D

Rationale: Cor pulmonale is a condition characterized by right heart failure secondary to pulmonary hypertension, which is often caused by chronic hypoxemia. Chronic hypoxemia occurs in conditions such as chronic obstructive pulmonary disease (COPD) where there is limited airflow in and out of the lungs, leading to low oxygen levels in the blood. However, the specific characteristic of pulmonary hypertension leading to right heart failure distinguishes cor pulmonale from COPD. Other conditions like idiopathic pulmonary fibrosis (IPF) and pulmonary embolism (PE) may also lead to hypoxemia but are not primarily associated with pulmonary hypertension and right heart failure as in cor pulmonale.

Correct Answer: A

Rationale: Bleeding is the most serious complication of Dengue infection, typically occurring between the 4th to 7th day after the onset of symptoms. This is known as the critical phase of Dengue fever, where the patient is at a higher risk of developing severe symptoms such as bleeding manifestations. Monitoring for symptoms of bleeding during this period is crucial for timely intervention and proper management to prevent further complications or fatalities. While bleeding can occur outside this timeframe in some cases, the 4th to 7th day window is when the risk is highest and vigilance is most needed.

Correct Answer: D

Rationale: Cor pulmonale is a condition characterized by right heart failure secondary to pulmonary hypertension, which is often caused by chronic hypoxemia. Chronic hypoxemia occurs in conditions such as chronic obstructive pulmonary disease (COPD) where there is limited airflow in and out of the lungs, leading to low oxygen levels in the blood. However, the specific characteristic of pulmonary hypertension leading to right heart failure distinguishes cor pulmonale from COPD. Other conditions like idiopathic pulmonary fibrosis (IPF) and pulmonary embolism (PE) may also lead to hypoxemia but are not primarily associated with pulmonary hypertension and right heart failure as in cor pulmonale.

Correct Answer: B

Rationale: The nurse should monitor the International Normalized Ratio (INR) closely during anticoagulant therapy for the prevention of VTE. The INR measures the clotting ability of the blood and is used to monitor the effectiveness of anticoagulant therapy, such as warfarin. Maintaining the INR within the target therapeutic range is crucial to prevent both excessive bleeding due to over-anticoagulation and clotting events due to under-anticoagulation. Close monitoring of the INR helps healthcare providers adjust the anticoagulant dosage as needed to ensure optimal therapeutic outcomes and minimize risks. Platelet count, serum sodium levels, and blood urea nitrogen (BUN) are important laboratory parameters to monitor for other medical conditions but are not specific to anticoagulant therapy.

Correct Answer: A

Rationale: The appropriate nursing intervention in this case is to encourage the mother to walk to facilitate labor progression. The patient is in early labor with contractions every 5 minutes, lasting 45 seconds each, and her cervix is dilated to 3 cm. Encouraging the mother to walk can help gravity assist the descent of the baby and promote cervical dilation. Walking can also help alleviate some discomfort and encourage labor progression. It is important to promote natural, non-invasive methods to support the progress of labor before considering medical interventions such as oxytocin or cesarean section. Relaxation techniques can also be beneficial in managing pain during labor.