Which of the following is a known cause of pulmonary emboli?

Pulmonary emboli are often caused by blood clots that travel to the lungs from the legs or other parts of the body, typically due to deep vein thrombosis (DVT). One of the well-documented risk factors for developing DVT is undergoing surgery, particularly major surgeries such as hip replacement. After such procedures, patients may experience reduced mobility, which can lead to stasis of blood flow and result in the formation of clots. These clots can dislodge and travel to the pulmonary circulation, causing a pulmonary embolism.

Regular exercise, a diet low in fats and sugars, and frequent hydration practices are not associated with increased risks for pulmonary emboli. In fact, regular physical activity can help reduce the risk of DVT by promoting healthy blood circulation. A balanced diet and proper hydration also support overall vascular health.