Final answer:
Phlebothrombosis is more likely to result in pulmonary emboli compared to thrombophlebitis due to the ability of the blood clot to break off and become lodged in a pulmonary artery.
Step-by-step explanation:
Phlebothrombosis is more likely to result in pulmonary emboli compared to thrombophlebitis because the blood clot formed in phlebothrombosis can break off, travel through the blood vessels, and become lodged in a pulmonary artery. This can partially or completely block the flow of blood to the lungs, leading to serious consequences like lung damage or instant death. On the other hand, thrombophlebitis refers to the inflammation of a vein with the formation of a blood clot, but the clot is less likely to break off and cause a pulmonary embolism.