[header] How to prevent pulmonary embolism [title] Drink water while traveling. [step] Traveling can dehydrate your body, especially long-distance travel. Dehydration can increase your risk of having a pulmonary embolism. 
Drink 2 cups (470 ml) of water every hour to stay hydrated. [substeps] If you will be traveling for 1 to 3 hours, bring 1 to 2 water bottles with you.