Gravity also affects the intrapleural pressure, causing the intrapleural pressure to be increased at the base relative to the apex. Conversely, the blood flow at the apex is generally lower, which results in decreased perfusion. This increased pressure results in distension of the pulmonary blood vessels at the base and an increase in blood flow and perfusion. The blood pressure at the base of the lungs is higher than the blood pressure at the apex because of the weight of the column of blood. Gravity also plays a significant role in determining the V/Q ratio.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |