| Popis: |
The HIP is defined as the level within the blood column of low pressure system (LPS) where no pressure change occurs during changes of body posture. The volume distribution along body axis follows the pressure distribution leading to an engorgement of the vascular bed below the HIP by the blood drained from regions above. There are only few measurements where the HIP was determined directly in an intact organism, furthermore a controversy exists about its exact location with respect to the heart. Gauer and Sieker (see Gauer and Thron, Handbook of Physiology, Sec. II: Circulation, Vol. III, pp 2410–2411, 1965) found the Hip below the heart, whereas Greganti and Guyton (Amer. J. Physiol. 183: 622, 1955) located the HIP within the right ventricle. |
