Ocular changes over 60 min in supine and prone postures

Pulmonary perfusion in the prone and supine postures in the normal human lung.

Prone posture increases cardiac output and improves pulmonary gas exchange. We hypothesized that, in the supine posture, greater compression of dependent lung limits regional blood flow. To test this, MRI-based measures of regional lung density, MRI arterial spin labeling quantification of pulmonary perfusion, and density-normalized perfusion were made in six healthy subjects. Measurements were...

Ontogenetic Correspondences in the Supine and Prone Postures of the Human Infant *

In the early human fetus the arms are much longer than the legs. At birth, arms and legs are almost equal in length. In the young adolescent the legs are longer than the arms. This progressive reversal in proportions reflects evolutionary changes wrought over many millions of years. The gluteal musdes of the newborn infant are notably under-developed, a condition comparable to that of the chimp...

Lung ventilation and perfusion in prone and supine postures with reference to anesthetized and mechanically ventilated healthy volunteers.

BACKGROUND The literature on ventilation (V) and lung perfusion (Q) distributions during general anesthesia and controlled mechanical ventilation in supine and prone position is contradictory. The authors aimed to investigate whether V, Q, and ventilation to perfusion ratio (V/Q ratio) matching in anesthetized and mechanically ventilated volunteers are gravity dependent irrespective of posture....

Deformable Registration of Supine and Prone

comparative study of hemodynamics electrolyte and metabolic changes during prone and complete supine percutaneous nephrolithotomy

background nowadays percutaneous nephrolithotomy (pcnl) is performed in prone and supine positions. physiologic solutions should be used to irrigate during pcnl. irrigation can cause hemodynamic, electrolyte and acid-base changes during pcnl. objectives the current study aimed to compare the electrolyte, hemodynamic and metabolic changes of prone and complete supine pcnl. patients and methods i...