History | Diving Disease

History The connection between pressure and the solubility of gases in liquids was established as early as 1670 by Robert Boyle.However, it was not until 1857 that Felix Hoppe-Seyler established the theory of gas embolism as the cause of decompression sickness. There were then further investigations on diving depth and diving time. However, it was … History | Diving Disease

Ventilation-perfusion Relationship: Function, Tasks, Role & Diseases

The ventilation-perfusion ratio describes the quotient of pulmonary ventilation and pulmonary perfusion. Normal values of the ratio range from 0.8 to one in a healthy individual. Deviations are based on the principle of an intrapulmonary right-to-left shunt or increased alveolar dead space ventilation. What is the ventilation-perfusion ratio? The ventilation-perfusion ratio refers to the relationship … Ventilation-perfusion Relationship: Function, Tasks, Role & Diseases