Theoretical analysis of chest wall mechanics

摘要: A mathematical model of the chest wall partitioned into rib cage, diaphragmatic and abdominal components is developed consistent with published experimental observations. The describes not only orthodox movements (rib cage abdomen expand together during inspiration) quietly breathing standing adult, but also Mueller maneuvers (inspiration against an occluded airway opening) paradoxical patterns contracts while expands observed in quadriplegia newborn. inferred to act as a cylinder reinforced by muscles functioning similarly bands around barrel. are though they were directly attached one another, being pressed skeleton. Furthermore, transabdominal pressure visualized acting, across isolated from diaphragm, has been suggested previously, instead, combined diaphragm acting deformable unit containing lungs.