Pathogenesis of RF Disorders of external respiratory function pulmonary ventilation disturbance pulmonary gas exchange disturbance
11 • Pathogenesis of RF: Disorders of external respiratory function pulmonary ventilation disturbance pulmonary gas exchange disturbance
I pulmonary ventilation disturbance i. Types and Causes restrictive hy hypoventilation obstructive hypoventilation
12 Ⅰ.pulmonary ventilation disturbance i. Types and Causes restrictive hypoventilation obstructive hypoventilation
Causes of re Disorders of: Central Nervous System Spinal cord Neuromuscular System the chest wall and pleura the airway
13 • Causes of RF Disorders of: Central Nervous System Spinal Cord Neuromuscular System the chest wall and pleura the airway
component elements causing ventilation disturbance Airway thorax wall straitness damaged or block Inhibition ofr center Lung elastic High spinal resistance cord increased damaged weakness R. M Anterior angle ce‖l damaged phrenIc nerve damaged
14 component elements causing ventilation disturbance Lung elastic resistance increased High spinal cord damaged Anterior angle cell damaged Inhibition of R. center phrenic nerve damaged weakness of R. M thorax wall damaged Airway straitness or block
1. Restrictive hypoventilation Causes and mechanisms. &s impaired activity of respiratory muscle(dysfunction of CNS neural. muscle etc decreased compliance of thorax (chest malformation pleura fibrosis) .s decreased compliance of lungs (pulmonary edema inflammation, fibrosis, insufficient surfactant) thorax fluidify or pneumothorax
15 Causes and mechanisms: ❖ impaired activity of respiratory muscle (dysfunction of CNS, neural, muscle etc.) ❖ decreased compliance of thorax (chest malformation , pleura fibrosis) ❖ decreased compliance of lungs (pulmonary edema , inflammation , fibrosis, insufficient surfactant) ❖ thorax fluidify or pneumothorax 1. Restrictive hypoventilation: