Cough Expectoration Zhengcuixia
Cough & Expectoration Zhengcuixia
Concept a protective reflex that can be controlled consciously Remove excessive secretion foreign material from the airway Initiated by miscellaneous stimuli or by voluntary exertion The most common respiratory symptom
Concept • A protective reflex that can be controlled consciously • Remove excessive secretion & foreign material from the airway • Initiated by miscellaneous stimuli or by voluntary exertion. • The most common respiratory symptom
Cough reflex Irritant type: mechanical, chemical inflammation Afferent inform from: larynx, trachea bifurcation of the bronchi Afferent fibers are in the vague nerve cough center
Cough reflex: •Irritant type: mechanical, chemical, inflammation •Afferent inform.from: larynx, trachea, bifurcation of the bronchi. •Afferent fibers are in the vague nerve cough center
Cough reflex Efferent signals larynx muscles of diaphragm, chest wall, abdomen A coordinated series of movement complete the cough. Deep inspiration -expiration effort with glottis closed-glottis open abruptly- high velocity of airflow brings out secretions from airways
Cough reflex • Efferent signals larynx muscles of diaphragm,chest wall, abdomen • A coordinated series of movement complete the cough. Deep inspiration – expiration effort with glottis closed- glottis open abruptly – high velocity of airflow brings out secretions from airways
Influencing factors depressed afferent or efferent nerve function Failed glottis function Diminished muscle force Obstructed airway seen in severe COPD Trachea intubation Chest or abdominal pain limit cough movement
Influencing factors • depressed afferent or efferent nerve function • Failed glottis function • Diminished muscle force • Obstructed airway seen in severe COPD • Trachea intubation • Chest or abdominal pain limit cough movement
Causes Airway stimulation by chemicals foreign material Airway infection inflammation Afferent nerve fiber Lung parenchyma disorders
Causes • Airway stimulation by chemicals & foreign material • Airway infection & inflammation • Afferent nerve fiber • Lung parenchyma disorders
Causes Pleural chest wall disorders Cardiovascular abnormalities Other causes Psychiatric cough
Causes • Pleural & chest wall disorders • Cardiovascular abnormalities • Other causes Psychiatric cough
classification Non production( dry cough Production(with sputum
classification • Non production ( dry cough ) • Production (with sputum)
Clinical appearance in common diseases Acute respiratory infection Exacerbation of chronic infectious illnesss COPD Bronchyactesis Chronic cough: postualnasal drip syndrom, cough type asthma smoker
Clinical appearance in common diseases • Acute respiratory infection • Exacerbation of chronic infectious illnesss COPD Bronchyactesis •Chronic cough: postualnasal drip syndrom, cough type asthma, smoker
Clinical appearance in common Iseases ° Neoplasms Pleural disease Cardiovascular diseases General disease affecting the respiratory system
Clinical appearance in common diseases • Neoplasms • Pleural disease • Cardiovascular diseases • General disease affecting the respiratory system