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Respiratory System Paths
Memoona Arshad Batch 10
CHRONIC OBSTRUCTIVE PULMONARY
DISEASE
• COPD is a group of disorders characterized
by airflow obstruction
• The following 4 entities are included in COPD:
• Bronchial asthma
• Chronic bronchitis
• Emphysema
• Bronchiectasis
Bronchial asthma
• Asthma is a disease of airways that is characterized by increased
responsiveness of the tracheobronchial tree to a variety of stimuli resulting in
widespread spasmodic narrowing of the air passages which may be relieved
spontaneously or by therapy.
TYPES
• Extrinsic (immune) asthma is mediated by a type I hypersensitivity
response
• Disease begins in childhood
• Intrinsic (nonimmune) asthma includes asthma associated with chronic
bronchitis or exercise- or cold-induced asthma.
• It usually begins in adult life
Characteristics
• Type 1 hypersensitivity reaction
• Involving Reversible Inflammation of Alveolar sac
• Marked episodic dyspnea and wheezing expiration
• Status asthmaticus severe and unremitting form of the disease that may
prove fatal.
Pathologic Findings
• Bronchial smooth muscle hypertrophy
• Hyperplasia of bronchial submucosal glands and goblet cells
• Airways plugged by viscid mucus containing Curschmann spirals,
eosinophils, and Charcot-Leyden crystals
Chronic bronchitis
• The clinical definition is a productive cough that occurs during at least three
consecutive months over at least two consecutive years.
• Is clearly linked to cigarette smoking.
• It may lead to cor pulmonale
• Involving Irreversible Inflammation of Alveolar sac
Pathologic Findings
• Hyperplasia of bronchial submucosal glands, leading to increased Reid index,
ratio of the thickness of the gland layer to that of the bronchial wall
Emphysema
• Emphysema is dilation of air spaces
• The disease is strongly associated with cigarette smoking
• Clinical characteristics:
o Increased anteroposterior diameter of the chest;
o Increased total vital capacity;
oHypoxia, cyanosis, and respiratory acidosis
Types
• Centrilobular emphysema: Dilation of the respiratory bronchioles is most
often localized to the upper part of the pulmonary lobes.
• It is strongly associated with cigarette
• Panacinar emphysema: Dilation of the entire acinus
• It is associated with genetically determined deficiency of α1 -antitrypsin (α1 -
protease inhibitor).
Pathologic Findings
• Abnormal dilation of air spaces with destruction of alveolar walls. Reduced
lung elasticity
Bronchiectasis
• This condition is permanent
abnormal bronchial dilation
caused by chronic infection.
Predisposing factors
• Include bronchial obstruction, most often by tumor.
• Chronic sinusitis
• Rarely may be a manifestation of Kartagener syndrome (sinusitis,
bronchiectasis, and situs inversus, sometimes with hearing loss and male
sterility)
Characteristics
• Production of copious purulent sputum
• Hemoptysis
• Recurrent pulmonary infection that may lead to lung abscess.
CHRONIC RESTRICTIVE PULMONARY
DISEASE
• Restrictive pulmonary disease is a group of disorders characterized by
reduced expansion of the lung and reduction in total lung capacity.
• Abnormalities of the chest wall from bony abnormalities or neuromuscular
disease that restrict lung expansion.
• Interstitial lung diseases
• Adult and neonatal respiratory distress syndromes
• Pneumoconiosis
• Diseases of unknown etiology, such as sarcoidosis and idiopathic pulmonary
fibrosis
Bony Abnormalities of Chest Wall
Pneumoconiosis
• These environmental diseases are caused by inhalation of inorganic dust
particles.
• These diseases are, therefore, also called ‘dust diseases’ or ‘occupational lung
diseases’.
Types
• Main Types are:
Coal workers’ pneumoconiosis
Silicosis
Asbestosis
Coal workers’ pneumoconiosis
• Caused by inhalation of coal dust.
• Simple coal workers’ pneumoconiosis is marked by coal macules around the
bronchioles, formed by ingestion of coal dust particles by macrophages.
• In most cases, it is inconsequential and produces no disability.
• Progressive massive fibrosis is
marked by fibrotic nodules filled
with necrotic black fluid.
• It can result in bronchiectasis,
pulmonary hypertension, or death
from respiratory failure or right-
sided heart failure.
Silicosis
• Caused by exposure to free silica dust.
• Occupation Associated:
Miners
Glass manufacturers
 Stone cutters
Pathophysiology
• This disease is initiated by ingestion of silica dust by alveolar macrophages.
• Silicotic nodules that enlarge and eventually obstruct the airways.
• Silicosis is associated with increased susceptibility to tuberculosis; the frequent
concurrence is referred to as silicotuberculosis.
Asbestosis
• Inhalation of asbestos fibers.
• Occupation Associated:
Shipyard Workers
Roofing
• It can lead to lung cancer
Pathophysiology
• This disease is initiated by uptake of asbestos fibers by alveolar macrophages.
• A fibroblastic response occurs & leads to diffuse interstitial fibrosis, mainly in
the lower lobe.
• Characteristic features:
 Ferruginous bodies (yellow-brown,
rod-shaped bodies with clubbed ends)
Dense hyalinized fibrocalcific plaques of the
parietal pleura are also present.
The End

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Respiratory System Paths.pptx

  • 2. CHRONIC OBSTRUCTIVE PULMONARY DISEASE • COPD is a group of disorders characterized by airflow obstruction
  • 3. • The following 4 entities are included in COPD: • Bronchial asthma • Chronic bronchitis • Emphysema • Bronchiectasis
  • 4. Bronchial asthma • Asthma is a disease of airways that is characterized by increased responsiveness of the tracheobronchial tree to a variety of stimuli resulting in widespread spasmodic narrowing of the air passages which may be relieved spontaneously or by therapy.
  • 5. TYPES • Extrinsic (immune) asthma is mediated by a type I hypersensitivity response • Disease begins in childhood • Intrinsic (nonimmune) asthma includes asthma associated with chronic bronchitis or exercise- or cold-induced asthma. • It usually begins in adult life
  • 6. Characteristics • Type 1 hypersensitivity reaction • Involving Reversible Inflammation of Alveolar sac • Marked episodic dyspnea and wheezing expiration • Status asthmaticus severe and unremitting form of the disease that may prove fatal.
  • 7. Pathologic Findings • Bronchial smooth muscle hypertrophy • Hyperplasia of bronchial submucosal glands and goblet cells • Airways plugged by viscid mucus containing Curschmann spirals, eosinophils, and Charcot-Leyden crystals
  • 8. Chronic bronchitis • The clinical definition is a productive cough that occurs during at least three consecutive months over at least two consecutive years. • Is clearly linked to cigarette smoking. • It may lead to cor pulmonale • Involving Irreversible Inflammation of Alveolar sac
  • 9. Pathologic Findings • Hyperplasia of bronchial submucosal glands, leading to increased Reid index, ratio of the thickness of the gland layer to that of the bronchial wall
  • 10. Emphysema • Emphysema is dilation of air spaces • The disease is strongly associated with cigarette smoking • Clinical characteristics: o Increased anteroposterior diameter of the chest; o Increased total vital capacity; oHypoxia, cyanosis, and respiratory acidosis
  • 11. Types • Centrilobular emphysema: Dilation of the respiratory bronchioles is most often localized to the upper part of the pulmonary lobes. • It is strongly associated with cigarette • Panacinar emphysema: Dilation of the entire acinus • It is associated with genetically determined deficiency of α1 -antitrypsin (α1 - protease inhibitor).
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  • 13. Pathologic Findings • Abnormal dilation of air spaces with destruction of alveolar walls. Reduced lung elasticity
  • 14. Bronchiectasis • This condition is permanent abnormal bronchial dilation caused by chronic infection.
  • 15. Predisposing factors • Include bronchial obstruction, most often by tumor. • Chronic sinusitis • Rarely may be a manifestation of Kartagener syndrome (sinusitis, bronchiectasis, and situs inversus, sometimes with hearing loss and male sterility)
  • 16. Characteristics • Production of copious purulent sputum • Hemoptysis • Recurrent pulmonary infection that may lead to lung abscess.
  • 17. CHRONIC RESTRICTIVE PULMONARY DISEASE • Restrictive pulmonary disease is a group of disorders characterized by reduced expansion of the lung and reduction in total lung capacity. • Abnormalities of the chest wall from bony abnormalities or neuromuscular disease that restrict lung expansion.
  • 18. • Interstitial lung diseases • Adult and neonatal respiratory distress syndromes • Pneumoconiosis • Diseases of unknown etiology, such as sarcoidosis and idiopathic pulmonary fibrosis
  • 19. Bony Abnormalities of Chest Wall
  • 20. Pneumoconiosis • These environmental diseases are caused by inhalation of inorganic dust particles. • These diseases are, therefore, also called ‘dust diseases’ or ‘occupational lung diseases’.
  • 21. Types • Main Types are: Coal workers’ pneumoconiosis Silicosis Asbestosis
  • 22. Coal workers’ pneumoconiosis • Caused by inhalation of coal dust. • Simple coal workers’ pneumoconiosis is marked by coal macules around the bronchioles, formed by ingestion of coal dust particles by macrophages. • In most cases, it is inconsequential and produces no disability.
  • 23. • Progressive massive fibrosis is marked by fibrotic nodules filled with necrotic black fluid. • It can result in bronchiectasis, pulmonary hypertension, or death from respiratory failure or right- sided heart failure.
  • 24. Silicosis • Caused by exposure to free silica dust. • Occupation Associated: Miners Glass manufacturers  Stone cutters
  • 25. Pathophysiology • This disease is initiated by ingestion of silica dust by alveolar macrophages. • Silicotic nodules that enlarge and eventually obstruct the airways. • Silicosis is associated with increased susceptibility to tuberculosis; the frequent concurrence is referred to as silicotuberculosis.
  • 26. Asbestosis • Inhalation of asbestos fibers. • Occupation Associated: Shipyard Workers Roofing • It can lead to lung cancer
  • 27. Pathophysiology • This disease is initiated by uptake of asbestos fibers by alveolar macrophages. • A fibroblastic response occurs & leads to diffuse interstitial fibrosis, mainly in the lower lobe. • Characteristic features:  Ferruginous bodies (yellow-brown, rod-shaped bodies with clubbed ends) Dense hyalinized fibrocalcific plaques of the parietal pleura are also present.
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