Final Exam: Lungs Flashcards
Acinus
Cluster of alveoli
Pores of Kohn present in
Type 1 pneumocytes
Pores of Kohn allow passage of
Gasses
Bacteria
Edema
Type 2 pneumocytes job
Produce surfactant
Repair alveolar epithelium
Alveolar macrophages job
Phagocytosis of inhaled microbes
Collapsed lung
Atelectasis
Atelectasis causes what 2 main problems in lungs
- Loss of lung volume
2. Limited gas exchange (shunt blood from PA)
All forms of Atelectasis cause
Dyspnea
Cyanosis
Cough
Chest pain
Hypoxemia
Abnormally low O2 in blood
Hypoxia
Inadequate O2 to tissues/ organs
3 types of atelectasis
Resorption
Compression
Contraction
Resorption atelectasis
Air can’t reach distal airways due to obstruction
Air in distal segments resorted by blood = tissue collapse
Sources of resorption atelectasis
Mucous plug Mucupurulent plug Aspiration Pulmonary fibrosis Tumor
Locates of resorption atelectasis
Single lobe
Entire lung
____ may be first sign of pulmonary malignancy
Resorption atelectasis
MC cause of compression atelectasis
Pleural effusion from advanced CHF
Compression atelectasis
Pleural cavity fills and compresses pulmonary air fields
Compression atelectasis can also be caused by
Hemothorax
Pneumothorax
Contraction atelectasis aka
Cicatrization atelectasis
Compression atelectasis aka
Passive atelectasis
Contraction atelectasis
Fibrotic changes restricting movement of thorax
___ atelectasis has limited recovery
Contraction
ARDS can result from what events?
Severe pneumonia Physical trauma Aspiration of water Superheated gas inhalation Sepsis
Acute respiratory distress syndrome
Respiratory failure after high traumatic event to lungs
Lethal complications of ARDS occurs in
40% of patients
Factors for poorer prognosis in ARDS
Advanced age
Sepsis
Multiple organ failure
ARDS causes what appearance on x ray
Bilateral opacity
Necrosis of pulmonary epithelial from ARDS causes accumulation of WBCs, which form..
Fibrin rich hyaline membrane
2 types of lung disease
Obstructive
Restrictive
Obstructive lung disease
Airflow resistance resulting in wheezing
Low expiratory flow rate
4 obstructive lung diseases
Emphysema
Chronic bronchitis
Bronchiectasis
Asthma
Restrictive lung disease
Decrease lung expansion
Decreased FVC
Normal expiration rate
Restrictive lung disease can be due to
Interstitial lung diseases
Chest wall disorders
Destroyed alveolar septa
Emphysema
Emphysema causes enlarged ___ which decrease ___
Acini
Surface area
Diffuse alveolar damage observed in
ARDS
Inflammation in emphysema increases ___ and __ and decreases ___
Proteases and ROS
Anti-proteases
Major risk for emphysema
Smoking
Nicotine chemoatttractant
Types of emphysema
Centriacinar
Panacinar
Centriacinar emphysema
MC type
Destroys central acinus, spares distal
Smoking MC risk
Panacinar emphysema
Uniform destruction of acini
Panacinar emphysema is ___ but ___ will accelerate
Genetic
Smoking
____ deficiency observed in panacinar emphysema, which increases Protein breakdown
Alpha 1 antitrypsin
Emphysema and asthma most severely effect
Exhalation
Chronic bronchitis MC males age
40-65
Mucus hypersecretion, resulting in mucous gland Hypertrophy and hyperplasia is observed in
Chronic bronchitis
Definition of chronic bronchitis
Persistent productive cough, 3 consecutive months in 2 consecutive years
Symptoms of chronic bronchitis
Dyspnea
Wheezing
Cyanosis
Weight gain
Yellow green sputum observed in
Chronic bronchitis
COPD composed of what 2 diseases
Emphysema and chronic bronchitis
COPD effects what percent of US adults
10
COPD
Irreversible airflow obstruction resulting in prominent wheezing and possibly pulmonary HTN
Curschmann spirals
Spiral shaped mucus plug
Charcot- Leyden Crystals
Breakdown of eosinophils
Reversible airway obstruction
Asthma
Atopic asthma aka
Extrinsic asthma
MC form of asthma
Atopic
Childhood onset
Family history
Environmental allergens (type 1 hypersensitivity)
All describe what
Atopic asthma
Atopic triad composed of
Eczema
Atopic asthma
Allergic rhinitis
Acute bronchitis
Viral
2 main risk factors for chronic bronchitis
Smoking
Air pollution
Non atopic asthma aka
Intrinsic asthma
Less common asthma type
Non atopic
Bronchial hyper-responsiveness
Various stimuli including stress, cold air, exercise, aspirin, irritants
All describe what
Non atopic asthma
Status asthmaticus
Acute severe asthma
No response to bronchodilators or steroids
Hypoxemia may be lethal
Permanent dilation of bronchi
Bronchiectasis
Hemoptysis and Purulent foul smelling sputum observed in
Bronchiectasis
Bronchiectasis located in
Lower lobes
May be localized or bilateral
Kartagener Syndrome
Autosomal recessive Disease resulting in defective cilia from mutated dynein
Kartagener syndrome causes poor
Mucociliary clearance
Kartagener syndrome in Fallopian tubes
Female sterility
Kartagener syndrome in flagella of sperm
Males sterility
Asthma results in broncho___
Constriction
Acini become hyperinflated
Chronic asthma
Necrotizing infection that results in obstruction and destruction of CT/ musculature
Bronchiectasis
Large stimulus for bronchiectasis
Kartagener syndrome
Situs inverses
Inverted organs