Pulmonary Flashcards
Obstructive lung disease
Airway narrow: restrict air mvt + often air trapping
FEV1/FVC ratio <70% (bcz FEV1↓) and RV↑
Causes: Asthma, Bronchiectasis, COPD, Cystic fibrosis, Obstruction (tracheal, bronchial)
Asthma (triggers, PE)
Reversible airway obstruct* (bronch hyperreactiv, infl, mucous plug, smooth M. hypertrophy)
Trig: allergens, URIs (multiple), cold air, exo, meds (NSAIDs/aspirin), stress
Ass w/ childhood eczema
Dry cough, episodic wheez, dyspn +/- tight chest (worse night/early morn); prolong expirat*, ↑access M. use, tachypn, tachycard
Late: ↓breath sounds (no wheez), cyanosis, ↓SaO2
Asthma (dg)
- Spirometry/PFTs (#1): ↓FEV1/FVC, ↑RV, ↑TLC but all Nl betw/ exacerb
- Methacholine challenge: if PFTs Nl but asthma suspic*
- ABGs: first acute resp alkalo +/- mild hypoxia; if resp acid or sev hypox so sev resp distress !!! hospit
- CXR: Nl to hyperinglat*
Asthma (ttt)
Avoid allergens/triggers
-Acute: O2, SABA (#1); ipratropium, systemic CS, Mg2+ if sev
Intubat*: sev or PCO2>50 or PO2<50
-Chronic: LABA +/or inhaled CS, systemic CS, cromolyn (just prophyl), theophylline (rare).
W/ inhaled ttt, can take PO antileukotr (zileuton, montelukast)
Asthma (4 types + chronic ttt)
- Mild interm: ≤2d/wk or ≤2 nights/mo; just PRN SABA
- Mild persist: >2x/wk but <1x/d or >2 nights/mo; low-dose inhal CS/day + PRN SABA
- Mod persist: daily or >1 night/wk; low/med-dose inhal CS/day and LABA/day + PRN SABA
- Sev persist: continual, fqt; high-dose inhal CS/day and LABA/day; possible PO CS; PRN SABA
Bronchiectasis (RF, PE)
Fibrosis, remodel, permanent dilat* of bronchi
By recurr inf/infl of bronch
Ass w/ Hx cystic fibr, pulm infs, hypersens, immdef, airw obstr, aspir, autoimm ds, IBD, ABPA, TB, MAC inf
Chronic productive cough, dyspn +/- hemoptysis; wheez, rhonchi, purulent mucus (yellow/green)
Bronchiectasis (dg, ttt)
Dg: CXR (↑bronchovasc marking, tram lines); high-resolut* CT (defin; dilated airw, balloon cysts); spirometry (↓FEV1/FVC)
ttt: AB (PO+inhal), inhal CS; bronch hygiene (cough, postural drainage, physiottt); surg (lobectomy or lung transplant)
Chronic obstructive pulmonary disease (2 types)
-Chronic bronchitis: product cough >3mo/y for 2 consecut years (dg clinic)
Overweight, edematous
Early hypercarbia/hypoxia (blue)
-Emphysema: destruc+dilat* distal to terminal bronchioles (dg histopath); 2* to smok (centrilobular) or to alpha1-antitr def (panlobular)
Thin, pursed lips
Late hypercarbia/hypoxia (pink)
Chronic obstructive pulmonary disease (PE, dg)
Most ptts combinat* of 2 types
Barrel chest, access chest M, JVD, end-expir wheez, dyspn on exert*, muffled breath sounds
Dg: PFTs (defin; ↓FEV1/FVC; Nl/↑TLC; ↓DLCO); CXR (hyperinfl lungs, parench bullae, subpleural blebs); ABGs (hypoxemia + resp acid, ↑PCO2); Gram/Cx sputum if inf
Chronic obstructive pulmonary disease (ttt)
O2 and stop smok: only ttt to improve survival
!!! not high O2 bcz worsen ventil/perfus* mismatch
-Acute exac: SABA + ipra/tiotrop, IV+/-inhal CS, AB, O2,
If sev: NIV w/ BiPAP or intubat*
-Chron exac: LABA + tiotrop, syst/inhal CS, O2, smok cessat*, pneumoc+flu vaccines
Restrictive lung disease
Loss of lung compliance (↑stiff + ↓expans*)
FEV1/FVC ≥70; ↓FVC and Nl FEV1; ↓RV
Alveolar, interstitial lung ds, inflammatory, idiopathic pulm fibrosis, neuromuscular, thoracic wall
Interstitial lung disease (causes)
Group of dso; inflammat* +/or fibrosis of interstitium
- Expo related: coal work pneumocon, asbest, silic, berylli, hypersens pneumo, radiat*, drugs (amiod, busulf, bleomy, long-term high-dose O2)
- Ass w/ system ds or connect T ds: polymyos, dermatomyo, sarcoid, amyloid, vasculitis, CREST
- Idiop: idiop pulm fibrosis, COP, acute interst pneumo
Interstitial lung disease (PE, dg)
Shallow rapid breath, dyspn w/ exert*, chron nonprod cough +/- cyanosis, inspir squeaks, crackles, clubbing, RHF
Dg: CXR/CT (#1; retic/nodul/ground-glass, honey comb if sev); PFTs (↓TLC, ↓FVC, ↓FLCO, Nl FEV1/FVC); surg biopsy (defin, confirm)
Interstitial lung disease (ttt)
Avoid expo
Anti-infl or immunosuppr (CS)
Antifibrotic (for IPF)
Surg (lung transplant)
Systemic sarcoidosis (PE)
Noncaseating granulomas; esp black women
~30-40yo
Fev, cough, malaise, ↓weight, dyspn, arthritis
Exam: lungs, liver, eyes, skin (eryth nodos), nerv, heart, kidney
Löfgren sd: type of sarc w/ triad arthritis, eryth nodosum, bilat hilar adenopathy
Systemic sarcoidosis (dg, ttt)
Dg: CXR/CT (#1; hilar LNpathy, nodules); biopsy (defin; LN or lung; noncaseating granulomas)
PFTs (restric or obstruct; ↓DLCO); ↑serum ACE; hyperCa; ↑ALP; …
ttt: systemic CS
Hypersensitivity pneumonitis (causes, PE)
Alv thick + noncaseat granulom
2* to environm expo (mold, hot tubs, down feather Ag)
- Acute: dyspn, fev, mal, shiv, cough 4-6h after expo
- Chronic: progr dyspn, fine bilat rales
Hypersensitivity pneumonitis (dg, ttt)
Dg: job/travel Hx; CXR/CT (esp upper lobe fibrosis in chronic)
ttt: avoid ongoing expo; CS
Pneumoconiosis
RF: prolong expo + inhal of small inorganic particles
4 types: asbestosis, coal worker’s ds, silicosis, berylliosis
ttt: avoid triggers, support ttt, O2
Asbestosis
Insulat, construct, demolit*, shipbuilding
After 15-20y of expo
Linear opacities at bases, interst fibrosis, calcif pleural plaques, ferruginous bodies
↑R mesothelioma (rare), lung cancer (higher in smokers)