Pulmonary Flashcards
normal vs restrictive vs obstructive values for pulmonary function tests: FVC
normal FVC: 5 L
restrictive: lower
obstructive: normal or lower
normal vs restrictive vs obstructive values for pulmonary function tests: FEV1
normal: 3.75 L
restrictive: lower
obstructive: much lower
normal vs restrictive vs obstructive values for pulmonary function tests: FEV1/FVC
normal: 70-75%
restrictive: higher
obstructive: lower
which blood has a higher hemoglobin saturation and thus higher Po2; venous or arterial blood?
arterial
explain the following lung imaging finding:
border between same density organ is lost
silhouette sign; usually caused by a pneumonia
explain the following lung imaging finding:
dark markings on abnormal white lung
alveoli are fluid filled; air in bronchi visible on xray
at what cardiac size is imaging positive for enlarged cardiac silhouette?
if the size of the heart is greater than half the width of the chest
explain the following lung imaging finding:
fundus of stomach appears as a fluid density or air fluid level behind the heart
hiatal hernia
explain the following lung imaging finding:
jagged edges at the lateral aspect of the image
rib fracture; watch for pneumothorax
explain the following lung imaging finding:
“fluffy” multiple white lines
diffuse interstitial pneumonia
explain the following lung imaging finding:
blunt costophrenic angles
pleural effusion
causes of lungs appearing too white on xray
pneumonia
TB
atelectasis
lung cavity, nodule, or mass
pleural effusion
congestive hearrt failure
chronic interstitial disease (confined to a particular area)
more common causes of diffuse interstitial pneumonia
viral agents or mycoplasma
primary and secondary TB infection lung findings
primary infxn seen in upper lobes with pleural effusion and hilar lymph node enlargement
secondary infxn xray is normal or shows small calcifications in lungs and lymph nodes
causes of lungs to appear too black on xray
pneumothroax (air b/w pleura rising to highest point in chest; black w dec number of vessels)
PE (blood supply to lungs cut off)
____ collects at the highest point in the chest, as opposed to ____ which collects at the lowest point
air = highest
fluid = lowest
image of choice for lung / chest masses
CT to avoid motion artifact from breathing
NON sedating H1 receptor antagonists names and doses
fexofenadine (allegra): 30, 60, 180 mg
loratadine (claritin) : 5-10 mg
certirizine (zyrtec): 5 and 10 mg
NON sedating H1 antagonist AE and CI
loratadine & fexofenadine:
CI with use of erythromycin, ketoconazole, or itraconazole due to fatal arrythmias
avoid in severe renal impairment
no grapefruit/OJ/apple for 4 hours
certirizine:
avoid alcohol, sedative, tranquilizers > CNS depression
diphenhydramine medication class and uses
sedating h1 receptor antagonists
used for allergic rxns from type 1 allergies and insomnia
diphenhydramine AE and CI
AE: seizures, sedation, n/v, dry mouth, epigastric distress, thrombocytopenia, agranulocytosis
CI with CNS depressants and MAO inhibitors
diphenhydramine dosage
12.5, 25, 50 mg
epinephrine MOA and uses
anaphylactic shock; vasodilation of B2 receptors (and vasoconstriction a1)
epinephrine AE
cerebral hemorrhage, CVA, HTN, tachycardia, v fib, shock, n/v, HA, drowsiness
oxymetazoline MOA and uses
nasal spray or eye drop; a1 receptor stimulant; vasoconstriction
used for congestion
oxymetazoline AE/CI
arrythmia, anaphylaxis, asthmatic episodes, HA
do not use with MAO inhibitors or severe HTN
albuterol MOA and uses
short acting b2 adrenergic agonists that causes bronchodilation; acute ashtma; acts in <15 mins, lasts 3-4 hours
medications for short term asthma management
short acting beta agonists
anticholinergics
systemic corticosteroids
magnesium sulfate (IV) - emergency
long term asthma control medications
inhaled corticosteroids
long acting beta agonists
leukotriene modifiers
mast cell stabilizers
biologics (immune; for severe asthma)
albuterol AE /CI
nervousness, tremor, tachycardia, HA, palpitations, n/v, bronchospasm
avoid use with CNS stimulants
ipratropium med class and uses
anticholinergic bronchodilator (parasympathoLYTIC); asthma/COPD bronchospasm relief in combo with SABAs; esp in emergency settings
fluticasone/budesonide med type, asthma use, dosage
inhaled corticosteroids; dec inflammation in airways
used daily
salmeterol med type, asthma use, dosage
long acting beta 2 agonist; used with ICS for long term control, not for acute sx
1-2 inhalations daily; 1.5 hours before exercise for exercise induced
montelukast med type, asthma use, dosage
leukotriene modifier, dec inflammation/bronchoconstriction, taken daily PO
cromolyn med type, asthma use, dosage
mast cell stabilizer, prevents degranulation of inflammatory mediators from mast cells
usually inhaled/nasal/opti - dosed frequently
prophylaxis only
guaifenesin med class, MOA, uses
mucolytic; decreases viscosity of secretions, expectorant (does NOT suppress cough)
acetylcysteine med class, MOA, uses
reduces viscocity of respiratory tract fluid; mucolytic at high doses
used for pneumonia, bronchitis, TB, CF, emphysema, etc
antidote for acetominophen overdose
acetylcysteine SE/cautions
rhinorrhea, stomatitis, n/v, bronchospasm
activated charcoal dec effectiveness
glucocorticoid AE/caution
water retention and CV problems
long term: osteoporosis, peptic ulcer
inhaled steroids less systemically absorbed
steroid drug suffixes
-sone
-zone
-onide
cromolyn AE/caution
throat irritation
do not use during acute asthma attacks