Pulmonology Flashcards
Tactile Fremitus is?
Incr in what?
Decr in what?
Palpable vibrations transmitted through
bronchopulmonary tree to chest wall when patient speaks (i.e. “99”)
- Incr with pneumonia
- Decr w/ COPD
Percussion of chest wall
- Resonant —>generally healthy lung
- Flat or dull —> lobar pneumonia or pleural effusion
- Hyperresonant (low, loud, booming sound) —> COPD or pneumothorax
FEV1/FVC Ratio is ? Nl is ?
volume exhaled in 1 sec / total volume exhaled after maximal exhalation
nl is 75-85%
ABGs: CO2 acts how in the body?
Does what to pH?
CO2 acts as an acid in the body (Opposite!)
• As CO2 incr = incr acid = decr pH (respiratory acidosis)
• As CO2 decr = decr acid = incr pH (respiratory alkalosis)
ABGs: HCO3 acts how in the body?
Does what to pH?
HCO3 acts as a base in the body (SAME!)
• As HCO3 incr = incr base = incr pH (metabolic alkalosis)
• As HCO3 decr = decr base = decr pH (metabolic acidosis)
Normal ABG Values?
pH 7.35-7.45 pO2 80-100 mmHg pCO2 35-45 mmHg HCO3 22-26 mEq SaO2 97-100%
Causes of Respiratory Acidosis
Caused by any process which decr ability of lungs to exchange CO2 for O2.
• Ex. COPD, asthma, heart failure, pneumonia
Causes of Respiratory Alkalosis
Caused by any process which incr respiratory rate
• Ex. fever, anxiety, mechanical overventilation
Causes of Metabolic Acidosis
Caused by any process that incr accumulation of acids or decr amount of bicarbonate
• Ex. diabetic ketoacidosis, renal failure
Causes of Metabolic Alkalosis
Caused by any process that decr acid or incr bicarbonate
• Ex. prolonged vomiting / nasogastric suction
Intermittent Asthma
Daytime Sxs: /= 80% predicted
Mild Persistent Asthma
Daytime Sxs: >2 x wk but not daily
Nocturnal Sxs: > 2 x mo
FEV1 or PEF: >80% predicted
Moderate Persistent Asthma
Daytime Sxs: daily B-agonist use (exacer 2 or more / wk)
Nocturnal Sxs: > 1 x a mo
FEV1 or PEF: >60% to
Severe Persistent Asthma
Daytime Sxs: continual
Nocturnal Sxs: frequent
FEV1 or PEF: = 60% predicted
Asthma: S/S of impending airway failure
- Decreased wheezing or breath sounds
- Fatigue
- Diminished respiratory effort/bradypnea
- Cyanosis
- Inability to speak full word sentences
- Increased accessory muscle use
Diagnostic criteria for Airway Obstruction using spirometry (for Asthma w/u)?
• Airway obstruction = reduced FEV1/FVC (
Diagnostic criteria for “reversibility” using spirometry (for Asthma w/u)?
Reversibility is defined by an increase of >/=12% and 200mL in FEV1 or >/=15% and 200mL in FVC after administration of a
short-acting bronchodilator
Diagnostic eval for asthma (in stable patient).
- Spirometry: looking for both obstruction and reversibility (necessary for Dx)
- bronchoprovacation test (methocholine challenge) if spirometry nondiagnostic and high clinical suspicion.
Diagnostic eval for asthma (in unstable patient).
- Peak Flow (measures trends in asthma control, not used to diagnose asthma).
- O2 Saturation
- ABGs