This tidal volume target (in mL/kg of ideal body weight) is the strongly recommended lung-protective strategy for adults with ARDS.
What is 6ml/kg IBW?
Per ERS/ATS interpretive standards, an obstructive ventilatory impairment is defined by this ratio falling below the lower limit of normal
What is FeV1/FVC ratio?
On a normal, fully aerated lung, these repeating horizontal reverberation artifacts appear at equal intervals below a sliding pleural line. 
What are Alines?
This is the diagnosis for an immunologic pulmonary disorder caused by hypersensitivity to Aspergillus fumigatus, classically seen most in patients with chronic asthma or cystic fibrosis. Common associated findings are fleeting infiltrates on CXR, skin testing positive for Aspergillus fumigatus, eosinophilia >500/microL, IgE >417 IU/mL.
What is ABPA?
This upper-limit plateau pressure goal (in cm H2O) is strongly recommended in sepsis-associated ARDS
What is 30 or less?
GOLD and COPD guidelines use this fixed FEV1/FVC cutoff to define obstruction, contrasting with the LLN-based ERS/ATS approach
What is 0.7?
On M-mode, the normal "seashore sign" is replaced by the "barcode" or "stratosphere sign," and real-time imaging shows absent lung sliding — findings that raise suspicion for this diagnosis

What is Pneumothorax?
This is the cutoff, either in A-a gradient or arterial PO2, for glucocorticoid addition in the treatment of P. jirovecii pneumonia.
What is an A-a >/= 35mmHg OR arterial PO2 <70mmHg? (In addition to high-dose TMP-SMX)
For moderate-to-severe ARDS, prone positioning is suggested for at least this many hours per day
What is greater than 12 hours daily?
A reduced IVC of <80% of VC during the DLCO could mean the actual value might be this.
What is underestimated? Or higher
This or more of these discrete vertical, laser-like hyperechoic artifacts arising from the pleura in one intercostal space define the interstitial syndrome (e.g., pulmonary edema, ARDS).

What is 3?
Per the 2016 IDSA/ATS guideline, this single risk factor — carrying an odds ratio of roughly 12 for multidrug-resistant VAP — is the strongest predictor and, when present, mandates empiric coverage for MRSA plus two antipseudomonal agents.
What is iv antibiotics within last 90 days?
The landmark ROSE trial changed practice by showing continuous infusion of this drug class did not improve mortality vs a light-sedation, as-needed-bolus strategy in moderate-severe ARDS.
What is NMB?
(the SSC now suggests intermittent boluses over continuous infusion)
This flow volume loop abnormality is expected in a patient with vocal cord dysfunction.
What is flattening of the inspiratory limb?
Variable extrathoracic obstruction->Variable extrathoracic obstruction (e.g., vocal cord dysfunction, extrathoracic tracheal/laryngeal lesion.
This single real-time finding — the transition point between sliding and absent-sliding lung — is pathognomonic (invariably confirms) a pneumothorax.

What is lung point?
In a neutropenic patient with hematologic malignancy, this angioinvasive mold produces nodules with a surrounding "halo sign," later evolving to an "air-crescent sign" during count recovery.

What is Invasive Pulmonary Aspergillosis?
When using higher PEEP in moderate-severe ARDS, the SSC strongly recommends AGAINST this specific PEEP-setting maneuver
What is PEEP titration strategy?
A reduced FeV1 and FVC with a normal FEV1/FVC and a normal TLC is termed this pattern, which may reflect either obstructive or restrictive disease
What is PRiSM or non-specific pattern?
An IVC ≤2.1 cm that collapses >50% is inconsistent with volume overload and suggests a normal right atrial pressure of roughly this range (mm Hg)?
What is 0-5?
This is the three-drug regimen and its duration of therapy indicated for a patient with 5 months of worsening cough with 10-lb weight loss, fatigue and decreased appetite, who has two separate sputum cultures growing Mycobacterium avium complex.
What is the combination of a macrolide (ie, clarithromycin, azithromycin), ethambutol, and a rifamycin (ie, rifampin, rifabutin)? Treatment duration of at least one year?