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?
Approximate percentage of patients on high-intensity asthma Rx (GINA 4/5) who do not have optimal medication intake (adherence and/or technique)
What is 80%
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)
On their way home from Oktoberfest in 2012, a bunch of critical care physicians drove north on the Autobahn to establish some new criteria for a common critical care diagnosis… name the city, diagnosis, and the 4 criteria
What is the Berlin Criteria?
Criteria
–1. precipitating factor and not exclusively due to cardiogenic edema
–Resp failure within 1 week of onset
–Bilateral opacities, not explained by effusions, atelectasis, or nodules
–Hypoxemia criteria: P:F and S:F ratios
•Intubated: mild – 200-300 or 235-315, moderate – 100-200 or 235-148, severe <100 or <148
•Non-intubated: <300 or <315 with HFNC 30+l/min or PAP with at least 5 cm H2O PEEP
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
Described in 1996, this regional pattern of right-ventricular dysfunction — akinesia or hypokinesis of the mid-free wall with preserved, even hypercontractile, apical motion — is roughly 96% specific but only ~16% sensitive for acute PE; its great mimic is RV infarction, which is excluded by looking for accompanying signs of acute pressure overload
What is McConnell’s Sign?

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?
Your pathologist ordered an electron microscopy on your patient. This is called____
What are Birbeck’s granules?
PLCH
Amato's 2015 mediation analysis identified this ventilator variable rather than tidal volume or PEEP alone, as the parameter most strongly associated with survival in ARDS
What is Driving pressure?
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?
Diagnosis?
What is tracheobronchopathia osteochondroplastica?
This single parameter integrates tidal volume, driving pressure, respiratory rate, flow, and PEEP as the total energy transferred to the respiratory system per minute
What is mechanical power (of ventilation)?

Normally about 0.85–0.90 in adults, a value of this ratio — single-breath alveolar volume compared to plethysmographic total lung capacity — well below that range signals maldistribution of test gas and warns that a 'low' DLCO may be spurious
What is VA/TLC ratio?
When lung sliding is absent, this subtle rhythmic vibration of the pleural line — transmitted from the beating heart instantly excludes pneumothorax at that spot; its sudden appearance in a freshly intubated patient with a silent left hemithorax points not to a dropped lung but to a mainstem intubation

What is lung pulse?
A patient presents with chronic myalgias, diarrhea, and pleural/pericardial effusions. Small bowel biopsy shown.

What is Whipple’s Disease?
A patient with sinusitis, bronchiectasis, and recurrent pleural effusions.

What is Yellow Nail syndrome?