The Next Best Step Vignettes (USMLE Step 2 CK) with complete solution

The Next Best Step Vignettes (USMLE Step 2 CK) with complete solution compare to previous chest x-ray - when you find a pulmonary nodule on chest x-ray Pulmonary angiogram (gold standard), but usually used in CT pulmonary angiography or CT with contrast - most accurate test in PE NO LIP Nitrates Oxygen Loops Ionotropic drugs (dobutamine) Positioning (blood pools in the legs) BNP > 400 - tx acute CHF V/Q scan - if the patient cannot have CT angio then what imaging do you use to dx the PE CT chest/abdomen/pelvis and PET to look for mets -next best step after finding a brain tumor on MRI pleural:serum protein > 0.5 pleural:serum LDH > 0.6 pleural LDH > 2/3 serum LDH - Light's criteria for pleural effusion LABA's - what type of asthma treatment should never be used alone 1. clinical scenario - unable to count to 10, use of accessory muscles, etc 2. O2 < 50 3. CO2 > 50 * rule of 50's* - when should you intubate histoplasmosis - ohio missipi cocciodes - southwest US