390 results
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
A-a gradient = PAO2 ... - PaO2 A-a gradient ... /0.8)] - PaO2 Simplified ... Hypoventilation Syndrome ... Hepatopulmonary Syndrome
Platypnea-Orthodeoxia Syndrome on Physical Exam
The case of a patient with a diagnosis of cirrhosis and platypnea-orthodeoxia
Platypnea-Orthodeoxia Syndrome ... platypnea-orthodeoxia syndrome ... to 90% (and in paO2 ... #Orthodeoxia #Syndrome ... PhysicalExam #clinical #video
Hepatopulmonary Syndrome
HPS - Diagnosis:
 1. Patients with liver disease
 2. Alveolar-arterial oxygen gradient (AaP02) >15 mmHg
Hepatopulmonary Syndrome ... Moderate HPS: ≥ 60 PaO2 ... Severe HPS: ≥ 50 PaO2 ... Very severe HPS: PaO2 ... Hepatopulmonary #Syndrome
Berlin Criteria for Acute Respiratory Distress Syndrome (ARDS) 
- Respiratory symptoms must have begun within one
Respiratory Distress Syndrome ... inspired oxygen (PaO2 ... - 200 mm Hg < PaO2 ... - 100 mm Hg < PaO2 ... Respiratory #Distress #Syndrome
Understanding & Treating ARDS - Acute Respiratory Distress Syndrome

•  Timing - within one week of
Respiratory Distress Syndrome ... Impaired Oxygenation PaO2 ... Distress #Acute #Syndrome
Non-Invasive Ventilation (BiPAP) Algorithm - Indications and Contraindications
Indications for NIV:
 • COPD - pH <7.35, pCO2
Ventilation (BiPAP) Algorithm ... COPD - pH <7.35, pCO2 ... VC < 1 even if pCO2 ... RR or daytime pCO2 ... Ventilation #BiPAP #Algorithm
Acid-Base Disorders - Differential Diagnosis Algorithm
Acidemia (pH < 7.35)
 • Metabolic Acidosis (HCO3 < 24mmol/L) CO2
Differential Diagnosis Algorithm ... Respiratory Acidosis (pCO2 ... Respiratory Alkalosis (pCO2 ... Differential #Diagnosis #Algorithm
Causes of Unprovoked Pediatric Seizures -  Epilepsy Syndromes - Differential Diagnosis Algorithm 
Infantile:
 • Benign
Seizures - Epilepsy Syndromes ... Differential Diagnosis Algorithm ... Infancy • West Syndrome ... • Dravet Syndrome ... Differential #Diagnosis #Algorithm
Nephritic vs Nephrotic Syndrome

Step 1: If the patient has hematuria and/or proteinuria, think about nephrotic/nephritic syndromes.
Step
Nephritic vs Nephrotic Syndrome ... nephrotic/nephritic syndromes ... Nephritic #Nephrotic #Syndrome ... #Comparison #Algorithm
Hypokalemia - Differential Diagnosis Algorithm
Extra-renal Losses:
 • Normal Acid-Base: Low intake
 • Metabolic acidosis: Gl tract
Differential Diagnosis Algorithm ... SAME, Cushing Syndrome ... diuretics, Bartter syndrome ... , Gitelman syndrom ... Differential #Diagnosis #Algorithm