520 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 #
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
Myasthenia Gravis
Signs, Symptoms and Testing - Likelihood Ratios
Does this patient have myasthenia gravis?
JAMA. 2005 Apr 20;293(15):1906-14.
speaking - Sleep Test ... - Ice Test - ... Rest Test - Anticholinesterase ... Test - Quiver ... LikelihoodRatios #PhysicalExam
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
Knee Examination
Right Knee - Examination maneuvers include the Lachman (ACL), anterior drawer (ACL), Lateral pivot shift,
meniscal integrity) tests ... #Sports #Knee #PhysicalExam ... McMurray #Drawer #Test
Freiberg's Test for Piriformis Syndrome

Flex the hip to 90 degrees, internally rotate the hip.
Pain in the
Freiberg's Test ... for Piriformis Syndrome ... #Piriformis #syndrome ... #Freibergs #Test ... clinical #video #physicalexam
Glomerular Diseases - Nephritic and Nephrotic Syndromes

Nephritic syndrome:
 - Acute poststreptococcal 
glomerulonephritis 
 - Rapidly progressive
and Nephrotic Syndromes ... Nephritic syndrome ... Nephrotic syndrome ... Nephritic #Nephrotic #Syndromes ... GrepMed Recommended Text
Understanding & Treating ARDS - Acute Respiratory Distress Syndrome

•  Timing - within one week of
Respiratory Distress Syndrome ... Impaired Oxygenation PaO2 ... Distress #Acute #Syndrome
Shoulder Exam - Provocative Testing

Supraspinatus muscle injury:
 - Jobe’s Test
 - Hawkin’s Test
 - Drop Arm
injury: - Jobe’s Test ... - Hawkin’s Test ... - Drop Arm Test ... - O’Brien Test ... #Diagnosis #PhysicalExam