14 results
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Hypoventilation: CNS ... Hypoventilation Syndrome ... : Atelectasis, ARDS ... UnremarkableLab #AA ... Hypoxia #hypoxemia #differential
Causes of Sudden Unexpected Death in Infancy (SUDI) - Differential Diagnosis Algorithm
Congenital Anomaly / Disorder:
 •
Causes of Sudden ... Infancy (SUDI) - Differential ... Neurologic Anomaly • Pulmonary ... Sudden Infant Death Syndrome ... #Peds #Pediatrics
Hyponatremia - Differential Diagnosis Algorithm
Hypovolemic - Give volume
Hypervolemic (Edematous) - Look for and treat underlying cause
Hyponatremia - Differential ... treat underlying cause ... cirrhosis, nephrotic syndrome ... Pulmonary Diseases ... , CNS Disease, Meds
Short Stature - Differential Diagnosis Algorithm
Normal Variant, Normal Puberty Onset (BA = CA)
 • Familial Short
Short Stature - Differential ... Anorexia Nervosa • CNS ... #ShortStature #Differential ... endocrinology #causes ... #pediatrics
Hyponatremia - Differential Diagnosis by Mechanism
Decr Blood Pressure (“Decr Effective Circulating Volume”) 
 - Volume depletion
Hyponatremia - Differential ... - Cirrhosis Syndrome ... the lung) - CNS ... hemorrhage) - Pulmonary ... Diagnosis #Table #Causes
Guillain–Barré syndrome (GBS)
(aka: Landry–Guillain–Barré–Strohl syndrome:
	Most common cause of acute flaccid paralysis
	Rapidly progressive ascending paralysis & areflexia
	Autonomic
Guillain–Barré syndrome ...  Most common cause ... Differential diagnosis ... Multiple Sclerosis: CNS ...  Transverse myelitis
Adie's Pupil
What? Unknown nature & benign
 • Regular and mildly dilated pupil (4-6mm);
 • Light-near dissociaton;
Holmes-Adie Syndrome ... Young females Differential ... Diagnosis: • CN ... dissociation • Other causes ... #Adies #Pupil #PhysicalExam
Sjogren's Syndrome Overview

Epidemiology:
• F > M: 9:1
• 5-6th Decades (can be any age)

Autoimmune exocrinopathy multisystemic disease
Hypocomplementemia • Can cause ... Parotid swelling CNS ... nervous system (CNS ... peripheral neuropathy, transverse ... • 8%-27% for CNS
Acid Base Disorders - Blood Gas Interpretation

Steps for Blood Gas Interpretation: 
1. Acidemia or Alkalemia? 
2.
Differentials? ... D-lactate (short bowel syndrome ... Classically” noted with pulmonary ... acidosis: - CNS ... Base #Gas #VBG #differential
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
Infections in HIV - Differential ... Pneumonia: • 3 syndromes ... Lymphadenopathy, CNS ... Infections #HIV #AIDS ... #pulmonary #differential