15 results
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Hypoventilation: CNS ... Hypoventilation Syndrome ... Hepatopulmonary Syndrome ... UnremarkableLab #AA ... Hypoxia #hypoxemia #differential
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
BEE Syndromes - Non-inflammatory Causes

Immune-mediated conditions affecting the Brain, Eye, and Ear

Visual or auditory symptoms in
Non-inflammatory Causes ... nervous system (CNS ... Non-inflammatory causes ... • Infiltrating base ... noninflammatory #differential
Acid Base Disorders - Blood Gas Interpretation

Steps for Blood Gas Interpretation: 
1. Acidemia or Alkalemia? 
2.
Acid Base Disorders ... D-lactate (short bowel syndrome ... Classically” noted with pulmonary ... acidosis: - CNS ... bloodgas #Acid #Base
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
Hypertrophic Pachymeningitis - Differential Diagnosis Framework

Pachymeningitis is a rare condition that causes areas of a layer
condition that causes ... different symptoms based ... Neurosyphilis • CNS ... pachymeningitis • CNS ... brain sagging syndrome