Algorithms in Medicine @MatthewHoMD
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Matthew Ho, MD PhD https://twitter.com/MatthewHoMD
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Pulmonary Function Testing (PFT) Interpretation Algorithm

Restrictive Lung Disease:
 • Chest wall or neuromuscular disorders
 • Interstitial
Lung Disease Obstructive ... Emphysematous COPD ... Non-emphysematous COPD ... diagnosis #asthma #COPD
Ascites Differential Diagnosis Table - Serum Ascites Albumin Gradient (SAAG)

SAAG ≥ 1.1:
 • Cirrhosis
 • Portal
Ascites Albumin Gradient ... tamponade • IVC obstruction ... Serum #Albumin #Gradient
Hypoxemia Differential Diagnosis Algorithm by A-a Gradient

Normal A-a Gradient:
 • ↓ Atmospheric pressure
 • Hypoventilation: CNS
Algorithm by A-a Gradient ... Normal A-a Gradient ... compliance ↑ A-a Gradient ... pulmonary #Aa #Gradient
Hypoxemia / Hypoxia - Rapid Response Management Algorithm

Stridor - Upper airway pathology:
 • Anaphylaxis
 • Foreign
Epiglottitis • Vocal cord ... pneumothorax, COPD
Algorithm for Management of Acute Exacerbation of COPD (AECOPD)

Obtain workup for alternate diagnoses and relevant comorbidities:
Exacerbation of COPD ... newly diagnosed COPD ... MatthewHoMD #COPD
Autoimmune Hemolytic Anemia (AIHA) - Differential Diagnosis Table

Warm AIHA (48-70%)
Cold AHA (16-32%)
 • Donath-Landsteiner HA (paroxysmal
AIHA (48-70%) Cold ... HA (paroxysmal cold ... hemoglobinuria) • Cold
Algorithm for Suspected SVC Syndrome

SVC syndrome suspected: Facial/arm/neck edema, distended neck/chest veins, facial plethora, dyspnea, cough,
SVC Syndrome Grading
Stoma Indications, Output and Complications

Stoma Types:
 • End ileostomy
 • Loop ileostomy
 • End colostomy
 •
digestion • Bowel obstruction
Oncology Algorithm for the Management of Suspected Epidural Spinal Cord Compression (ESCC)

Suspected ESCC: Pain, weakness, numbness/paresthesias,
Epidural Spinal Cord ... Epidural #Spinal #Cord