15 results
Causes of False Elevation and Reduction in HbA1c

== False Elevation ==
Decreased RBC turnover 
• Iron, B-12,
Causes of False ... Elevation == Decreased ... Hypertriglyceridemia • Uremia High ... blood loss • Hemolytic ... #DM2 #Differential
Hemolytic Anemia - Differential Diagnosis Algorithm
Hereditary:
 • Peripheral blood smear + DAT + further History
 •
- Differential ... further History • Bite ... disease, drugs, transfusions ... #Anemia #Differential ... Diagnosis #Algorithm #causes
Blood Product Transfusions One Pager Summary
Type and screen - determines blood type and detects in recipient
Transfusion Thresholds ... Causes purpura & ... TRALI): Leading cause ... High mortality. ... more likely to cause
Differential Diagnosis for Hemolytic Anemia
Intrinsic Causes:
 • Enzyme deficiencies ex. G6PD, pyruvate kinase 
 • Hemoglobinopathies
Differential Diagnosis ... for Hemolytic Anemia ... , spider/snake bites ... prosthetic valve • Transfusion ... #Anemia #Differential
Causes of HyperKalemia - Differential Diagnosis
Increased extracellular K+:
 • Tissue injury
 • Hemolysis
 • Rhabdomyolysis
 •
- Differential ... Tissue injury • Hemolysis ... glycosides • High ... intake • Blood transfusion ... of injection Decreased
Hyperkalemia - Differential Diagnosis Framework

PseudoHyperkalemia:
 • Lab error
 • Traumatic venipuncture
 • Hemolysis, thrombocytosis, leukocytosis
 •
Hyperkalemia - Differential ... phlebotomy High ... #hyperkalemia #differential ... #diagnosis #causes ... #potassium #high
Hyperkalemia: Diagnostic algorithm
Decreased renal potassium excretion
 • Acute renal failure
 • Chronic renal failure
 • Drugs
Increased
Diagnostic algorithm Decreased ... diet • Blood transfusion ... • Tumor lysis/hemolysis ... Normal, Renin High ... nephrology #potassium #differential
Hyperkalemia - Differential Diagnosis Framework

PseudoHyperkalemia:
 • Lab error
 • Traumatic venipuncture
 • Hemolysis, thrombocytosis, leukocytosis
 •
Hyperkalemia - Differential ... phlebotomy High ... #hyperkalemia #differential ... #diagnosis #causes ... #potassium #high
Several artifacts can cause significant and potentially misleading alterations to measured RBC parameters: 
1. Old samples
falsely high Hgb ... Hemolysis causes ... PCV to decrease ... PCV and MCV to decrease ... Echinocytes #BurrCells #Bite
Causes of Hyperkalemia - Differential Diagnosis Framework
 • Cellular Shift:
   - Exercise
Causes of Hyperkalemia ... - Differential ... Crush injury, Hemolysis ... #Diagnosis #Causes ... #potassium #high