Henoch Schönlein purpura (HSP) is a small-vessel vasculitis characterized by hematuria, purpura, arthritis and abdominal pain. HSP is the most common vasculitis of childhood.
Tests generally appear in the order most useful for common clinical situations
| Test name: CBC with Platelet Count & Automated Differential |
| ARUP #: 0040003 |
| Methodology: Automated Cell Count with Flow Cell Differential |
| Use: Differentiate between infectious and non-infectious process |
| Test name: Sedimentation Rate, Westergren (ESR) |
| ARUP #: 0040325 |
| Methodology: Westergren |
| Use: Assess for inflammation; typically elevated |
| Test name: Urinalysis, Complete |
| ARUP #: 0020350 |
| Methodology: Reflective Photometry/Microscopic by Yellow IRIS |
| Use: Screen for hematuria |
| Test name: Urea Nitrogen, Serum or Plasma |
| ARUP #: 0020023 |
| Methodology: Quantitative Spectrophotometry |
| Use: Screen for glomerulonephritis |
| Test name: Creatinine, Serum or Plasma |
| ARUP #: 0020025 |
| Methodology: Quantitative Enzymatic |
| Use: Screen for glomerulonephritis |
| Test name: Immunoglobulin A |
| ARUP #: 0050340 |
| Methodology: Quantitative Nephelometry |
| Comments: Screen for elevation |