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Laboratory Test Directory

Sedimentation Rate, iSED


Name Method Department Units
Sedimentation Rate Photometrical Hemorheology
Core Lab, Hematology mm/h

Specimen Requirements

Whole blood

Container Type Container Size Specimen Volume

Purple tube (EDTA)

3 mL 1 mL

Room temperature - 4 hour(s)
Refrigerated - 24 hour(s)

Specimen Preparation

  • If delay in transport is greater than 4 hours, refrigerate
  • Do not centrifuge

Reasons for Rejection

  • Clotted EDTA
  • Delayed or improper handling
  • Capillary specimen
  • Not received within specified time frame
  • Gross hemolysis
  • Over or under filled tube
  • Sample collected in microtainer
  • Tube size larger/smaller than what is listed as acceptable
  • Tube/container size other than what is listed as acceptable
  • See comments for specific specimen rejection(s)


May be combined with CBC collection in 3mL tube. Microtainers and 6mL (13x100) tubes are not acceptable for SED and will be rejected.

CPT Code

  • 85652