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Laboratory Medicine

Test catalogue

Sickle Cell Screen (Hemoglobin S)

Test Name

Sickle Cell Screen (Hemoglobin S, Sickling Test, Sickledex)

Lavender Tube Specimen Type / Requirements

Container Type = Lavender

Minimum Venous Volume = 1 mL Whole Blood

Capillary - BD microcollection tube; minimum volume 250µL for running neat, although 125 µL is acceptable run as a dilution

Specimen Handling

Collection Instructions: Collect sample in a lavender top and send to core lab. Sample should be well mixed at time of collection to prevent platelet clumping. Write your initials, date and time of collection on the collection label.

Stability: Stable at 1 – 8 °C for up to 6 weeks.

Transportation: Transport at room temperature within 1 hour of collection.

Sample Rejection Criteria: Plasma, clotted sample, Grossly hemolyzed samples, Unlabeled or Not Sufficient Quantity Samples will be rejected.

Required Documentation

Turnaround Time (TAT)

Same Day

Test Utilization

Reference Value


Test Code



Sickle Solubility

Testing Location


Other Information

Last Updated: June 06, 2019