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Fetal Cells, Quantitative
| Item | Value |
|---|---|
| Approval req'd? | Yes, contact Hematology x3-1747. If requesting testing on adult females of child-bearing age. |
| Available Stat? | No |
| Test code | FETC |
| Performed by | Parnassus Hematology |
| In House Availability | Test run 0800-1500 Monday-Friday |
| Method | Modified Acid Elution as described by Kleihauer-Betke and modified by Clayton. |
| Collection Instructions | Complete appropriate requisition and request "Fetal cells, Quantitative" |
| Container type | Lavender top, CSF tube |
| Amount to Collect | 1 mL blood |
| Sample type | EDTA whole blood, Body Fluid, CSF |
| Preferred volume | 1 mL blood, Body fluid or CSF |
| Processing notes | If test cannot be performed immediately refrigerate sample. |
| Normal range | See Additional Information |
| Synonyms | Kleihauer-Betke Test; Acid elution test; Alkali Denaturation; Betke test; fetal RBC's; Kleihauer test |
| Stability | Blood refrigerated 48 hours. CSF and Body fluids refrigerated 4-6 hours. |
| Turn around times | Same day or next weekday. |
| Additional information | Testing for a feto-maternal bleed will NOT be done in the case of an Rh+ infant born to an Rh- mother if the more sensitive Fetal Bleed Screen (rosetting test) run by the Blood Bank is negative. Other anticoagulants or clotted blood may be used if necessary. A blood sample must be submitted at the same time and tested in parallel with CSF or BF. Each specimen examined is charged separately. References: Brecher M, ed. Technical Manual, 15th ed. Bethesda, Maryland: American Association of Blood Banks, 2005. Petrides, M. Practical Guide to Transfusion Medicine, 2nd. Bethesda, Maryland: AABB Press, 2007 |
| CPT coding | 85460 |
| LOINC code | 48556-5 |
| Last Updated | 3/7/2011 9:37:21 AM |
| Entry Number | 379 |
If you have additional questions regarding this test, please call: 415-353-1667