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Calcium, Ionized, post-filter
| Item | Value |
|---|---|
| Test Update Information | Effective March 10, 2008, the volume of blood required for ionized calcium testing in venous blood will increase from approximately 100 microliters to 600 microliters. This will require that an additional full bullet tube sample be drawn on pediatric patients in whom other tests are being ordered in addition to ionized calcium. |
| Approval req'd? | No |
| Available Stat? | Yes |
| Utilization Guidelines | This test should ONLY be ordered when testing post-filter samples in patients on dialysis with citrate anticoagulation. It should not be ordered for monitoring a patient's systemic ionized calcium level. See Calcium, Ionized, serum/plasma (CAI). |
| Test code | PCAI |
| Test group | Calcium |
| Performed by | Parnassus Chemistry |
| In House Availability | Test available 24 hours per day 7 days per week |
| Method | ISE - Nova 8 CRT |
| Collection Instructions | Fill collection container completely. Deliver immediately to lab. Not acceptable as an "add-on" if tube has already been processed for other routine tests |
| Container type | Gold top or Light Green top |
| Amount to Collect | 2 mL blood Click here for Microdetermination info |
| Sample type | Serum or plasma |
| Preferred volume | 1 mL serum or plasma |
| Min. Volume | 0.3 mL serum or plasma Click here for Microdetermination info |
| UCSF Rejection Criteria | Delivered to lab > 30 min after collection |
| Processing notes | Do not centrifuge or open tube. Deliver immediately to Chemistry. Not acceptable as an "add-on" if tube has already been processed for other routine tests |
| Units | mmol/L |
| Normal range | |
| Synonyms | iCa; Free calcium; Calcium, ionized; calcium, free; Ca; Ca++ |
| Turn around times | STAT 1 hour, Routine 3 hours |
| Additional information | NOTE – the results for serum or plasma ionized calcium are adjusted (normalized) to a standard pH of 7.40. To obtain ionized calcium results that are not adjusted to a standard pH of 7.40, order whole blood ionized calcium (e.g., in patients with possible acid-base disturbances including those with symptoms of hypocalcemia suspected to be secondary to respiratory alkalosis). |
| CPT coding | 82330 |
| LOINC code | 1995-0 |
| LDT or Mod FDA? | No |
| Last Updated | 5/22/2013 1:49:26 PM |
| Entry Number | 1456 |
If you have additional questions regarding this test, please call: 415-353-1667