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Test ID: PTSE    
Platinum, Serum

Useful For Suggests clinical disorders or settings where the test may be helpful

Monitoring platinum levels in patients receiving cisplatin or other platinum-containing drugs

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

Cisplatin (cis-diamminedichloroplatinum)(1) and carboplatin (cyclobutanedicarboxylatoplatinum)(2,3) are used in cancer chemotherapy. Clinical trials demonstrate schedule-dependent activity of carboplatin in patients with relapsed and refractory acute leukemia. Patients responding to carboplatin therapy had peak serum platinum concentration in the range of 0.6 to 1.8 mcg/mL. Trough concentrations ranged from 0.1 to 0.4 mcg/mL. Platinum concentrations maintained >1.8 mcg/mL can induce neutropenia and renal failure if coadministered with nephrotoxic antibiotics.(1,2)

 

Unexposed individuals should have platinum concentrations <0.04 mcg/mL.(4)

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

Cisplatin Infusion, Peak: 0.6-1.8 mcg/mL

Cisplatin Infusion, Trough: 0.1-0.4 mcg/mL

Unexposed: <0.04 mcg/mL

Interpretation Provides information to assist in interpretation of the test results

Effective Range:

-Patients responding to carboplatin therapy had peak plasma platinum concentration in the range of 0.6 to 1.8 mcg/mL.

-Trough concentrations range from 0.1 to 0.4 mcg/mL.

-Platinum concentrations maintained >1.8 mcg/mL can induce neutropenia, and renal failure if coadministered with nephrotoxic antibiotics.

-Unexposed patients should have platinum concentrations <0.04 mcg/mL.

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

Platinum concentrations maintained >1.8 mcg/mL can induce neutropenia, and renal failure if co-administered with nephrotoxic antibiotics. The dose-limiting toxicity of carboplatin in leukemia patients was prolonged neutropenia. Other toxicities include renal failure, particularly in the setting of nephrotoxic antibiotics and amphotericin.

 

Interpretation requires knowledge of the time of serum collection relative to dosing. Peak platinum concentration is achieved within 30 minutes of the end of infusion, while the trough platinum concentration occurs just before the next dose.

Clinical Reference Provides recommendations for further in-depth reading of a clinical nature

1. Katano K, Tsujitani S, Oka S, et al: Pharmaocokinetics of hypotonic cisplatin chemotherapy administered into the peritoneal and pleural cavities in experimental model. Anticancer Res 2000;20:1603-1607

2. Kaufmann SJ, Karp JE, Letendre L, et al: Phase I and pharmacologic study of infusional topotecan and Carboplatin in relapsed and refractory acute leukemia. Clin Cancer Res 2005;11:6641-6649

3. Lindauer A, Eickhoff C, Kloft C et al: Population pharmacokinetics of high-dose carboplatin in children and adults. Ther Drug Monit 2010;32:159-168

Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test