FDA Continues Warning About Magellan Diagnostics Test

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FDA says that based on studies conducted by Becton Dickinson (BD), it continues to recommend that Magellan Diagnostics lead tests not be used with blood samples taken from the vein. A statement by CDRH Office of In Vitro Diagnostics and Radiological Health acting director Donald St. Pierre says that Magellan’s lead test systems can continued to be used with blood samples from a finger or heel stick.

The agency first warned in 5/2017 that the Magellan tests may provide inaccurate results for some children and adults in the U.S.

At FDA’s request, BD, which manufactures certain blood sample collection tubes often used with many lead tests, studied the accuracy of Magellan’s LeadCare testing systems when used with vein blood collected into BD tubes. The statement says the tests showed there was a significant chance of false results with Magellan’s LeadCare tests when used with whole blood collected from the vein and stored in certain BD tubes.

“Upon further investigation,” St. Pierre says, “BD determined that the affected tubes’ rubber stoppers contain a chemical called thiuram that can release sulfur-containing gases that dissolve into blood samples and bind tightly to lead particles. This chemical reaction makes it difficult for the Magellan lead tests to detect the correct amount of lead in a sample.”

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