Medical device maker Philips is recalling sleep apnea machines and ventilators containing foam that could put users at risk of cancer or other health issues.

The Dutch company announced a U.S. recall for millions of units of the Philips Bi-Level Positive Airway Pressure (Bi-Level PAP), Continuous Positive Airway Pressure (CPAP), and mechanical ventilator devices. Most of them are DreamStation products.

The defect is related to the polyester-based polyurethane (PE-PUR) sound abatement foam in the devices. The foam can degrade and cause harmful effects when cleaned in the wrong way or when exposed to high heat and humidity. 

Philips said there have been no reports of deaths, but it acknowledged the potential risks of particulate exposure include "headache, irritation, inflammation, respiratory issues and possible toxic and carcinogenic effects."

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