When a medical device is supposed to help you breathe at night, the last thing you expect is that it might make you sick. That is the central claim in thousands of lawsuits over recalled CPAP, BiPAP, and ventilator machines. The devices use foam to reduce noise and vibration. In 2021, Philips Respironics recalled millions of machines because that foam could break down. Patients reported black particles in their masks, tubes, and humidifiers. They also reported headaches, cough, sinus problems, asthma-like symptoms, and cancers. The recall became one of the largest mass torts in recent years.
A mass tort is not a single lawsuit. It is a group of individual claims that share the same basic cause. Each patient has a different injury, medical history, exposure time, and damage. Courts often handle pretrial work together, like evidence gathering and expert testimony, to save time and money. That is different from a class action. In a class action, one or a few people represent everyone with similar claims. Class actions work when the harm is the same for everyone, like a hidden fee on a bank statement. They work poorly when injuries vary widely. CPAP cases vary widely. Some recalled device users have no symptoms. Others have mild irritation. Others have cancer or lung damage. Because of that, CPAP recall claims are usually handled as a mass tort, not a class action.
The key issue is causation. To win, a claimant must show that the recalled foam more likely than not caused the specific injury. That is not automatic. Many people who used CPAP machines have other risk factors for cancer or respiratory disease. They may smoke, work around chemicals, or have a family history. Lawyers fight over medical records, pathology reports, and exposure timelines. They also fight over whether the foam actually released dangerous chemicals at levels high enough to hurt people. Philips has denied that the foam caused serious injury, though it agreed to a recall and later reached a settlement in principle for some claims. The details matter.
Another issue is which machine and when. The recall covered several device families, including certain DreamStation, System One, and A-Series BiPAP models. It also covered some ventilators. Not every device had the same foam or was used for the same amount of time. Some people used a recalled machine for a few months. Others used one for years. Some used a mask with a filter. Others did not. These facts can change the strength and value of a claim. A person with a short exposure and no diagnosis may have a weak claim. A person with long exposure and a specific cancer diagnosis may have a stronger one. No two cases are identical.
Sleep apnea itself matters too. Untreated sleep apnea can cause high blood pressure, heart problems, stroke, and fatigue-related accidents. CPAP therapy is often essential. The recall did not mean every patient should stop treatment. That would have created a different health crisis. Instead, patients were told to talk to their doctors, register their machines, and use the recall process. Many received replacement devices or repair kits. Some switched to other brands. The legal claims are about what happened before the recall and whether the company knew enough to warn people sooner. The central allegation is not that CPAP therapy is bad. It is that a specific foam and a specific corporate response exposed people to avoidable risk.
If you believe you were harmed by a recalled CPAP or BiPAP machine, the first step is to identify the exact model and serial number. Then gather your medical records, especially any diagnosis of cancer, lung disease, or airway problems. Keep the device if you still have it, or document how you returned it. Do not rely on memory alone. The recall notice, proof of purchase, and doctor notes can matter. Deadlines also matter. Mass tort claims often have a time limit called a statute of limitations. That limit varies by state and by injury. Once it passes, you may lose the right to file, no matter how strong your case is.
