What the Lawsuits Allege
The Bair Hugger, made by 3M, is a forced-air warming blanket widely used to keep patients warm during surgery. Lawsuits allege that in joint-replacement operations, the device’s warm airflow can pick up bacteria from the operating-room floor and circulate it up into the open surgical site, contributing to deep-joint infections that can require the implant to be removed and replaced. Plaintiffs point to research, including the McGovern study, that they say links the device to elevated infection risk.
3M disputes this and argues the science does not show the device causes infection — the central, contested question of the litigation.
The MDL Status
The federal cases are consolidated in multidistrict litigation (MDL 2666) in the District of Minnesota, with roughly 8,400 cases pending. The litigation had a notable procedural swing: a trial judge granted 3M summary judgment on expert-evidence grounds, but the Eighth Circuit reversed and revived the cases, and the Supreme Court declined to intervene. Bellwether trials have been in preparation, with no global settlement reached and no finding of liability.
Because causation turns on contested science about airflow and contamination, expert rulings drive this case more than most.
What Patients Should Know
Anyone who developed a deep-joint infection after a hip or knee replacement in which a forced-air warmer was used may have a potential claim, but the evidence is the surgical and infection records tying the two together. This is legal-news coverage, not medical advice. There is no settlement fund yet, so treat “sign up” sites as lead capture.
Before You Act
Thinking About Filing a Claim?
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Bair Hugger Lawsuit: The Surgical-Infection Claims: Frequently Asked Questions
Answers to the most common questions about this case and your legal options.
What is the Bair Hugger lawsuit about?
Allegations that 3M's Bair Hugger forced-air surgical warming blanket can circulate bacteria into joint-replacement wounds, causing deep infections. 3M denies the device causes infection.
Is there a Bair Hugger settlement?
No. The cases are in an active MDL (MDL 2666) with no global settlement and no finding of liability. Bellwether trials have been in preparation.
Who might have a claim?
Patients who developed a deep-joint infection after a hip or knee replacement where a forced-air warmer was used, supported by surgical and infection records.
Legal Disclaimer
This article is general legal information, not legal advice, and does not create an attorney-client relationship. Case status, eligibility criteria, and any amounts described are as reported at the date shown and may change. Consult a licensed attorney in your jurisdiction about your own situation.