Bair Hugger lawsuit claims allege that 3M's forced-air surgical warming device spread bacteria and caused deep joint infections after orthopedic implant surgery. Federal cases are coordinated in MDL 2666 in Minnesota, which listed 8,414 pending actions on November 2, 2026. No global settlement has been disclosed, and in September 2026 the court ordered briefing on a Lone Pine order.
Updates on Bair Hugger Lawsuit
How we sourced this page If you developed a serious infection following orthopedic surgery — such as a hip or knee replacement — and a Bair Hugger forced-air warming device was used in the operating room, you may have grounds for a [...]
Understand what is a bear hugger in medical terms. Learn its role in surgery, benefits, and the controversy surrounding infection risks.
Key facts (as of November 2026)
- Dec. 2015: The JPML centralized federal Bair Hugger cases in the District of Minnesota.
- Aug. 16, 2021: The Eighth Circuit reversed the exclusion of plaintiffs' general-causation experts and the MDL-wide summary judgment for 3M.
- June 30, 2026: Solventum reported 3M as a defendant in about 8,400 U.S. lawsuits, plus eight state-court injury cases.
- Sept. 11, 2026: The court ordered expedited briefing on whether to issue a Lone Pine order, with the final brief due Oct. 23, 2026.
- Nov. 2, 2026: MDL 2666 listed 8,414 pending actions, out of 10,836 filed.
What the Bair Hugger lawsuits claim
The Eighth Circuit describes the Bair Hugger as a forced-air device used to keep patients warm during surgery: a heating unit blows warm air through a hose into a perforated blanket over the patient. Plaintiffs allege they developed periprosthetic joint infections after orthopedic implant surgery, either because waste heat created air currents that carried bacteria to the surgical site or because the unit itself was internally contaminated. CDC defines a surgical site infection as an infection in the part of the body where surgery took place, which can include implanted material such as a hip replacement.
Where the litigation stands
MDL 2666 is before Senior Judge Joan N. Ericksen. In 2019 the court excluded plaintiffs' general-causation experts and granted summary judgment to 3M; on August 16, 2021, the Eighth Circuit reversed both rulings, reviving the docket. Solventum, which has agreed to indemnify 3M for uninsured Bair Hugger liabilities, reported for the quarter ended June 30, 2026 that the parties are actively litigating several MDL bellwether and state-court cases and that it increased its litigation accrual, without disclosing an amount. On September 11, 2026, the court ordered expedited briefing on whether to impose a Lone Pine order, and in October 2026 it dismissed several individual cases with prejudice on procedural grounds.
Who may qualify
Claims generally depend on records showing a Bair Hugger was used during an orthopedic implant surgery, a later diagnosis of a deep or periprosthetic joint infection, and medical records that link the timeline. If the court issues a Lone Pine order, plaintiffs may need to produce supporting evidence, such as expert opinions, earlier than usual.
Deadlines and next steps
Statutes of limitations vary by state and often run from the infection diagnosis or its discovery. MDL procedural deadlines matter too: on October 6, 2026, the court dismissed three cases with prejudice because no substitution motion was filed after a plaintiff's death. See Bair Hugger settlement amounts and the Bair Hugger settlement calculator.
Frequently asked questions
Is there a Bair Hugger settlement?
No global settlement has been disclosed. Solventum's filing for the quarter ended June 30, 2026 describes active litigation in MDL bellwether and state-court cases and an increased litigation accrual, but no settlement program, fund or payout schedule. Without a disclosed program, there is no official per-claimant figure for Bair Hugger infection claims.
What is a Lone Pine order?
A Lone Pine order is a case-management tool that requires each plaintiff to produce basic proof, often including expert support for causation, by a set deadline or risk dismissal. On September 11, 2026, Judge Ericksen accepted a magistrate judge's recommendation and ordered expedited briefing on whether to issue one in MDL 2666, with briefs due October 2, October 16 and October 23, 2026.
Who pays if 3M is found liable?
Solventum, the health-care company spun off from 3M, has agreed to indemnify 3M for uninsured liabilities related to the Bair Hugger system and manages the litigation, according to its quarterly filing for the period ended June 30, 2026. 3M remains the named defendant in about 8,400 U.S. lawsuits.
Sources
- JPML – Pending MDL Dockets by Actions Pending (November 2, 2026)
- U.S. Court of Appeals, 8th Cir. – In re Bair Hugger (Amador v. 3M), No. 19-2899 (Aug. 16, 2021)
- D. Minn. – Order on Lone Pine briefing, MDL 2666 (Sept. 11, 2026)
- D. Minn. – Order dismissing cases for failure to substitute, MDL 2666 (Oct. 6, 2026)
- SEC – Solventum Form 10-Q, quarter ended June 30, 2026, commitments and contingencies
- CDC – About surgical site infections
Your deadline runs even while an MDL is pending
Joining a mass tort still requires filing your own case on time. State statutes of limitations usually keep running while bellwether trials and settlement talks go on.
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