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3M Co. & Arizant Health Care, Inc. v. Amador   (U.S. Supreme Court)

Eighth Circuit Erred by Applying Erroneous Standard to Plaintiffs' General Causation Experts

The NAM filed an amicus brief urging the U.S. Supreme Court to review and reverse a deeply flawed Eighth Circuit opinion applying an erroneous standard to the admissibility of expert testimony and usurping the gatekeeping role of the trial court. This multidistrict litigation involves allegations that 3M’s Bair Hugger patient warming device causes surgical site infections. After conducting a thoughtful and thorough review of plaintiffs’ general causation experts’ opinions—a faithful application of Fed. Rule of Evidence 702—the district court found that the opinions included large analytical gaps and were not generally accepted, and, accordingly, granted summary judgment in favor of 3M.

The Eighth Circuit reversed, applying a pre-Daubert standard. Under that standard, it is an abuse of discretion to exclude expert testimony unless the experts’ opinions are “so fundamentally unsupported” that they’re of no help to a jury. This obsolete standard essentially abrogates any discretion a district court has to exclude expert testimony.

The NAM filed an amicus brief urging the Court to grant 3M’s cert petition to resolve the widespread confusion in the courts on applying Rule 702 and safeguard the scientific underpinnings of the American health care system. The Eighth Circuit’s liberal admissibility standard threatens to adversely affect those who rely on the benefits of a medical device or drug—approximately 50,000 people per day. Such critical products, which are subject to substantial scientific analysis and review by the federal government, should not be deemed defective by juries applying an erroneous, overly permissive admissibility standard.

Unfortunately, on May 16, 2022, the Supreme Court denied cert.


Related Documents:
NAM brief  (March 11, 2022)