Damgaard v. Avera Health
104 F. Supp. 3d 983
D. Minnesota2015Background
- Medical-malpractice suit alleging Dr. Mary Olson’s negligence during 2010 labor/delivery caused newborn I.L.D. to suffer hypoxic-ischemic encephalopathy, resulting in severe cerebral palsy, seizures, and developmental impairments.
- Plaintiff seeks to hold Dr. Olson liable for lifelong injuries to I.L.D.; case involved multiple retained experts on causation.
- Defendants offered experts who proposed alternative causes (maternal drug use, smoking, genetics, etc.).
- Plaintiff moved to exclude Defendants’ expert testimony under Federal Rule of Evidence 702 and Daubert, arguing opinions were speculative, unsupported by the record, or contradicted by facts.
- Court held a Daubert gatekeeping analysis but emphasized the liberal admissibility standard in the Eighth Circuit and that factual challenges generally go to weight/credibility, not admissibility.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Admissibility of defense experts under Rule 702/Daubert | Experts are speculative, lack factual support (e.g., no proof of prenatal Depakote), and unreliable | Experts offer alternative, plausible causation theories supported by some record evidence and reliable methods | Denied — opinions admissible; concerns go to weight/credibility, not exclusion |
| Reliance on limited or no peer-reviewed studies | Expert opinions unsupported without published studies are unreliable | No requirement that medical experts always cite published studies; reliable methods suffice | Denied — absence of studies is cross-examination fodder, not automatic exclusion |
| Competing expert opinions and qualifications | Plaintiff's experts comprehensively refute defense experts; defense should be excluded | Court should admit competing expert opinions and let jury decide credibility | Denied — court will not weigh competing experts; jury decides credibility |
| Use of potentially weak factual bases (e.g., testimony of father, stray medical-record references) | Such facts are too weak to support opinions (e.g., Depakote use) | Those factual bases exist and support admissibility; challenges go to cross-examination | Denied — factual disputes affect weight, not admissibility |
Key Cases Cited
- Daubert v. Merrell Dow Pharms., 509 U.S. 579 (1993) (sets admissibility standard for expert testimony under Rule 702)
- Robinson v. GEICO Gen. Ins. Co., 447 F.3d 1096 (8th Cir. 2006) (expert testimony admissible if it advances juror understanding to any degree)
- Synergetics, Inc. v. Hurst, 477 F.3d 949 (8th Cir. 2007) (factual basis for expert opinion goes to credibility, not admissibility)
- Kuhn v. Wyeth, Inc., 686 F.3d 618 (8th Cir. 2012) (courts should not determine which of competing scientific theories is superior)
- Johnson v. Mead Johnson & Co., LLC, 754 F.3d 557 (8th Cir. 2014) (district courts admonished not to weigh competing expert opinions when deciding admissibility)
- Bonner v. ISP Techs., Inc., 259 F.3d 924 (8th Cir. 2001) (medical expert need not always cite published studies to reliably conclude causation)