About
Jack Walsh, DO
Arthroplasty Surgeon-Scientist
Primary and revision hip and knee replacement
The work
Evidence should help people think—not ask them to surrender judgment.
Jack Walsh is an orthopaedic surgeon-scientist focused on arthroplasty, evidence quality, and decision-making under uncertainty. He founded OrthoScienus to make rigorous appraisal, honest risk communication, and structured learning easier to use in everyday surgical practice.
OrthoScienus is the public home for that work: free instruments, transparent frameworks, selected scholarship, and teaching built around decisions that remain accountable to evidence.
Research interests
- Primary and revision arthroplasty
- Estimation-first clinical research
- Risk communication and shared decisions
- Decision science and surgical calibration
- Systems thinking in clinical practice
Professional values
- Effect sizes before thresholds
- Uncertainty shown, not hidden
- Sources verified, never invented
- Decisions separated from outcomes
Mission