Center for Emergency Surgery Outcomes Research

When surgical decisions cannot wait.Evidence for when it is anything but elective.

CESOR connects prospective emergency surgery studies, rigorous methods, and the people who turn shared questions into usable evidence.

Explore the projects Work with CESOR

Multicentre emergency surgery research, designed with collaborators.

01 / Current studies

Four platforms. One collaborative programme.

Active

Acute calculous cholecystitis

International prospective platform study of management pathways and 90-day outcomes.

Open SnapChole

Active

Necrotizing soft tissue infection

Prospective cohort focused on source control, antimicrobial strategy, and 90-day outcomes.

Open SnapNSTI

Active

Mechanical large-bowel obstruction

Snapshot audit of diagnostic, operative, and medium-term stoma pathways.

Open IMPEL

Active

Emergency surgery readiness

European scan of digital, imaging, governance, and implementation capability with a live aggregate dashboard.

Open EGS-READI

02 / Publication record

Peer-reviewed work, arranged by study and method.

03 / People

Gary A. Bass, MD, MSc, MBA, PhD, FEBS (Emergency Surgery)

Assistant Professor of Surgery and Assistant Professor of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania

Gary directs CESOR with collaborators in emergency surgery, biostatistics, causal inference, and implementation science.

International by design.Clinical centres, analysts, and trainees work through defined study and collaboration pathways.

Collaborate

Find a study pathway, contribute from a clinical centre, or submit a focused project idea.