The object
James McEwen invented the first microprocessor-controlled automatic surgical-tourniquet system. Microprocessor control made surgical-tourniquet pressure more precisely managed during operations, turning a simple cuff into a safety-critical medical device used in operating rooms. The change also gave surgical teams clearer control during prolonged procedures.
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What James did
Invented the first microprocessor-controlled automatic surgical-tourniquet system.
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Why it matters
Microprocessor tourniquets improved a safety-critical surgical device used internationally.
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Living-status check
NIHF's official profile says McEwen continues to research tourniquet technology after founding Delfi Medical Innovations. Current institutional evidence in 2026.