First surgical device for measuring valve leakage during heart surgery

A quick, simple test in the operating room, so leaky valves can be fixed before the heart is restarted.

Partners and supporters

  • BRIDGE
  • ARTORG Center for Biomedical Engineering Research, University of Bern
  • Inselspital, Bern University Hospital
  • Venture Kick
  • Gebert Rüf Stiftung

About us

TightValve is a start-up from the ARTORG Center for Biomedical Engineering Research (University of Bern), and we are developing a novel device for measuring aortic valve leakage during surgery. It will give surgeons a clear answer to the question of whether the valve is tight while there is still time to correct it, before the heart is restarted and the patient is disconnected from cardiopulmonary bypass.

Our team

  • Silje Ekroll Jahren

    Silje Ekroll Jahren

  • Emmanuel Zimmer

    Emmanuel Zimmer

  • Dominik Obrist

    Dominik Obrist

  • Philip Kehl

    Philip Kehl

  • Pascal Buchs

    Pascal Buchs

News

February 2026

TightValve awarded GRS InnoBooster

On 27 February 2026, TightValve was awarded the InnoBooster of the Gebert Rüf Stiftung (GRS), a grant that runs from April 2026 to March 2027. This support is an important step in our mission to bring our device to the operating room and to help surgeons give their patients the best possible care.

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August & October 2025

Venture Kick Stage 1 & 2 wins

In August 2025 (Stage 1) and October 2025 (Stage 2), we won the first two stages of the start-up competition Venture Kick, organised by the charitable Kick Foundation, supported by a private consortium and operated by Venturelab.

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Hauptstadt.be article

August 2025

Article in Hauptstadt.be: “Startup ohne Gründer” (A start-up without its founder)

The newspaper Hauptstadt.be has written about Pascal Buchs and TightValve’s difficult journey after Pascal’s tragic accident on 27 December 2024.

Read the article
Pascal Buchs

January 2025

In memory of Pascal Buchs

In light of the tragic accident on 27 December 2024, we have written some words that we would like to share with you. 🤍🕊️

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August 2024

BRIDGE Proof of Concept grant

In August 2024, we received a one-year grant from the BRIDGE Proof of Concept programme. This marked the beginning of the development of our project. The goal is to validate our device in the first patients.

About BRIDGE

June 2024

Stage-Up win

In June 2024, we won the start-up competition Stage-Up, organised by the Entrepreneurship Center of the University of Bern.

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