Streamlining surgical instrument counting: a matrixed multiple case study on the fidelity of weighing systems in the operating room

20 years after implementation, there is varying success concerning the fidelity of weighing systems for surgical instrument counting. All participating hospitals have adapted their workflow to the limitations of the technology in different ways. Given the relative straight-forwardness of weighing scales as a technology, our findings underline the complexity of implementation processes, regardless of the complexity of the innovation.