Received: 12 February 2020
Accepted: 21 May 2020
First Online: 17 June 2020
Ethics approval and consent to participate
: No additional patient contact was required, and as such, this project was performed as a service evaluation without the need for formal ethical approval. The project was registered with the institutions audit department (Newcastle Hospitals NHS Foundation Trust, Project Record Number 3290) and was conducted in accordance with the Declaration of Helsinki and the guidelines for good clinical practice.
: Only anonymous data were analysed and used in this study, in accordance with the audit department at the study centre.
: David Weir is an educational lecturer for Stryker. Jim Holland is an educational lecturer for Zimmer. The other authors declare that they have no competing interests.