Global health is one of the most pressing issues facing the 21st century. Surgery is a resource and energyintensive healthcare activity which produces overwhelming quantities of waste. Using the 5Rs (Reduce, Reuse, Recycle, Rethink, and Research) provides the global surgical community with the pillars of sustainability to develop strategies that are scalable and transferable in both low and middle-income countries and their high-income counterparts.Reducing energy consumption is necessary to achieving net zero emissions in the provision of essential healthcare. Simple, easily transferrable, high-income country (HIC) technologies can greatly reduce energy demands in low-income countries. Reusing appropriately sterilized equipment and reprocessing surgical devices leads to a reduction of costs and a significant reduction of unnecessary potentially hazardous waste. Recycling through official government-facilitated means reduces 'informal recycling' schemes, and the spread of communicable diseases whilst expectantly reducing the release of carcinogens and atmospheric greenhouse gases. Rethinking local surgical innovation and providing an ecosystem that is both ethical and sustainable, is not only beneficial from a medical perspective but allows local financial investment and feeds back into local economies. Finally, research output from low-income countries is minimal compared to the global academic output. Research from low and middle-income countries must equal research from highincome countries, thereby producing fruitful partnerships. With adequate international collaboration and awareness of the lack of necessary surgical interventions in low and middle-income countries (LMICs), global surgery has the potential to reduce the impact of surgical practice on the environment, without compromising patient safety or quality of care.

Quantifying the academic impact of hand surgery units can serve as a useful parameter for clinicians interested in academia when applying for fellowships or consultant posts. The aim of this study is to measure and rank the academic impact of hand surgery units across the United Kingdom (UK) using bibliometric analysis. UK hand surgery units were identified from the British Society for Surgery of the Hand (BSSH) website and additional manual internet searches. Predefined search strings were used to identify papers about or relating to hand surgery. Using the Clarivate Analytics Web of Science bibliometric analysis tool, cumulative (1900-2021), 10-year (2011-2021), and 3-year (2018-2021) research output data was collected from UK hand surgery units and ranked using the following parameters: number of papers (Np), number of citations (Nc), and the h-index (a metric evaluating the cumulative impact of academic output). The top three units according to the 10-year h-index were The Pulvertaft Hand Centre (15), John Radcliffe Hospital (10), and Norfolk and Norwich University Hospital (10). The units with the greatest number of papers published in the last 10 years were the Pulvertaft Hand Centre (70), Chelsea & Westminster Hospitals (45), and Broomfield Hospital (44). The units with the single most cited papers were Wrightington Hospital (189), the Pulvertaft Hand Centre (152), and St John's Hospital & Royal Hospital for Sick Children (152). The academic impact of hand surgery units varies greatly across the UK. Hand surgery units with a historically strong academic record have generally maintained a similar high output of research over the last decade. The 10-year h-index of hand surgery units can be particularly useful for hand surgeons with a strong academic interest.