Abstract
Intravitreal injections are one of the most commonly performed procedures in ophthalmology. It is estimated that over 1 million intravitreal injections are performed in Germany annually. The aim of this study was to quantify the waste and carbon footprint associated with single-use injection sets, and to establish a waste reduction strategy. The clinical waste and associated carbon footprint from standard disposable injection sets used by tertiary referral centres in Germany (n = 6) and the United Kingdom (n = 2) were assessed. The safety of performing intravitreal injections with a minimalistic material-sparing approach was evaluated. The average weight of an injection set (and hence the waste generated from each injection) was 165 g. On average, each injection set comprised 145 g (88%) of plastic, 2.1 g (1.3%) of metal, 4.3 g (2.6%) of paper), and 12.9 g (7.8%) of gauze/swabs. For 1 million injections, this equates to 145.2 tonnes (t) of plastic, 2.1 t of metal, 4.3 t of paper, and 12.9 t of gauze/swabs. A material-sparing approach can reduce injection set-associated waste by 99% without necessarily compromising safety. A resource-saving approach to intravitreal injections can minimise the generation of clinical waste and its associated carbon footprint, thereby supporting sustainability.
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