The carbon footprint of single-use endoscopy instruments in Spain

Research highlights

• "This study was a single-centre prospective study conducted at La Fe University Hospital from June 2022 to July 2022."
• "It was designed to evaluate sustainability and composition–environmental impact of commonly used endoscopy instruments (biopsy forceps, polypectomy snares and haemostatic clips) from four different manufacturers, quantifying the parts that could be recycled."
• "Mean carbon footprint was significantly higher in haemostatic clips (0.49 kg CO2-eq range 0.41–0.57) than in snares (0.41 kg CO2-eq, range 0.38–0.44) and forceps (0.41 kg CO2-eq, range 0.31–0.47) (p<0.001)."
• "According to our LCA in terms of environmental impact, GHG emissions reached up to 67.74 kg CO2-eq during our one-week prospective study. By applying our sustainability intervention based on a green mark, we could reduce our environmental impact up to 27.44% (18.26 kg CO2-eq)."

Abstract

GI endoscopy units represent the third largest producers of medical waste. We aimed to determine endoscopic instrument composition and life cycle assessment (LCA) and to assess a sustainability proposal based on a mark on the instruments that identifies parts can be safely recycled or ‘green mark’. Material composition analysis and LCA of forceps, snares and clips from four different manufacturers (A–D) were performed with four different methods. Carbon footprint from production, transportation and end of life of these instruments was calculated. In 30 consecutive procedures, we marked the contact point with the working channel. 5 cm away from that point was considered as green mark. One-week prospective study was conducted with 184 procedures evaluating 143 instruments (75 forceps, 49 snares and 19 haemoclips) to assess the efficacy of this recyclable mark. Composition from different manufacturers varied widely. Most common materials were high global warming potential (GWP) waste (polyethylene, polypropylene and acrylonitrile) and low GWP waste (stainless steel). Significant differences were found for the forceps (0.31–0.47 kg of CO2 equivalent (CO2-eq)) and haemoclips (0.41–0.57 kg CO2-eq) between the manufacturers. Green mark was established 131.26 cm for gastroscope and 195.32 cm for colonoscope. One-week activity produced 67.74 kg CO2-eq. Applying our sustainability intervention, we could reduce up to 27.44% (18.26 kg CO2-eq). This allows the recycling of 61.7% of the instrument total weight (4.69 kg). Knowledge of carbon footprint is crucial to select the most sustainable alternatives because there are large variations between brands. A mark to identify recyclable parts could reduce our environmental impact significantly.

Methods & Results

For a complete summary of this data source and to see reported environmental impact values for studied products and activities, explore the HealthcareLCA Database.

Citation

López-Muñoz P, Martín-Cabezuelo R, Lorenzo-Zúñiga V, Vilariño-Feltrer G, Tort-Ausina I, Vidaurre A, Beltran VP. Life cycle assessment of routinely used endoscopic instruments and simple intervention to reduce our environmental impact. Gut. 2023 Apr 26