Recycling and Environmental Sustainability in Anesthesia Practice: Beyond Low‑Flow Anesthesia.

Operating rooms generate substantial amounts of solid waste and greenhouse gas emissions from anesthetic agents, yet most "green anesthesia" efforts have focused narrowly on low‑flow volatile delivery rather than on the broader waste stream associated with anesthetic care. A large proportion of anesthesia‑adjacent materials (e.g., blue wrap, intravenous (IV) containers, and packaging) are clean, potentially recyclable items that are frequently misclassified as regulated medical waste, inflating environmental and cost-related impact and disposal costs.​ A narrative review of the literature was conducted using PubMed as the primary database, supplemented by manual citation tracking. Search terms combined concepts such as "operating room waste," "anesthesia waste," "blue wrap," "recycling," "volatile anesthetics," and "low‑flow anesthesia." Studies were included if they reported on the composition of operating room or anesthesia‑related waste, the capacity for recycling perioperative materials, the implementation of recycling or waste‑segregation programs, cost outcomes associated with regulated medical waste, or emission-reduction tactics for inhaled anesthetic emissions; commentaries without primary data were excluded. This approach yielded several dozen relevant observational audits, quality‑improvement reports, implementation case studies, surveys, and life‑cycle analyses published over the past two decades.​ Across waste audits, anesthesiology accounts for roughly one‑quarter of operating room waste, with approximately half to two‑thirds of anesthesia‑related solid waste classified as clean and potentially recyclable plastics and paper products. High‑yield streams include polypropylene (PP) blue wrap, IV fluid containers (high-density polyethylene (HDPE)/PP/polyvinyl chloride (PVC)), rigid plastic basins, flexible plastic packaging, and paper/cardboard, for which targeted recycling programs have achieved substantial diversion with minimal workflow disruption. Multi‑site and single‑center recycling campaigns report large reductions in regulated medical waste volumes, cost avoidance from lower disposal fees, and, in some cases, direct revenue from the sale of recyclables. In parallel, life‑cycle studies of volatile anesthetics demonstrate that desflurane and nitrous oxide contribute disproportionately to the anesthetic carbon footprint, whereas low‑flow delivery, preferential selection of lower‑GWP (global warming potential) agents, reduced nitrous oxide use, and gas capture technologies markedly lower emissions without impairing patient safety. An integrated strategy that couples point‑of‑use recycling of uncontaminated anesthesia‑adjacent materials with standardized low‑flow anesthetic protocols and gas‑mitigation technologies presents a feasible, high‑yield pathway to improve environmental performance and control costs in perioperative care. Departments have to prioritize mapping local recyclability, enhancing waste handling segregation and signage, embedding recycling receptacles into anesthesia workflows, and tracking both diversion and emissions metrics to guide iterative quality improvement.​.