Anesthesia and its environmental impact: approaches to minimize exposure to anesthetic gases and reduce waste

Samad, Khalid; Yousuf, Muhammad Saad*; Ullah, Hameed; Ahmed, Syed Shabbir; Siddiqui, Khalid Maudood; Latif, Asad

Department of Anaesthesiology, Aga Khan University Hospital, Karachi, Pakistan

Abstract

In today’s era of modern healthcare, the intersection between medical practices and environmental responsibility has gained significant attention. One such area of focus is the practice of anesthesia, which plays a crucial role in various surgical procedures. Anesthetics such as nitrous oxide and volatile halogenated ethers (desflurane, isoflurane, sevoflurane) are examples of medical gases that are strong greenhouse gases that contribute to global warming. During medical procedures, most of these anesthetic agents are released into the atmosphere, which exacerbates their influence on the environment. Also anesthesia delivery systems have traditionally utilized high flow rates of gases, leading to not only excessive consumption but also a considerable environmental impact in terms of greenhouse gas emissions. However, the emergence of low-flow anesthesia (LFA) presents a promising solution for achieving emission reduction and cost savings, thereby aligning healthcare practices with sustainability goals. Understanding LFA involves the administration of anesthetic gases to patients at reduced flow rates compared to conventional high-flow methods. This practice requires precision in gas delivery, often incorporating advanced monitoring and control systems. By optimizing gas flow to match the patient’s requirements, LFA minimizes wastage and excessive gas release into the environment, subsequently curbing the carbon footprint associated with healthcare operations. Decreasing volatile anesthetic delivery provides safe and effective strategies for anesthesia providers to decrease costs and reduce environmental pollution. Current literature support in favor of LFA represents an area of cost containment and an opportunity to lessen the environmental impact of anesthesia. This article will cover the concept of LFA, the distinctions between low flow and minimal flow, and the potential advantages of LFA, such as those related to patient safety, the environment, and the economy.

摘要：

在当今现代社会中，医疗实践与环境责任之间的交织已经引起了人们的极大关注。其中一个重点领域是麻醉，其在各种外科手术中起着至关重要的作用。一氧化二氮（N₂O）和地氟烷、异氟烷、七氟烷等挥发性卤化醚等麻醉剂是导致全球变暖的温室气体之一。在麻醉中，大多数麻醉剂会被释放到空气中，加剧了其对环境的影响。此外，麻醉输送系统传统上使用高流速的气体，这不仅导致过度消耗，且可能会存在温室气体排放问题。低流量麻醉的出现为实现减排和成本节约提供了一个潜在的解决方案，从而达到医疗与可持续发展双重目的。与传统的高流量方法相比，低流量麻醉是以较低的流速施用麻醉气体。这种做法需要精确的气体输送，通常包括先进的监测和控制系统。通过优化气体流量以满足患者的需求，低流量麻醉可最大限度地减少浪费和向环境中过度释放的气体，从而遏制了与医疗保健操作相关的碳足迹。减少挥发性麻醉剂的输送也为麻醉提供者提供了安全有效的策略，以降低成本和减少环境污染。此次综述总结了低流量麻醉的概念、低流量和最小流量之间的区别以及低流量麻醉的潜在优势，包括与患者安全、环境和经济相关的优势。