Clinical Guidance for Sustainable Low-Emission Perioperative Care

Abstract

Growing awareness of healthcare’s environmental impact has underscored the need for sustainable, low-emission perioperative care. This article critically reviews the current evidence, epidemiology, and clinical guidance for integrating environmental stewardship into perioperative medicine. It explores mechanisms by which perioperative practice contributes to greenhouse gas emissions, relevant risk factors, and the clinical relevance of transitioning to greener pathways. Emerging research, recent guidelines, and practical recommendations for implementing sustainable strategies in anesthesia, surgery, and perioperative processes are discussed, providing clinicians with actionable insights to balance patient safety with environmental responsibility.

Introduction

Healthcare contributes approximately 4–5% of global greenhouse gas (GHG) emissions, with perioperative care a resource-intensive discipline playing a significant role. The perioperative period encompasses a spectrum of activities, including anesthesia, surgical interventions, and associated logistics, all of which generate emissions through resource consumption, energy use, and waste. Recognition of the climate crisis as a public health emergency has prompted calls for sustainable perioperative care, with a focus on low-emission strategies that maintain patient outcomes. This review synthesizes recent evidence and clinical guidance to inform and empower perioperative professionals in implementing sustainable practices without compromising care quality.

Epidemiology / Disease Burden

The environmental burden of perioperative care is substantial. Inhalational anesthetics alone contribute up to 2% of the National Health Service (NHS) carbon footprint in the UK, and similar figures are reported globally. A single operating room can generate 5–7 tons of waste annually, much of it non-recyclable and incinerated, releasing harmful emissions. The burden is magnified in high-volume surgical centers and resource-rich settings, but low- and middle-income countries face unique challenges in balancing sustainability with access. The cumulative effect of perioperative emissions exacerbates climate change, which in turn drives adverse health outcomes, creating a feedback loop of environmental and clinical risk.

Pathophysiology

The mechanisms underlying perioperative emissions are multifactorial. Volatile anesthetic agents particularly desflurane and nitrous oxide are potent greenhouse gases with high global warming potentials (GWP). Desflurane, for instance, is 2,540 times more potent than CO2 over a 100-year period. Single-use devices, energy-intensive equipment (such as HVAC systems), and frequent sterilization cycles further increase emissions. The pathophysiology of environmental impact is not direct to the patient, but rather systemic, influencing population health through air pollution, resource depletion, and climate-mediated disease patterns. Understanding these pathways is essential for developing targeted reduction strategies.

Risk Factors

Key risk factors for high perioperative emissions include the use of high-GWP anesthetic gases, preference for single-use consumables, lack of recycling infrastructure, and insufficient staff training in sustainable practices. Institutional factors, such as outdated equipment and inefficient logistics, further compound emissions. Patient complexity, case mix, and surgical volume also influence the environmental footprint. Recognition of these risk factors allows perioperative teams to identify high-impact opportunities for intervention.

Clinical Features

While environmental emissions themselves do not manifest as clinical symptoms in individual patients, their downstream effects are evident at the population level. Increased air pollution, heatwaves, and extreme weather events linked to climate change drive respiratory, cardiovascular, and infectious diseases. Within the hospital setting, excessive waste and resource use may indirectly compromise patient safety through supply shortages or infection risks associated with improper waste management. Clinicians should be aware that the clinical features of unsustainable perioperative care are observed in aggregate population health metrics and healthcare system resilience.

Diagnosis

Diagnosing excessive perioperative emissions involves environmental auditing and life-cycle assessment (LCA) of perioperative processes. Tools such as the Operating Room Environmental Footprint Calculator and carbon footprint analyses can identify high-emission activities and benchmark performance. At the institutional level, regular audits of anesthetic agent usage, waste streams, energy consumption, and supply chains provide actionable data. Diagnosis is foundational for targeted interventions and continuous quality improvement.

Treatment & Management

Management of perioperative emissions requires a multidisciplinary approach. Key strategies include minimizing the use of high-GWP anesthetics favoring sevoflurane, total intravenous anesthesia (TIVA), or regional anesthesia when appropriate; implementing low-flow anesthesia techniques; and prioritizing reusable over single-use devices when safe. Waste segregation, recycling programs, and optimized sterilization protocols reduce landfill and incineration emissions. Energy-saving initiatives, such as LED lighting and HVAC optimization, further decrease the perioperative carbon footprint. Staff education, engagement, and leadership support are critical to sustaining behavioral and systemic changes.

Recent Advances / Emerging Therapies

Recent advances include the adoption of closed-loop anesthesia delivery systems, which minimize volatile agent consumption, and gas capture technologies capable of recycling or neutralizing waste anesthetic gases. Novel biodegradable materials are being developed for surgical drapes and instruments. Digital health platforms now enable real-time monitoring of perioperative emissions, supporting data-driven decision-making. Professional societies have issued consensus statements advocating for sustainable anesthesia and surgery, and quality improvement collaboratives are accelerating the dissemination of best practices globally. Research into the comparative effectiveness of various sustainable interventions is ongoing, offering a continuously evolving evidence base for clinicians.

Guideline Recommendations

The Association of Anaesthetists and the American Society of Anesthesiologists recommend minimizing or eliminating desflurane and nitrous oxide use, adopting low-flow anesthesia, and integrating environmental sustainability into perioperative quality metrics. The NHS Net Zero strategy and similar national frameworks provide structured approaches for emission reduction in surgical and anesthesia practice. Guidelines stress the importance of leadership, staff engagement, and continuous monitoring. Institutions are encouraged to develop sustainability committees, incorporate green metrics into procurement, and align perioperative care with broader institutional environmental goals.

Conclusion

Sustainable low-emission perioperative care is both an ethical imperative and a clinical necessity in the context of the global climate crisis. Through targeted reductions in anesthetic gas use, waste, and energy consumption, perioperative teams can substantially lower the environmental footprint of surgical care without compromising patient outcomes. Ongoing research, professional guidelines, and interdisciplinary collaboration are essential to drive adoption of greener practices. By integrating sustainability into routine perioperative care, clinicians can safeguard both individual patient health and planetary well-being for future generations.