Estimated Global Disease Burden From US Health Care Sector Greenhouse Gas Emissions

EUROPEAN ASSOCIATION OF PERINATAL MEDICINE Position statement: environmental sustainability in obstetric healthcare

Climate change is one of the biggest threats to global health in the 21st century and is responsible for many health complaints and diseases worldwide. The healthcare community is an important contributor to environmental pollution, and the latter has an adverse effect on maternal and fetal health. This paradox needs to be addressed, and healthcare professionals need to take the responsibility for change. The current position statement outlines what is already known about environmental sustainability in obstetric healthcare, and provides recommendations on how to address the problem, based on existing evidence and real-life experiences. To start the transition to a more environmentally sustainable obstetrical healthcare, it is important to establish local dedicated teams, working in collaboration with national or international institutions. Institutional and individual energy-saving behaviours need to be encouraged. Public transportation needs to be promoted, and travel movements reduced, by moving to video appointments, telephone appointments, and telemonitoring, when appropriate. The pharmaceutical impact on the climate also needs to be addressed: inhalation anaesthetics should be avoided, shorter prescriptions should be made, and patients should be educated on how to deal with pharmaceutical waste. It is also important to reconsider the way that certain hospital products are used: surgical trays can be optimised, sterile gowns, gloves and drapes do not always need to be used, and reusable products should be preferred. Finally, the overuse or inadequate use of healthcare services needs to be addressed.

A Comparison of Environmental Impacts Between Reusable and Disposable Flexible Laryngoscopes

INTRODUCTION

There is increasing prevalence of single-use flexible laryngoscopes in Otolaryngology. This study aims to quantify and compare the environmental outcomes of single-use disposable flexible laryngoscopes (SUD-Ls) and reusable flexible laryngoscope (R-Ls).

METHODS

The ISO 14040 standardized Life Cycle Assessment (LCAs) was utilized to estimate the environmental footprint of SUD-L and R-L. Product and packaging material composition, energy and water consumption, and high-level disinfection products were tabulated from on-site observation, manufacturer data, and the Ecoinvent database. Global warming impacts were defined by greenhouse gas emissions (GHGs) quantified by kilograms of carbon dioxide equivalents (kgCO2-eq) and analyzed using the US EPA's TRACI and SimaPro software. Monte Carlo sensitivity analyses were additionally performed.

RESULTS

Assuming a 6-year lifespan and 218 laryngoscopies/year, the R-L saves 804 kgCO2-eq compared to SUD-L (1816 vs 2619 kgCO2-eq). Notably 63% of the R-L total GHGs were due to personal protective equipment (PPE) production and disposal used in reprocessing, whereas 79% of SUD-L total GHGs were attributed to scope manufacturing and production. In a break-even analysis, a R-L produces fewer lifespan GHGs than SUD-Ls after 82 uses.

CONCLUSION

Reusable flexible laryngoscopes pose an environmental benefit over SUD-Ls across several impact categories when used in high frequency. SUD-Ls have significant advantages in various situations: low utilization settings, in-patient/ED consults, and urgent need for sterile instrumentation. Providers should assess laryngoscope use frequency, site of use, and available resources to balance the environmental consequences. Further areas of sustainable optimization include reducing disposable PPE used in R-L reprocessing.

LEVEL OF EVIDENCE

NA Laryngoscope, 135:1666-1673, 2025.

Environmental sustainability in cardiovascular practice: current challenges and future directions

Cardiovascular disease is the leading cause of morbidity and mortality worldwide, with a substantial amount of health-care resources targeted towards its diagnosis and management. Environmental sustainability in cardiovascular care can have an important role in reducing greenhouse gas emissions and pollution and could be beneficial for improving health metrics and societal well-being and minimizing the cost of health care. In this Review, we discuss the motivations and frameworks for sustainable cardiovascular care with an emphasis on the reduction of the climate-related and environmental effects of cardiovascular care. We also provide an overview of greenhouse gas emissions related to the provision of health care, including their measurement and quantification, carbon accounting, carbon disclosures and climate effects. The principles of life-cycle assessment, waste prevention and circular economics in health care are discussed, and the emissions associated with various sectors of cardiovascular care as well as the rationale for prevention as a powerful approach to reduce these emissions are presented. Finally, we highlight the challenges in environmental sustainability and future directions as applicable to cardiovascular practice.

Climate Therapy: Sustainability Solutions for Breast Cancer Care in the Anthropocene Era

Climate change is the greatest threat to human existence. Currently it impacts breast cancer care by disrupting treatment, by food poverty and economic hardship and through fossil fuel pollution which increases breast cancer incidence. These impacts are greatest in those already experiencing deprivation. However, healthcare (including breast cancer care) is not an innocent bystander in climate change. The carbon emissions of healthcare are equivalent to the continent of Africa with 1.5 billion people. Like all other enterprises healthcare has an obligation to move to net zero carbon emissions. Previously conducted studies of healthcare professionals have highlighted the role of guidance documents to facilitate climate engagement by them. This prompted the formation of an interdisciplinary group to review the intersection points between breast cancer care and planetary health. A solution tree of sustainable solutions for practicing clinicians is proposed which can be integrated into daily clinical practice and into their personal lives.

Use of water in dialysis and its impact on the environment

PURPOSE OF REVIEW

The climate crisis poses significant challenges across various sectors, including healthcare, where resource consumption often exacerbates environmental issues. This review addresses concerns over current levels of water use for dialysis treatment, a critical procedure for patients with kidney failure. Despite its life-saving importance, the dialysis process consumes large quantities of water, contributing to water scarcity and increased carbon emissions associated with water treatment and distribution.

RECENT FINDINGS

Through a comprehensive analysis of current practices, we identify inefficiencies and propose sustainable alternatives aimed at reducing water usage in dialysis.

SUMMARY

Findings indicate that optimizing treatment protocols and considering innovative technologies can significantly mitigate the environmental impact while maintaining patient care standards. This review underscores the urgent need for the healthcare sector to adopt sustainable practices in response to the climate crisis.

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

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.

Using Chronic Kidney Disease as a Model Framework to Estimate Healthcare-Related Environmental Impact

INTRODUCTION

While the economic and clinical burden of chronic diseases are well documented, their environmental impact remains poorly understood. We developed a framework to estimate the environmental impact of a disease care pathway using chronic kidney disease (CKD) as an example.

METHODS

A life cycle assessment framework was developed for the CKD care pathway and validated by experts. Life cycle stages were characterised for resource utilisation based on a literature review and ecoinvent database inputs, in ten countries. The ReCiPe impact assessment method was used to calculate impacts across multiple environmental dimensions.

RESULTS

At CKD stage 5, kidney replacement therapies (KRT) have highest impact; emissions ranged between 3.5 and 43.9 kg carbon dioxide equivalents (CO2e) per session depending on dialysis modality, and 336-2022 kg CO2e for kidney transplant surgery, depending on donor type. Hospitalisations have a substantial environmental impact: a 1-day intensive care stay had highest impact (66.4-143.6 kg CO2e), followed by a 1-day hospital stay (28.8-63.9 kg CO2e) and an 8-h emergency room visit (14.4-27.5  kg CO2e). Patient transport to and from healthcare sites was a key driver of environmental impact for all life cycle stages, representing up to 99.5% of total CO2e emissions.

CONCLUSION

Full care pathways should be analysed alongside specific healthcare processes. Application of this framework enables quantification of the environmental benefits of preventative medicine and effective management of chronic diseases. For CKD, early diagnosis, and proactive management to reduce the need for KRT and hospitalisations could improve patient outcomes and reduce environmental burden.

TRASH-CAN: An Approach to Promote Planetary Health Education and Research for Health Care Trainees

Background As future health care leaders who work and train in diverse clinical settings, resident physicians are uniquely positioned to advance sustainable health care systems. However, residents are insufficiently educated about health care sustainability and given limited opportunities to engage in planetary health. Objective This article introduces and reports on the early outcomes of the Trainee-Led Research and Audit for Sustainability in Healthcare Canada (TRASH-CAN), a resident-driven initiative launched in 2023 with the aim of reducing Canadian health care's environmental impact. Methods In 2023-2024, we developed a web-based platform that facilitates trainee-led action to support the promotion of sustainability literature, collaboration with national and international institutions, and execution of quality improvement projects to reduce health care waste under the 3 brand pillars of Learning, Leadership, and Delivery. We have promoted TRASH-CAN and its website through conference presentations, social media, mailing lists, and word of mouth. These activities support our goals of engaging trainees, pairing them with mentors, and initiating a variety of quality improvement projects focused on planetary health. Results In its first year of operation, TRASH-CAN has developed a fully functional website hosting intake forms and detailing ongoing projects and opportunities. We have enrolled 15 faculty mentors and 16 residents and medical students, with ongoing projects such as transitioning hospitals to reusable alternatives and optimizing procedural custom operating room equipment packs. Conclusions TRASH-CAN's inaugural year has led to the initiation of 11 sustainability projects and the enrollment of 31 faculty mentors and trainees.

Strategies and tactics to reduce the impact of healthcare on climate change: systematic review

OBJECTIVE

To review the international literature and assess the ways healthcare systems are mitigating and can mitigate their carbon footprint, which is currently estimated to be more than 4.4% of global emissions.

DESIGN

Systematic review of empirical studies and grey literature to examine how healthcare services and institutions are limiting their greenhouse gas (GHG) emissions.

DATA SOURCES

Eight databases and authoritative reports were searched from inception dates to November 2023.

ELIGIBILITY CRITERIA FOR SELECTING STUDIES

Teams of investigators screened relevant publications against the inclusion criteria (eg, in English; discussed impact of healthcare systems on climate change), applying four quality appraisal tools, and results are reported in accordance with PRISMA (preferred reporting items for systematic reviews and meta-analyses).

RESULTS

Of 33 737 publications identified, 32 998 (97.8%) were excluded after title and abstract screening; 536 (72.5%) of the remaining publications were excluded after full text review. Two additional papers were identified, screened, and included through backward citation tracking. The 205 included studies applied empirical (n=88, 42.9%), review (n=60, 29.3%), narrative descriptive (n=53, 25.9%), and multiple (n=4, 2.0%) methods. More than half of the publications (51.5%) addressed the macro level of the healthcare system. Nine themes were identified using inductive analysis: changing clinical and surgical practices (n=107); enacting policies and governance (n=97); managing physical waste (n=83); changing organisational behaviour (n=76); actions of individuals and groups (eg, advocacy, community involvement; n=74); minimising travel and transportation (n=70); using tools for measuring GHG emissions (n=70); reducing emissions related to infrastructure (n=63); and decarbonising the supply chain (n=48).

CONCLUSIONS

Publications presented various strategies and tactics to reduce GHG emissions. These included changing clinical and surgical practices; using policies such as benchmarking and reporting at a facility level, and financial levers to reduce emissions from procurement; reducing physical waste; changing organisational culture through workforce training; supporting education on the benefits of decarbonisation; and involving patients in care planning. Numerous tools and frameworks were presented for measuring GHG emissions, but implementation and evaluation of the sustainability of initiatives were largely missing. At the macro level, decarbonisation approaches focused on energy grid emissions, infrastructure efficiency, and reducing supply chain emissions, including those from agriculture and supply of food products. Decarbonisation mechanisms at the micro and meso system levels ranged from reducing low value care, to choosing lower GHG options (eg, anaesthetic gases, rescue inhalers), to reducing travel. Based on these strategies and tactics, this study provides a framework to support the decarbonisation of healthcare systems.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO: CRD42022383719.

Reusable surgical headwear has a reduced carbon footprint and matches disposables regarding surgical site infection: a systematic review and meta-analysis

Surgical headwear is designed to maintain sterility and prevent microbial contamination. However, the environmental impact of the healthcare industry carries an obligation to develop sustainable alternatives. We aim to explore the environmental impact and safety of reusable surgical headwear. A systematic review and meta-analysis were performed using MEDLINE, Embase, Scopus, Google Scholar, PubMed, and the Cochrane Library until December 10, 2023. Studies were reviewed for suitability and risk of bias using the ROBINS-I tool, with the results aggregated using Review Manager Version 5.4 for odds ratios (ORs) and 95% confidence intervals (CIs), and the I2 was used to assess heterogeneity. This systematic review included nine studies, and the meta-analysis included six studies involving 45,708 procedural cases. There was no significant difference in surgical site infection (SSI) rates between the reusable and disposable groups (OR: 0.79; 95% CI: 0.59-1.07; P=0.13). Policy implementation did not affect SSI rates (OR: 1.21; 95% CI: 0.85-1.73; P=0.30). Reusable surgical head covers demonstrated a significantly lower carbon footprint (P<0.001), ozone depletion (P<0.005), fossil fuel depletion (P<0.005), terrestrial acidification (P<0.005), and fine particulate matter formation (P<0.005) than disposable alternatives. Reusable surgical headwear matches disposable options for SSI incidence and offers environmental advantages. These findings support a shift towards reusable alternatives in healthcare, aligning patient safety with ecological responsibility. By adopting reusable alternatives, healthcare systems can actively contribute to planetary health, thereby highlighting the significant role of sustainable practices in modern medical settings.

Opportunities for Strengthening Climate Education for Clinical Health Professionals

As we bear witness to increasing disease, injury, disruption, and displacement from a changing climate, health professional education is finally coalescing around the imperative to upgrade training programs to address this health threat. There remains a conspicuous knowledge gap within health care on basic environmental health linkages, health vulnerabilities susceptible to climate change, health care system sustainability and resiliency, and climate health communication and leadership. The authors will review successful examples and demonstrable impacts of current efforts to scale-up a climate-savvy health care workforce and will close with a review of opportunities ahead for this urgent educational movement.

Ethical Considerations in the Management of Orthopedic Surgery Waste: Balancing Environmental Protection and Participant Safety

The healthcare sector significantly contributes to global greenhouse gas (GHG) emissions, with orthopedic surgery generating substantial waste, including single-use devices and hazardous materials. These practices exacerbate climate change and environmental degradation. This article explores the environmental and ethical implications of waste management in orthopedic surgery, focusing on the need for sustainable practices. Key approaches include recycling and reusing materials, implementing closed-loop supply chains, and promoting sustainable procurement. Case studies from various countries, such as Asia (India, Pakistan, Bangladesh), Africa, and Latin America, highlight the challenges and progress in managing medical waste, emphasizing the substantial potential for recycling preoperative waste. Ethical considerations revolve around ensuring safe waste handling to protect healthcare workers, patients, and communities while maintaining high standards of care. This should be done as per infection control and biomedical waste protocols. National and international ethical guidelines extend their discussion to the principles of biomedical and health ethics (autonomy, beneficence, non-maleficence, and justice), especially regarding informed consent and the reuse of medical devices. Patients should be fully informed about environmental and waste management practices, with an emphasis on transparency and voluntary participation. The reuse of external fixators, while cost-effective, raises questions about ownership, safety, and cost transparency. The article underscores the importance of adopting eco-friendly practices and green technologies in healthcare to mitigate the sector's carbon footprint. Initiatives such as energy-efficient buildings, renewable energy sources, and comprehensive recycling programs are vital. The conclusion calls for regulatory bodies and healthcare organizations to enforce guidelines for ethical waste management, balancing cost-effective practices with patient autonomy and environmental responsibility. Ethical waste management in orthopedic surgery is crucial for protecting the environment and the service providers and ensuring the well-being of all stakeholders involved.

[The environmental impact of digital technology and artificial intelligence, in the era of digital pathology]

While digitization and artificial intelligence represent the future of our specialty, future is also constrained by global warming and overstepping of planetary limits, threatening human health and the functioning of the healthcare system. The report by the Délégation ministérielle du numérique en santé and the French government's ecological planning of the healthcare system confirm the need to control the environmental impact of digital technology. Indeed, despite the promises of dematerialization, digital technology is a very material industry, generating greenhouse gas emissions, problematic consumption of water and mineral resources, and social impacts. The digital sector is impacting at every stage: (i) manufacture of equipment; (ii) use; and (iii) end-of-life of equipment, which, when recycled, can only be recycled to a very limited extent. This is a fast-growing sector, and the digitization of our specialty is part of its acceleration and its impact. Understanding the consequences of digitalization and artificial intelligence, and phenomena such as the rebound effect, is an essential prerequisite for the implementation of a sober, responsible, and sustainable digital pathology. The aim of this update is to help pathologists better understand the environmental impact of digital technology. As healthcare professionals, we have a responsibility to combine technological advances with an awareness of their impact, within a systemic vision of human health.

Assessing the Environmental and Downstream Human Health Impacts of Decentralizing Cancer Care

Importance

Greenhouse gas (GHG) emissions from health care are substantial and disproportionately harm persons with cancer. Emissions from a central component of oncology care, outpatient clinician visits, are not well described, nor are the reductions in emissions and human harms that could be obtained through decentralizing this aspect of cancer care (ie, telemedicine and local clinician care when possible).

Objective

To assess potential reductions in GHG emissions and downstream health harms associated with telemedicine and fully decentralized cancer care.

Design, Setting, and Participants

This population-based cohort study and counterfactual analyses using life cycle assessment methods analyzed persons receiving cancer care at Dana-Farber Cancer Institute between May 2015 and December 2020 as well as persons diagnosed with cancer over the same period from the Cancer in North America (CiNA) public dataset. Data were analyzed from October 2023 to April 2024.

Main Outcomes and Measures

The adjusted per-visit day difference in GHG emissions in kilograms of carbon dioxide (CO2) equivalents between 2 periods: an in-person care model period (May 2015 to February 2020; preperiod) and a telemedicine period (March to December 2020; postperiod), and the annual decrease in disability-adjusted life-years in a counterfactual model where care during the preperiod was maximally decentralized nationwide.

Results

Of 123 890 included patients, 73 988 (59.7%) were female, and the median (IQR) age at first diagnosis was 59 (48-68) years. Patients were seen over 1.6 million visit days. In mixed-effects log-linear regression, the mean absolute reduction in per-visit day CO2 equivalent emissions between the preperiod and postperiod was 36.4 kg (95% CI, 36.2-36.6), a reduction of 81.3% (95% CI, 80.8-81.7) compared with the baseline model. In a counterfactual decentralized care model of the preperiod, there was a relative emissions reduction of 33.1% (95% CI, 32.9-33.3). When demographically matched to 10.3 million persons in the CiNA dataset, decentralized care would have reduced national emissions by 75.3 million kg of CO2 equivalents annually; this corresponded to an estimated annual reduction of 15.0 to 47.7 disability-adjusted life-years.

Conclusions and Relevance

This cohort study found that using decentralization through telemedicine and local care may substantially reduce cancer care's GHG emissions; this corresponds to small reductions in human mortality.

Green hospitals: Mitigating water footprint and greenhouse gas emissions through sustainable menu planning in Turkish state university hospitals

Considering the importance of sustainable nutrition, it is important that hospitals' meal menus are planned to ensure the lowest possible environmental footprint. In this study, we aimed to evaluate the environmental effects of hospital menus and the changes that may occur when these menus are planned according to the Turkey Dietary Guidelines and Mediterranean diet recommendations. In this context, first, the yearly environmental footprints of the standard meal menus of the state university hospitals in Turkey (n = 42), including water footprint (WF) and greenhouse gas emission (GHGE) values, were determined. Second, changes in the environmental footprint as a result of arranging the standard meal menus of state university hospitals according to the Turkey Dietary Guidelines and Mediterranean nutritional models were evaluated. It was determined that the average WF and GHGE values of hospital menus were 137,280 ± 18537.2 L/month and 140.0 ± 18.4 kg CO2-eq/month, respectively. Adjusting state university hospitals' standard meal menus according to Turkey Dietary Guidelines and Mediterranean nutritional models reduced WF by 24.8% to 103206.7 L/month and 37.8% to 85420.5 L/month, and GHGEs by 31.7% to 95.5 kg CO2-eq/month and 49% to 71.3 kg CO2-eq/month, respectively. In addition, it was determined that hospital meal menus planned according to the Turkey Dietary Guidelines and the Mediterranean nutritional model contained lower saturated fat and cholesterol and higher dietary fiber. In conclusion, planning hospital menus according to the Turkey Dietary Guidelines and Mediterranean nutritional recommendations can reduce the environmental footprint of hospital food services.

Health burden and costs attributable to the carbon footprint of the health sector in the European Union

BACKGROUND

The healthcare sector has an environmental impact of around 4.6% of global CO2 emissions, contributing to aggravating the climate crisis. However, the impact of the health sector's emissions on human health is not regularly assessed. We aim to estimate the health burden and associated costs of the health sector's carbon footprint within the European Union (EU).

METHODS

We calculated disability-adjusted life years (DALYs) and associated costs based on human health damage factors (DALYs/kg-CO2e) by considering four scenarios. Three scenarios for shared socioeconomic pathways (S1 - high growth, S2 - baseline, and S3 - low growth) represented variations of global society, demographics, and economics until 2100. A fourth scenario (S4) considered the current EU's 55% reduction goal of greenhouse gas emissions. The healthcare sector's emissions per capita (in CO2-equivalent) in 2019 were extracted from the Lancet Countdown, and population data were retrieved from Eurostat for the same year.

RESULTS

In the EU, 365,047 DALYs (95%CI: 194,692-535,403) are expected to be caused by the health sector's emissions at baseline (S2). In an S1 scenario, the burden would slightly decrease to 316,374 DALYs (95%CI: 170,355-462,393), whereas a S3 scenario would increase 486,730 DALYs (95%CI: 243,365-681,422). If EU's carbon goals are met, the burden could be substantially reduced to 164,271 DALYs (95%CI: 87,611-240,931). Costs can amount to 25.6 billion euros, when considering DALYs monetisation.

CONCLUSION

CO2 emissions from the health sector are expected to significantly impact human health. Therefore, it is important to ensure that EU climate policies for public buildings are in line with the Paris Agreement, increase funding for climate mitigation programs within the healthcare sector, and review clinical practices at the local level.

A Life Cycle Assessment of Reusable and Disposable Surgical Caps

INTRODUCTION

Surgical cap attire plays an important role in creating a safe and sterile environment in procedural suites, thus the choice of reusable versus disposable caps has become an issue of much debate. Given the lack of evidence for differences in surgical site infection (SSI) risk between the two, selecting the cap option with a lower carbon footprint may reduce the environmental impact of surgical procedures. However, many institutions continue to recommend the use of disposable bouffant caps.

METHODS

ISO-14044 guidelines were used to complete a process-based life cycle assessment to compare the environmental impact of disposable bouffant caps and reusable cotton caps, specifically focusing on CO2 equivalent (CO2e) emissions, water use and health impacts.

RESULTS

Reusable cotton caps reduced CO2e emissions by 79% when compared to disposable bouffant caps (10 kg versus 49 kg CO2e) under the base model scenario with a similar reduction seen in disability-adjusted life years. However, cotton caps were found to be more water intensive than bouffant caps (67.56 L versus 12.66 L) with the majority of water use secondary to production or manufacturing.

CONCLUSIONS

Reusable cotton caps have lower total lifetime CO2e emissions compared to disposable bouffant caps across multiple use scenarios. Given the lack of evidence suggesting a superior choice for surgical site infection prevention, guidelines should recommend reusable cotton caps to reduce the environmental impact of surgical procedures.

Plastic waste in major orthopaedic surgical procedures: descriptive and sources of improvement

PURPOSE

The healthcare industry is a significant contributor to single-use plastic waste, particularly in the operating room (OR). This study aims to assess the volume of plastic waste generated during total hip, knee, and shoulder arthroplasty in the OR and identify areas for improvement.

METHOD

A prospective transversal study at a tertiary hospital was conducted. All total knee arthroplasty (TKA), total hip arthroplasty (THA), and reverse shoulder arthroplasty (RSA) from April to July 2021 were included. The weight of plastic used during patient preparation, anaesthesia, and the surgical procedure was recorded. To calculate the environmental impact, a calculator generated by the United States Environmental Protection Agency (U.S. EPA) was used.

RESULTS

A total of 68 surgeries were included. The mean weight of plastic used in total was 7.3 kg (SD 0.48), with the highest yielding procedure being TKA. It generated a mean of 7.63 kg (SD 0.28), followed by THA at 7.28 kg (SD 0.43), and RSA at 6.87 kg (SD 0.47). Various scenarios were simulated to evaluate the potential impact of reducing plastic waste. Substituting plastic wrapping with recyclable materials could save 159.6 kg of CO2 emissions per 100 prostheses. Eliminating non-essential equipment and adopting reusable fabric drapes also showed a significant potential.

CONCLUSION

The findings highlight the need for environmentally sustainable practices in the OR. In this way, the healthcare sector can contribute to a cleaner and greener world without compromising patient safety.

The impact of air pollution and climate change on eye health: a global review

Climate change has important implications on human health, affecting almost every system in the body. Multiple studies have raised the possibility of climate change impacting eye health. In this review, we aimed to summarize current literature on the impact of air pollution and climate change on eye health. We performed a search in four different databases, including Medline, Scopus, Cochrane, and Web of Sciences databases. The search strategy combined terms regarding eye health and environmental/climate changes. The outcome of interest included all eye conditions. The search yielded 2,051 unique articles. After applying inclusion and exclusion criteria, 61 articles were included in this systematic review with data covering 2,620,030 participants. Most studies originated from China, India, South Korea, and USA. Climate change adversely affected different eye conditions, with ocular surface diseases (e.g., conjunctivitis and dry eye) being most affected. Moreover, higher particulate matter (PM) was the most widely assessed pollutant and was adversely associated with the majority of eye conditions, increasing the burden on patients and healthcare providers. We found a low frequency of publications related to the delivery of eye care and its impact on climate change in countries with high air pollution and climate change burden.

Effect of unidirectional airflow ventilation on surgical site infection in cardiac surgery: environmental impact as a factor in the choice for turbulent mixed air flow

BACKGROUND

Surgical site infection (SSI) in the form of postoperative deep sternal wound infection (DSWI) after cardiac surgery is a rare, but potentially fatal, complication. In addressing this, the focus is on preventive measures, as most risk factors for SSI are not controllable. Therefore, operating rooms are equipped with heating, ventilation and air conditioning (HVAC) systems to prevent airborne contamination of the wound, either through turbulent mixed air flow (TMA) or unidirectional air flow (UDAF).

AIM

To investigate if the risk for SSI after cardiac surgery was decreased after changing from TMA to UDAF.

METHODS

This observational retrospective single-centre cohort study collected data from 1288 patients who underwent open heart surgery over 2 years. During the two study periods, institutional SSI preventive measures remained the same, with the exception of the type of HVAC system that was used.

FINDINGS

Using multi-variable logistic regression analysis that considered confounding factors (diabetes, obesity, duration of surgery, and re-operation), the hypothesis that TMA is an independent risk factor for SSI was rejected (odds ratio 0.9, 95% confidence interval 0.4-1.8; P>0.05). It was not possible to demonstrate the preventive effect of UDAF on the incidence of SSI in patients undergoing open heart surgery when compared with TMA.

CONCLUSION

Based on these results, the use of UDAF in open heart surgery should be weighed against its low cost-effectiveness and negative environmental impact due to high electricity consumption. Reducing energy overuse by utilizing TMA for cardiac surgery can diminish the carbon footprint of operating rooms, and their contribution to climate-related health hazards.

Establishing and Defining an Approach to Climate Conscious Clinical Medical Ethics

An anthropocentric scope for clinical medical ethics (CME) has largely separated this area of bioethics from environmental concerns. In this article, we first identify and reconcile the ethical issues imposed on CME by climate change including the dispersion of related causes and effects, the transdisciplinary and transhuman nature of climate change, and the historic divorce of CME from the environment. We then establish how several moral theories undergirding modern CME, such as virtue ethics, feminist ethics, and several theories of justice, promote both a flourishing of human medical practice and the environment. We conclude by defining an expanded the scope of CME as inclusive of not only patients, families, physicians, and other health professionals but other humans, non-humans, and their shared environment. We then apply this scope and theory to a widely used framework for applying CME, the Four Topics model, to construct a climate conscious approach to CME.

Soil respiration and its response to climate change and anthropogenic factors in a karst plateau wetland, southwest China

It is important to investigate the responses of greenhouse gases to climate change (temperature, precipitation) and anthropogenic factors in plateau wetland. Based on the DNDC model, we used meteorological, soil, and land cover data to simulate the soil CO2 emission pattern and its responses to climate change and anthropogenic factors in Guizhou, China. The results showed that the mean soil CO2 emission flux in the Caohai Karst Plateau Wetland was 5.89 ± 0.17 t·C·ha-1·yr-1 from 2000 to 2019, and the annual variation showed an increasing trend with the rate of 23.02 kg·C·ha-1·yr-1. The soil total annual mean CO2 emissions were 70.62 ± 2.04 Gg·C·yr-1 (annual growth rate was 0.28 Gg·C·yr-1). Caohai wetland has great spatial heterogeneity. The emissions around Caohai Lake were high (the areas with high, middle, and low values accounted for 3.07%, 70.96%, and 25.97%, respectively), and the emission pattern was characterized by a decrease in radiation from Caohai Lake to the periphery. In addition, the cropland and forest areas exhibited high intensities (7.21 ± 0.15 t·C·ha-1·yr-1 and 6.73 ± 0.58 t·C·ha-1·yr-1, respectively) and high total emissions (54.97 ± 1.16 Gg·C·yr-1 and 10.24 ± 0.88 Gg·C·yr-1, respectively). Croplands and forests were the major land cover types controlling soil CO2 emissions in the Caohai wetland, while anthropogenic factors (cultivation) significantly increased soil CO2 emissions. Results showed that the soil CO2 emissions were positively correlated with temperature and precipitation; and the temperature change had a greater impact on soil respiration than the change in precipitation. Our results indicated that future climate change (increased temperature and precipitation) may promote an increase in soil CO2 emissions in karst plateau wetlands, and reasonable control measures (e.g. returning cropland to lakes and reducing anthropogenic factors) are the keys to controlling CO2 emissions.

Systematic review of carbon footprint of surgical procedures

The ecological sustainability of the operating room (OR) is a matter of recent interest. The present systematic review aimed to review the current literature assessing the carbon footprint of surgical procedures in different surgical fields. Following to the PRISMA statement checklist, three databases (MEDLINE, EMBASE, Cochrane Library) were searched by independent reviewers, who screened records on title and abstract first, and then on the full text. Risk of bias was evaluated using the MINORS system. Over the 878 articles initially identified, 36 original studies were included. They considered ophthalmologic surgical procedures (30.5%), general/digestive surgery (19.4%), gynecologic procedures (13.9%), orthopedic procedures (8.3%), neurosurgery (5.5%), otolaryngology/head and neck surgery (5.5%), plastic/dermatological surgery (5.5%), and cardiac surgery (2.8%). Despite a great methodological heterogeneity, data showed that a single surgical procedure emits 4-814 kgCO2e, with anesthetic gases and energy consumption representing the largest sources of greenhouse gas emission. Minimally invasive surgical techniques may require more resources than conventional open surgery, particularly for packaging and plastics, energy use, and waste production. Each OR has the potential to produce from 0.2 to 4kg of waste per case with substantial differences depending on the type of intervention, hospital setting, and geographic area. Overall, the selected studies were found to be of moderate quality. Based on a qualitative synthesis of the available literature, the OR can be targeted by programs and protocols implemented to reduce the carbon footprint and improve the waste stream of the OR.

Environmental Impact of Adult Tonsillectomy: Life Cycle Assessment and Cost Comparison of Techniques

OBJECTIVES

To quantify and compare the cost and environmental impact of different techniques for adult tonsillectomy surgery, and to identify target areas for impact reduction.

METHODS

Fifteen consecutive adult tonsillectomy surgeries were prospectively randomized to one of three tonsillectomy techniques: cold, monopolar electrocautery, or low-temperature radiofrequency ablation (Coblation). Life cycle assessment was used to comprehensively evaluate the environmental impact of study surgeries. Outcomes assessed included multiple measures of environmental impact, including greenhouse gas (GHG) emissions, and cost. Environmental impact measures were analyzed to identify highest-yield areas for improvement, and outcomes were compared between surgical techniques using statistical analysis.

RESULTS

GHG emissions for cold, monopolar electrocautery, and Coblation techniques were 157.6, 184.5, and 204.7 kilograms of carbon dioxide equivalents (kgCO2 -eq) per surgery, respectively, with costs totaling $472.51, $619.10, and $715.53 per surgery, respectively. Regardless of surgery technique, anesthesia medications and disposable equipment contributed most to environmental harm. Cold technique demonstrated reduced environmental impact related to disposable surgical equipment in the categories of greenhouse gas emissions, acidification of soil and water, eutrophication of air, ozone depletion, release of carcinogenic, and non-carcinogenic toxic substances, and respiratory pollutant production (p < 0.05 for all comparisons with other techniques).

CONCLUSION

Within the boundaries of operating room processes, cold technique minimizes cost and environmental impact of adult tonsillectomy surgery, with statistical significance noted in the impact of disposable surgical equipment. Areas of highest potential for improvement identified include reducing use of disposable equipment and collaboration with the Anesthesiology care team to streamline medication use.

LEVEL OF EVIDENCE

2, randomized trial Laryngoscope, 134:622-628, 2024.

Environmental Sustainability: Waste Audit Comparison Operating Roomand In-Office Laryngeal Surgery

INTRODUCTION

With vast improvements in imaging and endoscopic technology, there has been a massive shift towards in office procedures for various laryngeal disorders with significant health system and patient benefits. Another benefit which has yet to be investigated is the potential environmental effects and waste reduction of in-office laryngeal procedures over traditional operating room surgery.

OBJECTIVES

The purpose of this study is to perform a waste audit and compare the results between operating room and in-office laser laryngeal surgery.

METHODS

Ten cases of in-office and operating room laser laryngeal surgery, performed for recurrent respiratory papillomatosis, were subjected to a waste audit with four waste streams identified. Recyclable, general waste, anesthesia source and sharps. All waste was included from the time of case preparation to termination.

RESULTS

The cases were extremely homogeneous in the waste produced. The mean waste total produced for the operating room laser surgery was 2972 g of which 18% was recoverable/recyclable. Contamination rate was very low. Recycling was performed very well by nursing/prep staff; however, anesthesia was not recovering 13% of potential materials. The in-office waste produced was approximately one tenth of the operating room waste with almost all delegated into general waste. Potentially divertible/recyclable materials accounted for 38% of the waste in-office procedures.

CONCLUSIONS

In-office laryngeal procedures produce 13% of waste compared to surgery performed for similar pathology. These procedures are cost effective, safe and have been demonstrated to enhance environmental sustainability.

LEVEL OF EVIDENCE

NA Laryngoscope, 134:803-806, 2024.

Sustainability and Green Practices in the Neurosurgical Operating Room: A Scoping Literature Review

BACKGROUND

The healthcare sector is a significant contributor to worldwide greenhouse gas emissions. The specific environmental impacts of neurosurgical operations remain largely unexplored.

OBJECTIVE

To identify and review existing literature on sustainability and environmental impacts in the neurosurgical operating room, with an aim to assess scope and scale, and secondarily to evaluate potential interventions pertinent to neurosurgery.

METHODS

PubMed, Medline, and Scopus were searched for English-language articles published through July 2023 topically related to operating room sustainability practices and environmental impacts, with attention paid to neurosurgery.

RESULTS

A primary search identified 5 articles that specifically addressed sustainability issues within neurosurgery; 3 were observational studies, 1 was retrospective, and 1 was a prospective study. A further 12 studies (4 observational, 4 systematic reviews, 3 prospective, 1 a survey on barriers to practice adoption) were evaluated to access the broader scope of environmental impacts of surgery that may be relatable to neurosurgery. Key reviewed subdomains included resource conservation, waste production, and carbon footprinting.

CONCLUSION

There is a paucity of literature on sustainability practices within the field of neurosurgery. Here we identify the available evidence on the environmental impact of neurosurgical care and describe some avenues to reduce this impact by exploring surgical sustainability literature more broadly.

Planetary Health in Rehabilitation: A Call to Arms… and Legs, Gait Aids, and Other Equipment

ABSTRACT

Sometimes out of necessity and sometimes out of convenience, medicine is wasteful. Resource stewardship is a critical and expanding field for reducing wasteful practices. Numerous international organizations are driving resource stewardship globally, including >20 countries worldwide participating in Choosing Wisely initiatives. However, opportunities for environmental stewardship have been long overlooked. Planetary health, climate action, and environmental stewardship in medicine consider opportunities which offer a co-benefit to the planet while improving or maintaining appropriate patient care across the healthcare continuum, including acute care, transitions in care, and postacute care, as well as in primary, secondary, and tertiary care settings. As rehabilitation is necessary across all healthcare settings, developing a culture among rehabilitation care providers that is conscientious about planetary health is imperative for sustainability of rehabilitation medicine and the health of our planet. We devised a recommendation for Choosing Wisely Canada's planetary health focus: don't dispose of adaptive equipment, mobility devices, orthoses, and prostheses that could be reused or recycled. This brief report discusses 1) why rehabilitation providers should engage with planetary health and climate action; 2) the rationale for the Choosing Wisely Canada Physical Medicine & Rehabilitation planetary health recommendation; and 3) existing avenues and novel opportunities for rehabilitation care providers worldwide to reduce waste in rehabilitation.

UK health researchers' considerations of the environmental impacts of their data-intensive practices and its relevance to health inequities

BACKGROUND

The health sector aims to improve health outcomes and access to healthcare. At the same time, the sector relies on unsustainable environmental practices that are increasingly recognised to be catastrophic threats to human health and health inequities. As such, a moral imperative exists for the sector to address these practices. While strides are currently underway to mitigate the environmental impacts of healthcare, less is known about how health researchers are addressing these issues, if at all.

METHODS

This paper uses an interview methodology to explore the attitudes of UK health researchers using data-intensive methodologies about the adverse environmental impacts of their practices, and how they view the importance of these considerations within wider health goals.

RESULTS

Interviews with 26 researchers showed that participants wanted to address the environmental and related health harms associated with their research and they reflected on how they could do so in alignment with their own research goals. However, when tensions emerged, their own research was prioritised. This was related to their own desires as researchers and driven by the broader socio-political context of their research endeavours.

CONCLUSION

To help mitigate the environmental and health harms associated with data-intensive health research, the socio-political context of research culture must be addressed.

What a Waste! The Impact of Unused Surgical Supplies in Hand Surgery and How We Can Improve

BACKGROUND

The US health care system is the second largest contributor of trash. Approximately 20% to 70% of waste is produced by operating rooms, and very few of this waste is recycled. The purpose of this study is to quantify the opened but unused disposable supplies and generate strategies to reduce disposable waste.

METHODS

A single-center prospective study to evaluate the cost of opened but unused single-use operating room supplies was completed by counting the number of wasted disposable products at the end of hand surgery cases. We used χ2 test, t test, Wilcoxon rank-sum test, and simple linear regression to assess the associations between patient and case variables and the total cost of wasted items. Environmentally Extended Input Output Life Cycle Assessment methods were used to convert the dollar spent to kilograms of carbon dioxide equivalent (CO2-e), a measure of greenhouse gas emissions.

RESULTS

Surgical and dressing items that were disposed of and not used during each case were recorded. We included 85 consecutive cases in the analysis from a single surgeon's practice. Higher cost from wasted items was associated with shorter operative time (P = .010). On average, 11.5 items were wasted per case (SD: 3.6 items), with a total of 981 items wasted over the 85 cases in the study period. Surgical sponges and blades were 2 of the most unused items. Wasted items amounted to a total of $2193.5 and 441 kg of CO2-e during the study period.

CONCLUSIONS

This study highlights the excessive waste of unused disposable products during hand surgery cases and identifies ways of improvement.

Single-use versus reusable metallic laryngoscopes for non-emergent intubation: A retrospective review of 72,672 intubations

STUDY OBJECTIVE

Increased regulatory requirements for sterilization in recent years have prompted a widespread transition from reusable to single-use laryngoscopes. The purpose of this study was to determine if the transition from metallic reusable to metallic single-use laryngoscopes impacted the performance of direct laryngoscopy at an academic medical center.

DESIGN

Single-site retrospective cohort study.

SETTING

General anesthetic cases requiring tracheal intubation.

PATIENTS

Adult patients undergoing non-emergent procedures.

INTERVENTIONS

Data were collected two years before and two years after a transition from metallic reusable to metallic single-use laryngoscopes.

MEASUREMENTS

The primary outcome was need for intubation rescue with an alternate device. Secondary outcomes were difficult laryngeal view (modified Cormack-Lehane grade ≥ 2b) and hypoxemia (SpO2 < 90% for >30 s) during direct laryngoscopy intubations. Subgroup analyses for rapid sequence induction, Macintosh blades, Miller blades, and patients with difficult airway risk factors (Obstructive Sleep Apnea, Mallampati ≥3, Body Mass Index >30 kg/m2) were performed.

MAIN RESULTS

In total, 72,672 patients were included: 35,549 (48.9%) in the reusable laryngoscope cohort and 37,123 (51.1%) in the single-use laryngoscope cohort. Compared with reusable laryngoscopes, single-use laryngoscopes were associated with fewer rescue intubations with an alternate device (covariates-adjusted odds ratio [OR] 0.81 95% CI 0.66-0.99). Single-use laryngoscopes were also associated with lower odds of difficult laryngeal view (OR 0.86; 95% CI 0.80-0.93). Single use laryngoscopes were not associated with hypoxemia during the intubation attempt (OR 1.03; 95% CI 0.88-1.20). Similar results were observed for subgroup analyses including rapid sequence induction, Macintosh blades, Miller blades, and patients with difficult airway risk factors.

CONCLUSIONS

Metallic single-use laryngoscopes were associated with less need for rescue intubation with alternate devices and lower incidence of poor laryngeal view compared to reusable metallic laryngoscopes.

Climate Change, Air Quality, and Pulmonary Health Disparities

Climate change will alter environmental risks that influence pulmonary health, including heat, air pollution, and pollen. These exposures disproportionately burden populations already at risk of ill health, including those at vulnerable life stages, with low socioeconomic status, and systematically targeted by oppressive policies. Climate change can exacerbate existing environmental injustices by affecting future exposure, as well as through differentials in the ability to adapt; this is compounded by disparities in rates of underlying disease and access to health care. Climate change is therefore a dire threat not only to individual and population health but also to health equity.

Enhancing cardiometabolic health through physical activity and breakfast manipulations in children and adolescents: good for humans, good for the planet

The human health benefits of cardiometabolic disease prevention can be accompanied by planetary co-benefits. Focusing efforts towards young people, including children and adolescents, is conducive to disease prevention. In the context of cardiometabolic disease prevention, this review paper critically summarises the available literature on the acute cardiometabolic responses to physical activity and breakfast manipulations among young people. Given the seriousness of global climate change, which will disproportionally affect our younger generations, this review paper offers new insights into the inherent interactions between child-adolescent behaviour and cardiometabolic health from an environmental sustainability perspective to aid climate change mitigation efforts, including exploring future research avenues. A growing evidence base suggests acute moderate- to high-intensity exercise bouts can attenuate postprandial plasma glucose, insulin and triacylglycerol concentrations for up to 24-48 h in young people. Whether accumulating physical activity throughout the day with short, frequent bouts promotes cardiometabolic risk marker attenuations is unclear. Breakfast consumption may enhance free-living physical activity and reduce glycaemic responses to subsequent meals for a possible additive impact. If repeated habitually, attenuations in these cardiometabolic risk factors would be conducive to disease prevention, reducing the greenhouse gas emissions associated with disease diagnosis and treatment. To progress current understanding with high public health and planetary relevance, research among samples of 'at risk' young people that span cellular-level responses to ecologically valid settings and address human and planetary health co-benefits is needed. Indeed, certain physical activity opportunities, such as active travel to school, offer important direct co-benefits to humans and planetary health.

Alternative Trastuzumab Dosing Schedules Are Associated With Reductions in Health Care Greenhouse Gas Emissions

PURPOSE

Cancer care-related greenhouse gas (GHG) emissions harm human health. Many cancer drugs are administered at greater-than-necessary doses, frequencies, and durations. Alternative dosing strategies may enable reductions in cancer care GHG emissions without compromising patient outcomes.

MATERIALS AND METHODS

We used streamlined life-cycle analysis in a case-control simulation to estimate the relative reductions in GHG emissions that would be expected to result from using each of three alternative dosing strategies of trastuzumab (6-month adjuvant treatment duration, once every 4-week dosing, and both) in human epidermal growth factor receptor 2 (HER2)+ breast cancer. Using primary data and conversion factors from the environmental science literature, we estimated per-patient relative reduction in GHG emissions and, using SEER data, health impacts (in terms of disability-adjusted life-years [DALYs] and excess mortality per kg CO2) on bystanders for each alternative dosing strategy.

RESULTS

Compared with the trastuzumab dosing strategy commonly used at baseline (12-month duration of adjuvant therapy and once every 3-week dosing in all settings), adoption of both 6-month adjuvant trastuzumab and once every 4-week trastuzumab dosing would reduce GHG emissions by 4.5%, 18.7%, and 14.6% in the neoadjuvant, adjuvant, and metastatic settings, respectively. We estimate that US-based adoption of alternative trastuzumab dosing would reduce annual DALYs and excess lives lost due to environmental impact of US-based trastuzumab therapy for HER2+ breast cancer by 1.5 and 0.9, respectively.

CONCLUSION

Alternative dosing strategies may materially reduce the population health impacts of cancer care by reducing environmental impact. Regulatory decision making and health technology assessments should consider a treatment's environmental and population health impacts. Clinical trials of alternative dosing strategies are justified on the basis of environmental and population health impacts.

[Survey and reduction of waste production from eye surgery]

BACKGROUND

The health sector is facing new challenges due to the impact of climate change on health. At the same time, it significantly contributes to our society's climate footprint. Hospitals producing considerable amounts of waste are an important aspect of this burden. The aim of this work was to quantify the amount of waste produced by eye surgery and, as an optimization measure, to evaluate the effect of glass separation from residual waste.

MATERIAL AND METHODS

Over a 2-week period, the waste generated by eye operations in the surgical theater of our university hospital was measured. Another 2‑week long measurement was conducted after the initiation of glass separation from general waste. The data obtained allowed a comparison of the two periods, the type of waste (residual and recyclable) as well as the type of operation (intraocular, extraocular). Considering regional waste disposal costs, an economic comparison was also performed.

RESULTS

In the first measurement period (196 operations), a total of 549.6 kg of waste was generated, 87% (478.3 kg) of which was residual waste, corresponding to 14.3 tons of total waste annually. Intraocular procedures generated on average 80% more waste than extraocular procedures: 18.1 ± 3.9 kg and 11.4 ± 4.0 kg, respectively, per day and theater. Separation of glass from residual waste reduced its quantity by 7.2% in the second measurement period (197 procedures). As the disposal of glass is free of charge in the city of Essen, this resulted in a small economic advantage (extrapolated to 112 € per year).

CONCLUSION

The amount of waste generated by ophthalmic surgery is substantial, with a predominant proportion of non-recyclable residual waste. Intraocular operations are the cause of the majority of the waste produced. Simple measures, such as disposing of glass separately, are helpful and inexpensive to reduce the quantity of residual waste.

Carbon footprints in minimally invasive surgery: Good patient outcomes, but costly for the environment

Advancements in technology and surgical training programs have increased the adaptability of minimally invasive surgery (MIS). Gastrointestinal MIS is superior to its open counterparts regarding post-operative morbidity and mortality. MIS has become the first-line surgical intervention for some types of gastrointestinal surgery, such as laparoscopic cholecystectomy and appendicectomy. Carbon dioxide (CO2) is the main gas used for insufflation in MIS. CO2 contributes 9%-26% of the greenhouse effect, resulting in global warming. The rise in global CO2 concentration since 2000 is about 20 ppm per decade, up to 10 times faster than any sustained rise in CO2 during the past 800000 years. Since 1970, there has been a steady yet worrying increase in average global temperature by 1.7 °C per century. A recent systematic review of the carbon footprint in MIS showed a range of 6-814 kg of CO2 emission per surgery, with higher CO2 emission following robotic compared to laparoscopic surgery. However, with superior benefits of MIS over open surgery, this poses an ethical dilemma to surgeons. A recent survey in the United Kingdom of 130 surgeons showed that the majority (94%) were concerned with climate change but felt that the lack of leadership was a barrier to improving environmental sustainability. Given the deleterious environmental effects of MIS, this study aims to summarize the trends of MIS and its carbon footprint, awareness and attitudes towards this issue, and efforts and challenges to ensuring environmental sustainability.

Strong Sustainability of Medical Technologies: A Medical Taboo? The Case of Disposable Endoscopes

This paper aims to question the sustainability of biomedical engineering practices. The strong sustainability framework is applied to the evaluation and development of medical technologies through the definition of clinical sustainability. A roadmap for developing and evaluating medical technologies in this respect is derived from this framework, as a first step toward a multidisciplinary evaluation tool. On this basis, the current trend towards disposable endoscopes is analyzed and discussed. This highlights the subtle balance between economic, clinical, social, and environmental factors, the lack of evidence at these multiple levels, and the need for multidisciplinarity. This paper concludes with the need to assess all aspects of sustainability and identify and quantify the trade-offs, instead of focusing on one or two key indicators, to have more relevant information in order to make better and more effective decisions. Towards sustainable healthcare, we outline two paths of action: (1) providing evidence that is lacking on the environmental impact of existing or currently developed medical technologies and (2) clarifying the premises and visions underlying our practices.Clinical Relevance- This work provides insights regarding the strong sustainability of medical technologies. This clinical framework may help clinicians and developers in decision-making to reduce indirect negative ecological, social, and health impacts.

Project SPRUCE: Saving Our Planet by Reducing Carbon Emissions, a Pediatric Anesthesia Sustainability Quality Improvement Initiative

BACKGROUND

Children are particularly vulnerable to adverse health outcomes related to climate change. Inhalational anesthetics are potent greenhouse gasses (GHGs) and contribute significantly to health care-generated emissions. Desflurane and nitrous oxide have very high global warming potentials. Eliminating their use, as well as lowering fresh gas flows (FGFs), will lead to reduced emissions.

METHODS

Using published calculations for converting volatile anesthetic concentrations to carbon dioxide equivalents (CO 2 e), we derived the average kilograms (kg) CO 2 e/min for every anesthetic administered in the operating rooms at our pediatric hospital and ambulatory surgical center between October 2017 and October 2022. We leveraged real-world data captured from our electronic medical record systems and used AdaptX to extract and present those data as statistical process control (SPC) charts. We implemented recommended strategies aimed at reducing emissions from inhalational anesthetics, including removing desflurane vaporizers, unplugging nitrous oxide hoses, decreasing the default anesthesia machine FGF, clinical decision support tools, and educational initiatives. Our primary outcome measure was average kg CO 2 e/min.

RESULTS

A combination of educational initiatives, practice constraints, protocol changes, and access to real-world data were associated with an 87% reduction in measured GHG emissions from inhaled anesthesia agents used in the operating rooms over a 5-year period. Shorter cases (<30 minutes duration) had 3 times higher average CO 2 e, likely due to higher FGF and nitrous oxide use associated with inhalational inductions, and higher proportion of mask-only anesthetics. Removing desflurane vaporizers corresponded with a >50% reduction of CO 2 e. A subsequent decrease in anesthesia machine default FGF was associated with a similarly robust emissions reduction. Another significant decrease in emissions was noted with educational efforts, clinical decision support alerts, and feedback from real-time data.

CONCLUSIONS

Providing environmentally responsible anesthesia in a pediatric setting is a challenging but achievable goal, and it is imperative to help mitigate the impact of climate change. Large systems changes, such as eliminating desflurane, limiting access to nitrous oxide, and changing default anesthesia machine FGF rates, were associated with rapid and lasting emissions reduction. Measuring and reporting GHG emissions from volatile anesthetics allows practitioners to explore and implement methods of decreasing the environmental impact of their individual anesthesia delivery practices.

How Ophthalmologists Can Decarbonize Eye Care: A Review of Existing Sustainability Strategies and Steps Ophthalmologists Can Take

TOPIC

Understanding approaches to sustainability in cataract surgery and their risks and benefits.

CLINICAL RELEVANCE

In the United States, health care is responsible for approximately 8.5% of greenhouse gas (GHG), and cataract surgery is one of the most commonly performed surgical procedures. Ophthalmologists can contribute to reducing GHG emissions, which lead to a steadily increasing list of health concerns ranging from trauma to food instability.

METHODS

We conducted a literature review to identify the benefits and risks of sustainability interventions. We then organized these interventions into a decision tree for use by individual surgeons.

RESULTS

Identified sustainability interventions fall into the domains of advocacy and education, pharmaceuticals, process, and supplies and waste. Existing literature shows certain interventions may be safe, cost-effective, and environmentally friendly. These include dispensing medications at home to patients after surgery, multi-dosing appropriate medications, training staff to properly sort medical waste, reducing the number of supplies used during surgery, and implementing immediate sequential bilateral cataract surgery where clinically appropriate. The literature was lacking on the benefits or risks for some interventions, such as switching specific single-use supplies to reusables or implementing a hub-and-spoke-style operating room setup. Many of the advocacy and education interventions have inadequate literature specific to ophthalmology but are likely to have minimal risks.

CONCLUSIONS

Ophthalmologists can engage in a variety of safe and effective approaches to reduce or eliminate dangerous GHG emissions associated with cataract surgery.

FINANCIAL DISCLOSURE(S)

Proprietary or commercial disclosure may be found after the references.

The association between ambient temperature and antimicrobial resistance of Klebsiella pneumoniae in China: a difference-in-differences analysis

Introduction

Antimicrobial resistance (AMR) of Klebsiella pneumoniae (K. pneumoniae) poses a significant global public health threat and is responsible for a high prevalence of infections and mortality. However, knowledge about how ambient temperature influences the AMR of K. pneumoniae is limited in the context of global warming.

Methods

AMR data of 31 Chinese provinces was collected from the China Antimicrobial Resistance Surveillance System (CARSS) between 2014 and 2020. Socioeconomic and meteorological data were collected from the China Statistical Yearbook during the same period. A modified difference-in-differences (DID) approach was applied to estimate the association between ambient temperature and third-generation cephalosporin-resistant K. pneumoniae (3GCRKP) and carbapenem-resistant K. pneumoniae (CRKP). Furthermore, moderating effects of socioeconomic factors were also evaluated.

Results

Every 1°C increase in annual average temperature was associated with a 4.7% (relative risk (RR):1.047, 95% confidence intervals (CI): 1.031-1.082) increase in the detection rate of 3GCRKP, and a 10.7% (RR:1.107, 95% CI: 1.011-1.211) increase in the detection rate of CRKP. The relationships between ambient temperature and 3GCRKP and CRKP were found to be moderated by socioeconomic status (GDP per capita, income per capita, and consumption per capita; the interaction p-values <0.05), where higher economic status was found to strengthen the effects of temperature on the detection rate of 3GCRKP and weaken the effects on the detection rate of CRKP.

Discussion

Ambient temperature was found to be positively associated with AMR of K. pneumoniae, and this association was moderated by socioeconomic status. Policymakers should consider the impact of global warming and high temperatures on the spread of 3GCRKP and CRKP when developing strategies for the containment of AMR.

Reimagining research ethics to include environmental sustainability: a principled approach, including a case study of data-driven health research

In this paper we argue the need to reimagine research ethics frameworks to include notions of environmental sustainability. While there have long been calls for healthcare ethics frameworks and decision-making to include aspects of sustainability, less attention has focused on how research ethics frameworks could address this. To do this, we first describe the traditional approach to research ethics, which often relies on individualised notions of risk. We argue that we need to broaden this notion of individual risk to consider issues associated with environmental sustainability. This is because research is associated with carbon emissions and other environmental impacts, both of which cause climate change health hazards. We introduce how bioethics frameworks have considered notions of environmental sustainability and draw on these to help develop a framework suitable for researchers. We provide a case study of data-driven health research to apply our framework.

Potential environmental effect of reducing the variation of disposable materials used for cataract surgery

PURPOSE

To analyze the cataract package variability in 1 country, Austria.

SETTING

Austrian Departments of Ophthalmology.

DESIGN

Cross-sectional study.

METHODS

The cataract package components of 3 different Austrian hospitals were weighed and life cycle assessment on each product performed. This data was then extrapolated to the sales figures of the main Austrian cataract package suppliers to estimate the carbon footprint of all cataract packages used in Austria in 2021.

RESULTS

There were 55 different cataract package compositions in use with an average weight of 0.7 kg. These compositions differ significantly in weight and composition considering that the smallest package was 57% lighter than the largest package. The size of the surgical drapes also showed considerable variation, with a difference of up to 71%. This is substantial, considering that drapes and covers account for about 53% of the package weight.

CONCLUSIONS

There was a considerable variation in package composition and product size, which could provide opportunities to save carbon dioxide emissions in cataract surgery. If all Austrian eye departments were to reduce the material quantities and drape sizes to the lower third of the cataract packages used in the Austria in 2021, cataract package associated CO 2 emissions could be reduced by 34%.