POCUS for Low-Carbon Diagnostics: A Comprehensive, Lifecycle-Based Perspective

Point-of-care ultrasound (POCUS) offers a low-carbon, cost-effective diagnostic pathway. Compared with CT and MRI, it uses far less energy, needs minimal infrastructure and avoids many transfers, cutting emissions. Greener gels, reusable covers and take-back or refurbishment cut waste. Leadership, green procurement and staff behaviours embed gains, while bedside access supports equity and faster decisions.

Key Points

• POCUS has far lower energy use than CT and MRI across its lifecycle.
• Bedside scans cut transfers, speeding decisions and reducing emissions.
• Greener gels and reusable covers significantly reduce plastic waste.
• Refurbishment and take-back programmes lower device lifecycle carbon.
• Leadership, procurement and staff behaviours embed sustainable practice.

Introduction

Hospital leaders and frontline clinicians are increasingly compelled to address the urgent need for sustainable healthcare delivery. The environmental cost of modern diagnostics is significant: imaging services alone contribute substantially to the healthcare industry’s share of global greenhouse gas emissions, which stands at approximately 4.4 percent (United Nations Climate Action 2023). The operational realities of delivering advanced care in resource-constrained times call for innovation not only in technology, but in the manner in which diagnostics are chosen and deployed (Rodríguez-Jiménez et al. 2023). Within this landscape, point-of-care ultrasound (POCUS) has emerged as a transformative solution; it is now a mainstay in critical care, emergency and general medicine, and increasingly recognised as a model for combining clinical effectiveness with environmental stewardship.

Modern POCUS in Clinical Practice

POCUS enables clinicians to answer focused diagnostic questions at the patient’s bedside within a matter of minutes, without the logistical, radiation, staffing and cost barriers imposed by traditional imaging modalities. The value of this technology is apparent in modern high-dependency units, where POCUS facilitates rapid assessment of cardiac tamponade, pleural effusions, abdominal aortic aneurysms, deep venous thrombosis and provides procedural guidance for vascular access, all at the bedside (Choi et al. 2023). Such immediate access profoundly improves clinical response times and patient safety, as exemplified by cases where deteriorating patients benefit from crucial interventions made possible by the prompt diagnoses using POCUS. These advances extend far beyond acute hospital settings. In rural clinics and developing health systems, the portability and affordability of POCUS democratise access to advanced diagnostics, supporting health equity and empowering clinicians to deliver high-quality care even in the absence of CT or MRI resources (Marín-Gomez et al. 2020). The benefit is evident not only in patient outcomes but in workflow efficiency, with reductions in unnecessary transfers, timely clinical decisions and better use of hospital resources driving improvements across diverse healthcare environments (Shokoohi et al. 2025).

Sustainability and Environmental Benefits of POCUS

The case for POCUS as a cornerstone of sustainable healthcare is compelling when its full lifecycle is considered. Unlike radiology modalities such as CT or MRI, which require extensive infrastructure, continuous high-power operation and complex supply chains for consumables and parts, POCUS offers a dramatically reduced environmental footprint at every stage, from raw material extraction to operational use and eventual decommissioning (Table 1) (Schoen et al. 2021).

One of the defining environmental advantages of POCUS is its inherently low energy demand. Studies comparing ICU and radiology device power consumption reveal that ultrasound machines, even during active scanning, draw between 182 and 415 watts, resulting in annual usage of approximately 350 to 1,100 kWh per unit. By comparison, a single MRI suite operates at over 214 kWh per day, more than many POCUS systems use in a year. CT and X-ray imaging also consume more energy than POCUS. Even routine clinical workflows compound savings: powering down idle POCUS devices when not in use can deliver immediate energy and carbon savings of 3 to 16 percent annually, simply by changing staff behaviour and protocols. This means that, even without investing in new technology, hospitals can reduce costs and emissions by encouraging conscientious device management (Hainc et al. 2020; GE n. d.; Mindray n. d.).

The sustainability benefits continue at the infrastructure level. POCUS devices are mobile or handheld, requiring only standard electrical outlets, and are instantly deployable in wards, ambulances, rural clinics or disaster response units. In stark contrast, CT and MRI modalities require purpose-built, shielded rooms, specialist electrical installations, Heating, Ventilation and Air Conditioning (HVAC systems), and even cryogenics infrastructure for MRI. These construction requirements represent a substantial source of embodied carbon, with a single suite build estimated to generate up to 30 tons of CO₂ even before delivering any patient care (Roletto et al. 2024; Furletto et al. 2023). When hospitals delay or avoid such construction by relying more on POCUS, emissions from material sourcing and site development are markedly reduced.

Consumables management is another frontier for environmental progress in POCUS (Gaetani et al. 2024). The majority of gel and probe covers are currently single-use, with strict protocols for shelf-life and disposal to prevent infection risks. This creates considerable plastic waste, most of which is not recyclable. Hospitals that have piloted biodegradable gels and reusable probe covers have reported a reduction in gel-related plastic waste of up to 30 percent, with probe cover waste halved simply through rigorous adherence to protocols and high-level disinfection procedures. The challenge of balancing infection control and waste reduction is ongoing, but these interventions, alongside waste audits and green procurement strategies, are essential for aligning clinical excellence with environmental stewardship.

Even the end-of-life phase for POCUS devices reveals sustainability opportunities. Medical electronics form a disproportionately large source of toxic landfill waste, yet well-managed recycling programmes can reclaim up to 95 percent of valuable metals found in obsolete ultrasound systems, while reducing greenhouse gas emissions associated with new mining. Remanufacturing and refurbishment, practices promoted by manufacturers such as Philips and Butterfly Network, conservatively lower the total lifecycle carbon footprint of the device by 40 to 60 percent, a change that multiplies when applied hospital-wide (Ultrasound trainers 2025). Regulatory frameworks such as Waste Electrical and Electronic Equipment (WEEE) and local hazardous waste laws not only mandate responsible disposal but can incentivise the adoption of take-back programmes, circular procurement and formal staff training in e-waste segregation.

A final, but critical, environmental benefit of POCUS is its effect on health system operations. By facilitating bedside imaging, POCUS eliminates potentially unnecessary patient transfers to radiology, a factor that has been shown to save hundreds of porter-hours, remove thousands of litres of fuel use from hospital transport fleets (Shokoohi 2025) and prevent a quantifiable amount of air pollution, especially in resource-limited and rural areas. The ability to provide rapid diagnostics without centralised imaging bottlenecks shortens patient stays, reduces demand for repeated or excessive tests and streamlines treatment, all of which contribute to reducing the cumulative environmental and financial burden of hospital care.

Overall, the adoption of POCUS is both a pragmatic and morally responsible strategy for hospitals seeking to reduce their climate impact. By prioritising device usage protocols, investing in sustainable consumables, engaging wholeheartedly in circular economy models and embedding environmental performance metrics into procurement and practice, healthcare institutions can positively impact their total greenhouse emissions, waste and resource consumption, without compromising patient outcomes or safety. The path to decarbonised healthcare is not entirely technical, but a journey of incremental, system-level change; POCUS provides a model for how targeted diagnostic innovation can facilitate this transition.

Policy, Implementation and Practice

Leadership and institutional commitment are central to optimising sustainable practice in healthcare imaging. Green procurement policies must account for lifecycle disclosures, recycled and recyclable content, and take-back programmes for all new device purchases, while performance dashboards should integrate carbon, waste, energy and utilisation metrics alongside clinical indicators. Collaborative relationships with major suppliers can  ensure continual advances in eco-friendly packaging and repairability, thereby enhancing the longevity and sustainability of device fleets.

Behavioural and organisational change are as important as technical solutions. Education campaigns focused on best practices for device use, cleaning and energy management underpin significant savings in both carbon and costs, especially when combined with continuous audit and feedback loops (Figure 3). Initiatives such as “POCUS champions” in the ICU, frontline clinicians tasked with driving Quality Improvement (QI) and sustainable practice, can effect change and maintain momentum through peer leadership and staff engagement. Moreover, embedding sustainability as part of the hospital mission fosters a culture where waste reduction and environmental responsibility are not exceptional but routine.

Infection control remains a priority. The adoption of biodegradable and reusable consumables must be predicated on rigorous evidence of non-inferiority with respect to sterility and patient safety. Mandatory single-use protocols, especially during infectious disease outbreaks, can however temporarily override sustainability objectives.

Financial Analysis and Cost-Benefit

Financial case studies provide compelling support for increasing POCUS use from an economic perspective. Device acquisition costs for POCUS systems range from £2,000 (€2,270) to £30,000 (€34,100); CT costs over £700,000 (€795,000) and MRI over £1 million (€1,135,000) in contrast, with additional expenses for construction and maintenance. Daily operation of POCUS, particularly when coupled with energy-saving protocols, further curtails costs, with systematic device power-downs yielding savings equivalent to the cost of two ICU beds per year. Consumables reform, such as the transition to sustainable gel packs and probe covers, has generated annual savings of up to £17,000 (€19,300) per hospital ICU (local estimate), while manufacturer refurbishment and subscription models reduce capital expenditure and manage end-of-life waste without financial penalty (Badanta 2025).

Health Equity and System-Level Impact

The impact of POCUS on health equity is profound. Its ease of use, portability and affordability ensure that essential diagnostics are made available in community clinics, ambulances and healthcare centres in both resource-rich and resource-poor settings. POCUS enables patients to receive timely care while minimising the health risks or logistical barriers inherent to hospital transfers for imaging. In aggregate, these system-level efficiencies support sustainable, high-quality care as an attainable goal for diverse populations.

Opportunities and Research Needs

Ongoing research and policy development are necessary to maintain progress in sustainable imaging. QI projects that focus on green consumable pilot deployment, energy reduction audits, infection prevention and waste analytics will inform best practices and inspire innovation. Procurement decisions supported by comprehensive lifecycle analysis, strict environmental clauses and collaborative partnerships with manufacturers ensure that sustainability is prioritised in all purchasing activities. National strategic alignment, such as NHS net-zero (NHS England n. d.), further grounds these objectives in collective action and continuous improvement.

Limitations of POCUS

POCUS has several key limitations, including its strong dependence on operator skill and training, which can lead to variable image quality and interpretation, especially among novice users or those without formal education in ultrasound techniques. Additionally, POCUS is inherently limited by the focused nature of its protocols, which may miss incidental findings detectable by comprehensive imaging, and there is a risk of confirmation bias during rapid bedside assessments. Inconsistent training standards and a lack of standardised protocols contribute further to variability in examination quality, while misinterpretation of findings can lead to inappropriate clinical decisions if not integrated with the overall clinical context. Finally, logistic and systemic issues such as equipment costs, time constraints in busy settings and low reimbursement can hinder widespread adoption of POCUS in clinical practice.

Conclusion: From Bedside Scan to Sustainable System

POCUS exemplifies how environmental responsibility can be embedded within hospital care, delivering timely, effective and sustainable patient care. Leaders who champion POCUS adoption are committing to clinical excellence, operational resilience and stewardship of natural resources in an industry known for producing significant waste. The time for action is now, from the executive suite and procurement offices right down to the patient’s bedside.

Conflict of Interest

None.