The greenest exchange: Environmental stewardship in peritoneal dialysis

Welcome to AudioScholar. Today we're covering "The greenest exchange: Environmental stewardship in peritoneal dialysis," an editorial by Drs. Meera Shah and Jeffrey Perl, published in a 2026 issue of *Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis*.

CLINICAL CONTEXT

As clinicians, we're acutely aware of the health consequences of climate change. But what’s often less discussed is the environmental footprint of healthcare itself. Globally, the healthcare sector is responsible for about 5% of all greenhouse gas emissions—that's nearly triple the contribution of the entire aviation industry.

Within medicine, nephrology is one of the most resource-intensive fields. Kidney replacement therapies generate substantial waste, consume large amounts of water and energy, and rely on complex global supply chains. This creates a challenging cycle: climate change can worsen chronic kidney disease through heat stress and extreme weather events, while the very treatments we provide contribute to the underlying environmental problem. This editorial argues that sustainability in kidney care is no longer a peripheral issue, but a core ethical and clinical responsibility.

STUDY DESIGN

This paper is not a traditional research study, but rather an editorial that frames a special "Green Issue" of its journal. The authors, Shah and Perl, synthesize the findings from several articles within that issue to build a comprehensive case for improving the environmental sustainability of peritoneal dialysis, or PD.

The editorial's approach is to highlight practical and innovative pathways to reduce the environmental footprint of PD. It draws on evidence from a variety of sources discussed in the issue, including a structured review, a short report on packaging waste, an original article quantifying the impact of different PD protocols, and another exploring the futuristic concept of effluent reuse. The purpose is to move the conversation from abstract concern to concrete action, showcasing real-world examples and emerging research to guide the nephrology community.

KEY FINDINGS

The editorial starts by acknowledging that peritoneal dialysis already has a lower carbon footprint than in-center hemodialysis. This is largely due to it being a home-based therapy, which avoids the emissions associated with patient transport and the high energy and water consumption of a dialysis center. However, the authors stress that PD is far from environmentally benign, with the main contributors being the manufacturing, packaging, and transport of consumables—especially single-use plastics.

The authors then highlight several key areas for improvement, using specific studies from the journal issue as examples.

First, lean resource management. A short report by Ghimire and colleagues provides a striking example of system-level waste. They examined the use of icodextrin for automated peritoneal dialysis, or APD, in Canada. They found that only 2.5-liter bags are commercially available, even though the average prescribed fill volume in their cohort was just 1.2 liters. This mismatch means that approximately 50% of the icodextrin dialysate is discarded before it's even used. This generates unnecessary polyvinyl chloride, or PVC, plastic waste and significant financial costs—all stemming from a simple lack of appropriately sized packaging.

Second, the editorial discusses the impact of clinical protocols. An original article by Nicdao and colleagues quantified the environmental difference between incremental PD and standard full-dose therapy. Incremental PD, where patients start on a lower dose of dialysis that is later titrated up as residual kidney function declines, is a patient-centered approach. Using life-cycle modeling, the study demonstrated that this approach also has significant environmental benefits. Compared to starting with full-dose therapy, incremental PD was associated with lower carbon emissions, reduced water consumption, and less waste generation. This finding powerfully links a clinically appropriate, patient-first strategy with a more sustainable practice.

Third, the authors touch on patient empowerment. Patients on PD are uniquely positioned to see the material footprint of their therapy every single day, as cardboard boxes and plastic bags accumulate in their homes. The editorial highlights an image from the journal showing a patient who ingeniously reused empty plastic PD bags to build a fence. While not a scalable solution, it illustrates the awareness and motivation that many patients have to reduce waste. The authors argue that clinicians should view patients as key partners in sustainability efforts, empowering them through education and support for waste reduction and recycling where possible.

Finally, the editorial looks to the future with the concept of effluent reuse. A study by Cruz-Cruz and colleagues explored the feasibility of repurposing the dialysate effluent drained from the patient. Their biochemical and microbiological analyses suggested that with proper treatment, the effluent could potentially be safe for non-potable uses, such as flushing toilets or irrigating gardens. While the authors acknowledge that significant logistical and purification challenges remain, they present this as a critical first step toward creating a more circular resource model in kidney care, where waste from one process becomes a resource for another.

STRENGTHS AND LIMITATIONS

The primary strength of this editorial is its effective synthesis. It weaves together diverse research—from packaging logistics to effluent chemistry—into a single, compelling narrative. By grounding its arguments in specific, data-driven examples, it makes the abstract concept of "green nephrology" tangible and actionable for a clinical audience. It successfully frames environmental stewardship not as an extra burden, but as an integral part of providing high-quality, ethical patient care.

Limitations

As an editorial, the paper's main purpose is to present a perspective and a call to action, not to generate new primary data. Its conclusions are therefore dependent on the quality and generalizability of the individual studies it cites. The editorial highlights promising strategies, but it also acknowledges that many of the systemic barriers—such as inconsistent municipal recycling infrastructure and industry-wide packaging standards—are complex and beyond the control of individual clinicians or patients. It raises awareness of the problems but, by necessity, cannot provide all the solutions.

CLINICAL BOTTOM LINE

For practicing physicians, the key takeaway is that environmental sustainability should be part of our clinical decision-making framework. This doesn't mean compromising patient care; in fact, it often aligns with it.

First, be aware of the environmental impact of prescribing choices. This includes not just the therapy itself, but the associated waste from packaging and supplies. The icodextrin example shows how seemingly small details can have a large cumulative impact.

Second, consider clinical models that are both patient-centered and environmentally friendlier. The data on incremental PD suggests that aligning therapy with a patient's residual kidney function is a win-win for both the patient and the planet.

Finally, the editorial encourages us to advocate for change. This can happen at the local level, by working with hospitals to improve waste management, and at a broader level, by engaging with industry partners to demand more sustainable product design, less packaging, and more environmentally friendly materials. The journey to sustainable kidney care is a collective one, and this editorial makes a strong case that nephrologists must help lead the way.

That's your AudioScholar summary. The full transcript and reference are on the episode page. This is an AI-generated summary — for clinical decisions, always consult the primary source. Until next time.