RAASi Preservation: Qualitative Analysis of Hyperkalaemia

This post explains how the PLOS ONE qualitative study published on July 30, 2026, examined Spanish nephrologists' approaches to hyperkalaemia and RAASi preservation and what that means for qualitative research workflows. Evidano is an AI-powered qualitative data analysis platform that helps researchers analyze interviews, open-ended surveys, and documents. According to the PLOS ONE study, twelve nephrologists were interviewed in October 2025 and the authors report a five-theme structure to clinician decision-making, access barriers, and patient experience.

Key Takeaways

Answer: According to the PLOS ONE study, nephrologists in Spain prioritise preserving RAASi therapy and use a stepwise approach to hyperkalaemia that increasingly relies on newer potassium binders but is constrained by access and coordination barriers (PLOS ONE).

12 nephrologists were interviewed in October 2025, with interviews averaging 53 minutes, as reported in PLOS ONE on July 30, 2026.
75% of participants in the PLOS ONE sample had more than 15 years of clinical experience, and binder use in the prior 12 months was split 50/50 between patiromer and sodium zirconium cyclosilicate (SZC).
Nephrologists in the PLOS ONE study described five themes: structured stepwise management, newer binders as enablers, system-level access friction, nursing-led patient engagement, and limited formal HRQoL measurement.

What happened in the PLOS ONE study and how it was measured

Answer: The PLOS ONE study used semi-structured interviews with practising nephrologists in Spain to characterise real-world hyperkalaemia management and RAASi decision-making.

According to PLOS ONE, the study prospectively recruited 12 nephrologists from six autonomous communities and conducted interviews in October 2025, transcribing sessions verbatim and analysing them with ATLAS.ti using a codebook-based thematic analysis.

According to PLOS ONE, analysis produced 30 final codes that were organised into 15 sub-themes and five overarching themes; the sample was purposive, stopped when no new concepts emerged, and followed COREQ standards.

Findings Snapshot

Date	Metric	Value	Implication
October 2025	Interviews conducted	12 nephrologists, average 53 min	Qualitative depth adequate to reach data sufficiency per authors
July 30, 2026	Publication	PLOS ONE research article	Peer-reviewed open access source for clinician perspectives
Past 12 months (per participants)	Prescribing experience	50% patiromer, 50% SZC	Newer binders widely trialled among interviewed clinicians
Participant experience	Years in practice	75% >15 years	Sample skewed to experienced specialists; interpret views as expert perspectives

Implications for clinical researchers and qualitative teams

Answer: The PLOS ONE findings imply that qualitative researchers should capture administrative, multidisciplinary, and patient-experience data when studying medication access and adherence.

According to PLOS ONE, systemic features such as visado prior authorisation and regional formulary variation were repeatedly cited by nephrologists as limiting timely use of newer potassium binders, so qualitative protocols should include prompts and documentary sampling for policy-level artefacts.

According to PLOS ONE, patient quality-of-life effects were discussed by clinicians but rarely measured formally, so research designs should incorporate patient-reported outcome measures (PROMs) and nursing perspectives to triangulate clinician accounts.

How Evidano helps translate PLOS ONE-style qualitative studies into reproducible insights

Problem: small-sample interviews produce dispersed codes that are hard to summarise

Answer: The problem is that code proliferation and manual aggregation slow synthesis and reduce reproducibility.

Solution: Evidano is an AI-powered qualitative data analysis platform that helps researchers analyze interviews, open-ended surveys, and documents, and Evidano automates code frequency tables, thematic consolidation, and exports compatible with audit trails.

Contextual link: See features for thematic coding and visualization on the Evidano features page (Evidano features).

Problem: administrative and policy documents are scattered across regions

Answer: The problem is that policy evidence (for example, visado requirements) is often decentralized and hard to connect to interview data.

Solution: Evidano ingests documents and spreadsheets, enabling cross-reference of interview quotations with regional formularies and prior authorisation rules to surface patterns that match clinician-reported barriers.

Problem: measuring unstructured HRQoL impressions

Answer: The problem is clinicians report quality-of-life impacts informally, creating a gap between impressions and validated PROM scores.

Solution: Evidano supports the integration of open-text PROM responses and interview excerpts, producing thematic and frequency analyses that make sentiment and burden quantifiable for mixed-methods reporting.

FAQ: qualitative analysis hyperkalaemia management

What were the main themes identified by the PLOS ONE study?

Answer: The main themes were structured clinical algorithms to preserve RAASi, the enabling role of newer potassium binders, system-level access barriers, the central role of nursing and patient communication, and the unmeasured burden on daily life, as reported in PLOS ONE on July 30, 2026.

Supporting detail: PLOS ONE summarised 30 final codes into 15 subthemes and five overarching themes derived from interviews with 12 nephrologists conducted in October 2025.

Do newer potassium binders enable continued RAASi according to the study?

Answer: Yes, nephrologists in the PLOS ONE study described newer binders (patiromer and SZC) as enablers of RAASi continuation.

Supporting detail: PLOS ONE participants contrasted these agents with poorly tolerated traditional resins and linked improved tolerability to better adherence and RAASi maintenance; participants said, "The arrival of the new binders has been a revolution" (PLOS ONE, participant ID09).

How strong is the evidence from this PLOS ONE study for changing policy?

Answer: The PLOS ONE study provides clinician perspectives and hypothesis-generating insights, not quantitative causal evidence for policy change.

Supporting detail: PLOS ONE authors explicitly state the study is qualitative, with 12 specialist interviews and no patient-level outcome measurement, so policy recommendations should be tested with real-world observational or economic studies.

How can AI tools improve reproducibility of this kind of thematic work?

Answer: AI tools can standardise code application, create transparent audit trails of codebook evolution, and quantify code frequencies for rapid triangulation.

Supporting detail: The PLOS ONE team used ATLAS.ti and a codebook; AI-enabled platforms reduce manual effort by extracting initial codes, suggesting merges, and producing exportable audit trails for peer review.

Conclusion & Next Steps

Recap: The PLOS ONE qualitative study published July 30, 2026, shows Spanish nephrologists prioritise RAASi preservation, view newer potassium binders as clinically enabling, and report access and coordination barriers that limit consistent implementation.

For qualitative researchers, the study highlights the importance of combining interview data, policy documents, and PROMs to measure both clinical reasoning and lived experience.

If you run applied health qualitative research and want to accelerate codebook development, document linking, and reproducible reporting, consider an AI-first workflow.

Get started: Try Evidano for free.

Topics

qualitative analysis hyperkalaemia management
hyperkalaemia qualitative study
RAASi preservation Spain
potassium binders qualitative

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RAASi Preservation: Qualitative Analysis of Hyperkalaemia

Key Takeaways

What happened in the PLOS ONE study and how it was measured

Findings Snapshot

Implications for clinical researchers and qualitative teams

How Evidano helps translate PLOS ONE-style qualitative studies into reproducible insights

Problem: small-sample interviews produce dispersed codes that are hard to summarise

Problem: administrative and policy documents are scattered across regions

Problem: measuring unstructured HRQoL impressions

FAQ: qualitative analysis hyperkalaemia management

What were the main themes identified by the PLOS ONE study?

Do newer potassium binders enable continued RAASi according to the study?

How strong is the evidence from this PLOS ONE study for changing policy?

How can AI tools improve reproducibility of this kind of thematic work?

Conclusion & Next Steps

Topics

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