Daily Clinical Briefing · Educational reading for healthcare professionals
AEIOU separates a missed dialysis session from physiological problems that need emergency dialysis.
Creatinine alone is not an indication for emergency dialysis.
Missing dialysis does not automatically mean a patient needs emergency dialysis. Equally, a frightening creatinine result is not enough to make that decision.
A more useful structure is AEIOU: acidosis, electrolytes, ingestion, overload and uraemia. The point is to identify a physiological problem that cannot safely wait rather than treating the dialysis schedule or creatinine as the indication.
Acidosis becomes an emergency dialysis problem when it remains uncorrected despite treatment and continues to cause altered mental state or haemodynamic instability. The cause still needs treating. Dialysis becomes relevant when that treatment has not resolved the dangerous physiological consequence.
Hyperkalaemia needs the same clinical interpretation. Patients receiving regular dialysis may tolerate higher potassium concentrations than expected, so the number alone is not enough. Persistent hyperkalaemia with ECG changes despite potassium-lowering treatment provides a much stronger reason to dialyse.
The “I” is easy to overlook because it also applies to people who do not usually receive dialysis. Large ingestions of lithium, ethylene glycol, methanol and salicylates are examples where dialysis may become part of emergency treatment.
Fluid overload is another situation where the details matter. Pulmonary fluid overload with a new oxygen requirement needs fluid removal, but diuresis has obvious limitations when the patient produces no urine. Knowing whether the kidneys can actually respond changes the usefulness of another dose of diuretic.
Then there is uraemia. Accumulating nitrogenous waste can produce altered mental state or a pericardial effusion that may progress to tamponade. Blood urea nitrogen can support the assessment, but the clinical complication is what makes the result important.
The practical value of AEIOU is that it shifts attention away from a single laboratory result. For someone who has missed dialysis, work through acidosis, potassium and ECG findings, possible dialysable toxins, pulmonary fluid overload and clinical uraemia. If none is present, a missed session alone does not establish the need for emergency dialysis. If one of these problems is present and not responding to treatment, the situation has changed.
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When a patient has missed dialysis, work systematically through acidosis, electrolytes, ingestions, overload and uraemia rather than using creatinine alone. In hyperkalaemia, review the ECG and response to treatment. With pulmonary fluid overload, check urine production before relying on diuresis.
A patient receiving regular dialysis misses a session and presents with sepsis-related metabolic acidosis. Treatment of the sepsis does not correct the acidosis, and haemodynamic instability persists. Which feature provides the strongest indication for emergency dialysis?
Persistent metabolic acidosis causing haemodynamic instability despite treatment. A missed dialysis session or elevated creatinine alone does not establish the need for emergency dialysis.
An older adult receiving anti-amyloid treatment develops a new headache, dizziness and increased cognitive difficulty despite a reassuring surveillance MRI several weeks earlier. Which investigation should be prioritised?
Brain MRI should be prioritised to assess for amyloid-related imaging abnormalities. A previous reassuring MRI does not exclude later ARIA, and CT may not demonstrate it reliably.
A guideline is based on high-certainty evidence, but patient preferences, resources and feasibility vary substantially between settings. Can the recommendation still reasonably be conditional?
Yes. Evidence certainty and recommendation strength are different judgements. Recommendation strength also considers benefits and harms, patient values, feasibility, resources and equity.
Daily Clinical Briefings are prepared using ChatGPT Pro from the show notes and educational output for that day’s episodes. Iain Beardsell then checks the briefing for accuracy.
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