ICU and You · Podcast Sessions · Number 56
Three age bands, three algorithms, and one phrase doing all the work
Free, no subscription, and the show notes carry the guideline algorithms in full — worth opening alongside the audio.
Listen first. It is not a test. Do not take notes, do not try to hold the numbers, and do not stop to look anything up. Let it wash over you on a drive or a walk and accept that most of it will not stick. That is not a failure of attention; it is how listening works.
What a podcast does that no paper can is let you hear somebody think. The hesitations, the qualifications, the places where an expert says plainly that we do not know — none of that survives into print, and it is most of what you are actually there for. You are picking up how somebody holds a problem, not a set of facts.
Then talk about it. Bring one thing to a ward round, argue with somebody about it over coffee, disagree with the guest out loud. An episode discussed once is worth three listened to alone.
And if something matters enough to act on, look it up properly afterwards. A podcast is a way in, not a source.
Tim Horeczko is a paediatric emergency physician who has been making this podcast since 2015, giving it away for nothing, and offering continuing education credit with it. He is a genuinely fine teacher — unhurried, warm, and constitutionally incapable of reciting a guideline without asking what it is for. The Playbook signs off every episode with the same line, and it tells you everything about why the show is worth your time: you are the Champion for the child in front of you.
This episode works through the American Academy of Pediatrics clinical practice guideline published in 2021 — the one that finally replaced three decades of competing local rules for the febrile infant.
Its whole architecture is three age bands, and the management differs sharply between them. Note the boundaries: this covers 8 to 60 days, and only infants who look well.
8–21 days
Everyone gets the full workup — blood, urine and cerebrospinal fluid — parenteral antibiotics, and admission. No exceptions, no biomarker gets you out of it.
22–28 days
Inflammatory markers begin to guide decisions. Lumbar puncture is recommended, but the guideline allows some discretion. Admission is still the expectation.
29–60 days
With normal markers and a normal urine, most may be observed at home. This is the band where the guideline genuinely changed practice — and it is the age group in question.
The markers doing that work are procalcitonin above 0.5 ng/mL, CRP above 20 mg/L, and an absolute neutrophil count above 4,000 — or above 5,200 where procalcitonin is unavailable, in which case a temperature above 38.5 °C is also treated as abnormal.
The age bands are the guideline. Not a detail of it — the whole of it. A twenty-day-old and a thirty-day-old with identical fevers and identical bloods are managed completely differently, and knowing which side of the line a baby falls on is the first thing to establish.
“Well-appearing” is load-bearing, and it is the trap. Every algorithm in the paper assumes it. An ill-appearing infant of any age in this range gets everything, immediately — and the assessment of well versus ill is a clinical judgement made by a human being, not a number. This is the same argument as the aphorism for this topic: the parent noticed something before the chart did.
Know what it excludes. Under 8 days old, preterm, unwell-looking, focal infection, indwelling device, comorbidity — none of these are covered. The guideline is a permission to do less in a narrowly defined group, and it is at its most dangerous when applied outside that group.
It is a 2022 episode about a 2021 guideline, and specifics may have moved. Check the current version before you change what you do.
And it is American. Procalcitonin is not universally available in Australian practice, and local and state guidance is in several respects more conservative than the AAP. Take the reasoning, which is excellent, and check the thresholds against your own protocol rather than adopting them from a podcast.
A thirty-four-day-old with a fever of 38.4 °C, feeding normally, and looking entirely well. What do you actually do — and does your unit have a written rule for it?
I am interested less in the algorithm than in what happens in practice at two in the morning, and whether the person on the floor knows where to find the rule. Send me a sentence.
The button opens a reply straight to me. If your device blocks it, write to icuandyou@icloud.com instead.