2 PAEDS IN A POD Episode 85 | The Trouble With Boluses

Released: 07/06/2026 | Runtime: ~20 minutes

EPISODE SUMMARY

This episode leads on fluid in childhood sepsis. A new multicentre cohort from Australia and New Zealand found that mortality rose with the volume of bolus fluid given in the first day, but not with the total volume of fluid — a finding set alongside the recently published PRoMPT BOLUS trial, which showed that balanced fluid and saline produce the same kidney outcomes. The second story returns to the febrile infant for a third time, with a meta-analysis quantifying the risk of serious bacterial infection in the well sixty-to-ninety-day-old. What's Caught My Eye covers the TWIST score and ultrasound for the acute scrotum, nirsevimab versus the maternal RSV vaccine head to head, and language barriers and safety in the paediatric emergency department.

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MAIN STORY 1: How much fluid is too much in childhood sepsis? ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Fluid is the first thing we reach for in the septic child, and the volume question has never been fully settled. This cohort measured the fluid children actually received in the first twenty-four hours and asked how it related to outcome, arriving just as PRoMPT BOLUS reported on the separate question of which fluid to use.

Key findings:

• 5,352 children with suspected community-acquired sepsis across 11 emergency departments in Australia and New Zealand (2021–2023); median age 2.6 years.
• In-hospital mortality was low at 1.1%; around 5.5% met Phoenix sepsis criteria.
• Median total fluid in the first 24 hours was 40 mL/kg, of which the bolus component was 10 mL/kg.
• Mortality rose with increasing bolus volume but not with increasing total fluid; the unadjusted odds ratio for death with more than 55 mL/kg versus less than 15 mL/kg of bolus fluid was 20.5 (95% CI 8.0–52.5).
• For context, PRoMPT BOLUS (9,041 children, 47 departments, five countries) found no difference in major adverse kidney events between balanced fluid and 0.9% saline (3.4% vs 3.0%), with less hyperchloraemia in the balanced-fluid group.

For practice, the converging message is that the fluid you choose matters less than hoped, while the volume you give may matter more than thought. This supports the titrated, reassess-after-each-bolus approach that NICE and APLS already ask for, rather than a fixed escalator.

Important caveat: the bolus–mortality association is unadjusted and observational, and the sickest children in refractory shock receive the most bolus fluid, so this does not show that boluses cause harm and is not a reason to withhold fluid from a shocked child.

Reference: Long E, Selman C, Borland ML, et al. Archives of Disease in Childhood. Published May 2026. DOI: https://doi.org/10.1136/archdischild-2025-330189

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MAIN STORY 2: How risky is the febrile two-month-old? ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

The sixty-to-ninety-day-old is the febrile infant our guidelines treat least consistently — some pathways stop at sixty days, others lump the whole under-ninety group together. This meta-analysis supplies the missing denominator for that group, completing a run that has moved from risk stratification, through practice variation, to underlying prevalence.

Key findings:

• 59 studies, 20 distinct datasets, just under 34,835 well-appearing, previously healthy febrile infants aged 60–90 days.
• Pooled prevalence of invasive bacterial infection was 1.11% (95% CI 0.84–1.47), roughly 1 in 90.
• Almost all of that was bacteraemia at 1.01%; bacterial meningitis was rare at 0.11%, roughly 1 in 900.
• Estimates held across every sensitivity analysis, including removal of the single largest study.

The clinical bottom line is a number to carry into both your own reasoning and the conversation with parents: in the well infant in this band, meningitis risk of around one in nine hundred is a reasonable thing to weigh when deciding whether this particular baby needs a lumbar puncture or a more measured pathway with good safety-netting.

These are international data, so map the figures onto your local febrile infant pathway and the NICE traffic-light thresholds rather than applying them in isolation.

Reference: Dionisopoulos Z, Sabhaney V, D'Arienzo D, et al. JAMA Pediatrics. Published May 2026. DOI: https://doi.org/10.1001/jamapediatrics.2026.1815

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WHAT'S CAUGHT MY EYE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

1. TWIST and ultrasound for the acute scrotum

A retrospective study of just over 500 boys aged fifteen and under with an acute scrotum tested how the TWIST score and point-of-care ultrasound perform in the hands of emergency physicians and paediatricians. The TWIST score had a sensitivity of around 91% and a negative predictive value of 99%, and adding ultrasound pushed sensitivity to 96% and negative predictive value to 100%. Worth your time because it supports front-door risk stratification of the acute scrotum, though the residual false negatives mean it cannot be used to rule torsion out.

Reference: Nakamura T, Kinoshita M, Ihara T, et al. Emergency Medicine Journal. Published May 2026. DOI: https://doi.org/10.1136/emermed-2025-215067

2. Nirsevimab versus the maternal RSV vaccine, head to head

A French national cohort of more than 164,000 infants across the 2024–25 season compared nirsevimab given at birth against maternal RSVpreF vaccination. Nirsevimab was associated with about a 22% lower chance of RSV-related hospitalisation (OR 0.78, 95% CI 0.70–0.86), but that advantage disappeared when the maternal vaccine had been given at least eight weeks before delivery. Worth your time because both products are now live in the UK, so this speaks directly to counselling families and to the timing of maternal vaccination.

Reference: Valtuille Z, Fafi I, Kaguelidou F, et al. The Lancet Child & Adolescent Health. Published May 2026. DOI: https://doi.org/10.1016/S2352-4642(26)00075-1

3. Language barriers and safety in the paediatric emergency department

A scoping review of 33 studies mapped where, along the emergency care journey, language barriers threaten the safety of children's care. Risk appeared at every stage, but discharge — the moment we hand over safety-netting and home-care advice — was flagged most often. Worth your time as a pointed reminder that, in a multilingual NHS population, the discharge conversation is a safety-critical step rather than an afterthought.

Reference: Odedra R, Averill P, Nijman RG, et al. Emergency Medicine Journal. Published May 2026. DOI: https://doi.org/10.1136/emermed-2025-215617

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KEY TAKEAWAYS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

• PRoMPT BOLUS shows balanced fluid and saline produce the same kidney outcomes in paediatric septic shock; the choice of fluid matters less than once hoped.
• New observational data suggest it is bolus volume, not total fluid, that tracks with mortality — a reason to give a measured bolus, reassess, and only repeat if the child still needs it, not a reason to withhold fluid.
• In the well sixty-to-ninety-day-old, invasive bacterial infection runs at about 1 in 90 and meningitis at about 1 in 900 — a denominator for proportionate investigation and honest parent conversations.
• The TWIST score and ultrasound can risk-stratify the acute scrotum at the front door but cannot rule torsion out.
• In a multilingual population, discharge and safety-netting are the highest-risk points for language-related harm.

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FULL REFERENCE LIST ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

All articles retrieved from PubMed.

1. Long E, Selman C, Borland ML, et al. IV bolus, maintenance and medication carrier fluid in children with community-acquired sepsis: a multicentre cohort study. Archives of Disease in Childhood. 2026. Advance online publication. https://doi.org/10.1136/archdischild-2025-330189
2. Dionisopoulos Z, Sabhaney V, D'Arienzo D, et al. Prevalence of Invasive Bacterial Infections Among Febrile Infants Aged 60 to 90 Days: A Systematic Review and Meta-Analysis. JAMA Pediatrics. 2026. Advance online publication. https://doi.org/10.1001/jamapediatrics.2026.1815
3. Nakamura T, Kinoshita M, Ihara T, et al. Evaluating the TWIST score and point-of-care ultrasound for paediatric testicular torsion. Emergency Medicine Journal. 2026;43(6):334–340. https://doi.org/10.1136/emermed-2025-215067
4. Valtuille Z, Fafi I, Kaguelidou F, et al. Effectiveness of nirsevimab immunisation after birth versus RSVpreF maternal vaccination in preventing RSV-related hospitalisations in infants: a population-based retrospective cohort study. The Lancet Child & Adolescent Health. 2026. Advance online publication. https://doi.org/10.1016/S2352-4642(26)00075-1
5. Odedra R, Averill P, Nijman RG, et al. Understanding how language barriers in the paediatric emergency care setting influences safety of care delivery: a scoping review. Emergency Medicine Journal. 2026. Advance online publication. https://doi.org/10.1136/emermed-2025-215617

Supporting references (main story 1 context):

1. Balamuth F, Weiss SL, Long E, et al. Balanced Fluid or 0.9% Saline in Children Treated for Septic Shock. The New England Journal of Medicine. 2026. https://doi.org/10.1056/NEJMoa2601969
2. PRoMPT BOLUS; fluids for treating shock, the evidence builds [editorial]. Archives of Disease in Childhood. 2026;111(6):485. https://doi.org/10.1136/archdischild-2026-330872

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2 Paeds in a Pod is a paediatric medical education podcast hosted by Dr Ian Lewins, Clinical Lead for Paediatric Urgent and Emergency Care at University Hospitals of Derby and Burton NHS Foundation Trust. New episodes fortnightly.

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The content of this podcast is intended for educational purposes only. It does not constitute clinical advice. Always refer to current national guidelines and local protocols when making clinical decisions.