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peds.brue.v1

Brief Resolved Unexplained Event (BRUE)

pediatricsacutepediatric
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12/12 authored

Canonical 12-phase frame with authored status for this dossier.

Current phase

Frame

Detailed

Confirm BRUE definition: infant <1 yr + sudden brief (<1 min) resolved episode + ≥1 of cyanosis-pallor / breathing change / tone change / altered responsiveness + no explanation after history-exam (AAP 2016 Tieder PMID 27244835)

Inputs
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Actions
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Advance rule
Set
Advance when

BRUE definition confirmed; episode resolved at presentation; no alternative diagnosis from history-exam

Patient inputs (19)

Family history of sudden unexplained death, parental concern for abuse, prior similar events, social-risk concerns (AAP 2016 Tieder)

Abnormal vital signs, bruising, retinal hemorrhages, abnormal neurologic exam, cardiopulmonary findings (AAP 2016 Tieder)

Persistent hypoxemia after event → higher-risk + admit (AAP 2016 Tieder)

Tachycardia / bradycardia at presentation → higher-risk (AAP 2016 Tieder)

Tachypnea or apnea at presentation → higher-risk (AAP 2016 Tieder)

Age >60 d is a lower-risk gate (AAP 2016 Tieder); <60 d → higher-risk by definition

GA ≥32 wk AND PMA ≥45 wk required for lower-risk classification (AAP 2016 Tieder)

PMA ≥45 wk required for lower-risk classification; <44 wk PMA overlaps with apnea of prematurity (AAP 2016 Tieder)

Duration <60 s required for lower-risk classification; ≥60 s → higher-risk (AAP 2016 Tieder)

Cyanosis or pallor is one of the 4 defining BRUE features (AAP 2016 Tieder)

Absent / decreased / irregular breathing is a defining BRUE feature (AAP 2016 Tieder)

Marked tone change (hyper- or hypotonia) is a defining BRUE feature (AAP 2016 Tieder)

Altered level of responsiveness is a defining BRUE feature (AAP 2016 Tieder)

Fever in infant <60 d routes to peds.febrile-infant.core.v1 sibling pathway (AAP 2016 Tieder; AAP 2021 Pantell)

First event required for lower-risk; recurrent → higher-risk + workup intensification (AAP 2016 Tieder)

CPR by trained provider during event → higher-risk by definition (AAP 2016 Tieder)

Pertussis screen for unexplained BRUE especially <4 mo (AAP 2016 Tieder weak recommendation)

Caregiver perception of color change must be assessed carefully — distinguish true central cyanosis from perioral cyanosis with crying, pallor with fright (AAP 2016 Tieder)

ECG MAY be obtained even in lower-risk BRUE per AAP 2016 (weak recommendation) to screen for long-QT, WPW, hypertrophic cardiomyopathy; required in higher-risk (AAP 2016 Tieder)

* = hard-required. Engine cannot meaningfully run until these are filled.

Severity triggers (10)

10 need judgement
  • informationallife_threateningsuspected_child_abuse_in_brue
    BRUE with concerning features for abuse — bruising in non-mobile infant, retinal hemorrhages, abnormal neuro exam, inconsistent history, prior CPS involvement, social-risk concerns (AAP 2016 Tieder; AAP 2020 Christian abusive head trauma)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalseverehigher_risk_brue_full_workup
    Higher-risk BRUE — any AAP 2016 lower-risk criterion fails: age ≤60 d OR GA <32 wk OR PMA <45 wk OR event duration ≥60 s OR recurrent event OR CPR by trained provider OR any concerning history/exam feature (AAP 2016 Tieder PMID 27244835)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalsevereseizure_in_brue
    BRUE with seizure features — focal motor activity, clonic movements, gaze deviation, postictal state, or recurrent stereotyped events (AAP 2016 Tieder; AES 2016)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalseverecardiac_workup_brue
    BRUE with cardiac concern — abnormal ECG (long-QT, WPW, hypertrophic cardiomyopathy pattern), murmur, family history of sudden cardiac death or channelopathy, syncope with effort, or cyanosis without respiratory cause (AAP 2016 Tieder)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalseveremetabolic_disorder_screen_brue
    BRUE with metabolic concern — recurrent BRUE, family history of inborn error of metabolism or unexplained infant death, hypoglycemia, hyperammonemia, lactic acidosis, abnormal newborn screen, dysmorphic features, hepatomegaly, developmental regression (AAP 2016 Tieder)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalsevererepeat_brue_higher_risk_evaluation
    Recurrent BRUE — second or subsequent event in same infant (AAP 2016 Tieder)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalseverepertussis_test_in_unexplained_brue
    Unexplained BRUE in infant <4 mo or unvaccinated infant (AAP 2016 Tieder; Red Book 2021 CDC)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalmoderategerd_with_brue
    BRUE with GERD concern — recurrent regurgitation, choking with feeds, arched-back posturing, feeding refusal, failure to thrive (AAP 2016 Tieder; NASPGHAN 2018 Rosen)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalmoderateapnea_of_prematurity_overlap
    Infant <44 wk postmenstrual age presenting with BRUE-like episode — apnea of prematurity is a different entity and should not be classified as BRUE (AAP 2016 Tieder)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalmildlower_risk_brue_discharge_with_education
    Lower-risk BRUE — ALL AAP 2016 criteria met: age >60 d AND GA ≥32 wk AND PMA ≥45 wk AND first event AND duration <60 s AND no trained-CPR AND no concerning history/exam (AAP 2016 Tieder)
    Trigger could not be auto-evaluated — needs clinician judgement.

Workflow calculators

This dossier does not reference any calculators.

Recommended regimen

Lower-risk BRUE — supportive care + caregiver education (AAP 2016 Tieder PMID 27244835) — NO routine medications
axis: brue_lower_risk_supportive
Selected axis "Lower-risk BRUE — supportive care + caregiver education (AAP 2016 Tieder PMID 27244835) — NO routine medications" by default fallback (first axis)
  • NO routine pharmacotherapy for lower-risk BRUE
    first line
    observation_education
    Brief monitored observation 1-4 h + caregiver CPR teaching + reassurance + close 24 h PCP follow-up + return precautions
    triggers: lower_risk_brue_classification_met
    AAP 2016 Tieder — lower-risk BRUE does not warrant routine labs, imaging, EEG, CXR, echo, hospitalization, or medications; supportive observation + caregiver education is the standard

outpatient playbook — drug actions (3)

  1. 1. NO routine medications at outpatient follow-up for lower-risk BRUE
    N/A • N/A • N/A
    trigger: Lower-risk BRUE classification at index visit
    AAP 2016 Tieder — no routine pharmacotherapy; outpatient visit is reassurance + monitoring + education
  2. 2. pertussis-targeted antibiotic per Red Book if not started inpatient
    azithromycin 10 mg/kg PO day 1 then 5 mg/kg PO days 2-5 • PO • daily x 5 d
    trigger: Pertussis PCR positive from index visit
    CDC Red Book 2021 — outpatient initiation acceptable if infant well + family reliable
  3. 3. continuation of subspecialist-directed therapy
    per subspecialist • per subspecialist • per subspecialist
    trigger: Cardiac / neurologic / metabolic / GI etiology confirmed on inpatient workup
    AAP 2016 Tieder — etiology-specific outpatient management

Auto-drafted A&P note

outpatient

Subjective

- Possible entry pathways: Brief (<1 min) resolved episode in infant <1 yr with cyanosis/pallor, breathing change, tone change, or altered responsiveness (AAP 2016 Tieder PMID 27244835); Cyanotic or pallid spell in infant <1 yr — caregiver report (AAP 2016 Tieder); Apneic or breathing-irregularity episode in infant <1 yr, now well (AAP 2016 Tieder).

Objective

- No vitals, labs, or imaging entered for this encounter.

Assessment

**Brief Resolved Unexplained Event (BRUE)** (peds.brue.v1).
Phenotype framing: BRUE (idiopathic — most common) vs sepsis vs seizure vs GERD with apnea vs congenital heart disease (long-QT, WPW, hypertrophic cardiomyopathy, anomalous coronary, ductal-dependent lesion) vs metabolic / inborn error vs child abuse (abusive head trauma, suffocation) vs pertussis vs apnea of prematurity (if <44 wk PMA) vs breath-holding spell (typically >6 mo with trigger) vs vasovagal-equivalent vs medication / toxin exposure (AAP 2016 Tieder)
Scope: Confirm BRUE definition: infant <1 yr + sudden brief (<1 min) resolved episode + ≥1 of cyanosis-pallor / breathing change / tone change / altered responsiveness + no explanation after history-exam (AAP 2016 Tieder PMID 27244835)

No severity triggers fired against current inputs.

Plan

Regimen axis: **Lower-risk BRUE — supportive care + caregiver education (AAP 2016 Tieder PMID 27244835) — NO routine medications**.
1. NO routine pharmacotherapy for lower-risk BRUE Brief monitored observation 1-4 h + caregiver CPR teaching + reassurance + close 24 h PCP follow-up + return precautions (observation_education, first line) — AAP 2016 Tieder — lower-risk BRUE does not warrant routine labs, imaging, EEG, CXR, echo, hospitalization, or medications; supportive observation + caregiver education is the standard

Setting playbook (outpatient) — 24-h PCP follow-up after lower-risk BRUE discharge — confirm no recurrence, reinforce CPR teaching + safe sleep + return precautions; longer-term developmental surveillance; subspecialist coordination for higher-risk BRUE (AAP 2016 Tieder)
2. NO routine medications at outpatient follow-up for lower-risk BRUE N/A N/A N/A — Lower-risk BRUE classification at index visit (AAP 2016 Tieder — no routine pharmacotherapy; outpatient visit is reassurance + monitoring + education)
3. pertussis-targeted antibiotic per Red Book if not started inpatient azithromycin 10 mg/kg PO day 1 then 5 mg/kg PO days 2-5 PO daily x 5 d — Pertussis PCR positive from index visit (CDC Red Book 2021 — outpatient initiation acceptable if infant well + family reliable)
4. continuation of subspecialist-directed therapy per subspecialist per subspecialist per subspecialist — Cardiac / neurologic / metabolic / GI etiology confirmed on inpatient workup (AAP 2016 Tieder — etiology-specific outpatient management)

Non-pharmacologic actions:
- Reinforce CPR teaching — review caregiver confidence; provide written + video resources; refer to AHA pediatric BLS course if not yet trained (AAP 2016 Tieder)
- Reinforce safe sleep — back-to-sleep, firm mattress, no soft bedding, room-sharing not bed-sharing, smoke-free home, breastfeeding promotion (AAP 2022 Moon)
- Reinforce return precautions — any new event / color change / breathing concern / feeding difficulty / lethargy / seizure / fever → ED (AAP 2016 Tieder)
- Tobacco-smoke-exposure cessation counseling for household (AAP 2016 Tieder; AAP 2022 Moon)
- Vaccination catch-up — pertussis (DTaP/Tdap), Tdap for caregivers (cocooning), routine peds schedule (ACIP 2024)
- Developmental surveillance + early intervention referral if higher-risk BRUE history with confirmed neurologic etiology (AAP 2016 Tieder)
- Family support resources — parental anxiety after BRUE is common; provide resources and emotional support (AAP 2016 Tieder)
- Subspecialist appointment coordination + tracking (AAP 2016 Tieder)

AVOID / contraindication checks:
- Do_not_routinely_admit_lower_risk_brue (AAP 2016 Tieder — shared decision making about brief observation vs admission)
- Do_not_obtain_routine_labs_imaging_EEG_in_lower_risk_brue (AAP 2016 Tieder — strong recommendations against)
- Do_not_initiate_home_apnea_monitoring_for_lower_risk_brue (AAP 2016 Tieder — strong recommendation against; does not prevent SIDS)
- Do_not_prescribe_anti_GERD_medications_routinely_for_brue (AAP 2016 Tieder; PPI/H2RA not indicated without confirmed pathologic GERD)
- Do_not_initiate_antiepileptic_therapy_in_brue_without_confirmed_seizure (AAP 2016 Tieder)

Monitoring

Regimen monitoring:
- continuous pulse ox during brief observation 1 to 4 hours (AAP 2016 Tieder)
- vitals q1h during observation (AAP 2016 Tieder)
- reassess before discharge well appearing tolerating PO (AAP 2016 Tieder)
- 24 h PCP telephone or in person follow up (AAP 2016 Tieder)

Setting (outpatient) monitoring:
- 24 h telephone check-in (AAP 2016 Tieder)
- 24-72 h in-person clinic visit if any concern (AAP 2016 Tieder)
- Routine well-child visits at 2 / 4 / 6 / 9 / 12 mo (AAP Bright Futures)
- Subspecialist appointments per workup findings (AAP 2016 Tieder)

Follow-up plan: Lower-risk: PCP follow-up within 24 h (telephone + in-person at 24-72 h); reinforce CPR teaching; review return precautions (any new event, color change, breathing concern, feeding difficulty, lethargy → ED); discuss safe sleep (back-to-sleep, room-sharing not bed-sharing, smoke-free home) and breastfeeding promotion (AAP 2016 Tieder; AAP 2022 Moon safe sleep). Higher-risk: outpatient pediatric subspecialist follow-up based on workup findings (cardiology, neurology, GI, metabolism, child abuse / CPS); developmental surveillance (AAP 2016 Tieder)
- Close-out criterion: Follow-up plan + return precautions + safe sleep + CPR teaching documented

Monitoring phase: Lower-risk: continuous pulse-ox during brief observation; vitals q1h; recheck before discharge. Higher-risk: continuous cardiorespiratory monitoring + apnea alarm; vitals q4h; serial neuro exam if seizure suspected; EEG monitoring if epileptiform activity captured (AAP 2016 Tieder)

Disposition

Current setting: outpatient — 24-h PCP follow-up after lower-risk BRUE discharge — confirm no recurrence, reinforce CPR teaching + safe sleep + return precautions; longer-term developmental surveillance; subspecialist coordination for higher-risk BRUE (AAP 2016 Tieder)

Disposition criteria:
- Continue routine well-child follow-up if lower-risk BRUE + no recurrence + caregiver confidence restored (AAP 2016 Tieder)
- Continue subspecialist follow-up per workup findings for higher-risk BRUE (AAP 2016 Tieder)
- Document RSV-prevention plan + vaccination plan + safe sleep plan (AAP 2022 Moon; ACIP 2024)

Escalation triggers (move to higher acuity):
- New BRUE event reported by caregiver → return to ED + admit + intensify workup (AAP 2016 Tieder)
- New focal neurologic finding → return to ED + neuro consult + EEG (AES 2016)
- New cardiac symptom (cyanosis at rest, exercise intolerance) → cardiology referral + ECG / echo (AAP 2016 Tieder)
- New abuse concern → CPS notification + child abuse pediatrics referral (AAP 2020 Christian)
- Failure to thrive or developmental regression → return to ED OR urgent peds visit (AAP 2016 Tieder)

Earlier-Return Triggers

Return-precaution thresholds (watch for):
- [LIFE_THREATENING] BRUE with concerning features for abuse — bruising in non-mobile infant, retinal hemorrhages, abnormal neuro exam, inconsistent history, prior CPS involvement, social-risk concerns (AAP 2016 Tieder; AAP 2020 Christian abusive head trauma)
- [SEVERE] Higher-risk BRUE — any AAP 2016 lower-risk criterion fails: age ≤60 d OR GA <32 wk OR PMA <45 wk OR event duration ≥60 s OR recurrent event OR CPR by trained provider OR any concerning history/exam feature (AAP 2016 Tieder PMID 27244835)
- [SEVERE] BRUE with seizure features — focal motor activity, clonic movements, gaze deviation, postictal state, or recurrent stereotyped events (AAP 2016 Tieder; AES 2016)

Citations

- AAP 2016 Clinical Practice Guideline — Brief Resolved Unexplained Events (BRUE) in lower-risk infants (Tieder et al, Pediatrics 2016) + AAP 2020 Christian abusive head trauma technical report + AAP 2021 Pantell febrile infant CPG (for febrile BRUE overlap) + AAP 2022 Moon safe sleep + Red Book 2021 (pertussis) + NASPGHAN 2018 Rosen (GERD) + AES 2016 (seizure) [PMID:27244835](https://pubmed.ncbi.nlm.nih.gov/27244835/)
- Cited evidence (PMID 34281996) [PMID:34281996](https://pubmed.ncbi.nlm.nih.gov/34281996/)
- Cited evidence (PMID 25349312) [PMID:25349312](https://pubmed.ncbi.nlm.nih.gov/25349312/)
- Cited evidence (PMID 23359576) [PMID:23359576](https://pubmed.ncbi.nlm.nih.gov/23359576/)
- Cited evidence (PMID 34168059) [PMID:34168059](https://pubmed.ncbi.nlm.nih.gov/34168059/)

Last reconciled with current guidelines: 2026-05-15.
References
  • AAP 2016 Clinical Practice Guideline — Brief Resolved Unexplained Events (BRUE) in lower-risk infants (Tieder et al, Pediatrics 2016) + AAP 2020 Christian abusive head trauma technical report + AAP 2021 Pantell febrile infant CPG (for febrile BRUE overlap) + AAP 2022 Moon safe sleep + Red Book 2021 (pertussis) + NASPGHAN 2018 Rosen (GERD) + AES 2016 (seizure) — PMID:27244835
  • Cited evidence (PMID 34281996) — PMID:34281996
  • Cited evidence (PMID 25349312) — PMID:25349312
  • Cited evidence (PMID 23359576) — PMID:23359576
  • Cited evidence (PMID 34168059) — PMID:34168059