Paeds · clinical-assessment-and-reasoning
Illness severity, deterioration and track-and-trigger systems
Also known as PEWS · Paediatric early warning system · Track and trigger · Paediatric MET · Rapid response system · Failure to rescue · BedsidePEWS · Clinical deterioration
Fellowship approach to illness severity versus risk of deterioration, paediatric track-and-trigger tools and PEWS architecture, rapid-response systems, EPOCH and systematic-review evidence, caregiver concern, incomplete charts, escalation culture and safe disposition across age bands.
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Target exams
Red flags
- Rising multi-parameter score or single critical parameter with incomplete observations
- Caregiver or nurse concern that the child is getting worse despite a low score
- Falling respiratory rate or quieter child after high work of breathing (exhaustion, not recovery)
- Compensated shock with maintained blood pressure but rising heart rate and poor perfusion
- Technology-dependent child with device failure or change from personal baseline
- Hesitancy to call MET/RRT because of hierarchy, night-time staffing or fear of 'false alarm'
- Recurrent triggers without diagnosis, unexplained injury pattern or safeguarding concern
Life stages
Care settings
Clinical exam formats
Board mappings
- General and Community Paediatrics
- Current 2026 PREP curriculum — Learning Objective 2.2.1: Recognise, prioritise and manage an acutely ill infant, child or young person
- Current 2026 PREP curriculum — Learning Objective 2.2.3: Perform acute resuscitation and advanced life support
- Current 2026 PREP curriculum — Learning Objective 2.4.5: Manage transfer of an unwell newborn, infant, child or young person
- Renewed curriculum for first-year trainees from 2027 — Learning goal 7: Patient safety / systems
- Renewed curriculum for first-year trainees from 2027 — Learning goal 11: Acute care and procedures
- Renewed curriculum for first-year trainees from 2027 — Learning goal 12: Communication with patients, families, and health professionals
- Renewed curriculum for first-year trainees from 2027 — Learning goal 14: Regional, rural, and remote paediatric care
- Renewed curriculum for first-year trainees from 2027 — Learning goal 17: Acute care
- Clinical Applications
- Medical Sciences
- Long Cases
- Short Cases
- Patient safety, including safe prescribing
- Patient management
- Leadership and team working
- General Paediatrics: Resuscitates, stabilises and treats extremely unwell babies, children and young people
- Foundation of Practice (FOP)
- Theory and Science (TAS)
- Applied Knowledge in Practice (AKP)
- Clinical
- History
- Communication
- Video
- General Pediatrics Content Outline — Domain 7: Emergency and Critical Care
- General Pediatrics Content Outline — Domain 24: Patient Safety, Quality Improvement, and Research Methods
- General Pediatrics EPA 7: Recognizing a Severely Ill Patient, Providing Initial Management, and Mobilizing Resources Needed for Continued Care
- General Pediatrics EPA 8: Executing Clinical Handovers Within or Across Settings
- Patient Care 3: Organize and Prioritize Patient Care
- Patient Care 4: Clinical Reasoning
- Patient Care 5: Patient Management
- Systems-Based Practice 1: Patient Safety
- Interpersonal and Communication Skills 1: Patient- and Family-Centered Communication
- Interpersonal and Communication Skills 2: Interprofessional and Team Communication
- Pediatrics: Foundations EPA #1 — Recognizing deteriorating and/or critically ill patients and initiating stabilization and management
- Pediatrics: Foundations EPA #10 — Transferring clinical information between health care providers during handover
- Pediatrics: Core EPA #2 — Resuscitating and stabilizing critically ill patients
- Pediatrics: Core EPA #11 — Coordinating transitions of care for patients with medical or psychosocial complexity
Overview & Definition
A child on the ward can look “a bit off” long before cardiac arrest. Illness severity is how heavy the disease burden feels now. Physiological instability is whether breathing, circulation or consciousness is failing this minute. Risk of deterioration is what may happen in the next hour if nothing changes. Diagnostic seriousness is the harm of a possible diagnosis even when physiology still looks preserved. Failure-to-rescue is the system failure when that trajectory was visible and the team did not act in time. [4] [12]
The doorway first impression — Appearance, Work of Breathing and Circulation to Skin — belongs primarily to the linked Paediatric Assessment Triangle topic. This page owns what happens next on the chart: track-and-trigger design, PEWS performance, MET/RRT response, incomplete documentation, escalation culture and disposition. [1] [2]
A track-and-trigger tool records observations over time (“track”) and defines when a response must start (“trigger”). A paediatric early warning score is one kind of multi-parameter tool. A paediatric early warning system is larger than the score: documentation design, escalation recommendations, education, family activation and governance all sit around the number. [4] [6] [15]
State a problem representation the way you would on the phone to the MET: age and baseline, current score and trajectory, which observations are missing, what the caregiver is worried about, what you have already done, and what response you need now. [1] [2]
References25ShowHide
- [1]Parshuram CS, Hutchison J, Middaugh K Development and initial validation of the Bedside Paediatric Early Warning System score. Critical care (London, England), 2009.PMID 19678924
- [2]Parshuram CS, Duncan HP, Joffe AR, et al. Multicentre validation of the bedside paediatric early warning system score: a severity of illness score to detect evolving critical illness in hospitalised children. Critical care (London, England), 2011.PMID 21812993
- [3]Parshuram CS, Dryden-Palmer K, Farrell C, et al. Effect of a Pediatric Early Warning System on All-Cause Mortality in Hospitalized Pediatric Patients: The EPOCH Randomized Clinical Trial. JAMA, 2018.PMID 29486493
- [4]Trubey R, Huang C, Lugg-Widger FV, et al. Validity and effectiveness of paediatric early warning systems and track and trigger tools for identifying and reducing clinical deterioration in hospitalised children: a systematic review. BMJ open, 2019.PMID 31061010
- [5]Chapman SM, Wray J, Oulton K, et al. 'The Score Matters': wide variations in predictive performance of 18 paediatric track and trigger systems. Archives of disease in childhood, 2017.PMID 28292743
- [6]Lambert V, Matthews A, MacDonell R, et al. Paediatric early warning systems for detecting and responding to clinical deterioration in children: a systematic review. BMJ open, 2017.PMID 28289051
- [7]Fleming S, Thompson M, Stevens R, et al. Normal ranges of heart rate and respiratory rate in children from birth to 18 years of age: a systematic review of observational studies. Lancet (London, England), 2011.PMID 21411136
- [8]Daymont C, Bonafide CP, Brady PW Heart rates in hospitalized children by age and body temperature. Pediatrics, 2015.PMID 25917984
- [9]Mills E, Lin P, Asghari-Jafarabadi M, et al. Association between caregiver concern for clinical deterioration and critical illness in children presenting to hospital: a prospective cohort study. The Lancet. Child & adolescent health, 2025.PMID 40451224
- [10]Tibballs J, Kinney S, Duke T, et al. Reduction of paediatric in-patient cardiac arrest and death with a medical emergency team: preliminary results. Archives of disease in childhood, 2005.PMID 16243869
- [11]Tibballs J, Kinney S Reduction of hospital mortality and of preventable cardiac arrest and death on introduction of a pediatric medical emergency team. Pediatric critical care medicine : a journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies, 2009.PMID 19307806
- [12]Bonafide CP, Localio AR, Roberts KE, et al. Impact of rapid response system implementation on critical deterioration events in children. JAMA pediatrics, 2014.PMID 24217295
- [13]Devita MA, Bellomo R, Hillman K, et al. Findings of the first consensus conference on medical emergency teams. Critical care medicine, 2006.PMID 16878033
- [14]Allen D, Lloyd A, Edwards D, et al. Development, implementation and evaluation of an evidence-based paediatric early warning system improvement programme: the PUMA mixed methods study. BMC health services research, 2022.PMID 34974841
- [15]Thomas-Jones E, Lloyd A, Roland D, et al. A prospective, mixed-methods, before and after study to identify the evidence base for the core components of an effective Paediatric Early Warning System and the development of an implementation package containing those core recommendations for use in the UK: Paediatric early warning system - utilisation and mortality avoidance- the PUMA study protocol. BMC pediatrics, 2018.PMID 30045717
- [16]Kuo DZ, Houtrow AJ Recognition and Management of Medical Complexity. Pediatrics, 2016.PMID 27940731
- [17]Starmer AJ, Spector ND, Srivastava R, et al. Changes in medical errors after implementation of a handoff program. The New England journal of medicine, 2014.PMID 25372088
- [18]Boylen S, Cherian S, Gill FJ, et al. Impact of professional interpreters on outcomes for hospitalized children from migrant and refugee families with limited English proficiency: a systematic review. JBI evidence synthesis, 2020.PMID 32813387
- [19]Chaichotjinda K, Chantra M, Pandee U Assessment of interhospital transport care for pediatric patients. Clinical and experimental pediatrics, 2020.PMID 31477679
- [20]Fleming S, Gill P, Jones C, et al. Validity and reliability of measurement of capillary refill time in children: a systematic review. Archives of disease in childhood, 2015.PMID 25260515
- [21]Fleming S, Gill P, Jones C, et al. The Diagnostic Value of Capillary Refill Time for Detecting Serious Illness in Children: A Systematic Review and Meta-Analysis. PloS one, 2015.PMID 26375953
- [22]Sharma M, Brown AW, Powell NM, et al. Racial and skin color mediated disparities in pulse oximetry in infants and young children. Paediatric respiratory reviews, 2024.PMID 38233229
- [23]Ramgopal S, Horvat CM, Cash RE, et al. Comparing AVPU and Glasgow Coma Scales Among Children Seen by Emergency Medical Services. Pediatrics, 2024.PMID 38993159
- [24]Burvenich R, Bos DA, Lowie L, et al. Effectiveness of safety-netting approaches for acutely ill children: a network meta-analysis. The British journal of general practice : the journal of the Royal College of General Practitioners, 2025.PMID 39117428
- [25]Bragança-Souza KK, Lopes de Lisboa J, Silva-Oliveira F, et al. Health Professionals: Identifying and Reporting Child Physical Abuse-a Scoping Review. Trauma, violence & abuse, 2024.PMID 36747372