Page 15 of 31

PE24.{5,15} | Unconscious Child — SDL Guide

Learning Objectives

• Describe the aetio-pathogenesis, clinical approach, and management of an unconscious child using AEIOU-TIPS mnemonic
• Assess the level of consciousness using AVPU scale and paediatric GCS
• Demonstrate emergency treatment of a child with convulsions or coma: airway positioning, IV/PR diazepam administration, and 10% dextrose for hypoglycaemia
• Position an unconscious child safely, with and without suspected spinal trauma, in a simulated environment

INSTRUCTIONS

An unconscious child is one of the most time-critical presentations in paediatric emergency medicine. Every minute of delay in identifying and treating a reversible cause — hypoglycaemia, seizure, meningitis, or airway obstruction — worsens neurological outcome. This module equips you to rapidly assess the level of consciousness using validated tools, systematically work through differential diagnoses, and execute the first 60 seconds of emergency management correctly. These skills are tested both in IMNCI danger-sign recognition and in supervised clinical practice.

References

• Ghai Essential Pediatrics, 9th edition, Ch 18 (Paediatric Emergencies) (textbook)
• Nelson Textbook of Pediatrics, 21st edition, Ch 71 (Neurological Emergencies) (textbook)
• IAP Guidelines on Paediatric Emergency Management, 2022 (guideline)
• WHO IMNCI Chart Booklet — Danger Signs and Referral Criteria (guideline)

---

Version 2.0 | NMC CBUC 2024

Why Consciousness Matters: Indication and Clinical Relevance

Consciousness is the brain's most integrative function — requiring an intact arousal system (reticular activating system, RAS) and intact cortical processing. When a child presents with altered or absent consciousness, the clinician is facing a convergence of potentially lethal pathologies, each of which demands a specific intervention. The urgency is categorical: unlike an adult with diabetes who can signal distress, a young child cannot communicate a worsening state, making external rapid assessment the only reliable guide.

The IMNCI danger signs — unable to drink or breastfeed, vomiting everything, convulsions, lethargic or unconscious — were designed for community-level health workers to triage children under 5 who need immediate referral. 'Lethargic or unconscious' is the neurological danger sign, and any child meeting it bypasses general assessment and proceeds directly to emergency stabilisation. In a hospital setting, the same priority applies: the child who arrives obtunded or comatose is assessed and treated simultaneously, not sequentially.

Epidemiology of paediatric coma in India (referencing IAP data) shows hypoglycaemia, CNS infections (bacterial meningitis, cerebral malaria, viral encephalitis), and status epilepticus as the three most common reversible causes. Each requires a different first-line intervention: dextrose for the first, antibiotics and antivirals for the second, and benzodiazepines for the third. Identifying the primary cause — or covering all three simultaneously when the cause is unclear — is the core skill this module builds.

Common Causes of Paediatric Coma in India

Physiological Basis of Consciousness and AVPU/GCS

Consciousness depends on the integrity of two anatomical components: the ascending reticular activating system (RAS) in the brainstem and diencephalon (arousal) and the cerebral cortex (awareness). Both must be intact for normal consciousness. Coma can result from: (a) bilateral cortical injury or suppression (metabolic, toxic, hypoxic); (b) focal or diffuse brainstem pathology disrupting the RAS; or (c) raised intracranial pressure sufficient to produce transtentorial herniation compressing both. Understanding this anatomy explains why a child with meningococcal meningitis becomes comatose through cerebral oedema and raised ICP, while a child with a small subdural haematoma may remain alert because neither the RAS nor the whole cortex is yet compromised. This anatomical framework also clarifies why metabolic coma (hypoglycaemia, hyponatraemia, hepatic failure) is typically reversible — the structure is intact but transiently non-functional — whereas structural coma from compression or infarction carries a higher risk of permanent deficit even with rapid treatment.

Provided image

Two validated scales assess the level of consciousness at the bedside:

The AVPU scale is a rapid 4-point qualitative screen:
• A — Alert: child is awake and age-appropriately responsive
• V — Voice: responds to verbal stimuli (eye opening, sound, movement) but not spontaneously alert
• P — Pain: responds only to painful stimuli (sternal rub or nail-bed pressure)
• U — Unresponsive: no response to any stimulus

AVPU P/U approximately corresponds to GCS ≤8 (coma threshold). It is the IMNCI/community-level tool for rapid field triage.

The paediatric GCS (scale 3–15) quantifies the level more precisely across three domains. Critically, the verbal component is modified for pre-verbal children to assess developmentally appropriate responses rather than adult speech:
• Eye opening: 4 (spontaneous) → 3 (to voice) → 2 (to pain) → 1 (none)
• Motor: 6 (obeys commands) → 5 (localises pain) → 4 (withdraws) → 3 (abnormal flexion) → 2 (extension) → 1 (none)
• Verbal (pre-verbal modification): 5 (age-appropriate vocalisation/smile/tracking) → 4 (less than usual/irritable cry) → 3 (abnormal cry to pain) → 2 (grunts) → 1 (none)

GCS ≤8 is the clinical threshold for coma; ≤8 also mandates airway protection (jaw-thrust or recovery position at minimum; consider intubation if available). Serial GCS measurements track deterioration or improvement over time — a falling GCS is as important as the absolute value.

IMPORTANT: AVPU P/U ≈ GCS ≤8 — the coma threshold. AVPU P or U requires immediate airway management and urgent investigation regardless of other findings.

Systematic Assessment: ABCDE and the AEIOU-TIPS Framework

The systematic assessment of an unconscious child follows the ABCDE framework, performed simultaneously with targeted history-taking from the caregiver. The framework ensures that life-threatening problems are treated in priority order — airway before breathing before circulation before disability — and prevents the common error of becoming fixated on a diagnosis before the child is haemodynamically stable. It is important to understand that in a paediatric emergency, assessment and treatment are not sequential steps; they occur in parallel. While one team member manages the airway, a second establishes IV access and draws blood, a third takes history from the parent, and a fourth records observations. This simultaneous team approach is why structured frameworks exist — they allocate tasks by priority so that nothing is forgotten and no time is wasted. Even working alone, internalising the ABCDE sequence prevents the common failure of an inexperienced clinician spending five minutes trying to obtain history before securing an airway.

ABCDE rapid assessment:
• A — Airway: Is it patent? Tongue fall and secretions are the most common obstructions in a comatose child. Head-tilt chin-lift (or jaw-thrust if trauma is possible), suction if needed, recovery position.
• B — Breathing: Rate, depth, work of breathing. Central hypoventilation may indicate brainstem compression.
• C — Circulation: Heart rate, capillary refill time, skin perfusion, blood pressure. Shock worsens cerebral perfusion.
• D — Disability: AVPU or GCS, pupil size and reactivity (unilateral fixed dilated pupil = herniation), posture (decorticate vs decerebrate = structural lesion vs metabolic at higher vs lower brainstem level), BGL.
• E — Exposure: Full undress for fever, rashes (petechiae/purpura = meningococcaemia), signs of trauma, jaundice.

The most important single test at step D is the bedside blood glucose (BGL). Hypoglycaemia is both the most common and the most rapidly reversible cause of altered consciousness in children, and it is missed if not measured. Do not skip this test.

Once stabilised, the history from the caregiver drives the aetiological search. The AEIOU-TIPS mnemonic organises causes of coma into a systematic, memorable framework:
• A — Alcohol / Acidosis (metabolic acidosis from DKA, sepsis, inborn errors of metabolism)
• E — Epilepsy / Encephalopathy
• I — Insulin / hypoglycaemia (most common and most treatable — DON'T EVER FORGET to check BGL)
• O — Overdose / Opiates / Organophosphates (accidental poisoning in toddlers)
• U — Uraemia / renal failure
• T — Trauma / Temperature (hyperthermia, hypothermia)
• I — Infection (meningitis, encephalitis, cerebral malaria, septic encephalopathy)
• P — Psychogenic (rare in children; diagnosis of exclusion)
• S — Stroke / Structural (space-occupying lesion, raised ICP, cerebrovascular events)

Each category has clinical pointers that allow bedside prioritisation: a petechial rash points to meningococcaemia (I); a fever and neck stiffness to bacterial meningitis (I); a history of fasting + seizure to hypoglycaemia (I-for-insulin); dilated pupils and empty tablet strip to overdose (O); a bruised scalp to non-accidental injury or trauma (T).

AEIOU-TIPS Approach to the Unconscious Child