Presenting History
In children presenting with acute flaccid paralysis secondary to suspected Guillain-Barré Syndrome (Acute Inflammatory Demyelinating Polyradiculoneuropathy - AIDP), systematically delineate the ascending course, antecedent triggers, autonomic instability, and life-threatening respiratory muscle compromise.
- Motor Weakness (Onset & Progression):
- Onset & Course: Acute, progressive, symmetrical ascending flaccid weakness starting in lower limbs (difficulty climbing stairs, rising from floor, or unsteady gait), progressing over hours to days to involve upper limbs?
- Nadir of Weakness: Time taken from onset to maximum weakness (typically reached within 2 to 4 weeks; $>90\%$ reach nadir within 4 weeks)?
- Proximal vs Distal: Is weakness predominantly symmetrical, involving both proximal and distal muscle groups?
- Antecedent Trigger (1 to 4 Weeks Prior):
- History of acute gastrointestinal illness (watery or bloody diarrhea, Campylobacter jejuni)?
- History of upper respiratory tract infection, influenza-like illness, CMV, EBV, or recent vaccination?
- Sensory Symptoms & Neuropathic Pain:
- Severe, agonizing muscular pain, leg cramping, lower back pain, or radicular pain in thighs and calves (prominent early feature in children)?
- Distal paresthesias, tingling, or "pins and needles" sensation in fingers and toes ("glove and stocking" distribution)?
- Cranial Nerve Involvement (Miller Fisher / Bulbar Variants):
- Facial weakness: Inability to close eyes tightly, food pooling in cheeks, drooling (bilateral lower motor neuron facial nerve palsy)?
- Bulbar symptoms: Dysphagia, nasal regurgitation, coughing during swallowing, hoarseness of voice (IX, X palsy)?
- Extraocular weakness: Diplopia, ptosis, or ophthalmoplegia (Miller Fisher Syndrome triad: ataxia, areflexia, ophthalmoplegia)?
- Respiratory Compromise (Impending Respiratory Failure):
- Tachypnea, breathlessness while talking, single-breath count $<15-20$, paradoxical abdominal breathing (inward movement of abdomen on inspiration indicating diaphragmatic paralysis), weak ineffective cough?
- Autonomic Dysfunction:
- Fluctuating sinus tachycardia or bradycardia, labile blood pressure, postural dizziness, profuse sweating, episodic flushing, or urinary retention/constipation?
Negative History (3C 1D Framework)
| Category | Pertinent Negative Question | Rationale / Significance |
|---|---|---|
| Causes | Heavy Metal / Toxin: No history of lead, arsenic, or organophosphate exposure. Injections / Trauma: No intramuscular gluteal injections preceding weakness. Tick Bite: No outdoor forest exposure or tick bites. | Rules out toxic polyneuropathies. Excludes traumatic injection sciatic nerve injury. Excludes tick paralysis (rapidly reversible flaccid paralysis). |
| Complaints (Differentiating) | Acute Transverse Myelitis (ATM): No distinct sensory level on trunk, no early permanent bladder incontinence, no spasticity/extensor plantars. Acute Poliomyelitis / Enteroviral Paralysis: No high fever at onset of paralysis, no marked asymmetry, no isolated patchy single limb involvement. Myasthenia Gravis: No prominent diurnal variation (fatigability worsening toward evening), normal deep tendon reflexes. | Differentiates spinal cord pathology. Differentiates anterior horn cell infection. Differentiates neuromuscular junction disorder. |
| Complaints (Differentiating Cont.) | Hypokalemic Periodic Paralysis: No history of sudden flaccid paralysis resolving within 24 hours following carbohydrate-rich meal; normal serum potassium. Diphtheritic Polyneuropathy: No history of unimmunized status, membranous pharyngitis, or palatal paralysis occurring 4-6 weeks after sore throat. | Differentiates channelopathy/hypokalemia. Excludes post-diphtheritic exotoxin neuropathy. |
| Complications | Invasive Mechanical Ventilation: Document whether child developed acute respiratory acidosis or required emergency endotracheal intubation. Aspiration Pneumonia: No sudden choking with fever, productive cough, or focal crepitations. | Evaluates respiratory failure status. Assesses aspiration risk from bulbar incompetence. |
Other Relevant History
- Immunization History: Complete immunization status (OPV/IPV, DTP, MMR).
- Bladder & Bowel Habits: Inquire regarding transient urinary hesitancy or retention (typically transient; persistent bladder involvement strongly favors transverse myelitis).
- Family History: Family history of hereditary motor sensory neuropathies (Charcot-Marie-Tooth) or periodic paralysis.
History Summary
"Master/Miss `Patient Name`, a `Age` old `male/female` child, previously healthy and fully immunized, presented with a `Duration in days` history of acute, progressive, symmetrical ascending flaccid weakness starting in the lower limbs and advancing to the upper limbs and trunk, accompanied by severe calf pain and distal paresthesias, occurring `1 to 3` weeks following an episode of `diarrheal illness / acute respiratory infection`, without a sensory level, persistent bladder involvement, fever at the onset of paralysis, or diurnal fatigability.
In view of the acute, rapidly progressive, post-infectious symmetrical ascending flaccid quadriparesis with neuropathic pain and areflexia, I would like to consider a provisional diagnosis of Acute Flaccid Paralysis secondary to Guillain-Barré Syndrome (Acute Inflammatory Demyelinating Polyradiculoneuropathy - AIDP), Brighton Collaboration Diagnostic Criteria Level 1/2, currently progressing / at nadir, with / without bulbar or respiratory compromise."
General & Head-to-Toe Examination
- Child General Appearance: Supine, unable to roll over or sit unsupported; distress level and vocal strength.
- Vitals & Autonomic Monitoring:
- Heart rate (resting sinus tachycardia, bradycardia, or wide fluctuations).
- Blood pressure (orthostatic hypotension or paroxysmal hypertension).
- Respiratory rate, single-breath count (normal $>20$ in a single expiration), work of breathing.
- Respiratory Mechanics Bedside Assessment:
- Paradoxical abdominal movement (inward abdominal motion on inspiration indicates diaphragmatic weakness).
- Inability to cough forcefully or clear secretions.
- Cranial Nerves:
- CN VII: Bilateral lower motor neuron facial weakness (incomplete eye closure, bell phenomenon, flat nasolabial folds).
- CN IX, X: Palatal ascent, gag reflex, swallowing water test, nasal speech.
- CN III, IV, VI: Extraocular movements, ptosis, pupillary reactivity.
Systemic Examination
Motor System
- Inspection & Nutrition: Muscle bulk normal (no acute atrophy); no fasciculations.
- Tone: Marked flaccidity / hypotonia in all four limbs (lower limbs $>$ upper limbs).
- Power: Symmetrical weakness; assess Medical Research Council (MRC) grade:
- Upper limbs: Proximal (deltoids, biceps) and distal (wrist flexors/extensors, hand grip).
- Lower limbs: Proximal (iliopsoas, quadriceps) and distal (tibialis anterior, gastrocnemius).
- Reflexes:
- Deep Tendon Reflexes (DTR): Generalized areflexia or marked hyporeflexia (biceps, triceps, supinator, knee, and ankle jerks absent).
- Superficial Reflexes: Abdominal reflexes absent; plantar responses flexor or absent (never extensor).
Sensory System
- Pain / hyperesthesia on calf squeeze; vibration and proprioception (position sense) may be impaired in large fiber demyelination; pain and temperature usually preserved; absence of a definite sensory level on trunk.
Cerebellar & Autonomic
- Coordination: Ataxia out of proportion to weakness in Miller Fisher variant.
- Autonomic: Palmar sweating, labile BP, heart rate variability on ECG.
Final Summary & Diagnosis
"A `Age` old `male/female` child presenting with acute post-infectious symmetrical ascending lower motor neuron quadriparesis, with clinical examination demonstrating generalized hypotonia, flaccid weakness (MRC Power Grade `.../5`), generalized areflexia, bilateral lower motor neuron facial nerve paresis, and absent sensory level, with / without autonomic instability, and preserved respiratory mechanics.
My final clinical diagnosis is Acute Post-Infectious Flaccid Quadriparesis secondary to Guillain-Barré Syndrome (AIDP variant), Brighton Diagnostic Criteria Level 1, Hughes Functional Disability Scale Score `...`, requiring close autonomic/respiratory monitoring and emergent IVIG / Plasmapheresis therapy."