pediatric emergency conference guanzon guerrero guerzon guevarra guinto gutierrez hermoso icasas...
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Pediatric Emergency Conference
Guanzon Guerrero Guerzon Guevarra Guinto Gutierrez Hermoso Icasas Ignacio
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General DataMichael 3 week old male
Chief complaint: seizures
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History of Present Illness:
Gestational and Birth History: 25 year old primigravidUnremarkable prenatal and birth historyCS - due to CPDBW: 2.8 kgSpontaneous cry and respirationNursery Stay: 3 daysNewborn screening:
Positive for congenital adrenal hyperplasia- Advised confirmatory test and further work-up but was
not able to comply
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History of Present Illness:2 days PTC:
(+) 5x water stools(+) 3x vomiting of previously
ingested foodFew hours PTC:
- drowsy- generalized tonic-clonic
seizuresRushed to the ER
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Initial assessment at the ER:
Was in active seizures
afebrileCR: 180 bpmRR: 50-60 cpmBluish lips
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Initial management at the ER:Oxygen per mask was
administeredDiazepam 0.3 mg/kg/dose per IV
at 15 mins. Interval for 3 doses
(Seizure persisted)
Phenobarbital – loading dose
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Secondary assessment:Unremarkable chest and
abdomen(+) hypospadiasPenile length: 1.5 cmDarkly pigmented scrotal sac
Pulses were full and equalGood capillary refill
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Laboratory results:Lab tests Result Reference Value
Na 120
K 6.0
Hgt low
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Salient Features
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Differential DiagnosisPresenting manifestation: seizure
in a neonateSeizure: paroxysmal, time limited
change in motor activity and/or behavior that results from abnormal activity in the brain
Common in pediatric age groupNeonates are at particular risk for
the development of seizureNelson’s textbook of Pediatrics 17th edition
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Manifestations of a seizure:• Vocal: Cry or gasp, slurring of words, garbled
speech• Motor: Head or eye turning, eye deviation,
posturing, jerking (rhythmic), stiffening, automatisms (purposeless
repetitive movements such as picking at clothing, lip smacking); generalized or focal movements
• Respiration: Change in breathing pattern, cessation of breathing, cyanosis
• Autonomic: Pupillary dilatation, drooling, change in respiratory or heart rate, incontinence, pallor, vomiting
• Loss of consciousness or inability to understand or speak
Practice parameter: Evaluating a first nonfebrile seizure in childrenReport of the Quality Standards Subcommittee of the American Academy of Neurology, the Child Neurology Society, and the American Epilepsy SocietyD. Hirtz, MD; S. Ashwal, MD; A. Berg, PhD; D. Bettis, MD; C. Camfield, MD; P. Camfield, MD; P. Crumrine, MD; R. Elterman, MD; S. Schneider, MD; and S. Shinnar, MD, PhD
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Seizure
Infectious
causes:
Bacterial
Viral
Fungal
AfebrileFebrile
Seizure – like Events
•Benign Paroxysmal Torticollis of Infancy•Breath holding spells: - cyanotic spells - pallid spells•Shuddering attacks•Night terrors
• Metabolic disorders• Electrolyte
imbalance• Hypoglycem
ia• Hypoxia• Drug related
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Non-febrile seizure
Things to consider:Metabolic:
Congenital Adrenal HyperplasiaElectrolyte Imbalance:
diarrhea(5X) + vomiting (3x)Hypoxia:
bluish lips
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Seizuresresult from rapid abnormal electrical
discharges from cerebral neuronspresents clinically as involuntary alterations
of consciousness or motor activityConsumption of oxygen, glucose, and
energy substrates (e.g, ATP, phosphocreatine) is significantly increased in cerebral tissue during seizures.
Optimal delivery of these metabolic substrates to cerebral tissue requires adequate cardiac output and intravascular fluid volume.
Pediatric, Status Epilepticus; emedicine 2008
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Factors that lower Seizure ThresholdSleep deprivationHyperventilationPhotic stimulationInfectionMetabolic disturbancesHead traumaCerebral ischemiaKindling
Handbook of Neurosurgery by Greenberg
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Drugs which can cause seizures
Antibiotics◦Penicillins◦Isoniazid◦Metronidazole
Anesthetics, narcotics◦Halothane,
enflurane◦Cocaine,
fentanyl◦Ketamine
Psychopharmaceuticals◦Antihistamines◦Antidepressants◦Antipsychotics◦Phencyclidine◦Tricyclic
antidepressants
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Important points in the History The course of current seizure activity
◦ Time and nature of onset of seizure activity◦ Involvement of extremities or other body parts◦ Nature of movements (eg, eye movements, flexion,
extension, stiffening of extremities), including any focal movements and details of postictal neurologic deficit
◦ Incontinence◦ Cyanosis (perioral or facial)◦ Duration of seizure activity prior to medical attention◦ Mental status after cessation of seizure activity
Fever or intercurrent illnesses Prior history of seizures - If present, specify
medications, anticonvulsant use, and compliance.
Pediatric, Status Epilepticus; emedicine 2008
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Important points in the HistoryHead injury (recent and remote)CNS infection or disease (eg, meningitis,
neurocutaneous syndrome)Intoxication or toxic exposureOther CNS abnormality (eg, ventricular-
peritoneal shunt, prior CNS trauma)Birth history and developmental delay (eg,
anoxic encephalopathy, cerebral palsy)Other medical history (eg, acquired
immunodeficiency syndrome, systemic lupus erythematosus, type 1 diabetes mellitus)
Pediatric, Status Epilepticus; emedicine 2008
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Important points in the PE Signs of sepsis or meningitis
◦ Temperature more than 38.5°C; in patients younger than 2-3 months, more than 38.0°C
◦ Respiratory distress◦ Cyanosis◦ Poor peripheral perfusion◦ Bulging fontanelles in infant◦ Meningismus (in children >12-18 mo)◦ Presence of petechiae or purpura, herpetic vesicles
Evidence of head or other CNS injury◦ Bradycardia, tachypnea, and hypertension (Cushing triad for signs of
increased intracranial pressure)◦ Poor pupillary response◦ Asymmetry on neurologic examination◦ Abnormal posturing◦ Gross deformity or soft tissue injury to head
Hallmarks of neurocutaneous syndromes (e.g., port wine stain)
Pediatric, Status Epilepticus; emedicine 2008
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Monitoring of Vital FunctionsRespiratory rate, blood pressure,
cardiac rateObservation of seizure activitySkin bruises, petechiae or needle
marksPapilledema, retinal hemorrhagesOrganomegaly and abdominal
tenderness
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Status EpilepticusContinuous clinical or
electroencephalographic seizures lasting for at least 30 minutes or recurrent seizures without return of consciousness during interictal period: the series lasting for 30 minutes or more. It is a medical emergency.
Handbook of Medical & Surgical Emergencies, 6th edition
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Clinical Classification of Status Epilepticus
Overt generalized convulsive status
epileptus
Subtle generalized convulsive
status epilepticus
Simple status epilepticus
Nonconvulsive status
epilepticus
Continuous convulsive activity and intermittent convulsive activity without regaining full consciousness
•Convulsive (tonic-clonic)•Tonic•Clonic•Myoclonic
Coma following generalized convulsive status epilepticus with or without motor activity
Consciousness preserved
•Simple motor status epilepticus•Sensory status epilepticus•Aphasic status epilepticus
Consciousness impaired; twilight or fugue state
•Petit mal status (absence status)•Complex partial status epilepticus
Handbook of Medical & Surgical Emergencies, 6th edition
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EtiologiesFebrile seizuresCerebrovascular accidentsCNS infection IdiopathicEpilepsySubtherapeutic antiepileptic drugElectrolyte imbalanceDrug intoxicationAlcohol withdrawalTraumatic brain injuryAnoxiaTumor
Handbook of Neurosurgery by Greenberg
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Neonates (first month of life)
Early childhood (<6 y)
Children and adolescents (>6 y)
Birth injury (eg, anoxia, hemorrhage) and congenital abnormalities
Birth injury Birth injury
Metabolic disorders (eg., hypoglycemia, hypocalcemia, hyponatremia) and inborn errors of metabolism (eg., lipidoses, amino acidurias)
Febrile convulsions (3 mo to 6 y) Trauma
Infection (eg, meningitis) Infection Infection
Metabolic disorders Epilepsy with inadequate drug levels
Trauma Cerebral degenerative disease
Neurocutaneous syndromes Tumor
Cerebral degenerative diseases Toxins
Tumors Idiopathic
Idiopathic
Pediatric, Status Epilepticus; emedicine 2008
DIFFERENTIAL DIAGNOSIS
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In children < 1year age75% acute cause
30% electrolyte disorders28% secondary to CNS
infection19% associated with fever
Handbook of Neurosurgery by Greenberg
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Prolonged seizures are associated with cerebral hypoxia, hypoglycemia, and hypercarbia and with concurrent and progressive lactic and respiratory acidosis.
When cerebral metabolic needs exceed available oxygen, glucose, and metabolic substrates (especially during status epilepticus), neuronal destruction can occur and may be irreversible.
Hypoxia, hypercarbia, hyperthermia, tachycardia, hypertension, hyperglycemia, hyperkalemia, and lactic acidosis result from massive sympathetic discharge.
Pediatric, Status Epilepticus; emedicine 2008
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Prolonged seizures
Duration of seizure
Life threatening
systemicchanges
DeathTemporary
systemicchanges
Werner, MD; GTC SE in Children; University of Kentucky Hospital
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Respiratory
Hypoxia and hypercarbia◦ Ventilation (chest rigidity from muscle spasm)
◦Hypermetabolism ( O2 consumption, CO2
production)
◦Poor handling of secretions
Werner, MD; GTC SE in Children; University of Kentucky Hospital
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HypoxiaHypoxia/anoxia markedly
increase the risk of mortality in SE
Seizures (without hypoxia) are much less dangerous than seizures and hypoxia
Towne AR. Epilepsia 1994;35(1):27-34
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Neurogenic Pulmonary Edema
Rare complication of SE in children
Likely occurs as consequence of marked increase of pulmonary vascular pressure during SE
Johnston SC. Postictal pulmonary edema requires pulmonary vascular pressure increases. Epilepsia 1996;37(5):428-32
Johnston SC. Postictal pulmonary edema requires pulmonary vascular pressure increases. Epilepsia 1996;37(5):428-32
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Acidosis
RespiratoryLactic
◦ Impaired tissue oxygenation
◦ Increased energy expenditure
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Hemodynamics
Sympathetic overdrive ◦ Massive catecholamine /
autonomic discharge◦ Hypertension◦ Tachycardia◦ High CVP
Exhaustion Hypotension Hypoperfusi
on
Exhaustion Hypotension Hypoperfusi
on
0 min 60 min
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Cerebral blood flow - Cerebral O2 requirement
Blood pressure
Blood flow
O2 requirement
Seizure duration
Hyperdynamic Exhaustion
Lothman E. Neurology 1990;40(5 Suppl 2):13-23.
Hyperdynamic phase ◦ CBF meets CMRO2
Exhaustion phase◦ CBF drops as
hypotension sets in
◦ Autoregulation exhausted
◦ Neuronal damage ensues
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GlucoseG
luco
se
Seizure duration
30 min
SE
SE + hypoxia
Lothman E. Neurology 1990;40(5 Suppl 2):13-23.
Hyperdynamic phase ◦ Hyperglycemia
Exhaustion phase◦ Hypoglycemia
develops◦ Hypoglycemia
appears earlier in presence of hypoxia
◦ Neuronal damage ensues
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MortalityThe primary determinant of mortality
and morbidity of SE in children is its etiology
The greatest mortality and highest rate of neurological deficits occurs when SE is caused by an acute neurological condition (infection, trauma, stroke)
Mitchell WG. J Child Neurol 2002;17 Suppl 1:S36-43.
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Mean duration of SE in patients without neurologic sequelae is 1.5hours.
Mortality is lowest among children (~6%)subtherapeutic AEDsunprovoked SE
Highest Mortalityelderly patientsSE due to anoxia or CVA
Handbook of Neurosurgery by Greenberg
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MANAGEMENT
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Management
1. Control the seizure.2. Correct the electrolyte
imbalance3. Work-up and treatment of
Congenital Adrenal Hyperplasia4. Anticipatory Guidance
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General Initial Management of Seizure1. Assessment and control of the airways and
of ventilation, 2. ABG, ECG and blood pressure monitoring.3. Other measures include:
◦ i.v. glucose and thiamine as required,◦ emergency measurement of antiepileptic
drug levels, electrolytes and magnesium,
◦ a full haematological screen, ◦ measures of hepatic and renal function.The cause of the status should be identified urgently and may require treatment in its own right.
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Management: First line medication: BZPs. Second line medication:
Phenobarb > phenytoin (in patients under the age of 1-2 yrs.)
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Management: Other investigations and
management strategies include:
Stat ABG/VBG (with lytes, Hb, & lactate).
Full set of labwork including LFT’s, ammonia, urine and blood cultures.
Empiric antibiotics (if needed). Head U/S or CT
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Management of Hyponatremia
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Acute Hyponatremic Hypovolemia with Neurologic Symptoms
Treatment of choice is 3% hypertonic saline at 100 ml/h.◦ For each 100 ml of 3% hypertonic saline, serum sodium
concentration increase s by approximately 2 mmol/l. ◦ Duration of hypertonic saline treatment is based on the
improvement in the patient’s symptoms and signs.
Patients with acute hyponatremia◦ may be lethargic, disoriented, agitated, and have anorexia
and nausea . ◦ Physical findings: abnormal sensorium, pathological
reflexes, Cheyne-Stokes respiration, hypothermia, and seizures.
Severe symptoms: seizures, obtundation, and coma, ◦ 3% sodium may be infused at 4–6 ml/kg/h.
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Acute Hyponatremic Hypovolemia with Neurologic SymptomsThe immediate treatment of hyponatremic
seizures in neonates:◦ provide enough sodium in a 10-minute period to
elevate serum sodium level to 125 mEq/L by using 3% normal saline solution.
The amount of sodium required : (125 -?) x (0.6) x (wt kg) = X
mEq
?= patient’s serum sodium, 0.6 is the dilution constant, X = number of mEq to correct sodium level to 125
mEq.
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Treatment of CAH Patients suspected of 21-
hydroxylase deficiency should have the following bloodwork sent:
1. Electrolytes2. Glucose3. 17-hydroxyprogesterone levels4. Cortisol levels5. Aldosterone and renin levels.
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After drawing appropriate bloodwork:
1. Patients with dehydration, hyponatremia, or hyperkalemia should receive a bolus of isotonic crystalloid to restore volume.
2. Hypoglycemic patients should receive a dextrose bolus infusion.
3. Patients suspected of adrenal insufficiency should be treated with steroids empirically (i.e. rather than waiting for the results of confirmatory studies).
Treatment of CAH
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Treatment of CAH When administering steroids:
◦ Use an initial dose of HC 1-2 mg/kg IV (followed by q6h dosing) The disadvantage of
hydrocortisone is that it will confound any ACTH-Stim testing.
The advantage of hydrocortisone is that it is a complete steroid—with both glucocorticoid and mineralocorticoid activity.
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Glucocorticoids: hydrocortisone is the glucocorticoid of choice during childhood.◦ Longer-acting glucocorticoids, such as
prednisolone and dexamethasone, can be used in adults, but they are generally avoided in children because of concerns about growth suppression.
◦ Hydrocortisone is recommended in the pediatric population because of its lower potency, which permits easier titration of appropriate doses.
Mineralocorticoids: to control electrolytes and plasma renin activity. ◦ Mineralocorticoid replacement is achieved with
fludrocortisone.
Treatment of CAH
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Infants with salt-losing CAH often need sodium chloride supplementation. ◦ Routine salt supplementation is not usually needed
after the first 6-12 months of life. ◦ Additional salt intake may be needed with exposure to
hot weather or with intense exercise.
Treatment during physical stress, e.g. febrile illness, surgery, trauma:◦ Patients with classic CAH need increased, e.g.
doubling or tripling, doses of hydrocortisone.◦ Intravenous hydration may be required.◦ Hypoglycaemia may occur with exercise, illness or
fasting. Intake of carbohydrates and glucose should be increased.
Treatment of CAH
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All patients should wear or carry medical alert
identification specifying adrenal insufficiency.
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Etiopathogenesis
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Speiser, et al. New England Journal of Medicine, 2003
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Adrenal Crisis
Primary
Congenital Adrenal Hypoplasia/Aplasia
Congenital Adrenal Hyperplasia
Adrenal Hemorrhage
Adrenocorticotrophic Hormone unresponsiveness
Acute Illness
Adrenoleukodystrophy
Secondary
Differential Diagnosis
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Congenital Adrenal Hypoplasia
Acutely in the neonatal periodPrimarily affects boysMutation of DAX1Hypogonadotropichypogonadism
= cryptorchidism
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Adrenocorticotrophic Hormone UnresponsivenessNo salt losing manifestationsHypoglycemia, seizures and
hyperpigmentation in first decade of life
Marked adrenocortical atrophy with relative sparing of the zonaglomerulosa
Both sexes equally affected, autosomal recessive
Mutation in the gene for ACTH receptor
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Adrenal HemorrhageNeonatal period due to difficult
laborPresenting signs: abdominal
mass, anemia, unexplained jaundice or scrotal hematoma
May be due to an infection (ex. Tuberculosis, meningococcemia)
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AdrenoleukodystrophyAdrenocortical deficiency is
associated with demyelination in the CNS
Impaired β-oxidation in peroxisomes = levels of very long chain fatty acids found in tissues and body fluids
Rare autosomal recessive disorder in neonates
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Reserved slides
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Types of Status EpilepticusGeneralized Status
◦ Convulsive: generalized convulsive tonic-clonic status epilepticus (SE) is the most frequent type
◦ Absence◦ Secondarily generalized: accounts for ~75% of
generalized SE◦ Myoclonic◦ Atonic (drop attack): especially in Lennox-Gastaut
syndromePartial Status (usually related to anatomic
abnormality)◦ Simple (Epilepsy Partialis continuans)◦ Complex◦ Secondarily generalized
Handbook of Neurosurgery by Greenberg