Case 19: 16mo - Seizure Flashcards
diffdx of unresponsiveness in children
COMMON
- toxic ingestion
- seizure
- syncope
- closed head injury
- infection
LESS COMMON
- intracranial process
- intussusception
- SEVERE dehydration
unresponsiveness: Toxic ingestion in kids
- age group
- etiology
- management
- age group = 9mo-3yo
- etiology = altered mental status (opiates, benzos, clonidine), metabolic disturbance (hypoglycemia)
- management = careful hx of all meds in the home and where the child spends his time
unresponsiveness: seizure
- age group
- etiology
- timing
- management
“paroxysmal neurologic events” == generalized/seizures
- age group = common in children (esp.
- etiology = metabolic disturbance, head trauma, developmental / genetic abnormalities of the brain; post-traumatic seizure; idiopathic
- timing: some will have only 1, some ongoing (epilepsy)
- management = antipyretics
unresponsiveness: syncope
- age group
- etiology
- timing
- management
age group: 1-3yo
Etiology: BREATH-HOLDING: CYANOTIC
- timing = precipitating event ==> vigorous crying + hyperventilation ==> prolonged expiratory apnea ==> transient hypoxia ==>child becomes pale/cyanotic ==> brief LOC, limpness
+/- brief generalized seizure due to hypoxia
+/- asystole
- management = self resolve, no associated post-ictal state; symptomatic as needed
Etiology: Cardiac
- supraventricular arrhythmia (tachycardia), ventricular arrhythmia (d/t prolonged QT syndrome) ==> decreased cerebral blood flow ==> Syncope
unresponsiveness: closed head injury
- age group
- etiology
- timing
- management
- age group = any
- etiology = fall, ran into something, INFLICTED
+/- intracranial injury
+/- witnessed traumatic event - timing
- management = CT without contrast ==> concerns of bleeding
unresponsiveness: infection
- age group
- etiology
- timing
- management
initial sxs = fever, irritability
==> no return to baseline; remain impaired
ETIOLOGY = meningitis
- 30-40% of meningitis present with seizure
ETIOLOGY = encephalitis
- fever, seizure == Enteroviral, herpes simplex
ETIOLOGY = sinus infection ==> abscess
- hx of URI.
unresponsiveness: intracranial process
- age group
- etiology
- timing
- management
sxs = seizures, global alterations in mental status
prodrome: HA, behavioral change, vomiting
- etiology = brain tumor
- timing = brain tumors = most common solid tumors in childhood
unresponsiveness: intussusception
- sxs
= telescoping / prolapsing of a portion of the intestine within an adjacent portion (usual terminal ileum into the colon)
sxs = repeated episodes of colicky pain ==> intervening lethargy with near unresponsive state
+/- intravascular volume depletion d/t vomiting & third-spacing of fluids ==> leading to further mental status changes
distinguishing seizure v. seizure-like activity
SEIZURE = excessive neuronal activity in the brain
- hx of alteration of consciousness / LOC
- incontinence
- deviation of the eyes
- post-ictal state
- rhythmic motor movements that cannot be stopped by touching/holding the child
- Prodrome = unusual behavior; aura / “premonition” prior to onset
NOT SEIZURES =
==> “seizure” is distractible; the event couldbe interrupted
- motor tics
- myoclonus
- GERD (Sandifer’s syndrome)
- pseudoseizures/ psychogenic seizures = physical manifesetation of a psychological disturbance
define: epilepsy
> /= 2 unprovoked seizures
prevalence = 1% throughout childhood
what is the most common solid tumors in childhood
brain tumors (1200 cases / year), esp in posterior fossa
where does intussusception usually happen?
usual terminal ileum into the colon
what is the most common type of seizure seen in children?
generalized tonic clonic seizure
types of seizures
- generalized tonic clonic seizure
- simple partial seizure
- complex partial seizure
- childhood absence epilepsy (petit mal seizure)
- atonic (akinetic) seizure
describe the seizure: generalized tonic clonic seizure
- most common type in children
1) tonic (rigid) stiffening of all extremities and upward deviation of the eyes
2) clonic jerks of all extremities
3) flaccid +/- urinary incontinence
4) post-ictal phase
describe the seizure: simple partial seizure
motor signs in a single extremity or on one side of the body
==> can spread to become more generalized
describe the seizure: childhood absence epilepsy (petit mal seizure)
timing: ANY age
sxs ==> last 30s - 2 min
*** altered consciousness
- localized eyes =
glassy eyed
- localized mouth = lip-smacking, drooling, gurgling
- localized abdomen = N/V
- automatisms = quasi-purposeful motor / verbal behaviors that are repeated inappropriately and commonly accompany complex partial seizures
2)post-ictal phase = confusion, sleepiness, headache
==> 30% secondary generalization
EEG = 3-Hz spike and wave pattern
describe the seizure: atonic (akinetic) seizure
loss of motor tone
when a parent says “my child is lethargic” should you be worried?
if the parent uses medical lethargy = serious alteration of mental status, suggesting diagnoses of meningitis / toxic ingestion
layman’s lethargy = more tired / less active than usual
how accurate is a tactile temperature?
80% of cases == subjective meets objective definition of fever >38 C, 100.4 F
describe the seizure: febrile seizure
more common with temp > 100.4F
Age: 6mo-5yo
- most are developmentally normal ==> viral infection (benign, prodrome, self-limited); meningitis and encephalitis (severe)
- if febrile seizure + abnormalities in neurodevelopmental maturation ==> serious underlying illness
- if febrile seizure + pre-existing developmental abnormalities ==> risk factor for subsequent epilepsy
what would make a child with a febrile seizure more at risk for developing epilepsy later?
1) + pre-existing developmental abnormalities
2) one febrile seizure ==> 0.5-1% above baseline population risk
3) esp. with early, recurrent febrile seizures
4) family hx of epilepsy
5) complex febrile seizures
are febrile seizure hereditary?
yes, according to twin studies
- Genetic loci= 8q13-21 (often called FEB1),
19p (FEB2), 2q 23-24 (FEB3)
- different modes of inheritance == autosomal dominant, polygenic, multifactorial
a child comes in with a severe fever. to what degree should you consider whether he has a serious bacterial illness (SBI)?
un/under-immunized = 1-5% risk of SBI (less than expected d/t to herd immunity; higher prevalence of viral illnesses)
Mgmt:
1) CBC with WBC, differential
2) blood culture == when risk of disease is low, but burden of disease is high ==> to help r/out badness (e.g. bacterial meningitis)
what is a childhood example of an illness where risk of disease is low, but burden of disease is high?
- etiology
- signs & sxs
- dx
- mgmt
- complications
bacterial meningitis
- increasingly uncommon d/t immunization; herd immunity
==> potentially serious ==> should be included in differential diagnosis of all febrile children with altered mental status (lethargy, irritability, seizure). - etiology = <2yo (E. coli, GBS, Listeria); 2-12yo (S. pneumoniae, N. meningitidis)
- signs & sxs = increasing lethargy, irritability, meningeal irritation (nuchal rigidity, meningismus), systemic (fever, anorexia, poor feeding, sxs of URI, myalgias, tachycardia)
- dx =
- mgmt
1) empiric high dose IV antibiotics == 3rd gen cephalosporin + vanco for 7-14d [then narrow as needed]
2) CSF culture
Complications
- stroke
- subdural effusions
- SIADH secretion
- developmental delays
- seizures
- hearing loss
- (RARE) death
infant with meningeal signs
- mgmt
lethargic
bulging fontanelle
child with meningeal signs
- mgmt
bending neck / knees ==> pain [Kernig]
[Brudinski] - bend neck ==> hips and knees bend
1) if older = CT
NMDA encephalitis
Sxs= subacute onset of seizures, confusion, memory loss, and/or behavioral change
Etiology = autoimmune, paraneoplastic,
Mgmt = steroids
when to do a lumbar puncture
- tumor = for antineoplastic antibodies (esp. ALL, lymphoma), for which you can’t get a tissue
- infectious
what is the risk of recurrence of febrile seizures?
if first febrile seizure <12mo = 50% recurrence risk
if first febrile seizure >12mo = 30% recurrence risk
what is the long-term risk of recurrent simple febrile seizures
none