good morning!. semantic qualifiers symptoms acute /subacutechronic localizeddiffuse singlemultiple...
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Good Morning!
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Semantic QualifiersSymptoms
Acute /subacute Chronic
Localized Diffuse
Single Multiple
Static Progressive
Constant Intermittent
Single Episode Recurrent
Abrupt Gradual
Severe Mild
Painful Nonpainful
Bilious Nonbilious
Sharp/Stabbing Dull/Vague
Problem Characteristics
Ill-appearing/Toxic
Well-appearing/Non-toxic
Localized problem Systemic problem
Acquired Congenital
New problem Recurrence of old problem
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Stridor• Harsh, high-pitched
resp sound• Usually inspiratory– But can be biphasic
• Cause by turbulent flow• Sign of upper airway
obstruction• NOT a diagnosis
Site of Pathology
Respiratory Rate
Retractions Audible Sounds
Extrathoracic airway
Stridor
Intrathoracic extra-pulmonary
Wheezing
Intrathoracic intrapulmonary
Wheezing
Alveolar interstitial
Grunting
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Stridor
• Viral croup
• Noninfectious croup
• Epiglottitis
• Bacterial tracheitis
• Extraluminal compression
• Intraluminal obstruction from masses
• Foreign body
• Retropharyngeal abscess
• Peritonsillar abscess
• Angioedema
• Caustic ingestion
• Vocal cord dysfunction
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“Croup”• Group of conditions – Acute and infectious causes of upper airway
inflammation • Upper airway of children
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Laryngotracheitis
• = most common “Croup” illness– Laryngotracheitis vs.
Laryngotracheobronchitis/pneumonitis
• Predisposing Factors – Between age 3 months and 5 yrs– Peak in 2nd year of life– M > F– Can occur anytime of year but peaks in late fall and
winter– Preceding URI illness
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Laryngotracheitis
• Pathophysiology– Inflammation involving the vocal cords and
structures inferior to the cords
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Laryngotracheitis
• Pathophysiology– Viral etiology is most common• Parainfluenza viruses (type 1, 2, and 3) ~ 75% of cases• Influenza A
– Associated with SEVERE disease
• Influenza B• Adenovirus• RSV• Measles
– Mycoplama pneumoniae rarely isolated
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Laryngotracheitis
• Clinical Presentation**– URI symptoms for 1-3 days prior to signs of upper
airway obstruction • Rhinorrhea, pharyngitis, mild cough, low-grade fever
– Characteristic “barking” cough, “seal-like”– Hoarseness– Inspiratory stridor– +/- fever
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Laryngotracheitis
• Clinical Presentation** – Symptoms characteristically worse at night – Agitation and crying aggravate symptoms– Varying degrees of respiratory distress on exam– Should not be hypoxic – this is a sign that
complete airway obstruction is imminent
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Laryngotracheitis
• Diagnosis – Clinical – Xrays• “Steeple sign” in
AP view• Do not correlate
with disease severity• Can help distinguish
from other causes
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Laryngotracheitis
• Treatment**– Most patients managed
as outpatients
– Cool mist??• Not proven in literature, but used since the 1900’s• If bronchospasm present, can worsen with cool mist
– Antibiotics not indicated in viral croup
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Laryngotracheitis
• Treatment**– Corticosteroids• Action: decrease laryngeal mucosal edema• Effective in reducing hospitalization rates, shorter
hospital stays, reduced need for subsequent interventions• Dose: 0.6mg/kg single dose DEXAMETHASONE (max
16mg)– PO/IM Decadron both effective – Clincal improvement 6 hours after dose – Prednisolone less effective than Dexamethasone
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Laryngotracheitis
• Treatment**– Nebulized racemic epinephrine (Vaponeb)
• For moderate to severe croup• Action: decrease laryngeal mucosal edema• Dose: 0.25ml-0.5ml of 2.25% racemic epi in 3ml of NS nebulized
– Onset of relief 10-30min– Duration of activity <2-3 hours– Can repeat q20 min– Monitor for symptoms once
the Vaponeb activity duration is over (rebound?), generally 3-4 hrs after a treatment
• Use caustiously in patients with tachycardia, and heart conditions such as TOF or ventricular outlet obstruction
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Laryngotracheitis
• Indications for hospitalization with croup– Progressive stridor– Severe stridor at rest– Respiratory distress– Hypoxia/cyanosis– Depressed mental status– Poor oral intake– Need for reliable observation
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Laryngotracheobronchitis/pneumonitis
• More severe form of croup• Considered an extension of laryngotracheitis
associated with bacterial superinfection– Occurs 5-7 days into the clinical course– New onset fever– Worsening clinical symptoms, toxic– Increased work of breathing• Signs of both upper and lower airway obstruction
• Requires empiric antibiotics
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FeatureAcute
LaryngotracheitisSpasmodic
Croup EpiglottitisBacterial Tracheitis
Prodrome URI
Mean Age 3 mo - 5 yr
Onset gradual
Fever variable
Hoarseness, barking cough Yes
Inspiratory stridorYes:
minimal to severe
Dysphagia No
Toxic appearance No
Etiology Viral
X-ray findings Steeple sign
Treatment
cool mist, racemic epi neb, dexamethasone
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Noninfectious Croup
• “Spasmodic” croup**– Most often children 1 to 3 yrs– Pathogenesis unknown – possible allergic etiology– Clinically similar to croup but without the viral
prodrome or fever– Most common in the evening– Sudden onset, preceded by mild cough or hoarseness– Episode of characteristic coughing, stridor and
respiratory distress, anxious– Severity improves over hours and can have repeat
episodes x1-2 more nights
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FeatureAcute
LaryngotracheitisSpasmodic
Croup EpiglottitisBacterial Tracheitis
Prodrome URInone or minimal
coryza
Mean Age 3 mo - 5 yr 1 to 3 yr
Onset gradual sudden
Fever variable no
Hoarseness, barking cough Yes Yes
Inspiratory stridorYes:
minimal to severeYes: usually moderate
Dysphagia No No
Toxic appearance No No
Etiology Viral Noninfectious
X-ray findings Steeple sign ---
Treatment
cool mist, racemic epi neb, dexamethasone cool mist
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Epiglottitis
• Predisposing Factors– Typical age of patients 2 to 4 yrs– Unimmunized
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Epiglottitis
• Pathophysiology– Prevaccine, most common cause:• Haemophilus influenzae type B
– Now, larger number of cases in vaccinated patients due to:• Streptococcus pyogenes• Streptococcus pneumoniae• Staphylococcus aureus
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Epiglottitis
• Pathophysiology– Inflammation of
epiglottis– Degree of
inflammation leads to degree of obstruction of airway
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Epiglottitis
• Clinical Presentation– Acute– High fever– Sore throat– Dyspnea– Rapidly progressing respiratory obstruction• Can be within hours – become toxic, difficulty
swallowing, labored breathing
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Epiglottitis
• Clinical Presentation– Drooling – Holding neck in hyperextended position– Tripod position– Stridor is a late finding!– Not usually associated with a cough
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Epiglottitis
• Diagnosis– Visualization via laryngoscopy • In controlled environment
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Epiglottitis
• Diagnosis– Xrays• “Thumb sign” in lateral view
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Epiglottitis
• Treatment**– Careful on exam**• Avoid anxiety-provoking procedures (labs/IV), avoid
placing patient supine or direct inspection of oral cavity• To prevent acute airway obstruction
– Medical emergency – Placement of artificial airway in controlled setting• Mortality ~6% without airway vs. <1% with airway
– Oxygen via mask until artificial airway • As long as mask doesn’t cause agitation
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Epiglottitis
• Treatment**– Antibiotics**• Ceftriaxone• Cefotaxime• Meropenem• Obtain cultures from blood, epiglottic surface, and if
needed from CSF (after obtain airway)• Treat with at least 7-10 antibiotics, but usually patient
improves after 2-3 days
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Epiglottitis
• Rifampin prophylaxis indicated for:– Any household contacts <48 months old and
incompletely immunized– Any household contacts <12 months old and has
not received primary vaccination series– Any immunocompromised child in the household
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FeatureAcute
LaryngotracheitisSpasmodic
Croup EpiglottitisBacterial Tracheitis
Prodrome URInone or minimal
coryza none or mild URI
Mean Age 3 mo - 5 yr 1 to 3 yr 2 to 4 yr (range 1 to 8 yr)
Onset gradual sudden rapid
Fever variable no High
Hoarseness, barking cough Yes Yes No
Inspiratory stridorYes:
minimal to severeYes: usually moderate
Yes: moderate to severe
Dysphagia No No Yes
Toxic appearance No No Yes
Etiology Viral NoninfectiousBacterial: Hib, Strep,
S. aureus
X-ray findings Steeple sign --- Thumb sign
Treatment
cool mist, racemic epi neb, dexamethasone cool mist
Intubation, Ceftriaxone, or Cefotaxime,
or Meropenem
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Bacterial Tracheitis
• Predisposing Factors– Mean age 5 to 7 yrs– M=F– Preceding viral respiratory
infection • Bacterial complication of
croup
– More common than epiglottitis in vaccinated patients
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Bacterial Tracheitis
• Pathophysiology– Mucosal swelling at the
level of the of the cricoid cartilage
– Complicated by copius, thick, purulent secretions, sometimes pseudomembranes
– Most common pathogen: S. aureus• Other organisms: Moraxella catarrhalis, nontype H.
influenzae, and anaerobic organisms
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Bacterial Tracheitis
• Clinical Presentation**– Preceding croup illness with cough– Then develops high fever and toxic-appearance– Differs from epiglottitis• Patient can lie down, does not drool, no dysphagia
– Differs from croup• More toxic, does not respond to racemic epi
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Bacterial Tracheitis
• Diagnosis– Clinical picture• Toxic + absence
of classic epiglottitis
– Xrays• Not necessary• Findings of irregular
lining of the tracheadue to pseudomembranes• Can have “steeple sign”
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Bacterial Tracheitis
• Treatment**– Artificial airway required in ~50-60% of patients– More likely to require intubation if younger
– Antibiotics• Including appropriate Staph coverage• Vanc + 3rd gen Cephalosporin = empiric coverage
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FeatureAcute
LaryngotracheitisSpasmodic
Croup EpiglottitisBacterial Tracheitis
Prodrome URInone or minimal
coryza none or mild URI URI/croup
Mean Age 3 mo - 5 yr 1 to 3 yr 2 to 4 yr (range 1 to 8 yr) 5 yr to 7 yr
Onset gradual sudden rapid acute after prodrome
Fever variable no High High
Hoarseness, barking cough Yes Yes No
Variable, with prodrome
Inspiratory stridorYes:
minimal to severeYes: usually moderate
Yes: moderate to severe
Yes:Variable
Dysphagia No No Yes No
Toxic appearance No No Yes Yes
Etiology Viral NoninfectiousBacterial: Hib, Strep,
S. aureus Bacterial: S. aureus
X-ray findings Steeple sign --- Thumb sign Irregular tracheal lining
Treatment
cool mist, racemic epi neb, dexamethasone cool mist
Intubation,Ceftriaxone, or Cefotaxime,
or Meropenem
Often intubation required,
Vancomycin and 3rd gen Cephalosporin
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Noon Conference!