pediatric respiratory emergency : lung
TRANSCRIPT
PEDIATRIC RESPIRATORY EMERGENCIES : DISEASE OF LUNGBy Duangruethai Tunprom, MD. 3rd years emergency medical resident, PMK hospital
outline
Upper airway obstruction & infection Lower airway obstruction Disease of the lung
Pneumonia
Diagnosis by Clinical sign & symptom CXR
Limit diagnostic test
WHO Published guidelines for clinical diagnosis
pneumonia Tachypnea & retraction as indicator of lower
respiratory disease Tachypnea
> 50 /min in pt < 1year > 40 /min in pt > 1year
Manifestration Cough , wheezing, nasal flaring, retraction,
grunting, use accessory muscle
Pneumonia(cont.)
40/1000 in preschool ages 7/1000 in 12 -15 years Male > female = 2 : 1 Viral pneumonia 60 -90 % of all
pneumonia Except neonate bacterial pneumonia
predominate Immunocompromised host mixed &
opportunistic infection
Pneumonia (cont.)
Passively acquired maternal antibodies Protection against S. pneumoniae & H.
influenzae During 1st few months of life
Altered protective mechanisms increase risk developing pneumonia Congenital anatomic abnormality Immune deficiencies Neurologic alteration predispose to aspiration Alteration in quality of secreted mucus (cystic
fibrosis)
Cough may aid diagnosis Staccato & paroxysmal cough in infant Caused Chlamydia trachomatis
Hacking quality Caused from Mycoplasma infection
Pneumonia syndromes
Bacterial viral Chlamydia Mycoplasma
Historical Age Fever Onset
AnyHigh(>39 c)Abrupt, often after URI
AnyLow grade Gradual
4-16 wksUsually noneGradual
5-18 yrsLow gradual
CoughAssociated symptoms
ProductiveChest painFocal infarct
NonproductiveMyalgia, rash, sore throat, coryza
StaccatoConjunctivitis
Hacking, headache, rash, sore throat
Physical Lung
Toxic appearanceConfined rales
Diffuse ralesWheezingStridor
Diffuse ralesRare wheez
Unilateral rales
Pneumonia syndromes
Bacterial viral Chlamydia Mycoplasma
Chest radiograph Infiltration Pleural effusion Other
Lobar or segmentalOccasionalPneumatocelleAbscess
Interstitial
RareHyperinflationAtelectasis
Diffuse interstitialNoneHyperinflation
Lobar or diffuse
Rare
Lab Increased WBC granulocytosis
Normal or increase WBC countLymphocytosis
Normal WBC countEosisnophilia
Normal WBC count
Pathogens(common)
Streptococcus pneumoniae, Haemophilus influenzae, Staphylococcus aureus
RSV, Parainfluenzae, Influenza, Adenovirus, Enterovirus
Chlamydia trachomatis
Mycoplasma pneumoniae
Bacteria pneumonia
Streptococcus pneumoniae M/C of bacterial pneumonia
Previous M/C H. influenzae incidence decrease 90 % since onset
effective immunization Now occur in older children
S. pneumoniae & H. influenzae Associate pleural effusion 25 -75 % Bacteremia 75 – 95 %
Group A streptococcal pneumonia Occur as a complication of varicella Typical severe illness Abrupt onset Rapid progression to toxicity High fatality rate 30 – 60 %
standard CXR for diagnosis of pneumonia : 2-view plain chest radiograph
may not differentiate between viral disease and bacterial disease.
left lower lobe infiltrate
Bacterial pneumonia Round pneumonia on
chest radiographs should raise suspicion for a bacterial etiology, particularly Streptococcus pneumoniae and Staphylococcus aureus
Mark I Neuman, MD, MPH, Assistant Professor of Pediatrics:Pediatrics, Pneumonia: Differential Diagnoses & Workup.Harvard Medical School; Attending Physician, Division of Emergency Medicine, Children's Hospital Boston;Oct 21, 2010.
Viral pneumonia
viral pneumonias, 4 common radiographic findings were detected:
1. parahilar peribronchial infiltrates2. Hyperexpansion3. segmental or lobar atelectasis4. hilar adenopathy
Mycoplasma pneumonia
M pneumoniae, 3 radiographic patterns 1. peribronchial and perivascular interstitial
infiltrates2. patchy consolidations3. homogeneous acinar consolidations like
ground-glass
consolidation in the lingula and small left pleural effusion
Chlamydial pneumonia
Chlamydia pneumoniae pneumonia.
(Courtesy of Dr. Atsushi Nambu, Department of Radiology, University of Yamanashi, Yamanashi, Japan.)
PA CXR shows : poorly defined consolidation and ground-glass opacities in the left lower lobe.
Pertussis
Classic symptoms of pertussis paroxysmal cough, inspiratory whoop, and
vomiting after coughing. The cough from pertussis has been
documented to cause subconjunctival hemorrhages, rib fractures,
urinary incontinence, hernias, post-cough fainting, and vertebral artery dissection
Aspirate pneumonia
Aspiration Pneumonia ImagingAuthor: Jaw Lee, MD, Staff Physician, Department of Emergency Medicine, King-Drew Medical CenterContributor Information and DisclosuresUpdated: Dec 17, 2008
Aspirate pneumonia
Aspiration Pneumonia ImagingAuthor: Jaw Lee, MD, Staff Physician, Department of Emergency Medicine, King-Drew Medical CenterContributor Information and DisclosuresUpdated: Dec 17, 2008
location depends on the patient position often gravity dependent
Generally the right middle and lower lung lobes : M/C sites due to the larger caliber more vertical orientation of the right
mainstem bronchus
Pneumonia in immunocompromised host picture
Antibiotics for treatment of pediatric pneumonia
Age group Agent Outpatient treatment
Inpatient treatment
0 – 12 wks Group B streptococcusGram negative bacilli
(Listeria monocytogenes)
Bordetella pertussis or Chlamydia trachomatis
Erythromycin estolate
Ampi +Cefotaxime or CeftriaxoneErythromycin
estolate
12 wks – preschool age
Streptococcus pneumoniae
(Haemophilus influenzae,Staphylocooccus
aureus,Group A streptococcus, Neisseria meningitidis)
Mycoplasma pneumoniae or
Chlamydia pneumoniae
MRSA or clinically ill
Amoxicillin-clavulanic acidOr Cefuroxime Or Azithromycin
Or Clarithromycin
Add ErythromycinOr Azithromycin
Or Clarithromycin
CefuroximeOr CefotaximeOr CeftriazoneOr Clindamycin
Add ErythromycinOr Azithromycin
Or Clarithromycin
Add Vancomycin
School age to adolescent
Mycoplasma pneumoniae or
Chlamydia pneumoniae
MRSA or clinically ill
ErythromycinOr Azithromycin
Or ClarithromycinOr Tetracycline(>8
yrs)Or Fluoroquinolone
(>16yrs)
CefuroximeOr CefotaximeOr CeftriazoneOr ClindamycinAnd Macrolide
Add Vancomycin
Antibiotics for treatment of pediatric pneumonia
Age group Agent Outpatient treatment
Inpatient treatment
0 – 12 wks Group B streptococcusGram negative
bacilli (Listeria monocytogenes)
Bordetella pertussis or Chlamydia trachomatis
Erythromycin estolate
Ampi +Cefotaxime or CeftriaxoneErythromycin
estolate
Ceftriaxone is contraindication in infants age < 1 month old
Antibiotics for treatment of pediatric pneumonia
Age group Agent Outpatient treatment
Inpatient treatment
12 wks – preschool age
Streptococcus pneumoniae
(Haemophilus influenzae,Staphylocooccus
aureus,Group A streptococcus, Neisseria meningitidis)
Mycoplasma pneumoniae or
Chlamydia pneumoniae
MRSA or clinically ill
Amoxicillin-clavulanic acidOr Cefuroxime Or Azithromycin
Or Clarithromycin
Add Erythromycin
Or AzithromycinOr
Clarithromycin
CefuroximeOr CefotaximeOr CeftriazoneOr Clindamycin
Add Erythromycin
Or Azithromycin
Or Clarithromycin
Add Vancomycin
Antibiotics for treatment of pediatric pneumonia
Age group Agent Outpatient treatment
Inpatient treatment
School age to adolescent
Mycoplasma pneumoniae or
Chlamydia pneumoniae
MRSA or clinically ill
ErythromycinOr Azithromycin
Or Clarithromycin
Or Tetracycline(>8
yrs)Or Fluoroquinolone
(>16yrs)
CefuroximeOr CefotaximeOr CeftriazoneOr ClindamycinAnd Macrolide
Add Vancomycin
Management
Infant < 2 mo Infant 2 -3 mo Infant & children > 3 mo
Management : Infant < 2 mo
3 factors in directing management Patient’s age Likely pathogen Degree of illness Age < 2 mo with pneumonia Admit
Immunological immature Sign of sepsis may be subtle Blood urine CSF C/S
Ampicillin + Aminoglycoside
Management : Infant 2 -3 mo
Blood & urine C/S Ampicillin + 3rd gen Cephalosporin(Ceftriaxone is contraindication in infants age < 1 month old)
If C.trachomatis & B.pertussis Erythromycin Other macrolide, sulfonamide
Management : Infant & children > 3 mo
1st line : Amoxicillin & Amoxicillin-clavulonic acid
If resistant S.pneumoniae Cefuroxime High dose Amoxicillin( 80-100 mg/kg/day)
Management : School age to adolescent
1st line : Macrolide M/C pathogen :
Mycoplasma pneumoniae Chlamydia pneumoniae
Outpatient reevaluate
F/U 24 – 48 hrs If have sign of bacteremia
Single dose IM ceftriaxone Follow by oral therapy
Indication for hospitalization
Toxic appearance Vomiting or
dehydration Respiratory
compromise Distress Hypoxia Inadequate
ventilation
Multilobar disease Pleural effusions Impaired immune
function Unstable social
environment Age < 6 months
F/U •Clinical 2-3 wks after diagnosis•CXR 6-8 wks
Complication of pneumonia
Pleural effusion, emphysema
Hypoxia, progressive respiratory failure with multiorgan failure
Apnea without other symptom in infants < 3 months Viral Chlamydial pertussis
M/C dehydration Additional infection
foci result from bacteremia : Meningitis Epiglottitis Pericarditis septic arthritis soft tissue infection
Local Systemic
Noninfectious causes that may present as pneumonia
Noninfectious causes that may present as pneumonia
Noninfectious causes that may present as pneumonia
Other respiratory emergencies Cystic fibrosis Chronic lung disease
Cystic fibrosis
Autosomal recessive Mutation in CF
transmembrane conductance regulator (CTFR)
Incidence 1 /2500 Present :
Hispanic Native americans African American Asians
Progressive lung disease & infection
Most morbidities & Nearly all mortality
Defects in Chloride transport across airway epitheliam Reduced ciliary clearance of thickened
mucus Decrease antimicrobial effect of the
airway surface Increase bacterial adherence Innate secretion of inflammatory
cytokines
Cystic fibrosis
CXR Emphysema Peribronchial
thickening Bronchiectasis Focal infiltration
Treatment Acute exacerbation
Oral or IV penicillin () Or Ceftazidime
+Aminoglycoside Clearance thick mucoid
secretion May response
bronchodilator, mucolytics (inhaled N-acetyl cysteine)
Short term inhaled corticosteroid•Duration 10-14 days•Careful antibiotic : cover MRSA,•If previous antistaph prophylaxis : cover Pseudomonas•If Burkholderia cepacia significant increase mortality in CF
Chronic lung disease
Chronic lung disease (CLD) of infantcy = bronchopulmonary dysplasia Common in premature infants Affects 40% of children with a birth weight < 1000
g Severity related to
Degree of prematurity Use peripartum steroids Damage incurred by ventilation in the neonatal period Nutritional status
Chronic lung disease
Treatment Prevention
Influenza vaccine : All of infants 6-23 month during appropriate season
Heptavalent pneumococcal vaccine & H.influenzae vaccine type B
Monoclonal immunoglobulin palivizumab : Monthly prophylaxis against RSV
Inhaled bronchodilator Becareful : hypoxia & hypercabia
Thank you
From 7th ed Rosen’s emergency medicine ,2010 Mark I Neuman, MD, MPH, Assistant Professor of Pediatrics :
Pediatrics, Pneumonia: Differential Diagnoses & Work up. Harvard Medical School; Attending Physician, Division of Emergency Medicine, Children's Hospital Boston;Oct 21, 2010.