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Pediatric Respiratory Pediatric Respiratory EmergenciesEmergencies
Pediatric Respiratory Pediatric Respiratory EmergenciesEmergencies
Mohammed Al Faifi, MD.Mohammed Al Faifi, MD.
Director, Emergency Out-Reach ProgramDirector, Emergency Out-Reach Program
King Faisal Specialist Hospital & Research King Faisal Specialist Hospital & Research Centre Centre
Riyadh, KSARiyadh, KSAKuwait, Oct. 2011Kuwait, Oct. 2011
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Pediatric Respiratory Pediatric Respiratory EmergenciesEmergencies
Part 1Part 1
Pediatric Respiratory Pediatric Respiratory EmergenciesEmergencies
Part 1Part 1Emergency Management Emergency Management
of Asthma of Asthma
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Data on visits to EDs by childrenData on visits to EDs by children
– – 1 -19 years of age with moderate/severe asthma1 -19 years of age with moderate/severe asthma
– – 3 months to 2 years of age with bronchiolitis3 months to 2 years of age with bronchiolitis
– – 3 months to 3 years of age with croup3 months to 3 years of age with croup
Knapp et al. Pediatrics 2008
QUALITY OF CARE OF ED RESPIRATORY ILNESSQUALITY OF CARE OF ED RESPIRATORY ILNESS
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ResultsResultsResultsResultsCorticosteroidsAntibioticsRadiographs
69% of the 405,000
visits for moderate/
severe asthma
31% of the estimated
317,000 annual
croup visits
53% of the estimated
228,000 annual visits
for bronchiolitis
72% of bronchiolitis
visits
32% of croup visits
Knapp et al. Pediatrics 2008
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ConclusionsConclusionsConclusionsConclusions
Physicians treating children with Asthma, bronchiolitis Physicians treating children with Asthma, bronchiolitis
and croup In USA Emergency Departments are and croup In USA Emergency Departments are under usingunder using known effective treatments and known effective treatments and overusingoverusing ineffective or unproven therapies and diagnostic tests.ineffective or unproven therapies and diagnostic tests.
Knapp et al. Pediatrics 2008
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Pediatric Respiratory Pediatric Respiratory EmergenciesEmergencies
Part 1Part 1
Pediatric Respiratory Pediatric Respiratory EmergenciesEmergencies
Part 1Part 1Emergency Management Emergency Management
of Asthma of Asthma
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IntroductionIntroductionIntroductionIntroduction
Asthma is the most common chronic disease Asthma is the most common chronic disease seen in childrenseen in children
Emergency department (ED) visits by children Emergency department (ED) visits by children with acute asthma are a common with acute asthma are a common occurrence occurrence
The overall goal of asthma care in the ED is to The overall goal of asthma care in the ED is to integrate with home, outpatient, and integrate with home, outpatient, and inpatient care whenever possible inpatient care whenever possible
Recognition of high-risk patients with acute Recognition of high-risk patients with acute asthma is essential.asthma is essential.
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HistoryHistoryHistoryHistory
Initial history is brief, focusedInitial history is brief, focused• Duration of symptomsDuration of symptoms• Severity of symptomsSeverity of symptoms• Medication use Medication use
More comprehensive history followsMore comprehensive history follows• TriggersTriggers • FeverFever• Systemic Review Systemic Review
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Past Medical HistoryPast Medical HistoryPast Medical HistoryPast Medical History
Previous wheezingPrevious wheezing
Prior admissions for wheezingPrior admissions for wheezing
Prior admissions to ICUPrior admissions to ICU
Chronic lung diseaseChronic lung disease
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Physical ExaminationPhysical ExaminationPhysical ExaminationPhysical Examination
Level of consciousnessLevel of consciousness
Vital signsVital signs
Degree and symmetry of wheezingDegree and symmetry of wheezing
Inspiratory and expiratory ratioInspiratory and expiratory ratio
Accessory muscle useAccessory muscle use
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Differential DiagnosisDifferential DiagnosisDifferential DiagnosisDifferential Diagnosis
BronchiolitisBronchiolitis
Foreign body aspirationForeign body aspiration
Gastroesophageal refluxGastroesophageal reflux
Cystic fibrosisCystic fibrosis
AnaphylaxisAnaphylaxis
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Pulmonary Index Score*Pulmonary Index Score*Pulmonary Index Score*Pulmonary Index Score*
ScoreScoreR.R*R.R*WheezingWheezing††I/E RatioI/E RatioAcc.Muscle Acc.Muscle
use use OO22 Sat.Sat.
00<< 30 30NoneNone2:12:1NoneNone99-10099-100
1131 - 4531 - 45End expirationEnd expiration1:11:1++96 -9896 -98
2246 - 6046 - 60Entire Entire expirationexpiration
1:21:2++++93- 9593- 95
33> 60> 60Inspiration and Inspiration and expiration expiration without without stethoscopestethoscope
1:31:3++++++< 93< 93
* For patients aged 6 or older: through 20, score 0; 21 through 35, score 1; 36 through 50, score 2; > 50, score 3.† If no wheezing due to minimal air entry, score 3.
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Pulse OximetryPulse OximetryPulse OximetryPulse Oximetry
Noninvasive and inexpensiveNoninvasive and inexpensive
Can help to predict the need for Can help to predict the need for hospitalizationhospitalization
Obtain for moderately to severely ill Obtain for moderately to severely ill childrenchildren
Supplement with oxygen if SaSupplement with oxygen if SaOO22 < <
92%92%
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CXRsCXRsCXRsCXRs
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CXRs for First Time WheezersCXRs for First Time WheezersCXRs for First Time WheezersCXRs for First Time Wheezers 371 children > age 1371 children > age 1 94% CXRs normal94% CXRs normal 20/21 abnormal films would have 20/21 abnormal films would have
been identified by: been identified by: • RR > 60RR > 60
• HR> 160HR> 160
• FeverFever
• Focal examFocal examGerschel, N Engl J Med 1983
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Chest RadiographsChest RadiographsChest RadiographsChest Radiographs
Focal findingsFocal findings
FeverFever
Severe diseaseSevere disease
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Treatment OptionsTreatment OptionsTreatment OptionsTreatment Options
BetaBeta22--agonists agonists • Inhaled (nebulizer vs. metered-dose inhaler) Inhaled (nebulizer vs. metered-dose inhaler) • Subcutaneously Subcutaneously • IntravenouslyIntravenously
Corticosteroids Corticosteroids • OrallyOrally • NebulizedNebulized• IntramuscularlyIntramuscularly• IntravenouslyIntravenously
Ipratropium bromideIpratropium bromide Magnesium sulfateMagnesium sulfate
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BetaBeta22-Agonist Delivery-Agonist DeliveryBetaBeta22-Agonist Delivery-Agonist Delivery
BetaBeta22--agonists remain the standard of agonists remain the standard of
care for treatment of acute asthmacare for treatment of acute asthma
They should be administered every 20 They should be administered every 20 mins, in the first hour of caremins, in the first hour of care
Delivery by SVN or MDI with holding Delivery by SVN or MDI with holding chamber are each reasonable optionschamber are each reasonable options
Steps should be taken to insure optimal Steps should be taken to insure optimal drug deliverydrug delivery
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BetaBeta22-Agonist Optimizing Delivery-Agonist Optimizing Delivery BetaBeta22-Agonist Optimizing Delivery-Agonist Optimizing Delivery
Small particlesSmall particles
MouthpieceMouthpiece
Low inspiratory flow rateLow inspiratory flow rate
Breath-holdingBreath-holding
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Ipratropium BromideIpratropium BromideIpratropium BromideIpratropium Bromide
An anticholinergicAn anticholinergic
Low lipid solubilityLow lipid solubility
Less than 1% absorbedLess than 1% absorbed
Safe, inexpensiveSafe, inexpensive
Most studies show that IB plus a Most studies show that IB plus a BetaBeta22 agonist agonist
is superior to is superior to BetaBeta22 agonist alone agonist alone
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Ipratropium BromideIpratropium BromideIpratropium BromideIpratropium Bromide
Group 1A, PA, PA, P
Group 2A, IA, PA, P
Group 3A, IA, IA, I
02040
Time (mins.)
Schuh, et al. J.Pediatrics 1995;126:639-645Schuh, et al. J.Pediatrics 1995;126:639-645
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Ipratropium BromideIpratropium BromideIpratropium BromideIpratropium Bromide
Ipratropium plus Ipratropium plus BetaBeta22 agonist is superior to agonist is superior to
BetaBeta22 agonist alone agonist alone
Multi-dose ipratropium is superior to single Multi-dose ipratropium is superior to single dosedose
Safe, inexpensiveSafe, inexpensive
Peak effects are in 40-60 minutesPeak effects are in 40-60 minutesSchuh, et al. J.Pediatrics 1995;126:639-645Schuh, et al. J.Pediatrics 1995;126:639-645
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Ipratropium Bromide Ipratropium Bromide RecommendationsRecommendationsIpratropium Bromide Ipratropium Bromide RecommendationsRecommendations
For children with a moderate or moderate-toFor children with a moderate or moderate-to--severe severe
exacerbation or for those already receiving exacerbation or for those already receiving BetaBeta22 agonist agonist
therapy therapy ::
• 250-500250-500 ug of ipratropium bromide by ug of ipratropium bromide by
nebulization to be administered concurrently with nebulization to be administered concurrently with
the albuterol treatmentsthe albuterol treatments
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Scarfone, et al,Scarfone, et al, Pediatrics 1993; 92: 513-518 Pediatrics 1993; 92: 513-518Scarfone, et al,Scarfone, et al, Pediatrics 1993; 92: 513-518 Pediatrics 1993; 92: 513-518
Randomized, double-blind, placeboRandomized, double-blind, placebo
75 children in the ED with a moderate to 75 children in the ED with a moderate to
severe asthma attacksevere asthma attack
2mg/kg oral prednisone vs. placebo2mg/kg oral prednisone vs. placebo
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Scarfone, et al Scarfone, et al Scarfone, et al Scarfone, et al
Oral CorticosteroidsOral Corticosteroids::
Decreases hospitalization rateDecreases hospitalization rate
Effective within 4 hoursEffective within 4 hours
Augments Augments BetaBeta22--agonistsagonists
therapytherapy
Conclusions:Conclusions:
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Oral vs IV Steroid Oral vs IV Steroid Oral vs IV Steroid Oral vs IV Steroid
Randomized, double-blinded, placeboRandomized, double-blinded, placebo
49 Children in ED with moderate to 49 Children in ED with moderate to severe acute asthmasevere acute asthma
2mg/kg methylprednisolone: Oral vs IV2mg/kg methylprednisolone: Oral vs IV
Barnett, et al. Ann Emerg Med, 1997; 29 :212-217
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Barnett, et al.Barnett, et al.Barnett, et al.Barnett, et al.
After 4 hours, there were no differences After 4 hours, there were no differences between the two groups with respect to:between the two groups with respect to:
• Hospitalization rateHospitalization rate
• FEV1FEV1
• Pulmonary index scorePulmonary index score
• Oxygen saturationOxygen saturation
• Respiratory rateRespiratory rate
•ResultsResults
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Oral Prednisone vs. Oral DexamethasoneOral Prednisone vs. Oral Dexamethasone
533 children in ED with mild, moderate, or severe asthma
All got q 20 min RA and IB, in first hour Prednisone - 2 mg/kg in ED - 1 mg/kg for 4 days Dexamethasone
- 0.6 mg/kg in ED - 0.6 mg/kg for 1 dose, on day 2
Qureshi F .J Pediatrics 2001
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Oral Prednisone vs Oral DexamethasoneOral Prednisone vs Oral Dexamethasone
Pred.Pred. Dex.Dex.
Admit, from ED 12% 11% Admit, from ED 12% 11%
Relapse 7% 7%Relapse 7% 7%
Admit, after relapse 17% 20% Admit, after relapse 17% 20%
Symptoms at 10 days 21% 22% Symptoms at 10 days 21% 22%
Vomited in ED Vomited in ED 3% 0.3 3% 0.3
Noncompilance Noncompilance 4% 0.44% 0.4
Qureshi F .J Pediatrics 2001
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Moderate AsthmaModerate AsthmaTreatment RecommendationsTreatment Recommendations
Moderate AsthmaModerate AsthmaTreatment RecommendationsTreatment Recommendations
BetaBeta22 agonists may be delivered by SVNs or MDIs agonists may be delivered by SVNs or MDIs with holding chamberswith holding chambers
Ipratropium bromide should be given as a single Ipratropium bromide should be given as a single dose or concurrently with first 3 dose or concurrently with first 3 BetaBeta22 agonist agonist treatmentstreatments
Prednisone should be given early ASAPPrednisone should be given early ASAP -If emesis • Methylprednisolone IV • Dexamethasone: orally or IM
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Albuterol nebulization or Albuterol nebulization or MDI MDI
PrednisonePrednisone11
OO22 If Pulse Ox If Pulse Ox << 92% 92% Albuterol q20-30 mins.Albuterol q20-30 mins.
Ipiatropium with albuterol Ipiatropium with albuterol
Marked Marked ImprovementImprovement
No improvementNo improvement
Discharge Discharge homehome
HospitalizeHospitalize
Continue albuterol q30 Continue albuterol q30 mins.mins.
Slightly Slightly improvedimproved
DispositiDispositionon
Management of Moderate Asthma
Management of Moderate Asthma
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DispositionDispositionDispositionDisposition
Discharge :Discharge : PEF > 70% predicted, PEF > 70% predicted, Symptoms are minimal or absent, Symptoms are minimal or absent, Sufficient medications can be prescribed and Sufficient medications can be prescribed and
maintainedmaintained Outpatient care can be established within a several-Outpatient care can be established within a several-
days time framedays time frame EDUCATION.. EDUCATION..
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DispositionDispositionDispositionDisposition
Observed for 30 to 60 minutes for symptom Observed for 30 to 60 minutes for symptom recurrencerecurrence
hospitalization :hospitalization : prior history of a sudden, severe exacerbation prior history of a sudden, severe exacerbation prior intubation or ICU Admissionprior intubation or ICU Admission ≥ ≥ two hospitalizations in the past year two hospitalizations in the past year current steroid use or recent wean from steroids current steroid use or recent wean from steroids medical or psychiatric comorbidity medical or psychiatric comorbidity low socioeconomic status or urban residence low socioeconomic status or urban residence
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POST EMERGENCY DEPARTMENT CAREPOST EMERGENCY DEPARTMENT CAREPOST EMERGENCY DEPARTMENT CAREPOST EMERGENCY DEPARTMENT CARE
Short-term MedicationsShort-term Medications
- Beta-agonist Therapy - Beta-agonist Therapy
- Corticosteroids - Corticosteroids
- Inhaled steroids- Inhaled steroids
Education Education
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Pulmonary Index Score*Pulmonary Index Score*Pulmonary Index Score*Pulmonary Index Score*
ScoreScoreR.R*R.R*WheezingWheezing††I/E RatioI/E RatioAcc.Muscle Acc.Muscle
use use OO22 Sat.Sat.
00<< 30 30NoneNone2:12:1NoneNone99-10099-100
1131 - 4531 - 45End expirationEnd expiration1:11:1++96 -9896 -98
2246 - 6046 - 60Entire Entire expirationexpiration
1:21:2++++93- 9593- 95
33> 60> 60Inspiration and Inspiration and expiration expiration without without stethoscopestethoscope
1:31:3++++++< 93< 93
* For patients aged 6 or older: through 20, score 0; 21 through 35, score 1; 36 through 50, score 2; > 50, score 3.† If no wheezing due to minimal air entry, score 3.
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Severe AsthmaSevere AsthmaSevere AsthmaSevere Asthma No wheezing 3No wheezing 3
Unable to speak Unable to speak
Dyspnea 2Dyspnea 2
Markedly prolonged expiratory phase Markedly prolonged expiratory phase 33
Significant work of breathing withSignificant work of breathing with
Retractions 2Retractions 2
Requires oxygen 3Requires oxygen 3
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Severe AsthmaSevere AsthmaSevere AsthmaSevere Asthma
Oxygen (consider non-rebreather)Oxygen (consider non-rebreather)
Inhaled beta2-agonistInhaled beta2-agonist
Inhaled ipratropium bromideInhaled ipratropium bromide
Intravenous corticosteroids ASAPIntravenous corticosteroids ASAP
Initial managementInitial management
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OxygenOxygenOxygenOxygen Simple face maskSimple face mask
• An oxygen flow rate of 6-10 An oxygen flow rate of 6-10 L/min should provide an L/min should provide an oxygen concentration of 35-oxygen concentration of 35-60%60%
• Limitations: open exhalation Limitations: open exhalation ports allow for the inspiration ports allow for the inspiration of room air and exhaled of room air and exhaled carbon dioxide is rebreathedcarbon dioxide is rebreathed..
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OxygenOxygenOxygenOxygen Non. re-breathing face maskNon. re-breathing face mask
Modifications allow for greater oxygen Modifications allow for greater oxygen delivery to the patient. These delivery to the patient. These include:include:
Exhalation ports serving as one-Exhalation ports serving as one-way valves.way valves.
A reservoir bag with a one-way A reservoir bag with a one-way valve that diverts oxygen-poor valve that diverts oxygen-poor exhaled gases thereby exhaled gases thereby maintaining a mix of almost pure maintaining a mix of almost pure oxygen.oxygen.
With flow of 10-12 L/min and With flow of 10-12 L/min and proper fitting mask, oxygen proper fitting mask, oxygen concentrations > 90% can concentrations > 90% can usually be achieved.usually be achieved.
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Subcutaneous TerbutalineSubcutaneous TerbutalineSubcutaneous TerbutalineSubcutaneous Terbutaline
Uncooperative, anxious young childrenUncooperative, anxious young children
Very poor inspiratory flow or aerationVery poor inspiratory flow or aeration
Poor response to initial nebulized albuterolPoor response to initial nebulized albuterol
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Continuously Nebulized AlbuterolContinuously Nebulized AlbuterolContinuously Nebulized AlbuterolContinuously Nebulized Albuterol
AdvantagesAdvantages::
• Easier to adhere toEasier to adhere to
• Less respiratory therapy timeLess respiratory therapy time
• SafeSafe
• May benefit sicker patientsMay benefit sicker patients DisadvantagesDisadvantages::
• Patients may go unobservedPatients may go unobserved
• Claustrophobic maskClaustrophobic mask
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CorticosteroidsCorticosteroidsCorticosteroidsCorticosteroids
IV Methylprednisolone ASAPIV Methylprednisolone ASAP
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Magnesium SulfateMagnesium SulfateMagnesium SulfateMagnesium Sulfate
Is It SafeIs It Safe
• Mild side effects during infusion:Mild side effects during infusion:
Facial flushing, nausea, dry mouth, malaiseFacial flushing, nausea, dry mouth, malaise
• Significant adverse effects have not been Significant adverse effects have not been reportedreported
• Hypotension and cardiac conduction Hypotension and cardiac conduction disturbances are seen only with serum disturbances are seen only with serum magnesium levels > 8 mg/dlmagnesium levels > 8 mg/dl
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Magnesium SulfateMagnesium SulfateMagnesium SulfateMagnesium Sulfate ConclusionsConclusions
• The routine administration of magnesium to The routine administration of magnesium to moderately to severely ill asthmatic children moderately to severely ill asthmatic children as an adjunct to initial treatment with albuterol as an adjunct to initial treatment with albuterol and corticosteroids was not efficacious.and corticosteroids was not efficacious.
• Future studies will be needed to determine the Future studies will be needed to determine the optimal optimal dosedose of magnesium, the optimal of magnesium, the optimal duration duration of infusion, and the subgroup of of infusion, and the subgroup of asthmatic children most likely to benefit from asthmatic children most likely to benefit from magnesium.magnesium.
• Severely ill asthmatics experience the greatest Severely ill asthmatics experience the greatest benefit from magnesiumbenefit from magnesium
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IV IV BetaBeta22 Agonists AgonistsIV IV BetaBeta22 Agonists Agonists
Recommendations:Recommendations:
• Not recommended as a first-line agent Not recommended as a first-line agent even for severely ill childreneven for severely ill children
• For severely ill who are poorly For severely ill who are poorly responsive to initial measuresresponsive to initial measures
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IV TerbutalineIV TerbutalineIV TerbutalineIV Terbutaline 1010 ug/kg over 10 minutes; infusion 0.5 ug/kg over 10 minutes; infusion 0.5
ug/kg/minug/kg/min
Increase by 0.2 ug/kg/min to max of Increase by 0.2 ug/kg/min to max of 5ug/kg/min5ug/kg/min
Largely empiric Largely empiric titrate to effecttitrate to effect
Expect side effects at therapeutic dosesExpect side effects at therapeutic doses
Decrease infusion rate by 50% if patient is Decrease infusion rate by 50% if patient is receiving theophyllinereceiving theophylline
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IV IV BetaBeta22 Agonists Agonists Potential ToxicitiesPotential ToxicitiesIV IV BetaBeta22 Agonists Agonists
Potential ToxicitiesPotential Toxicities TachycardiaTachycardia
DysrhythmiaDysrhythmia
HypertensionHypertension
Myocardial Myocardial ischemiaischemia
HyperglycemiaHyperglycemia
HypokalemiaHypokalemia
RhabdomyolysisRhabdomyolysis
Lactic acidosisLactic acidosis
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Severe Asthma Severe Asthma Severe Asthma Severe Asthma
Arterial blood gasArterial blood gas
HelioxHeliox
IntubationIntubation -ketamine-ketamine -Decompress stomache-Decompress stomache -Beware of barotrauma-Beware of barotrauma -Permissive hypercapnia-Permissive hypercapnia -Low tidal volumes and peak pressures -Low tidal volumes and peak pressures -Slow rate, no PEEP, I/E ratio=1/3 -Slow rate, no PEEP, I/E ratio=1/3 Inhaled nitic oxideInhaled nitic oxide Nakagawa et al, J Pediatr 2000Nakagawa et al, J Pediatr 2000
Other Considerations
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Supplemental Oxygen
Vital Signs & oxygen saturation
Severe Status Asthmaticus
IV Terbutaline infusion
2mg/kg IV Methylprednisolone
0.01cc/kg of subcutaneous terbutaline
Continue with approach to moderately ill patient
0.15mg/kg albuterol by nebulization 250-500 micgm Ipratropium Bromide
Continuously nebulized albuterol
75mg/kg IV Magnesium sulfate
Good response
Poor response
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Clinical Role of MDI’sClinical Role of MDI’sClinical Role of MDI’sClinical Role of MDI’sWhen used with a (mask) spacer device,When used with a (mask) spacer device,
multiple pediatric studies show MDImultiple pediatric studies show MDI
effectiveness comparable to nebulization therapyeffectiveness comparable to nebulization therapy
• • Chou et al. Arch Pediatr Adolesc Med 1995Chou et al. Arch Pediatr Adolesc Med 1995
• • Williams et al. Pediatr Emerg Care 1996Williams et al. Pediatr Emerg Care 1996
• • Leversha et al. J Pediatr 2000Leversha et al. J Pediatr 2000
• • Delgado et al. Arch Pediatr Adolesc Med 2003Delgado et al. Arch Pediatr Adolesc Med 2003
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MDI / Spacer TipsMDI / Spacer TipsMDI / Spacer TipsMDI / Spacer Tips• • 10 puffs or detergent wash to eliminate electrostatic charge 10 puffs or detergent wash to eliminate electrostatic charge
of of new spacernew spacer
– – Avoids initial 70% delivery reductionAvoids initial 70% delivery reduction
• • Shake MDI before each puff, administer 1 puff at aShake MDI before each puff, administer 1 puff at a
time one minute apart, 5 tidal breaths per pufftime one minute apart, 5 tidal breaths per puff
– – 6 puffs / rx for acute exacerbation (Q 20” x 3)6 puffs / rx for acute exacerbation (Q 20” x 3)
– – 2 puffs / rx for maintenance (Q 3-6 hours)2 puffs / rx for maintenance (Q 3-6 hours)
• • Count total puffs per MDI (200 std.)Count total puffs per MDI (200 std.)
– “– “shake” or “float” tests unreliableshake” or “float” tests unreliable
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Dexamethasone in AsthmaDexamethasone in Asthma
• • Random, non-blinded, 3-16 years, N = 42Random, non-blinded, 3-16 years, N = 42
• • IM dexamthasone, 0.3 mg/kg (up to 15IM dexamthasone, 0.3 mg/kg (up to 15
mg), effective as 3 day course of oralmg), effective as 3 day course of oral
prednisone, 2 mg/kg/dayprednisone, 2 mg/kg/day
• • Oral dexamethsone 0.6 mg/kg (up to 16Oral dexamethsone 0.6 mg/kg (up to 16
mg) x 2 days vs. pred x 5 days. Similarmg) x 2 days vs. pred x 5 days. Similar
efficacy fewer side effects.efficacy fewer side effects.
Klig et al. J Asthma 1997 and Qureshi et al. J Klig et al. J Asthma 1997 and Qureshi et al. J Pediatr 2001Pediatr 2001
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Magnesium SulfateMagnesium Sulfate
• • Bronchodilation through smooth Bronchodilation through smooth musclemuscle
relaxationrelaxation
• • Inhibits cellular calcium uptakeInhibits cellular calcium uptake
• • Inhibits histamine releaseInhibits histamine release
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Mg IV vs. PlaceboMg IV vs. Placebo
• • RCT (double blind), placebo, 1-18 yrs,RCT (double blind), placebo, 1-18 yrs,
N=54N=54
• • Mg 75 mg/kg IV over 20 minutes vs.Mg 75 mg/kg IV over 20 minutes vs.
placebo after 1st albuterolplacebo after 1st albuterol
• • No different in PFTs or admit rateNo different in PFTs or admit rate
• • No adverse effects or BP changes with No adverse effects or BP changes with MgMg
Scarfone et al. Ann Emerg Med 2000Scarfone et al. Ann Emerg Med 2000
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IV Magnesium Sulfate in AsthmaIV Magnesium Sulfate in Asthma
• • Meta-analysis of 5 RCTs (with placebo)Meta-analysis of 5 RCTs (with placebo)
• • 182 pediatric patients with moderate to severe182 pediatric patients with moderate to severe
asthmaasthma
• • Received beta agonists and steroidsReceived beta agonists and steroids
• • Mg prevents hospitalization (NNT = 4)Mg prevents hospitalization (NNT = 4)
• • Short term PFTs and clinical scores improvedShort term PFTs and clinical scores improved
• • ? Dose, 25-75 mg/kg over 20 minutes? Dose, 25-75 mg/kg over 20 minutes
Cheuk et al. Arch Dis Child 2005Cheuk et al. Arch Dis Child 2005
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PICU Case ReportsPICU Case Reports
• • 3 children in status asthmaticus3 children in status asthmaticus
• • Maximized traditional therapyMaximized traditional therapy
• • Failure to improve after 2-3 hoursFailure to improve after 2-3 hours
• • BiPAP delivered an average of 12-17 hoursBiPAP delivered an average of 12-17 hours
• • Resolution of hypercarbia, and improvedResolution of hypercarbia, and improved
clinical stateclinical state
• • 2/3 used continuous IV ketamine as adjunct2/3 used continuous IV ketamine as adjunct
Olugbenga A, et al. Pediatr Crit Care Med 2002Olugbenga A, et al. Pediatr Crit Care Med 2002
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Factors Associated with LongFactors Associated with Long
Asthma TherapyAsthma Therapy
• • Previous ICU admitPrevious ICU admit
• • Baseline sat ≤ 92%Baseline sat ≤ 92%
• • Higher ( 6 / 9 ) clinical asthma score at four hoursHigher ( 6 / 9 ) clinical asthma score at four hours
• • 4 hour sat ≤ 92%4 hour sat ≤ 92%
• • 4 hour albuterol more often than q1 hour4 hour albuterol more often than q1 hour
• • If none, 82% chance short therapy onlyIf none, 82% chance short therapy only
• ≥ • ≥ 3 predictors 92% chance long therapy3 predictors 92% chance long therapy
Keogh et al. J Pediatr 2001Keogh et al. J Pediatr 2001
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