1. TATA LAKSANA Asma Berat- Prof Syamsu
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S y a m s uSubbagian Alergi Imunologi
Bagian Ilmu Penyakit Dalam FK UNHASMakassar
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The case no. 1Emma is a 38-year-old woman who has had asthma since infancy. She was occasionally admitted to hospital in childhood, but her asthma became less troublesome in adolescence.She continued to need regular low-dose inhaled corticosteroids. She reported a marked worsening of her symptoms after the birth of her first child. In the past 3 years, she has used inhaled combination therapy in the form of fixed-dose salmeterol (50 mg) and fluticasone(500 mg), taken twice daily, and has still needed quick-relief bronchodilators on average 2 or 3 times per day. She awakens with asthma symptoms about once a week and is unable to participate in fitness classes because of wheezing.Over the past year, Emma has had 4 exacerbations for which prednisone therapy was required. One of the exacerbations was sufficiently severe to require a visit to an emergency department, but she was not admitted to hospital.
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Question :1. Is it diagnosis true Bronchial asthma ?2. How about level of severity and Control status3. What are the cause of refractory in this
patients ?4. What are suggest in the management this
patient?
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PENDAHULUAN
Asma merupakan kata sederhana mengungkap sindromyang heterogen dan sangat kompleks.
Predisposisi yang sangat banyak, jalur kejadian yang bervariasi, jenis dan jumlah sitokin yang terlibat sangatbanyak. serta respon terhadap pengobatan sangatbervariasi masih perlu telaahFaktor pencetus beraneka ragam dan pemberat cukupbanyak.
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Phenotypic heterogeneity of asthma♣Allergic vs Non-allergic♣Early-onset vs Late-onset♣Severity (resistance to treatment)♣Aspirin intolerance♣Occupation♣Environment♣Exercise-induced♣Exacerbation-prone♣Eosinophilic vs Neutrophilic♣Menses-related
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Component
of
Severity
Classification of Asthma Severity (>12 yrs)
IntermittentPersistent
Mild Moderate Severe
Symptoms <2 d/wk>2 d/wk
but not dailyDaily
Throughout the day
Nighttime awakening
<2 d/mo 3-4x/mo>1x/wk but not nightly
Often 7x/wk
SABA use <2 d/wk
>2 d/wk
but not daily &
not >1x on any day
DailySeveral times
per day
Interference with activity
NONE Minor limitation Some limitationExtremely
limited
Lung function
• Normal FEV1
between
exacerbations
• FEV1: >80%
predicted
• FEV1/FVC:
normal
• FEV1 : >80%
predicted
• FEV1/FVC: normal
• FEV1: >60% but
<80% predicted
• FEV1/FVC:
reduced 5%
• FEV1: <60%
• FEV1/FVC:
reduced 5%
RISK Exacerbations requiring oral steroids
0-1/yr ≥2/yr
Consider severity and interval since last exacerbation as
they may fluctuate over time in any severity category
Recommended Treatment Step
Step 1 Step 2 Step 3 Step 4 or 5
Imp
air
me
nt
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TERMINOLOGY
Names for difficult asthma Severe refractory asthma
Difficult to control asthma
Brittle asthma
Severe asthma
Therapy-resistant asthma
Steroid-dependent asthma
NSAID hypersensitivity asthma
Poorly controlled asthma
Irreversible asthma
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When is a severe acute episode happening?• Limited ability to speak• Pulsus paradoxus > 25mmHg• Pulse >110/min• RR >25-30/min• Flow rates <50% predicted• O2 saturation <91-92%• Some consider flow rates < 35% predicted
to be life-threatening
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CLINICAL DANGER SIGNS
Use of accessory muscle of respirationBrief fragmented speechInability to lie spineProfound diaphoresisAgitationSevere symptoms that fail to improve initial emergency
department
•Life threatening airway obstruction can STILL OCCURwhen there signs are not present
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DON’T EVEN WAIT IF :
1. Inability to :a. Maintain respiratory effortb. Cyanosisc. Depressed mental status
2. All three foreshadow imminent respiratory arrest3. DON’T WAIT INTUBATE
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DIAGNOSIS
Hx : Prior intubation for asthma attackPex: Alteration of consciousness, fatigue, upright posture,
diaphoresis, accessory muscle breathing,tachycardia, tachypnea, pulsus paradoxusIMPORTANT : look in the mouth : obstruction may bein the upper airway (epiglottis, angioedema)
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No. GEN POLIMORFISME BERHUBUNGAN DENGAN
FENOTIP
PUSTAKA
1 Interleukin 4
(IL-4)
C-589T FEV1 < 50 %
Asma fatal atau hampir fatal
Nat Immunol. 2010 July;
11(7): 577–5842 Interleukin 4 reseptor-ɑ (IL-4RA) Q576R Obstruksi saluran napas berat Nat Immunol. 2010 July;
11(7): 577–5843. Adrenergic reseptor ß2 (ADR-ß2) R16G Asma malam
Asma tergantung steroid
Tak terkait asma fatal
Respir Res. 2008; 9(1): 4.
The
Pharmacogenomics
Journal (2001) 1, 27–
374 Adrenergic reseptor ß2 (ADR-ß2) A16G Resisten terhadap tiotropium bromida Allergy Asthma Immunol
Res. 2010 July;2(3):177-
182.5 Tumor Necrosis Factor ɑ (TNF-ɑ) A-308G Asma berat
Tak terkait asma fatal
The Pharmacogenomics
Journal (2006) 6, 311–326.
6 Leukotriene-C4
Synthase (LTC4S)
A-444C Asma Intoleran Aspirin Curr Opin Pulm
Med. 2009;15(1):57-62.
7 cysteinyl leukotriene receptor 1
((CYSLTR1)
C-945T dan T927C Resiten terhadap antileukotrin Curr Opin Pulm
Med. 2009;15(1):57-628 Theophylline metabolism (CYP
IA2)
G-2964T Theophylline intoxication J Manag Care Pharm.
2007;13(6):497-5059 Interleukine 13 (IL-13) C-1112T Resisten terhadap antileukotrin Nat Rev Immunol 2008 ,
8:169-182
10. glucocorticoid receptor (NR3C1) D641V, G679S, V729I,
and I747M
Resisten terhadap steroid
Terkait asma fatal pd negro
Allergy Asthma Immunol
Res. 2010 July;2(3):177-
182.11. Corticotropin releasing hormone
receptor 1 (CRHR1)
GAT Resistensi terhadap steroid Curr Opin Pulm
Med. 2009;15(1):57-62.
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Sel mastMakrofagEosinofilLimfosit TNeutrofilBasofilTrombosit
Sel neuron
Sel epitelMiofibroblastSel endotelSel otot polos
MEDIATOR
BronkokonstriksiEksudasi plasma
Hipersekresi mukusHiperresponsif sal.napas
Perubahan struktur
HistaminLipid mediator
SitokinPeptida
Faktor pertumbuhan
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Airway obstruction
HyperinflationUneven ventilation
Work of breathing
Wasted ventilation V/Q mismatchingVO2 ,VCO2
Hypoxemia, hypercapnia
Respiratory acidosisMetabolic acidosis
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Lungmorphogenesis
Fetal lung Immunologicaldevelopment
ExternalenvironmentPrenatal
Neonatal lung
Tissue remodeling Airway inflammation
External environment(viruses, allergens, tobacco smoke)
Immunological development(Th1 and Th2 cells)
Vulnerableairway structure
AtopyVirus -related Atopywheeze
ASTHMA
Bronchial Hyperresponsiveness
(BHR)Persistent inflammation
Viruses, allergens,
tobacco smoke,
air pollution,
exercise,
cold air, irritants
“Epithelial-mesenchymal trophic unit”
Injury, repair, remodelling
BHR
PERSISTENT ASTHMAAdulthood
PUBERTY
Age 3-5 years
Birth
Natural history of asthma
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NATURAL HISTORY OF ASTHMA
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Gbr 2. Inflammatory
Mediators and cell
types in the
pathogenesis of
airway remodeling in
asthmatic patients.
Asthma associa-
ted inflammation
primarily involves Th2
and Th17 pathway.
MCP1, Monocytes
chemoatractan
Protein 1; MIP-1a,
Macrophage
Inflammatory protein
1a
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Fig 3.Mechanisms of airway
remodeling In asthmatic patients.
Asthma associated
Inflammatory mediators exert
their effects on different cell types
in the lung, leading to fibrosis,
excess mucus production,
angiogenesis, and increased
airway smooth muscle mass. MIP-
1a, Macrophage Inflammatory
Protein 1a
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Asthma: attack
---------------------------------------------------------------------- attack
---------------------------------------------------------------------- MPI
Asthma time
MPI:
minimalpersistent inflammationi
Trigger“heavy”
combination
attack
TriggerSingle mild
symptoms
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SEVERITY OF ASTHMA EXACERBATION
GINA 2006 28
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Criteria for administration of omalizumab• Age > 12 years• Positive result on skin testing or in vivo reactivity to at least one
perennial aeroallergen• Baseline immunoglobulin E levels of 30–700 IU/mL• Weight 20–150 kg• Calculated dose of omalizumab < 750 mg• Severe or inadequately controlled asthma, as defined by
frequent exacerbations or the need for daily or frequent oralcorticosteroids, despite appropriate environmental control,smoking cessation, patient education and consistent therapywith inhaled corticosteroid at a minimum daily dose of 500 μg of fluticasone or equivalent plus adjunctive therapy
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TABLE 3. DISEASES ASSOCIATED WITH ASTHMA• Allergic bronchopulmonary aspergillosi• Hyperventilation/panic disorder• Eosinophilic pneumonia • Carcinoid syndrome• Churg-Strauss syndrome • Thyrotoxicosis• 1-Antitrypsin deficiency • Obstructive sleep apnea• Vocal cord dysfunction • Obesity
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1. Confirm diagnosisa. Ensure careful detailed history has been taken and full
examination performed.b. Spirometry. Perform full inspiratory and expiratory loops if
possible. The expiratory loop may show small-medium airways obstruction, but it may also be normal in children withdifficult asthma who do not yet have fixed airway remodelling. Change in spirometry may occur in some children simply on repeated expiratory forced manoeuvres. Spirometrymay also point to other pathology, eg. large airway pathology.
c. Perform reversibility test: calculate difference between FEV1 pre and post 400 micrograms salbutamol via large volume spacer. An increase of 12% is significant.
d. A peak flow diary may be useful in some children to show trends.
e. Ensure that trials of appropriate therapies have already been tried, e.g. leukotriene receptor antagonist (montelukast), long acting beta agonist (salmeterol or formoterol).
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f. If not already done, switch separate inhalers to a combination device, e.g. Seretide or Symbicort. Consider use of Symbicort as a reliever device if appropriate.
g. Measure exhaled Nitric Oxide (eNO). This can be measured bythe BRI Pulmonary function testing (PFT) lab or by us once we have our own equipment. A raised eNO (>20 ppb) is associated with airway inflammation in asthma, and it usually falls if a child is taking inhaled corticosteroids.
h. Consider arranging induced sputum examination.i. Sometimes arranging an admission for a few days is useful to
observe symptoms, assess compliance in hospital, and record serial spirometry.
j. Establish response to oral steroid therapy Consider the use of long term low dose (preferably alternate day) steroid therapy.
k. Specific written advice about steroid replacement in the eventof a severe intercurrent illness should be part of themanagement plan for children treated with ≥800 microgramsper day of BDP or equivalent
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2. Reasons for treatment failurea. Inappropriate delivery devices: assess technique and modify
device use / choice if necessary.b. Poor adherence: ask for their perception of compliance,
quantify number & type of prescriptions, concentrate oneducation, use adherence chart. Consider a trial ofintramuscular triamcinolone (80mg as a single dose, 40mg in<5 yrs).
c. Environmental factors: identify environmental allergens and quantify allergy using skin prick or RAST testing. Suggestallergen avoidance or removal strategies; provide opportunityand help for smoking cessation (patients and family).
d. Psychosocial problems: attempt to identify factors, if appropriate, consider referral to psychology service.
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3. Consider alternative diagnoses or possible precipitating factors
a. Cystic fibrosisb. Primary ciliary dyskinesiac. Vocal cord dysfunctiond. Obliterative bronchiolitise. Bronchiectasisf. Inhaled foreign bodyg. Vascular ring / tracheobronchomalaciah. Gastro-oesophageal refluxi. Recurrent aspirationj. Immunodeficiencyk. Congenital lung abnormalitiesl. Congenital heart disease
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Consider the following investigationsa. CXRb. CT thorax (e.g. if interstitial lung disease or obliterative
bronchiolitis suspected)c. Total IgE, specific IgE, skin prick testingd. Immune function: IgG, IgA, IgM; (also consider as appropriate:
IgG subclasses, complement concentrations, neutrophilfunction, antibody response (against tetanus, Hib, Pneumococcus))
e. Sweat testf. Barium swallow g. pH studyh. Nasal brushing for ciliary beat frequency / ultra-structurei. Flexible bronchoscopyj. Micro-laryngoscopyk. EchocardiographyC
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TABLE 3ENVIRONMENTAL FACTORS THAT COULDPLAY A ROLE IN REFRACTORY ASTHMA-------------------------------------------------------------------------1. Tobacco smoke
a. In uterob. Environmental
2. Allergen sensitization3. Viral infections4. Occupational agents5. Air pollutants6. Stress
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Difficult Asthma Clinic
Trial Add on Therapies
1
2
3
Optimise Asthma Management Skills
Identify and Manage Aggravating Factors
Confirm Diagnosis
Referred to DACDiagnosis
of Asthma
excluded
and
discharged
Control
Achieved
and
Discharged
Control
Achieved
and
Discharged
Control
Achieved
and
Discharged
or remain
under DAC
Control
NOT
Achieved
and remain
under the
care of DAC
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Other drugs as additionalOther anti inlammation : methotrexate,
gold salt, cyclosporine, anti TNF Anti leukotrine : zafirlukast, montelukastAnti IgE : omalizumabCytokine modulator Bronchothermoplasty
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Table 1: Other treatments for severe asthma
Therapy or therapeutic
agent
Mode of
administration
Dosage Quality evidence,
level
Cost Principal adverse effects
Methotrexate oral 5-25 mg/wk I $ Anemia, diarrhea, nausea,single fibrosis, pulmonary toxicity
opportunistic infection
Cyclosporin A oral 3 mg/kg twice I $$$ Hypertension, renal failure,
with target serum hypertrichosis, parasthesiaconcent 150 mg/L
Auranofin (gold salt) Oral 3 mg twice daily II-2 $$ Urticaria, stomatitis, leukopenia,
thrombocytopenia, proteinuria
Intravenous Intravenous 4 doses (1g/kg BW) I $$$ Aseptic meningitis syndrome,
Immunoglobulin first 2 doses on Thromboembolic events, renal-
consecutive days, impairment, hemolytic anemia
subsequent doses
once every 4 wks
Diaminodiphenyl Oral 100 mg twice daily II-2 $ Methemoglobinemia, hypersensitivity
sulfone (dapsone) reactions, agranulocytosis,
peripheral neuritis, psychosis
Hydroxychloroquine Oral 300–400 mg/d II-2 $ Hypersensitivity, liver and
renal toxicity, blood dyscrasias
Anti-interleukin-5 Intravenous 750 mg, given II-2 NA Local reaction at injection site
monthly
Anti-interleukin 12 Subcutaneous Weekly injections of II-2 NA Local reaction at injection site
increasing dose: 0.1,
0.25, 0.5 μg/kg
Bronchial Invasive Several serial sessions II-2 NA Short term increase in cough and
Thermoplasty bronchoscopic wheeze
procedure
CMAJ • JANUARY 12, 2010 • 182(1)
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