Global Initiative For Asthma Guidelines 2008

Global Initiative for Asthma Management 2009: Please visit: http://crisbertcualteros.page.tl

GLOBAL INITIATIVES FOR ASTHMA (GINA)

Initiated in 1989

US National Heart, Lung and Blood Institute

National Institute of Health

World Health Organization

OBJECTIVES:

To increase appreciation for global public health

perspectives of asthma

Recommend diagnostic and management strategies

Identify areas for future investigations

Objectives:

To present and compare the GINA 2002 with GINA

2006-07 guidelines

To update clinicians with the newer approach to the management in children

GINA ASTHMA GUIDELINES:

2002 2006-07

EMPHASIS: CLASSIFICATION ASTHMA MANAGEMENT OF PATIENT BY BASED ON CLINICAL SEVERITY CONTROL DEFINITION: IMPACT OF THE CLINICAL,PHYSIOLOGICAL DISEASE ON LUNG AND PATHOLOGICAL FUNCTION CHARACTERISTICS - airflow limitation - episodic shortness of - its reversibility breathing - airway hyper- - wheezing responsiveness - cough

2002 2006-07

PATHOLOGY: Acute and Chronic Inflammation Inflammation is persistent Inflammation affects all airways more in the medium sized bronchi

2002 2006 -07

Pathophysiology: Airway Narrowing : - Airway smooth muscle contraction - Airway edema - Airway thickening - Mucus hypersecretion Airway Hyperresponsiveness

GINA ASTHMA GUIDELINES :

2002 2006 - 07

Asthma is a chronic inflammatory disorder of the airways

is associated with airway hyperresponsiveness

recurrent episodes of wheezing

Breathlessness

chest tightness

coughing

2002 2006-07

Factors Influencing the Development and Expression of Asthma HOST FACTORS Genetic, e.g., Genes pre-disposing to atopy Genes pre-disposing to airway hyperresponsiveness Obesity Sex ENVIRONMENTAL FACTORS Allergens Indoor: Domestic mites, furred animals(dogs, cats, mice) cockroach allergen, fungi, molds, yeast Outdoor: Pollens, fungi, molds, yeasts Infections (predominantly viral) Occupational sensitizers Tobacco smoke Passive smoking Active smoking Outdoor/Indoor Air Pollution Diet

GINA ASTHMA GUIDELINES 2002, 2006, 2007 DIAGNOSIS: Reversibility of measurements of lung function enhances confidence in making a diagnosis of asthma Often prompted by symptoms: episodic breathlessness wheezing cough chest tightness Assessment of the severity of airflow limitation Reversibility and variability confirms the Diagnosis of asthma Asthma severity: Amount of daily medications required for optimal treatment Asthma severity is measured NOT by severity of the underlying disease BUT its responsiveness to treatment 2002 2006 - 07 Measurement of allergic state helps to identify Risk factors that causes asthma symptoms in patients

2002 2006-07

Clinical Control of asthma is defined as:

No (twice or less/week) daytime symptoms

No limitations of daily activities, including

exercise

No nocturnal symptoms or awakening because

of asthma

No (twice or less/week) need for reliever

treatment

Normal or near normal lung function

No exacerbations

EMPHASIS: CLASSIFICATION ASTHMA MANAGEMENT OF PATIENT BY BASED ON CLINICAL SEVERITY CONTROL

2002 2006 - 07

WHAT DETERMINES DISEASE CLASSIFICATION IN GINA 2002 ?

Worst feature determines the severity classification

Useful when decisions are being made about management at the initial assessment of a patient

ASTHMA SEVERITY (GINA 2002)

Involves both the severity of the underlying disease and its responsiveness to treatment.

May change over months or years

VALUE OF GINA 2002 GUIDELINES

Cross sectional means of characterizing patients with asthma who are not on inhaled corticosteroids treatment

No maintenance

Newly diagnosed

No previous consult

No longer recommended as basis for ongoing treatment

ASTHMA CONTROL (GINA 2006)

Refers to control of the clinical symptoms of the disease

Treatment is aimed at controlling the clinical features of disease

GINA ASTHMA GUIDELINES: Questions to consider in the Diagnosis of Asthma

Has the patient had an attack or recurrent attacks of wheezing?

Does the patient have a troublesome cough at night?

Does the patient wheeze or cough after exercise?

Does the patient experience wheezing, chest tightness or cough

after exposure to airborne allergens or pollutants?

Do the patient’s colds “go to the chest” or take more than 10 days

to clear up?

Are symptoms improved by appropriate asthma treatment?

GINA ASTHMA GUIDELINES: Diagnosis and Classification 2002 Classification of Asthma Severity by Clinical Features Before Treatment Intermittent: Mild Moderate Severe Persistent: Persistent: Persistent: Symptoms less than once a week Brief exacerbations Nocturnal symptoms NOT more than twice a month FEV 1 or PEF≥80% Predicted PEF or FEV 1 variability 20-30% Symptoms more Than once a week But less than once A day Exacerbations may Affect activity and Sleep Nocturnal symptoms More than twice a Month FEV 1 or PEF≥ 80% Predicted PEF or FEV 1 variability 20-30% Symptoms daily Exacerbations may Affect activity and sleep Nocturnal symptoms more than once a week Daily use of inhaled short acting β 2 -agonist FEV 1 or PEF 60-80% Predicted PEF or FEV 1 variability>30% Symptoms daily Frequent exacerbations Frequent Nocturnal asthma symptoms Limitation of physical activities FEV 1 or PEF ≤60% Predicted PEF or FEV 1 Variability > 30%

Classify Asthma Based on Severity: Severity INTERMITTENT PERSISTENT Mild Moderate Severe Daytime Symptoms < 1x a week  1x/wk Daily Daily Affects daily Limits daily activities activities Nighttime Symptoms  2x/month >2x/month >1x/week Frequent PEF  80%  80% >60-<79% <60% predicted predicted predicted predicted PEF Variability  20% 20-30% >30% >30% variability variability variability variability FEV1  80%  80% 60-79% <60% (GINA 2002)

GINA ASTHMA GUIDELINES: 2006 Levels of Asthma Control Characteristic Controlled(All of the ff) Partly Controlled (Any measure present in any week) Uncontrolled Daytime symptoms None (2x or </wk.) More than 2x/wk Three or more features of partly controlled asthma present in any week Limitations of activities None Any Nocturnal symptoms/ awakening None Any Need for reliever/rescue tx None (2x or less/week) More than 2x/ wk Lung function (PEF or FEV1) + Normal <80% predicted or personal best (if known) Exacerbations None One or more/ yr* One in any wk ╪

Asthma in Acute Exacerbation GINA ASTHMA GUIDELINES: 2002 2006-07

Severity of Asthma Exacerbations….. MILD MODERATE SEVERE RESPIRATORY ARREST IMMINENT Breathless Walking Talking At rest Infants – softer Infants- Stops shorter cry feeding Can lie flat Prefers sitting *Hunched forward Talks in Sentences Phrases Words Alertness May be agitated Usually agitated Usually agitated Respiratory Rate Increased Increased *Often >30/min Bradypnea GUIDE TO RATES OF BREATHING ASSOCIATED WITH RESPIRATORY DISTRESS IN AWAKE CHILDREN AGE NORMAL RATE > 2 months < 60/min 2-12 months < 50/min 1-5 years < 40/min 6-8 years < 30/min GINA 2002, 2006, 2007

MILD MODERATE SEVERE RESPIRATORY ARREST IMMINENT Accessory None Present Present Present Muscles & Thoraco-abdominal Suprasternal Movement Retraction Wheeze Audible with Audible with Audible w/o Absence of wheeze stethoscope stethoscope stethoscope with decreased to absent breathe sounds Pulses/min <100 100-120 >120 Bradycardia GUIDE TO LIMITS OF NORMAL PULSE RATE IN CHILDREN Age Normal Limits Infants 2-12 months <160/min Preschool 1-2 years <120/min School Age 2-6 years <110/min Severity of Asthma Exacerbations….. GINA 2002, 2006, 2007

Severity of Asthma Exacerbations MILD MODERATE SEVERE RESPIRATORY ARREST IMMINENT Pulses Paradoxus Absent May be present Often present Absence suggests <10mm Hg 10—20mm Hg 20-40mm Hg respiratory muscle fatigue PEF  80% 60-79% <60% %predicted Or %personal best PaO2 RA Normal  60mm Hg <60mmHg test NOT usually Possible Cyanosis necessary PaCO2  45 mm Hg  45 mm Hg >45 mm Hg possible respiratory failure SaO2 RA  95% 90-94% <90% Hypercapnea (hypoventilation) develops more rapidly in young children GINA 2002,2006,2007

GINA ASTHMA GUIDELINES: (2002, 2006,2007) Management of Asthma Exacerbation in Acute Care Initial Assessment History, Physical Examination(auscultation, use of accessory muscles, HR, RR, PEF or FEV1, O2 saturation, ABG’s if patient in extremis) Initial Treatment Oxygen to achieve O2 saturation ≥90% (95% in children) Inhaled rapid β 2-agonist continuously for one hour Systemic GCS, if no immediate response, or if patient recently took Oral GCS, of if episode is severe SEDATION is CONTRAINDICATED in the treatment of an exacerbation Reassess after 1 hour : PE, PEF, O2 saturation & other tests as needed

Criteria for MODERATE Episode:

PEF 60-80% predicted/personal best

Physical exam: moderate symptoms,

Accessory muscle use

Treatment:

O2,

Inhaled β 2 agonist + anticholinergic every 60 min

Oral GCS

Continue treatment for 1-3 hours,provided

There is improvement

Criteria for SEVERE Episode:

History of risk factors for near fatal asthma

PEF < 60% predicted/personal best

PE: severe symptoms at rest, chest retraction

NO improvement after initial treatment

Treatment:

O2,

Inhaled β 2 agonist + anticholinergic

Systemic GCS

IV Magnesium

Continuation next slide S1

GINA ASTHMA GUIDELINES: (2002, 2006,2007) Reassess after 1 – 2 hours Good Response within 1-2 hours: Response sustained 60 minutes after last treatment PE normal: no distress PEF > 70% O2 saturation > 90% (95% in children) Incomplete Response within 1-2 hours: Risk Factors for near fatal asthma PE : mild to moderate signs PEF < 60% O2 saturation: NOT IMPROVING Poor Response within 1-2 hours: Risk factors fro near fatal asthma PE : symptoms severe, drowsiness, confusion PEF : < 30% PCO2 : > 45mmHg PO2: < 60mmHg

ADMIT to ACUTE CARE Setting

Oxygen

Inhaled β 2-agonist ± anticholinergic

Systemic GCS

Intravenous Magnesium

Monitor PEF, O2 saturation, Pulse

ADMIT to INTENSIVE Care

Oxygen

Inhaled β 2-agonist+anticholinergic

IV GCS

Consider IV β 2 agonist

Consider IV theophylline

Possible intubation

mechanical ventilation

Reassess at Intervals

Poor Response:

Admit to intensive Care

Incomplete response in 6-12 hours

Consider admission to Intensive Care

If No improvement within hours

Improved

Improved: Criteria for Discharging Home

PEF > 60% predicted / personal best

Sustained on oral/inhaled medications

HOME TREATMENT:

Continue inhaled β 2 agonist

Consider in most cases, oral GCS

Consider adding a combination inhaler

Patient education: take medicine correctly

review action plan

close medical check up

Management of Asthma Exacerbation in Acute Care Cont. (S2)

Inhaled β 2 -agonists are the mainstay of therapy in acute asthma.

However, once response to the initial β 2 -agonists is minimal, incomplete or poor …

COMBINATION of INHALED β 2 -AGONIST and INHALED ANTICHOLINERGIC is RECOMMENDED

What is the role of Salbutamol – Ipratropium

in acute asthmatic attacks?

INTERMITTENT

- no added benefit over Salbutamol alone if attack is mild

However, any moderate to severe attack of asthma regardless of severity classification can benefit from the combination.

Medicines in Childhood Asthma

Relievers

Rapid-acting inhaled Beta (B)2 agonist

Inhaled anti-cholinergics

Short acting theophylline

Short acting B2 agonist

(SABA)

Controllers

Inhaled and systemic corticosteroids

Leukotriene modifiers

Long-acting B2 agonist (LABA) with Inhaled Corticosteroid ICS

Sustained release theophyllines

Cromones

GINA ASTHMA GUIDELINES 2002, 2006, 2007

GINA ASTHMA GUIDELINES: Recommended Medications by Level of Severity: Children 2002 Daily Controller Medications Other Treatment Options INTERMITTENT PERSISTENT MILD MODERATE SEVERE

None

necessary

IGCS

100-400mcg

BUD

IGCS 400-800µg BUD

IGCS < 800µg BUD

PLUS

Sustained released

theophylline OR

IGCS <800µg BUD

PLUS LABA

OR

IGCS > 800µg OR

IGCS <800mcg PLUS

Leukotriene modifier

IGCS >800µg BUD

PLUS one or more

of the following:

Sustained-

release theophylline

Long Acting Inhaled

β -2 agonist

Leukotriene modifier

Oral glucocortico

steroid

Sustained-

release

Theophylline ,

OR

Cromone,

OR

Leukotriene

modifier

All Steps: In addition to daily controller therapy, rapid-acting inhaled β 2 agonist* should be taken as needed to relieve symptoms, but should not be taken more than 3 to 4 times a day. In all steps: Once control of asthma is achieved and maintained for at least 3months, a gradual reduction of the maintenance therapy should be tried in order to identify the minimum therapy required to maintain control

GINA 2006, 2007 maintain and find lowest controlling step consider stepping up to gain control step up until controlled treat as exacerbation TREATMENT OF ACTION controlled partly controlled uncontrolled exacerbation LEVEL OF CONTROL INCREASE REDUCE

GINA 2006, 2007 CONTROLLER OPTIONS * Inhaled glucocorticosteroid ** receptor antagonist or synthesis inhibitors asthma education environmental control as needed rapid acting β 2- agonist as needed rapid acting β 2- agonist SELECT ONE SELECT ONE ADD ONE OR MORE ADD ONE OR BOTH low-dose ICS* low-dose ICS plus LABA Medium- or high-dose ICS plus LABA Oral gluco-corticosteroid leukotriene modifier** Medium- or high-dose ICS leukotriene modifier Anti-IgE treatment low-dose ICS plus leukotriene modifier sustained- release theophylline low-dose ICS plus leukotriene modifier

Inhaled Corticosteroids: Cornerstone in the Management Of Asthma GINA ASTHMA GUIDELINES 2002, 2006-07

Inhaled Corticosteroids

Most effective long-term control for persistent asthma

Small risk for adverse events at recommended dosage

Benefits of daily use

Reduction of

asthma symptoms

frequency of exacerbations

airway inflammation

airway responsiveness

asthma mortality

Improvement of

lung function

quality of life

Inhaled Corticosteroids Adverse Events

Small risk for adverse events at recommended doses

Reduce potential for adverse events by:

Using spacer

Rinsing mouth

Maintenance Therapy: GINA ASTHMA GUIDELINES 2002,2006,2007 Stepping Down

When asthma is controlled with:

IGCS alone in medium to high dose a 50% reduction in dose

should be attempted at 3 months interval (Evidence B)

IGCS in low dose of alone treatment may be switched to once-

daily dosing (Evidence A)

Combination of IGCS and LABA, reduce dose of IGCS by 50%

while continuing LABA (Evidence B) If control is maintained,

further reduce IGCS until low dose is reached, when LABA may be

stopped . (Evidence D) OR switch the combination treatment to

once daily dosing OR discontinue the LABA at an earlier stage

and substitute the combination with IGCS monotherapy. In some

patients these alternative approaches lead to loss of asthma

control (Evidence B)

IGCS and controllers other the LABA , reduce dose of IGCS by 50% until low dose of IGCS is reached, then may stop combination treatment (Evidence D)

Controller treatment may be stopped if the patient’s asthma remains controlled on the lowest dose of controller and no recurrence of symptoms for ONE YEAR (Evidence D)

Stepping Down cont. Maintenance Therapy: GINA ASTHMA GUIDELINES 2002,2006,2007

Maintenance Therapy: GINA ASTHMA GUIDELINES 2002,2006,2007 Stepping Up

When asthma is NOT controlled with:

Rapid onset, short acting or long acting β 2 agonist

bronchodilators .

Repeated dosing with bronchodilators in this class provides

temporary relief until the cause of the days signals the need for

review and possible increase of controller therapy.

Inhaled glucocorticosteroids . Temporarily doubling the dose of

IGCS has not been demonstrated to effective and is no longer

recommended (Evidence A). A fourfold or greater increase has

been demonstrated to be equivalent to a short course of Oral GCS

(Evidence A)

Maintenance Therapy: GINA ASTHMA GUIDELINES 2002,2006,2007 Stepping Up

Combination of Inhaled Glucocorticosteroids and rapid

and LABA (formoterol) for combined relief and control.

The use of the combination of a rapid and long acting β 2-

agonist(formoterol) and an inhaled glucocorticosteroid

(budesonide) in a single inhaler both as a controller and a r

reliever is effective in maintaining a high level of asthma control

and reduces exacerbation requiring systemic GCS and

hospitalization (Evidence A)

Maintenance Therapy: GINA ASTHMA GUIDELINES 2002, 2006, 2007 2002 2006 2007 IGCS + LABA Not mentioned As form of therapy Not recommended For children ≤ 5 years As maintenance and rescue Medication has shown to reduce exacerbations in children ≥ 4 years with moderate & severe asthma

Estimated Equipotent Daily Doses of Inhaled Corticosteroids for Children Drug Low Daily Dose Medium Daily Dose High Daily Dose (µg) (µg) (µg) Beclomethasone 100 – 200 >200 – 400 >400 Dipropionate Budesonide 100-200 >200- 400 >400 Ciclesonide 80-160 >160-320 >320 Flunisolide 500-750 > 750-1250 > 1250 Fluticasone 100-200 > 200 – 500 >500 Mometasone 100-200 >200 – 500 >400 furoate Triamcinolone 400-800 >800 – 1200 > 1200 acetonide GINA ASTHMA GUIDELINES 2002,2006-07

Choosing an Inhaler Device for Children with Asthma Age Group Preferred device Alternate Device Younger than 4 years Pressurized metered Nebulizer with face dose inhaler plus mask dedicated spacer with face mask 4 – 6 years Pressurized metered Nebulizer with dose inhaler plus mouth piece dedicated spacer with mouth piece Older than 6 years Dry powder inhaler, Nebulizer with mouth or breath-actuated piece pressurized metered- dose inhaler or pressurized metered dose inhaler with spacer mouth piece

Leukotriene Pathway