The grades of recommendations (A-D), levels of evidence (1++, 1+, 1-, 2++, 2+, 2-, 3, 4), and good practice points (GPPs) are defined at the end of the "Major Recommendations" field.
Diagnosis
Diagnosis in Children
Making a Diagnosis in Children
B - Focus the initial assessment in children suspected of having asthma on:
- Presence of key features in the history and examination
- Careful consideration of alternative diagnoses
GPP - Record the basis on which a diagnosis of asthma is suspected.
High Probability of Asthma
GPP - In children with a high probability of asthma:
- Start a trial of treatment
- Review and assess response
- Reserve further testing for those with a poor response
Low Probability of Asthma
GPP - In children with a low probability of asthma, consider more detailed investigation and specialist referral.
Children with an Intermediate Probability of Asthma and Evidence Airway Obstruction
GPP - In children with an intermediate probability of asthma who can perform spirometry and have evidence of airways obstruction, assess the change in forced expiratory volume in one second ( FEV1) or peak expiratory flow (PEF) in response to an inhaled bronchodilator (reversibility) and/or the response to a trial of treatment for a specified period:
- If there is significant reversibility, or if a treatment trial is beneficial, a diagnosis of asthma is probable. Continue to treat as asthma, but aim to find the minimum effective dose of therapy. At a later point, consider a trial of reduction or withdrawal of treatment.
- If there is no significant reversibility, and a treatment trial is not beneficial, consider tests for alternative conditions (see Table 3 in the original guideline document).
Children with an Intermediate Probability of Asthma Without Evidence of Airway Obstruction
C - In children with an intermediate probability of asthma who can perform spirometry and have no evidence of airways obstruction:
- Consider testing for atopic status, bronchodilator reversibility and, if possible, bronchial hyper-responsiveness using methacholine, exercise or mannitol.
- Consider specialist referral.
Children with an Intermediate Probability of Asthma Who Cannot Perform Spirometry
GPP - In children with an intermediate probability of asthma who cannot perform spirometry, offer a trial of treatment for a specified period:
- If treatment is beneficial, treat as asthma and arrange a review
- If treatment is not beneficial, stop asthma treatment and consider tests for alternative conditions and specialist referral.
Other Investigations
Chest X-Ray
GPP - Reserve chest X-rays for children with severe disease or clinical clues suggesting other conditions.
Diagnosis in Adults
GPP - Base initial diagnosis on a careful assessment of symptoms and a measure of airflow obstruction:
- In patients with a high probability of asthma move straight to a trial of treatment. Reserve further testing for those whose response to a trial of treatment is poor.
- In patients with a low probability of asthma, whose symptoms are thought to be due to an alternative diagnosis, investigate and manage accordingly. Reconsider the diagnosis of asthma in those who do not respond.
- The preferred approach in patients with an intermediate probability of having asthma is to carry out further investigations, including an explicit trial of treatments for a specified period, before confirming a diagnosis and establishing maintenance treatment.
D - Spirometry is the preferred initial test to assess the presence and severity of airflow obstruction.
Further Investigation of Patients with an Intermediate Probability of Asthma
Patients With Airways Obstruction
GPP - Offer patients with airways obstruction and intermediate probability of asthma a reversibility test and/or a trial of treatment for a specified period:
- If there is significant reversibility, or if a treatment trial is clearly beneficial, treat as asthma
- If there is insignificant reversibility and a treatment trial is not beneficial, consider tests for alternative conditions. (see section 2.5 in the original guideline document for more detailed information on further tests)
Patients Without Airways Obstruction
GPP - In patients without evidence of airways obstruction and with an intermediate probability of asthma, arrange further investigations (see section 2.5 in the original guideline document for more detailed information on further tests) before commencing treatment.
GPP - Consider performing chest X-ray in any patient presenting atypically or with additional symptoms or signs. Additional investigations such as full lung function tests, blood eosinophil count, serum immunoglobulin E (IgE) and allergen skin prick tests may be of value in selected patients.
Further Investigation of Patients with an Intermediate Probability of Asthma
Treatment Trials and Reversibility Testing
C - Assess FEV1 (or PEF) and/or symptoms:
- Before and after 400 micrograms inhaled salbutamol in patients with diagnostic uncertainty and airflow obstruction present at the time of assessment
- In other patients, or if there is an incomplete response to inhaled salbutamol, after either inhaled corticosteroids (200 micrograms twice daily beclometasone equivalent for 6-8 weeks) or oral prednisolone (30 mg once daily for 14 days).
Peak Expiratory Flow Monitoring
GPP - Peak flow records should be interpreted with caution and with regard to the clinical context. They are more useful in the monitoring of patients with established asthma than in making the initial diagnosis.
Tests of Eosinophilic Airway Inflammation
C - In patients in whom there is diagnostic uncertainty and no evidence of airflow obstruction on initial assessment, test airway responsiveness wherever possible.
Non-Pharmacologic Management
Primary Prophylaxis
Food Allergen Avoidance
B - In the absence of any evidence of benefit and given the potential for adverse effects, maternal food allergen avoidance during pregnancy and lactation is not recommended as a strategy for preventing childhood asthma.
Breast Feeding
C - Breast feeding should be encouraged for its many benefits, and as it may also have a potential protective effect in relation to early asthma.
Avoidance of Tobacco Smoke and Other Air Pollutants
B - Parents and parents-to-be should be advised of the many adverse effects which smoking has on their children including increased wheezing in infancy and increased risk of persistent asthma.
Immunisation
C - All childhood immunisations should proceed normally as there is no evidence of an adverse effect on the incidence of asthma.
Secondary Non-pharmacologic Prophylaxis
GPP - Families with evidence of house dust mite allergy and who wish to try mite avoidance might consider the following:
- Complete barrier bed-covering systems
- Removal of carpets
- Removal of soft toys from bed
- High temperature washing of bed linen
- Acaricides to soft furnishings
- Good ventilation with or without dehumidification
Other Environmental Factors
Smoking
C - Parents with asthma should be advised about the dangers of smoking to themselves and their children with asthma and offered appropriate support to stop smoking.
Immunotherapy
Subcutaneous Immunotherapy
B - Immunotherapy can be considered in patients with asthma where a clinically significant allergen cannot be avoided. The potential for severe allergic reactions to the therapy must be fully discussed with patients.
Sublingual Immunotherapy
B - Sublingual immunotherapy cannot currently be recommended for the treatment of asthma in routine practice.
Dietary Manipulation
Weight Reduction in Obese Patients with Asthma
C - Weight reduction is recommended in obese patients with asthma to promote general health and to improve asthma control.
Immunisations
B - Immunisations should be administered independent of any considerations related to asthma. Responses to vaccines may be attenuated by high-dose inhaled steroids.
Air Ionisers
A - Air ionisers are not recommended for the treatment of asthma.
Breathing Exercises including Yoga and the Bureyko Breathing Technique
B - Buteyko breathing technique may be considered to help patients to control the symptoms of asthma.
Family Therapy
GPP - In difficult childhood asthma, there may be a role for family therapy as an adjunct to pharmacotherapy.
Pharmacological Management
GPP - Lung function measurements cannot be reliably used to guide asthma management in children under 5 years of age
GPP - Before initiating a new drug therapy practitioners should check compliance with existing therapies (see section 9.2 in the original guideline document), inhaler technique (see section 5 in the original guideline document) and eliminate trigger factors (see section 3 in the original guideline document).
In this and the following section ("Inhaler Devices"), each recommendation has been graded for adults (> 12 years old), children 5 to 12 years, and children under 5 years. See Figures 4, 5, and 6 in the original guideline document for a summary of stepwise management in each of the age segments. The evidence is less clear in children under two and the threshold for seeking an expert opinion should be lowest in these children.
Step 1: Mild Intermittent Asthma
Adults: A; Children aged 5 to 12 years: B; Children under 5 years: C - Prescribe an inhaled short acting beta2 agonist as short term reliever therapy for all patients with symptomatic asthma.
Adults: B; Children aged 5 to 12 years: D; Children under 5 years: D - Patients with high usage of inhaled short acting beta2 agonists should have their asthma management reviewed.
Step 2: Introduction of Regular Preventer Therapy
Adults: A; Children aged 5 to 12 years: A; Children under 5 years: A - Inhaled steroids are the recommended preventer drug for adults and children for achieving overall treatment goals.
Inhaled Steroids
Inhaled steroids should be considered for patients with any of the following asthma related features
- Adults: B; Children aged 5 to 12 years: C; Children under 5 years: Recommendation does not apply to this age group; exacerbations of asthma in the last two years
- Adults: B; Children aged 5 to 12 years: C; Children under 5 years: GPP - using inhaled beta2 agonists three times a week or more
- Adults: B; Children aged 5 to 12 years: C; Children under 5 years: GPP- symptomatic three times a week or more
- Adults: B; Children aged 5 to 12 years: C; Children under 5 years: GPP - waking one night a week
Starting Dose of Inhaled Steroids
- GPP - Start patients at a dose of inhaled steroids appropriate to the severity of disease.
- GPP - In adults, a reasonable starting dose will usually be 400 micrograms per day and in children 200 micrograms per day. In children under five years, higher doses may be required if there are problems in obtaining consistent drug delivery.
- GPP - Titrate the dose of inhaled steroid to the lowest dose at which effective control of asthma is maintained.
Frequency of Dosing of Inhaled Steroids
- Adults: A; Children aged 5 to 12 years: D; Children under 5 years: D - Give inhaled steroids initially twice daily, except ciclesonide which is given once daily.
- Adults: A; Children aged 5 to 12 years: D; Children under 5 years: D - Once a day inhaled steroids at the same total daily dose can be considered if good control is established.
Safety of Inhaled Steroids
Adults
- GPP - Titrate the dose of inhaled steroid to the lowest dose at which effective control of asthma is maintained.
Children
- GPP - Monitor height of children on high doses of inhaled steroids on a regular basis.
- GPP - The lowest dose of inhaled steroids compatible with maintaining disease control should be used.
For children treated with ≥800 micrograms per day of beclomethasone dipropionate (BDP) or equivalent:
- GPP - Specific written advice about steroid replacement in the event of a severe intercurrent illness should be part of the management plan.
- GPP - The child should be under the care of a specialist paediatrician for duration of the treatment.
Smoking
- Adults: B; Children aged 5 to 12 years: Recommendation does not apply to this age group; Children under 5 years: Recommendation does not apply to this age group Clinicians should be aware that higher doses of inhaled steroids may be needed in patients who are smokers/ex-smokers.
Step 3: Initial Add-on Therapy
- Adults: A; Children aged 5 to 12 years: B; Children under 5 years: Recommendation does not apply to this age group. - The first choice as add-on therapy to inhaled steroids in adults and children (5-12 years) is an inhaled long-acting beta2 agonist, which should be considered before going above a dose of 400 micrograms (BDP) or equivalent per day and certainly before going above 800 micrograms BDP.
- Adults: D; Children aged 5 to 12 years: D; Children under 5 years: Recommendation does not apply to this age group. - If asthma control remains sub-optimal after the addition of an inhaled long acting beta2 agonist, then the dose of inhaled steroids should be increased to 800 micrograms/day in adults or 400 micrograms/day in children (5 to 12 years, if not already on these doses.
- GPP - If control remains inadequate after stopping a long-acting inhaled beta2 agonist (LABA) and increasing the dose of inhaled steroid, consider sequential trials of add-on therapy (i.e., leukotriene receptor antagonists, theophyllines, slow-release beta2 agonist tablets [this in adults only]).
- GPP - Long-acting inhaled beta2 agonists should only be started in patients who are already on inhaled corticosteroids.
Step 4: Poor Control on Moderate Dose of Inhaled Steroid + Add-on Therapy: Addition of Fourth Drug
- Adults: D; Children aged 5 to 12 years: D; Children under 5 years: Recommendation does not apply to this age group. - If control remains inadequate on 800 micrograms daily (adults) and 400 micrograms daily (children) of an inhaled steroid plus a long acting beta2 agonist, consider the following interventions:
- Increasing inhaled steroids to 2,000 micrograms/day (adults) or 800 micrograms/day (children 5-12 years)*
- Leukotriene receptor antagonists
- Theophyllines
- Slow release beta2 agonist tablets, though caution needs to be used in patients on long acting beta2 agonists.
* At high doses of inhaled steroid via metered-dose inhaler (MDI), a spacer should be used.
- GPP - If a trial of an add-on treatment is ineffective, stop the drug (or in the case of increased dose of inhaled steroid, reduce to the original dose).
- GPP - Before proceeding to step 5, consider referring patients with inadequately controlled asthma, especially children, to specialist care.
Step 5: Continuous or Frequent Use of Oral Steroids
- GPP - For the small number of patients not controlled at step 4, use daily steroid tablets in the lowest dose providing adequate control.
Steroid Tablet-Sparing Medication
- Adults: A; Children aged 5 to 12 years: D; Children under 5 years: Recommendation does not apply to this age group. - In adults the recommended method of eliminating or reducing the dose of steroid tablets is inhaled steroids, at doses of up to 2,000 micrograms/day if required. In children aged 5 to 12, consider very carefully before going above a dose of 800 micrograms/day.
- Adults: D; Children aged 5 to 12 years: D; Children under 5 years: D - There is a role for a trial of treatment with long acting beta2 agonists, leukotriene receptor antagonists, and theophyllines for about six weeks. They should be stopped if no improvement in steroid dose, symptoms, or lung function is detected.
- GPP - Immunosuppressants (methotrexate, ciclosporin and oral gold) may be given as a three month trial, once other drug treatments have proved unsuccessful. Their risks and benefits should be discussed with the patient and their treatment effects carefully monitored. Treatment should be in a centre with experience of using these medicines.
Stepping Down
- GPP - Regular review of patients as treatment is stepped down is important. When deciding which drug to step down first and at what rate, the severity of asthma, the side-effects of the treatment, time on current dose, the beneficial effect achieved, and the patient's preference should all be taken into account.
- GPP - Patients should be maintained at the lowest possible dose of inhaled steroid. Reduction in inhaled steroid dose should be slow as patients deteriorate at different rates. Reductions should be considered every three months, decreasing the dose by approximately 25 to 50% each time.
Specific Management Issues
Exercise Induced Asthma
- GPP - For most patients, exercise-induced asthma is an expression of poorly controlled asthma and regular treatment including inhaled steroids should be reviewed.
If exercise is a specific problem in patients taking inhaled steroids who are otherwise well controlled, consider the following therapies:
- Adults: A; Children aged 5 to 12 years: C; Children under 5 years: Recommendation does not apply to this age group. - Leukotriene receptor antagonists
- Adults: A; Children aged 5 to 12 years: A; Children under 5 years: Recommendation does not apply to this age group. - Long acting beta2 agonists
- Adults: C; Children aged 5 to 12 years: C; Children under 5 years: Recommendation does not apply to this age group. - Chromones
- Adults: A; Children aged 5 to 12 years: A; Children under 5 years: Recommendation does not apply to this age group. - Oral beta2 agonists
- Adults: C; Children aged 5 to 12 years: C; Children under 5 years: Recommendation does not apply to this age group. - Theophyllines
- Adults: A; Children aged 5 to 12 years: A; Children under 5 years: Recommendation does not apply to this age group - Immediately prior to exercise, inhaled short acting beta2 agonists are the drug of choice
Allergic Bronchopulmonary Aspergillosis
- Adults: C; Children aged 5 to 12 years: Recommendation does not apply to this age group; Children under 5 years: Recommendation does not apply to this age group. - In adult patients with allergic bronchopulmonary aspergillosis (ABPA), a four month trial of itraconazole should be considered.
- GPP - Careful monitoring for side-effects, particularly hepatic is recommended.
Anti IgE Monoclonal Antibody
- GPP - Omalizumab treatment should only be initiated in specialist centres with experience of evaluation and management of patients with severe and difficult asthma.
Inhaler Devices
Technique and Training
- Adults: B; Children aged 5 to 12 years: Good practice point; Children under 5 years: Good practice point. - Prescribe inhalers only after patients have received training in the use of the device and have demonstrated satisfactory technique.
Beta2 Agonist Delivery
Acute Asthma
- Adults: A; Children aged 5 to 12 years: A; Children under 5 years: B. - Children and adults with mild and moderate exacerbations of asthma should be treated by pressurized metered dose inhaler (pMDI) + spacer with doses titrated according to clinical response.
Stable Asthma
- Adults: Recommendation does not apply to this age group; Children aged 5 to 12 years: A; Children under 5 years: Recommendation does not apply to this age group. - In children aged 5 to 12, pMDI + spacer is as effective as any other hand held inhaler.
- Adults: A; Children aged 5 to 12 years: Recommendation does not apply to this age group; Children under 5 years: Recommendation does not apply to this age group. - In adults, pMDI + spacer is as effective as any other hand held inhaler, but patients may prefer some types of dry powder inhaler (DPI).
- GPP - Choice of reliever inhaler for stable asthma should be based on patient preference and assessment of correct use. Many patients will not be prepared to carry a spacer.
Inhaled Steroids for Stable Asthma
- Adults: Recommendation does not apply to this age group; Children aged 5 to 12 years: A; Children under 5 years: Recommendation does not apply to this age group. - In children aged 5 to 12 years, pMDI + spacer is as effective as any DPI.
- Adults: A; Children aged 5 to 12 years: Recommendation does not apply to this age group; Children under 5 years: Recommendation does not apply to this age group. - In adults, a pMDI + spacer is as effective as any DPI.
Chlorofluorocarbon (CFC) Propellant pMDI versus Hydrofluoroalkane (HFA) Propellant pMDI
- Adults: A; Children aged 5 to 12 years: Recommendation does not apply to this age group; Children under 5 years: Recommendation does not apply to this age group. - Salbutamol HFA can be substituted for salbutamol CFC at 1:1 dosing.
- Adults: A; Children aged 5 to 12 years: Recommendation does not apply to this age group; Children under 5 years: Recommendation does not apply to this age group. - HFA beclomethasone dipropionate (BDP) pMDI (Qvar) may be substituted for CFC BDP pMDI at 1:2 dosing. This ratio does not apply to reformulated HFA BDP pMDIs.
- Adults: A; Children aged 5 to 12 years: Recommendation does not apply to this age group; Children under 5 years: Recommendation does not apply to this age group. - Fluticasone HFA can be substituted for fluticasone CFC at 1:1 dosing.
Prescribing Devices
- GPP - The choice of device may be determined by the choice of drug.
- GPP - If the patient is unable to use a device satisfactorily an alternative should be found.
- GPP - The patient should have their ability to use an inhaler device assessed by a competent health care professional (see section 5.1 in the original guideline document).
- GPP - The medication needs to be titrated against clinical response to ensure optimum efficacy.
- GPP - Reassess inhaler technique as part of structured clinical review
- GPP - In children aged 0 to 5 years, pMDI and spacer are the preferred method of delivery of beta2 agonists or inhaled steroids. A face mask is required until the child can breathe reproducibly using the spacer mouthpiece. Where this is ineffective a nebuliser may be required.
Use and Care of Spacers
- GPP - The spacer should be compatible with the pMDI being used.
- GPP - The drug should be administered by repeated single actuations of the metered dose inhaler into the spacer, each followed by inhalation.
- GPP - There should be minimal delay between pMDI actuation and inhalation.
- GPP - Tidal breathing is as effective as single breaths.
- GPP - Spacers should be cleaned monthly rather than weekly as per manufacturer's recommendations or performance is adversely affected. They should be washed in detergent and allowed to dry in air. The mouthpiece should be wiped clean of detergent before use.
- GPP - Drug delivery may vary significantly due to static charge. Metal and other antistatic spacers are not affected in this way
- GPP - Plastic spacers should be replaced at least every 12 months but some may need changing at six months
Management of Acute Asthma
Lessons from Studies of Asthma Deaths and Near Fatal Asthma
- B - Health care professionals must be aware that patients with severe asthma and one or more adverse psychosocial factors are at risk of death.
- GPP - Keep patients who have had near fatal asthma or brittle asthma under specialist supervision indefinitely.
- GPP- A respiratory specialist should follow up patients admitted with severe asthma for at least one year after the admission
Acute Asthma in Adults
Criteria for Referral
- D - Refer to hospital any patients with features of acute severe or life threatening asthma.
Criteria for Admission
- B - Admit patients with any feature of a life threatening or near fatal attack. ("Accuracy of death certificates," 1984; Bucknall et al., 1999; Burr et al., 1999; Mohan et al., 1996; Wareham et al., 1993; Campbell et al., 1997; Innes et al., 1998)
- B - Admit patients with any feature of a severe attack persisting after initial treatment. ("Accuracy of death certificates," 1984; Bucknall et al., 1999; Burr et al., 1999; Mohan et al., 1996; Wareham et al., 1993; Campbell et al., 1997; Innes et al., 1998)
- C - Patients whose peak flow is greater than 75% best or predicted one hour after initial treatment may be discharged from Emergency Department (ED) unless they meet any of the following criteria, when admission may be appropriate:
- Still have significant symptoms
- Concerns about compliance
- Living alone/socially isolated
- Psychological problems
- Physical disability or learning difficulties
- Previous near fatal or brittle asthma
- Exacerbation despite adequate dose steroid tablets pre-presentation
- Presentation at night
- Pregnancy
Treatment of Acute Asthma in Adults
Oxygen
- C - Give high flow oxygen to all patients with acute severe asthma.
- A - In hospital, ambulance and primary care, nebulised beta2 agonist bronchodilators should be driven by oxygen.
- A - Outside hospital, high dose beta2 agonist bronchodilators may be delivered via large volume spacers or nebulisers.
- C - The absence of supplemental oxygen should not prevent nebulised therapy being given if indicated.
Beta2 Agonist Bronchodilators
- A - Use high dose inhaled beta2 agonists as first line agents in acute asthma and administer as early as possible. Reserve intravenous beta2 agonists for those patients in whom inhaled therapy cannot be used reliably.
- GPP - In acute asthma with life threatening features the nebulised route (oxygen-driven) is recommended.
- A - In severe asthma (PEF or FEV1 <50% best or predicted) and asthma that is poorly responsive to an initial bolus dose of beta2 agonist, consider continuous nebulisation.
Steroid Therapy
- A - Give steroid tablets in adequate doses in all cases of acute asthma.
- GPP - Continue prednisolone 40 to 50 mg daily for at least five days or until recovery
Ipratropium Bromide
- B - Add nebulised ipratropium bromide (0.5 mg 4 to 6 hourly) to beta2 agonist treatment for patients with acute severe or life threatening asthma or those with a poor initial response to beta2 agonist therapy.
Intravenous Magnesium Sulphate
- B - Consider giving a single dose of intravenous (IV) magnesium sulphate for patients with:
- Acute severe asthma who have not had a good initial response to inhaled bronchodilator therapy
- Life threatening or near fatal asthma
- GPP - IV magnesium sulphate (1.2 to 2 g IV infusion over 20 minutes) should only be used following consultation with senior medical staff.
Intravenous Aminophylline
- GPP - Use IV aminophylline only after consultation with senior medical staff.
- B - Routine prescription of antibiotics is not indicated for acute asthma.
- C - All patients transferred to intensive care units should be accompanied by a doctor suitably equipped and skilled to intubate if necessary.
Further Investigation and Monitoring
- GPP - Measure and record PEF 15 to 30 minutes after starting treatment, and thereafter according to the response. Measure and record PEF before and after nebulised or inhaled beta2 agonist bronchodilator (at least four times daily) throughout the hospital stay and until controlled after discharge.
- GPP - Record oxygen saturation by oximetry and maintain arterial SaO2 >92%
- GPP - Repeat measurements of blood gas tensions within two hours of starting treatment if:
- The initial partial pressure of oxygen in arterial blood (PaO2) is <8 kPa unless blood oxygen saturation (SaO2) is >92%; or
- The initial partial pressure of carbon dioxide in arterial blood (PaCO2) is normal or raised; or
- The patient's condition deteriorates
- GPP - Measure them again if the patient's condition has not improved by 4 to 6 hours.
- GPP - Measure and record the heart rate.
- GPP - Measure serum potassium and blood glucose concentrations.
- GPP - Measure the serum theophylline concentration if aminophylline is continued for more than 24 hours (aim at a concentration of 55 to 110 micromol/l)
Follow Up
- GPP - It is essential that the patient's primary care practice is informed within 24 hours of discharge from the emergency department or hospital following an asthma exacerbation. Ideally this communication should be directly with a named individual responsible for asthma care within the practice, by means of fax or e-mail.
Acute Asthma in Children Aged Over 2 Years
Initial Assessment
- B - Consider intensive inpatient treatment for children with blood oxygen saturation (SpO2) <92% on air after initial bronchodilator treatment.
- GPP - Decisions about admission should be made by trained physicians after repeated assessment of the response to further bronchodilator treatment.
- GPP - Attempt to measure PEF or FEV1 in all children aged >5 years, taking the best of three measurements, ideally expressed as percentage of personal best for PEF (as detailed in a written action plan) or alternatively as percentage of predicted for PEF or FEV1.
Treatment of Acute Asthma in Children Aged Over 2 Years
- D - The use of structured care protocols detailing bronchodilator usage, clinical assessment, and specific criteria for safe discharge is recommended.
Oxygen
- GPP - Children with life threatening asthma or SpO2 <92% should receive high flow oxygen via a tight fitting face mask or nasal cannula at sufficient flow rates to achieve normal saturations.
Beta2 Agonist Bronchodilators
- A - Inhaled beta2 agonists are the first line treatment for acute asthma. (Schuh et al., 1989; Schuh et al., 1990; Robertson et al., 1985; Schuh et al., 1999)
- A - pMDI + spacer are the preferred option in mild to moderate asthma.
- B - Individualise drug dosing according to severity and adjust according to the patient's response.
- GPP - Children with acute asthma in primary care who have not improved after receiving up to 10 puffs of beta2 agonist should be referred to hospital. Further doses of bronchodilator should be given as necessary whilst awaiting transfer.
- GPP - Treat children transported to hospital by ambulance with oxygen and nebulised beta2 agonists during the journey.
- GPP - Transfer children with severe or life threatening asthma urgently to hospital to receive frequent doses of nebulised beta2 agonists (2.5 to 5 mg salbutamol or 5 to 10 mg terbutaline).
IV Salbutamol
- B - The early addition of a bolus dose of intravenous salbutamol (15 micrograms/kg) can be an effective adjunct to treatment in severe cases.
Steroid Therapy
Steroid Tablets
- A - Give prednisolone early in the treatment of acute asthma attacks.
- GPP - Use a dose of 20 mg prednisolone for children aged 2 to 5 years and a dose of 30 to 40 mg for children >5 years. Those already receiving maintenance steroid tablets should receive 2 mg/kg prednisolone up to a maximum dose of 60 mg.
- GPP - Repeat the dose of prednisolone in children who vomit and consider intravenous steroids in those who are unable to retain orally ingested medication.
- GPP - Treatment for up to three days is usually sufficient, but the length of course should be tailored to the number of days necessary to bring about recovery.
Inhaled Steroids
- GPP - Do not initiate inhaled steroids in preference to steroid tablets to treat acute childhood asthma.
Ipratropium Bromide
- A - If symptoms are refractory to initial beta2 agonist treatment, add ipratropium bromide (250 micrograms/dose mixed with the nebulised beta2 agonist solution).
- GPP - Repeated doses of ipratropium bromide should be given early to treat children poorly responsive to beta2 agonists.
IV Aminophylline
- A - Aminophylline is not recommended in children with mild to moderate acute asthma.
- C - Consider aminophylline in a high dependency unit (HDU) or pediatric intensive care unit (PICU) setting for children with severe or life threatening bronchospasm unresponsive to maximal doses of bronchodilators and steroid tablets.
Other Therapies
- GPP - Do not give antibiotics routinely in the management of acute childhood asthma
Intravenous Fluids
- GPP - Electrocardiograph (ECG) monitoring is mandatory for all intravenous treatments.
Treatment of Acute Asthma in Children Aged Less Than 2 Years
B2 Agonist Bronchodilators
- B - Oral beta2 agonists are not recommended for acute asthma in infants.
- A - For mild to moderate acute asthma, a pMDI + spacer is the optimal drug delivery device.
Steroid Therapy
- B - Consider steroid tablets in infants early in the management of moderate to severe episodes of acute asthma in the hospital setting.
- GPP - Steroid tablet therapy (10 mg of soluble prednisolone for up to three days) is the preferred steroid preparation for use in this age group
Ipratropium Bromide
- B - Consider inhaled ipratropium bromide in combination with an inhaled beta2 agonist for more severe symptoms.
Special Situations
Difficult Asthma
- D - Patients with difficult asthma should be systematically evaluated, including:
- Confirmation of the diagnosis of asthma and
- Identification of the mechanism of persisting symptoms and assessment of adherence with therapy
- D - This assessment should be facilitated through a dedicated multidisciplinary difficult asthma service, by a team experienced in the assessment and management of difficult asthma.
Factors Contributing to Difficult Asthma
Poor Adherence
- C - Poor adherence with maintenance therapy should be considered as a possible mechanism in difficult asthma.
Psychosocial Factors
- C - Healthcare professionals should be aware that difficult asthma is commonly associated with coexistent psychological morbidity.
- D - Assessment of coexistent psychological morbidity should be performed as part of a difficult asthma assessment. In children this may include a psychosocial assessment of the family.
Dysfunctional Breathing
- D - Dysfunctional breathing should be considered as part of a difficult asthma assessment.
Allergy
- C - In patients with difficult asthma and recurrent hospital admission, allergen testing to moulds should be performed.
Monitoring Airway Response
- B - In patients with difficult asthma, consider monitoring induced sputum eosinophil counts to guide steroid treatment.
Asthma in Pregnancy
Natural History
- D - Offer prepregnancy counselling to women with asthma regarding the importance and safety of continuing their asthma medications during pregnancy to ensure good asthma control.
- C - Monitor pregnant women with asthma closely so that any change in course can be matched with an appropriate change in treatment.
- GPP - Advise women who smoke about the dangers for themselves and their babies and give appropriate support to stop smoking
Management of Acute Asthma in Pregnancy
- C - Give drug therapy for acute asthma as for the non-pregnant patient.
- D - Deliver oxygen immediately to maintain saturation above 95%.
- D - Acute severe asthma in pregnancy is an emergency and should be treated vigorously in hospital.
- GPP - Continuous fetal monitoring is recommended for severe acute asthma.
- GPP - For women with poorly controlled asthma during pregnancy there should be close liaison between the respiratory physician and obstetrician.
Drug Therapy in Pregnancy
B2 Agonists
- C - Use beta2 agonists as normal during pregnancy.
Inhaled Steroids
- C - Use inhaled steroids as normal during pregnancy.
Theophyllines
- C - Use oral and intravenous theophyllines as normal during pregnancy.
- D - Check blood levels of theophylline in acute severe asthma and in those critically dependent on therapeutic theophylline levels.
Steroid Tablets
- C - Use steroid tablets as normal when indicated during pregnancy for severe asthma. Steroid tablets should never be withheld because of pregnancy.
Leukotriene Receptor Antagonists
- D - Do not commence leukotriene antagonists during pregnancy. They may be continued in women who have demonstrated significant improvement in asthma control with these agents prior to pregnancy not achievable with other medications.
Chromones
- C - Use chromones as normal during pregnancy.
Management During Labour
- GPP - Advise women that acute asthma is rare in labour.
- GPP - Advise women to continue their usual asthma medications in labour.
- GPP - In the absence of acute severe asthma, reserve caesarean section for the usual obstetric indications.
- C - If anaesthesia is required, regional blockade is preferable to general anaesthesia in women with asthma.
- GPP - Women receiving steroid tablets at a dose exceeding prednisolone 7.5 mg per day for more than two weeks prior to delivery should receive parenteral hydrocortisone 100 mg 6–8 hourly during labour.
- D - Use prostaglandin F2-alpha with extreme caution in women with asthma because of the risk of inducing bronchoconstriction.
Drug Therapy in Breastfeeding Mothers
- C - Encourage women with asthma to breastfeed.
- C - Use asthma medications as normal during lactation, in line with manufacturer's recommendations.
Occupational Asthma
Incidence
- B - In patients with adult onset asthma, or reappearance of childhood asthma, clinicians should be suspicious that there may be an occupational cause.
Diagnosis
Sensitivity and Specificity of Serial Peak Flow Measurements
- D - Objective diagnosis of occupational asthma should be made using serial peak flow measurements, with at least four readings per day.
Specific Bronchial Provocation Testing
- D - A negative specific bronchial challenge in a worker with otherwise good evidence of occupational asthma is not sufficient to exclude the diagnosis.
Management of Occupational Asthma
- D - Relocation away from exposure should occur as soon as diagnosis is confirmed, and ideally within 12 months of the first work-related symptoms of asthma.
Organisation and Delivery of Care, and Audit
Routine Primary Care
Access to Routine Primary Care
- A - All people with asthma should have access to primary care services delivered by doctors and nurses with appropriate training in asthma management.
Structured Review
- A - In primary care, people with asthma should be reviewed regularly by a nurse or doctor with appropriate training in asthma management. Review should incorporate a written action plan.
- B - Consider carrying out routine reviews by telephone for people with asthma.
- C - General practices should maintain a register of people with asthma.
- C - Clinical review should be structured and utilise a standard recording system.
- B - Feedback of audit data to clinicians should link guideline recommendations to management of individual patients.
Patient Subgroups
- D - Health professionals who provide asthma care should have heightened awareness of the complex needs of ethnic minorities, socially disadvantaged groups, adolescents, the elderly and those with communication difficulties.
Acute Exacerbations
- C - Manage hospital inpatients with asthma in specialist rather than general units.
- GPP - All services involved in the care of acute asthma should be staffed by appropriately trained personnel and have access to all the equipment needed to manage acute asthma.
- B - Clinicians in primary and secondary care should treat asthma according to recommended guidelines.
- A - Discharge from hospital or the emergency department should be a planned, supervised event which includes self management planning. It may safely take place as soon as clinical improvement is apparent.
- B - All people attending hospital with acute exacerbations of asthma should be reviewed by a clinician with particular expertise in asthma management, preferably within 30 days.
See original guideline document for types of audit in asthma care and a summary of recommended audits.
Patient Education and Self-management
Self-Management Education and Personalized Asthma Action Plans
- A - Patients with asthma should be offered self-management education that focuses on individual needs, and be reinforced by a written personalised action plan.
- A - Prior to discharge, in-patients should receive written personalised action plans, given by clinicians with expertise in asthma management.
Components of a Self Management Programme
- A - Introduce personalised asthma action plans as part of a structured educational discussion.
Compliance and Concordance
Compliance with Monitoring and Treatment
- GPP - Computer repeat-prescribing systems provide a useful index of compliance.
- GPP - Where the patient agrees with the health professional that the action is appropriate compliance is more likely.
Interventions to Improve Compliance and Concordance
- GPP - Provide simple, verbal and written instructions and information on drug treatment for patients and carers.
Implementation in Practice
- B - Initiatives which encourage regular, structured review explicitly incorporating self management education should be used to increase ownership of personalised action plans.
Practical Advice
- GPP - A hospital admission represents a window of opportunity to review self-management skills. No patient should leave hospital without a written personalised action plan and the benefit may be greatest at first admission.
- GPP - An acute consultation offers the opportunity to determine what action the patient has already taken to deal with the exacerbation. Their self-management strategy may be reinforced or refined and the need for consolidation at a routine follow up considered.
- GPP - A consultation for an upper respiratory tract infection or other known trigger is an opportunity to rehearse with the patient their self-management in the event of their asthma deteriorating.
- GPP - Brief simple education linked to patient goals is most likely to be acceptable to patients.
Definitions:
Grades of Recommendation
Note: The grade of recommendation relates to the strength of the evidence on which the recommendation is based. It does not reflect the clinical importance of the recommendation.
Grade A: At least one meta-analysis, systematic review or randomised controlled trial (RCT) rated as 1++ and directly applicable to the target population; or
A body of evidence consisting principally of studies rated as 1+, directly applicable to the target population, and demonstrating overall consistency of results
Grade B: A body of evidence including studies rated as 2++, directly applicable to the target population, and demonstrating overall consistency of results; or
Extrapolated evidence from studies rated as 1++ or 1+
Grade C: A body of evidence including studies rated as 2+, directly applicable to the target population and demonstrating overall consistency of results; or
Extrapolated evidence from studies rated as 2++
Grade D: Evidence level 3 or 4; or
Extrapolated evidence from studies rated as 2+
Good Practice Points (GPPs): Recommended best practice based on the clinical experience of the guideline development group.
Levels of Evidence
1++ - High quality meta-analyses, systematic reviews of randomised controlled trials (RCTs), or RCTs with a very low risk of bias
1+ - Well-conducted meta-analyses, systematic reviews of RCTs, or RCTs with a low risk of bias
1- - Meta-analyses, systematic reviews of RCTs, or RCTs with a high risk of bias
2++ - High quality systematic reviews of case control or cohort studies. High quality case control or cohort studies with a very low risk of confounding or bias and a high probability that the relationship is causal
2+ - Well-conducted case control or cohort studies with a low risk of confounding or bias and a moderate probability that the relationship is causal
2- - Case control or cohort studies with a high risk of confounding or bias and a significant risk that the relationship is not causal
3 - Non-analytic studies (e.g., case reports, case series)
4 - Expert opinion