Respiratory Flashcards
(70 cards)
Intensity of acute asthma
Moderate:
* Peak flow >50 %
* Normal speech
Severe:
* Peak flow 33-50%
* Unable to complete full sentence
* SpO2 92%+
* RR 25+ (13y+), >30 (5-12y), >40 (1-5y)
* HR >110 (13y+), >125 (5-12y), >140 (1-5y)
Life-threatening:
* Peak flow <33%
* SpO2 <92%
* Hypotension
* Altered consciousness and exhaustion
* Cyanosis
* Cardiac arrythmias and silent chest
Management of moderate acute asthma in adults
SABA as required via spacer: 4 puffs initially, 2 mins, 2 puffs, 2 mins 2 puffs (upto max 10).
Prednisolone 40-50mg /day for 5 days.
Hospital admission if:
* Inadequate treatment response
* Previous severe attack
* Pregnant
* Disabled
* If occurs after midday
Management of moderate acute asthma in children
SABA as required via spacer: 1 puff every 30-60 seconds (max 10).
Admit to hospital.
Management of severe/life-threatening acute asthma in adults
- 5mg (high-dose) salbutamol via oxygen-driven nebuliser + 40-50mg prednisolone for 5 days.
- Nebulised ipratropium
- IV magnesium or aminophylline
Management of severe/life-threatening acute asthma in children >5y
- 5mg (high-dose) salbutamol via oxygen-driven nebuliser + 30-40mg prednisolone for 3 days.
- Nebulised ipratropium
- IV magnesium or aminophylline
Management of severe/life-threatening acute asthma in children aged 2-5
- 2.5mg (high-dose) salbutamol via oxygen-driven nebuliser + 20mg prednisolone for 3 days.
- Nebulised ipratropium
- IV magnesium or aminophylline
Prednisolone dose for children <2 years for acute severe/life-threatening asthma
10mg for 3 days
Alternative if oral prednisolone can’t be used in acute asthma
Equivalent doses of IM methylprednisolone or IV hydrocorisone
Lifestyle advice in chronic asthma
Weight loss
Smoking cessation
Breathing exercise
Identify and avoid triggers
Keep warm and dry in cold weather
Management of asthma in adults and children >12
- AIR therapy: low-dose inhaled corticosteroid (budesonide) and formoterol PRN.
If initial symptoms severe enough to bypass step 1, or if step 1 insufficient (reliever required 3/7 OR 1/7 nighttime waking due to symptoms) - Low-dose MART therapy: low-dose ICS and formoterol.
If step 2 insufficient: - Moderate-dose MART therapy: moderate-dose ICS and formoterol.
If step 3 insufficient: - Check fractional exhaled nitric oxide (FeNO) level and blood eosinophil count.
If raised, refer to specialist. If not: - Trial adding LTRA (Montelukast) or LAMA for 12 weeks
If controlled, continue. If no improvement at all, try the other one. If improved a bit but inadequate: - Trial adding both LTRA (Montelukast) and LAMA for 12 weeks.
- Response still inadequate, refer to specialist.
How should patients >12 on SABA alone (old asthma guidelines) be switched?
Controlled: leave it.
Uncontrolled: switch to AIR PRN.
How should patients >12 on low-dose ICS + SABA/LABA/LTRA (old asthma guidelines) be switched?
Controlled: leave it.
Uncontrolled: switch to low-dose MART.
How should patients >12 on moderate-dose ICS + SABA/LABA/LTRA (old asthma guidelines) be switched?
Controlled: leave it.
Uncontrolled: switch to moderate-dose MART.
How should patients >12 on high-dose ICS (old asthma guidelines) be switched?
Controlled: leave it.
Uncontrolled: specialist referral
Why have asthma guidelines changed recently?
MHRA UPDATE: risk of severe asthma attacks and increased mortality associated with overuse of SABA with or without anti-inflammatory maintenance therapy in patients with asthma.
Management of asthma in children aged 5-11
- ICS BD + SABA prn
- Switch to low-dose MART (formoterol + ICS)
- Switch to moderate-dose MART
- LRTA for 8-12 weels and assess effectiveness
If low/moderate dose MART not manageable, use ICS/LBA BD + SABA prn.
Management of asthma in children aged <5
- low-dose ICS BD + SABA prn for 8-12 weeks
If symptoms do not resolve: Check inhaler technique, adherence, alternative diagnosis, and environmental factors and then fix them. If not, refer to specialist.
If symptoms resolve: consider stopping treatment and reviewing after 3 months (may be childhood asthma only). If symptoms reoccur:
2. Restart low-dose ICS BD + SABA prn AND THEN increase to moderate-dose ICS BD + SABA prn
3. Trial of + LRTA for 8-12 weeks.
If improves, continue. If no improvement, refer to specialist.
Complete control of asthma symptoms
Signs (7) and action
- No daytime symptoms
- No night-time awakening
- No asthma attacks
- No relievers
- No exercise limitation
- FEV1 and or PEF >80% predicted/best
- Minimal side effects from treatment
When controlled for at least 3 months, maintain patients on lowest possible dose of ICS (reduce by 25-50% every 3 months). Review regularly.
What is COPD?
Chronic obstructive pulmonary disorder - progressive and irreversible condition which limits airflow due to obstructive bronchiolitis (inflammed bronchioles) and emphysema (damaged, ill-defined alveoli), resulting in symptoms such as dyspnoea, wheeze, chronic cough, sand sputum production.
COPD management in patients with asthmatic features
- SABA or SAMA prn
- LABA + ICS
If pt has day-to-day symptoms affecting QOL, or has 1 severe or 2 moderate exacerbations within a year:
- LABA + ICS
- LAMA (if using SAMA discontinue)
- +Theophylline, oxygen therapy, and/or mucolytics
Ensure COPD patients are offered pneumococcal and influenza vaccine
COPD management in patients with non-asthmatic features
- SABA or SAMA prn
- LABA + LAMA (if using SAMA discontinue)
If pt has day-to-day symptoms affecting QOL, or has 1 severe or 2 moderate exacerbations within a year:
- LABA + LAMA (if using SAMA discontinue)
- ICS
If no improvement after 3 months, refer to LABA + LAMA and:
- ICS
- +Theophylline, oxygen therapy, and/or mucolytics
Ensure COPD patients are offered pneumococcal and influenza vaccine
What is “asthmatic features” in COPD
Asthmatic features and/or features suggesting steroid responsiveness in this context include:
* any previous secure diagnosis of asthma or atopy
* a higher blood eosinophil count
* substantial variation in FEV1 over time (at least 400 ml)
* substantial diurnal variation in peak expiratory flow (at least 20%).
What is given following a COPD exacerbation?
A rescue pack of prednisolone (or another oral corticosteroid) plus one of:
* Amoxicillin
* Doxycyline
* Clarithromycin (avoid if taking prophylactic azithromycin)
Treatment of acute COPD exacerbation
- SABA/SAMA + Prednisolone
- Aminophylline
- Oxygen if required