Respiratory Flashcards
(40 cards)
Features severe asthma exacerbation
Peak flow 33-50% predicted
Cannot complete sentences
RR>25
HR>110
Sats>92%
Features life threatening asthma exacerbation
Peak flow <33% predicted
Sats<92%
Silent chest, cyanosis, or poor respiratory effort
Arrhythmia or hypotension
Exhaustion, altered consciousness
Risk factors severe asthma
Prev ICU/admissions
3+ classes of medication
High use SABA?3x per week
Non compliance/psychosis
Smoking
Management acute exacerbation asthma
O2, salbutamol nebs, admit
If mild:
5-10 puffs salbutamol using tidal breathing + aerochamber
prednisolone 40mg OD 5 days
+/- amoxicillin 500mg TDS 5 days
Quadruple inhaler ICS dose until recovered
How do you diagnose asthma in adults with spirometry?
If pre BD spirometry shows obstruction (FEV1/FVC ratio <0.7) perform reversibility with SABA
12% (and >200mls) increase in FEV1
How do you diagnose asthma in adults with peak flow diary?
Complete 2-4 week peak flow diary
Evidence of 20% peak flow variability supports asthma diagnosis.
Once on treatment with ICS expect peak flow to increase and variability reduce
How do you diagnose asthma in adults with FeNO?
FeNO >40 consistent with
asthma (steroid naive)
Triggers for asthma exacerbation
Allergens- hayfever, rhinitis
Exercise
Cold air
Medications, e.g. aspirin and beta blockers
Occupational
Viral infections
6 questions to assess asthma control
Nocturnal disturbance- woken with coughing and wheezing?
Impact on ADLs
Cough, wheeze, chest tightness, breathlessness, during the day?
Reliever therapy use
Concordance with preventer use
Use of PO corticosteroids
1st step asthma management in adults
ICS+immediate acting LABA as MART regime
Symbicort Turbohaler 200/6
1 dose PRN up to 8 doses/day
Step 2 asthma management adults
MART regime:
Symbicort Turbohaler
200/6, 1 puff BD
Max doses/day: 12
Fostair NEXThaler
100/6, 1 puff BD
Max doses/day: 8
Trial montelukast 10mg at night 6 weeks
Step 3 asthma management adults
MART regime:
Symbicort Turbohaler
200/6, 2 puff BD
Max doses/day: 12
Fostair NEXThaler
100/6 2 puffs BD
Max doses/day: 8
Trial montelukast 10mg at night 6 weeks
Step 4 asthma management in adults
Continue MART regime + LAMA
Add on Spiriva Respimat
2.5mcg 2 doses OD
Step 5 asthma management adults
Referral ?biologics
Symbicort Turbohaler
400/12, 2 doses BD + spiriva respimat 2.5mcg 2 doses OD
When would you refer adults with asthma?
-Diagnostic uncertainty
* Complex comorbidity
* Suspected occupational asthma
* Poor control following treatment at Step 4
* ≥2 courses of oral steroids/ year
Step 1 children with asthma
Age<6
Clenil 100mcg 1 dose BD + SABA PRN (with spacer)
Age 6-11
Budesonide100mcg Turbohaler 1 dose BD + SABA PRN (Terbutaline 500mcg Turbohaler)
Age>12
Budesonide 100mcg Turbohaler 1-2 doses BD + SABA PRN (Terbutaline 500mcg Turbohaler)
Step 2 children with asthma
Age<6
6 week trial montelukast 4mg ON
Age 6-11
6 week trial montelukast 5mg ON
Age>12
6 week trial montelukast 5mg ON or 10mg if age>15
Step 3 children with asthma
Age<6 refer, mod dose ICS + SABA Clenil modulite 100 mcg
2 doses BD via spacer
Age 6-11
ICS/LABA plus PRN SABA
Symbicort 100/6 Turbohaler 1 dose BD
Age>12
Adult MART Symbicort 100/6 Turbohaler 1 dose BD
(max 8 doses/24 hrs) + emergency SABA
Step 4 children with asthma
Age<6 Refer
Age 6-11
Refer
ICS/LABA Mod Symbicort 100/6
Turbohaler 2 doses BD
Age>12
MART Symbicort 200/6
Turbohaler 1-2 doses BD
(max 8 doses/24 hrs)
Diagnosis asthma in children
Peak flow diary (1-2 week) age 5-17
Skin prick test, Allergen-specific IgE, Blood eosinophils age 3-17
Spirometry with reversibly testing age ≥ 12
Fractional exhaled Nitric Oxide (FeNO) age ≥ 12
If no objective evidence but strong clinical suspicion asthma in children?
Perform treatment trial
Including in children age 3-5 years
with “episodic wheeze”:
* Commence ICS for 8 weeks: Clenil
modulite 200mcg BD
* Review response at 8 weeks
No response
- Discontinue treatment
- Consider alternative diagnosis
Positive response
- Discontinue treatment
- If symptoms recur, restart low dose
ICS as maintenance therapy
How to differentiate asthma from COPD
Asthma: response to SABA>200 mL and >12% improvement of FEV1.
Completely reversible airway obstruction do not have COPD
If a patient with a high clinical suspicion of asthma, consider a trial of 40 mg of prednisolone OD for 2 weeks, then repeat spirometry.
Features bronchiectasis
Permanent abnormal dilatation of the airways
Impaired mucociliary clearance
Excessive inflammation of airways, mucus production, and bacterial colonisation.
chronic productive cough.
unexplained haemoptysis
Exertional dyspnoea
Recurrent chest infections
Signs of over-inflation of chest
Finger clubbing (now rare)
Pseudomonas on sputum culture
Underlying causes bronchiectasis
Post TB, Measles, pertussis, pneumonia
Cystic fibrosis
COPD
IBD, RA