Chapter 3: Respiratory system Flashcards
How should patients used DPI inhalers?
Need to breathe in fast and strong to create enough turbulence to lift the particles
these are breath actuated inhalers. Symbicort is an example. You can get a symbicort whistle to test if the patient has the ability to use the inhaler. If they breath in strong enough it will make a noise
Why should Beclometasone CFC-free MDIs (QVAR and CLENIL) have their brand endorsed on prescriptions? What is the combination inhaler also effected by this?
Because they are not interchangeable: QVAR has extra fine particles that can reach the lungs faster and quicker therefore its more potent (QVAR is 2 x as potent as Clenil)
FOSTAIR also affected- has extra fine particles (beclometasone and formeterol
Which beta blockers would we be most worried about in asthmatic patients? (5)
Non-cardioselective beta blockers, as these may be more likely to constrict airways:
Propranolol Sotolol Labetolol Carvedilol Timolol
The cardioselective ones (atenolol, bisoprolol) are less of a worry but should still be used with caution
How should a spacer be cleaned?
Wash it in mild detergent and allow to air dry, wipe mouthpiece free of detergent Do this once a month (more frequently will effect the electrostatic charge)
do not use a cloth to wipe as will create static
How often should a spacer be replaced?
Every 6-12 months
When would nebuliser adrenaline or budesonide be needed?
Child with severe croup
Not severe: oral dexamethasone or prednisolone usually used
When should nebulisers be considered in long term management of COPD or asthma?
Remains breathless after two weeks of correctly using optimal therapy
What proportion of nebulised drug will reach lungs?
10-30%
Diluent usually used in nebulisers: NaCl 0.9%
What ages are spacers recommended in children?
Up till the age of 5 for bronchodilators (SABA, LABA)
Ages 5-15 for ICS
What is the standard length of treatment with steroids for an asthma attack? Does this differ in children?
Prednisolone oral for 5 days in adult
Prednisolone oral for 3 days in child
IF NBM- IV hydrocortisone every 6 hours until conversion to oral
Can usually abruptly stop the steroid unless the patient has been on oral corticosteroids previously (step 5) for over three weeks
In what degree of asthma attack should we consider the use of high flow oxygen?
If it’s severe
Use SABA (e.g. Salbutamol) nebs plus high flow oxygen
Only SABA nebs needed if moderate
If oxygen, SABA and prednisolone are not sufficient for an asthma attack what can be considered?
Ipratropium bromide
IV aminophylline
Magnesium sulphate
If an attack is LIFE-THREATENING: immediately give ipratropium (don’t wait to see if response is poor)
Which patients are most likely to benefit from an aminophylline infusion in an asthma attack?
Those that have been taking theophylline oral
What is step 1 of the Asthma guidelines When should a patient be moved on to step 2?
PRN SABAs
Move up if needed more than TWICE a week or woken up once per week
What is step 2 of the asthma guidelines ?
SABA PRN + standard dose of ICS Recommended starting dose for adults: 400mcg beclometasone daily Do not go over 800 mcg daily
What is step 3 of the NICE asthma guidelines
Add a LTRA in addition to ICS and review in 4-8 weeks
Step 4 of the asthma treatment guidelines?
If asthma is uncontrolled in adults (aged 17 and over) on a low dose of ICS and an LTRA as maintenance therapy, offer a long-acting beta2 agonist (LABA) in combination with the ICS, and review LTRA treatment as follows:
discuss with the person whether or not to continue LTRA treatment
take into account the degree of response to LTRA treatment.
Step 5 of the asthma treatment guidelines?
If asthma is uncontrolled in adults (aged 17 and over) on a low dose of ICS and a LABA, with or without an LTRA, as maintenance therapy, offer to change the person’s ICS and LABA maintenance therapy to a MART regimen with a low maintenance ICS dose.
Stepping down: How often should asthma treatment be reviewed?
Every 3 months
Consider reducing ICS by 25-50% every 3 months
What age of child do the asthma guidelines become different?
NICE:
under 5
5-16
17+
Child under 5: asthma guidelines step 1?
SABA PRN
Consider moving to step 2 if child needs SABA more than twice per week, is woken at night once a week or had an exacerbation in last 2 years (same as adult guidance)
Child under 5: asthma guidelines step 2?
8 week trial of ICS
Child under 5: asthma guidelines step 3?
SABA PRN Plus ICS Plus montelukast
Child under 5: asthma guidelines step 4?
Refer to specialist