Lower resp Flashcards
what are common lower resp conditions in children?
asthma bronchitis bronchiolitis bronchiectasis cystic fibrosis
what are common upper resp conditions in children?
croup
whooping cough
epiglottitis
what cells mediate allergic asthma?
Th2 T cells
what cells do activate Th2 T cells when allergens bind to them?
dendritic cells
what cytokine is involved in the inflammatory process of asthma?
leukotriene C4
what environmental factors are involved with asthma?
low birth weight prematurity parental smoking atopy cold air and exercise atmospheric pollution NSAIDs B blockers
what viruses most commonly cause viral chest infections in children?
rhinovirus
respiratory syncytial virus
state two clinical patterns of wheeze?
episodic viral wheeze
multiple trigger wheeze
what resp conditions could finger clubbing suggest?
CF and bronchiectasis
what signs on examination may be present for asthma?
wheeze
use of accessory muscles
what investigations can be done for asthma?
spirometry (FEV1:FVC <70% if poor control)
peak expiratory flow rate bronchial provocation tests exercise testing skin prick testing exhaled nitric oxide (NO production in bronchial epithelial cells is increased with Th2 driven eosinophilic inflammation
what investigation can be done to diagnosis CF?
chloride sweat test
what investigation can be done to rule out GORD?
oesophageal pH testing
what investigation can be done to exclude bronchiectasis ?
high resolution CT
what gene is associated with asthma?
ADAM33
what are the aims of good control of asthma?
full school attendance no sleep disturbance <2/week daytime symptoms no limitations of daily living no exacerbations using salbutamol <2/week
if asthma is suspected what treatment should be started?
inhaled corticosteroid
what are the 5 step wise management of asthma ?
as required SABA (short acting b-2 agonist - salbutamol)
regular inhaled corticosteroid
add on therapy
- LABA (salmeterol/formeterol)
- increase ICS dose
- stop LABA and start leukotriene receptor antagonist
increase ICS dose
regular oral steroids and refer to paediatrician
state the name of a leukotriene receptor antagonist
montelukast
if no treatment works for asthma was specialist medication can be used?
Omalizumab
what is the action of Omalizumab for asthma?
reduces free IgE in the blood. This reduces IgE mediated inflammatory response
what should LABA be prescribed with?
ICS
what ICS is used in children?
beclometasone
what should all children diagnosed with asthma have?
written asthma management plan
what are the signs of life threatening asthma exacerbation ?
O2 sats <92% PEFR <33% predicted silent chest altered GCS confusion exhaustion cyanosis
what is the immediate management of asthma exacerbation ?
oxygen
bronchodilators (inhaled SABA - if severe nebulised)
ipatropium bromide (anti-muscuranic)
corticosteroids (prednisolone)
what is the second line treatment for asthma exacerbation?
IV salbutamol
magnesium sulphate
what condition is exhaled nitric oxide raised in?
hay fever