croup (PIV, paraninfuelnza virus) Flashcards
Croup aka?
laryngotracheobronchitis
Croup define?
= viral infection of larynx, trachea and upper bronchi causing stridor and barking cough in infants & toddlers.
Stridor happens why?
larynx swollen > narrowed
2 main symptoms of croup?
Stridor
Barking cough
Croup is URTI or LRTI?
URTI
Pathophysiology of croup step by step?
Parainfluenza virus infects larynx, trachea, upper bronchi > inflammation and swelling in URT narrows it > swollen larynx does not let ait through making stridor.
most common organism causing croup?
parainfluenza virus
other viruses causing croup?
-3
Adenovirus
Influenza
Respiratory syncytial virus
are lungs effected in croup?
so if O2 sats are low what does this mean?
no
air not getting through URT (larynx, trachea etc.)
when is it most common?
winter
how long does it last?
1 - 2 days
which drugs helps a lot?
dexamethasone
is admission common for croup?
no, rare to admit
child with croup, what should you as doctor not do?
do not distress
why do you not distress child with croup?
upset child with croup and he will breathe hard, hard breathing ↑resistance in airways > resp distress
sign on CXR?
steeple sign
steeple sign cause?
Inflammation + oedema around upper trachea > narrows
Simple Viral Croup can complicate to?
-2
Croup superinfection > 2° bacterial tracheitis
hypotensive shock > anaphylaxis
anaphylaxis treatment?
give adrenaline
symptoms of croup?
-5
Stridor Barking cough Fever Worse at night Coryzal symptoms
category of diagnosis?
Clinical
1st line drug?
route?
ORAL DEXAMETHASONE
if dexamethasone not available,
what other drug can you give instead?
prednisolone
When do you admit a child with croup?
-4
inspiratory stridor at rest
agitated
restless
RDS signs
