00:01
A condition most likely represent an acute otitis media.
00:07
So the three -year -go was two days of ear pain, tugging at year -end, a bulging hyperamic and a dull tympanic membrane without rupture.
00:20
So most likely diagnosis is, again, acute otitis media, specifically in the left ear.
00:48
So this is the diagnosis.
00:53
Now, the second, what is the pathogenesis? so this is usually an upper respiratory tract infection precede the aom.
01:36
Now, the infection would cause eustachian tube dysfunction.
01:56
So usually the young kids ' eustachian tube is not slanted downwards.
02:02
Instead, it's pretty flat.
02:03
So when there's a per respiratory infection, this is causing a lot of mucus and fluid, also causing eustachian tube to be blocked.
02:14
And then because of that, this lead to fluid accumulation in the middle year.
02:38
And these fluids are coming from the eustachian tube.
02:42
Now, the buildup fluid actually become infected, and we call this secondarily infection.
02:59
Infected.
03:09
Usually by pathogens such as streptococcus pneumonia.
03:28
So these are bacteria.
03:31
These are common streptococcus pneumonia...