00:00
All right, we’ve covered
a lot of topics today.
00:03
The first one is is we covered how
we describe the respiratory cycle
and remember the most important
things with the respiratory cycle
is developing that
negative pleural pressure
so that they will translate
that into alveolar pressure
and therefore be able to
pull air into the lungs.
00:23
We’re able to apply our methods
to describe ventilation
for both minute and
alveolar ventilation.
00:31
And remember the big
difference between those two
is alveolar ventilation
accounts for deadspace.
00:36
We also talked a lot about how
resistance affects ventilation
and that mainly had to do with
the radius of the airway.
00:45
The smaller the radius,
the more resistance.
00:49
We then also talked
about work of breathing
and how forces such as
compliance and surface tension
affect how much work that you
have to do during breathing.
00:59
And finally, we talked
through how restrictive and
obstructive lung diseases
affect our work of breathing.
01:08
Where restrictive lung disorders
cause us to have to generate
greater pleural pressures
and greater pressures to
be able to ventilate.
01:18
And therefore, oftentimes, they
ventilate at a faster rate
so that they don’t have to go
against this work of breathing.