Pulmonary Flashcards
safety value
prevents edema formation
lymph
by product of filtrate and contains intracellular debris
proteins in lymph because interstitial oncotic pressure
dynamic compression
when organism can move limbs and because of movement can compress and displace fluid in one direction
-alternating expansion/ collapsing during ambulation
gravity
force for fluid flow
lymphatic obstruction
bad!! could cause fluid buildup, increases concentration of RBC
compliance equation
C= change volume/ change in pressure
V(dot) D
anatomical deadspace
deadspace ventilation important b/c represents airflow without gas exchange
-blood doesn’t get oxygenated, no CO2 exchange
-“parent” branches of bronchi
V (dot) A
alveolar ventilation
amount of air that gets to alveoli per unit of time
-branches 17+ of bronchi, where gas exchange occurs
alveolar ventilation equation
Va= Ve-Vd
V (dot) e
minute ventilation
Ve= RR * TV (how much air comes in and out)
rib cage recoil
recoil in 2 directions, inward and outward
lung recoil
recoil inward
chest wall recoil profile
inward pressure corresponds to lung, happens at high long volume
outward pressure at low lung volume
lung compliance equation
change volume/ change in transmural pressure
eupovea
normal quiet breathing
dyspovea
labored breathing
tachypovea
hyperventilating
alveolar stability
distendable
recoil
BUT they always want to collapse
surfactant
produced by alveolar type II cells, amphipathic
reduce surface tension
atelectasis
alveolar collapse, lost stability
negative pleural pressure
results from elastic recoil of lungs and chest wall pulling in opposite directions
pleural cavity
potential space between ribs and lungs
factors that affect diffusion capacity for lung
lung volume
change in PO2 or CO2
V/Q matching
