physiology

Question 1

what shifts oxygen curve to the right?

Answer 1

acidosis, temp, inc PCO2, inc DPG

• dec O2 affinity and inc unloading

Question 2

what shifts oxygen dissociation curve to left?

Answer 2

dec Pco2, alkalosis, methb, COhb, dec DPG

inc affinity, dec unloading

Question 3

definition of a shunt?

Answer 3

no ventilation but normal perfusion

Question 4

pulmonary embolism phsyiologically creates what?

Answer 4

dead space

Question 5

what happens to lung blood distruibtuion during exercise?

Answer 5

blood is redistributed to the upper portions

Vd/VT falls

Question 6

if VD/VT does not fall during exercise what does that signify?

Answer 6

a pulmonary vascular issue

Question 7

what vasopressor to use for PAH?

Answer 7

vasopressin because it will not affect the pulmonary vasculature

Question 8

SILI can create what phenomenon?

Answer 8

pendelluft

Question 9

what is pendelluft?

Answer 9

intrapulmonary gas movement through different areas with differing time constants, concern for overdistension

Question 10

prone ventilation effect on compliance?

Answer 10

reduces chest wall complaince but improves lung complaince

Question 11

prone positioning on RV function?

Answer 11

improves RV unloading, and shifts septum right