Physics and chemistry

Question 1

is the vapor pressure a function of volume, temperature, or pressure?

Answer 1

temperature

Question 2

if Iso is added to a flask of Oxygen, what is the percent of oxygen and percent of iso In the flask above the liquid?

Answer 2

the VP of iso is 240 mmHg the Partial pressure of oxygen is 760 mmHg
The partial pressure of O2 after Iso is added is 520 mmHg (760-240=520mmHg)
%O2 = (520mmHg / 760 mmHg) x 100% = 68.4% O2
%iso = (240mmHg / 760 mmHg) x 100% = 31.6% iso

Formula is %gas = P gas / P total

Question 3

if enflurane is added to a flask of O2 , what is the % of enflurane and % O2 in the flask above the liquid?

Answer 3

Enflurane 172 mmHg
760-172 = 588mmHg
%O2 = (588 / 760) x 100 = 77.4%
% En = (172 / 760) x 100 = 22.6%

Question 4

if des is added to a flask of O2, what is the % of Des and the %O2 in the flask above the liquid?

Answer 4

Des 669 mmHg
760- 669= 91mmHg
%O2 = (91 / 760) x 100 = 12%
% des = (669 / 760) x 100 = 88%

Question 5

Adding VAA to the wrong vaporizer:

what are the mnemonics?

Answer 5

HLH- high VP in Low VP = High concentration delivered

LHL- Low VP in High VP = Low concentration delivered

Question 6

If halothane is added to Enflurane or servo what concentration will be delivered?

Answer 6

hal- 244 enf 172 Sevo 170
HLH
High concentration delivered

Question 7

If halothane is added to iso vaporizer what concentration would be delivered?

Answer 7

Halothane 244 Iso 240

about the same

Question 8

If ENF or Sevo added to Halothane or Iso vaporizer what concentration would be delivered?

Answer 8

ENF 172 sevo 170 Hal 244 iso 240
LHL
Low concentration

Question 9

how does the law of laplace: Spherically shaped apply to alveoli?with ARDS

Answer 9

b/c pressure in the smaller alveoli is higher than th larger alveoli.
the law of laplace explains why smaller alveoli empty into larger alveoli causing atelectasis in pts w/ ARDS

Question 10

how does the law of laplace: Spherically shaped apply to alveoli? with Normal lungs

Answer 10

for alveoli with surfactant , tension increases w/ increases in radius, b/c alveolar wall tension increases in proportion to increases in radius, the pressure within the alveolus does not change. the law of laplace explains why small alveoli do not empty into larger alveoli

Question 11

what is the property of a fluid that determines flow when the flow in laminar

Answer 11

viscosity

Question 12

when flow in turbulent what determines flow?

Answer 12

Density