Recap from Exam 1

Question 1

What are SI unite for

Force

Pressure

Energy (work)

Power

Answer 1

Force (Newton)

Pressure (Pascal)

Energy (Joule)

Powert (Watt)

Question 2

What are the units for pressure

Answer 2

1 atm =

101. 33 kPa
102. 3 mbar

760 mmHg

1033. 6 cmH₂0
1034. 7 psi

Question 3

What are the EBV amounts?

Answer 3

Males 70-75 ml/kg

Females 60-65 ml/kg

Infants 80-90 ml/kg

Question 4

what is the formula for EBL

Answer 4

Question 5

What percent of the body is

Total fluid

Intracellular

extracellular

Answer 5

total = 62 %

intracellular = 40 %

extracellurar = 22 %

plasma = 4.3%

Insterstitial = 15.7%

Question 6

What is the law that describes balances of forces on a sphere?

Answer 6

LaPlace’s Law

P = 2T/R

Question 7

what formulat represents laminar flow?

Answer 7

Hagen-Poiseuille equation

Question 8

what formula represents turbulent flow?

Answer 8

Fanning’s equation

Question 9

What formula is associated with gas velocities?

Answer 9

Reynold number

< 2000 = laminar flow

> 2000 = turbulent flow

Question 10

What is formula for continuity equation? what can it be used for ?

Answer 10

v₁a₁=v₂a₂

v= velocity

a = area (circal area a=πr²)

used to determine fluid velocity when tube diameter is increase or decreased

Question 11

what is the law associated with hydrostatic pressure?

Answer 11

pascal’s law

Question 12

convert the pressure of H20 to pressure of Hg

Answer 12

1 mmHg = 1.36 cmH20

Question 13

what is the hydrostatic pressure of a column of blood?

Answer 13

1’’ blood = 2 mmHg

Question 14

What does the graph of FA/FI ratio represent?

Answer 14

build of alveolar gas concenterations related to time

the more soluble the slower they approach their final values

vice versa for less soluble

example Nitrous Oxide is not soluble in the blood so the alveolar concentration increase quickly

Question 15

what is the shape of a does response curve?

Answer 15

sigmoid

Question 16

What is formula for Time constant?

Answer 16

time contanstant = volume/flow

flow = Q

Q = P/R

P = F/A

F = mass x a

Question 17

what is the time contstant of anesthesia circuit?

Answer 17

5 min

Question 18

what is the concentration of in a 1% solution

Answer 18

1 gm/1 dl

or

move decimal place 1 to right

i.e. 2 % = 20 mg/ml

Question 19

what is concentration in 1:1000 solution

Answer 19

1 gm in 1000 ml

or 1000 mg/1000 ml

so

1 mg/ml

Question 20

what is the law that is related to the action of surfactant?

Answer 20

Laplace’s law

Question 21

what is the action of surfactant?

Answer 21

As surface area decreases

amount of surfact/unit area increases

so tension(T) decreases

and pressure (P) decrease proportional to T

Question 22

What is formula for compliance?

Answer 22

C = V/P

change in volume / change in pressure