Pressure

Question 1

What is Newtons 2nd law?

Answer 1

The energy required to move an object or Force is equal to mass times acceleration. F (Newtons) = M x A

Question 2

What is the measurement for acceleration?

Answer 2

Acceleration (constant) = 9.81 m/sec^2

Question 3

1 kPa = ? cmH20

Answer 3

10.2 cm H2O

Question 4

1 atm = ? mmHg

Answer 4

760 mmHg

Question 5

1 kPa = ? mmHg

Answer 5

7.5 mmHg

Question 6

Definition of Pressure?

Answer 6

Force applied over a surface (area)

Question 7

Pressure equation?

Answer 7

P = f / a

p= pressure
f= force (Newton)
a= area of an object

Question 8

How do you get an area of a circle when given only the diameter? Example: give the area of a circle with a diameter of 6 cm.

Answer 8

First convert centimeters to meters. 6 cm/ 1000 cm = 0.006 meters
6 cm = (0.006 m / 2) = radius ^2 x Pie (3.14) = 0.00002826 or 2.826 x 10 -5

Question 9

How much pressure is 424 kPa in mmHg?

Answer 9

760 mmHg = 101.325 kPa

424 kPa x 760 mmHg = 322240/101.325 kPa = 3179 mmHg

Question 10

What is absolute pressure?

Answer 10

atmospheric pressure + gauge pressure

Question 11

Bourdon gauge is measured how?

Answer 11

gauge pressure - atmospheric pressure

Question 12

Newtons 3 Third Law

Answer 12

For every action, there is an equal and opposite reaction.

Question 13

Force (Newton) equation?

Answer 13

f (Newton) = m (mass) x a (acceleration)

Question 14

What is Newtons second law describing?

Answer 14

The energy required to move an object - force (Newton)

Question 15

1 atm = ? kPa

Answer 15

101.325 kPa

Question 16

Is the force applied over a large surface greater or smaller than a small surface? Example: plywood on someone’s forehead vs a nail!

Answer 16

The larger surface (plywood) exerts less pressure over a larger surface area than the smaller surface (nail).

Question 17

What is a manometer?

Answer 17

A gauge that measures the gravitational force exerted by the column of liquid.
NOT used in anesthesia

Question 18

What is a Bourdon gauge?

Answer 18

Aneroid meter = without water

Question 19

What is Daltons Law of Partial Pressure?

Answer 19

Total pressure exerted by a gaseous mixture is equal to the sum of the partial pressures of each individual component. Example: room air = 760 mmHg (barometric pressure at sea level)
Nitrogen pressure = 593 mmHg
Oxygen pressure = 159 mmHg
Argon pressure = 7 mmHg
Carbon Dioxide = 0.2 mmHg
Add them together and you get a total pressure of 760 mmHg.

Question 20

How do you calculate FiO2?

Answer 20

Partial pressure of any given gas / total pressure of all gasses.
Example: oxygen = 159 mmHg/760 mmHg=0.209 x 100% = 21% FiO2