Medical Gases

Front 1

what method of heat transfer requires no direct contact?

Back 1

radiation

Front 2

what would help decrease a patients loss of body heat?

Back 2

increase the temp of the room - mover the patient away from cold windows

Front 3

which design components of an air injector would result in entraining the greatest amt of air?

Back 3

small orifice jet and large entrainment ports

Front 4

what represents a direct measure of the kinetic activity of water vapor molecules?

Back 4

water vapor pressure

Front 5

what is the internal force that opposes the flow of fluids?

Back 5

viscosity

Front 6

in what processes of gas compression or expansion does the temp remain constant?

Back 6

isothermal

Front 7

what will occur when a gas undergoes expansion?

Back 7

molecular collisions decrease

Front 8

the peak pressure on a ventilator reads 40 cm H2O. what is the pressure in mmHg?

Back 8

29.6 mm Hg

Front 9

what occurs when the temp of a saturated gas drops down to its dew point?

Back 9

excess water vapor will condense as visible droplets

Front 10

According to Avogadro's law under standard conditions of temp and pressure, 1 mol of any gas occupies ___?

Back 10

22.40 L

Front 11

what is the term for the temp at which water vapor in gas begins to condense back into a liquid?

Back 11

dew point

Front 12

what temp is necessary to liquify oxygen at 1 atm pressure?

Back 12

-183.0 degrees C

Front 13

At what temp does all kinetic activity of matter cease?

Back 13

0 degrees K

Front 14

how can the internal energy of a substance be increased?

Back 14

performing work on the substance and by heating the substance

Front 15

a near-drowing patient has a recorded boy temp of 30 degrees C. what is the equivalent temp in Fahrenheit?

Back 15

86 degrees F

Front 16

In international system (SI) units, what is the quantity of matter that contains 6.023x10 23rd power atoms, molecules or ions?

Back 16

mole (mol)

Front 17

what is the physical process whereby the gaseous form of a substance is changed back into its liquid state?

Back 17

Condensation

Front 18

what are good clinical examples of the principle of capillary action?

Back 18

capillary stick blood samples, absorbent humidifier wicks, certain medical dressings

Front 19

what factors determine how much of a given gas can dissolve in a liquid?

Back 19

solubility coefficient of the gas,temperature of the liquid, gas pressure above the liquid

Front 20

what is the term for the ratio of the actual water vapor present in a gas compared with the capacity of that gas to hod the vapor at a given temp?

Back 20

relative humidity

Front 21

what is the common British unit of pressure?

Back 21

lb/in squared

Front 22

what is the physical process whereby atoms or molecules tend to move from an area of higher concentration or pressure to an area of lower concentration or pressure?

Back 22

Diffusion

Front 23

what would be the worst heat conductor?

Back 23

air

Front 24

what is the absolute humidity of saturated gas at a normal body temp. (37 C)?

Back 24

43.8 mg/L

Front 25

a gas at 50 C with a relative humidity of 100% is cooled to 37 C. what will occur?

Back 25

Condensation on surfaces, Visible droplet formation, Warming of the adjacent air

Front 26

what are some facts regarding boiling?

Back 26

boiling liquid requires more energy than it does to evaporate it
A liquid's boiling point varies with the atmospheric pressure

Front 27

what is the primary means by which heat transfer occurs in fluids?

Back 27

convection

Front 28

what is the equilibrium condition in which a gas holds all the water vapor molecules that it can?

Back 28

saturation

Front 29

what is the phenomenon whereby a liquid in a small tube tends to move upward against the force of gravity?

Back 29

capillary action

Front 30

what conditions tend to cause laminar flow to become turbulent?

Back 30

High linear gas velocity, high gas density, low gas viscosity, large tube diameter

Front 31

what is the temperature at which the vapor pressure of a liquid equals the pressure exerted on the liquid by the surrounding atmosphere?

Back 31

Boiling point

Front 32

What is a clinical example of using the principle of convection to transfer heat?

Back 32

Heated, enclosed infant incubators

Front 33

One atmosphere of pressure is equal to what?

Back 33

29.9 inches Hg
14.7 lb/in squared
1034.0 g/cm squared
760.0 mm Hg

Front 34

If the absolute humidity in a medical gas being delivered to a patient is 14 mg/L, then what is the body humidity (BH)?

Back 34

32%

Front 35

what force is responsible for the spherical shape of liquid droplets and their ability to keep this shape when placed into an aerosol suspension?

Back 35

Surface tension

Front 36

What pattern of flow in which a fluid moves in descrete cylindrical streamlines?

Back 36

Laminar

Front 37

What statement(s) describe gasses?

Back 37

Gases exhibit the phenomenon of flow. Molecular forces of attraction are minimal. Gases are easily compressible. Gases expand to fill their container

Front 38

what is the usual method of monitoring the remaining contents in a gas filled cylinder?

Back 38

read the pressure gauge

Front 39

what are some advantages of a centrally located, piped in bulk O2 system?

Back 39

more convenient and less hazardous than cylinders, oxygen already reduced to its working pressure, less risk of the O2 supply being depleted.

Front 40

to clean a cylinder valve outlet of foreign material what should you do?

Back 40

quickly open, then close, the valve