Anesthesia Equipment Ch. 16 Nagelhout Questions And Answers 100% Guaranteed Success 2024.
A Vapor is composed of - correct answer. molecules (in the gaseous state) of a substance that is a liquid at room temperature and 1 atmosphere of pressure
What prevents the vaporization coo...
A Vapor is composed of - correct answer. molecules (in the gaseous state) of a
substance that is a liquid at room temperature and 1 atmosphere of pressure
What prevents the vaporization cooling and slowing the rate of further vaporization -
correct answer. Cooper bc it has high thermal conductivity and high thermal capacity
The rate of vaporization depends on 3 things - correct answer. 1- the temperature
2- the vapor pressure of the liquid
3- the partial pressure of the vapor above the evaporating liquid
PP- Dalton's law (the total pressure of a mixture of gases is equal to the sum of the
partial pressures of the component gases
3- Amount of carrier Gas (N20 & O2) used
Boiling point - correct answer. Vapor pressure equals atmospheric pressure, all
liquid is in the vapor phase
Latent Heat of Vaporization - correct answer. Heat required to change liquid into a
vapor
Comes from liquid and environment
Vapor pressure - correct answer. Pressure exerted on walls of a container by
molecules that broke away from the liquid surface. Equilibrium will be achieved if
temperature remains constant. All volatile anesthetics have a specific vapor pressure.
The concentration can be calculated from the vapor pressure above the liquid
Volumes percent (Vol %) - correct answer. the volume of gas carried per 100
volumes of blood
"the number of units of volume of gas in relation to a total of 100 units of volume for the
total gas volume
,"Liquid inside closed container"
At constant temperature: (2) - correct answer. 1- number of molecules entering and
leaving liquid are equal
2- number of molecules in vapor phase stays constant
Saturated Vapor Pressure (SVP) - correct answer. Pressure created when
molecules "BOMBARD" the walls of container
When the gas phase on top of the liquid phase is saturated by the molecules of vapor (it
contains as much vapor as it can handle)
Volatile Anesthetic Agent (VAA) - correct answer. Liquid that has tendency to
change to a vapor at standard temperature and pressure
Higher volatility = - correct answer. stronger tendency to change to vapor = higher
SVP
SVP and Temperature Changes
Heat increases SVP (2)
What happens in the gas and liquid phase - correct answer. Gas phase: more
molecules enter gas phase
Less molecules "re-enter" liquid phase
Cooling decreases SVP
What happens in the gas and liquid phase - correct answer. gas phase: less
molecules enter gas phase
More molecules "re-enter" liquid phase
when the practitioner turns on the vaporizer, What happens to SVP when carrier gas
(N2O & O2) passes over the liquid in the vaporize and picks it up to deliver VAA to
patient? - correct answer. SVP decreases
What is needed continuously to vaporize anesthetic agents and maintain constant SVP
- correct answer. Heat
The liquid agent (e.g. Iso) generates more vapor as an "inherent attempt" to keep SVP
constant and this leads to - correct answer. heat being lost, and decreased
vaporizer output
, Concentration calibrated
(Variable bypass) - correct answer. -AUTOMATIC
-total carrier gas flow automatically divided into two paths
- one path flowing through vapor above liquid anesthetic
-the other bypassing the vapor chamber
-the two flows meet and mix at the outflow tract. The concentration of the anesthetic
determined by the flow ratio
3 MOST common variable bypass - correct answer. Datex Ohmeda Tec 3,4, and 5
Now, list all Variable-bypass Vaporizer - correct answer. Tec, 3,4,5,7
SevoTec
Aladin (Aisys, Avance)
Vapor 19
Vapor 2000 & 3000
Method of Vaporization for Variable-bypass Vaporizers - correct answer. Flow over
(including the Aladin for Des, which does not require added heat like the Tec 6)
Temperature compensation for Variable-bypass Vaporizers - correct answer.
Automatic temperature compensation mechanism
Calibration for Variable bypass - correct answer. Calibrated, agent specific
Position of Variable bypass - correct answer. Out of circuit
What type of Vaporizer has a Dual circuit where carrier gas is not split - correct answer.
Tec 6 (Desflurane)
Method of vaporization of Tec 6 - correct answer. Gas/Vapor blender (heat
produces vapor, which is injected into the Fresh gas flow)
Temperature compensation of Tec 6 - correct answer. Electronically heated to a
constant temperature (39 degrees C; thermostatically controlled)
Calibration of Tec 6 - correct answer. calibrated, agent specific
Position of Tec 6 - correct answer. out of circuit
capacity of Tec 6 - correct answer. 390 ml
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