Final Exam Flashcards
With regard to current, what does DC mean?
b. Electrons always travel in the same direction
With regards to electricity, what is micro shock?
< 1 mA
How many micro amps cause V-fib?
c. 150
What are potential sources of microshock?
a. Pacer wires
b. Swan Ganz Catheter
c. CVP catheter
d. ALL OF THE ABOVE
In the interest of electrical safety, an OR isolation power system should be ungrounded, while OR equipment should be grounded.
TRUE
The law of physics which describes the electrostatic interaction between electrically charged particles is known as:
c. Coulomb
With regard to [Ar]3d104s1, what does s1 mean?
c. one electron in the outermost orbital
This is in regards to metals having a nearly empty outer orbital. This particular metal is copper.
Ohm’s Law is best represented by which equation?
d. V = I × R
The term electricity can be defined as ‘the effects produced by moving charges’
True
Electrical potential is measured in
a. Volts
An increase in cardiac output would slow the onset of an inhalation anesthetic.
true
Which statement is correct summary of The Meyer-Overton Rule?
d) potency of anesthetic is directly proportional to its lipid solubility
The amount of gas dissolved is proportional to the temperature (T/F)
False - it’s inversely proportional
How much CO2 dissolved in 100cc of blood if PaCO2 is 100mmHg?
a. 6.7cc
A solution is considered supersaturated if
c. The solution contains more solute than allowed by the solubility.
Osmotic pressure is proportional to the volume of the solution.
False
According to Henry’s Law states that:
c. as pressure increases, solubility increases.
An example of how temperature has an effect on solubility, is best described by which of the following?
d. Less anesthetic gas is required to reach and maintain a patient at MAC when they are hypothermic.
Two liquids are miscible if they are soluble in each other in all proportions.
True
If an anesthetic (like all other compounds) has a smaller molecular weight, it tends to have smaller intermolecular attractions. Therefore:
a. A smaller anesthetic molecule will have a higher vapor pressure
In Boyle’s Law, Volume is proportional to pressure.
FALSE - volume is inversely proportional to pressure
What are some examples of Boyle’s law?
a. Breathing
b. Oxygen cylinders
c. Pushing air out of a syringe
d. ALL OF THE ABOVE
The composition of a gaseous mixture is measured by the pressure of each gas
c. Dalton’s Law
You know your tires are good, but they look flatter in the winter. Assume the pressure has not changed.
b. Charles’s Law
Equal volumes of gases at the same pressure and temperature contain the same number of molecules. This represents:
a. Avogadro’s number
In applications of Gay-Lussac’s Law, which of the four gas variables are held constant? (choose 2)
a. P
b. V ««<
c. T
d. n ««<
Charles Law would be demonstrated in anesthesia by:
a. The ETT/LMA cuff size increasing in volume as temperature increases when inserted into patient
Avogadro’s Number Describes:
c. Volume to mole relationship
Relative humidity is the measure of the saturation of water in air
True
Graham’s Law of Effusion describes:
a. Effusion as the movement of gas through a pinhole
b. The rate of effusion is inversely proportional to the square root of molecular weight
c. The rate of effusion is directly proportional to the square root of the molecular weight
d. A & B «««<
e. A & C
Fick’s Law of diffusion for gases explains:
a. concentration effect
b. second gas effect
c. diffusion hypoxia
d. Why N2O leads to increase in volume of increase in pressure in gas spaces in the body
e. ALL OF THE ABOVE
What are the final products when CO2 reacts with soda lime?
d. Heat, H2O and carbonate
Carbon dioxide diffuses _______times faster than oxygen across the alveolar and capillary membranes
d. 20
Diffusion rate of a gas is directly proportional to:
a. Partial pressure gradient
b. Membrane area
c. Solubility of gas in membrane
d. ALL OF THE ABOVE
The process by which the fetus receives O2 and drugs is via
a. simple diffusion across a membrane
Effusion, the movement of a gas through a small opening, and diffusion, the movement of a substance high to low are substantially the same process.
TRUE
Henry’s Law states that the amount of a non reacting gas which dissolves in liquid is directly proportional to the partial pressure of the gas, provided the temperature remains constant
TRUE
Which of the following should be done if the soda lime becomes exhausted during a case?
b. increase FGF rate
one mole is equal to ?
c. 22.4 L
according to the meyer overton rule, agents with decreased lipid solubility have greater potency.
FALSE
How many liters of oxygen does a full E size tank hold with a pressure of 2200 PSI?
d. 660 liters
How long does it take to empty a full E size tank of Oxygen with a pressure of 2200 PSI and a flow rate of 5 l/min ?
a. 132 min
