Final Exam Study Guide Flashcards
What are the limitations of pulse oximetry?
I. Deeply pigmented skin
II. Low pulsatile blood flow
III. Intravascular dyes
IV. Properly placed probe
I, II, and III
I. Deeply pigmented skin
II. Low pulsatile blood flow
III. Intravascular dyes
What is normal body temperature according to the Celsius scale?
37 degrees
In regards to the perfusion index, which of the following is not correct?
It is an invasive way of measuring peripheral perfusion.
Which of the following is not considered a vital sign?
Breath sounds
Surface tension occurs due to the the force acting on the boundary surface between two regions such as a liquid. This occurs due to the bonding of?
Hydrogen atoms
The numeric display of CO2 measurements taken from the airway is known as?
Capnometry
In regards to oxygenated hemoglobin, which are true?
I. It is called oxyhemoglobin.
II. Oxygenated hemoglobin absorbs more of the infrared light (940 nm).
III. Oxygenated hemoglobin absorbs more of the red light (660 nm).
IV. It is also called deoxyhemoglobin.
I, and II
I. It is called oxyhemoglobin.
II. Oxygenated hemoglobin absorbs more of the infrared light (940 nm).
When inspecting a capnography waveform from a patient with airway obstruction, which abnormalities would be observed in the slope?
It would be increased
What is the fraction of inspired oxygen (FiO2) in the atmosphere?
21%
Which of the following substances reduces surface tension?
Surfactant
T or F: Carboxyhemoglobin (HbCO) has the same non-infrared light absorption as HbO2 and overestimates SpO2.
True
Which change in state requires the addition of energy?
Endothermic
Which are true regarding transcutaneous blood gas monitoring?
I. Electrochemically measures O2 and CO2 at the skins surface
II. Warms the skin to induce hyperemia
III. The electrodes operate on the same principles as blood gas electrodes
IV. Used to monitor neonates, small children, and patients with peripheral vascular disease
All of the above
You observe pulsus paradoxus on a pulse oximetry plethysmograph waveform. What does this indicate?
Severity of air trapping
You go on vacation to Leadville, Colorado. Leadville is located 10,152 feet above sea level. You begin to exhibit signs of elevation sickness. What is the cause of your elevation sickness?
The atmospheric pressure is lower than at sea level.
How many mg/L of water is contained in fully saturated gas at body temperature?
44 mg/L
T or F: Pulse oximeter measurements have an accuracy of +4% or -4% at an SpO2 greater than 80%.
True
What occurs whenever inspired gas is not fully saturated at body temperature. The body is then required to add water to the inspired gases to achieve full saturation.
Humidity deficit
Which gas law defines a relationship between pressure, volume, temperature, and the number of molecules of gas?
Ideal gas law
The velocity of diffusion is inversely proportional to the square root of the molecular weight of a substance. This describes which gas law?
Graham’s law
Which are airway sampling systems used in capnometry?
I. Upstream sensors
II. Sidestream sensors
III. Mainstream sensors
IV. Downstream sensors
II, and III
II. Sidestream sensors
III. Mainstream sensors
The total water content in a gas, such as air, compared with the capacity for water content at that temperature is defined as?
Relative humidity
Which are properties of a liquid? (You may choose more than one)
A liquid has no fixed shape
A liquid has a fixed volume
A liquid has no fixed volume
A liquid is not rigid
A liquid has no fixed shape
A liquid has a fixed volume
A liquid is not rigid
Which of the following is an example of a molecule?
H2O (water)