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51 Cards in this Set
- Front
- Back
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What is humidity?
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Water in a gaseous state or
vapor. |
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What are the goals of humidity therapy?
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Humidify dry therapeautic gases.
Provide 100% humidity for patients with artificial airway. Compensate for humidity deficit |
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What is absolute humidity?
What is formula to calculate? |
Actual amount of water in a given volume of gas at a specific temperature.
AH=RH x capacity |
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What is capacity?
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Total amount of water in a given volume of gas at a specific temperature.
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What is partial pressure-water vapor pressure?
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The pressure exerted by water vapor molecules in a given volume of gas.
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What is relative humidity?
What is formula to calculate? |
Measurement of amount of moisture present in the air.
RH= AH÷Capacity x 100 |
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What is Body humidity?
What is formula to calculate? |
Water saturation condition of gas in the lungs.
BH=AH÷44mg/L x 100 |
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What is the water vapor pressure at 37°C and 100% saturation?
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47mmHg
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What is the total amount of water required to saturate a gas at body temperature?
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44 mg/L
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What is the capacity of water vapor at 37°C
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44mg/L
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What does humidity deficit mean?
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Moisture deficit between the inspired air and the needs of the body.
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Calculate Humidity deficit. (2 ways)
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HD=44mg/L - AH
%DH=HD÷44mg/L x 100 |
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What is a humidifier and how does it operate?
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A device that produces water in a gaseous state through the process of evaporation.
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Efficiency of humidifiers is dependent on what 3 factors?
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Time of contact between gas & water.
Surface area involved in gas & water contact. Temperature of gas & water. |
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What type of humidifier is commonly used with low flow oxygen delivery devices?
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Bubble humidifer
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Is a cascade humidifier heated?
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Yes.
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Does a cascade humidifier supply 100% body humidity?
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Yes.
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What would cause the whistling noise to come from a bubbler humidifier?
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Kinked or obstructed tubing.
Flow set too high. |
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What is the purpose of the whistling sound from the humidifier?
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Acts as an alarm.
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Condensation that occurs in the tubings of a heated humidifier should be drained back into the humidifier or water reservoir? Why or why not.
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No. Bacteria cross contamination.
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How does a heated moisture exchanger(HME)artificial nose work?
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It traps exhaled gas at body temperature. As the next air is inspired it is heated by exchanger.
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When would you want to switch a patient from using a HME to a conventional humidifier?
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If a patients secretions begin to thicken.
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What is aerosol?
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Water in a particulate form or mist.
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What are other names for a large volume nebulizer?
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Pneumatic, Air entrainment, Jet.
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What type of microorganism can grow in the water of a nebulizer? What problem does this cause?
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Pseudomonas. Contamination.
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When the dilution control on a large volume nebulizer is changed from 35% to 60% what happens to:
a) air entainment b) density of the mist c) output of the mist |
a) decreases
b) increases c) decreases |
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When the dilution control on a large volume nebulizer is changed from 60% to 35% what happens to:
a) air entainment b) density of the mist c) output of the mist |
a) increases
b) decreases c) increases |
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List the FiO2, the liter flow range and if high or low flow on Aerosol Mask.
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21-100%
8-15 LPM HF |
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List the FiO2, the liter flow range and if high or low flow on Face Tent.
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21-40%
8-15 LPM HF |
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List the FiO2, the liter flow range and if high or low flow on T-Tube
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21-100%
8-15% HF |
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List the FiO2, the liter flow range and if high or low flow on Tracheostomy Collar.
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21-100%
8-15LPM HF |
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List the FiO2, the liter flow range and if high or low flow on Oxyhood.
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21-100%
7-15 LPM HF |
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List the FiO2, the liter flow range and if high or low flow on O2 Tent.
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21-50%
12 and up LPM HF |
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What types of patients would you use a face tent for?
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Burn victims, Facial trauma,
Irritated by regular masks. |
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What types of patients would you use a T-Tube for?
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Pts that have had a Tracheostomy or have been intubated.
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What type of patients would you use a Tracheostomy collar for?
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Pt that had Tracheostomy proceedure.
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What are the types of aerosol enclosure devices?
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Incubator, Hood, Tent
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What item should never be allowed in an oxygen tent? Explain why.
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Anything that can vause a spark or combustion. Oxygen acts as an accelerant to fire.
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If there is a restriction or obstruction in the tubing of an aerosol set up explain what happens to the FiO2.
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Increases
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You should drain condensation that accumulates in the aerosol tubing back into the nebulizer jar?
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No. Bacteria contamination.
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After setting up a patient on an aerosol delivery device you should see mist coming out of the device at all times?
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Yes.
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If the mist disappears on inspiration from an aerosol delivery device explain what happens and how do you correct it.
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FiO2 needs are not being met.
Room air is being entrained. Join 2 units in tandem or tun up flow |
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What are the goals of a large volume nebulizer?
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Provide continuous Oxygen
Provide continuous aerosol. Compensate for humidity deficit. Thin mucous secretions. |
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Can a large volume nebulizer be heated and cooled?
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Yes
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What are the hazards of a large volume nebulizer?
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Fluid overload
Overheating of inspired gas Cross contamination Bronchospasms Secretions swell and cause obstruction. |
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What types of patients should use cool aerosol and humidity?
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Patients with croup, stridor, upper airway intubation.
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What types of patients should use heated aerosol and humidity?
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Patients with bypassed upper airway, viscous secretions, hypothermia, and neonates.
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What 3 things does an oxygen analyzer measure?
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FiO2
O2 concentration Percent of O2 being delivered. |
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Accuracy of analyzers is affected by what factors?
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Water on the sensor
High system pressures Changes in altitude |
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If you cannot calibrate a galvanic fuel cell what should be done?
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Change the fuel cell.
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What are the 3 ways to measure humidity?
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Absolute
Relative Partial Pressure |
