Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chapter 38
Humidity and Bland Aerosol Therapy
| Question | Answer |
|---|---|
| Passive humidifiers | Heat and moisture exchangers |
| What is the function of the relief valve on a bubble humidifier? | To warn off flow path obstruction and prevent bursting of the humidifier bottle |
| What is the point called in the respiratory tract where inspired gas reaches body temp, ambient pressure, saturated(BTPS) conditions? | Isothermic saturation boundary(ISB) -it is 5 cm below the carina |
| What is the primary goal of humidity therapy? | Maintain normal physiologic conditions in the lower airways |
| What could the inhalation of dry gases cause? | -High viscosity -Impair mucociliary -High irritability |
| What conditions should be maintained when delivering medical gases directly into the trachea through an endotracheal tube or tracheostomy tube? | -Temp range of 32-35 -100% relative humidity -36-40 mg/l absolute humidity |
| What are the clinical indications for delivering cool humidified gas? | Used to treat upper airway inflammation, croup, epiglottis, and postextubation edema. |
| What device adds molecular water to gas? | A humidifier |
| What factors affect a humidifier’s performance? | -temp -surface area -time of contact -thermal mass |
| What is the most important factor determining a humidifier’s performance? | Temperature |
| The greater the temp of the gas, the more____ it can hold. | Water vapor(increased capacity) |
| What is the simplest way to increase the humidity output of a humidifier? | Heating the humidifier |
| What are the different types of humidifiers that are used in clinical practice? | -Active humidifiers -Passive humidifiers |
| Active humidifiers | -bubble humidifiers -Passover humidifiers -nebulizers or blame aerosol -vaporizers |
| Some bubble humidifiers produce ____ at high flow rates | Aerosol particles( can transmit bacteria from the humidifier to the pt) |
| Different types of Passover humidifiers | -simple reservoir -wick type -membrane type |
| What type of humidifier has a design that increases surface area and enhances evaporation by incorporating an absorbent material partially submerged in a water reservoir that is surrounded by a heating element | Wick type |
| What are advantages of Passover humidifiers? | -maintains saturation at high flow rates -add little or no flow resistance to spontaneous breathing circuits -do not generate any aerosols that can be spread infection |
| What type of humidifier “traps” the patient’s body heat and expire water vapor to raise the humidity of inspired gas | Heat & moisture exchanger (HME) |
| What are heat and moisture exchangers (HMEs) are mainly used for | Add humidity or heat or both to inspired gas by chemical or electrical means |
| Different types of HMEs | -simple condenser humidifier -hygroscopic condenser humidifier -hydrophobic condenser humidifier |
| Features of an ideal heat and moisture exchanger | -High resistance -Minimal deadspace -70% higher efficiency -minimal flow resistance |
| What kind of patients would use a heater humidifier? | -patients with bypassed upper airways -patients with long term noninvasive mechanical ventilatory support |
Created by:
Katieobannon