Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
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

Fundamentals Unit 7

SPC Fundamentals Unit 7 Exam 3

Atomic Weight of Helium 4.003
Density of He 0.1785 g/L
Airway Resistance (Raw) Driving Press/Flow=resistance of the airways to the flow of gas
Gas factors that effect (Raw) 1. Density-Turbulent flow-in the large upper airways 2. Viscosity-Laminar flow-in the small peripheral airways
Reynolds Number(#) 2rvd/n
Reynolds (#) r is? Airway Radius
Reynolds (#) v is? Velocity
Reynolds (#) d is? Density
Reynolds (#) n is? Viscosity
Therapeutic Application of Reynolds (#) Low density gas will decrease turbulence and WOB Indications: Stridor/Croup/Foreign Body Aspiration/Upper Airway Masses
Density of Air 1.29 g/L
Density of O2 1.43 g/L
80/20 He/Ox 0.43 g/L
70/30 He/Ox 0.55 g/L
Diffusion of He/O2 (Heliox) Heliox mixtures diffuses faster than oxygen or air
Which law has to do with diffusion? Graham's Law- diffusion is inversely proportional to sq. root of GMW
Considerations of using Heliox? 1. Cough less effective 2. O2 flowmeters read low 3. Voice change 4. Deliver vis closed system 5. Aerosols better drug deposition
Heliox Flowmeter Factor 80/20 Flow x 1.8
Heliox Flowmeter Factor 70/30 Flow x 1.6
HbO2 Hemoglobin of O2
Pulse Oximetry Spectrophotometry Photoplethysmography
Spectrophotography Incorporates light absorption to quantify HbO2
Photoplethysmography Incorporates light transmission to differentiate av flow to determine pulse
Pulse Oximetry sends two wave lengths of light? Red & Infrared Red absorbed by deoxyHb Infrared absorbed by oxyHb
Technical Limitation of Pulse Ox All reads high: HbCO/ Black or Blue Nail Polish/ Fluorescent Light/ Dark Skin/
Created by: Langhout1418