Res 131
Download
1 / 17

res 131 - PowerPoint PPT Presentation


  • 174 Views
  • Uploaded on

RES 131. Pulmonary Functions. Good Start of Test. Start of test must be quick and forceful No excessive hesitation Best evaluated using the Flow-Volume tracing No excessive back extrapolated volume. Good Start of Test. No Coughing. Especially during the first 1 second of the maneuver

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'res 131' - jacob


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Res 131 l.jpg

RES 131

Pulmonary Functions


Good start of test l.jpg
Good Start of Test

  • Start of test must be quick and forceful

  • No excessive hesitation

  • Best evaluated using the Flow-Volume tracing

  • No excessive back extrapolated volume



No coughing l.jpg
No Coughing

  • Especially during the first 1 second of the maneuver

  • Best if no coughing present during maneuver, however:

    • Some patients cough near the end of each test, if present then document



No variable flow l.jpg
No Variable Flow

Flow rate should be maximal and consistent throughout testing

Volume-Time and Flow-Volume tracings should be smooth



No early termination of effort l.jpg
No Early Termination of Effort

  • Best if maneuver lasts at least six (6) seconds

  • Less than six seconds acceptable if a plateau of al least one (1) second is present

  • If patient is unable to meet the above criteria, document in comment section



Reproducibility l.jpg
Reproducibility

  • Spirometry induced bronchospasm

    • Each effort gets worse

    • Patient eventually reaches a plateau, however they may be too short of breath to continue.

    • Which effort to report?

    • Best effort unless pre and post bronchodilator study, then report the worst effort.



Temperature correction l.jpg
Temperature Correction

  • Charles law states that the volume occupied by a given quantity of gas is directly related to temperature

  • Body temperature gas is exhaled into a room temperature spirometer, therefore the volume decreases

  • Temperature correction allows us to know the volume of gas as it was in the body


Temperature correction13 l.jpg
Temperature Correction

  • Charles law states that the volume occupied by a given quantity of gas is directly related to temperature

  • Body temperature gas is exhaled into a room temperature spirometer, therefore the volume decreases

  • Temperature correction allows us to know the volume of gas as it was in the body


Temperature correction14 l.jpg
Temperature Correction

  • The volume measured by the spirometer is reflected at ATPS (atmospheric temperature, pressure, saturated)

  • It must be corrected to BTPS (body temperature, pressure, saturated)


Temperature correction15 l.jpg
Temperature Correction

  • Formula for calculation of temperature correction factor


Temperature correction16 l.jpg
Temperature Correction

  • Conversion factor is multiplied by the ATPS volume to find the BTPS volume.


Back extrapolation l.jpg
Back Extrapolation

  • Extrapolated Volume may not exceed 5% of the FVC


ad