Harvard Inspira Advanced Safety Ventilator User`s Manual

25

Operation: Respiration Profiles

Entering I:E Ratio

• The I:E ratio is the ratio of the time needed for inhalation compared to time needed for exhalation.The volume of the inhalation breath is always the same as the volume of the exhalation breath.

• There are no predetermined safe range values for I:E ratios.

• The default I:E ratio is 50%

To enter a different I:E ratio press the [SET] key followed by the [I:E RATIO] key. The display should now read “Enter % Inspiration, (20%-80%)”. Use the numeric keypad to enter the whole number percentage of inspiration (which must be between 20 and 80). The percent of expiration is determined from the value for inspiration. (Note: Due to electromechanical system limitations, Inspira might not accept some I:E Ratio values for certain respiration profiles. If a desired I:E ratio is not accepted when using the small cylinder, try switching to the larger cylinder. This may allow acceptance of the desired ratio.)

Step Key Display

Publication 5404-001-REV-C