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Resources: Glossary

The Glossary contains terms commonly associated with ventilators, the community, and respiratory physiology. Click on a hyperlinked letter to view the entries that begin with that letter, then scroll down in the window to find the word you are looking for.

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If you don't see a term you feel should be listed, please send it to us for review!

Tachypnea Breathing faster than normal.
TC Tube Compensation (See Automatic Tube Compensation)
Time Constant The time in which an exponential process is 63% complete. For a pneumatic system characterized by a single compliance, C, and a single resistance, R, the time constant is the product RxC.
Triangular Wave A wave profile that rises in a straight line from its baseline to a peak value from which it drops back to the baseline.
Trigger Flow The change in breathing circuit flow required to initiate the ventilator's inspiratory phase.
Trigger Pressure The change in breathing circuit pressure required to initiate the ventilator's inspiratory phase.
Trigger Response Time (See Inspiratory Triggering Response Time.)
Trigger Volume (See Inspiratory Triggering Volume.)
Tube Compensation (See Automatic Tube Compensation)
TV Tidal Volume (Exhaled Tidal Volume) - The change of volume of the lungs (estimated by the gas volume entering or leaving the lungs) during either the inspiratory or expiratory phase of a breath.
24x7 Usually applied to the availability of service for equipment: 24 hours a day, seven days a week.
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