<Tr> <Td_colspan="2"> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Tidal volume (symbol VT or TV) is the lung volume representing the normal volume of air displaced between normal inhalation and exhalation when extra effort is not applied . In a healthy, young human adult, tidal volume is approximately 500 mL per inspiration or 7 mL / kg of body mass . </P> <P> Tidal volume plays a significant role during mechanical ventilation to ensure adequate ventilation without causing trauma to the lungs . Tidal volume is measured in milliliters and ventilation volumes are estimated based on a patient's ideal body mass . Measurement of tidal volume can be affected (usually overestimated) by leaks in the breathing circuit or the introduction of additional gas, for example during the introduction of nebulized drugs . </P>

The approximate value for a normal resting tidal volume is
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