If you haven't already read through the proposed changes for this data type, please take a look at:
Here is a draft version of the updated data type:
Peak Flow Measurement type
The date and time of the measurement.
The peak expiratory flow, measured in liters/second.
The highest PEF measurement, measured in liters/second.
The forced expiratory volume in one second, measured in liters.
The forced expiratory volume in six seconds, measured in liters.
Additional information about the measurement.
Examples: Incomplete measurement.
Note: fev1 has been updated from type flow-value to type volume-value to accurately describe this data element.
The volume measurement in liters (L).
The display value for the volume measurement.
The display value contains the volume measurement value stored in the user's preference of units.