Pulmonary Volume Analysis Module

The Pulmonary Volume Analysis Module (PVO) analyzes pulmonary volume signals obtained from the D70-PCTR respiratory impendence implant.  It also calculates, on a breath-to-breath basis, values for the respiratory cycle using volume based attributes.  The graph above represents a typical pulmonary flow and volume signal.  The validation marks provide a visual, real-time verification of the accuracy of the system.

The list below describes the parameters calculated by the analysis module either in real-time or during subsequent analysis.

Model PNM-PVO100W

Name		Definition
Num		The number of the respiratory cycle.
PIF		Peak Inspiratory Flow, Peak Expiratory Flow.
TV		Tidal Volume is the volume at start of expiration minus the volume at the start of inspiration.
MV		Minute Volume is the product of the tidal volume and the number of breaths-per-minute.
BPM		The number of breaths-per-minute.
IT		The Inspiratory Time is the time in milliseconds from the start of inspiration  to the start of expiration.
ET		The Expiratory Time is the time in milliseconds from the start of expiration to the start of apnea mark if present or next breaths start of inspiration mark if no apnea mark is present. The time is in milliseconds.
TT		The Total Time is the time in milliseconds from one breath to the next breath.
AT		Apnea Time.
Penh		Enhanced Pause.
RT		Relaxation Time is time in milliseconds from the start of expiration to a user defined percent volume signal drop.
TVe		The volume at start of expiration for the current cycle minus the volume at the point prior to the start of inspiration of the next breath.
IF50		Inspiratory Flow at 50% Tidal Volume.
EF50		Expiratory Flow at 50% Tidal Volume.
Avol		Accumulated Volume is the summed total of the Tidal Volume (TV) from a reset point forward and is reported in milliliters..
VolBa		Volume Baseline is the volume at start of inspiration.
VFluc		Volume Fluctuation.
FFluc		Flow Fluctuation.
TVm		Median Tidal Volume.
MVm		Median Tidal Volume expired.
TVt		The Tidal Volume Throughout is the total volume of air that was inspired at any time during a breath and is always reported in milliliters
TVte		The Tidal Volume Expired Throughout is the total volume of air that was expired at any time during a breath and is always reported in milliliters.
PZr		If a pneumotach is available and defined within the calibration dialog this derived data point will output the ratio of pneumotach volume divided by volume signal.