Chison Q9 - Page 122

Q9 Digital Color Doppler Ultrasound System
116
PV Max PG
Maximum pressure gradient
[mmHg]
Refer to "
Velocity
Measurement”
PV Diam
Pulmonary artery diameter
[mm]
Refer to "Distance Measurement in B
mode”.
HR
Hea
rt rate [bpm]
Refer to "Heart Rate Measurement
(HR)”
RV ET
Ejection time [ms]
Refer to "Time Measurement (Time)”
RV AcT
Acceleration time [ms]
Refer to "Time Measurement (Time)”
RV PEP
Pre
-
ejection period [ms]
Refer to "Time Measurement (Time)”
Note:
[PV Diam] can only be performed in 2D mode
<<Calculation items>>
<<Measurement points>>
1) Measure [PV Vel]
2) Measure [PVV Trace]
3) Measure [ET],[ACT], and [PEP]
Calc. item name
Description [Unit]
Calc. formula
SV
Stroke volume [mL]
0.785 x (PV Diam)
2
* abs|VTI|
CO
Cardiac output [L/min]
SV
x
HR / 1000
RV AcT/ET
Ratio of AcT
to ET
RV ACT / RV ET
RV STI
Systolic time interval
RV REP / RV ET