GE Logiq P5 User Manual

							Generic Measurements
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 Max Pressure Gradient (PG)
To measure Max PG:
1.  From the Doppler Generic Touch Panel, select Max PG. 
The system displays an active caliper with vertical and 
horizontal dotted lines.
2.  To position the caliper at the first pressure gradient point, 
move the Trackball.
3.  To fix the measure point, press Set.
The system displays a second active caliper.
4.  To position the second caliper at second pressure gradient 
point, move the Trackball.
5.  To complete the measurement, press Set.
The system displays the two V
max measurements and the 
Max PG in the Results Window. 
Set the first caliper on V
max and the second on Vd. 
Automatic
Calculation of
Max PGWhen you select Max PG, if you previously measured and 
calculated velocity in Doppler Mode, the system automatically 
calculates Max PG from the V
max and Vd measurements taken 
for velocity.  
						

							General Measurements and Calculations
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Mean Pressure Gradient (PG)
To measure Mean PG (Mean Pressure Gradient):
1.  From the Doppler Generic Touch Panel, select Max PG. 
The system displays a trace caliper.
2.  To position the caliper at the beginning of the waveform 
(V
max), move the Trackball.
3.  To fix the start point, press Set.
The system displays a second active caliper.
4.  To trace the waveform from V
max to Vd move the Trackball.
5.  To complete the measurement, press Set.
The system displays TAMAX and Mean PG in the Results 
Window. 
If Trace Auto is selected, the waveform is automatically traced 
after the second caliper is fixed.
If Trace Auto is not selected, manually trace the desired portion 
of the waveform.
Automatic
Calculation of
Mean PGIf velocity was previously measured and calculated in Doppler 
Mode, Mean PG is calculated from the velocity value when 
Mean PG is first selected in the Touch Panel.
The waveform is automatically traced. Velocity and Mean PG 
are also displayed on the screen.
If Trace Auto is off, the Auto Trace function is off and traces can 
be performed manually. 
						

							Generic Measurements
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Heart Rate
To measure heart rate, See ‘Heart Rate’ for more information. or 
select any of the following measurements.
SV Diam  (Stroke
Volume Diameter)To measure SV Diam:
1.  From the Doppler Generic Touch Panel, select the SV 
folder.
2.  Select SV Diam.
SV TAMEAN
(Stroke Volume
TAMEAN)To measure SV TAMEAN:
1.  From the Doppler Generic Touch Panel, select the SV 
folder.
2.  Select SV TAMEAN.
CO HR (Cardiac
Output Heart Rate)To measure CO HR:
1.  From the Doppler Generic Touch Panel, select the SV 
folder.
2. Select CO HR. 
						

							General Measurements and Calculations
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Helpful hints
HINTSThe following hints can help when making a measurement
• If you press P1 while making a measurement, the system 
completes the measurement and sends the data to the 
worksheet (unless the VCR is assigned to the P1 key).
•  Prior to making measurements, use the Cine function, if 
necessary, to display the best image.
•  As you take measurements, each measurement is given a 
sequential number on the display and in the Results 
Window. Nine measurements can be displayed in the 
Results Window at one time.
•  Once the Results Window has nine measurements, if you 
make any further measurements, the system erases the 
top (first) measurement and adds the new measurement 
last (first in, first out).
•  While you are taking a measurement, the value in the 
Results Window updates until you complete the 
measurement. 
						

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Chapter 8
Abdomen and Small Parts
Describes how to perform Abdomen and Small Parts 
measurements and calculations. 
						

							Abdomen and Small Parts
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Abdomen/Small Parts Exam
Preparation
Introduction
Measurements and calculations derived from ultrasound images 
are intended to supplement other clinical procedures available 
to the attending physician. The accuracy of measurements is not 
only determined by the system accuracy, but also by use of 
proper medical protocols by the user. When appropriate, be sure 
to note any protocols associated with a particular measurement 
or calculation. Formulas and databases used within the system 
software that are associated with specific investigators are so 
noted. Be sure to refer to the original article describing the 
investigators recommended clinical procedures.
Calculation formulas are available in the Advanced Reference 
Manual.
General Guidelines
New Patient information must be entered before beginning an 
exam. See ‘Beginning a New Patient’ for more information.
Any measurement can be repeated by selecting that 
measurement again from the Touch Panel Menu. 
						

							Abdomen
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Abdomen
Introduction
Abdominal measurements offer a few different types of 
measurement studies:
 Figure 8-1. Abdomen Exam Category Touch Panel
•  Generic–Common to all applications. See ‘Generic 
Measurements’ for more information.
• Abdomen
• Renal Artery
1. Press Exam Calcs.
The Vascular exam category allows you to choose from the 
displayed studies.
2.  To select another study, press the desired study folder. 
						

							Abdomen and Small Parts
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B-Mode Measurements
The following measurements are located in the Exam Calcs tab 
for the Abdomen exam category. Some measurements are only 
available in certain Exam Calcs. Those specific measurements 
(splenic length, splenic width, splenic height, Aorta Diameter, 
and Renal Length) are listed on the following pages.
In B-Mode, the Generic Exam Calcs for Abdomen includes the 
following measurements:
• % Stenosis
• Volume
• Angle
• A/B Ratio
 Figure 8-2. Generic Calculations B-Mode Touch Panel
See ‘B-Mode Measurements’ for more information. 
						

							Abdomen
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Splenic length, width, and height
These measurements are found in the Abdomen Exam Calcs 
tab. Each of these is a standard distance measurement. Length 
is typically measured in the sagittal plane. Width and height are 
measured in the axial plane.
To measure splenic length, width, or height:
1.  Scan the patient in the appropriate scan plane. 
2. Select the Splenic folder, then select Splenic L, Splenic W, 
or Splenic H. 
An active caliper displays.
3.  Perform a standard distance measurement: 
a.  To position the active caliper at the start point, move the 
Trackball.
b.  To fix the start point, press Set.
The system fixes the first caliper and displays a second 
active caliper.
c.  To position the second active caliper at the end point, 
move the Trackball.
A dotted line connects the measurement points.
d.  To complete the measurement, press Set.
The system displays the distance value in the Results 
Window.
4.  To make the second and third distance measurement, 
repeat steps 2–3. 
After you complete the third distance measurement, the 
system displays the splenic volume in the Results Window. 
						

							Abdomen and Small Parts
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Aorta Diameter
This measurement is found in the Abdomen Exam Calcs tab. To 
measure aorta diameter, make one distance measurement:
1. Select Aorta Diameter; an active caliper displays.
2.  To position the active caliper at the start point, move the 
Trackball.
3.  To fix the start point, press Set.
The system fixes the first caliper and displays a second 
active caliper.
4.  To position the second active caliper at the end point, move 
the Trackball.
A dotted line connects the measurement points.
5.  To complete the measurement, press Set.
The system displays the aorta diameter in the Results 
Window.
Renal Length
This measurement is found in the Renal Artery Exam Calcs tab. 
To measure renal length, make one distance measurement:
1. Select Renal Length; an active caliper displays.
2.  To position the active caliper at the start point, move the 
Trackball.
3.  To fix the start point, press Set.
The system fixes the first caliper and displays a second 
active caliper.
4.  To position the second active caliper at the end point, move 
the Trackball.
A dotted line connects the measurement points.
5.  To complete the measurement, press Set.
The system displays the renal length in the Results Window.