User guide

Chapter 4: Measurements and Calculations 65
Measurements
a Position the caliper at the beginning of the
boundary and press the
SELECT key.
b Using the touchpad, mark points by moving
the caliper to the next desired point and
pressing the
SELECT key.
To make a correction, select Undo on-screen
or press the
BACKSPACE key to delete the last
segment.
c Press the
SET key to complete the trace line.
d If necessary, adjust or edit the measurement.
See “IMT tool controls” on page 64.
e Save the calculation. (See “To save a
calculation” on page 47.)
OB calculations
EFW is calculated only after appropriate
measurements are completed. If any one of these
parameters results in an EDD greater than what the
OB calculation tables provide, the EFW is not
displayed.
If you change the calculation author during the
exam, the common measurements are retained.
The following table shows the system-defined
measurements available for OB calculations by
author. For definition of the acronyms, see
“Glossary” on page 167. To select authors, see
“OB Calculations setup” on page 20.
See also “OB Custom Measurements setup” on
page 21 and “OB Custom Tables setup” on
page 21.
WARNING:
Make sure that you have selected
the OB exam type and the OB
author for the OB calculation table
you intend to use. See “Results
from System-Defined OB
Measurements and Table
Authors” on page 66.
WARNING:
To avoid incorrect obstetrics
calculations, verify with a local
clock and calendar that the
system’s date and time settings are
correct before each use of the
system. The system does not
automatically adjust for daylight
savings time changes.
WARNING:
To avoid misdiagnosis or harming
the patient outcome, start a new
patient information form before
starting a new patient exam and
performing calculations. Starting a
new patient information form clears
the previous patient’s data. The
previous patient’s data will be
combined with the current patient
if the form is not first cleared. See
“To create a new patient
information form” on page 36.
WARNING:
Prior to use, verify that OB custom
table data entries are correct. The
system does not confirm the
accuracy of the custom table data
entered by the user.
Transducer Exam Type
C60x OB
ICTx OB
P21x OB