FujiFilm SonoSite M-Turbo User Manual page 76

c Position the calipers. (See "Working with
calipers" on page 47.)
Save the calculation. (See "To save a
d
calculation" on page 51.)
Measure from aorta (Doppler). See "To
3
calculate Velocity Time Integral (VTI)" on
page 61. From the calculations menu, select
AV and then select VTI.
For information on the automatic trace tool, see
"To trace automatically (Doppler)" on page 50.
To calculate Heart Rate (HR)
Heart Rate is available in all cardiac packages.
The Heart Rate is not calculated using the ECG
trace.
Saving the heart rate to the patient report
overwrites any heart rate entered on the patient
information form.
1 On a frozen Doppler spectral trace, press the
key.
CALCS
2 From the calculations menu, select HR.
A vertical caliper appears.
3 Using the touchpad, position the first vertical
caliper at the peak of the heartbeat.
4 Press the key.
SELECT
A second vertical caliper appears. The active
caliper is highlighted green.
5 Using the touchpad, position the second
vertical caliper at the peak of the next
heartbeat.
Save the calculation. (See "To save a
6
calculation" on page 51.)
To calculate Cardiac Output (CO) or Cardiac
Index (CI)
The CO and CI calculations require Stroke
Volume and Heart Rate calculations. CI also
requires Body Surface Area (BSA). After the
measurements are saved, the result appears in
the patient report.
64 Exam-based calculations
1 (CI Only) Fill in the Height and Weight fields
on the patient information form. The BSA is
calculated automatically. (See "To create a
new patient information form" on page 40.)
2 Calculate SV. See "To calculate Stroke Volume
(SV) or Stroke Index (SI)" on page 63.
3 Calculate HR. See "To calculate Heart Rate
(HR)" on page 64.
To calculate Cardiac Output automatically
WARNING: To avoid incorrect calculation
results, make sure that the Doppler
signal does not alias.
WARNING: To avoid an incorrect diagnosis:
• Do not use automatic Cardiac
Output calculations as the sole
diagnostic criteria. Use them only
in conjunction with other clinical
information and patient history.
• Do not use automatic Cardiac
Output calculations in neonatal
patients.
To avoid inaccurate velocity
measurements if you use PW
Doppler, make sure that Angle
Correction is set to zero.
The system can maintain the accuracy of
automatic Cardiac Output measurements only if
the flow rate is 1 L/min or greater.
1 Measure from LVOT (2D):
a On a frozen 2D image, press the
b From the calculations menu, select CO, and
then select LVOT D.
c Position the calipers. (See "Working with
calipers" on page 47.)
d Save the calculation. (See "To save a
calculation" on page 51.)
key.
CALCS