FujiFilm SonoSite SII, Дополнение к руководству пользователя

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Measurement references 41
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Tricuspid Valve Area (TVA)
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual . 3rd ed., Philadelphia: Lippincott, Williams, and Wilkins,
(2007), p.73-74.
TVA = 220 / PHT
Velocity Time Integral (VTI) in cm
Reynolds, Terry. The Echocardiographer’s Pocket Reference . 2nd ed., School of Cardiac Ultrasound, Arizona
Heart Institute, (2000), p.383.
VTI = sum of abs (velocities [n])
where: Auto Trace – distance (cm) blood travels with each ejection period. Velocities are absolute
values.
General references
+/x or S/D Ratio
+/x = (Velocity A/Velocity B)
where: A = velocity
B = velocity cursor x
Acceleration Index (AI)
Zwiebel, W.J. Introduction to Vascular Ultrasonography , 4th ed., W.B. Saunders Company, (2000), p.52.
ACC = abs (delta velocity/delta time)
Elapsed Time (ET)
ET = time between velocity cursors in milliseconds
Pressure Gradient (PGr) in mmHG
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual
.
2nd ed., Lippincott, Williams, and Wilkins, (1999), p.64.
PG = 4 * (Velocity)
2
(velocity units must be meters/second)
Peak E Pressure Gradient (E PG)
E PG = 4 * PE
2
Peak A Pressure Gradient (A PG)
A PG = 4 * PA
2