FujiFilm SonoSite SII, Дополнение к руководству пользователя

Страница: 39 / 476

En
glish
De
utsch
Español
Fr
a
n
ça
is
It
a
lia
n
o
Po
rt
u
g
u
ê
s
Measurement references 37
English
De
ut
sch
Español
Fr
a
n
ç
a
is
Ita
lia
no
P
o
rtuguês
Nederlands
IVC Percentage Collapse
Lyon, M., N. Verma. “Ultrasound guided volume assessment using inferior vena cava diameter.” The Open
Emergency Medicine Journal. 2010, 3: p.22-24.
(IVCd exp – IVCd insp)/IVCd exp x 100
where: expiration (exp) = maximum diameter (Max D)
inspiration (insp) = minimum diameter (Min D)
LV Ejection Fraction
Schiller, N.B., Shah, P.M., Crawford, M., et al. “Recommendations for Quantification of the Left Ventricle by
Two-Dimensional Echocardiography.”
Journal of American Society of Echocardiography
.
September-
October 1989, 2: p.364.
EF =((End Diastolic Volume - End Systolic Volume)/End Diastolic Volume) * 100 (%).
Mean Velocity (Vmean) in cm/s
Vmean = mean velocity
Mitral Valve Area (MVA) in cm
2
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual . 3rd ed., Philadelphia: Lippincott, Williams, and Wilkins,
(2007), p.73-74.
MVA = 220/PHT
where: PHT = pressure half time
220 is an empirical derived constant and may not accurately predict mitral valve area in mitral prosthetic
heart valves. The mitral valve area continuity equation may be utilized in mitral prosthetic heart valves to
predict effective orifice area.
MV Flow Rate in cc/sec
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual . 3rd ed., Philadelphia: Lippincott, Williams, and Wilkins,
(2007), p.73-76, p.210.
Flow = PISA * Va
where: PISA = Proximal Isovelocity SurfaceArea
Va = aliasing Velocity