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PG mean = sum(4v
)/N
where:
v =peak velocity at interval n
N = the number of intervals in the Riemann sum.
Pressure Half Time (PHT) in msec
Oh, J.K., J.B. Seward, A.J. Tajik. The Echo Manual. 3rd ed., Philadelphia: Lippincott, Williams, and Wilkins,
(2007), 73-74.
PHT = DT * 0.29
where:
DT = deceleration time
Regurgitant Fraction (RF) in percent
Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition, Boston: Philadelphia: Lippincott Williams
and Wilkins, (2007), 215-217.
RF = RV/ MV SV
where:
RV = Regurgitant Volume
MV SV = Mitral Stroke Volume (Mitral CSA * Mitral VTI)
Mitral CSA = cross-sectional area calculated using Annulas Diameter
Regurgitant Volume (RV) in cc
Oh, J.K., J.B. Seward, and A.J. Tajik. The Echo Manual. 3rd Edition, Boston: Philadelphia: Lippincott Williams
and Wilkins, (2007), 215-217.
RV = ERO * MR VTI/100
Cleaning and disinfecting
This section updates the instructions for cleaning and disinfecting the ultrasound system and transducers.
Use the FUJIFILM SonoSite recommendations when cleaning or disinfecting your ultrasound system and
transducer. Use the cleaning recommendations in the peripheral manufacturer's instructions when cleaning
or disinfecting your peripherals.
Measurement publications and terminology
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