User's Manual

Table Of Contents
Chapter 7: References 145
References
Right Ventricular Systolic Pressure (RVSP) in
mmHg
Reynolds,Terry.TheEchocardiographer’sPocket
Reference.SchoolofCardiacUltrasound,Arizona
HeartInstitute,(1993),152.
RVSP=4*(VmaxTR)
2
+RAP
where: RAP=RightAtrialPressure
S/D
Reynolds,Terry.TheEchocardiographer’sPocket
Reference.2nded.,SchoolofCardiacUltrasound,
ArizonaHeartInstitute,(2000),217.
Svelocity/Dvelocity
where: Svelocity=PulmonaryveinSwave
Dvelocity=PulmonaryveinDwave
Stroke Index (SI) in cc/m
2
Mosby’sMedical,Nursing,&AlliedHealth
Dictionary,4thed.,(1994),1492.
SI=SV/BSA
where: SV=StrokeVolume
BSA=BodySurfaceArea
Stroke Volume (SV) Doppler in ml
Oh,J.K.,J.B.Seward,A.J.Tajik.TheEchoManual.
2nded.,Lippincott,Williams,andWilkins,
(1999),40,59,62 .
SV=(CSA*VTI)
where CSA=CrossSectionalAreaofthe
orifice(LVOTarea)
VTI=VelocityTimeIntegralofthe
aorticvalve
Tricuspid Valve Area (TVA)
Reynolds,Terry.TheEchocardiographer’sPocket
Reference.2nded.,SchoolofCardiacUltrasound,
ArizonaHeartInstitute,(2000),55,391,452.
TVA=220/PHT
Stroke Volume (SV) 2D and M Mode in ml
Oh,J.K.,J.B.Seward,A.J.Tajik.TheEchoManual.
2nded.,Boston:Little,BrownandCompany,
(1994),44.
SV=(LVEDVLVESV)
where: SV=StrokeVolume
LVEDV=EndDiastolicVolume
LVEDSV=EndSystolicVolume
Velocity Time Integral (VTI) in cm
Reynolds,Terry.TheEchocardiographer’sPocket
Reference.2nded.,SchoolofCardiacUltrasound,
ArizonaHeartInstitute,(2000),383.
VTI=sumofabs(velocities[n])
where: AutoTracedistance(cm)blood
travelswitheachejectionperiod.
Velocitiesareabsolutevalues.
Obstetrical references
Amniotic Fluid Index (AFI)
Jeng,C.J.,etal.“A m n i o t i c FluidIndex
Measurementwiththe Four QuadrantTechnique
DuringPregnancy.”TheJournalofReproductive
Medicine,35:7(July1990),674677.
Average Ultrasound Age (AUA)
ThesystemprovidesanAUAderivedfromthe
componentmeasurementsfromthe
measurementtables.
Estimated Date of Delivery (EDD) by Average
Ultrasound Age (AUA)
Resultsaredisplayedasmonth/day/year.
EDD=systemdate+(280daysAUAindays)
Estimated Date of Delivery (EDD) by Last
Menstrual Period (LMP)
Thedateenteredintothepatientinformationfor
LMPmustprecedethecurrentdate.
Resultsaredisplayedasmonth/day/year.