SonoSite S-Cath - Page 53

Chapter 4: Measurements and Calculations 43
Measurements
c Usingthetouchpad,tracetheleft
ventricular(LV)cavity.
Tomakeacorrection,press Undo.
d Completethetrace,andthenclick.
e Savethecalculation.(See“Tosavea
calculation”onpage 38.)
To calculate MV or AV area
1 Onafrozen2Dimage,press Calcs.
2 Inthecalculationsmenu,locateArea,and
thenselectMVorAV.
3 Positionthecaliperwhereyouwanttobegin
thetrace,andthenclick.
4 Usingthetouchpad,tracethedesiredarea.
Tomakeacorrection,press Undo.
5 Completethetrace,and
thenpressSet.
6 Savethecalculation.(See“Tosavea
calculation”onpage 38.)
To calculate LV Mass
1 Onafrozen2Dimage,press Calcs.
2 Inthecalculationsmenu,locateLV Mass.
3 DothefollowingforEPIandthenforEndo:
a Selectthemeasurementnamefromthe
calculationsmenu.
b Positionthecaliperwhereyouwantto
beginthetrace,andthenclick.
c Usingthetouchpad,tracethe
desiredarea.
Tomakeacorrection,press Undo.
d Completethetrace,andpressSet.
e Savethecalculation.(See“Tosavea
calculation”onpage 38.).
4 SelectApical fromthecalculationsmenu.
5 Positioning thecalipers,measurethe
ventricularlength.(See“Workingwith
calipers”onpage 33.)
6 Savethecalculation.
To measure peak velocity
Foreachcardiacmeasurement,thesystemsaves
uptofiveindividualmeasurementsand
calculatestheiraverage.Ifyoutakemorethan
fivemeasurements,themostrecentmeasurement
replacesthefifthone.Ifyoudeleteasaved
measurementfromthepatientreport,thenext
measurementtakenreplacesthedeletedonein
the
patientreport.Themostrecentlysaved
measurementappearsatthebottomofthe
calculationsmenu.
1 OnafrozenDopplerspectraltrace,press
Calcs.
2 Fromthecalculationsmenu,selectMV,TV,
TDI,orP. Ve i n .
3 Dothefollowingforeachmeasurementyou
wanttotake:
a Selectthemeasurementname
fromthe
calculationsmenu.
b Positionthecalipers.(See“Workingwith
calipers”onpage 33.)
c Savethecalculation.(See“Tosavea
calculation”onpage 38.)
To calculate Velocity Time Integral (VTI)
Note: Thiscalculationcomputesotherresultsin
additiontoVTI.Seethetable“CardiacCalculations”
onpage 39.
1 OnafrozenDopplerspectraltrace,press
Calcs.
2 Fromthecalculationsmenu,selectVTI under
MV,AV,TV,PV,orLVOT.
3 Positionthecaliperatthestartofthe
waveform,andthen
clicktostartthetrace.