SonoSite S-Cath - Page 56

46 Calculations
To calculate Qp/Qs
TheQp/Qscalculationrequirestwo
measurementsin2Dandtwomeasurementsin
Doppler.Afterthemeasurementsaresaved,the
resultappearsinthepatientreport.
1 Onafrozen2Dimage,press Calcs.
2 DothefollowingtomeasurefromLVOTD
andagaintomeasurefromRVOT D:
a Fromthecalculationsmenu,
locateQp/Qs
andthenselectLVOT D or RVOT D.
b Positionthecalipers.(See“Workingwith
calipers”onpage 33.)
c Savethecalculation.(See“Tosavea
calculation”onpage 38.)
3 OnafrozenDopplerspectraltrace,press
Calcs.
4 DothefollowingtomeasurefromLVOTVTI
andagaintomeasurefromRVOTVTI:
a From
thecalculationsmenu,selectQp/Qs
andthenselectLVOT VTI or RVOT VTI.
b Usingthetouchpad,positionthecaliper
andthenclick.
c Usingthetouchpad,tracethewaveform.
Tomakeacorrection,press Undoor
backtrackwiththetouchpad.
d PressSettocompletethetrace.
e Savethecalculation.(See“Tosavea
calculation”
onpage 38.)
Forinformationontheautomatictracetool,see
“Totrace automatically(Doppler)”onpage 37.
To calculate Stroke Volume (SV) or Stroke
Index (SI)
TheSVandSIcalculationsrequirea
measurementin2Dandameasurementin
Doppler.SIalsorequiresBodySurfaceArea
(BSA).Afterthemeasurementsaresaved,the
resultappearsinthepatientreport.
1 (SIOnly)FillintheHeightandWeightfields
onthepatientinformationform.TheBSAis

calculatedautomatically.(See“Tocreatea
newpatientinformationform”onpage 27.)
2 MeasurefromLVOT(2D):
a Onafrozen2Dimage,press Calcs.
b Fromthecalculationsmenu,selectLVOT D.
c Positionthecalipers.(See“Workingwith
calipers”onpage 33.)
d Savethecalculation.(See“Tosavea
calculation”onpage 38.)
3 Measure
fromaorta(Doppler).See“To
calculateVelocityTimeIntegral(VTI)”on
page 43.Fromthecalculationsmenu,select
AVandthenselectVTI.
Forinformationontheautomatictracetool,see
“Totraceautomatically(Doppler)”onpage 37.
To calculate Heart Rate (HR)
Savingtheheartratetothepatientreport
overwritesanyheartrateenteredonthepatient
informationform.
1 OnafrozenDopplerspectraltrace,press
Calcs.
2 Fromthecalculationsmenu,selectHR.
Averticalcaliperappears.
3 Usingthetouchpad,positionthevertical
caliperatthepeakoftheheartbeat,and
then
click.
Asecondverticalcaliperappears.Theactive
caliperishighlightedgreen.