SonoSite S-Cath - Calculations; Calculations Menu

Chapter 4: Measurements and Calculations 37
Measurements
Seealso“Tosaveameasurementtoacalculation
andpatientreport”onpage 33and“Toadd
calipers(Doppler)”onpage 37.
To trace automatically (Doppler)
Aftertracingautomati cally,confirmthat the
system‐generatedboundaryiscorrect.Ifyouare
notsatisfiedwiththetrace,obtainahigh‐quality
Dopplerspectraltraceimage,ortracemanually.
(See“Totracemanually(Doppler)”onpage 36.)
1 OnafrozenDopplerspectraltrace,press
Calipers.
2 Press Auto.
Avertical
caliperappears.
3 Usingthetouchpad,positionthecaliperatthe
beginningofthewaveform,and thenclick.
Asecondverticalcaliperappears.
Ifyoupositioncalipersincorrectly,theresults
areinaccurate.
4 Usingthetouchpad,positionthesecond
caliperattheendofthewaveformandthen
pressSet.
Themeasurementresultsappear.
Seealso“Toaddcalipers(Doppler)”onpage 37.
Trace results
Dependingontheexamtype,theresultsfrom
tracingincludethefollowing:
•VelocityTimeIntegral(VTI)
•PeakVelocity(Vmax)
•MeanPressureGradient(PGmean)
•PeakSystolicVelocity(PSV)
•TimeAverageMean(TAM)*
•+/×orSystolic/Diastolic(S/D)
•PulsatilityIndex(PI)
•EndDiastolicVelocity(EDV)
• AccelerationTime(AT)
•ResistiveIndex(RI)
•MaximumPressureGradient(PGmax)
To add calipers (Doppler)
Withameasurementactive,youcanaddcalipers
toperformadditionalmeasurements.
 Pressoneofthefollowing:
• Add Calipertomeasurevelocityand
pressuregradient
• Timetomeasuretimeduration
• Manualtotracemanually
• Autototraceautomatically
ThesecondmeasurementislabeledB.The
thirdislabeledC,andsoon.
Calculations
Withincalculations,youcansavemeasurement
resultstothepatientreport.Youcandisplay,
repeat,anddeletemeasurementsfroma
calculation.Somemeasurementscanbedeleted
directlyfromthepatientreportpages.See
“Patientreport”onpage 52.
Calculationpackagesdependonexamtype,
transducer,andSSeriessystem.
Calculations menu
Thecalculationsmenucontainsmeasurements
availablefortheimagingmodeandexamtype.
Afteryouperformandsaveameasurement,the
resultsavestothepatientreport.(See“Patient
report”onpage 52.)Also,acheckmarkappears
nexttothemeasurementnameinthecalculations
menu.Ifyouhighlightthechecked
measurement
name,theresultsappearbelowthemenu.Ifyou
repeatthemeasurement,theresultsbelowthe
menureflecteitherthelastmeasurementorthe
average,dependingonthemeasurement.