SonoSite S-Cath - Page 54

44 Calculations
4 Usingthetouchpad,tracethewaveform.
Tomakeacorrection,press Undoor
backtrackwiththetouchpad.
5 PressSettocompletethetrace.
6 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 Right Ventricular Systolic
Pressure (RVSP)
1 OnafrozenDopplerspectraltrace,press
Calcs.
2 Fromthecalculationsmenu,selectTVand
thenselectTRmax.
3 Positionthecaliper.(See“Workingwith
calipers”onpage 33.)
4 Savethecalculation.(See“Tosavea
calculation”onpage 38.)
5 ToadjusttheRApressure,see“Cardiac
patientreport”onpage 52.
Changingthe
RApressurefromthedefault5
affectstheRVSPcalculationinthepatient
report.
To calculate Pressure Half Time (PHT) in MV,
AI, or TV
1 OnafrozenDopplerspectraltrace,press
Calcs.
2 Fromthecalculationsmenu,selectMV, AV,or
TV,andthenselectPHT.
3 Positionthefirstcaliperatthepeak,andpress
the
SELECTkey.
Asecondcaliperappears.
4 Positionthesecondcaliper:
•InMV, positionthecaliperalongtheEF
slope.
•InAV,positionthecaliperattheend
diastole.
5 Savethecalculation.(See“Tosavea
calculation”onpage 38.)
To calculate Proximal Isovelocity Surface
Area (PISA)
ThePISAcalculationrequiresameasurementin
2D,ameasurementinColor,andtwo
measurementsinDopplerspectraltrace.Afterall
measurementsaresaved,theresultappearsin
thepatientreport.
1 MeasurefromAnnD(2D):
a Onafrozen2Dimage,press Calcs.
b Fromthecalculationsmenu,locatePISA,
andthenselectAnn D.
c Positionthecalipers.(See“Workingwith
calipers”onpage 33.)
d Savethecalculation.(See“Tosavea
calculation”onpage 38.)
2 MeasurefromRadius(Color):
a OnafrozenColorimage,press Calcs.
b Fromthecalculationsmenu,selectRadius.
c Positionthecalipers.
d Savethecalculation.
3 Ona
frozenDopplerspectraltrace,press
Calcs.
4 DothefollowingtomeasurefromMRVTI
andagaintomeasurefromMVVTI(Doppler):
a Fromthecalculationsmenu,selectPISA
andthenselectMR VTI orMV VTI.
b Positionthecaliperatthestartofthe
waveform,andthenclicktostartthetrace.
c
Usingthetouchpad,tracethewaveform.