SonoSite S-Cath - Page 46

36 Measurements
To measure Velocity (cm/s) and Pressure
Gradient (Doppler)
Thismeasurementinvolvesasinglecaliperfrom
thebaseline.
1 OnafrozenDopplerspectraltrace,press
Calipers.
Asinglecaliperappears.
2 Usingthetouchpad,positionthecalipertoa
peakvelocitywaveform.
See“Tosaveameasurementtoacalculationand
patientreport”onpage 33.
To measure Velocities, Elapsed Time,
Velocity Ratio (A/B), Resistive Index (RI), and
Acceleration (Doppler)
Note: ResistiveIndexismeasuredinallavailable
examsbutthecardiacexam.
1 OnafrozenDopplerspectraltrace,press
Calipers.
Asinglecaliperappears.
2 Usingthetouchpad,positionthecalipertoa
peaksystolicwaveform,andthenclick.
Asecondcaliperappears.
3 Usingthetouchpad,positionthesecond
caliperatthe
enddiastoleonthewaveform.
Seealso“Toaddcalipers(Doppler)”onpage 37
and“To saveameasurementtoacalculationand
patientreport”onpage 33.
To measure time duration (Doppler)
1 OnafrozenDopplerspectraltrace,press
Calipers.
2 Press Time.
Averticalcaliperappears.
3 Usingthetouchpad,positionthecaliper
wheredesired,andthenclick.
Asecondcaliperappears.
4 Usingthetouchpad,positionthesecond
caliperwheredesired.
Seealso“Toaddcalipers(Doppler)”onpage 37.
To measure Pressure Half Time (Doppler)
1 OnafrozenDopplerspectraltraceinthe
Cardiacexam,press Calipers.
2 Press PHT.
Apairofcalipersappears.
3 Positionthecalipersalongtheslopeyouwant
tomeasure.See“Workingwithcalipers”on
page 33.
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 manually (Doppler)
1 OnafrozenDopplerspectraltrace,press
Calipers.
2 Press Manual.
Asinglecaliperappears.
3 Usingthetouchpad,positionthecaliperatthe
beginningofthedesiredwaveform,andthen
click.
Ifyoupositioncalipersincorrectly,theresults
areinaccurate.
4 Usingthetouchpad,tracethewaveform.
Tomakeacorrection,press
 Undo.
5 Click.
Themeasurementresultsappear.