
Rev 1.1 VisualSonics Vevo 2100 Imaging System Operator Manual 377
Appendix A: Measurement package protocols
Label Description Units Generic type Mode
Asc Ao Ascending aorta length mm Length B-Mode
Trans Arch Transverse aortic arch diameter mm Length B-Mode
Desc Ao Descending aorta diameter mm Length B-Mode
Simpson's protocol
Measurement definitions
Label Description Units Generic type Mode
Simp Area Dist; d Simpson's area distal, diastole
mm
2
Area B-Mode
Simp Area Mid; d Simpson's area mid, diastole
mm
2
Area B-Mode
Simp Area Prox; d Simpson's area proximal, diastole
mm
2
Area B-Mode
Simp Length; d Simpson's length, diastole mm Length B-Mode
HR Heart rate BPM
Simp Area Dist; s Simpson's area distal, systole
mm
2
Area B-Mode
Simp Area Mid; s Simpson's area mid, systole
mm
2
Area B-Mode
Simp Area Prox; s Simpson's area proximal, systole
mm
2
Area B-Mode
Simp Length; s Simpson's length, systole mm Length B-Mode
Calculation definitions
Name Description Units Formula
Simp Volume; d
Simpson's volume
calculation in diastole
µl
Where:
h = Simpson Length in diastole
Simp Volume; s
Simpson's volume
calculation in systole
µl
Where:
h = Simpson Length in systole
Simp SV Stroke Volume µL Simp Volume; d - Simp Volume; s
Simp FAC Fraction area change % 100 * (Simp Area Mid;d- Simp Area Mid;s)/Simp Area Mid; d
Simp %EF Ejection fraction % 100 * Simp Sv / Simp Volume; d
Simp %FS Fractional shortening % 100*(Simp Length; d - Simp Length; s) / (Simp Length; d)
Simp CO Cardiac output ml/min Simp SV * Heart Rate
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