Article Figures & Data
Figures
- Fig 1.
Reasons for exclusion of articles after selection.
- Fig 2.
The percentage of patients with emboli detected in each of the 14 studies listed in Table 3.
Tables
Criteria 1) Doppler microembolic signal is transient, usually lasting <300 ms 2) The amplitude is usually at least 3 dB higher than the background blood flow 3) A signal is unidirectional within the Doppler velocity spectrum 4) Microembolic signal is accompanied by an audible output Parameters 1) Ultrasound device 2) Transducer type 3) Insonated artery 4) Insonation depth 5) Algorithms for signal-intensity measurement 6) Scale settings 7) Detection threshold 8) Axial extension of sample volume 9) Fast Fourier transformation size (no. of points used) 10) Fast Fourier transformation length (time) 11) Fast Fourier transformation overlap 12) Transmitted ultrasound frequency 13) High-pass filter settings 14) Recording time Study No. Study Name Year No. of Patients Studied 1 Forteza et al4 1999 5 2 Sulek et al20 1999 22 3 Edmonds et al17 2000 23 4 Rodriguez et al11 2001 13 5 Rodriguez et al12 2001 4 6 Riding et al15 2004 41 7 Rodriguez et al19 2005 37 8 Kalairajah et al18 2006 24 9 Koch et al8 2007 24 10 Barak et al5 2008 22 11 Gray et al6 2008 20 12 Gray et al22 2009 20 13 Patel et al13 2009 24 14 Patel et al7 2010 45
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