Table 2 –
Doppler measurements of blood flow in and around MTrPs.
| Author | Measures | Comparison / Site | Results |
|---|---|---|---|
| Ballyns et al. 2011 | Pulsatility Index (PI) Resistive Index (RI) |
A-MTrPsa and L-MTrPsb vs. normal A-MTrPsa vs. normal All three |
Occurrence of retrograde flow higher (P<0.01) PI higher at A-MTrPsa (P<0.05) No difference in RI between sites (P>0.05) |
| Sikdar et al. 2009 | Resistive Index (RI) Frequency of retrograde diastolic flow |
A-MTrPsa L-MTrPsb Normal sites |
69% retrograde diastolic flow 16.7% retrograde diastolic flow 7% retrograde diastolic flow |
| Sikdar et al. 2010 | Pulsatility Index (PI) Resistive Index (RI) Peak systolic velocity (PSV) Minimum diastolic velocity (MDV) Acceleration time (AT) Time averaged peak velocity (TAPV) |
A-MTrPsa vs. normal sites A-MTrPsa vs. L-MTrPsb L-MTrPsb vs. normal sites |
PI and PSV increased; MDV decreased (P<0.05) PSV increased; MDV decreased (P<0.05); no difference in PI. No difference in PSV, MDV or PI No differences in RI, AT or TAPV between sites |
a
Active myofascial trigger points.
b
Latent myofascial trigger points.