RENAL ARTERIAL DOPPLER VELOCIMETRIC INDICES AMONG HEALTHY SUBJCTS IN NORTH WEST NIGERIA.

BACKGROUND

Doppler sonography is a non-invasive modality for evaluation of renal vascular anatomy and flow dynamics, causes of secondary hypertension and renal diseases.

AIM

To determine the normal reference values for the renal arterial Doppler velocimetric indices in healthy adults and correlate them with gender and age.

METHODOLOGY

The subjects consist of 36 males and 44 females. They were scanned using 3.5MHz transducer. After parenchymal assessment, the renal arteries were identified using colour mapping, followed by measurement of velocimetric indices on spectral Doppler tracings on each side.

RESULTS

The mean peak systolic velocity (PSV) was highest on the left side in males measuring 65.75 ± 28.41cm/sec and 60.7 ± 24.20cm/sec on the right. In females, it measured 61.83 ± 22.50cm/sec and 60.04 ± 24.67cm/sec on the right and left sides. The mean end diastolic velocity (EDV) was higher on the right side, measuring 23.59 ± 11.45cm/sec and 22.50 ± 8.37cm/sec in males and 25.19 ± 10.72cm/sec and 22.33 ± 8.47cm/sec in females. There was age related dependency on the mean resistive index (RI).

CONCLUSION

This study has shown that there was a statistical significant correlation between RI and systolic-diastolic ratio (S/D) with age. However, gender did not show significant correlation with these indices.