RENAL ARTERIAL DOPPLER VELOCIMETRIC INDICES AMONG HEALTHY SUBJCTS IN NORTH WEST NIGERIA
Ismail A, Ademola BL1, Yusuf L, Abdulmalik MA2
Department of Radiology, Bayero University, Kano, Nigeria. Email: aismail.rad@buk.edu.ng
1Nephrology Unit, Department of Medicine, Aminu Kano Teaching Hospital, Kano, Nigeria.
2Department of Radiology, Rasheed Shekoni Teaching Hospital, Dutse, Jigawa state, Nigeria.
*Correspondence
Grant support: None
Conflict of interest: None
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ABSTRACT
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.
Key words: Renal artery Doppler, Resistive indices, Influence of gender and age.
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