Duplex assessment of the renal artery and its internal branches in normal adult egyptian population

This work aimed at standardization of the normal renovascular Duplex parameters in adult Egyptian population. For this purpose, twenty apparently healthy subjects were chosen. Thorough clinical assessment and basic laboratory investigations were done for them and proved to be normal. Abdominal ultrasonography was done for all the studied group with assessment of the renal sonographic dimensions. Satisfactory visualization of both renal arteries by Duplex sonography could be accomplished in 100% of the group examined. Several Duplex parameters were recorded including diameter of the main renal artery, maximum, minimum and mean velocities in this segment of he vessel as well as velocity time integral, resistivity and pulsatility indices in the same segment. Maximum and minimum velocities as well as resistivity and pulsatility indices in the distal intrarenal arteries were also reocrded. The results of this study showed that the diameter of the main renal artery ranged from 0.41-0.53 cm with a mean of 0.48 +/- 0.03 cm [mean +/- SD]. Maximum velocity in the main renal artery ranged from 51-84 cm/sec with a mean of 62.1 +/- 8.3 cm/sec. Minimum velocity in the same segment ranged from 17-37 cm/sec with a mean of 24.2 +/- 4.5 cm/sec. Mean velocity in the same segment ranged from 31-53 cm/sec with a mean of 37 +/- 5.7 cm/sec. Velocity integral [VTI] ranged from 0.130-0.406 cm/sec with a mean of 0.262 +/- 0.09 cm/sec. Proximal resistivity index [RI] ranged from 0.36-0.71 with a mean of 0.61 +/- 0.05. Proximal pulsatility index [PI] ranged from 0.74-1.36 with a mean of 1.025 +/- 0.135. Maximum velocity in the distal intrarenal artery ranged from 15-50 cm/sec with a mean of 26.2 +/- 9.1 cm/sec. Minimum velocity in the same segment of the vessel ranged from 6-19 cm/sec with a mean of 10.5 +/- 3.4 cm/sec. Distal resistivity index [DRI] ranged from 0.51-0.69 with a mean of 0.59 +/- 0.04. Distal pulsatility index [DPI] ranged from 0.77-1.30 with a mean of 0.970 +/- 0.115. No significant relationship could be found between clinical, laboratory or ultrasonographic findings and the Duplex parameters. These results can be considered the standard renovascular Duplex parameters in normal adult Egyptians