Fig. 17.1
Normal conditions; no evident modifications of the intrarenal excretory tract after the administration of a diuretic challenge test
Increased pyelocalyceal diameters with a return to basal conditions within 60’ from the start of the examination (Fig. 17.2)
Fig. 17.2
Normal conditions, with a mild increase in pyelocalyceal diameters after USDC, and a complete return to basal conditions within 60’
Pictures of non-obstructive urine stagnation (pyeloureteral hypotone)
Return to basal conditions of various degrees of pyelocalyceal dilation between 60’ and 90’ (Fig. 17.3)
Fig. 17.3
Non-obstructive stasis conditions, with a mild increase in the pyelocalyceal diameters after USDC and return to basal conditions within 90’
Pictures of a moderate degree of obstruction
Return to basal conditions of various degrees of pyelocalyceal dilation between 90’ and 150’ (Figs. 17.4 and 17.5)
Fig. 17.4
Moderate obstruction, with very mild baseline pyelectasia that increased after USDC and returned to basal conditions by 150’
Fig. 17.5
Moderate obstruction with mild baseline pyelocalycectasia that increased after USDC and returned to baseline conditions by 150’
Pictures of severe obstruction
None or mild pyelocalycectasia at baseline, increased pyelocalyceal diameters after USDC, and failure to return to basal conditions within 150’ (Fig. 17.6)
Fig. 17.6
Severe obstruction, the absence of ectasia of the intrarenal tract at baseline, increased pyelocalyceal diameters after USDC, and failure to return to basal conditions by 150’ (tendance to intermittent hydronephrosis)
Hydronephrosis at baseline, increased pyelocalyceal diameters after USDC, and failure to return to basal conditions within 150’ (Fig. 17.7)
