Standardized Duplex Ultrasound-Based Protocol for Early Diagnosis of Transplant Renal Artery Stenosis: Results of a Single-Institution Retrospective Cohort Study

Table 5

Comparison of ΔSPV, ΔRI, ΔSBP, ΔDBP, and ΔeGFR values among the TRAS-patients at different time periods from renal transplantation. TRAS = transplant renal artery stenosis; SPV = systolic peak velocity; RI = resistive indexes.

	Time to TRAS treatment			value
	<3 months; ()	3–12 months; ()	>12 months; ()
Δ systolic peak velocity (SPV) at the level of TRAS (poststent SPV − prestent SPV); (ml/min) (median, IQR)	−1,5 (−1,7; −0,7)	−1,6 (−1,9 −1,1)	−1,5 (−1,8; −1,2)	0,9
Δ resistive index (RI) at parenchymal level (poststent RI − prestent RI); () (median, IQR)	0,0 (−0,01; 0,09)	0,06 (0,00–0,12)	0,3 (0,01–0,08)	0,5
Δ mean systolic blood pressure (SBP) (poststent SBP − prestent SBP); (mmHg) (median, IQR)	−10,0 (−20,0; 0,0)	−10,0 (−40,0; 0,0)	−12,0 (−34; 2,0)	0,4
Δ mean diastolic blood pressure (DBP) (poststent DBP − prestent DBP); (mmHg) (median, IQR)	0,0 (−10; 5,0)	−10,0 (−20,0; 5,0)	5,0 (−14; 8,0)	0,3
Δ mean eGFR (poststent − prestent) (ml/min/m2); (median, IQR)	8,5 (−1,0; 25)	5,0 (−8,0; 16,0)	6,5 (−2; 18)	0,4