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Renal Doppler Indices in Sickle Cell Disease: Early Radiologic Predictors of Renovascular Changes

Kishor B. Taori1, Ritu S. Chaudhary1, Vinod Attarde1, Suresh Dhakate1, Virender Sheorain1, Prashant Nimbalkar1 and Preetam N. Wasnik2

1 Department of Radiodiagnosis, Government Medical College, Hanuman Nagar, Nagpur, Maharashtra 440003, India.
2 Department of Medicine, Government Medical College, Nagpur, Maharashtra, India.


Figure 1
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  		Fig. 1 —Flowchart shows observations of patients with sickle cell disease in this study compared with those excluded from study.

 

Figure 2
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  		Fig. 2 —10-year-old boy with homozygous sickle cell disease. Renal Doppler sonogram shows high-impedance flow represented by high pulsatility index (PI) and resistive index (RI) values (1.35 and 0.73, respectively) in interlobar artery of this sickle-affected patient.

 

Figure 3
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  		Fig. 3 —11-year-old boy with homozygous sickle cell disease. Renal Doppler sonogram shows high-impedance flow and early diastolic notch (arrow) in intrarenal waveform.

 

Figure 4
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  		Fig. 4A —Receiver operating characteristic (ROC) curves for both groups of patients with sickle cell disease. Green = reference line; red = pulsatility index. ROC curve for group 1 (homozygous, SS) patients (A) shows cutoff considered to be 0.70 for resistive index (RI). Area under curve = 0.98. ROC curve for group 2 (heterozygous, AS) patients (B) shows cutoff considered to be 0.70 for resistive index (RI). Area under curve = 0.97.

 

Figure 5
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  		Fig. 4B —Receiver operating characteristic (ROC) curves for both groups of patients with sickle cell disease. Green = reference line; red = pulsatility index. ROC curve for group 1 (homozygous, SS) patients (A) shows cutoff considered to be 0.70 for resistive index (RI). Area under curve = 0.98. ROC curve for group 2 (heterozygous, AS) patients (B) shows cutoff considered to be 0.70 for resistive index (RI). Area under curve = 0.97.

 

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