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. Author manuscript; available in PMC: 2018 Nov 1.

Published in final edited form as: J Ultrasound Med. 2017 Apr 13;36(11):2245–2256. doi: 10.1002/jum.14209

Fig. 2a–b — Color Doppler sonography is used to measure the intrarenal artery Doppler parameters. 2a is a longitudinal section of the left kidney in a subject with pathologic mild CKD. With corrected Doppler angle (the direction of blood flow to the direction of the sound beam) of 15°, peak systolic velocity (PS), end diastolic velocity (ED), and resistive index (RI) measure 37.5 cm/s, 14.2 cm/s, and 0.62, respectively. Doppler parameters are measured in another subject with pathologic moderate CKD (2b). With corrected Doppler angle of 15°, interlobar artery peak systolic velocity (PS), end diastolic velocity (ED), and resistive index (RI) measure 22.2 cm/s, 8.4 cm/s, and 0.62, respectively. One can note that both peak systolic velocity and end diastolic velocity in moderate CKD are significantly lower than in mild CKD. LK, left kidney.

Fig. 2a–b — Color Doppler sonography is used to measure the intrarenal artery Doppler parameters. 2a is a longitudinal section of the left kidney in a subject with pathologic mild CKD. With corrected Doppler angle (the direction of blood flow to the direction of the sound beam) of 15°, peak systolic velocity (PS), end diastolic velocity (ED), and resistive index (RI) measure 37.5 cm/s, 14.2 cm/s, and 0.62, respectively. Doppler parameters are measured in another subject with pathologic moderate CKD (2b). With corrected Doppler angle of 15°, interlobar artery peak systolic velocity (PS), end diastolic velocity (ED), and resistive index (RI) measure 22.2 cm/s, 8.4 cm/s, and 0.62, respectively. One can note that both peak systolic velocity and end diastolic velocity in moderate CKD are significantly lower than in mild CKD. LK, left kidney.