Abstract: Objective To explore and analysis the prognostic values of hemodynamic parameters of renal parenchymal arterioles by color Doppler ultrasound in elderly patients with hypertension. Methods From August 2022 to March 2023, 88 cases of elderly patients with essential hypertension who were diagnosed and treated in a certain hospital were selected as the study subjects, all the cases to determine the occurrence of renal injury in the patients. The color Doppler ultrasound were used to examine the hemodynamic parameters of renal parenchymal arterioles in all patients, and correlation analysis were performed. Results In the 88 patients, there were 18 cases (20.45%) had renal injury. There were no significant differences in gender, age, systolic blood pressure, diastolic blood pressure, body mass index, and heart rate compared between the renal injury group and the non renal injury group (P>0.05). The levels of urinary microalbumin, serum creatinine, and blood urea nitrogen in the renal injury group were significantly higher than those in the non renal injury group (P<0.05). The renal length, renal cortical thickness, and renal width in the renal injury group were significantly increased compared with those in the non renal injury group (P<0.05). The end diastolic blood flow velocity and the maximum systolic flow velocity of the renal parenchymal arterioles in the renal injury group were lower than those in the non renal injury group (P<0.05), and the pulsation index and resistance index were significantly higher than those in the non renal injury group (P<0.05). In the 88 patients, Spearman correlation analysis showed that the occurrence of renal injury were correlated with end-diastolic blood flow velocity, maximum systolic flow velocity, pulsation index, and resistance index of renal parenchymal arterioles (P<0.05). Conclusion The probability of renal injury in elderly patients with essential hypertension is relatively high, which can cause changes in the renal structure and hemodynamic parameters of renal parenchymal arterioles. The hemodynamic parameters of renal parenchymal arterioles can evaluate the prognosis of patients with renal injury.

Key words: elderly, essential hypertension, renal injury, renal structure, renal parenchymal arterioles, hemodynamic parameters, prognostic evaluation