Renal resistive index in hypertensive patients: a one centre study

Abstract

Background: Hypertension (HTN) is a leading cause of kidney dysfunction. Renal resistive index (RRI) was an index to evaluate arterial compliance and/or resistance, reflecting the reduction of kidney function and microalbuminuria. We investigated the relationship of RRI in hypertensive patients to detect kidney dysfunction early detection. Material and methods: This was a cross-sectional study at Wahidin Sudirohusodo hospital in June–November 2022. All hypertensive patients were evaluated for RRI. RRI was examined with intrarenal doppler ultrasound, and a cutoff ≥ 0.70 were used. Results: This study included 61 subjects. Thirty-five subjects were female, and 26 subjects were male 90.2% of subjects were below 60 years. Estimated glomerular filtration rate (eGFR) level was 90.29 ± 25.19 in RRI < 0.7 and 64.91 ± 31.79 in RRI ≥ 0.7. Our study found there was a significant difference between anti-hypertensive treatment and eGFR level with the RRI group (p-value < 0.05). There was no significant difference in sex, age, proteinuria, and HTN control status in both RRI groups. Conclusion: The renal resistive index is a useful marker for early renal dysfunction in hypertensive patients despite normal eGFR.

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