AGE-RELATED CHANGES IN RENAL RESISTIVE INDEX AFTER ESWL
Objective: To determine relation between age and resistive index (RI) changes occurring after extracorporeal shock wave lithotripsy (ESWL). Material & Method: We performed a prospective study in Soetomo Hospital Surabaya. Using duplex ultrasonography, RI was determined in 20 patients with calyceal kidney calculi and pelvic kidney calculi. RI of the interlobar renal arteries were measured in the region near the calculi (distance, less than 2 cm), one hour before ESWL and RI was measured again at 1 hour, 3 days and 7 days after ESWL. Changes in RI values and relation with age (≤ 60 years old and > 60 years old) were evaluated. Results: The renal RI increased significantly 1 hour and 3 days after ESWL, but returned to before ESWL values 7 days after ESWL in the both groups. Although there was positive correlation between age and RI before ESWL, but there was no correlation between age and RI changes after ESWL. Conclusion: Renal RI is higher with age > 60 years, after ESWL renal RI showed transient increase which returned to baseline after 7 days.
Key words: Color Doppler Ultrasonography, extracorporeal shock wave lithotripsy, renal resistive index, calyceal kidney calculi, pelvic kidney calculi.
Crum LA. Cavitation microjects as a contrybutory mechanism for renal calculi disintegration in ESWL. J Urol. 1998; 140: 1587.
Lingeman JE, Carter AM, Asimos DG, Baxley J. Current perspective on adverse effects in shock wave lithotripsy. American Urological Association Education and Research; 2009.
Türk C, Knoll T, Petrik A, Sarica K, Straub M, Seitz C. Guidelines on urolithiasis. European Association of Urology; 2011.
Grasso M. Extracorporeal shockwave lithotripsy. Director of Endourology, Lenox Hill Hospital; Professor and Vice Chairman, Department of Urology, New York Medical College; 2007. http://www.emedicine.com/med/TOPIC3024. HTM.
Ellah MA. Changes of renal blood flow after ESWL: Assessment by ASL MR imaging, contrast enhanced MR imaging, and renal resistive index. EJRad. 2010; 76: 124-8.
Kaude JV, Williams CM, Millner MR, Scott KN, Finlayson B. Renal morphology and function immediately after extracorporeal shock-wave lithotripsy. AJR. 1985; 145: 305–13.
Knapp PM, Kulb TB, Lingeman JE, Newman DM. Extracorporeal shock wave lithotripsy-induced perirenal hematomas. J Urol. 1988; 139: 700–3.
Knorr PA, Woodside JR. Large perirenal hematoma afterextracorporeal shock-wave lithotripsy. Urology. 1990; 35: 151–3.
Gilbert BR, Riehle RA,Vaughan ED Jr. Extracorporeal shock wave lithotripsy and its effect on renal function. J Urol. 1988; 139: 482-5.
Mohseni MG. Changes in intrarenal resistive index following electromagnetic extracorporeal shock wave lithotripsy. J Urol. 2007; 4: 217-20.
Granata A. Doppler ultrasound and renal artery stenosis: An overview. J Jus. 2009; xx: 1-11.
Knapp R. Age–related changes in resistive index following extra corporeal shock wave lithotripsy. J Urol. 1995; 154: 955–8.
Bude RO, Rubin JM. Relationship between resistive index and vascular compliance and resistance. Radiology Science of North America. 1999; 211: 411-7.
Lozada LGS. Glomerular hemodynamic changes associated with arteriolar lesions and tubulointerstitial inﬂammation.
Nazaroglu H. Effects of extracorporeal shock wave lithotripsy on intrarenal resistive index. Scand J Urol Nephrol. 2003; 37: 408-12.
Aoki Y. Changes in resistive index following extracorporeal shock wave lithotrisy. J Urol. 1999; 6: 483-92.
Hiros M. Effects of extracorporeal shockwave lithotripsy on renal vasculature and renal resistive index (RI). Med Arh. 2009; 63: 143-5.
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.