Effects of extracorporeal shock‐wave lithotripsy on intrarenal resistive index

Nazaroğlu, Hasan; Akay, Ali; Bükte, Yaşar; Şahın, Hayrettin; Akkuş, Zeki; Bilici, Aslan

doi:10.1080/00365590310006354

Cited by 24 publications

(20 citation statements)

References 11 publications

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“…Nazaroglu et al demonstrated that there was no meaningful relationship between the applied energy and increase of vascular RI. 27 In our study, no relationship was found between shock power and vascular RI variations (the difference between vascular RI before and after lithotripsy). Our study found a meaningful relationship between age and vascular RI measured after 1 week.…”

Section: Discussioncontrasting

confidence: 37%

Renal Vascular Doppler Resistance after Extracorporeal Shock Wave Lithotripsy

et al. 2013

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Objectives: Extracorporeal shock wave lithotripsy (ESWL) is mainly an alternative for other therapeutic methods such as surgery and endourology to treat urinary tract calculus. Although it is safe and effective, it has undesirable effects on renal function. Diagnostic techniques such as color Doppler ultrasonography create a new attitude toward renal function. The aim of this study was to evaluate renal vascular resistance change before and after extracorporeal shock wave lithotripsy. Methods: During the present study, vascular resistive index (RI) of renal intralobar artery was measured before, 30 min, and 1 week after ESWL using Doppler ultrasonography. Results: Thirty minutes after ESWL, RI was significantly increased from primary value of 0.62 AE 0.05 to 0.66 AE 0.06 (p ¼ 0.0001). There was no correlation between increase of RI and patients' age. Following up the patients revealed that mean RI did not return to pretreatment level after 1 week (p < 0.05). The RI level in the old patients (3 patients who were 60 years or older) was higher than that of the younger ones (19 patients who were younger than 60 years) after 1 week (0.76 AE 0.05 vs. 0.64 AE 0.06). There was no meaningful relationship between ESWL voltage or number of shocks and RI variation before and after ESWL. Conclusion: Following ESWL, patients are at risk of renal tissue damage due to increase of primary RI level. Measuring RI variations using ultrasound techniques after ESWL may provide helpful information to clinical detection of renal tissue damage.

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Section: Discussioncontrasting

confidence: 37%

Renal Vascular Doppler Resistance after Extracorporeal Shock Wave Lithotripsy

et al. 2013

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Section: Discussionmentioning

confidence: 88%

“…A transient decrease in the perfusion of treated (and contralateral) kidneys has been reported for up to 24 h after a SWL session [10,11]. These effects were not observed 2 weeks after the SWL session [11]. If we consider reduced urine production as a result of decreased kidney perfusion after SWL, then we can hypothesize that sleeping ipsilaterally can counteract this reduced blood flow by increasing the flow to the dependent kidney and possibly improves stone fragmentation and clearance through improved diuresis.…”

Section: Discussionmentioning

confidence: 98%

Impact of Sleep Position on Stone Clearance after Shock Wave Lithotripsy in Renal Calculi

et al. 2011

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Objectives: We evaluated the impact of sleep position on the effectiveness of shock wave lithotripsy (SWL) in renal calculi. Patients and Methods: Patients (n = 120) with a single radiopaque renal stone who were candidates for SWL were enrolled. For studying patients’ position during sleep, a novel sleep position recorder was designed. Group 1 (n = 60) consisted of patients who slept preferentially on the ipsilateral side of the stone; group 2 (n = 60) comprised patients who slept preferentially on the contralateral side. Treatment effectiveness was defined as the absence of residual stones >3 mm up to 3 months after SWL. Results: The mean (range) percent of sleep on the ipsilateral side of the stone was 61.5% (51–78) and on the contralateral side it was 62.4% (51–81) in groups 1 and 2, respectively (p > 0.05). The overall success rate of SWL was 88.3% (77.4–95.2) and 70.0% (56.8–81.2) in groups 1 and 2, respectively (p = 0.01). Stone clearance increased with an increasing percent of total sleep time on the ipsilateral side of the kidney stone (p = 0.045). Conclusions: The percent of stone-free patients was higher in the group of patients who slept ipsilaterally relative to the kidney stone compared with patients who slept on the contralateral side.

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“…Almost all radiological studies in the literature have focused on the limitations of radiologic tools to understand SWL-related changes. Among these tools, CDU is easy to apply, cost effective, and has the potential to determine renal function and kidney microcirculation [8,9,[15][16][17]. CDU was recently used as a noninvasive method to estimate renal function and has been used to obtain functional information after SWL sessions.…”

Section: Discussionmentioning

confidence: 99%

“…However, none of the radiological tools have been until now used to investigate the interval required between two SWL sessions. Measurement of the renal arterial resistive index (RI) of the kidney is a recently applied successful radiological tool that can reveal the resistance of intrarenal arteries, indirectly demonstrating effective renal blood flow [8][9][10]. Recently, it was shown that shock waves may decrease renal blood flow, which can lead to transient impairments in renal function after SWL [11].…”

Section: Introductionmentioning

confidence: 99%

The Daily Resistive Index measurement useful tool in the estimation of the optimal time interval between two Shock Wave Lithotripsy sessions.

et al. 2015

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Objective: To monitor the impact of Shock Wave Lithotripsy (SWL) on the renal resisive index (RI) and to investigate the potential of the RI measurement for the estimation of the optimal duration between 2 SWL sessions. Material and methods: Thirty patients with single pelvis renalis stone were included. Participitants were grouped according to their age as group1 (<40 years, mean age 36.2±3.9 years) and group 2 (≥40 years, mean age 55.4±6.5 years). RI measurement was performed in of all patients prior to SWL. After SWL, RI was monitored daily until RI returned to their pre-SWL values. Results: The mean stone size was 2 8.97±3.62 in group 1 and 10.08±4.67 mm in group 2 (p=0.077). Following SWL RI value of both goups increased and higher RI value was measured at 24 th hour as compared with their pre-SWL values (p<0.001). In day 2 RI of the groups declined, but the differences were still statistically different from their pre-SWL RI values (p<0.001). However, on the third day, RI of group 1 was close to their pre-SWL level (p=0.143). But, in group 2, RI value returned to their pre-SWL limits on day 4 (p=0.229). Conclusions: RI measurement gives important data regarding SWL related acute renal trauma and should be used as an US marker for recovery after SWL.

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Effects of extracorporeal shock‐wave lithotripsy on intrarenal resistive index

Cited by 24 publications

References 11 publications

Renal Vascular Doppler Resistance after Extracorporeal Shock Wave Lithotripsy

Renal Vascular Doppler Resistance after Extracorporeal Shock Wave Lithotripsy

Impact of Sleep Position on Stone Clearance after Shock Wave Lithotripsy in Renal Calculi

The Daily Resistive Index measurement useful tool in the estimation of the optimal time interval between two Shock Wave Lithotripsy sessions.

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