Kidney Stone Size and Hounsfield Units Predict Successful Shockwave Lithotripsy in Children

El‐Assmy, Ahmed; El-Nahas, Ahmed R.; El-Ghar, Mohamed Abou; Awad, Bassam A.; Sheir, Khaled Z.

doi:10.1016/j.urology.2012.12.012

Cited by 53 publications

(30 citation statements)

References 18 publications

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“…In addition, the need for multiple treatment sessions is concerning because the effects of shock waves on renal tissue could be hazardous (14). Stone-free rates after a single SWL session remain as low as 42.1% and 46% have shown in different series, and in harmony with our results, 45.3% (15,16). the literature shows that stonefree rates of pediatric renal stones after multiple sessions of SWL remain 54-100% (16).…”

Section: Discussionsupporting

confidence: 85%

Factors Affecting the Number of Shock Wave Lithotripsy Session in Children with Renal Stones: Are age and Radiolucency the Predictors of Success?

Kocaoğlu¹,

Soran²,

Kocaoğlu³

et al. 2017

Erciyes Med J

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Objective: We aimed to investigate the effectiveness of shock wave Lithotripsy (SWL) and factors affecting seance number while treating children with renal stones. Materials and Methods: A total of 50 children (53 renal units) who underwent SWL for renal stones between 2012 and 2014 were investigated retrospectively. The demographics of patients, the number, size, side, location, and radiolucency of stones in kidneys, placement of JJ stents, shock number, energy, seance number, stone-free rate, and complications were noted. Results: Patients involved 25 girls and 25 boys with a median age of 4.0 years ranging from eight months to 16 years (21≤3y). Stones were located in the renal pelvis and calyxes in 20 and 33 patients, respectively. Of the renal stones, 33 were single and 20 were multiple. The mean stone size was 11.02±5.4 mm. Success rates were 45.3, 75.5, and 92.5% after seances 1, 2, and 3, respectively. Per seance, the mean SWL shock waves and energy were 1219±262 and 12.6±0.9 kV. A significant relationship was found between the need for a third seance and patient age (≤3 years and >3), radiolucent and radiopague, ≤10 mm and >10 mm or single and multiple stone (p<0.05). However, no significant relationship was found between success rate and age; sex; number, size, location, and side of stones; and radiolucent stones. Conclusions: Age, radiolucency, stone size, and number of stones were significant predictors of SWL success in children. We observed that stone-free status is achieved more quickly, even within the first or second SWL seances by significantly decreasing the need for the third séance in group age ≤3 years, radiolucent, ≤10 mm or single renal stones.

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Section: Discussionsupporting

confidence: 85%

Factors Affecting the Number of Shock Wave Lithotripsy Session in Children with Renal Stones: Are age and Radiolucency the Predictors of Success?

Kocaoğlu¹,

Soran²,

Kocaoğlu³

et al. 2017

Erciyes Med J

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“…There are some overlaps between the CT numbers, especially when differentiating struvite from cystine and calcium oxalate from brushite calculi. CT is quite accurate in differentiating the 3 most common types of renal calculi of uric acid, calcium oxalate and struvite [17,18]. The average absolute CT value for uric acid ranges from 409 to 540 HU, while for struvite it ranges from 651 to 943 HU and for calcium oxalate calculi from 948 to 1,620 HU between the different series (table 4.…”

Section: Discussionmentioning

confidence: 97%

EVALUATION OF RENAL STONES BY COMPUTED TOMOGRAPHY AND ITS CORRELATION WITH URINE pH AND BIOCHEMICAL ANALYSIS

Bonigala¹,

S²

2018

IJCBR

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“…Thus, urinary stones with a mean stone density of >1000 HU is deemed to be resistant to SWL (21). El-Assmy et al (22) found that a stone attenuation of ≤600 HU was Figure 1. Diagonal segments are produced by ties ROC: Receiver operating characteristic a significant independent predictor of SWL success in children.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Hounsfield Unit and İntraoperative “GATA Scale” Score to Determine Requirement of DJ Stent Insertion in Ureteral Stone Treatment

Ediz¹,

Akan²,

Şahin³

et al. 2020

jus

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In this study, we aimed to determine the contribution of hounsfield unit (HU) measurement with non-contrast-enhanced computed tomography to the treatment of a single ureteral stone, and compare the value of HU and intraoperative "GATA scale" score in deciding for DJ stent placement in patients with a single ureteral stone. Materials and Methods: Ninety patients diagnosed with a single ureteral stone in our clinic between January 2018 and September 2018 were evaluated prospectively. We planned a new scale called "GATA scale" with three benchmarks. The validity and reliability of HU were compared with those of GATA scale score. Statistical significance was defined as p<0.05. Results: The mean stone volume at diagnosis was 245.29±23.9 mm 3. The mean HU of ureteral stones was 1065.21±33.5. The mean total score according to GATA scale was 6.44±0.2. To determine the threshold value for factors affecting stent placement after lithotripsy, receiver operating characteristic analysis was performed for stone volume, laser duration, total energy to complete laser lithotripsy and GATA scale score and showed that the optimal thresholds were 164.01 mm 3 , 4.25 mins, 1004 W and 7.5, respectively. Conclusion: In clinical practice, GATA scale can be used in decision making for DJ stents placement. Stent placement following lithotripsy is recommended especially in patients with a stone volume of greater than 160 mm 3 or total energy to complete laser lithotripsy over 1000 W or laser duration longer than 4 minutes or GATA scale score higher than 7.

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Kidney Stone Size and Hounsfield Units Predict Successful Shockwave Lithotripsy in Children

Cited by 53 publications

References 18 publications

Factors Affecting the Number of Shock Wave Lithotripsy Session in Children with Renal Stones: Are age and Radiolucency the Predictors of Success?

Factors Affecting the Number of Shock Wave Lithotripsy Session in Children with Renal Stones: Are age and Radiolucency the Predictors of Success?

EVALUATION OF RENAL STONES BY COMPUTED TOMOGRAPHY AND ITS CORRELATION WITH URINE pH AND BIOCHEMICAL ANALYSIS

Comparison of Hounsfield Unit and İntraoperative “GATA Scale” Score to Determine Requirement of DJ Stent Insertion in Ureteral Stone Treatment

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