Formula for predicting the impaction of ureteral stones

AbstractThe purpose of the study was to investigate variables that may predict ureteral stone impaction and create a new model to predict more accurately stone impaction based on preoperative NCCT findings. Data of 238 patients who underwent URS were analyzed. Stone size, stone location, Hounsfield unit (HU) value of the stone, ureteral wall thickness (UWT) and grade of hydronephrosis were recorded. HU values of the ureter which are measured proximal and distal to the stone were recorded. Subsequently, we determined the factors that could predict the stone impaction in univariate and multivariate logistic regression analysis. After the AUC analysis for these factors, we created a new model to predict more accurately stone impaction. The formula was named Impacted Stone Formula (ISF). Stone impaction verified endoscopically. Predictors of impacted stones were evaluated using univariate and multivariate logistic regression analyses. Diagnostic value for the prediction of stone impaction was analyzed with receiver operating characteristic (ROC) incline. Overall, there were 196 patients included in the study. Multivariate regression analysis revealed that the HU below/above ratio, UWT, and grade of hydronephrosis were the crucial predictors of stone impaction (OR 20.53,p 
Source: Urolithiasis - Category: Urology & Nephrology Source Type: research

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CONCLUSIONS: The vmPCNL seems to be sustainable, safe and feasible for kidney stones treatment in the pediatric population. PMID: 33016029 [PubMed - as supplied by publisher]
Source: Minerva Urologica e Nefrologica - Category: Urology & Nephrology Tags: Minerva Urol Nefrol Source Type: research
AbstractTo investigate the reliability of newly defined CT-related parameters and cardiovascular risk factors in groups adjusted for stone size and location to predict spontaneous stone passage (SP) of uncomplicated ureteral stones  ≤ 10 mm. The data of 280 adult patients with solitary unilateral ureteral stones ≤ 10 mm in diameter in non-contrast computed tomography were prospectively recorded. All patients undergoing a four-week observation protocol with medical expulsive therapy using tamsulosin were divided i nto two groups according to SP or no SP. Demographic, clinical and ...
Source: Urolithiasis - Category: Urology & Nephrology Source Type: research
CONCLUSIONS: Diabetic patients are under greater risk to develop postoperative UTI following URS. Those patients with UTI history and HbA1c level higher than 6.9% must be followed carefully. PMID: 32886078 [PubMed - as supplied by publisher]
Source: Archivos Espanoles de Urologia - Category: Urology & Nephrology Tags: Arch Esp Urol Source Type: research
CONCLUSION: Utilizing direct visual semi-rigid ureteroscopic dilation with a semi-ridged ureteroscope prior to flexible ureteroscopy leads to successful primary ureteroscopy for renal stone treatment in most patients. This technique is an effective, safe and possibly cost-effective method of obtaining ureteral access to facilitate primary URS for renal stone treatment. PMID: 32861259 [PubMed - in process]
Source: Canadian Journal of Urology - Category: Urology & Nephrology Tags: Can J Urol Source Type: research
 A large left renal calculus in the renal pelvis. Significant obstruction looking to the severe hydronephrosis. see more:https://www.ultrasound-images.com/renal-calculi/
Source: cochinblogs - Category: Radiology Source Type: blogs
Conclusion: In the treatment of 2-4 cm renal stone, using V-UAS in RIRS can improve surgical efficiency with lower postoperative early pain scores. Comparing with MPCNL, its initial SFR was more depressed, and there is still a trend towards requiring more auxiliary procedures to achieve comparable final SFR. PMID: 32509870 [PubMed - in process]
Source: Biomed Res - Category: Research Authors: Tags: Biomed Res Int Source Type: research
Conclusions: US-guided MPCNL showed an excellent SFR and low complication rate in the management of pediatric patients with upper ureteral and renal stones. PMID: 32401098 [PubMed - as supplied by publisher]
Source: Journal of Investigative Surgery - Category: Surgery Tags: J Invest Surg Source Type: research
We report on two cases treated with our standardized laparoscopic technique using only three 5-mm trocars. The proposed approach could be considered as the first-line treatment for RCU. [...] Georg Thieme Verlag KG Stuttgart · New YorkArticle in Thieme eJournals: Table of contents  |  Abstract  |  open access Full text
Source: European Journal of Pediatric Surgery Reports - Category: Surgery Authors: Tags: Case Report Source Type: research
CONCLUSION: PI-DJS during PCNL allowed for a reliable and stable reflux from the bladder into the renal pelvis to produce an artificial hydronephrosis without the formation of microbubbles, unlike conventional ureteral catheters. PMID: 32309876 [PubMed - as supplied by publisher]
Source: Urology Journal - Category: Urology & Nephrology Authors: Tags: Urol J Source Type: research
AbstractThe aim of the study was to analyze the factors predicting success for the treatment of proximal ureteral stones larger than 1  cm with extracorporeal shockwave lithotripsy (SWL) in adult patients. Between January 2014 and December 2018, 480 adult patients in total underwent SWL and data were retrospectively evaluated. Patients with multiple ureteral stones, solitary kidney, congenital abnormality, skeletal system abnormal ity, history of previous urinary system surgery and SWL, renal insufficiency, patients who could not tolerate SWL and pediatric patients were excluded from the study. The remaining 415 patie...
Source: Urolithiasis - Category: Urology & Nephrology Source Type: research
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