Factors that affect Stone Free Rate in flexible ureteroscopy in large renal calculi lithotripsy

2018 ◽  
Vol 17 (4) ◽  
pp. e2016
Author(s):  
G. Dellis ◽  
E. Patili ◽  
J. Varkarakis ◽  
A. Papatsoris ◽  
M. Berdebes ◽  
...  
Keyword(s):  
Renal Calculi ◽  
Flexible Ureteroscopy ◽  
Stone Free Rate ◽  
Free Rate

scholarly journals Flexible ureteroscopy for renal stone without preoperative ureteral stenting shows good prognosis

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2728 ◽  
Author(s):  
Jiaqiao Zhang ◽  
Chuou Xu ◽  
Deng He ◽  
Yuchao Lu ◽  
Henglong Hu ◽  
...  
Keyword(s):  
Renal Stone ◽  
Operation Time ◽  
Renal Stones ◽  
Renal Calculi ◽  
Good Prognosis ◽  
Flexible Ureteroscopy ◽  
Stone Free Rate ◽  
Ureteral Stenting ◽  
Free Rate

Purpose To clarify the outcome of flexible ureteroscopy (fURS) for management of renal calculi without preoperative stenting. Methods A total of 171 patients who received 176 fURS procedures for unilateral renal stones were reviewed. All procedures were divided into two groups depending on whether they received ureteral stenting preoperatively. Baseline characteristics of patients, stone burden, operation time, stone-free rates, and complications were compared between both groups. Results Successful primary access to the renal pelvis was achieved in 104 of 114 (91.2%) patients without preoperative stenting, while all procedures with preoperative stenting (n = 62) were successfully performed. A total of 156 procedures were included for further data analysis (56 procedures in stenting group and 100 in non-stenting group). No significant differences was found regardless of a preoperative stent placement in terms of stone-free rate (73.2% with stenting vs. 71.0% without, P = 0.854), operative time (70.4 ± 32.8 with stenting vs. 70.2 ± 32.1 without, P = 0.969). Conclusions fURS for management of renal stone without preoperative ureteral stenting are associated with well outcome in short term follow-up. Our study may help patients and doctors to decide if an optional stent is placed or not.

scholarly journals Improved effectiveness and safety of flexible ureteroscopy for renal calculi (<2 cm): A retrospective study

2015 ◽  
Vol 9 (5-6) ◽  
pp. 273 ◽  
Author(s):  
Shuqiu Chen ◽  
Bin Xu ◽  
Ning Liu ◽  
Hua Jiang ◽  
Xiaowen Zhang ◽  
...  
Keyword(s):  
Success Rate ◽  
Preoperative Evaluation ◽  
Surgical Techniques ◽  
Renal Calculi ◽  
Flexible Ureteroscopy ◽  
Efficacy And Safety ◽  
Stone Free Rate ◽  
Prevention And Treatment ◽  
Post Operation ◽  
Free Rate

Introduction: We discuss the efficacy and safety of flexible ureteroscopy for renal calculi with a burden of <2 cm, as well as the prevention and treatment of complications.Methods: A total of 108 renal calculi with flexible ureteroscopy and holmium laser treatment were retrospectively analyzed. The stone-free rate was evaluated. The effectiveness, safety, surgical technique, incidence of complications, and relevant treatments were analyzed.Results: All patients underwent only one lithotripsy procedure. The success rate of flexible ureteroscopy was 97.2% (105/108). Among the 105 cases, the total lithotripsy success rate was 97.1% (101/105). The total stone-free rate after 8 weeks post-operation was 94.3% (99/105), the stone-free rate of the lower calyx was 85.7% (30/35); it was 98.6% (69/70) in the middle‒upper calyceal and renal pelvis. The incidence of complications was 12.9% (14/108). None of the patients had serious adverse outcomes.Conclusion: Flexible ureteroscopy represents an optimal treatment option for selected renal calculi with burden of <2 cm. The effectiveness and safety of flexible ureteroscopy can be further improved through reasonable preoperative evaluation and advances in surgical techniques, as well as a better understanding of the inducement and treatment of complications.

Efficacy of flexible ureteroscopy and laser lithotripsy for lower pole renal calculi

2014 ◽  
Vol 7 (6) ◽  
pp. 389-393 ◽  
Author(s):  
A Sahai ◽  
F Khan ◽  
F Anjum ◽  
IK Dickinson ◽  
H Marsh ◽  
...  
Keyword(s):  
Renal Calculi ◽  
Laser Lithotripsy ◽  
Flexible Ureteroscopy ◽  
Lower Pole ◽  
Invasive Treatment ◽  
Flexible Ureterorenoscopy ◽  
Stone Free Rate ◽  
Operation Rate ◽  
The Mean ◽  
Free Rate

Objective: Our aim was to determine whether flexible ureterorenoscopy and laser lithotripsy is efficacious and safe in treating lower pole renal calculi. Materials and methods: Patient, procedure and stone data of patients who underwent flexible ureterorenoscopy and laser lithotripsy at our referral centre were collected prospectively between November 2005 and November 2011 and entered into a designated database. In all, 242 procedures were performed in 198 patients. Results: The mean age was 51.2 years. The mean calculi size was 10.51 mm (range 4–27 mm). Thirty seven patients had more than one stone in the lower pole. An access sheath was used in 19 patients (9.6%), 171 (86.4%) had a ureteric stent inserted after the procedure, and 165 patients had a single procedure. Re-operation rate was 16.7%. Stone-free rates after one procedure were 89%, 80% and 41%, respectively, for calculi measuring 4–10 mm ( n=107), 11–20 mm ( n=76) and > 20 mm ( n=15). The overall stone-free rate was 83%, 91% and 95% after one, two and three procedures, respectively. Conclusion: Flexible ureterorenoscopy and laser lithotripsy is a safe and effective minimally invasive treatment option for patients with 4–20 mm lower pole calculi. Staged procedures, however, become necessary as the size of the stone increases greater than 20 mm, and this should be mentioned when counselling patients for their primary procedure.

A Novel Clinical-Radiomics Model Preoperatively Predicted the Stone-Free Rate of Flexible Ureteroscopy Strategy in Kidney Stone Patients

2020 ◽  
Author(s):  
Yang Xun ◽  
Mingzhen Chen ◽  
Ping Liang ◽  
Pratik Tripathi ◽  
Huchuan Deng ◽  
...  
Keyword(s):  
Kidney Stone ◽  
Flexible Ureteroscopy ◽  
Stone Free Rate ◽  
Free Rate

scholarly journals Predictors of Success after Extracorporeal Shock Wave Lithotripsy (ESWL) for Renal Calculi Between 20—30 mm: A Multivariate Analysis Model

2006 ◽  
Vol 6 ◽  
pp. 2388-2395 ◽  
Author(s):  
Ahmed El-Assmy ◽  
Ahmed R. El-Nahas ◽  
Mohamed E. Abo-Elghar ◽  
Ibrahim Eraky ◽  
Mahmoud R. El-Kenawy ◽  
...  
Keyword(s):  
Surface Area ◽  
Renal Stones ◽  
Renal Calculi ◽  
Analysis Model ◽  
Stone Surface ◽  
Chi Square ◽  
Renal Anomalies ◽  
Extracorporeal Shock Wave ◽  
Stone Free Rate ◽  
Free Rate

The first-line management of renal stones between 20—30 mm remains controversial. The Extracorporeal Shock Wave Lithotripsy (ESWL) stone-free rates for such patient groups vary widely. The purpose of this study was to define factors that have a significant impact on the stone-free rate after ESWL in such controversial groups. Between January 1990 and January 2004, 594 patients with renal stones 20—30 mm in length underwent ESWL monotherapy. Stone surface area was measured for all stones. The results of treatment were evaluated after 3 months of follow-up. The stone-free rate was correlated with stone and patient characteristics using the Chi-square test; factors found to be significant were further analyzed using multivariate analysis.Repeat ESWL was needed in 56.9% of cases. Post-ESWL complications occurred in 5% of cases and post-ESWL secondary procedures were required in 5.9%. At 3-month follow-up, the overall stone-free rate was 77.2%. Using the Chi-square test, stone surface area, location, number, radiological renal picture, and congenital renal anomalies had a significant impact on the stone-free rate. Multivariate analysis excluded radiological renal picture from the logistic regression model while other factors maintained their statistically significant effect on success rate, indicating that they were independent predictors. A regression analysis model was designed to estimate the probability of stone-free status after ESWL. The sensitivity of the model was 97.4%, the specificity 90%, and the overall accuracy 95.6%.Stone surface area, location, number, and congenital renal anomalies are prognostic predictors determining stone clearance after ESWL of renal calculi of 20—30 mm. High probability of stone clearance is obtained with single stone ≤400 mm2 located in renal pelvis with no congenital anomalies. Our regression model can predict the probability of the success of ESWL in such controversial groups and can define patients who would need other treatment modality.

scholarly journals Flexible ureterorenoscopy in position or fusion anomaly: Is it feasible?

2017 ◽  
Vol 63 (8) ◽  
pp. 685-688 ◽  
Author(s):  
Rafael Haddad Astolfi ◽  
Gustavo Freschi ◽  
Fernando Figueiredo Berti ◽  
Nelson Gattas ◽  
Wilson Rica Molina Junior ◽  
...  
Keyword(s):  
Kidney Stones ◽  
Perioperative Complications ◽  
Horseshoe Kidney ◽  
Renal Calculi ◽  
Flexible Ureterorenoscopy ◽  
Renal Anomalies ◽  
Stone Free Rate ◽  
Perioperative Complication ◽  
The Mean ◽  
Free Rate

Summary Objective: To analyze the results of flexible ureterorenoscopy (F-URS) with holmium laser in the treatment of kidney stones with ectopic and fusion anomalies (horseshoe kidney and rotation anomalies). Method: We reviewed data from 13 patients with fusion and ectopic renal anomalies that underwent F-URS from April 2011 to April 2017. We analyzed demographic and clinical data (age, gender, BMI, anatomical abnormality, location and dimension of the renal calculi) and perioperative data (method of treatment, stone-free rate, number of days with DJ catheter and perioperative complications). Results: The mean stone size was 12.23 +/- 5.43 mm (range 6-22mm), located in the inferior (58.33%) and middle (16.76%) calyceal units, renal pelvis (16.67%) and multiple locations (8.33%). All 13 patients were treated with Ho-Yag laser, using dusting technique (25%), fragmentation and extraction of the calculi (58.33%) and mixed technique (16.67%). We did not have any severe perioperative complication. After 90 days, nine patients (75%) were considered stone free. Conclusion: Our data suggest that F-URS is a safe and feasible choice for the treatment of kidney stones in patients with renal ectopic and fusion anomalies.

What is the stone-free rate following flexible ureteroscopy for kidney stones?

2015 ◽  
Vol 12 (5) ◽  
pp. 281-288 ◽  
Author(s):  
Khurshid R. Ghani ◽  
J. Stuart Wolf
Keyword(s):  
Kidney Stones ◽  
Flexible Ureteroscopy ◽  
Stone Free Rate ◽  
Free Rate

scholarly journals Comparison of the Efficacy of ShuoTong Ureteroscopy and Simple Flexible Ureteroscopy in the Treatment of Unilateral Upper Ureteral Calculi

2021 ◽  
Vol 8 ◽  
Author(s):  
Longhui Lai ◽  
Wenzhao Zhang ◽  
Fangjian Zheng ◽  
Tao Wang ◽  
Peide Bai ◽  
...  
Keyword(s):  
Postoperative Complications ◽  
Operative Time ◽  
Ureteral Calculi ◽  
Flexible Ureteroscopy ◽  
Ureteral Stones ◽  
Ureteral Access Sheath ◽  
Hospitalization Cost ◽  
Access Sheath ◽  
Stone Free Rate ◽  
Free Rate

Background: ShuoTong ureteroscopy (Sotn-ureteroscopy, ST-URS), a new lithotripsy operation method developed on the basis of ureteroscopy, is widely used to treat ureteral stones in China. Its composition includes rigid ureteral access sheath, standard mirror, lithotripsy mirror, and ShuoTong perfusion aspirator (ST-APM). Here, we compared the efficacy and safety of the ST-URS and the flexible ureteroscope (F-URS) holmium laser lithotripsy in the treatment of unilateral upper ureteral calculi.Methods: Retrospective analysis was conducted on the clinical data of 280 patients who met the inclusion 1) urinary tract CT was diagnosed with unilateral single upper ureteral calculi above the L4 lumbar spine; 2) patient age was from 18 to 80 years old; 3) patients were informed and consented to this study; and 4) patients were approved by the hospital ethics committee (proof number: KY-2019-020) and the exclusion criteria for unilateral upper ureteral calculi in the First Affiliated Hospital of Xiamen University from January 2018 to November 2020, and they were divided into the ST-URS group and the flexible ureteroscopy (F-URS) group.Results: The stone-free rate of 1 day after operation of the ST-URS group was significantly higher than the F-URS group (63.71 vs. 34.62%, P &lt; 0.0001). The operative time (38.45 vs. 46.18 min, P = 0.005) and hospitalization cost (27,203 vs. 33,220 Yuan, P &lt; 0.0001) of the ST-URS group were significantly lower than the F-URS group. There were no significant differences in the success rate of ureteral access sheath placement, operative blood loss, stone-free rate of 1 month after operation, postoperative complications, postoperative hospital stay, and postoperative visual analog scale (VAS) pain score between the two groups (P &gt; 0.05). In subgroups of a diameter of calculi ≥ 1.5 cm, calculi CT numerical value ≥ 1,000 Hounsfield unit and the preoperative hydronephrosis range ≥ 3.0 cm, ST-URS shows more advantages in the operative time, stone-free rate of 1 day after the operation, the hospitalization cost, and the incidence of postoperative complications.Conclusion: In unilateral upper ureteral stones treated with a holmium laser, compared with the simple F-URS, the ST-URS has a shorter operative time, lower hospitalization cost, and a higher stone-free rate of 1 day after the operation, suggesting that the ST-URS could be more widely applied in clinics.

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