Ureteral catheterization in uncomplicated ureterolithotripsy: a randomized, controlled trial.
ABSTRACT To evaluate short-term ureteral catheterization in patients undergoing ureteroscopic lithotripsy for ureteral calculi.
Patients (n = 140) with ureteral calculi who were candidates for ureterolithotripsy were enrolled. Stone size was 5-10mm. The operation was performed with an 8-9.8F semirigid ureteroscope without active dilatation and stones were fragmented with a 1F pneumatic lithotrite. Uncomplicated cases (109 patients) were randomized to catheterized (C) and noncatheterized (NC) groups. In the 54 C group patients, a polyurethane catheter (5F) was passed through the ureter after lithotripsy with the end attached to a Foley placed in urethra, which was removed after 24h. Postoperatively, all patients were evaluated for flank and suprapubic pain, renal colic, irritative urinary symptoms, peritonism, frequency of analgesic usage, urinary tract infection, duration of hospitalization, postdischarge visits (due to renal colic/pain), readmission, and residual stone rates.
On the first postoperative day, the percentage of patients experiencing flank pain and renal colic was significantly higher in the NC group (76% and 45%) compared with the C group (20% and 2%); 67% of NC patients required analgesic administration during hospital stay versus 20% of C patients (p<0.001). Suprapubic pain and urethral irritation were reported by 13% and 37% of C patients, respectively, and 5% and 4% of NC patients. However, peritonism was developed more often in NC patients (27% vs. 13%). Hospital stay was 1 d for all patients. Three days postoperatively, 40% of NC patients complained of at least one episode of flank pain compared with 7% of C patients (p<0.001). Incidence of urinary tract infections was 4% in NC and 7% in C group patients. Postdischarge visits were necessary in 20% of NC patients and 5% of C patients. No patient in either group required readmission. No complaints were reported nor residual stones discovered on 2-wk follow-up radiographs in either group.
Short-term ureteral catheterization in uncomplicated ureteroscopy and lithotripsy has a role in reducing early postoperative morbidities. It may also decrease pain and colic after discharge.
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ABSTRACT: In this paper we present a stochastic model for daily average temperature. The model contains seasonality, a low-order autoregressive component and a variance describing the heteroskedastic residuals. The model is estimated on daily average temperature records from Stockholm (Sweden). By comparing the proposed model with the popular model of Campbell and Diebold (2005), we point out some important issues to be addressed when modelling the temperature for application in weather derivatives market.Energy Economics - ENERG ECON. 01/2012;
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ABSTRACT: Abstract Background and Purpose: Objective parameters for the classification of ureteral injuries and resulting indications for ureteral stent placement after ureteroscopy are lacking. We hereby present a new classification system including proof of interrater reliability and validation of recommendations for postoperative ureteral stent placement. Patients and Methods: The Postureteroscopic Lesion Scale (PULS) was applied in 435 patients undergoing ureteroscopy. Interrater reliability between three surgeons (junior resident, senior resident, and specialist) was evaluated in 112 patients. Postoperative ureteral stent placement was performed according to PULS. For follow-up with ultrasonography, we assumed hydronephrosis to be an indirect sign for significant postoperative ureteral obstruction. Results: No ureteral lesion was seen in 46.2% of patients (grade 0). A grade 1, 2, or 3 lesion was seen in 30.8%, 19.1%, and 3.9% of patients, respectively. No grade 4 or 5 lesions were observed in our series. Interrater reliability was high (Kendall W=0.91; mean Spearman Rho=0.86). This was particularly true between senior resident and specialist (Rho=0.95), compared with junior resident and senior resident or specialist (Rho=0.83, Rho=0.79, respectively). All patients with documented lesions had a Double-J stent placed. Indwelling time varied according to PULS. Results of a postoperative ultrasonographic follow-up could be obtained in 95.6% of cases. No patient showed clinical or sonographic signs of upper urinary tract obstruction. Conclusions: According to these preliminary data for the clinical application of PULS, interrater reliability is high. Standardized empiric recommendations for the use and duration of postoperative stent placement after ureteroscopy might be useful in guiding urologists in this conversely discussed issue, ultimately preventing ureteral strictures as a late complication of ureteroscopy. These will have to be confirmed, however, by controlled trials in the future.Journal of endourology / Endourological Society 06/2012; · 1.75 Impact Factor
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ABSTRACT: Purpose: Emergency double-J (DJ) stenting following ″uncomplicated″ ureteroscopic (UURS) stone treatment is both morbid and costly. Our study aims at identifying those patients who are more likely to require such an extra procedure. Handling of this complication will also be highlighted. Materials and Methods: 319 cases of UURS cases were selected out of 903 patients, who were admitted for URS stone treatment at King Abdullah University Hospital during the period from May, 2003 to December, 2010. Thirty-eight of them (11.9%) had emergency post-URS DJ stenting within 24 hours of discharge. The medical records of all UURS cases were retrospectively reviewed. Comparison in demographic and stone-related variables was made using 2-paired t-test with P < 0.05. Operative findings of 38 stented patients were outlined. Results: Significant risk factors for emergency stenting were noted in males with larger (> 1.5 cm) and proximal stones (38 stented vs. 281 unstented). Operative risk factors among the 38 patients were: initial procedure time > 45 minutes (42.1%), ureteral wall edema (21.1%), repeated access for stones > 1.5 cm (21.1%), impacted stone (10.5%) and ignored or missed stones/fragments (4.6%). Conclusions: The need for emergency DJ stenting following UURS stone treatment is not uncommon. The routine insertion is impractical and weakly-supported. With risk-factor stratification, selective and individualized DJ stenting policy is recommended.International braz j urol: official journal of the Brazilian Society of Urology 04/2013; 39(2):203-208.