Abstract:
BACKGROUND AND PURPOSE:Holmium:yttrium-aluminum-garnet (Ho:YAG) laser lithotripsy is the standard lithotrite in ureteroscopy. We investigated the influence of pulse frequency, energy and length on the fragmentation efficiency of Ho:YAG laser lithotripsy in non-floating artificial stones in vitro. MATERIALS AND METHODS:Stone fragmentation efficiency of three different Ho:YAG laser devices were evaluated in vitro at different pulse energy (1.0 and 2.0 J) and frequency settings (5 and 10 Hz), resulting in a standardized output power of 10W, respectively. Where possible, pulse length was modified (350 vs 700 microsec). Each setting was performed with a 273 microm and a 365 microm fiber. Lithotripsy was conducted using non-repulsive stones consisting of soft stone (plaster of Paris) and hard stone composition (Fujirock type 4). RESULTS:Our results showed an increased stone disintegration efficiency at higher pulse energy (2.0 J/5 Hz vs 1.0 J/10 Hz) independently of two fiber diameters and stone types applied in this study (P < 0.05 in 18 of 20 groups). Similarly, reduction of the pulse length from 700 to 350 microsec resulted in a higher stone disintegration (P < 0.05 in 13 of 16 groups). This effect was most prominent when applied to soft stones. Higher fiber diameter was not constantly associated with an increase in stone disintegration. CONCLUSION:We demonstrate that an increase of pulse energy and a reduction of pulse length at a standardized output power of 10W can improve Ho:YAG laser fragmentation efficiency in vitro in nonfloating stones. These results may potentially affect clinical practice of Ho:YAG laser lithotripsy in impacted or large stones, when retropulsion is excluded.
journal_name
J Endouroljournal_title
Journal of endourologyauthors
Wezel F,Häcker A,Gross AJ,Michel MS,Bach Tdoi
10.1089/end.2010.0115subject
Has Abstractpub_date
2010-07-01 00:00:00pages
1135-40issue
7eissn
0892-7790issn
1557-900Xjournal_volume
24pub_type
杂志文章abstract:BACKGROUND AND PURPOSE:Vascular control is an important step in laparoscopic nephrectomy. The various options are titanium clips, Hem-o-lok clips (Weck Closure Systems, Research Triangle Park, NC), T-knot, and stapling devices. We report our experience with the use of Hem-o-lok clips. PATIENTS AND METHODS:From January...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.20.202
更新日期:2006-03-01 00:00:00
abstract:PURPOSE:To evaluate the utility of two ipsilateral ureteral stents placed for benign and malignant ureteral obstruction. METHODS:We performed a retrospective analysis of all cases of tandem ureteral stent (TUS) insertion at our institution from July 2007 through January 2013. Student t, Fisher exact, and log-rank test...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2013.0281
更新日期:2013-10-01 00:00:00
abstract:BACKGROUND AND PURPOSE:The optimal treatment option for ureteral calculi is a controversial issue. In this study, we present our experience of 60 patients, divided into three groups, who were treated using open surgery, laparoscopic surgery, or transureteral lithotripsy (TUL). PATIENTS AND METHODS:We enrolled 60 patie...
journal_title:Journal of endourology
pub_type: 临床试验,杂志文章
doi:10.1089/end.2010.0344
更新日期:2011-01-01 00:00:00
abstract:INTRODUCTION:Recent evidence would suggest a low rate of metabolic assessment in stone formers, even in those deemed as high risk. We wished to assess the attitudes and practice patterns of metabolic work up in North American members of the Endourological Society as part of the management of stone-forming patients. ME...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2015.0207
更新日期:2016-04-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to determine the efficacy of short-duration use of finasteride and dutasteride before transurethral resection of the prostate (TURP) on intraoperative blood loss and microvessel density (MVD) of prostate stroma and suburethral tissues in benign prostatic hyperplasia (BPH). METHODS:T...
journal_title:Journal of endourology
pub_type: 杂志文章,随机对照试验
doi:10.1089/end.2016.0696-rev
更新日期:2017-09-01 00:00:00
abstract:OBJECTIVES:To determine predictors of fluoroscopy time (FT) during percutaneous nephrolithotomy (PCNL) and assess the impact of urology postgraduate trainees (PGTs) and S.T.O.N.E. nephrolithometry score. METHODS:A retrospective review of patients undergoing PCNL between 2010 and 2013 at a tertiary healthcare center wa...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2014.0800
更新日期:2015-05-01 00:00:00
abstract::The long-term effects of extracorporeal shockwave lithotripsy (SWL) on children treated for renal calculi are unclear. To study the effects on the immature animal, we evaluated 31 Wistar white rats that underwent right nephrectomy at 30 days of age. At 40 days of age they were divided into three groups: a control grou...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1995.9.45
更新日期:1995-02-01 00:00:00
abstract:BACKGROUND AND PURPOSE:We present the role of the transportal technique of laparoscopy-assisted surgeries.This report highlights the advantages of transportal technique over pure laparoscopic surgeries and laparoscopy-assisted surgeries. PATIENTS AND METHODS:In the last 3 years, we have adopted this approach for six p...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2008.0209
更新日期:2008-12-01 00:00:00
abstract::To assess the durability of the results of transurethral microwave thermotherapy (TUMT) for symptomatic benign prostatic hyperplasia (BPH), we have reviewed publications describing trials with at least 3 years of follow-up. For men treated only by TUMT, improvement in symptoms and quality of life appears to be maintai...
journal_title:Journal of endourology
pub_type: 杂志文章,meta分析
doi:10.1089/end.2000.14.671
更新日期:2000-10-01 00:00:00
abstract:PURPOSE:To define factors associated with the failure of shockwave lithotripsy (SWL) in the treatment of ureteral stones. PATIENTS AND METHODS:We retrospectively studied 405 men and 283 women (mean age 52.6 years) who underwent SWL with a second-generation lithotripter in the period 1994 to 2001. We evaluated availabl...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/089277903765444302
更新日期:2003-05-01 00:00:00
abstract:PURPOSE:To evaluate the safety and oncologic efficacy of extravesical laparoscopic stapling of the distal ureter and bladder cuff during nephroureterectomy for pelvicaliceal transitional-cell carcinoma (TCC). PATIENTS AND METHODS:Patients with primary pelvicaliceal TCC and no history of TCC of the bladder or ureter wh...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.0306
更新日期:2007-09-01 00:00:00
abstract:PURPOSE:To determine the effects of previous open nephrolithotomy on the results and morbidity of subsequent percutaneous nephrolithotomy (PCNL). PATIENTS AND METHODS:Between March 2005 and January 2006, 89 patients underwent PCNL at our institution. We compared the patients who had had previous open surgery on the sa...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.0293
更新日期:2007-04-01 00:00:00
abstract:INTRODUCTION:Ureteroscopy is one of the therapeutic options in the management of urinary stone disease in children. Previous literature has described ureteroscopy primarily in mid to distal ureteral calculi. We report our experience with flexible ureteroscopy in the management of upper ureteral calculi. PATIENTS AND M...
journal_title:Journal of endourology
pub_type: 临床试验,杂志文章
doi:10.1089/end.2010.0307
更新日期:2011-04-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Laparoscopic radical cystectomy is confined to centers where advanced laparoscopy is performed, and its role is not yet well clear. Our aim was to evaluate, through a prospective comparative study, the advantages of the laparoscopic compared with an open approach. PATIENTS AND METHODS:From Novem...
journal_title:Journal of endourology
pub_type: 临床试验,杂志文章
doi:10.1089/end.2006.0224
更新日期:2007-03-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Bacterial colonization of indwelling ureteral stents may serve as a nidus for bacteriuria in operations where stents are manipulated. The predictive value of urine cultures in the assessment of stent colonization was examined in 65 patients with indwelling ureteral stents. PATIENTS AND METHODS:P...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1999.13.735
更新日期:1999-12-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Several experienced practitioners of open surgery with limited or no laparoscopic background have adopted robot-assisted laparoscopic radical prostatectomy (RLRP) as an alternative to open radical prostatectomy (RRP), demonstrating outcomes comparable to those in large RRP and laparoscopic prosta...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.0239
更新日期:2007-04-01 00:00:00
abstract:OBJECTIVES:To determine the accuracy of the surgeon's impression as to the stone-free rate at the end of percutaneous nephrolithotomy (PCNL), and to evaluate predictors for inaccurate estimation. MATERIALS AND METHODS:A prospective study conducted between 2010 and 2015. Surgeon's impression, categorized as "insignific...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2018.0005
更新日期:2018-06-01 00:00:00
abstract::Myelomeningocele (MMC) is characterized by paraplegia and incontinence, often necessitating surgery. Current models of MMC in sheep and primates create a spinal defect long after anomalous neural tube closure ordinarily occurs. An ideal model of MMC would allow creation of the defect at the earliest age in a low-cost ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1998.12.199
更新日期:1998-04-01 00:00:00
abstract:PURPOSE:To assess factors that affect prostate biopsy results following salvage whole gland cryoablation. PATIENTS AND METHODS:One hundred seventy-four patients underwent prostate biopsy following salvage whole gland cryoablation of the prostate in the Cryo-OnLine Database registry. Wilcoxon rank-sum and χ2 tests and ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2016.0715
更新日期:2017-05-01 00:00:00
abstract:INTRODUCTION:Routine preoperative electrocardiogram (ECG) before shockwave lithotripsy (SWL) is frequently performed despite recommendations against its use in asymptomatic patients undergoing low-risk surgical procedures. This study assesses whether routine preoperative ECG before SWL is useful in patients at low risk...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2019.0053
更新日期:2019-04-01 00:00:00
abstract:PURPOSE:To assess the necessity of placing a ureteral stent after transperitoneal laparoscopic ureterolithotomy (TPLU). PATIENTS AND METHODS:In the period from May 2006 to November 2010, 46 patients underwent TPLU. There were 13 females and 33 males. All patients had an impacted stone larger than 1.5 cm in the upper a...
journal_title:Journal of endourology
pub_type: 临床试验,杂志文章
doi:10.1089/end.2012.0082
更新日期:2012-09-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Recent advances in endoscopy have enabled microscopic imaging of live bladdercancer cells in situ. The newly developed Endocystoscopy system (Olympus Medical Systems Co., Tokyo, Japan) is a flexible digital endoscope that has more than a 450-fold magnifying power on a video monitor. PATIENTS AND...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.20.698
更新日期:2006-09-01 00:00:00
abstract::Percutaneous renal access is an integral step in percutaneous renal drainage and percutaneous nephrolithotomy. Urologists are increasingly obtaining access themselves, as this eliminates reliance on a second "surgeon" and increases flexibility with respect to procedure timing and the location of the access tract. Surp...
journal_title:Journal of endourology
pub_type: 杂志文章,评审
doi:10.1089/end.2007.9981
更新日期:2007-03-01 00:00:00
abstract:BACKGROUND AND PURPOSE:There is a continuing reluctance among transplant surgeons to procure a right-kidney allograft laparoscopically. We describe our experience with right laparoscopic donor nephrectomy (RLDN) by three techniques. PATIENTS AND METHODS:We retrospectively analyzed all seven RLDNs performed at our cent...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.20.309
更新日期:2006-05-01 00:00:00
abstract::Since the advantages of using ureteral stents in conjunction with extracorporeal shock wave lithotripsy were first recognized, the growing demand for outpatient stone treatment has made stent use much more frequent. However, prophylactic stent placement must be judicious to maximize success and minimize associated mor...
journal_title:Journal of endourology
pub_type: 杂志文章,评审
doi:10.1089/end.1993.7.155
更新日期:1993-04-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Ascertaining the optimal depth of dilator progression is a crucial factor during tract dilation in percutaneous nephrolithotomy. Dilation is generally guided under fluoroscopy, ultrasonography, or combination of both techniques, and it is still difficult to prevent overdilation causing perforatio...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2012.0710
更新日期:2013-07-01 00:00:00
abstract:AIM:To evaluate whether the overall safety and efficacy profile of percutaneous surgery for urinary stone disease in older (>70 years) patients might influence the decision for the procedure in the elderly. MATERIALS AND METHODS:A large database was created from our patients (n = 1058) who underwent percutaneous surge...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2007.0432
更新日期:2008-09-01 00:00:00
abstract:: Purpose: Photoselective vaporization of the prostate (PVP) with a 940-nm diode laser is an option for treating symptoms caused by benign prostatic hyperplasia (BPH). Here, we present our experience using this technology. Methods: ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2019.0311
更新日期:2019-12-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Various laparoscopic devices have been described for suture anchoring during solidorgan parenchymal closure. Application of these devices expedites the closure of parenchymal defects and minimizes ischemia time. We compared different technologies as suture anchors for parenchymal closure. MATERI...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2005.19.1221
更新日期:2005-12-01 00:00:00
abstract:PURPOSE:We evaluated complications of urologic laparoscopic surgery at our institution. PATIENTS AND METHODS:From December 1991 to January 2009, 1017 urologic laparoscopic surgical procedures were performed in Kansai Medical University, including 277 radical prostatectomies, 13 donor nephrectomies, 74 partial nephrect...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2009.0322
更新日期:2010-02-01 00:00:00