Abstract:
:Using high-speed photography and acoustic emission measurements, we studied the dynamics of a transient cavitation bubble near a stone surface and the concomitant shockwaves generated during electrohydraulic lithotripsy (EHL). At each spark discharge, a vapor plasma and subsequently a cavitation bubble oscillating around the tip of an EHL probe are produced. Simultaneously, three distinctive shockwave pulses are generated. The first shockwave is produced by the rapid expansion of the vapor plasma, while the second and third waves are produced by rebounds of the cavitation bubble. Depending on the proximity of the probe to the stone surface, the collapse of the cavitation bubble may be symmetric, resulting in a strong shockwave emission; or asymmetric, leading to the formation of a liquid jet. For the Nortech AUTOLITH lithotripter with a 1.9F probe that was used in this study, maximum shockwave emission is produced when the probe is about 1 mm from the stone surface, whereas the maximum jet velocity is produced when the probe tip is at distance equivalent to the maximum bubble radius of about 3 mm. These findings are consistent with clinical experience, which suggests that for optimal treatment results, the EHL probe should be placed close to the stone surface.
journal_name
J Endouroljournal_title
Journal of endourologyauthors
Zhong P,Tong HL,Cocks FH,Preminger GMdoi
10.1089/end.1997.11.55subject
Has Abstractpub_date
1997-02-01 00:00:00pages
55-61issue
1eissn
0892-7790issn
1557-900Xjournal_volume
11pub_type
杂志文章abstract::Cold-knife retrograde endopyelotomy is a simple, safe, and effective therapeutic option for primary and secondary symptomatic ureteropelvic junction obstruction (UPJO). Our long-term success rate with negligible complications demonstrates its durability and safety. Retrograde endopyelotomy should be considered a viabl...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2007.9828
更新日期:2008-04-01 00:00:00
abstract:PURPOSE:To describe the surgical technique of robot-assisted sacral colpopexy (RASCP) and to assess its feasibility and safety in a high-volume laparoscopic center. PATIENT AND METHODS:12 women with symptomatic urogenital prolapse with or without concomitant urinary stress incontinence were treated with RASCP by one s...
journal_title:Journal of endourology
pub_type: 临床试验,杂志文章
doi:10.1089/end.2010.0160
更新日期:2010-12-01 00:00:00
abstract::Lasertripsy of upper urinary tract calculi after unsuccessful extracorporeal lithotripsy (SWL) or ureteroscopy (Group 1; N = 26 patients, 36 calculi) was compared with primary lasertripsy (Group 2; N = 56 patients, 79 calculi). Access to calculi was achieved by a Candela miniscope or flexible ureteroscope, and laser f...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1993.7.473
更新日期:1993-12-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Involvement of the bladder is seen in only 1% to 2% of patients with endometriosis. The diagnosis of vesical endometriosis is difficult to formulate, and it should be confirmed by cystoscopy with biopsy. However, this examination is often insufficient because of the submucosal-transmural location...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/089277902761403014
更新日期:2002-11-01 00:00:00
abstract::Vesicoureteral reflux (VUR) in the animal model for experimental purposes can be created either by open transvesical or endoscopic techniques. The concept of reflux creation is the same for both techniques: incision of the roof of the intramural portion of the ureter at the 12 o'clock position. The open method has the...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1998.12.41
更新日期:1998-02-01 00:00:00
abstract::We report the ureteroscopic unroofing of a symptomatic peripelvic cyst with a holmium laser in a 37-year-old woman. At 1-year follow-up, the patient remains symptom free. Endoscopic management of peripelvic cysts is durable and can be performed safely. ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.0469
更新日期:2007-12-01 00:00:00
abstract:PURPOSE:The aim of this study was to assess the metabolic characteristics and risks of stone recurrence in young adult stone patients in Korea. PATIENTS AND METHODS:The medical records of 1532 patients presenting with renal or ureteric stones at our stone clinic between 1994 and 2015 were retrospectively reviewed. Pat...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2017.0210
更新日期:2017-08-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Performance of laparoscopic surgery requires adequate hand-eye coordination. Video games are an effective way to judge one's hand-eye coordination, and practicing these games may improve one's skills. Our goal was to see if there is a correlation between skill in video games and skill in laparosc...
journal_title:Journal of endourology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1089/end.2005.19.372
更新日期:2005-04-01 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::After an extensive favorable experience with the Lapides-Ball open retropubic bladder neck suspension, we chose to perform this operation laparoscopically. We describe video-assisted extraperitoneal laparoscopic bladder neck suspension (VELBNS), in which we employ a single laparoscopic cannula and a laparoscopic bladd...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1995.9.259
更新日期:1995-06-01 00:00:00
abstract::Surgical removal with radical prostatectomy has been a cornerstone for the treatment of prostate cancer and is associated with level 1 evidence for survival advantage compared with watchful waiting. Since the first structured robotic program was launched in 2000, robot-assisted radical prostatectomy (RARP) has had a r...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2016.0585
更新日期:2017-04-01 00:00:00
abstract:BACKGROUND AND PURPOSE:An integral component of many urologic reconstructive surgical procedures is the positioning of a Double-J stent to span the anastomosis. Some surgeons prefer to place a retrograde stent during cystoscopy, either during or after the reconstruction. In this communication, we describe our straightf...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2011.0296
更新日期:2012-09-01 00:00:00
abstract::The appeal of laser therapy is rooted in its absence of complications relative to the gold standard of transurethral electroresection. As in any evaluation of a new medical intervention, efficacy must be weighed against the degree of complications that accompany it. Although there has been a relative paucity of litera...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1995.9.183
更新日期:1995-04-01 00:00:00
abstract:BACKGROUND AND PURPOSE:No literature exists examining the risk factors for failure after robot-assisted laparoscopic pyeloplasty for ureteropelvic junction obstruction (UPJO) in children. The goal of this study was to compare the success of robot-assisted pyeloplasty between UPJO kidneys with preoperative renal functio...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2014.0876
更新日期:2015-08-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Published outcomes of pelvic lymph node dissection (PLND) during robot-assisted laparoscopic prostatectomy (RALP) demonstrate significant variability. The purpose of the study was to compare PLND outcomes in patients at risk for lymph node involvement (LNI) who were undergoing radical prostatecto...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2011.0266
更新日期:2012-06-01 00:00:00
abstract:: Purpose: To report on the safety, technical results, and oncologic outcomes of computed tomography guided percutaneous microwave ablation of stage cT1b renal cell carcinoma. Materials and Methods: This single-center retrospecti...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2020.0382
更新日期:2020-10-01 00:00:00
abstract::During cryotherapy of the prostate, identification of probe tips that are misplaced into the bladder is often not readily apparent via transrectal ultrasonography. Ultimately, cystoscopy is needed to ensure this has not occurred before initiating a freeze. We describe the innovative use of continuous flexible cystosco...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2011.0417
更新日期:2012-04-01 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::Laser systems used for prostatectomy may be right-angle (sidefiring) devices, which are either refractive or reflective, or contact devices. The tissue physics of these systems differ, and as a result, there are very real differences in the optimal exposure techniques. An understanding of the device being used is esse...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1995.9.85
更新日期:1995-04-01 00:00:00
abstract:PURPOSE:We describe and evaluate a new transperineal laparoscopic approach for male patients, designed to facilitate laparoscopic prostatectomy and cystectomy. PATIENTS AND METHODS:We operated on 12 patients. We did three laparoscopic prostatectomies and nine laparoscopic cystectomies. On five, an ileal conduit was ma...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2010.0247
更新日期:2011-04-01 00:00:00
abstract::In cases of advanced urologic malignancies with impairment of renal function secondary to tumor infiltration in high-risk patients, the possibility of performing a laparoscopic instead of an open cutaneous ureterostomy should be considered. We performed laparoscopic cutaneous ureterostomy in three male patients, two w...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1994.8.425
更新日期:1994-12-01 00:00:00
abstract::In this review, a simplified straightforward algorithmic approach to the metabolic evaluation and treatment of the at-risk or recurrent urolithiasis patient is provided. Eight diagnoses and eight therapies are provided, which cover over 95% of renal stone disease. ...
journal_title:Journal of endourology
pub_type: 杂志文章,评审
doi:10.1089/end.2017.0541
更新日期:2018-05-01 00:00:00
abstract:PURPOSE:To determine the effects on semen of extracorporeal shockwave lithotripsy for distal-ureteral stones. PATIENTS AND METHODS:We examined the semen of 62 patients 1 day before and 1 week and 3 months after SWL for distal-ureteral stones. The results were compared with those of 62 patients similarly treated for up...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.20.483
更新日期:2006-07-01 00:00:00
abstract:PURPOSE:This study was to evaluate the effect of intraoperative continuous infusion of dexmedetomidine on intraocular pressure (IOP) in patients undergoing robot-assisted laparoscopic radical prostatectomy (RALRP) in the steep Trendelenburg (ST). MATERIALS AND METHODS:Sixty-eight patients were randomly divided into tw...
journal_title:Journal of endourology
pub_type: 杂志文章,随机对照试验
doi:10.1089/end.2014.0381
更新日期:2015-03-01 00:00:00
abstract:PURPOSE:The aim of this study is to assess the effectiveness, safety, and reproducibility of the micro-ureteroscopy (m-URS) in the treatment of distal ureteral stones in women. MATERIALS AND METHODS:A multicenter, prospective observational study was designed and conducted between March and December 2015. We included w...
journal_title:Journal of endourology
pub_type: 杂志文章,多中心研究
doi:10.1089/end.2016.0503
更新日期:2016-11-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Comprehensive metabolic evaluation has become an important aspect of the management of recurrent nephrolithiasis, yet the role of stone analysis is often neglected or perhaps underestimated. The purpose of this study was to determine the role of stone analysis in medical decision making in patien...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/089277901750134548
更新日期:2001-03-01 00:00:00
abstract:PURPOSE:To report our experience with congenital inferior vena cava (IVC) anomalies found during laparoscopic retroperitoneal lymph node dissection (LRPLND). PATIENTS AND METHODS:Two men with a mean age of 31.5 years (range 26-37 years) underwent LRPLND because of nonseminomatous germ-cell tumors (NSGCT) between Decem...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2007.0112
更新日期:2008-02-01 00:00:00
abstract::The preliminary experience with 64 patients who have undergone HoLEP combined with intravesical morcellation is presented. The mean preoperative prostate volume was 75.3 cc. The mean laser time was 46.9 minutes and the morcellator time a further 10.5 minutes. A mean total of 35.5 g of tissue was obtained, and 93% of t...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1998.12.457
更新日期:1998-10-01 00:00:00
abstract::The indications, instrumentation, surgical technique, and complications of laparoendoscopic single-site radical nephrectomy (LESS-RN) are being described in detail in an attempt to familiarize urologists with this novel laparoscopic technique. Our initial experience of 30 consecutive cases of LESS-RN is reported. The ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2010.0673
更新日期:2011-02-01 00:00:00
abstract::The authors have developed an ultrasonic aspirator to assist in urologic endoscopic surgery. It appeared that ultrasonic aspiration of bladder tumors was clinically efficient in transurethral surgery. Tumors 1 to 2 cm in diameter could be aspirated completely with this instrument alone. The application of the ultrason...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1994.8.285
更新日期:1994-08-01 00:00:00