Abstract:
BACKGROUND AND PURPOSE:To provide a realistic experience of lower urinary tract endoscopic procedures, we have developed and continue to expand a computer-based surgical simulator that incorporates a surgical tool interface with anatomic detail and haptic feedback. METHODS:Surface-based geometric data for the lower urinary tract were generated from the National Library of Medicine Visible Human dataset. The three-dimensional texture map of the surface geometry was developed from recorded endoscopic video procedures. Geometry and associated texture maps were rendered in real time using the Silicon Graphics Extreme Impacts program. The surgical interface device incorporated all normal ranges of motion and resistance that occur within an actual operative environment. The hands-on endoscopic device attached to the interface device was provided by Circon-ACMI, Inc. Urologic residents evaluated the program for correlation with actual endoscopic procedures. RESULTS:Texture-mapped digitized images provided a close anatomic similarity to actual videoendoscopic images. Virtual endoscopy of the lower urinary tract was reproducible and closely simulated actual visual and tactile endoscopic experience. CONCLUSIONS:Virtual reality surgical simulation is feasible for a variety of lower urinary tract procedures. This system coordinates visual perception with appropriate haptic feedback in both longitudinal and rotational axes. These types of procedures may be incorporated into future educational experiences for urologists to introduce new techniques and to provide documentation of surgical experience.
journal_name
J Endouroljournal_title
Journal of endourologyauthors
Manyak MJ,Santangelo K,Hahn J,Kaufman R,Carleton T,Hua XC,Walsh RJdoi
10.1089/089277902753716179subject
Has Abstractpub_date
2002-04-01 00:00:00pages
185-90issue
3eissn
0892-7790issn
1557-900Xjournal_volume
16pub_type
杂志文章abstract:INTRODUCTION AND OBJECTIVES:To examine the association of glycemic control, including strict glycemic control, with 24-hour urine risk factors for uric acid and calcium calculi. MATERIALS AND METHODS:With institutional review board (IRB) approval, we identified 183 stone formers (SFs) with 459 twenty-four-hour urine c...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2018.0376
更新日期:2018-08-01 00:00:00
abstract:BACKGROUND:To investigate perioperative outcomes, the learning curve, and 2-year follow-up after transurethral enucleation with bipolar (TUEB) for patients with benign prostatic hyperplasia (BPH). METHODS:From December 2011 to October 2016, 603 consecutive patients underwent TUEB for BPH, performed by a single surgeon...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2017.0092
更新日期:2017-07-01 00:00:00
abstract:INTRODUCTION:Laparoscopic partial nephrectomy (LPN) has not received widespread clinical application because of its technical challenge. Bovine serum albumin glutaraldehyde (BSAG) is a hemostatic agent that is independent of the clotting cascade. We evaluated the use of BSAG as the sole agent for parenchymal and collec...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2009.0200
更新日期:2010-03-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Although ultrasonography-guided percutaneous nephrostomy is relatively safe, a number of factors make it challenging for inexperienced operators. A computerized needle navigation technique using tracked ultrasonography snapshots was investigated to determine whether performance of percutaneous ne...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2014.0011
更新日期:2014-09-01 00:00:00
abstract:BACKGROUND AND PURPOSE:As life expectancy continues to increase, we will be faced with the need to counsel older patients on the risks and benefits of undergoing surgery. It is clear that laparoscopic renal surgery has significant benefits over open renal surgery. However, contemporary data on whether these benefits ca...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2007.9885
更新日期:2007-11-01 00:00:00
abstract:PURPOSE:Robot-assisted laparoscopic prostatectomy (RALP) is an increasingly popular treatment choice among men with clinically localized prostate cancer and has resulted in the need to adequately train urologists to perform the procedure. We reviewed the City of Hope experience to determine if the extent of fellow invo...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2008.0378
更新日期:2009-02-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Benign prostatic hyperplasia (BPH) affects more than 50% of men by the age of 60 and 90% by age 85. Many of these men are not candidates for surgical procedures such as transurethral resection of the prostate (TURP), stimulating the development of less-invasive forms of therapy. We studied the ut...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2005.19.159
更新日期:2005-03-01 00:00:00
abstract::This review focuses on the biomaterials used in urology, in particular, the properties of urethral catheters and ureteral stents currently being used in clinical practice. The importance of biomaterial type, biocompatibility, and encrustations are discussed and explained. Current management of bacterial infection and ...
journal_title:Journal of endourology
pub_type: 杂志文章,评审
doi:10.1089/end.1998.12.493
更新日期:1998-12-01 00:00:00
abstract:PURPOSE:To examine the incidence of urinary tract infection (UTI) after flexible cystoscopy (FC) and determine whether prophylactic norfloxacin reduces this incidence compared with placebo. PATIENTS AND METHODS:A double-blind trial was performed, randomizing 234 patients to either 400 mg of norfloxacin or placebo prio...
journal_title:Journal of endourology
pub_type: 杂志文章,随机对照试验
doi:10.1089/end.2005.19.1006
更新日期:2005-10-01 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::We describe a novel use of near-infrared fluorescence (NIRF) imaging without contrast agents, like indocyanine green, to identify otherwise obscured intraluminal areas of interest during robot-assisted laparoscopic (RAL) surgery marked by the white light (WL) of endoscopic instruments. By filtering light wavelengths b...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2013.0606
更新日期:2014-05-01 00:00:00
abstract:OBJECTIVES:Vesicovaginal fistula (VVF) is a common condition that physically and mentally debilitates the patient. In the developing countries such as India, it results mainly due to neglected obstetric care. Options for surgical repair of VVF consist of transvaginal, transvesical, laparoscopic repair. Endoscopic manag...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2009.0557
更新日期:2010-10-01 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:INTRODUCTION:Partial or complete obstruction of the urinary tract is a common and challenging urological condition that may occur in patients of any age. Serum creatinine is the most commonly used method to evaluate global renal function, although it has low sensitivity for early changes in the glomerular filtration ra...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2016.0215
更新日期:2017-02-01 00:00:00
abstract:BACKGROUND AND PURPOSE:In laparoscopy, the term "mirror imaging" is used to describe a visual illusion resulting in paradoxical movements when a surgeon is positioned opposite the laparoscope. Mirror imaging is a common problem, creating difficulty in ergonomics and task performance. We introduce the use of a video ima...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/089277903322145521
更新日期:2003-06-01 00:00:00
abstract::We describe flexible ureteroscopy-directed retrograde nephrostomy access using a puncture wire to achieve renal access. This is a natural extension of modern retrograde intrarenal surgical techniques and a modernization of the original Lawson technique for retrograde nephrostomy tract creation. In appropriately select...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2012.0160
更新日期:2012-10-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Adequate urine production and excretion may be important for clearance of stone fragments after extracorporeal shockwave lithotripsy (SWL). This study evaluated the impact of renal function, measured by preoperative serum creatinine concentration, on the efficacy of SWL. PATIENTS AND METHODS:Fro...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.0319
更新日期:2007-05-01 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: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:BACKGROUND AND PURPOSE:To assess the feasibility and efficacy of percutaneous nephrolithotomy (PCNL) in patients with spinal deformities. PATIENTS AND METHODS:Between 1999 and 2008, eight patients (nine renal units) with spinal deformities underwent 10 PCNLs. Mean stone burden was 372 mm(2) (160-840 mm(2)). Preoperati...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2010.0095
更新日期:2010-07-01 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: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::Extravesical robotic-assisted laparoscopic ureteral reimplantation in children is a challenging procedure. Our top-down suturing technique facilitates this reconstructive surgery. After mobilization of the ureter without the use of ureteral stent placement, the detrusor muscle is divided. Once adequate muscle flaps ar...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2014.0815
更新日期:2015-08-01 00:00:00
abstract:PURPOSE:We report our initial experience with robot-assisted laparoscopic neurovascular bundle (NVB) sparing radical cystoprostatectomy (RALRC), bilateral extended lymph node dissection (BELND) with intracorporeal Studer pouch construction for invasive bladder cancer. PATIENTS AND METHODS:After initially performing >5...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2010.0632
更新日期:2011-09-01 00:00:00
abstract:INTRODUCTION:The gold standard treatment for upper tract urothelial carcinoma (UTUC) is radical nephroureterectomy (RNU). The role of endoscopic resection is limited to low-risk patients. In this study, we present our 30-year experience in the endoscopic management of UTUC. METHODS:In this retrospective study, we iden...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2015.0248
更新日期:2016-03-01 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:BACKGROUND AND PURPOSE:Innovations in minimally invasive surgery have led to the proposal of incision-free natural orifice translumenal endoscopic surgery (NOTES). The purpose of this manuscript is to describe the initial technique of natural orifice translumenal endoscopic surgical radical prostatectomy (NOTES-RP). M...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2008.0670
更新日期:2009-04-01 00:00:00
abstract:PURPOSE:To assess the accuracy of prostate histoscanning (PHS) for spatial detection and localization of prostate cancer (PCa). PATIENTS AND METHODS:Prospective, single center study from January to September 2012 was conducted. Inclusion criterion was biopsy confirmed PCa in patients scheduled for radical prostatectom...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2013.0419
更新日期:2014-03-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Clinically significant post-transplantation lymphoceles are not uncommon. Surgical marsupialization with internal peritoneal drainage is the treatment of choice. We describe the successful laparoscopic formation of a peritoneal window for post-transplantation lymphocele drainage as an effective a...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.20.904
更新日期:2006-11-01 00:00:00
abstract:PURPOSE:To assess application of cystatin C and neutrophil gelatinase-associated lipocalin (NGAL) as biomarkers for renal ischemic injury. We also evaluated the use of allopurinol as a renoprotective agent. A second goal was to assess cystatin C as a biomarker in patients undergoing partial nephrectomy. METHODS:Using ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2013.0198
更新日期:2013-12-01 00:00:00