Abstract:
PURPOSE:To evaluate the physical properties of urethral catheters that are predictive of ease of placement and risk of urethral trauma: Stiffness, buckling, and friction forces. MATERIALS AND METHODS:Eleven Bard Lubri-Sil and 10 Kendall Dover 16F Foley catheters were tested using a linear motion stage driven by a stepper motor with a resolution of 5 microns/step or by hand. Force was measured at a sampling rate of 5 Hz with a Wagner FDIX digital force gauge. Friction force was measured by pulling each Foley catheter at a rate of 2.5 mm/s through a 15.6F hole drilled in 36-mm thick biologic material (Oscar Meyer Beef Light bologna 12 oz package). Ease of advancement was measured by the force necessary to maneuver a catheter around a 90-degree turn in a bulbar urethra modeled by 5/16 inch inner diameter silicone tubing and lubricant. Buckling forces were measured at the tip (8 mm), from the distal end of the balloon to the tip (30 mm), and along a 20 cm section of the shaft using the appropriate size force gauge. RESULTS:No significant difference was noted for friction force. The Kendall catheters (0.0686 +/- 0.102 lb(f)) took more force to advance around a 90-degree turn, compared with the Bard (0.602 +/- 0.110 lb(f), P = 0.003). Buckling force along the shaft and from the balloon to the tip was significantly greater for the Bard (0.051 +/- 0.02 lb(f), P < 0.001 and 0.892 +/- 0.166 lb(f), P < 0.001) compared with the Kendall (0.027 +/- 0.007 lb(f) and 0.803 +/- 0.129 lb(f)) catheters. Stiffness of the tip was significantly greater for the Kendall (2.644 +/- 0.552 lb(f), P < 0.001) compared with the Bard (2.101 +/- 0.437 lb(f)) Foley catheters. CONCLUSIONS:Traumatic catheterization is a major cause of urethral stricture. Catheter stiffness may increase the risk of urethral injury and subsequent stricture formation. Ease of advancement and tip stiffness may be important at predicting clinical performance of urethral catheters.
journal_name
J Endouroljournal_title
Journal of endourologyauthors
Hendlin K,Meyers J,Monga Mdoi
10.1089/end.2008.0503subject
Has Abstractpub_date
2009-01-01 00:00:00pages
169-71issue
1eissn
0892-7790issn
1557-900Xjournal_volume
23pub_type
杂志文章abstract:BACKGROUND AND OBJECTIVE:Repair of ureteral injuries and strictures often necessitates a major reconstructive procedure such as a psoas hitch, Boari flap, renal mobilization, ileal interposition, or autotransplantation. Tissue expanders have been used to elongate nerves and arteries. We examined the effects of acute ur...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1999.13.245
更新日期:1999-05-01 00:00:00
abstract:PURPOSE:To evaluate the feasibility, safety, and efficacy of retroperitoneoscopic microwave ablation (MWA) for clinical stage T(1a) (cT(1a)) renal tumors. PATIENTS AND METHODS:Consecutive renal cell carcinomas (RCCs) managed since April 2006 with a minimal follow-up of 12 months were included. A total of 23 tumors in ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2010.0204
更新日期:2010-12-01 00:00:00
abstract:BACKGROUND AND PURPOSE:The treatment of bilateral urinary calculus disease is often staged, irrespective of the modality of the treatment. Bilateral simultaneous percutaneous nephrolithotomy (PCNL) is still considered by many to be adventurous and risky. We carried out this prospective study of bilateral PCNL under a s...
journal_title:Journal of endourology
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1089/end.2000.14.285
更新日期:2000-04-01 00:00:00
abstract::We evaluated the safety and efficacy of high-intensity focused ultrasound (HIFU) using a modified Sonablate 200 and compared the clinical response with that of the prototype Sonablate at 6 months after treatment. Since 1995, 35 patients ages 66 +/- 7 years underwent HIFU with the Sonablate 200 for symptomatic benign p...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1997.11.197
更新日期:1997-06-01 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::Inability to remove a urethral catheter after radical retropubic prostatectomy is an uncommon complication. We describe removal of a urethral catheter entrapped in vesicourethral anastomotic sutures, which was safely performed endoscopically using a holmium laser. ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2005.19.83
更新日期:2005-01-01 00:00:00
abstract::We describe our experience using an iodinated contrast solution to hydrodissect adjacent structures before percutaneous renal cryoablation. Hydrodissection was performed before cryoablation with placement of a 20-gauge, 15-cm introducer needle into the retroperitoneum under CT or ultrasonographic guidance followed by ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2011.0516
更新日期:2012-05-01 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:INTRODUCTION:The Endockscope combines a smartphone, a battery powered flashlight and a fiberoptic cystoscope allowing for mobile videocystoscopy. We compared conventional videocystoscopy with the Endockscope paired with next generation smartphones in an ex-vivo porcine bladder to evaluate its image quality. MATERIALS ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2018.0275
更新日期:2018-08-01 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:Extracorporeal shockwave therapy (ESWT) has been reported to improve the symptoms of Peyronie's disease. However, the response rates to this treatment appear to be variable. This study aimed to determine whether any patient or plaque characteristics are associated with a better outcome. PATIENTS...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2006.20.135
更新日期:2006-02-01 00:00:00
abstract:BACKGROUND AND PURPOSE:The use of bipolar electrocautery has proven advantages over monopolar energy during transurethral surgery by limiting hyponatremia and its clinical sequelae. Percutaneous ablation of caliceal diverticula and parapelvic renal cysts has been shown to be an effective surgical approach for the manag...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2010.0525
更新日期:2011-05-01 00:00:00
abstract:PURPOSE:To determine the temperature-time threshold of local cell death in vivo for thermal therapy in a prostate cancer animal model and to use this value as a benchmark to quantify global tissue injury. MATERIALS AND METHODS:Two studies were designed in the Dunning AT-1 rat prostate tumor hind limb model. For both s...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/089277901750426436
更新日期:2001-08-01 00:00:00
abstract::Partial nephrectomy (PN) is a technically challenging procedure, making selection of appropriate patients paramount to a successful operation. To identify patients at increased risk of an adverse outcome after PN, there are a number of scoring systems available. The nephrometry score was initially described in a serie...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2013.0202
更新日期:2013-12-01 00:00:00
abstract:: Introduction: How to quantify the impact of metabolic syndrome (MetS) on percutaneous nephrolithotomy (PCNL) is unclear. We aimed to evaluate the quantified effect of the number of MetS components on the outcome of PCNL. Materials and Methods: ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2019.0404
更新日期:2019-11-01 00:00:00
abstract:PURPOSE:To compare the incidence of urethral strictures after monopolar transurethral resection of the prostate (TURP) and bipolar transurethral resection in saline (TURIS) for symptomatic benign prostatic hyperplasia. PATIENTS AND METHODS:Between January 2005 and January 2009, 518 patients with symptomatic benign pro...
journal_title:Journal of endourology
pub_type: 杂志文章,随机对照试验
doi:10.1089/end.2009.0575
更新日期:2010-08-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Renal Fine Needle Aspiration Cytology (FNAC) has gained popularity due to increasing options in management of renal lesions such as energy ablation and active surveillance. The diagnostic yield of renal FNAC varies between 40-90%. We hypothesized that adequate and diagnostic FNA samples would be ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2008.9724
更新日期:2008-10-01 00:00:00
abstract:BACKGROUND AND PURPOSE:There have been several reports of rhabdomyolysis occurring after prolonged laparoscopic procedures in the flank position. Accordingly, we evaluated interface pressures between the skin and three commonly used operating room table surfaces. The aim of our study was to determine if pressure change...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2008.0047
更新日期:2008-06-01 00:00:00
abstract:OBJECTIVE:The aim of our study was to evaluate if there is any advantage of three-dimensional helical computed tomography (3D-HCT) over intravenous urogram (IVU) in the morphometric and morphological analysis of lower pole spatial anatomy of the kidney. PATIENTS AND METHODS:We analyzed 52 renal collecting systems in 3...
journal_title:Journal of endourology
pub_type: 临床试验,杂志文章
doi:10.1089/end.2009.0262
更新日期:2009-12-01 00:00:00
abstract::Ureteral stents and nephrostomy tubes have been used extensively in urology. Attendant to their use are their associated morbidities, such as pain, infection, and encrustation. We review the literature on the subject of the encrusted stents and drainage catheters, discuss the risk factors for encrustation, and describ...
journal_title:Journal of endourology
pub_type: 杂志文章,评审
doi:10.1089/end.2006.0382
更新日期:2008-05-01 00:00:00
abstract:BACKGROUND AND PURPOSE:The use of flexible ureteroscopy for diagnosis and management of upper urinary tract diseases is limited both by loss of maximum active deflection through the inserted working probes and a high frequency of damage with consequent costs. A newly developed ureteroscope (Flex-X, Karl Storz) with a m...
journal_title:Journal of endourology
pub_type: 杂志文章,随机对照试验
doi:10.1089/end.2006.0291
更新日期:2007-12-01 00:00:00
abstract::The appropriate position of the hand-access device and trocars for hand-assisted laparoscopic surgery depends on several factors, including the surgeon's preference, physical stature, and handedness; the patient's anatomy; and the type of procedure being performed. This article reviews the options, including measures ...
journal_title:Journal of endourology
pub_type: 杂志文章,评审
doi:10.1089/089277904323056843
更新日期:2004-05-01 00:00:00
abstract:PURPOSE:Standard laparoscopy has undergone many recent advances with the advent of three-dimensional visual systems and robotic surgical systems. In evaluating the usefulness of these new systems, it is difficult to objectively measure their advantages in the operating room. Therefore, we designed a trial using three d...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2007.0241
更新日期:2008-03-01 00:00:00
abstract:: Objectives: To investigate the feasibility and efficacy of live renal ultrasonography to guide Double-J ureteral stent placement at the bedside. Patients and Methods: Between April 12 and June 5, 2020, patients presenting with ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2020.0954
更新日期:2020-12-17 00:00:00
abstract:AIM AND BACKGROUND:Posttransplant vesicoureteral reflux (VUR) is a common urologic complication after renal transplantation, although its management is controversial. The treatment of choice is open surgical revision ureteral reimplantation with significant morbidity. Recently, endoscopic correction by using nonanimal ...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2010.0219
更新日期:2010-10-01 00:00:00
abstract::Seventy-four consecutive cases of ureteral stones listed for ureteroscopic lithotripsy were studied prospectively. In all cases, the Wolf 7.5F or 9F ureteroscope was used in conjunction with the Swiss Lithoclast system. Dormia baskets were employed on four occasions to prevent forward propulsion of fragments. Ureteros...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.1998.12.341
更新日期:1998-08-01 00:00:00
abstract:BACKGROUND AND PURPOSE:New-generation flexible ureteroscopes allow the management of proximal ureteral and intrarenal pathology with high success rates, including complete removal of ureteral and renal calculi. One problem is that the irrigation pressures generated within the collecting system can be significantly elev...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/089277904322836631
更新日期:2004-02-01 00:00:00
abstract:BACKGROUND AND PURPOSE:The introduction of radiofrequency ablation (RFA) into other fields of surgery has fueled the interest to study its application in small renal masses (SRM). Some controversies remain, however, regarding its oncologic efficacy. We review technical factors and tissue characteristics that influence ...
journal_title:Journal of endourology
pub_type: 杂志文章,评审
doi:10.1089/end.2009.0677
更新日期:2010-05-01 00:00:00
abstract::This study aimed to measure acoustic access to the prostate for extracorporeal ultrasound ablation. Both transabdominal and transperineal approaches were considered. The objective was to measure the size and shape of the aperture available for unobstructed targeting of the prostate. CT images of 17 randomly selected m...
journal_title:Journal of endourology
pub_type: 杂志文章
doi:10.1089/end.2009.0567
更新日期:2010-11-01 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