Publications by authors named "Mahmoud R el-Kenawy"
To assess the ideal interval between repeated extracorporeal shockwave lithotripsy (SWL) for renal stones. Eligible patients with a single renal stone ≤20 mm who required SWL were randomly assigned to one of three groups based on intervals between first and second sessions. Patients underwent the second session after 3, 7, and 14 days in Groups 1, 2, and 3, respectively.
View Article and Find Full Text PDFPurpose: We investigated the efficacy and safety of fluoxetine, a selective serotonin reuptake inhibitor, for treating refractory primary monosymptomatic nocturnal enuresis in children.
Materials And Methods: Children 8-18 years old with severe primary monosymptomatic nocturnal enuresis unresponsive to alarm therapy, desmopressin, and anticholinergics were screened for eligibility. After excluding children with daytime urinary symptoms, constipation, underlying urological, neuropsychiatric, endocrinological, or cardiac conditions, patients were randomly and equally assigned to 10 mg fluoxetine once daily or placebo for 12 weeks.
Introduction: We compare percutaneous nephrolithotomy (PCNL) and open surgery in the treatment of staghorn stones in children.
Methods: We retrospectively reviewed the electronic records of children who underwent treatment for staghorn stones between September 2000 and August 2013. They were divided between Group 1 (patients who underwent PCNL) and Group 2 (patients who underwent open surgery).
Objective: To evaluate the long-term functional outcome of percutaneous nephrolithotomy (PNL) for calculi in solitary kidneys and to determine factors leading to renal function deterioration.
Materials And Methods: The computerized files of patients with solitary kidneys who underwent PNL between January 2002 and December 2009 were retrospectively reviewed. Patients with follow-up <2 years were excluded.
Objective: To present the results of percutaneous nephrolithotomy (PCNL) for treating staghorn stones.
Patients And Methods: A database was compiled from the computerised files of patients who underwent PCNL for staghorn stones between 1999 and 2009. The study included 238 patients (128 males and 110 females) with a mean (SD) age of 48.
Unlabelled: WHAT'S KNOWN ON THE SUBJECT? AND WHAT DOES THE STUDY ADD?: Extracorporeal shockwave lithotripsy is effective for the treatment of paediatric renal stones with favourable short-term safety. Extracorporeal shockwave lithotripsy for treatment of paediatric renal stones is also safe for the kidney and the child on long-term follow-up.
Objective: To evaluate the long-term effects of extracoporeal shockwave lithotripsy (SWL) for treatment of renal stones in paediatric patients.
Objective: To determine factors affecting the stone-free rate and complications of percutaneous nephrolithotomy (PNL) for treatment of staghorn stones.
Methods: The computerized database of patients who underwent PNL for treatment of staghorn stones between January 2003 and January 2011 was reviewed. All perioperative complications were recorded and classified according to modified Clavien classification system.
Objective: • To study long-term results of percutaneous nephrolithotomy (PNL) for treatment of staghorn stones.
Patients And Methods: • The records of patients who underwent PNL for staghorn stones between January 1998 and January 2008 were retrospectively reviewed. • Patients who completed follow-up for one year or more were included.
Objective: To determine factors affecting the success of bilateral same-session ureteroscopy (BSU) in the treatment of ureteral calculi.
Material And Methods: From January 2003 to December 2008, BSU was carried out in 89 patients (178 renal units). A successful outcome was considered when both ureters were free of stones without intraoperative complications.
Objectives: To evaluate the role of percutaneous nephrolithotomy in management of the patients with autosomal dominant polycystic kidney disease and associated nephrolithiasis.
Methods: A total of 19 patients with autosomal dominant polycystic kidney disease and upper urinary tract stones were included in the study. One patient had bilateral renal stones.
Objectives: To use a matched-pair analysis design to compare the safety and efficacy of shock wave lithotripsy (SWL) and ureteroscopy (URS). Controversy still exists regarding whether SWL or URS is the best management of upper ureteral calculi.
Methods: We reviewed the records of patients with a single radiopaque upper ureteral stone treated by URS or SWL from January 2003 to December 2005.
Purpose: We determined the factors predicting unfavorable results of semirigid ureteroscopy for ureteral calculi.
Materials And Methods: We reviewed the computerized files of 841 patients who underwent a total of 908 ureteroscopic procedures for ureteral stones from January 2003 through December 2006. A semirigid 6/7.
Purpose: This study was conducted to evaluate the safety and efficacy of the supracostal approach for percutaneous nephrolithotomy in pediatric patients.
Materials And Methods: We retrospectively reviewed 60 percutaneous nephrolithotomy procedures done in 50 children (32 boys and 18 girls) between 2000 and 2007. Mean patient age was 7 +/- 4 years (range 9 months to 14 years).
Purpose: We clarified the long-term effects of extracorporeal shock wave lithotripsy on renal function and blood pressure, and its relation to body mass index and type of lithotriptor.
Materials And Methods: A total of 100 patients with a single radiopaque renal stone 2 cm or less in length were followed for 18 to 57 months (mean 43.6 +/- 13.
Evaluation of a synchronous twin-pulse technique for shock wave lithotripsy: a prospective randomized study of effectiveness and safety in comparison to standard single-pulse technique.
BJU Int
June 2008
Objective: To asses the efficacy and safety of bidirectional synchronous twin-pulse extracorporeal shock wave lithotripsy (ESWL) compared with standard ESWL.
Patients And Methods: Between March 2003 and December 2006, 240 patients with a radio-opaque single renal stone of
Purpose: To present the combination of laparoscopy and nephroscopy for the treatment of stones in pelvic ectopic kidneys.
Patients And Methods: The series included seven male and four female patients (mean age 43 +/- 9 years). Laparoscopy-assisted percutaneous nephrolithotomy (PCNL) was performed for caliceal stones in five patients after failure of shockwave lithotripsy, while laparoscopic pyelolithotomy was performed for large or branched renal pelvic stones in six patients.
Purpose: Despite evidence that urologists can safely acquire percutaneous renal access for percutaneous nephrolithotomy, many centers still rely on interventional radiologists to obtain renal access. In this study we evaluated percutaneous access for percutaneous nephrolithotomy obtained by interventional radiologists or urologists, and compared access outcomes and complications.
Materials And Methods: The surgical records of 1,121 patients with 1,155 stone bearing kidneys treated with percutaneous nephrolithotomy between 1999 and 2003 were reviewed.
The first-line management of renal stones between 20-30 mm remains controversial. The Extracorporeal Shock Wave Lithotripsy (ESWL) stone-free rates for such patient groups vary widely. The purpose of this study was to define factors that have a significant impact on the stone-free rate after ESWL in such controversial groups.
View Article and Find Full Text PDFPurpose: We identified risk factors predicting severe bleeding due to percutaneous nephrolithotomy.
Materials And Methods: Computerized data on 2,909 patients who underwent a total of 3,878 percutaneous nephrolithotomy procedures between January 1995 and December 2005 were retrospectively reviewed. Data on patients who experienced severe bleeding requiring angiographic renal embolization were compared with those on other patients using univariate and multivariate analyses.
Objective: The surgical management of renal and upper ureteral calculi presents unique challenges in obese patients. We reviewed our recent experience with percutaneous nephrolithotomy (PNL) in obese patients to determine the safety and outcome of this procedure in such group of patients.
Patients And Methods: The surgical records of 1121 patients treated with PNL between 2000 and 2004 were reviewed.
Objective: To determine prognostic variables which influence late recurrence after initially successful percutaneous endopyelotomy for secondary ureteropelvic junction obstruction (UPJO).
Material And Methods: Between July 1987 and March 2002, 67 patients with secondary UPJO were treated with percutaneous endopyelotomy at our center. Long-term follow-up data were available for 50 patients with initially successful results (42 after a single treatment and eight after repeated endopyelotomy).
Objectives: To present our experience in percutaneous management of large upper tract stones after urinary diversion.
Methods: From October 1984 to March 2005, 20 percutaneous nephrolithotomy and 4 antegrade ureteroscopy procedures were performed in 17 men and 7 women, with a mean age of 53.5 years.
Objectives: To identify the risk factors implicated in colonic perforation during percutaneous nephrolithotomy.
Methods: From 1985 to 2004, 5039 percutaneous nephrolithotomy procedures were performed in our center. Colonic perforation complicated 15 procedures (0.