An Enhanced Indoor Positioning Technique Based on a Novel Received Signal Strength Indicator Distance Prediction and Correction Model.

Indoor positioning has become a very promising research topic due to the growing demand for accurate node location information for indoor environments. Nonetheless, current positioning algorithms typically present the issue of inaccurate positioning due to communication noise and interferences. In addition, most of the indoor positioning techniques require additional hardware equipment and complex algorithms to achieve high positioning accuracy.

Pediatric kidney transplantation in Egypt: Results of 10-year single-center experience.

Pediatric kidney transplantation is a multidisciplinary therapy that needs special consideration and experience. In this study, we aimed to present CUCH experience; over a 10-year period, as a specialized center of kidney transplantation in children. We studied 148 transplantations performed at a single center from 2009 to 2018.

Visual internal urethrotomy for management of urethral strictures in boys: a comparison of short-term outcome of holmium laser versus cold knife.

Purpose: To compare efficacy and safety of visual internal urethrotomy (VIU) using holmium laser (Ho:YAG) (group A) versus cold knife (group B) in children with urethral strictures. It may be the first comparative study on this issue in children.

Methods: This study compared Ho:YAG group, which was evaluated prospectively from January 2014 till January 2016, versus cold knife group, which was a historical control performed from March 2008 till February 2010.

Risk factors for urological complications following living donor renal transplantation in children.

The aim of this study was to detect possible risk factors for UC and UTI following pediatric renal Tx and effect of these complications on outcome. One hundred and eight children who underwent living donor Tx between 2009 and 2015 were retrospectively included. Extraperitoneal approach was used with stented tunneled extravesical procedure.

The role of voiding cystourethrography in asymptomatic unilateral isolated ureteropelvic junction obstruction: A retrospective study.

Introduction: The presence of concomitant vesicoureteric reflux (VUR) and ureteropelvic junction obstruction (UPJO) is uncommon. Nevertheless, the reported VUR coexisting with asymptomatic unilateral isolated hydronephrosis (AUIH) requiring pyeloplasty for correction of UPJO was of low grade and mostly resolved during conservative follow-up. Therefore, VCUG may be not indicated in these children except if voiding symptoms, urinary tract infection (UTI), dilated ureters, or bladder and ureteric abnormalities are suspected.

Dismembered Pyeloplasty in Infants 6 Months Old or Younger With and Without External Trans-anastomotic Nephrostent: A Prospective Randomized Study.

Objective: To compare the outcome of dismembered pyeloplasty in infants with and without external nephro-ureteric stent (ENUS) for treatment of congenital ureteropelvic junction obstruction.

Methods: This is a parallel, randomized comparative study between October 2013 and September 2014. Thirty infants ≤6 months old with ureteropelvic junction obstruction indicated for dismembered pyeloplasty were randomly assigned (block randomization, closed envelope method) into two groups: group A (stentless) and group B (ENUS).

A Prospective Evaluation of High-Resolution CT Parameters in Predicting Extracorporeal Shockwave Lithotripsy Success for Upper Urinary Tract Calculi.

Objective: To evaluate the ability of noncontrast CT parameters (stone size, stone attenuation, and skin-to-stone distance [SSD]) to predict the outcome of extracorporeal shockwave lithotripsy (SWL) in a prospective cohort of patients with renal and upper ureteric stones.

Patients And Methods: Patients with stones 5 to 20 mm were prospectively enrolled from 2011 to 2014. Patients had NCCT with recording of stone size, stone mean attenuation, and SSD, as well as various stone and patient parameters.

Lower calyceal and renal pelvic stones in preschool children: A comparative study of mini-percutaneous nephrolithotomy versus extracorporeal shockwave lithotripsy.

Objectives: To compare outcomes of the mini-percutaneous nephrolithotripsy technique and extracorporeal shockwave lithotripsy for lower calyceal and renal pelvic stones in preschool children.

Methods: From January 2010 to December 2014, single renal pelvic or lower calyceal calculi 10-25 mm in size in children (age ≤6 years) treated by either extracorporeal shockwave lithotripsy (64 patients) or the mini-percutaneous nephrolithotripsy technique (54 patients) were included. Extracorporeal shockwave lithotripsy was carried out by using a Dornier electromagnetic lithotripter.

Outcomes of living donor renal transplantation in children with lower urinary tract dysfunction: a comparative retrospective study.

Objectives: To compare outcomes of renal transplantation (RTx) in children with end-stage renal disease (ESRD) resulting from lower urinary tract dysfunction (LUTD) vs other causes.

Patients And Methods: A database of children (<18 years old) who underwent RTx between May 2008 and April 2012 was reviewed. Patients were divided into those with LUTD (group A, n = 29) and those with other causes of ESRD (group B, n = 74).

Outcome of Mini-percutaneous Nephrolithotomy for Renal Stones in Infants and Preschool Children: A Prospective Study.

Objective: To assess the safety and efficacy of Miniperc for renal stones in preschool-age patients. To the best of our knowledge, this may be the first prospective study on this subject. Reports on Miniperc are still few and mostly retrospective using a sheath size of ≥ 18Fr, which is still relatively large for young children.

Transurethral Holmium Laser Cystolithotripsy in Children: Single Center Experience.

Purpose: To evaluate prospectively safety and efficacy of transurethral cystolithotripsy (CL) in children using holmium:yttrium-aluminum-garnet (Ho:YAG) laser. This is important in developing countries, because the risk of bladder stones in children is high. Open cystolithotomy (OC) was the main line of treatment.

Ureteric stents vs percutaneous nephrostomy for initial urinary drainage in children with obstructive anuria and acute renal failure due to ureteric calculi: a prospective, randomised study.

Objectives: To compare percutaneous nephrostomy (PCN) tube vs JJ ureteric stenting as the initial urinary drainage method in children with obstructive calcular anuria (OCA) and post-renal acute renal failure (ARF) due to bilateral ureteric calculi, to identify the selection criteria for the initial urinary drainage method that will improve urinary drainage, decrease complications and facilitate the subsequent definitive clearance of stones, as this comparison is lacking in the literature.

Patients And Methods: A series of 90 children aged ≤12 years presenting with OCA and ARF due to bilateral ureteric calculi were included from March 2011 to September 2013 at Cairo University Pediatric Hospital in this randomised comparative study. Patients with grade 0-1 hydronephrosis, fever or pyonephrosis were excluded.

The effect of preoperative clinical variables on the 30- and 90-day morbidity and mortality after radical cystectomy: A single-centre study.

Objective: To analyse the effect of preoperative clinical variables and comorbidity on the early, late and cumulative 90-day morbidity and mortality rates, as well as hospital re-admissions, after radical cystectomy (RC), in one centre.

Patients And Methods: All patients undergoing RC over a period of 3 months were included. Preoperative investigations included measurements of serum albumin, a complete blood analysis, body mass index (BMI), Charlson comorbidity index (CCI) and the age-adjusted CCI (ACCI).

Holmium laser enucleation versus photoselective vaporization for prostatic adenoma greater than 60 ml: preliminary results of a prospective, randomized clinical trial.

Purpose: To our knowledge we report the first single center, prospective, randomized study comparing holmium laser enucleation and high performance GreenLight™ prostate photoselective vaporization as surgical treatment of prostatic adenomas greater than 60 ml.

Materials And Methods: A total of 80 patients with a large prostatic adenoma were randomly assigned to surgical treatment with holmium laser enucleation or photoselective vaporization. International Prostate Symptom Score, International Index of Erectile Function-15, maximum flow rate, post-void residual urine, serum prostate specific antigen and transrectal ultrasound volume were recorded.

Use of oxidized cellulose hemostats (Surgicel™) to support parenchymal closure and achieve hemostasis following partial nephrectomy.

Elective nephron-sparing surgery (NSS) for renal cell carcinoma (RCC) has gained general acceptance as an alternative to radical nephrectomy. To achieve hemostasis without risk of local ischemia and necrosis of kidney parenchyma after standard hemostatic suturing, we investigated oxidized cellulose hemostats' efficacy and safety as atraumatic hemostatic treatment and for the closure of a large parenchymal defect after kidney tumor resection. Our approach has been particularly helpful for repairing large and irregular renal parenchymal defects.

Low-grade endometrial stromal sarcoma with intravenous extension to the heart.

Endometrial stromal sarcoma (ESS) is a rare neoplasm of uterine origin. Intracardiac metastasis from this tumor is extremely infrequent. This report describes a 24-year-old woman from Yemen who had irregular vaginal bleeding shortly after spontaneous abortion.

Long-term followup of dermal grafts for repair of severe penile curvature.

Purpose: There is some reluctance to use dermal grafts for augmenting the tunica albuginea to correct severe forms of chordee. The main concern is that by violating the integrity of the tunica albuginea venous leakage could presumably ensue and result in erectile dysfunction. We present our long-term followup of dermal grafts used to correct severe penile curvature associated with hypospadias or as an isolated malformation.