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Dive into the research topics where Stella Ivaz is active.

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Featured researches published by Stella Ivaz.


Neurourology and Urodynamics | 2016

Intermittent self‐dilatation for urethral stricture disease in males: A systematic review and meta‐analysis

Stella Ivaz; Rajan Veeratterapillay; Matthew J. Jackson; Christopher Harding; Trevor J. Dorkin; Daniela E. Andrich; Anthony R. Mundy

Intermittent self‐dilatation (ISD) may be recommended to reduce the risk of recurrent urethral stricture. Level one evidence to support the use of this intervention is lacking.


Current Opinion in Urology | 2015

Quality and length of life, money and urethral stricture disease

Matthew J. Jackson; Stella Ivaz

Purpose of review This article walks through some of the ideas behind patient-reported outcome measurement and quality of life research against the backdrop of urethral stricture disease and conditions of the lower urinary tract more generally, why measurement matters at all, future areas for research and development and potential opportunities for misuse and manipulation. Recent findings It is the authors’ opinion that only one published study has substantially advanced our understanding of the way men with urethral stricture disease manage this condition in the real world, and, in turn, the outcomes those men seek when they consent to surgery and its associated risks. There is, however, almost certainly greater acceptance now by reconstructive urologists of the utility of patient-reported outcome measures in audit; surgical performance evaluation; clinical research; and fair, logical and transparent healthcare resource allocation at a population level. This is evidenced by the recent proliferation of studies incorporating patient-reported outcomes, which appear today to be on parity at least with those that surgeons historically gave priority to. Summary The next frontier in urethral stricture disease outcomes research is a better understanding of the impact of this condition on mens daily lives. That level of insight is likely to be gained through a mixture of qualitative and quantitative research methods applied to collaborative research ventures with men with the condition who, as those that have the most to gain and lose, must be majority stakeholders in this process.


Urologic Clinics of North America | 2017

The Nontransecting Approach to Bulbar Urethroplasty

Stella Ivaz; Simon Bugeja; Anastasia Frost; Daniela E. Andrich; Anthony R. Mundy

The standard treatment of bulbar urethral strictures of appropriate length is excision and primary anastomosis (EPA), irrespective of the cause of the stricture. This involves transection of the corpus spongiosum (CS) and disruption of the blood flow within the CS as a consequence. The success rate of EPA in curing these strictures is very high, but there is a considerable body of evidence and of opinion to suggest that there is a significant risk of sexual dysfunction and, potentially, of other adverse consequences that occur because of transection of the CS.


The Journal of Urology | 2017

V1-05 REDO BULBO-PROSTATIC ANASTOMOTIC (BPA) URETHROPLASTY FOR RECURRENT PELVIC FRACTURE-RELATED URETHRAL STRICTURES

Enrique Fes Ascanio; Simon Bugeja; Stella Ivaz; Felix Campos Juanatey; Anastasia Frost; Daniela E. Andrich; Anthony R. Mundy

located just at the site of the stenosis; any attempt for reconstruction may jeopardize continence. Anatomical studies have shown that the rhabdosphincter is separated from the membranous urethra by a sheath of connective tissue. We developed a novel technique performing a meticulous dissection of this sheath to separate the muscle from the urethral wall, thus performing an intra-sphincteric anastomosis without disturbing the sphincteric function METHODS: A 67 year old patient underwent a transvesical simple prostatectomy for BPH. He developed an early bulbo-membranous stenosis managed initially with repeated dilation until he went into complete retention needing a suprapubic tube. The bulbar urethra is exposed through a vertical perineal incision with splitting of the bulbo-spongiosum muscle and then separated from the corpus cavernosum. Opening of the perineal membrane and splitting of the intercrural space in the midline, provides access to the dorsal aspect of the bulbo-membranous junction. The bulb is then mobilized to the left side, without detachment from the perineal body and the bulbar vessels are retracted. The sheath of the membranous urethra is now opened circumferentially at the bulbo-membranous junction, carefully reflecting the circular muscle fibers of the external sphincter until exposure of the urethral wall is obtained and the connecting tissue plane is identified. Gentle blunt proximal dissection along this plane allows separating the muscle away from the urethra towards the prostatic apex until healthy urethra is found to perform the bulbo-prostatic anastomosis, which is completed with a standard parachute technique. Finally the sphincteric muscle ring is anchored to the anastomosis with interrupted absorbable stitches RESULTS: The patient was discharged on PO day 3 and the urethral catheter was removed at 3 weeks. He recovered normal continent micturition and is voiding symptoms free at 3 months of follow-up CONCLUSIONS: Excision and bulbo-prostatic anastomosis with sphincter sparing for bulbo-membranous stenosis after BPH surgery is feasible and safe. Our technique allows repairing the urethra preserving continence and to our knowledge it has not been described before. A larger series and reproduction in other centers are needed to validate this technique


The Journal of Urology | 2017

V1-08 SURGICAL CORRECTION OF URORECTAL FISTULA (URF) FOLLOWING RADICAL PROSTATECTOMY FOR THE TREATMENT OF PROSTATE CANCER.

Enrique Fes Ascanio; Simon Bugeja; Stella Ivaz; Felix Campos Juanatey; Anastasia Frost; Daniela E. Andrich; Anthony R. Mundy

hypospadias repair, urethral reconstruction, and correction of penile curvature. We set out to develop a retractor that would improve surgeon and assistant ergonomics and provide compression at the base of the penis to reduce blood loss. We describe this novel self-retaining penile retractor and our initial experience in its use. METHODS: This retractor is made of medical grade stainless steel. It has three components e a fixed hemostatic clamp attached to a scale, with also houses an artery forceps. This forceps moves along the scale to adjust the traction on the penis. The clamp is flat and compressive. The arms are non-traumatic and do not cause circumferential constriction. A stay suture taken through the glans is engaged by the artery forceps, and the height adjusted according to the penile length. The retractor has been used by reconstructive urologists in India, Turkey, Australia, Kuwait, Indonesia, and the United States of America. RESULTS: A total of 37 reconstructive cases were performed using this penile retractor (23 redo hypospadias repairs, 7 complex penile urethroplasties, 4 penile urethrocutaneous fistula repairs, and 3 surgeries for correction of Peyronie’s disease). For each case, surgeons were asked to score the retractor on a 4 point scale: 1. Extremely Non satisfactory, 2. Not Satisfactory, 3. Satisfactory, 4. Extremely Satisfactory. The average score was 3.65. Advantages noted were ease of application, reduction of assistant fatigue, stable operative exposure and non-traumatic tissue compression conferring a bloodless field. There were no complications attributable to the device. The main limitation is that it cannot be used for hypospadias proximal to the penoscrotal junction. This retractor is inexpensive, durable and easy to sterilize and can be used on adult and pediatric patients alike. CONCLUSIONS: In our experience this retractor has high utility in reconstruction of the penis and penile urethra. It affords improved ergonomics for the surgeon and assistant, which results in shorter operative times and reduced blood loss while avoiding tissue damage.


The Journal of Urology | 2017

PD64-10 LONG TERM OUTCOME FOLLOWING BLADDER NECK ARTIFICIAL URINARY SPHINCTER IMPLANTATION

Simon Bugeja; Stella Ivaz; Stacey Frost; Mariya Dragova; Daniela E. Andrich; Anthony R. Mundy

day voiding diary, and urinary flow rate and post-voiding residual urine volume before and after its administration. RESULTS: Motor symptoms significantly improved after 1 year evaluating movement disorder rating scale (p<0.01). Significant improvements were also observed in the answers provided on urinary questionnaires after 1 year treatment (IPSS: 14.4 7.6 vs. 8.5 6.8, OABSS: 6.9 2.8 vs. 5.5 3.7; p<0.05) [breakdown: Table]. Data from the KHQ revealed that the domain of impact on life had significantly improved after 1 year treatment [Table]. And in 3-day voiding diary, nighttime urinary frequency (3.0 1.6 vs. 2.4 0.7; p<0.05). However, no significant changes were observed in the urinary flow rate (Qmax) or post-voiding residual urine volume (RU) between before and after 1 year administration of istradefylline (Qmax (ml/s): 10.7 3.9 vs. 8.0 2.8, RU (ml): 51.0 60.0 vs. 40.5 30.8). No adverse urological effects were observed in any patient. CONCLUSIONS: Istradefylline effectively improved not only motor symptoms, but also LUTS in patients with PD in a long-term period. And the results of the present study confirmed that adenosine A2A receptor antagonists are useful as a new pharmacological treatment for OAB in patients with PD.


The Journal of Urology | 2017

PD29-07 OPEN REPAIR OF BLADDER NECK CONTRACTURES (BNC) WITH OR WITHOUT ADJUVANT RADIOTHERAPY – OUR EXPERIENCE IN 42 PATIENTS

Stella Ivaz; Simon Bugeja; Stacey Frost; Mariya Dragova; Daniela E. Andrich; Anthony R. Mundy

beam radiotherapy, 38.3% had brachytherapy and 5.8% had combined radiation modalities. The most common complications were urethral stricture/stenosis (88.3%), refractory storage LUTS (88.3%), incontinence (45.8%), erectile dysfunction (60.0%), radiation cystitis (50.8%), acute urinary retention (50.0%) and hematuria (42.5%). Other notable complications included prostate necrosis/abscess (14.2%), pubic osteomyelitis/prostatosymphyseal fistula (3.3%), de novo cancer (5.8%), and rectourethral fistula (0.8%). Patients required a mean of 7.4 4.4 (130) treatments for radiation related complications over the study period and 49.2% of patients required major urologic surgery. Required procedures included urethral dilation/urethrotomy (77.5%), urethral reconstruction (44.2%), incontinence surgery (6.7%), transurethral resection (prostate, bladder, contracture) (43.3%), cystolithopaxy (11.7%) and urinary diversion (6.7%). 13.3% of patients were treated with an indwelling suprapubic catheter. Patients with complications related to combined radiotherapy had more complications (7.0 vs. 5.0; p1⁄40.016) including incontinence (85.7% vs. 44.2%; p1⁄40.04), de novo malignancy (28.6% vs. 4.4%; p1⁄40.05), pubic osteomyelitis (28.6% vs. 1.8%; p1⁄40.02), and tended to require a higher number of procedures (10.1 vs. 7.2; p1⁄40.08). CONCLUSIONS: Lower urinary tract complications related to radiotherapy are very seldom an isolated problem and require a tremendous amount of resources and urologic intervention. Patients with combined radiotherapy complications have a higher number of complications and typically require more interventions.


The Journal of Urology | 2017

PD38-12 THE EFFECT OF RADIOTHERAPY ON THE OUTCOME OF THE REPAIR OF URORECTAL FISTULAE

Stella Ivaz; Simon Bugeja; Stacey Frost; Mariya Dragova; Daniela E. Andrich; Anthony R. Mundy

INTRODUCTION AND OBJECTIVES: The aim of this study was to assess the results of kidney transplant (KT) in patients with bladder augmentation (BA). METHODS: Between 1988 and 2015, 64 patients with BA (3 after KT) underwent kidney transplantation, due to significant lower urinary tract dysfunction. There were 40 males and 24 females. Ten second and 1 third KT were performed, comprising 75 KT in 64 patients. 44 were from living donor and 31 from deceased donor. Mean age at first KT was 22.54 15.09 (3-64) years and mean age at first bladder augmentation was 18.31 13.83 (2-64) years. The etiology of bladder dysfunction was neurogenic bladder due to spina bifida (23 patients), posterior urethral valve (12 patients), vesico-urethral reflux (6 patients), tuberculosis (8 patients) and other causes (14 patients). The bowel segments used in the augmentation included ileum in 45(70.3%) patients, ileocecal in 3(4.7%) patients and sigmoid in 4(6.3%) patients. The ureter was used in 12 (18.8%) patients. Redo BA was performed in 4 patients (1 ureterocistoplasty and 3 ileocistoplasty), all after ureterocistoplasty. In 2 patients, it was performed before the first kidney transplant. RESULTS: Mean follow-up after first BA was 172.47 112,07 (11-522) months. Overall patient survival was 77.6% and actuarial graft survival at 1,2,5,7,9 and 10 years was 92%, 87.6%, 81.2%, 67.8%, 65.7% and 53.9%, respectively. Surgical complications included 1 vesicocutaneous fistula and 1 stenosis of ureteral reimplant. 51(79.7%) patients were in clean intermittent catheterization. Symptomatic or febrile urinary tract infections (UTI) occurred at least 1 episode in 79.3% of patients. Ten (62.5%) patients died of unrelated cause and 6 (37.5%) patients died due to related causes. The main cause of graft loss was chronic allograft nephropaty in 21 (77.7%) patients. CONCLUSIONS: Augmentation cystoplasty is a safe and effective treatment for lower urinary dysfunction. Patients must be followed up closely with special attention to UTIs. Survival graft after 10 years seems to similar to regular KT recipients.


The Journal of Urology | 2017

PD34-02 HE LONG-TERM RESULTS OF NON-TRANSECTING BULBAR URETHROPLASTY

Stacey Frost; Stella Ivaz; Simon Bugeja; Mariya Dragova; Daniela E. Andrich; Anthony R. Mundy

INTRODUCTION AND OBJECTIVES: Anastomotic urethroplasty is an effective but occasionally controversial treatment for short bulbar urethral strictures. Non-transecting variations of anastomotic urethroplasty were created in part to address this controversy. The objective of this study is to assess current outcomes of anastomotic urethroplasty and compare outcomes of transecting and non-transecting techniques. METHODS: 171 patients with complete follow-up underwent anastomotic bulbar urethroplasty from September 2003 to May 2016. Patient age, stricture length, location, etiology, 90-day complications and semi-quantitative assessment of sexual dysfunction were recorded. The primary (objective) outcome was success defined as urethral patency >16Fr on routine follow-up cystoscopy. Secondary outcome measures included 90-day complications (Clavien 2) and de novo sexual dysfunction assessed at 6 months. Statistical comparison between transecting and non-transecting cohorts was made using Cox Regression Analysis and Chi-square when appropriate. RESULTS: One hundred and thirty patients underwent transecting anastomotic urethroplasty while 41 had a non-transecting anastomotic urethroplasty. Mean stricture length was 1.5 0.5cm (range 1-3) with a mean patient age of 43.0 18.0 years. 78.9% of patients failed prior endoscopic treatment (135/171) and 2.4% failed prior urethroplasty (4). Overall there was a 98.2% (168/171) success rate with a mean follow-up of 74.9( 46.7) months. 7.0% (12/171) of patients experienced a 90-day postoperative complication of Clavien 2 including 2.9% wound-related complications (5), 1.8% scrotal hematomas (3), 1.8% UTI (3), and 0.6% urethral bleeding (1). 9.9% reported an adverse change in sexual function including 6.4% erectile dysfunction (11), 1.8% ejaculatory dysfunction (3), 1.2% painful erection (2), and 0.6% chordee (1). When comparing transecting and non-transecting technique success using Cox Regression analysis there was no difference in urethroplasty success (97.7% vs. 100%; p1⁄40.63) and no difference in postoperative complications (7.7% vs. 4.9%; p1⁄40.73) but patients undergoing transecting anastomotic urethroplasty were more likely to report an adverse change in sexual function (13.1%; vs. 0%; p1⁄40.013). CONCLUSIONS: Anastomotic urethroplasty remains a highly effective treatment for short-segment bulbar urethral strictures with relatively minimal associated morbidity. Newer non-transecting anastomotic urethroplasty techniques appear to compare favorably in the short-term and may reduce the risk of associated sexual dysfunction.


Trends in Urology and Men's Health | 2015

Urethral stricture disease in men

Stella Ivaz; Simon Bugeja; Daniela E. Andrich

Most urethral strictures are either idiopathic or iatrogenic secondary to urethral instrumentation or failed surgery for hypospadias. In this article, the authors provide a concise general overview of urethral stricture and its management.

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Daniela E. Andrich

University College Hospital

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Anthony R. Mundy

University College Hospital

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Simon Bugeja

University College Hospital

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Anastasia Frost

University College London

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A.V. Frost

University College Hospital

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Anastasia Frost

University College London

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