Bob Djavan¹, Elisabeth Eckersberger¹, Markus Johannes Handl², Roland Brandner¹, Helen Sadri¹, Herbert Lepor¹

Canadian Journal of Urology, Vol.17, No.4, pp. 5249-5254, 2010

Abstract Background: Transurethral resection of the prostate (TURP) has been the gold standard of the treatment of benign prostatic hyperplasia (BPH). In recent years there has been a significant shift in the treatment of BPH and guidelines emphasize minimally invasive surgery as a new treatment option. Minimal invasive technologies (MITs), such as transurethral microwave thermotherapy (TUMT), laser ablations, transurethral needle ablation (TUNA) have emerged as an alternative to the TURP.
Objectives: To assess the retreatment rates of the most commonly used minimal invasive techniques.
Search strategy: Durability articles were selected by using defined search terms using PubMed as search engine.
… More >

Idir Ouzaid¹, Jean-François Hermieu¹, Sébastien Dominique¹, Pedro Fernandez², Laurence Choudat³, Vincent Ravery¹

Canadian Journal of Urology, Vol.17, No.5, pp. 5405-5407, 2010

Abstract Introduction: We present a case of a differentiated adenocarcinoma of the female urethra, which caused dysuria and voiding dysfunction.
Materials and methods: A 54-year-old female presented with dysuria and the sensation of incomplete voiding.
Results: An ultrasound-guided biopsy showed a urethral carcinoma. A magnetic resonance imaging (MRI) scan showed a high-stage tumor. The patient had a pelvic exenteration. The patient was free of disease after 2 years of follow up.
Conclusion: Urethral carcinoma is a rare malignancy. A biopsy is necessary to make a diagnosis. MRI is the best imaging for tumor staging. Small tumors are treated with a More >

Adam Stewart, David Hill

Canadian Journal of Urology, Vol.17, No.5, pp. 5403-5404, 2010

Abstract We present the case of a 6-month-old boy with an intra-abdominal testicle that spontaneously descended into the scrotum after the first stage of a planned 2 stage laparoscopic Fowler-Stephens orchidopexy. To our knowledge this has not been reported. More >

Alexander Tsivian, Matvey Tsivian, A. Ami Sidi

Canadian Journal of Urology, Vol.17, No.5, pp. 5394-5396, 2010

Abstract Introduction: Injuries of the upper (lumbar) portion of the ureter are rare; however, their reconstruction may pose considerable challenges. We describe a novel technique of surgical reconstruction in case of a long upper ureteral obliteration that may be a viable treatment option in select patients.
Materials and methods: Reconstruction of a iatrogenic 5 cm injury to the upper ureter, consisting of 2 cm obliteration and 1.5 cm stenotic segments on its sides, unsuitable for an end-to-end reanastomosis, was performed using a novel technique of augmented pelvic flap anastomotic ureteroplasty. The injured ureteral segment was excised, the ureteral… More >

Jeffrey J. Tomaszewski, Marc C. Smaldone, Sami Makaroun, Ryan P. Smith, Sushil Beriwal, Ronald M. Benoit

Canadian Journal of Urology, Vol.17, No.5, pp. 5360-5364, 2010

Abstract Introduction: Given the shorter half-life of cesium-131 (Cs-131) compared to iodine-125 (I-125), we hypothesized that initial PSA outcomes may differ. We compare initial PSA outcomes in men undergoing Cs-131 prostate brachytherapy to men treated with I-125.
Patients and methods: The first post-treatment PSA (obtained 3-6 months after the procedure) was compared in patients undergoing I-125 prostate brachytherapy to that of patients undergoing Cs-131 prostate brachytherapy at the same institution. Comparisons included the total cohort as well as low and intermediate risk patients.
Results: Mean pre-treatment PSA was 6.9 ng/mL in the I-125 cohort, and 6.9 ng/mL in the… More >

Thomas J. Guzzo¹, Matthew J. Resnick¹, Daniel J. Canter¹, Arturo Balandra¹, Meredith R. Bergey¹, Laurie Magerfl eisch¹, John E. Tomaszewski², David J. Vaughn³, S. Bruce Malkowicz¹

Canadian Journal of Urology, Vol.17, No.6, pp. 5465-5471, 2010

Abstract Introduction: Radical cystectomy (RC) remains the gold standard treatment for patients with muscle-invasive bladder cancer. Unfortunately, a significant proportion of patients will have lymph node involvement at the time of RC. We set out to determine the impact of adjuvant cisplatin-based chemotherapy (AC) in a cohort of lymph node positive patients following RC.
Patients and methods: We reviewed our RC database and isolated patients with lymph node positive disease at the time of RC. Univariate and multivariable analysis was performed to identify predictors of poor outcome in patients receiving AC. Overall survival (OS), disease specific survival (DSS)… More >

Christopher K. Hwang, Kenneth Ogan, John Pattaras, Viraj A. Master

Canadian Journal of Urology, Vol.17, No.6, pp. 5459-5464, 2010

Abstract Introduction: The detection rate of incidental renal masses is increasing. Historically these masses have been treated with extirpative surgery. Hence, there is little information on the growth rate, metastatic potential, and natural history of renal tumors. Through active surveillance, we study the natural history of renal masses and determine their growth rate and risk for metastasis.
Materials and methods: From 1997 to 2007, active surveillance was offered to select patients with renal masses with no evidence of metastasis. Based on imaging studies from the initial diagnosis to the last follow up, tumor growth rates were determined.
Results: Forty-six… More >

Calvin Hong Li^a, G. P. Peterson^b,*

Frontiers in Heat and Mass Transfer, Vol.1, No.2, pp. 1-10, 2010, DOI:10.5098/hmt.v1.2.3007

Abstract An experimental investigation of the Critical Heat Flux (CHF) and heat transfer coefficient (HTC) of two-phase heat transfer of de-Ionized (DI) water, pool boiling was conducted using several kinds of sintered copper microparticle porous uniform and modulated structures. The modulated porous structure reached a heat flux of 450 W/cm² and a heat transfer coefficient of 230,000 W/m2K. The thick and thin uniform porous structures achieved CHFs of 290 W/cm² and 227 W/cm² , respectively, and heat transfer coefficients of 118,000 W/m²K and 104,000 W/m²K. The mechanisms for the dramatically improved CHFs and HTCs were identified with assistance of More >

Peter Kasten^a, Severin Zimmermann^a, Manish K. Tiwari^a, Bruno Michel^b, Dimos Poulikakos^a,*

Frontiers in Heat and Mass Transfer, Vol.1, No.2, pp. 1-10, 2010, DOI:10.5098/hmt.v1.2.3006

Abstract Electronic data center cooling using hot water is proposed for high system exergetic utility. The proof-of-principle is provided by numerically modeling a manifold micro-channel heat sink for cooling microprocessors of a data center. An easily achievable 0.5l/min per chip water flow, with 60°C inlet water temperature, is found sufficient to address the typical data center thermal loads. A maximum temperature difference of ~8°C was found between the solid and liquid, confirming small exergetic destruction due to heat transport across a temperature differential. The high water outlet temperature from the heat sink opens the possibility of More >

Li Chen, Hui-Bao Luan, Wen-Quan Tao^*

Frontiers in Heat and Mass Transfer, Vol.1, No.2, pp. 1-11, 2010, DOI:10.5098/hmt.v1.2.3002

Abstract Multi-phase lattice Boltzmann method is applied to investigate liquid water transport in th GDL and GC. The liquid water transport processes in the GDL, near the GDL-GC interfaces and in the GC are discussed. The effects of channel land on liquid water dynamic behaviors and distribution in the GDL and GC are investigated. It is found that channel land covers the GDL-GC interface where liquid water reaches changes the water distribution near the GDL-GC interface and in the GC. While channel land is apart from the GDL-GC interface where liquid water reaches changes the effects More >