Duck Hyun Han

INTRODUCTION: Changes in the surgical treatment of nephrolithiasis, owing to recent technical advances and innovations, have made treatments more effective and less invasive. In this retrospective, observational cohort study, we identified the changing trends in the treatment of nephrolithiasis. MATERIALS AND METHODS: We included patients with newly diagnosed nephrolithiasis who received any treatment in the United States, including extracorporeal shockwave lithotripsy (SWL), retrograde intraren

INTRODUCTION: In humans, the role of testosterone in sexual functions, including sexual desire, nocturnal penile erections, and ejaculatory volume, has been relatively well established. However, the effects of testosterone on intrapenile structure in humans remains controversial. AIM: We assessed the direct effects of testosterone on potassium channels in human corporal smooth muscle cells, in an effort to understand the mechanisms inherent to the testosterone-induced relaxation of corporal smoo

BACKGROUND AND PURPOSE: Malignant ureteral obstruction (MUO) is a common condition and an intractable situation for patients with advanced cancer. There is currently no ideal ureteral stent to release the obstruction. Our purpose was to evaluate the clinical efficacy and safety of a novel, double-layered, coated, self-expandable metallic mesh stent (Uventa(™)) in MUO. PATIENTS AND METHODS: In a retrospective design, a total of 71 ureter units (54 patients) were included from December 2009 to Mar

UNLABELLED: What's known on the subject? And what does the study add? Schisandra chinensis extract (SCE) has been known to have relaxative effects on penile smooth muscle. A recent study showed that SCE could enhance slidenafil citrate-induced relaxation of penile corpus cavernosum. The current study investigated the mechanism of action of SCE and its constituents on corporal smooth muscle cells. And this study shows that SCE induced relaxation of CSM primarily through an endothelium independent

Objective: Recently, retrograde intrarenal surgery (RIRS) using laser lithotripsy has become popular. However, the optimal laser energy setting for pop-dusting has not been established. In this study, we report our experiences of RIRS using the high-power (up to 100 W) pop-dusting (HPPD) technique. Methods: This study retrospectively assessed 82 cases with RIRS using HPPD. Patients who underwent abdominal CT or mercaptoacetyltriglycine (MAG3) diuretic renal scan at 3 months postoperatively were

BACKGROUND: We aimed to compare the results of long-term use of two types of metal stent for chronic benign ureteral strictures. METHODS: Our study included 46 ureter units (UUs) that underwent metal stent placement from 2010 to 2017. We included benign ureteral strictures causes by variety reasons that could not be solved by other treatment and malignant obstructions were excluded. Covered mesh stent (Uventa™) and a thermo-expandable stent (Memokath 051™) were used. Primary success was defined

Ultrasound estimated bladder weight/corrected ultrasound estimated bladder weight is a statistically significant parameter correlating with bladder outlet obstruction. However, bladder weight/corrected bladder weight alone was insufficient to predict bladder outlet obstruction due to its weak correlation with and low accuracy for diagnosing obstruction.

During the last 2 decades, the role of retrograde intrarenal surgery (RIRS) has markedly expanded as an advanced treatment modality for urinary calculi. RIRS is now considered as a first-line treatment of renal stones sized less than 20 mm regardless of stone location, stone composition, or renal anatomy because of high success rates and low morbidities [1,2]. The stone-breaking and retrieval method is one of the most interesting aspects of RIRS. Traditionally, stone retrieval with a basket a

Encrustation and/or biofilm formation in ureteral stents are major causes of obstruction and reduce the lifetime of a ureteral stent. In this study, the inner surfaces of polyurethane (PU) tubes (inner and outer diameters of 1.2 and 2.0 mm, respectively) were reformed with Ar, O₂, and C₂H₂ gases using specialized plasma-enhanced chemical vapor deposition techniques for the first time. Then, the modified PU tubes were immersed in urine for 15 days, and the charact

Abstract Cystinuria is a genetic disorder caused by defects in the b 0,+ transporter system, which is composed of rBAT and b 0,+ AT coded by SLC3A1 and SLC7A9 , respectively. Variants in SLC3A1 and SLC7A9 follow autosomal recessive inheritance and autosomal dominant inheritance with reduced penetrance, respectively, which complicates the interpretation of cystinuria-related variants. Here, we report seven different SLC3A1 variants and six different SLC7A9 variants. Among these variants were two

BACKGROUND: This study aimed to investigate initial experiences and outcomes of a retrograde inserted new silicone-covered metallic ureteric stent (Urexel™) for malignant ureteric obstruction. METHODS: We retrospectively reviewed the medical records for 12 consecutive patients who underwent Urexel™ stent placement for malignant ureteric obstruction from March 2020 to March 2021. The Urexel™ stent is a segmental metallic ureteric stent composed of a nitinol mesh covered with a silicone membrane.