Stephen Shei‐Dei Yang

ORCID: 0000-0003-3814-6980
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About
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Research Areas
  • Urinary Bladder and Prostate Research
  • Urological Disorders and Treatments
  • Pelvic floor disorders treatments
  • Pediatric Urology and Nephrology Studies
  • Urinary Tract Infections Management
  • Urologic and reproductive health conditions
  • Hernia repair and management
  • Prostate Cancer Diagnosis and Treatment
  • Kidney Stones and Urolithiasis Treatments
  • Genital Health and Disease
  • Sexual function and dysfunction studies
  • Gastrointestinal motility and disorders
  • Pelvic and Acetabular Injuries
  • Abdominal Trauma and Injuries
  • Bladder and Urothelial Cancer Treatments
  • Congenital Diaphragmatic Hernia Studies
  • Ureteral procedures and complications
  • Surgical Simulation and Training
  • Minimally Invasive Surgical Techniques
  • Treatment of Major Depression
  • Renal and Vascular Pathologies
  • Actinomycetales infections and treatment
  • Appendicitis Diagnosis and Management
  • Surgical site infection prevention
  • Lung Cancer Diagnosis and Treatment

Taipei Tzu Chi Hospital
2015-2025

Tzu Chi University
2013-2025

Buddhist Tzu Chi Medical Foundation
2018-2025

Johns Hopkins Medicine
2024

Johns Hopkins University
2024

University Medical Center
2024

University Hospital and Clinics
2024

Johns Hopkins Hospital
2021

National Taiwan University
2016

Buddhist Tzu Chi General Hospital
2008-2013

Abstract Purpose To establish the first age‐ and gender‐specific nomograms for single two consecutive tests post‐void residual urine (PVR). Material Methods Healthy children aged 4–12 years were enrolled sets of uroflowmetry PVR. The PVR lower value PVRs each child with a voided volume ≥50 ml included construction Single‐ Dual‐PVR nomograms. Children possible urinary tract infection or dysfunctions excluded. Results Limitations Totally, 1,128 (583 boys 545 girls) mean age 7.7 ± 2.2 eligible...

10.1002/nau.22342 article EN Neurourology and Urodynamics 2013-04-17

No AccessJournal of UrologyCLINICAL UROLOGY: Original Articles1 May 2002Is Ureteral Stenting Necessary After Uncomplicated Ureteroscopic Lithotripsy? A Prospective, Randomized Controlled Trial YUNG-TAI CHEN, JUN WAI-YAN WONG, STEPHEN SHEI-DEI YANG, CHENG-HSING HSIEH, and CHUNG-CHENG WANG CHENYUNG-TAI CHEN More articles by this author , CHENJUN WONGWAI-YAN WONG YANGSTEPHEN YANG HSIEHCHENG-HSING HSIEH WANGCHUNG-CHENG View All Author...

10.1016/s0022-5347(05)65066-5 article EN The Journal of Urology 2002-05-01

ABSTRACT Aim Neurodegenerative diseases are characterized by early increased beta‐amyloid (Aβ) and decreased cerebrovascular reactivity. We investigated Aβ in gingiva, serum or hippocampus neurovascular reactivity basilar artery (BA) of periodontitis rats, to test the impact on BA vasoreactivity ex vivo. Materials Methods Periodontitis was induced 32 rats using silk‐ligation. Rats were sacrificed at weeks 0, 1, 2 4. Gingival TNF‐α, IL‐1β quantified via immunoblotting. Alveolar bone...

10.1111/jcpe.14110 article EN Journal Of Clinical Periodontology 2025-01-08

Purpose We hypothesized that by correcting for volume and creating a flow index (FI) we could develop reproducible reliable means to estimate flows in children without the use of nomogram. Our second hypothesis was this corrected FI define objective parameters different curves are described ICCS document. Methods Uroflowmetry 1,268 healthy were analyzed. Quadratic equations using nonlinear regression both sexes generated each set presumed normal voiders (learning data) (NV). The NV test data...

10.1002/nau.22813 article EN Neurourology and Urodynamics 2015-07-14

Purpose: The aim of this study is to report the outcomes infants with febrile urinary tract infections (UTIs) and their associations various risk factors. Materials methods: This a retrospective ≤2-year-old recurrent UTIs who underwent voiding cystourethrography (VCUG) in 2 referral hospitals from April 2011 May 2020. Physical examinations included neurological external genital examination. Four-hour observation was performed, postvoid residual volumes were recorded. Intermittent during...

10.1097/us9.0000000000000062 article EN cc-by-nc-nd Urological Science 2025-03-19

Neurogenic detrusor overactivity (NDO) is a complex condition associated with overactivity, reduced bladder compliance, and high intravesical pressures, potentially leading to urinary tract infections (UTIs) renal impairment. This retrospective study evaluated the safety potential efficacy of botulinum toxin A (BoNT/A) injections in children NDO at single institution. Eighteen pediatric patients (median age: 8.1 years) were followed for median 6.3 years. At follow-up, 77.8% achieved global...

10.3390/toxins17040202 article EN cc-by Toxins 2025-04-17

Aims To investigate the association between obesity and lower urinary tract symptoms (LUTS) in healthy children. Methods Healthy community children (5–12 years) were enrolled to evaluate LUTS voiding function, classified by body mass index as being of normal weight, overweight, or obese. A questionnaire was completed one parent each child included baseline characteristics, Dysfunctional Voiding Symptom Score, obstructive sleep apnea-related symptoms, stressful events, nocturnal enuresis...

10.1002/nau.22532 article EN Neurourology and Urodynamics 2013-11-23

We report the effects of bladder over distention on pediatric voiding function.We enrolled healthy kindergarten children (mean age 4.5 +/- 1.0 years) for 2 observations uroflowmetry and post-void residual urine. Additional were requested if voided volume was less than 50% expected capacity. Post-void assessed within 5 minutes after voiding. A more 20 ml is regarded as increased. Bladder capacity defined plus shown percentage The curves categorized bell-shaped or nonbell-shaped.Among 188 355...

10.1016/j.juro.2008.07.063 article EN The Journal of Urology 2008-11-01

To report the relationship between ages initiating toilet training for urinary continence (TTU) and bladder function in healthy kindergarteners.In 3 years, we evaluated status 318 kindergarteners. Children with congenital anomaly, neurological disorder, or developmental disability were excluded. A parent completed questionnaire including age at initiation duration of TTU, current daytime nighttime continence, attaining frequency defecation Bristol Stool Scale. All children underwent...

10.1002/nau.20982 article EN Neurourology and Urodynamics 2011-03-10

To report the cut-off value for large voided volume (LVV) suggestive of abnormal uroflow pattern or elevated post-void residual urine (PVR) in healthy kindergarteners.From 2003 through 2008, we enrolled 417 kindergarten children evaluation uroflowmetry tests and PVR. The curves were interpreted if volumes (VV) >50 ml, categorized as bell-shaped, staccato, plateau, interrupted. Only bell-shaped normal. After 2006, PVR was assessed within 5 min after each voiding with a VV ml. A >20 ml is...

10.1002/nau.20901 article EN Neurourology and Urodynamics 2010-07-13

Abstract Purpose To investigate the association between constipation and results of uroflowmetry with post‐void residual urine (PVR) tests in healthy children. Materials Methods We enrolled children aged 4 12 years for evaluation voiding defecation function. A parent completed questionnaire, were asked to do PVR. Constipation is defined as frequency ≤2 times/week or type 1–2 stool forms on Bristol scale. Uroflowmetry curve PVR eligible analysis if voided volume was 50 ml expected capacity...

10.1002/nau.21225 article EN Neurourology and Urodynamics 2011-10-28

We compared safety and surgical outcomes in patients with different prostate sizes treated diode laser enucleation of the prostate.From 2008 to 2012 consecutive benign prostatic obstruction undergoing at our institution were enrolled for analysis. A single surgeon performed an end firing, continuous wave (980 nm). Based on preoperative volume transrectal ultrasound, stratified into 2 groups, including group 1-65 less than 60 ml 2-55 or greater. Baseline perioperative characteristics,...

10.1016/j.juro.2012.08.256 article EN The Journal of Urology 2012-09-24
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