Computational fluid dynamics modeling approaches to assess lower urinary tract hydraulic dynamics in posterior urethral valve before and after endoscopic valve ablation: a pilot study

2021 ◽  
Author(s):  
Hong-Song Chen ◽  
Xing Liu ◽  
Zhi-Cheng Zhang ◽  
Zi-Han Ye ◽  
Tao Lin ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Urinary Tract ◽  
Lower Urinary Tract ◽  
Posterior Urethral Valve ◽  
Dynamics Modeling ◽  
Computational Fluid Dynamics Modeling ◽  
Before And After ◽  
Urethral Valve ◽  
Lower Urinary

scholarly journals Fetoscopic laser valve ablation in the posterior urethral valve case with intrauterine diagnosis

2020 ◽  
Vol 28 (3) ◽  
pp. 206-211
Author(s):  
Selahattin Kumru ◽  
Serdar Kaya
Keyword(s):  
Urinary Tract ◽  
Lower Urinary Tract ◽  
Urinary Tract Obstruction ◽  
Treatment Options ◽  
Posterior Urethral Valve ◽  
Fetal Ultrasonography ◽  
Lower Urinary Tract Obstruction ◽  
Urethral Valve ◽  
Lower Urinary

Objective: We aimed to present the procedure of intrauterine percutaneous fetoscopic laser valve ablation performed on a fetus diagnosed with lower urinary tract obstruction. Case(s): Bilateral hydroureteronephrosis, dilated bladder and oligo/ anhydramnios were found in the fetal ultrasonography examination of a 21-year-old pregnant woman who did not have regular follow-ups, and the lower urinary tract obstruction consistent with the posterior urethral valve was considered in the case. The patient who was found to have poor prognosis as a result of vesico synthesis carried out consecutively was informed about the follow-up and treatment options, and the posterior urethral valve ablation was performed by the percutaneous fetoscopic laser on 27 weeks of gestation. The amniotic fluid was at normal levels after the procedure, and the labor was carried out at term. The newborn with elevated postpartum creatinine was diagnosed with stage 2 renal failure, but dialysis was not required during the follow-ups. The newborn was discharged for outpatient follow-up upon the reduced creatinine levels. Conclusion: By taking the survival enhancing effect of the intrauterine intervention into account in the presence of lower urinary tract obstruction, we considered that intrauterine intervention can be an option in the cases who prefer to continue their pregnancies. The families should be informed in detail about the benefits and risks of intrauterine intervention to repair the obstruction.

scholarly journals A pilot study of bladder voiding with real-time MRI and computational fluid dynamics

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0238404
Author(s):  
Ryan Pewowaruk ◽  
David Rutkowski ◽  
Diego Hernando ◽  
Bunmi B. Kumapayi ◽  
Wade Bushman ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Urinary Tract ◽  
Real Time ◽  
Lower Urinary Tract ◽  
Bladder Wall ◽  
Bladder Pressure ◽  
Wall Displacement ◽  
Insight Into ◽  
Lower Urinary

Lower urinary track symptoms (LUTS) affect many older adults. Multi-channel urodynamic studies provide information about bladder pressure and urinary flow but offer little insight into changes in bladder anatomy and detrusor muscle function. Here we present a novel method for real time MRI during bladder voiding. This was performed in a small cohort of healthy men and men with benign prostatic hyperplasia and lower urinary tract symptoms (BPH/LUTS) to demonstrate proof of principle; The MRI urodynamic protocol was successfully implemented, and bladder wall displacement and urine flow dynamics were calculated. Displacement analysis on healthy controls showed the greatest bladder wall displacement in the dome of the bladder while men with BPH/LUTS exhibited decreased and asymmetric bladder wall motion. Computational fluid dynamics of voiding showed men with BPH/LUTS had larger recirculation regions in the bladder. This study demonstrates the feasibility of performing MRI voiding studies and their potential to provide new insight into lower urinary tract function in health and disease.

scholarly journals Lower urinary tract obstruction in male children–a report of three cases.

2016 ◽  
Vol 18 (3) ◽  
pp. 400 ◽  
Author(s):  
Donboklang Lynser ◽  
Evarisalin Marbaniang ◽  
Pynskhemboklang Khongsni
Keyword(s):  
Urinary Tract ◽  
Bladder Outlet Obstruction ◽  
Lower Urinary Tract ◽  
Urinary Tract Obstruction ◽  
Outlet Obstruction ◽  
Posterior Urethral Valve ◽  
Urethral Obstruction ◽  
Lower Urinary Tract Obstruction ◽  
Urethral Valve ◽  
Lower Urinary

Urinary retention in young children and infancy is relatively rare. The commonest malignancy cause of bladder outlet obstruction in infancy is prostatic rhabdomyosarcoma; the commonest cause of congenital bladder outlet obstruction in a male infantis posterior urethral valve and the commonest cause of urethral obstruction in male children is urethral calculi. We present here a report on three cases of urethral obstruction in male children. 

Fetal lower urinary tract obstruction: a current overview of intrauterine dia gnosis and treatment

2021 ◽  
Vol 86 (2) ◽  
pp. 133-139
Author(s):  
Ivana Kunochová ◽  
◽  
Martin Gábor ◽  
Marián Križko ◽  
Martin Alföldi ◽  
...  
Keyword(s):  
Urinary Tract ◽  
Lower Urinary Tract ◽  
Urinary Tract Obstruction ◽  
Posterior Urethral Valve ◽  
Perinatal Morbidity ◽  
Review Of Literature ◽  
Lower Urinary Tract Obstruction ◽  
Urethral Valve ◽  
A Current ◽  
Lower Urinary

Overview Objective: The aim of this review article is to provide a practical and concise overview of dia­gnosis and management of pregnancy with fetal lower urinary tract obstruction. Methods: Review of literature and current studies. Conclusion: Proper dia­gnosis and management of isolated fetal lower urinary tract obstruction with oligohydramnios allows appropriate implementation of intrauterine treatment in indicated cases. The treatment is a prevention of pulmonary hypoplasia and also improves renal function; this finally contributes to the improvement of overall perinatal morbidity and mortality. Keywords: fetal lower urinary tract obstruction – posterior urethral valve – vesicoamniotic shunting – fetal cystoscopy

scholarly journals Retraction: Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12531-12531
Author(s):  
Junjie Chen ◽  
Xuhui Gao ◽  
Longfei Yan ◽  
Deguang Xu
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Hydrogen Production ◽  
Steam Reforming ◽  
Methane Steam Reforming ◽  
Dynamics Modeling ◽  
Computational Fluid Dynamics Modeling ◽  
Microchannel Reactors ◽  
Methane Steam

Retraction of ‘Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production’ by Junjie Chen et al., RSC Adv., 2018, 8, 25183–25200, DOI: 10.1039/C8RA04440F.

Sign in / Sign up

Export Citation Format

Share Document