scholarly journals Urine Flow Dynamics Through Prostatic Urethra With Tubular Organ Modeling Using Endoscopic Imagery

2014 ◽  
Vol 2 ◽  
pp. 1-9 ◽  
Author(s):  
Takuro Ishii ◽  
Yoichi Kambara ◽  
Tomonori Yamanishi ◽  
Yukio Naya ◽  
Tatsuo Igarashi
Keyword(s):  
Urine Flow ◽  
Flow Dynamics ◽  
Prostatic Urethra ◽  
Organ Modeling

scholarly journals Novel CFD modeling approaches to assessing urine flow in prostatic urethra after transurethral surgery

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bin Zhang ◽  
Shuang Liu ◽  
Yinxia Liu ◽  
Bo Wu ◽  
Xuhui Zhang ◽  
...  
Keyword(s):  
Flow Behavior ◽  
Urine Flow ◽  
Prostatic Urethra ◽  
Dynamics Simulation ◽  
Cfd Modeling ◽  
Transverse Diameter ◽  
Cfd Models ◽  
Post Surgery ◽  
Through Flow ◽  
Urethral Orifice

AbstractAssessment of the pressure and velocity of urine flow for different diameter ratios of prostatic urethra (RPU) after transurethral surgery using computational fluid dynamics (CFD). A standardized and idealized two-dimensional CFD model after transurethral surgery (CATS-1st) was developed for post-surgery mid-voiding. Using CATS-1st, 210 examples were amplified according to an array of size [3][5][14], which contained three groups of longitudinal diameters of prostatic urethra (LD-PU). Each of these groups contained five subgroups of transverse diameters of the bladder neck (TD-BN), each with 14 examples of transverse diameters of PU (TD-PU). The pressure and velocity of urine flow were monitored through flow dynamics simulation, and the relationship among RPU-1 (TD-PU/TD-BN), RPU-2 (RPU-1/LD-PU), the transverse diameter of the vortex, and the midpoint velocity of the external urethral orifice (MV-EUO) was determined. A total of 210 CATS examples, including CATS-1st examples, were analyzed. High (bladder and PU) and medium/low (the rest of the urethra) pressure zones, and low (bladder), medium (PU), and high (the rest of the urethra) velocity zones were determined. The rapid changes in the velocity were concentrated in and around the PU. Laminar flow was present in all the examples. The vortices appeared and then gradually shrank with reducing RPU on both the sides of PU in 182 examples. In the vortex examples, minimum RPU-1 and RPU-2 reached close to the values of 0.79 and 0.02, respectively. MV-EUO increased gradually with decreasing RPU. In comparison to the vortex examples, the non-vortex examples exhibited a significantly higher (p < 0.01) MV-EUO. The developed CFD models (CATS) presented an effective simulation of urine flow behavior within the PU after transurethral surgery for benign prostatic hyperplasia (BPH). These models could prove to be useful for morphological repair in PU after transurethral surgery.

The role of the sinuses of valsalva in aortic root flow dynamics and aortic root surgery

2007 ◽  
Vol 55 (S 1) ◽  
Author(s):  
F Schoenhoff ◽  
C Loupatatzis ◽  
FS Eckstein ◽  
C Stoupis ◽  
FF Immer ◽  
...  
Keyword(s):  
Aortic Root ◽  
Flow Dynamics ◽  
Aortic Root Surgery

EFFECTS OF ARGININE-, LYSINE- AND LEUCINE-VASOPRESSIN ON URINARY OSMOLALITY AND RATE OF URINE FLOW IN HYDRATED RATS AND DOGS

1959 ◽  
Vol XXXII (I) ◽  
pp. 134-141 ◽  
Author(s):  
Niels A. Thorn
Keyword(s):  
Arginine Vasopressin ◽  
Urine Osmolality ◽  
Urine Flow ◽  
The Other ◽  
Maximum Increase ◽  
Urinary Osmolality ◽  
Lysine Vasopressin

ABSTRACT Arginine-, lysine- and leucine-vasopressin, injected i. v. into hydrated rats or dogs caused different patterns of response in that urine osmolality fell much more slowly after the maximum increase following arginine-vasopressin, than after the other two preparations. Using 3 different parameters for antidiuretic response, arginine-vasopressin was somewhat more potent than leucine-vasopressin in both rats and dogs, considerably more potent than lysine-vasopressin in rats, and much more so in dogs.

A Dog with Dysuria Caused by Foreign Body Obstruction in the Prostatic Urethra

2012 ◽  
Vol 42 (3+4) ◽  
pp. 39-43
Author(s):  
Nobuyuki KAMISHIMA ◽  
Mika MISHINA ◽  
Toshifumi WATANABE
Keyword(s):  
Foreign Body ◽  
Prostatic Urethra ◽  
Foreign Body Obstruction

Role of Uttarabasti in the management of Functional Bladder Outlet Obstruction: A Case Study

2017 ◽  
Vol 2 (3) ◽  
Author(s):  
Jaimin R. Patel
Keyword(s):  
Bladder Outlet Obstruction ◽  
Outlet Obstruction ◽  
Urine Flow ◽  
Complete Relief ◽  
Urinary Flow ◽  
Detrusor Sphincter Dyssynergia ◽  
Symptom Appraisal ◽  
Prostatic Enlargement ◽  
Normal Urine ◽  
Outflow Channel

Bladder outlet obstruction (BOO) produces compression or resistance upon the bladder outflow channel at any location from the bladder neck to urethral meatus. It may be induced by specific functional and anatomic causes. Functional obstruction may be caused by detrusor-sphincter dyssynergia (DSD) and anatomic obstruction most commonly from benign prostatic enlargement (BPH) or urethral stricture. Obstructive symptoms include hesitancy, sensation of incomplete bladder emptying, diminished urinary stream. The combination of PVR, urinary flow measures, and symptom appraisal has been generally accepted as the initial screening and evaluation paradigm for BOO. In, Ayurveda, BOO is similar to Mutraghata means obstruction in the urine flow. Uttarbasti is the prime treatment of Mutraghata. Present case is diagnosed as a functional bladder outlet obstruction (BOO) on the basis of symptoms, normal reports of USG and ascending urethrogram and diminished flow of urine in Uroflowmetry. Total 7 Uttarbasti with 50ml Sahcharadi Tailam was given along with Rasayana and Mutraghatahara medicine. Patient has complete relief in his obstructive urine complains and has normal urine flow without taking Tab. AFDURA after 7 years. And also improvement appear in Uroflowmetry.

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