Intraluminal pressure changes in vivo in the middle and distal pig ureter during propagation of a peristaltic wave

Roshani, Hossain; Dabhoiwala, N.F.; Dijkhuis, T.; Lamers, Wouter H.

doi:10.1016/s0090-4295(01)01550-3

Cited by 17 publications

(8 citation statements)

References 11 publications

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“…The duration of the pressure signal was converted in pressure signal length in mm by multiplying duration by propagation velocity. 12 Frequency distribution analysis of our data revealed a natural distribution that justified determination of the mean Ϯ SEM and p value using the 2-tailed unpaired Student t test.…”

Section: Methodssupporting

confidence: 51%

Pharmacological Modulation of Ureteral Peristalsis in a Chronically Instrumented Conscious Pig Model. I: Effect of Cholinergic Stimulation and Inhibition

et al. 2003

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Section: Methodssupporting

confidence: 51%

Pharmacological Modulation of Ureteral Peristalsis in a Chronically Instrumented Conscious Pig Model. I: Effect of Cholinergic Stimulation and Inhibition

et al. 2003

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Section: Discussionmentioning

confidence: 99%

“…In this study, we have shown that measurement of intraluminal ureter pressure by ureteroscopy is non-invasive, convenient, practical and reproducible. It has its speci c characteristics as compared with the other methods [13][14][15].In this study, the individual intraluminal pressure of the ureters di ered in each patient. ese pressure values have been previously shown to depend on the severity and duration of the obstruction [16][17].…”

mentioning

confidence: 99%

A practical pressure measuring method for the upper urinary tract during ureteroscopy

Cai

Li²,

Zhu³

et al. 2012

CIM

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A practical pressure measuring method for the upper urinary tract during ureteroscopy AbstractPurpose: e purpose of this study was to develop and test a method for measuring pressure in the upper urinary tract during ureteroscopic operations and to evaluate its e cacy and clinical signi cance.Methods: A total of 44 patients, each with a ureteral calculus in the proximal ureteral segment, were enrolled in the study group: 21 patients with an acute and 23 with a chronic obstruction. e ureteroscope was passed forward to the upper segment of the obstructed ureter immediately a er the calculus was broken and the intraluminal ureteral pressure was then transmitted along with the irrigant ow (0.9% sodium chloride).Results: e mean ureteral pressures of the acute obstruction subgroup, the chronic obstruction subgroup and the control group were 74.5 mmHg (22-180 mmHg), 32.5 mmHg (9-53 mmHg) and 10.2 mmHg (8-13 mmHg), respectively. A signi cant correlation was found between ureteral pressure and the following indexes: the duration of the obstruction (r=0.985), the diameter of the ureter above the calculus (r=0.878) and the depth of the hydronephrosis of the renal pelvis (r=0.862). No associations were observed between the pressure and the serum creatinine level (r=0.214) or the urinary leukocyte count (r=0.047). e intraluminal pressure correlated with the glomerular ow rate (GFR) of the a ected kidney (r =0.975, P =0.001).Conclusions: is new method is non-invasive, practical and reproducible. Measuring the intraluminal pressure of the ureter can provide a valuable index to quantify the severity of the obstruction of the upper urinary tract, which is helpful for the prediction of the affected renal function prognosis. [3][4][5], which risk invasive renal bleeding and urinary tract infection. Other methods, such as radionuclide renogram, Doppler vessel resistance and intravenous urography [6][7][8][9], lack sensitivity and speci city. A quantitative, non-invasive and e ective method is needed.Recently, ureteroscopy has become a common minimally invasive examination method in the treatment of ureteral calculi [10]. During ureteroscopy, the ureteroscope presses closely to the ureteral wall, and the intraluminal pressure of the ureter can be transmitted along with the owing of the irrigation uid. A er the ureteral calculi are fragmented, the ureteroscope passes the calculus, and the pressure of the ureter is measured by connecting the ureteroscope to a sensitive digital pressure monitor. In this study, we aimed to investigate the feasibility and e cacy of this method in patients with varying severities of calculus obstruction. Materials and Methods Clinical DataFrom July 2010 to July 2011, 44 consecutive patients, including 24 men and 20 women with an average age of 40.2 years (range 18-63 years), were enrolled in the study group. e inclusion criteria were ureteral obstruction caused by ureteral stones, accompanied by hydronephrosis or pyonephrosis. e exclusion criteria were severe de ciency of blood coagulation function and s...

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“…Indeed, active shortening of the longitudinal muscle layer of the transmural and submucosal ureter areas ejects the bolus of urine into the bladder lumen. Functional and structural alterations of ureteric ends seem to impair the active valve mechanism of the VUJ, causing VUR [3,4]. Dysplasia, atrophy and architectural derangement of smooth muscle cells in refluxing ureteric ends appear to be essential for the deficient active valve mechanism [1].…”

Section: Introductionmentioning

confidence: 99%

Altered ‘active’ antireflux mechanism in primary vesico‐ureteric reflux: a morphological and manometric study

et al. 2007

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possibly functions as an 'active' antireflux system, but previous manometric findings on refluxing ureteric units (RUs) have shown altered patterns. In all, 32 RU ends were stained using both picro-Mallory and Sirius Red techniques; in a parallel immunohistochemical procedure, using mast cell tryptase and CD117 antibodies (to identify ICCs), they were compared with eight control ureteric ends. Ureteric manometry of the VUJ was also done during ureteric reimplantation. RESULTSThe histochemical and immunohistochemical results in the RUs showed a replacement of the altered smooth muscle fascicles by collagenous stroma and significant loss of ICCs in RU ends, both correlated with the grade of VUR. Ureteric manometry showed significant impairment of basal and maximum pressure in RUs, correlated, respectively, with histological lesions and loss of ICCs.

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Intraluminal pressure changes in vivo in the middle and distal pig ureter during propagation of a peristaltic wave

Cited by 17 publications

References 11 publications

Pharmacological Modulation of Ureteral Peristalsis in a Chronically Instrumented Conscious Pig Model. I: Effect of Cholinergic Stimulation and Inhibition

Pharmacological Modulation of Ureteral Peristalsis in a Chronically Instrumented Conscious Pig Model. I: Effect of Cholinergic Stimulation and Inhibition

A practical pressure measuring method for the upper urinary tract during ureteroscopy

Altered ‘active’ antireflux mechanism in primary vesico‐ureteric reflux: a morphological and manometric study

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