The Effects of Double J Stenting on Unobstructed Ureters. An Experimental and Clinical Study*

Ramsay, J. W. A.; Payne, S. R.; Gosling, P. T.; Whitfield, H. N.; Wickham, J. E. A.; Levison, D. A.

doi:10.1111/j.1464-410x.1985.tb07021.x

Cited by 157 publications

(69 citation statements)

References 6 publications

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“…The increased intrapelvic renal pressure, especially while voiding, explains this greater incidence of pain. Ramsay et al demonstrated in a porcine model that ureteral intubation causes an increase in intrapelvic renal pressure while voiding [10].…”

Section: Discussionmentioning

confidence: 99%

Infant Feeding Tube Is Better Option of Dj Stent for Uncomplicated Urs: Our Experience

Biswas¹,

Narang²,

Jaideep³

et al. 2017

Int J Surg Med

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Objective: To determine the role of infant feeding tube (IFT) as a better alternative to DJ stent after uncomplicated ureteroscopic removal of stone. Material and Methods: Between March 2008 to March 2016 a prospective study was done in 1000 patients with a stone in the ureter that underwent surgery. The patients divided into 2 groups, group I included 500 patients who were inserted infant feeding tube after URS, and group II consisted 500 patients who received DJ stent after URS. We removed infant feeding tube within 24 hours and DJ stent after ten days. The outcome of all patients was analysed. Results: Four hundred and eighty patients withstand the IFT well, four patients i.e. 1.6% (three females, one male) complained of pain in the flank, for that DJ stenting was done. While 342 (68.4%) patients with DJ stent returned with irritative symptoms, pain abdomen (25), fever (68), hematuria (12), migration of stent (2), incontinence (4). Conclusion: Patients with IFT after URS develop no stent-related complications as seen with DJ stent they are much better tolerable.KEYWORDS: Infant Feeding Tube, DJ stent, URS, ( DJ stent-double J stent, URS-ureteroscopic removal of stone) HOW TO CITE THIS ARTICLEBiswas M, Narang S, Mahajani J, Mahajan R. Infant feeding tube is better option of dj stent for uncomplicated urs: our experience.

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Section: Discussionmentioning

confidence: 99%

Infant Feeding Tube Is Better Option of Dj Stent for Uncomplicated Urs: Our Experience

Biswas¹,

Narang²,

Jaideep³

et al. 2017

Int J Surg Med

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“…Maintaining urine flow with a stent seems to depend mainly on extraluminal flow supported by a double J stent, preventing total ureteral occlusion [5,13]. If the stent could not maintain the extraluminal space, the role of the stent in urine flow rate becomes too small, because the luminal flow out of the total flow in the stented ureter is very small.…”

Section: Luminal and Extraluminal Flow Rates And Patternsmentioning

confidence: 99%

“…Although ureteral stents are inserted to relieve the stagnation of urine flow due to the stenosis or occlusion of the ureter, indwelling of a ureteral stent itself could be a factor of insufficient urine flow [5][6][7] because it prevents peristalsis in the upper urinary tract, as well as results in the loss of effective ureteral peristalsis in the end. Previous studies [8][9][10][11][12] evaluated the urine flow in a stented ureter using the model of a straight ureter and a double J stent.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the urine flow in a stented ureter with no peristalsis

Kim

Choi

Lee

et al. 2015

BME

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Abstract.A ureteral stenosis or occlusion causes the disturbance of normal urine flow and results in renal failure. Ureteral stents are used to relieve the stagnation of urine in the upper urinary tract. Peristalsis in the ureter, which occurs to help urine flow, becomes to weaken when a stent is inserted and effective peristalsis disappears as time goes on, and a stented ureter seems to be tubular and curved in the human body. Double J stents, which are manufactured by many medical companies and are used widely these days, have different geometries of side holes in the stent shafts. In total, 12 models-six curved models of a stented ureter according to different numbers and positions of side holes and ureteral and stent stenoses and another six straight models for comparison with the curved ones-were made based on the data collected from 19 men. The flow rate and pattern in the stented ureter were evaluated using computational fluid dynamics (CFD). According to the results, curved models reflecting the human anatomy seem to be more desirable in the CFD simulation of urine flow and must be good for evaluating the effect of geometrical variations in stent design on urine flow.

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“…However, to our knowledge both peristaltic and differential pressure has yet not been addressed in the literature of stented ureters. In the presence of a stent, peristalsis is greatly inhibited and is sometimes considered negligible in comparison to the propulsive pressure gradient between the kidney and bladder [2,10,13]. Though, on an all-encompassing scale, just the slightest reflux could result in serious infection, a critical scenario potentially realized in the presence of peristalsis.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Peristaltic Urine Flow in a Stented Ureter

Bevan¹,

Carriveaul²,

Goneau

et al. 2012

Am. J. Biomed. Sci.

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The capacity of ureteral stents to enhance the conveyance of urine from kidney to bladder is the critical function for patients that require them. The flow path in and around the stent is not a trivial one, particularly if some elements of peristalsis are present in the ureter. This paper details a numerical flow simulation for an axially symmetric stented ureter segment. The flow of urine through a stented, elastically-modeled ureter was considered under varying pressure gradients, bore (lumen) obstructions, and peristaltic deflections (waves). Peristaltic waves are combined with the pressure gradient developed between the kidney and bladder to provide a more accurate representation of the complex flow mechanics found within the ureter. Although it is recognized that peristalsis ceases or diminishes greatly after prolonged presence of a stent, in the time frame that it is active, detrimental consequences like reflux may occur. Several relationships from varying control parameters are determined to predict the onset of reflux as flow conditions within the ureter change. It was determined that occurrence of reflux is more likely as the peristaltic deflection or the obstruction of the stent bore increases. The threat of reflux is low if the pressure gradient between the kidney and bladder remains large. These simulations provide insight into the fluid behaviour within a stented ureter that could lead to optimized stent designs and reduce the possibility of reflux, infection, and discomfort.

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The Effects of Double J Stenting on Unobstructed Ureters. An Experimental and Clinical Study*

Cited by 157 publications

References 6 publications

Infant Feeding Tube Is Better Option of Dj Stent for Uncomplicated Urs: Our Experience

Infant Feeding Tube Is Better Option of Dj Stent for Uncomplicated Urs: Our Experience

Numerical analysis of the urine flow in a stented ureter with no peristalsis

Numerical Simulation of Peristaltic Urine Flow in a Stented Ureter

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