Numerical analysis of urine flow through the side holes of a double J stent in a ureteral stenosis

Hyoung Ho Kim, Young Ho Choi, Seung Bae Lee, Yasutaka Baba, Kyung Wuk Kim, Sang Ho Suh

Research output: Contribution to journalConference articleResearchpeer-review

2 Citations (Scopus)

Abstract

Ureteral stenosis presents with a narrowing in the ureter, due to an intrinsic or extrinsic ureteral disease, such as ureter cancer or retroperitoneal fibrosis. The placement of a double J stent in the upper urinary system is one of the most common treatments of ureteral stenosis, along with the insertion of a percutaneous nephrostomy tube into the renal pelvis. The effect that the side holes in a double J stent have on urine flow has been evaluated in a few studies using straight ureter models. In this study, urine flow through a double J stent's side holes was analyzed in curved ureter models, which were based on human anatomy. In ureteral stenosis, especially in severe ureteral stenosis, a stent with side holes had a positive effect on the luminal and total flow rates, compared with the rates for a stent without side holes. The more side holes a stent has, the greater the luminal and total flow rates. However, the angular positions of the side holes did not affect flow rate. In conclusion, the side holes in a double J stent had a positive effect on ureteral stenosis, and the effect became greater as the ureteral stenosis became more severe.

Original languageEnglish
Pages (from-to)S63-S72
JournalTechnology and Health Care
Volume25
Issue numberS1
DOIs
StatePublished - 21 Jul 2017
Event5th International Conference on Biomedical Engineering and Biotechnology, ICBEB 2016 - Hangzhou, China
Duration: 1 Aug 20164 Aug 2016

Fingerprint

Stents
Numerical analysis
Pathologic Constriction
Urine
Ureter
Flow rate
Ureteral Diseases
Ureteral Neoplasms
Retroperitoneal Fibrosis
Percutaneous Nephrostomy
Kidney Pelvis
Anatomy

Keywords

  • CFD
  • Numerical analysis
  • Stent
  • Ureter
  • Urine flow

Cite this

Kim, Hyoung Ho ; Choi, Young Ho ; Lee, Seung Bae ; Baba, Yasutaka ; Kim, Kyung Wuk ; Suh, Sang Ho. / Numerical analysis of urine flow through the side holes of a double J stent in a ureteral stenosis. In: Technology and Health Care. 2017 ; Vol. 25, No. S1. pp. S63-S72.
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abstract = "Ureteral stenosis presents with a narrowing in the ureter, due to an intrinsic or extrinsic ureteral disease, such as ureter cancer or retroperitoneal fibrosis. The placement of a double J stent in the upper urinary system is one of the most common treatments of ureteral stenosis, along with the insertion of a percutaneous nephrostomy tube into the renal pelvis. The effect that the side holes in a double J stent have on urine flow has been evaluated in a few studies using straight ureter models. In this study, urine flow through a double J stent's side holes was analyzed in curved ureter models, which were based on human anatomy. In ureteral stenosis, especially in severe ureteral stenosis, a stent with side holes had a positive effect on the luminal and total flow rates, compared with the rates for a stent without side holes. The more side holes a stent has, the greater the luminal and total flow rates. However, the angular positions of the side holes did not affect flow rate. In conclusion, the side holes in a double J stent had a positive effect on ureteral stenosis, and the effect became greater as the ureteral stenosis became more severe.",
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Numerical analysis of urine flow through the side holes of a double J stent in a ureteral stenosis. / Kim, Hyoung Ho; Choi, Young Ho; Lee, Seung Bae; Baba, Yasutaka; Kim, Kyung Wuk; Suh, Sang Ho.

In: Technology and Health Care, Vol. 25, No. S1, 21.07.2017, p. S63-S72.

Research output: Contribution to journalConference articleResearchpeer-review

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AU - Kim, Hyoung Ho

AU - Choi, Young Ho

AU - Lee, Seung Bae

AU - Baba, Yasutaka

AU - Kim, Kyung Wuk

AU - Suh, Sang Ho

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N2 - Ureteral stenosis presents with a narrowing in the ureter, due to an intrinsic or extrinsic ureteral disease, such as ureter cancer or retroperitoneal fibrosis. The placement of a double J stent in the upper urinary system is one of the most common treatments of ureteral stenosis, along with the insertion of a percutaneous nephrostomy tube into the renal pelvis. The effect that the side holes in a double J stent have on urine flow has been evaluated in a few studies using straight ureter models. In this study, urine flow through a double J stent's side holes was analyzed in curved ureter models, which were based on human anatomy. In ureteral stenosis, especially in severe ureteral stenosis, a stent with side holes had a positive effect on the luminal and total flow rates, compared with the rates for a stent without side holes. The more side holes a stent has, the greater the luminal and total flow rates. However, the angular positions of the side holes did not affect flow rate. In conclusion, the side holes in a double J stent had a positive effect on ureteral stenosis, and the effect became greater as the ureteral stenosis became more severe.

AB - Ureteral stenosis presents with a narrowing in the ureter, due to an intrinsic or extrinsic ureteral disease, such as ureter cancer or retroperitoneal fibrosis. The placement of a double J stent in the upper urinary system is one of the most common treatments of ureteral stenosis, along with the insertion of a percutaneous nephrostomy tube into the renal pelvis. The effect that the side holes in a double J stent have on urine flow has been evaluated in a few studies using straight ureter models. In this study, urine flow through a double J stent's side holes was analyzed in curved ureter models, which were based on human anatomy. In ureteral stenosis, especially in severe ureteral stenosis, a stent with side holes had a positive effect on the luminal and total flow rates, compared with the rates for a stent without side holes. The more side holes a stent has, the greater the luminal and total flow rates. However, the angular positions of the side holes did not affect flow rate. In conclusion, the side holes in a double J stent had a positive effect on ureteral stenosis, and the effect became greater as the ureteral stenosis became more severe.

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