Knotted Upper End: a New Complication in the Use of an Indwelling Ureteral Stent

Kundargi, P.; Bansal, Manish; Pattnaik, Premanand

doi:10.1016/s0022-5347(17)35146-7

Cited by 26 publications

(16 citation statements)

References 6 publications

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“…As regards double-J stents, stent migration with subsequent excess catheter length was described in two cases. [68] In our case the stent length was excessive because of the segmental ureterectomy and bladder psoas hitch. For double-J stents, the excess of tubing length in one of the extremities could, therefore, be considered the main factor contributing to knotting.…”

Section: Discussionmentioning

confidence: 77%

A knotted ureteral stent: A case report and review of the literature

Picozzi¹,

Carmignani²

2010

Urol Ann

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The indications for ureteral stent placement have expanded significantly with the progress of surgical procedures and techniques. Although such stents are now an integral part of contemporary urological practice, their use is not free of complications and consequences. There are very rare descriptions of knot formation in a ureteral stent and the consequences of this occurrence, with only 12 cases previously reported. Here, we report an additional case and review all the literature concerning this urological complication with emphasis on its predisposing factors and conservative and surgical management.

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Section: Discussionmentioning

confidence: 77%

A knotted ureteral stent: A case report and review of the literature

Picozzi¹,

Carmignani²

2010

Urol Ann

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“…Several techniques have been described for removal of knotted stents (12)(13)(14). At the end of ureteroscopy, if the ureteroscope has reached the renal pelvis, the risks of stent knotting and perforation of the urinary tract appear to Retrograde placement of double-J stent with grasping forceps via ureteroscope working channel.…”

Section: Discussionmentioning

confidence: 99%

Double-J stent placement with grasping forceps through ureteroscope working channel: a novel technique

Koç¹,

Bayrak²

2013

Turk J Med Sci

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Th e accurate estimation of tree biomass is crucial for the effi cient management of forest resources. In this study, we used a subsampling method for unbiased estimates of above-ground tree biomass. Th e method consists of 2 stages: the fi rst stage consists of randomized branch sampling (RBS) and the second stage uses importance sampling (IS). RBS is used to select a path from the butt of an object branch to a terminal segment. IS is used for selecting a disk that produces unbiased estimates of the fresh biomass of tree. In this study, the subsampling method was tested on 14 black pine sample trees (Pinus nigra Arnold subsp. pallasiana (Lamb.) Holmboe) in order to estimate the trees' biomass quickly and easily. Th e results showed a wide range of sampling error per tree, ranging from 2.51% to 22.63%. However, the sampling error for the total biomass of the 14 trees tested was only 2.65%. Th e proposed 2-stage sampling method generally performed better for the bole biomass than the branch biomass. Th ese results indicated that the proposed 2-stage sampling method is eff ective and might overcome many of the identifi ed constraints in biomass estimation. It is a viable alternative to the current methods used in Turkey.

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“…The knots have occurred in both double and single-J stents and have been reported in the upper and lower end as well as the ureteric portion [3,4,5,6,7]. Das and Wickham [6] felt that the redundant length of a single-J stent was the cause of knotting whilst the extra coils of a variable or multilength stent may also increase the risk of knot formation [3,6,7]. A variety of techniques to deal with knotted stents have been described but none of these have been reported in children [3,5].…”

Section: Discussionmentioning

confidence: 99%

“…Knotting of stents is a rare complication and only a small number of cases have been reported [3,4,5,6,7]. The knots have occurred in both double and single-J stents and have been reported in the upper and lower end as well as the ureteric portion [3,4,5,6,7]. Das and Wickham [6] felt that the redundant length of a single-J stent was the cause of knotting whilst the extra coils of a variable or multilength stent may also increase the risk of knot formation [3,6,7].…”

Section: Discussionmentioning

confidence: 99%