Migration resistance of esophageal stents: The role of stent design

Mozafari, Hozhabr; Dong, Pengfei; Zhao, Shijie; Bi, Yonghua; Han, Xinwei; Gu, Linxia

doi:10.1016/j.compbiomed.2018.06.031

Cited by 26 publications

(15 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the barrel-shaped proximal end of the stent plays a positive role in fixing the stent as well. Several kinds of stent flanges, including flared, dumbbell and barrel shapes, have been used in esophageal stents to prevent stent migration, and the anti-migration force of the stent with a barrel-shaped flange was the largest ( 22 , 23 ). In this cohort of patients, stent migration occurred in 1 patient during follow-up, which was similar to a previous study reported on transcordal stents ( 6 ).…”

Section: Discussionmentioning

confidence: 99%

Preliminary Experience With a Novel Metallic Segmented Transcordal Stent Modified With Three-Dimensional Printing for Inoperable Malignant Laryngotracheal Stenosis

et al. 2021

View full text Add to dashboard Cite

BackgroundThis study aims to assess the feasibility of a novel metallic segmented transcordal stent modified with three-dimensional (3D) printing for treating inoperable malignant laryngotracheal stenosis and the tolerability of the stent.MethodsThis was a retrospective study. The stents were individually customized with the aid of 3D printing model based on the anatomic features of each patient’s airway. The stent was composed of two separate segments that corresponded to the larynx and the upper trachea. The stents were barrel-shaped at the proximal end to prevent migration. The proximal end of the stent was located slightly above the vocal cord. The technical and clinical success of stenting procedure, patient tolerability, and stent-related complications of patients were evaluated.ResultsTen patients with dyspnea caused by malignant laryngotracheal stenosis underwent implantation of such stents. Technical and clinical success of the stenting procedure were achieved in all patients. For all patients, basic communication in life could be maintained by speaking softly. During follow-up, one patient showed intolerance to the stent, and the stent was retrieved 2 weeks after stenting. Stent migration was found in one patient, and the position of the stent was readjusted. Granulation tissue proliferation was found in two patients and was treated with cryotherapy by bronchoscopy. There were no deaths associated with stenting.ConclusionsThe individually customized metallic segmented transcordal stent is feasible and tolerable for patients with inoperable malignant laryngotracheal stenosis. The implantation of this stent may serve as a novel alternative treatment for patients who are not suitable for surgery or tracheotomy.

show abstract

Section: Discussionmentioning

confidence: 99%

Preliminary Experience With a Novel Metallic Segmented Transcordal Stent Modified With Three-Dimensional Printing for Inoperable Malignant Laryngotracheal Stenosis

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Migration behaviors observed in clinical practices [22,23] were not considered in this work. It has been shown that a larger radial/bending strength, correlated with higher contact force between stent and the lesion, could mitigate the migration of a straight stent [24]. The concern of migration was much relieved for both the J-and Y-shaped stents, because each junction configuration, itself, constrained the migration of the stent in a bifurcated lesion [25].…”

Section: Discussionmentioning

confidence: 99%

Experimental evaluation of self-expandable metallic tracheobronchial stents

Wang

Dong

et al. 2019

Nanotechnology Reviews

Self Cite

View full text Add to dashboard Cite

The self-expandable metallic stents have been widely used in tracheobronchial obstruction or fistulation, including the J-shaped and Y-shaped stents, named after the shape of the branch-stem junction of the stent. However, there is scarce data on the mechanical performance of these tracheobronchial stents, which is essential for optimal stent implantation. In this work, eight self-expandable metallic tracheobronchial stents in three types (i.e., straight, J-shaped, and Y-shaped), with or without cover, were characterized. The compression resistance of the stems was investigated through both compression and indentation tests. The bending resistance of the branches in the J-shaped and Y-shaped stents was assessed through the bending test. Our results demonstrated that the covered stents exhibited a significantly higher compression resistance and bending resistance than the uncovered ones. The branches had a minimal impact on the compression resistance of the stem. The branch of the J-shaped stent showed a significantly lower bending resistance than the Y shaped one. This work provides a testing framework for the J-shaped and Y-shaped stents,which could shed some light on the optimal design of stent with branches.

show abstract

“…The analysis of the antimigration performance of the stent shows that two standard antimigration methods include structural migration design 2,21,36 and external clinical aids. 37 However, the former leads to complications such as esophageal pain, perforation, and fistula; the latter requires a longer operation time and superior suture technology.…”

Section: Antimigration Functionmentioning

confidence: 99%

“…The other is designing segmental stents to reduce the axial force through structural changes and increase the friction coefficient and contact force of the stent surface. 14,21 The design should balance several mechanical properties of the stents to avoid complications.…”

mentioning

confidence: 99%

Effect of NiTi parameters on the mechanical properties of integrated braided stents

Liu

Tao

et al. 2022

Textile Research Journal

View full text Add to dashboard Cite

Stent insertion can serve as an effective therapy method for patients with esophageal stricture but stents with inappropriate mechanical properties lead to restenosis. To prepare a stent matching the esophageal environmental mechanics, both the NiTi spring yarn and polyester multifilament were used to produce seven kinds of stents by braiding technology. The mechanical properties of the stents were tested including compression, flexibility, and antimigration behavior. Results showed that three different parameters including spring consistency with tracks, spring content, and spring pitch altered the effective number of coils and elastic modulus, and affected the compression strength, flexibility and migration resistance of the stent. In particular, the integrated braided stent with full consistency, 12 NiTi spiral yarns, and spring pitch of 1.00 mm had the best mechanical properties among all the prototypes in this research. The compression strength, bending strength, and migration resistance were 1048.75 cN, 46.35 cN, and 3.74 N, respectively. In summary, this research presents a new preparation method for esophageal stent manufacture in the treatment of inoperable esophageal malignancies.

show abstract

Migration resistance of esophageal stents: The role of stent design

Cited by 26 publications

References 40 publications

Preliminary Experience With a Novel Metallic Segmented Transcordal Stent Modified With Three-Dimensional Printing for Inoperable Malignant Laryngotracheal Stenosis

Preliminary Experience With a Novel Metallic Segmented Transcordal Stent Modified With Three-Dimensional Printing for Inoperable Malignant Laryngotracheal Stenosis

Experimental evaluation of self-expandable metallic tracheobronchial stents

Effect of NiTi parameters on the mechanical properties of integrated braided stents

Contact Info

Product

Resources

About