{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T09:57:46Z","timestamp":1790762266195,"version":"4.1.0"},"reference-count":100,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T00:00:00Z","timestamp":1790726400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Bioeng. Biotechnol."],"abstract":"<jats:p>Hemodialysis-related left brachiocephalic vein stenosis is usually managed as one local variant of central venous stenosis, yet its mechanical environment is distinctive. The vein follows a long, multi-axially curved retrosternal course through a narrow window between the manubrium and the aortic arch, bounded by two separate junctions, the lateral venous angle and the medial brachiocephalic\u2013caval confluence. An implanted stent is therefore exposed to focal unidirectional compression, cyclic bending and torsion, short landing zones, and branch-coverage risk, conditions not reproduced by circumferential radial testing. The sternum\u2013aortic corridor reported in affected patients, about 4.6\u00a0mm, is narrower than the nominal diameter of stents deployed there, placing the implied compression at or beyond the lowest level characterized in published bench comparisons; pulsatile durability testing covers only cardiac-frequency diametric cycling, and pooled cohorts seldom report the segment separately. This Review synthesizes published anatomical, clinical, engineering, and computational evidence and reframes the problem as a site-specific biomechanical and device-validation question with three validation priority stages (P1\u2013P3). P1 (required) evaluates base-platform mechanics, structure, fatigue, and deployment: focal crush resistance and recovery, radial resistive versus chronic outward force, bending and torsion durability, foreshortening, deployment accuracy, branch preservation and, for covered constructs, covering fatigue. P2 (required) evaluates anatomy-specific hemodynamics of the same platform by patient-specific computational modeling and experimental flow testing, reporting shear, residence, gradient, edge-recirculation, branch-flow, and pressure-loss metrics against matched comparators. P3 (optional) covers an added drug, coating, or surface; baseline thrombogenicity, hemocompatibility, tissue compatibility, and structural integrity remain required base-platform attributes. We state two falsifiable hypotheses with the bench, computational, imaging, and clinical evidence that would support or refute them: H1 (mechanical), that resistance to focal unidirectional crush may govern stent deformation, durability, and in-stent restenosis localization more strongly than circumferential radial resistive force alone; and H2 (hemodynamic), that stent architecture and edge configuration may generate spatially reproducible disturbed-flow regions adding incremental prediction of later in-stent restenosis distribution beyond anatomical and procedural covariates. Direct prospective evidence remains sparse: the framework is a problem definition and validation roadmap, not a clinical algorithm, device ranking, or evidence of superior performance.<\/jats:p>","DOI":"10.3389\/fbioe.2026.1961298","type":"journal-article","created":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T08:54:51Z","timestamp":1790758491000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Stent biomechanics in hemodialysis-related left brachiocephalic vein stenosis: from site-specific loading to a staged device-validation framework"],"prefix":"10.3389","volume":"14","author":[{"given":"Shanyuan","family":"Jin","sequence":"first","affiliation":[{"name":"Dalian Medical University","place":["Dalian, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chuhan","family":"Chen","sequence":"additional","affiliation":[{"name":"Dalian Medical University","place":["Dalian, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guiye","family":"Na","sequence":"additional","affiliation":[{"name":"Department of Orthopedics, The People\u2019s Hospital of Lvshunkou District","place":["Dalian, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lin","family":"Guo","sequence":"additional","affiliation":[{"name":"Dalian Medical University","place":["Dalian, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li","family":"Dai","sequence":"additional","affiliation":[{"name":"Department of Vascular Surgery, The Second Affiliated Hospital of Dalian Medical University","place":["Dalian, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bing","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Vascular Surgery, The Second Affiliated Hospital of Dalian Medical University","place":["Dalian, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,9,30]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"228","DOI":"10.1016\/j.krcp.2015.10.005","article-title":"Endovascular interventions for central vein stenosis","volume":"34","author":"Agarwal","year":"2015","journal-title":"Kidney Res. 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