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Amundsen, Tore; S?rhaug, Sveinung; Leira, H?kon Olav; Tyvold, Stig Sverre; Lang?, Thomas; Hammer, Tommy; Manstad-Hulaas, Frode; Mattsson, Erney (2016)
Publisher: Co-Action Publishing
Journal: European Clinical Respiratory Journal
Languages: English
Types: Article
Subjects: lung cancer, malignant airway obstruction, Diseases of the respiratory system, airway stent, Original Research Article, RC705-779, Key words: interventional bronchoscopy, airway stent, malignant airway obstruction, SEMS, interventional bronchoscopy
Background: Malignant airway obstruction is a feared complication and will most probably occur more frequently in the future because of increasing cancer incidence and increased life expectancy in cancer patients. Minimal invasive treatment using airway stents represents a meaningful and life-saving palliation. We present a new removable airway stent for improved individualised treatment.Methods: To our knowledge, the new airway stent is the world’s first knitted and uncovered self-expanding metal stent, which can unravel and be completely removed. In an in vivo model using two anaesthetised and spontaneously breathing pigs, we deployed and subsequently removed the stents by unravelling the device. The procedures were executed by flexible bronchoscopy in an acute and a chronic setting – a ‘proof-of-principle’ study.Results: The new stent was easily and accurately deployed in the central airways, and it remained fixed in its original position. It was easy to unravel and completely remove from the airways without clinically significant complications. During the presence of the stent in the chronic study, granulation tissue was induced. This tissue disappeared spontaneously with the removal.Conclusions: The new removable stent functioned according to its purpose and unravelled easily, and it was completely removed without significant technical or medical complications. Induced granulation tissue disappeared spontaneously. Further studies on animals and humans are needed to define its optimal indications and future use.Keywords: interventional bronchoscopy; airway stent; malignant airway obstruction; SEMS; lung cancer(Published: 6 September 2016)Citation: European Clinical Respiratory Journal 2016, 3: 30010 - http://dx.doi.org/10.3402/ecrj.v3.30010

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