Innovative device for low-trauma installation and extraction of the monospiral esophageal stent

Article

Published: 16.10.2025

Published in issue: #10(166)/2025

DOI: 10.18698/2308-6033-2025-10-2479

Category: Mechanics | Chapter: Biomechanics and Bioengineering

Treatment of acute bleeding from the esophageal varices remains a complex problem. Solving it requires development of the new efficient methods and minimally invasive instruments. These include, first and foremost, the methods and instruments for the minimally invasive insertion and removal of elastic monospirals and superelastic self-expanding polyspiral nitinol Danis stents. These stents offer several advantages compared to the common method of the esophageal varices balloon tamponade using the inflatable Sengstaken—Blakemore obturator. The paper presents a comparative analysis of the monospiral and polyspiral compression methods for the esophageal bleeding arrest, and reveals a common drawback associated with the risk of potential injury to the esophageal varices during the stent insertion and removal. To address this drawback, the paper proposes an innovative device for the minimally invasive insertion and retrieval of a monospiral esophageal stent with the controllably deployable and retractable superelastic monocrystalline coil made of the Cu–Al–Ni alloy. It provides an example of implementation of the superelastic monospiral compression on the esophageal simulator.

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