Comparing the mechanical properties of a self‐expandable metallic stent for colorectal obstruction: Proposed measurement method of axial force using a new measurement machine
| Autor: | Hiroyuki Isayama, Toshio Fujisawa, Shuntaro Yoshida, Rei Ishibashi, Chimyon Gon, Takashi Sasaki, Yoshihisa Saida, Yousuke Nakai, Naoki Sasahira, Hiroki Shinagawa |
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| Rok vydání: | 2020 |
| Předmět: |
Measurement method
Mechanical property business.industry medicine.medical_treatment Self Expandable Metallic Stents Gastroenterology Stent 03 medical and health sciences Treatment Outcome 0302 clinical medicine Self-expandable metallic stent 030220 oncology & carcinogenesis Humans Medicine Torque In vitro study Stents 030211 gastroenterology & hepatology Radiology Nuclear Medicine and imaging Axial force Colorectal Neoplasms business Radial Force Variation Mechanical Phenomena Biomedical engineering |
| Zdroj: | Digestive Endoscopy. 33:170-178 |
| ISSN: | 1443-1661 0915-5635 |
| DOI: | 10.1111/den.13671 |
| Popis: | OBJECTIVES Colorectal stenting is widely performed using self-expandable metallic stents (SEMSs), but the mechanical properties have not been evaluated. Therefore, we conducted an in vitro study to evaluate the mechanical properties of colorectal SEMSs. METHODS Eighteen individual types and sizes of uncovered SEMSs were evaluated for their mechanical properties. Radial force was measured using a measurement machine. Axial force (AF) was measured by two methods: a conventional manual method and a new method using a measurement machine. The correlation of these two methods was evaluated. We also proposed an "AF zero border" that was defined as the angle at which the torque force disappeared. RESULTS Radial force versus diameter curves and AF versus angle curves were influenced by the structure and the size of each stent. There was excellent correlation of AFs measured by the new and conventional manual method (y = 21.434x, R = 0.881, P |
| Databáze: | OpenAIRE |
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