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Wu W, Yip J, Tang YD, Khoo V, Kong JF, Duong-Hong D, Boey F, Venkatraman SS. A Novel Biodegradable Septal Defect Occluder the “Chinese Lantern” Design, Proof of Concept. INNOVATIONS-TECHNOLOGY AND TECHNIQUES IN CARDIOTHORACIC AND VASCULAR SURGERY 2011. [DOI: 10.1177/155698451100600403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Wei Wu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - James Yip
- Cardiac Department, National University Hospital, Singapore, Singapore
| | - Yong-Dan Tang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Vincent Khoo
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Jen Fong Kong
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Duc Duong-Hong
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Freddy Boey
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Subbu S. Venkatraman
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
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A Novel Biodegradable Septal Defect Occluder the “Chinese Lantern” Design, Proof of Concept. INNOVATIONS-TECHNOLOGY AND TECHNIQUES IN CARDIOTHORACIC AND VASCULAR SURGERY 2011; 6:221-30. [DOI: 10.1097/imi.0b013e31822a2c42] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Objective Atrial septal defect (ASD) is a general term used to describe an opening in the atrial septum that divides the two atria; unless the hole is occluded, it can give rise to serious complications. Given the need for percutaneous deployment for ASD or patent foramen ovale (PFO) occluders, all currently available devices are made of metals (specifically nitinol) and synthetic fabric. However, their permanent presence in the human body is not desirable due to the risks of long-term allergy, toxicity, and complications such as thrombus formation, device arm fracture, and nickel allergy. Once the hole is covered by a newly regenerated tissue, the device is no longer needed; thus it is ideal if the device is fully absorbed by the body when healing is completed. Methods The “Chinese Lantern” device is made of fully biodegradable polymers featured with a unique pull-fold mechanism. The device was inserted across the ASD/PFO model created on Yorkshire swines through a short sheath by hybrid open surgery. X-ray imaging, echocardiography, and postmortem histopathology were obtained during the 1-month follow-up study period. Results X-ray imaging showed that the devices were in satisfactory position and stable. Echocardiography showed that there is no shunting from the right atrium to the left atrium, indicating excellent sealing. The in vitro degradation study and postmortem explantation study confirmed that the devices have good integrity during the 1-month trial. Furthermore, the devices appeared to be completely endothelialized after 1 month. Conclusions This work proves the feasibility of interventional closure of ASD or PFO with an innovative biodegradable device, which we call the “Chinese Lantern” for its symbolic design.
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