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Xu C, Okpokwasili C, Huang Y, Shi X, Wu J, Liao J, Tang L, Hong Y. Optimizing Anisotropic Polyurethane Scaffolds to Mechanically Match with Native Myocardium. ACS Biomater Sci Eng 2020; 6:2757-2769. [PMID: 33313394 PMCID: PMC7725265 DOI: 10.1021/acsbiomaterials.9b01860] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Biodegradable cardiac patch is desirable to possess mechanical properties mimicking native myocardium for heart infarction treatment. We fabricated a series of anisotropic and biodegradable polyurethane porous scaffolds via thermally induced phase separation (TIPS) and tailored their mechanical properties by using various polyurethanes with different soft segments and varying polymer concentrations. The uniaxial mechanical properties, suture retention strength, ball-burst strength, and biaxial mechanical properties of the anisotropic porous scaffolds were optimized to mechanically match native myocardium. The optimal anisotropic scaffold had a ball burst strength (20.7 ± 1.5 N) comparable to that of native porcine myocardium (20.4 ± 6.0 N) and showed anisotropic behavior close to biaxial stretching behavior of the native porcine myocardium. Furthermore, the optimized porous scaffold was combined with a porcine myocardium-derived hydrogel to form a biohybrid scaffold. The biohybrid scaffold showed morphologies similar to the decellularized porcine myocardial matrix. This combination did not affect the mechanical properties of the synthetic scaffold alone. After in vivo rat subcutaneous implantation, the biohybrid scaffolds showed minimal immune response and exhibited higher cell penetration than the polyurethane scaffold alone. This biohybrid scaffold with biomimetic mechanics and good tissue compatibility would have great potential to be applied as a biodegradable acellular cardiac patch for myocardial infarction treatment.
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Affiliation(s)
- Cancan Xu
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Chuka Okpokwasili
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yihui Huang
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Xiaodan Shi
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jinglei Wu
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jun Liao
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Liping Tang
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yi Hong
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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Nakamura K, Uchida T, Hamasaki A, Sadahiro M. Batista Procedure with the Aid of Intraoperative Epicardial Echocardiography. Braz J Cardiovasc Surg 2020; 35:225-228. [PMID: 32369304 PMCID: PMC7199988 DOI: 10.21470/1678-9741-2019-0298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Introduction The number of cases for which the Batista procedure is indicated is small, but some patients with appropriate indication can achieve good therapeutic results. Objective To avoid incorrect left ventricular incision and obtain good surgical results in patients with dilated cardiomyopathy suitable for partial left ventriculectomy, we employed intraoperative direct echocardiography to determine the exact extent and position of the myocardial incision, even for surgeons who are not very experienced with the Batista procedure. Methods A 72-year-old man with dilated cardiomyopathy underwent the Batista procedure with the aid of epicardial echocardiography to confirm the location of both the papillary muscles and the diseased myocardium. Results We were able to accurately perform left ventricular incision and remove the diseased lateral ventricular wall. Two years later, the patient had no symptoms of heart failure, and his brain natriuretic peptide (BNP) level decreased from 1155 to 49.3 pg/mL. Conclusions We believe that the use of intraoperative echocardiography may have the potential to make the Batista procedure less technically demanding and more reproducible for surgeons with little experience in the procedure.
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Affiliation(s)
- Ken Nakamura
- Nihonkai General Hospital Department of Cardiovascular Surgery Yamagata Sakata Japan Department of Cardiovascular Surgery, Nihonkai General Hospital, Yamagata, Sakata, Japan
| | - Tetsuro Uchida
- Yamagata University Faculty of Medicine Department of Surgery II Yamagata Japan Department of Surgery II, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Azumi Hamasaki
- Yamagata University Faculty of Medicine Department of Surgery II Yamagata Japan Department of Surgery II, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Mitsuaki Sadahiro
- Yamagata University Faculty of Medicine Department of Surgery II Yamagata Japan Department of Surgery II, Yamagata University Faculty of Medicine, Yamagata, Japan
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