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Meng S, Mao J, Rouse EN, Le-Bel G, Bourget JM, Reed RR, Philippe E, How D, Zhang Z, Germain L, Guidoin R. The Red Kangaroo pericardium as a material source for the manufacture of percutaneous heart valves. Morphologie 2019; 103:37-47. [PMID: 30638803 DOI: 10.1016/j.morpho.2018.12.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 12/06/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND The kangaroo pericardium might be considered to be a good candidate material for use in the manufacture of the leaflets of percutaneous heart valves based upon the unique lifestyle. The diet consists of herbs, forbs and strubs. The kangaroo pericardium holds an undulated structure of collagen. MATERIAL AND METHOD A Red Kangaroo was obtained after a traffic fatality and the pericardium was dissected. Four compasses were cut from four different sites: auricular (AUR), atrial (ATR), sternoperitoneal (SPL) and phrenopericardial (PPL). They were investigated by means of scanning electron microscopy, light microscopy and transmission electron microscopy. RESULTS All the samples showed dense and wavy collagen bundles without vascularisation from both the epicardium and the parietal pericardium. The AUR and the ATR were 150±25μm thick whereas the SPL and the PPL were thinner at 120±20μm. The surface of the epicardium was smooth and glistening. The filaments of collagen were well individualized without any aggregation, but the banding was poorly defined and somewhat blurry. CONCLUSION This detailed morphological analysis of the kangaroo pericardium illustrated a surface resistant to thrombosis and physical characteristics resistant to fatigue. The morphological characteristics of the kangaroo pericardium indicate that it represents an outstanding alternative to the current sources e.g., bovine and porcine. However, procurement of tissues from the wild raises supply and sanitary issues. Health concerns based upon sanitary uncertainty and reliability of supply of wild animals remain real problems.
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Affiliation(s)
- S Meng
- Chongqing Key Lab of Catalysis and Functional Organic Molecules; College of Environment and Biotechnology, Chongqing Technology and Business University, Chongqing, PR China
| | - J Mao
- Axe Médecine Régénératrice, Centre de Recherche du CHU and Département de Chirurgie, Faculté de Médecine, Université Laval, Québec Canada
| | - E N Rouse
- Department of Comparative Medicine, College of Veterinary of Tennessee, Knoxville, TN, USA
| | - G Le-Bel
- Axe Médecine Régénératrice, Centre de Recherche du CHU and Département de Chirurgie, Faculté de Médecine, Université Laval, Québec Canada
| | - J M Bourget
- Axe Médecine Régénératrice, Centre de Recherche du CHU and Département de Chirurgie, Faculté de Médecine, Université Laval, Québec Canada
| | - R R Reed
- Department of Comparative Medicine, College of Veterinary of Tennessee, Knoxville, TN, USA
| | - E Philippe
- Axe Médecine Régénératrice, Centre de Recherche du CHU and Département de Chirurgie, Faculté de Médecine, Université Laval, Québec Canada
| | - D How
- Peninsula College of Medicine and Dentistry (PCMD), Plymouth, Devon, UK
| | - Z Zhang
- Axe Médecine Régénératrice, Centre de Recherche du CHU and Département de Chirurgie, Faculté de Médecine, Université Laval, Québec Canada
| | - L Germain
- Axe Médecine Régénératrice, Centre de Recherche du CHU and Département de Chirurgie, Faculté de Médecine, Université Laval, Québec Canada
| | - R Guidoin
- Axe Médecine Régénératrice, Centre de Recherche du CHU and Département de Chirurgie, Faculté de Médecine, Université Laval, Québec Canada.
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Mao J, Wang Y, Philippe E, Cianciulli T, Vesely I, How D, Bourget JM, Germain L, Zhang Z, Guidoin R. Microstructural alterations owing to handling of bovine pericardium to manufacture bioprosthetic heart valves: A potential risk for cusp dehiscence. Morphologie 2017; 101:77-87. [PMID: 28442174 DOI: 10.1016/j.morpho.2017.03.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 02/06/2017] [Accepted: 03/21/2017] [Indexed: 06/07/2023]
Abstract
INTRODUCTION Cross-linking and anti-calcification of prosthetic heart valves have been continuously improved to prevent degeneration and calcification. However, non-calcific structural deteriorations such as cuspal dehiscences along the stent still require further analysis. MATERIAL AND METHOD Based upon the previous analysis of an explanted valve after 7 years, a fresh commercial aortic valve was embedded in poly(methyl methacrylate) (PMMA) and cut into slices to ensure the detailed observation of the assembly and material structures. A pericardial patch embossed to provide the adequate shape of the cusps was investigated after paraffin embedding and appropriate staining. The microstructural damages that occurred during manufacturing process were identified and evaluated by light microscopy, polarized microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). RESULTS The wavy collagen bundles, the key structure of the pericardium patch, were damaged to a great extent at suture sites along the stent and in the compressed areas around the stent post. The fixation of the embossed pericardium patch along the plots of the stent aggravated the microstructural modifications. The damages mainly appeared as the elimination of collagen bundle waviness and delamination between the bundles. CONCLUSION Considering the modes of failure of the explant, the damages to the collagen bundles may identify the vulnerable sites that play an important role in the cusp dehiscence of heart valve implants. Such information is important to the manufacturers. Recommendations to prevent in vivo cusp dehiscence can therefore be formulated.
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Affiliation(s)
- J Mao
- Department of Surgery, Faculty of Medicine, Laval University and Axe médecine régénérative, centre de recherches du CHU, Ferdinand-Vandry Building, Room 4873, 2325, rue de l'Université, Québec G1V 0A6, QC, Canada
| | - Y Wang
- Department of Surgery, Faculty of Medicine, Laval University and Axe médecine régénérative, centre de recherches du CHU, Ferdinand-Vandry Building, Room 4873, 2325, rue de l'Université, Québec G1V 0A6, QC, Canada
| | - E Philippe
- Department of Surgery, Faculty of Medicine, Laval University and Axe médecine régénérative, centre de recherches du CHU, Ferdinand-Vandry Building, Room 4873, 2325, rue de l'Université, Québec G1V 0A6, QC, Canada
| | - T Cianciulli
- Department of Cardiology, Hospital of the Government of the City of Buenos Aires "Prof. Cosme Argerich", Pi y Margall 780, C1155AHB Ciudad Autónoma de Buenos Aires, Argentina
| | - I Vesely
- Cardiology, School of Medicine, University of Colorado Denver, Denver (CO) 80045, USA
| | - D How
- Peninsula School of Medicine and Dentistry, Plymouth University, PL4 8AA, Plymouth, UK
| | - J-M Bourget
- Department of Surgery, Faculty of Medicine, Laval University and Axe médecine régénérative, centre de recherches du CHU, Ferdinand-Vandry Building, Room 4873, 2325, rue de l'Université, Québec G1V 0A6, QC, Canada
| | - L Germain
- Department of Surgery, Faculty of Medicine, Laval University and Axe médecine régénérative, centre de recherches du CHU, Ferdinand-Vandry Building, Room 4873, 2325, rue de l'Université, Québec G1V 0A6, QC, Canada
| | - Z Zhang
- Department of Surgery, Faculty of Medicine, Laval University and Axe médecine régénérative, centre de recherches du CHU, Ferdinand-Vandry Building, Room 4873, 2325, rue de l'Université, Québec G1V 0A6, QC, Canada
| | - R Guidoin
- Department of Surgery, Faculty of Medicine, Laval University and Axe médecine régénérative, centre de recherches du CHU, Ferdinand-Vandry Building, Room 4873, 2325, rue de l'Université, Québec G1V 0A6, QC, Canada.
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Guidoin R, Zegdi R, Lin J, Mao J, Rochette-Drouin O, How D, Guan X, Bruneval P, Wang L, Germain L, Zhang Z. Transcatheter heart valve crimping and the protecting effects of a polyester cuff. Morphologie 2016; 100:234-244. [PMID: 27461102 DOI: 10.1016/j.morpho.2016.06.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 06/16/2016] [Accepted: 06/21/2016] [Indexed: 06/06/2023]
Abstract
INTRODUCTION Prior to deployment, the percutaneous heart valves must be crimped and loaded into sheaths of diameters that can be as low as 6mm for a 23mm diameter valve. However, as the valve leaflets are fragile, any damage caused during this crimping process may contribute to reducing its long-term durability in vivo. MATERIAL AND METHOD Bovine pericardium percutaneous valves were manufactured as follows. The leaflets were sutured on a nitinol frame. A polyester cuff fabric served as a buffer between the pericardium and the stent. Two valves were crimped and one valve was used as control. The valves were examined in gross observation and micro-CT scan and then the leaflets were processed for histology and analyzed in scanning electron microscopy, light microscopy and transmission electron microscopy. RESULT Crimping of the valves resulted in the increase thickness of the leaflets and there was no evidence of additional delamination. The heavy prints of the stents were irregularly distributed on the outflow surface in the crimped devices and were shallow and did not penetrate throughout the thickness of the leaflets. However, the wavy microscopy of collagen fiber bundles was well preserved. They were found to remain individualized without any agglutination as shown by the regular banding appearance. CONCLUSION Crimping of self-deployable valves per se caused only minor damages to the leaflets. However, the procedure could be refined in order to minimize areas of high pressure and swelling of the tissue that can be accompanied with flow surface disruption and increase of the hydraulic conductance. The incorporation of a polyester buffer serves to prevent the deleterious effects that may be caused if the pericardium tissue were in direct contact with the nitinol stent.
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Affiliation(s)
- R Guidoin
- Department of surgery, faculty of medicine, Laval university and axe médecine régénérative, centre de recherche, CHU, Vandry building, 2325, rue de l'Université, GIV OA6 Québec, Canada.
| | - R Zegdi
- Services de chirurgie cardiovasculaire et de pathologie, hôpital européen Georges-Pompidou, 75015 Paris, France
| | - J Lin
- Key laboratory of textile science and technology of Ministry of Education and College of Textile, Donghua university, Shanghai, China
| | - J Mao
- Department of surgery, faculty of medicine, Laval university and axe médecine régénérative, centre de recherche, CHU, Vandry building, 2325, rue de l'Université, GIV OA6 Québec, Canada
| | - O Rochette-Drouin
- Department of surgery, faculty of medicine, Laval university and axe médecine régénérative, centre de recherche, CHU, Vandry building, 2325, rue de l'Université, GIV OA6 Québec, Canada
| | - D How
- Peninsula school of medicine and dentistry, Plymouth, Devon, United Kingdom
| | - X Guan
- Key laboratory of textile science and technology of Ministry of Education and College of Textile, Donghua university, Shanghai, China
| | - P Bruneval
- Services de chirurgie cardiovasculaire et de pathologie, hôpital européen Georges-Pompidou, 75015 Paris, France
| | - L Wang
- Key laboratory of textile science and technology of Ministry of Education and College of Textile, Donghua university, Shanghai, China
| | - L Germain
- Department of surgery, faculty of medicine, Laval university and axe médecine régénérative, centre de recherche, CHU, Vandry building, 2325, rue de l'Université, GIV OA6 Québec, Canada
| | - Z Zhang
- Department of surgery, faculty of medicine, Laval university and axe médecine régénérative, centre de recherche, CHU, Vandry building, 2325, rue de l'Université, GIV OA6 Québec, Canada
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