Experimental substantiation of the design of a prosthetic heart valve for «valve-in-valve» implantation
The aim of the study was to perform a series of in vitro tests of a prototype of the developing heart valve prosthesis to evaluate its functional characteristics. Materials and methods. In this work we have used the frames and full prototypes of the prosthesis, consisting of a stent-like stainless s...
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| Format: | Article |
| Language: | Russian |
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Federal Research Center of Transplantology and Artificial Organs named after V.I.Shumakov
2017-06-01
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| Series: | Вестник трансплантологии и искусственных органов |
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| Online Access: | https://journal.transpl.ru/vtio/article/view/754 |
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| author | K. Yu. Klyshnikov E. A. Ovcharenko A. N. Stasev T. V. Glushkova Yu. A. Kudryavtseva L. S. Barbarash |
| author_facet | K. Yu. Klyshnikov E. A. Ovcharenko A. N. Stasev T. V. Glushkova Yu. A. Kudryavtseva L. S. Barbarash |
| author_sort | K. Yu. Klyshnikov |
| collection | DOAJ |
| description | The aim of the study was to perform a series of in vitro tests of a prototype of the developing heart valve prosthesis to evaluate its functional characteristics. Materials and methods. In this work we have used the frames and full prototypes of the prosthesis, consisting of a stent-like stainless steel support frame with mounted biological leaflets and cover. The authors evaluated the calculated and experimental forces necessary for the displacement of the sutureless implanted prosthesis using the test machine under uniaxial tension. The risk of defects and damages to the supporting framework as a result of implantation was evaluated by scanning electron microscopy. The hydrodynamic characteristics of the prosthesis were investigated under physiological conditions and «valvein-valve» implantation. Evaluation of the ergonomics and applicability of the proposed construction on the cadaver heart model of cattle was carried out. Results. As a result of the forces assessment, it was found that the force required to shear the prosthesis was 3.12 ± 0.37 N, while the calculated value was 1.7 N, which is significantly lower than the obtained value. The comparison of the images obtained with small and large magnifications demonstrated the absence of critical surface defects. Additional analysis under the super-large magnifications also did not reveal problem areas. During the hydrodynamic study, it was shown that the average transplant gradient increased slightly from 2.8–3.4 to 3.2–4.5 mm Hg for the initial prosthesis and the «valve-in-valve» complex, respectively. The decrease of the effective orifice area was 6–9% relative to the initial one. Evaluation of the implantation technique demonstrated the consistency of the approach: the use of the developed holder in combination with the balloon implantation system made it possible to position the prosthesis throughout the procedure. Conclusion. The series of tests demonstrates the consistency of the developed design, intended for the replacement of a failed prosthetic valve of the heart with the «valve-in-valve» implantation. |
| format | Article |
| id | doaj-art-25aeabd0fa9d456b8579b376a320dda7 |
| institution | DOAJ |
| issn | 1995-1191 |
| language | Russian |
| publishDate | 2017-06-01 |
| publisher | Federal Research Center of Transplantology and Artificial Organs named after V.I.Shumakov |
| record_format | Article |
| series | Вестник трансплантологии и искусственных органов |
| spelling | doaj-art-25aeabd0fa9d456b8579b376a320dda72025-08-20T03:01:39ZrusFederal Research Center of Transplantology and Artificial Organs named after V.I.ShumakovВестник трансплантологии и искусственных органов1995-11912017-06-01192697710.15825/1995-1191-2017-2-69-77625Experimental substantiation of the design of a prosthetic heart valve for «valve-in-valve» implantationK. Yu. Klyshnikov0E. A. Ovcharenko1A. N. Stasev2T. V. Glushkova3Yu. A. Kudryavtseva4L. S. Barbarash5Research Institute for Complex Issues of Cardiovascular DiseasesResearch Institute for Complex Issues of Cardiovascular DiseasesResearch Institute for Complex Issues of Cardiovascular DiseasesResearch Institute for Complex Issues of Cardiovascular DiseasesResearch Institute for Complex Issues of Cardiovascular DiseasesResearch Institute for Complex Issues of Cardiovascular DiseasesThe aim of the study was to perform a series of in vitro tests of a prototype of the developing heart valve prosthesis to evaluate its functional characteristics. Materials and methods. In this work we have used the frames and full prototypes of the prosthesis, consisting of a stent-like stainless steel support frame with mounted biological leaflets and cover. The authors evaluated the calculated and experimental forces necessary for the displacement of the sutureless implanted prosthesis using the test machine under uniaxial tension. The risk of defects and damages to the supporting framework as a result of implantation was evaluated by scanning electron microscopy. The hydrodynamic characteristics of the prosthesis were investigated under physiological conditions and «valvein-valve» implantation. Evaluation of the ergonomics and applicability of the proposed construction on the cadaver heart model of cattle was carried out. Results. As a result of the forces assessment, it was found that the force required to shear the prosthesis was 3.12 ± 0.37 N, while the calculated value was 1.7 N, which is significantly lower than the obtained value. The comparison of the images obtained with small and large magnifications demonstrated the absence of critical surface defects. Additional analysis under the super-large magnifications also did not reveal problem areas. During the hydrodynamic study, it was shown that the average transplant gradient increased slightly from 2.8–3.4 to 3.2–4.5 mm Hg for the initial prosthesis and the «valve-in-valve» complex, respectively. The decrease of the effective orifice area was 6–9% relative to the initial one. Evaluation of the implantation technique demonstrated the consistency of the approach: the use of the developed holder in combination with the balloon implantation system made it possible to position the prosthesis throughout the procedure. Conclusion. The series of tests demonstrates the consistency of the developed design, intended for the replacement of a failed prosthetic valve of the heart with the «valve-in-valve» implantation.https://journal.transpl.ru/vtio/article/view/754prosthesisheart valvehydrodynamicblood flowimplantation |
| spellingShingle | K. Yu. Klyshnikov E. A. Ovcharenko A. N. Stasev T. V. Glushkova Yu. A. Kudryavtseva L. S. Barbarash Experimental substantiation of the design of a prosthetic heart valve for «valve-in-valve» implantation Вестник трансплантологии и искусственных органов prosthesis heart valve hydrodynamic blood flow implantation |
| title | Experimental substantiation of the design of a prosthetic heart valve for «valve-in-valve» implantation |
| title_full | Experimental substantiation of the design of a prosthetic heart valve for «valve-in-valve» implantation |
| title_fullStr | Experimental substantiation of the design of a prosthetic heart valve for «valve-in-valve» implantation |
| title_full_unstemmed | Experimental substantiation of the design of a prosthetic heart valve for «valve-in-valve» implantation |
| title_short | Experimental substantiation of the design of a prosthetic heart valve for «valve-in-valve» implantation |
| title_sort | experimental substantiation of the design of a prosthetic heart valve for valve in valve implantation |
| topic | prosthesis heart valve hydrodynamic blood flow implantation |
| url | https://journal.transpl.ru/vtio/article/view/754 |
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