Implantation Forces and Anatomical Fit of Medtentia Annuloplasty Ring in Porcine Hearts
Marno, Heikki (2013)
Marno, Heikki
Metropolia Ammattikorkeakoulu
2013
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201305127842
https://urn.fi/URN:NBN:fi:amk-201305127842
Tiivistelmä
Medtentia annuloplasty ring (MAR) is an implant for mitral valve repair using a helix ring concept developed by Medtentia International ltd. This helix ring implant takes on mitral annuloplasty with a new perspective as it utilizes the anatomy of the valve and is easier to implant compared to regular annuloplasty rings. As the implantation procedure takes less time and can be performed with minimal invasive surgery, it brings a potential treatment form for patients for whom surgery is considered too risky today.
This bachelor’s thesis was a part of Medtentia’s research and development project to gain knowledge about the forces linked with the implantation of MAR. The initial problem had to with knowing when an expanded MAR should be implanted instead of the regular MAR. The measurement data was gathered by implanting various MARs and testers into porcine hearts while being attached to a digital force meter. The hearts used in the measurements were from pigs weighing from 180 to 250 kg. The measurements were performed at the Hospital district of Helsinki and Uusimaa in Meilahti research and development unit during the time period of 11/2012 and 1/2013. There were a total of 41 recorded measurements done on 6 porcine hearts.
The findings in this research are used in the ongoing development of MAR, its accessories and their implantation procedures. These include giving recommendations on the limit of the implanted mitral valves width when switching to an expanded option of MAR. Implantation procedure trouble spots and possible new solutions were added to the summary as well. The most concrete improvement was the calibration of the helix tester to simulate regular MAR better. An implantation slide that reduced implantation friction led to patenting.
This bachelor’s thesis was a part of Medtentia’s research and development project to gain knowledge about the forces linked with the implantation of MAR. The initial problem had to with knowing when an expanded MAR should be implanted instead of the regular MAR. The measurement data was gathered by implanting various MARs and testers into porcine hearts while being attached to a digital force meter. The hearts used in the measurements were from pigs weighing from 180 to 250 kg. The measurements were performed at the Hospital district of Helsinki and Uusimaa in Meilahti research and development unit during the time period of 11/2012 and 1/2013. There were a total of 41 recorded measurements done on 6 porcine hearts.
The findings in this research are used in the ongoing development of MAR, its accessories and their implantation procedures. These include giving recommendations on the limit of the implanted mitral valves width when switching to an expanded option of MAR. Implantation procedure trouble spots and possible new solutions were added to the summary as well. The most concrete improvement was the calibration of the helix tester to simulate regular MAR better. An implantation slide that reduced implantation friction led to patenting.