| Observation of cavitation pits on mechanical heart valve surfaces in an artificial heart used in in vitro testing. | |
| | |
MedLine Citation:
|
PMID: 20155293 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Our group has developed an electrohydraulic total artificial heart (EHTAH) with two diaphragm-type blood pumps. Cavitation in a mechanical heart valve (MHV) causes valve surface damage. The objective of this study was to investigate the possibility of estimating the MHV cavitation intensity using the slope of the driving pressure just before valve closure in this artificial heart. Twenty-five and twenty-three-millimeter Medtronic Hall valves were mounted at the inlet and outlet ports, respectively, of both pumps. The EHTAH was connected to the experimental endurance tester developed by our group, and tested under physiological pressure conditions. Cavitation pits could be seen on the inlet valve surface and on the outlet valve surface of the right and left blood pumps. The pits on the inlet valves were more severe than those on the outlet valves in both blood pumps, and the cavitation pits on the inlet valve of the left blood pump were more severe than those on the inlet valve of the right blood pump. The longer the pump running time, the more severe the cavitation pits on the valve surfaces. Cavitation pits were concentrated near the contact area with the valve stop. The major cause of these pits was the squeeze flow between the leaflet and valve stop. |
| | |
Authors:
|
Hwansung Lee; Akihiko Homma; Eisuke Tatsumi; Yoshiyuki Taenaka |
Related Documents
:
|
16607913 - Flow-dependent re-endothelialization of tissue-engineered heart valves. 3511123 - Right atrial flow topography in healthy subjects studied with real-time two-dimensional... 19791973 - A rapid method to estimate westergren sedimentation rates. |
Publication Detail:
|
Type: Journal Article Date: 2010-02-13 |
Journal Detail:
|
Title: Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs Volume: 13 ISSN: 1619-0904 ISO Abbreviation: J Artif Organs Publication Date: 2010 Apr |
Date Detail:
|
Created Date: 2010-04-05 Completed Date: 2010-06-22 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9815648 Medline TA: J Artif Organs Country: Japan |
Other Details:
|
Languages: eng Pagination: 17-23 Citation Subset: IM |
Affiliation:
|
Department of Artificial Organs, Research Institute, National Cardiovascular Center, Suita, Osaka, Japan. hslee@ri.ncvc.go.jp |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Blood Flow Velocity Equipment Design Equipment Failure Analysis* Heart Valve Prosthesis* Heart, Artificial Materials Testing* Prosthesis Design Pulsatile Flow |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Symptomatic linea arcuata hernia.
Next Document: Artificial organs: recent progress in metals and ceramics.