A New Method for Evaluation of Cavitation Near Mechanical Heart Valves
Evaluation of cavitation in vivo is often based on recordings of high-pass filtered random high-frequency pressure fluctuations. We hypothesized that cavitation signal components are more appropriately assessed by a new method for extraction of random signal components of the pressure signals. We in...
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| Veröffentlicht in: | Journal of biomechanical engineering 2003-10, Vol.125 (5), p.663-670 |
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| container_end_page | 670 |
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| container_issue | 5 |
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| container_title | Journal of biomechanical engineering |
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| creator | Johansen, Peter Manning, Keefe B Tarbell, John M Fontaine, Arnold A Deutsch, Steven Nygaard, Hans |
| description | Evaluation of cavitation in vivo is often based on recordings of high-pass filtered random high-frequency pressure fluctuations. We hypothesized that cavitation signal components are more appropriately assessed by a new method for extraction of random signal components of the pressure signals. We investigated three different valve types and found a high correlation between the two methods r2:0.8806−0.9887. The new method showed that the cavitation signal could be extracted without a priori knowledge needed for setting the high-pass filter cut off frequency, nor did it introduce bandwidth limitation of the cavitation signal. |
| doi_str_mv | 10.1115/1.1613297 |
| format | Article |
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We hypothesized that cavitation signal components are more appropriately assessed by a new method for extraction of random signal components of the pressure signals. We investigated three different valve types and found a high correlation between the two methods r2:0.8806−0.9887. The new method showed that the cavitation signal could be extracted without a priori knowledge needed for setting the high-pass filter cut off frequency, nor did it introduce bandwidth limitation of the cavitation signal.</description><identifier>ISSN: 0148-0731</identifier><identifier>EISSN: 1528-8951</identifier><identifier>DOI: 10.1115/1.1613297</identifier><identifier>PMID: 14618925</identifier><identifier>CODEN: JBENDY</identifier><language>eng</language><publisher>New York, NY: ASME</publisher><subject>Algorithms ; Biological and medical sciences ; Blood Pressure Determination - instrumentation ; Blood Pressure Determination - methods ; Equipment Failure Analysis ; Heart Valve Prosthesis - adverse effects ; Humans ; Medical sciences ; Prosthesis Failure ; Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects) ; Reproducibility of Results ; Sensitivity and Specificity ; Signal Processing, Computer-Assisted ; Technology. Biomaterials. Equipments. Material. 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We hypothesized that cavitation signal components are more appropriately assessed by a new method for extraction of random signal components of the pressure signals. We investigated three different valve types and found a high correlation between the two methods r2:0.8806−0.9887. The new method showed that the cavitation signal could be extracted without a priori knowledge needed for setting the high-pass filter cut off frequency, nor did it introduce bandwidth limitation of the cavitation signal.</description><subject>Algorithms</subject><subject>Biological and medical sciences</subject><subject>Blood Pressure Determination - instrumentation</subject><subject>Blood Pressure Determination - methods</subject><subject>Equipment Failure Analysis</subject><subject>Heart Valve Prosthesis - adverse effects</subject><subject>Humans</subject><subject>Medical sciences</subject><subject>Prosthesis Failure</subject><subject>Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)</subject><subject>Reproducibility of Results</subject><subject>Sensitivity and Specificity</subject><subject>Signal Processing, Computer-Assisted</subject><subject>Technology. Biomaterials. Equipments. Material. 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Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)</topic><topic>Reproducibility of Results</topic><topic>Sensitivity and Specificity</topic><topic>Signal Processing, Computer-Assisted</topic><topic>Technology. Biomaterials. Equipments. Material. Instrumentation</topic><topic>Thromboembolism - etiology</topic><topic>Thromboembolism - prevention & control</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Johansen, Peter</creatorcontrib><creatorcontrib>Manning, Keefe B</creatorcontrib><creatorcontrib>Tarbell, John M</creatorcontrib><creatorcontrib>Fontaine, Arnold A</creatorcontrib><creatorcontrib>Deutsch, Steven</creatorcontrib><creatorcontrib>Nygaard, Hans</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of biomechanical engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Johansen, Peter</au><au>Manning, Keefe B</au><au>Tarbell, John M</au><au>Fontaine, Arnold A</au><au>Deutsch, Steven</au><au>Nygaard, Hans</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A New Method for Evaluation of Cavitation Near Mechanical Heart Valves</atitle><jtitle>Journal of biomechanical engineering</jtitle><stitle>J Biomech Eng</stitle><addtitle>J Biomech Eng</addtitle><date>2003-10-01</date><risdate>2003</risdate><volume>125</volume><issue>5</issue><spage>663</spage><epage>670</epage><pages>663-670</pages><issn>0148-0731</issn><eissn>1528-8951</eissn><coden>JBENDY</coden><abstract>Evaluation of cavitation in vivo is often based on recordings of high-pass filtered random high-frequency pressure fluctuations. We hypothesized that cavitation signal components are more appropriately assessed by a new method for extraction of random signal components of the pressure signals. We investigated three different valve types and found a high correlation between the two methods r2:0.8806−0.9887. The new method showed that the cavitation signal could be extracted without a priori knowledge needed for setting the high-pass filter cut off frequency, nor did it introduce bandwidth limitation of the cavitation signal.</abstract><cop>New York, NY</cop><pub>ASME</pub><pmid>14618925</pmid><doi>10.1115/1.1613297</doi><tpages>8</tpages></addata></record> |
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| ispartof | Journal of biomechanical engineering, 2003-10, Vol.125 (5), p.663-670 |
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| language | eng |
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| source | MEDLINE; ASME_美国机械工程师学会现刊 |
| subjects | Algorithms Biological and medical sciences Blood Pressure Determination - instrumentation Blood Pressure Determination - methods Equipment Failure Analysis Heart Valve Prosthesis - adverse effects Humans Medical sciences Prosthesis Failure Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects) Reproducibility of Results Sensitivity and Specificity Signal Processing, Computer-Assisted Technology. Biomaterials. Equipments. Material. Instrumentation Thromboembolism - etiology Thromboembolism - prevention & control |
| title | A New Method for Evaluation of Cavitation Near Mechanical Heart Valves |
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