Document Detail

New sensor based on fibre optics for measurement of heart movement.
MedLine Citation:
PMID:  12452419     Owner:  NLM     Status:  MEDLINE    
Innovative fibre-optic sensor technology for measuring the movement of the myocardial walls, and from this the heart chamber volumes, was developed. An optical fibre, with a mirror at its end, is inserted into a catheter located in the heart. An opto-electrical control unit positioned outside the heart contains both the light source and the signal receiver. It generates and couples the light into the fibre and transforms and analyses the reflected signal. With such a system, the movement of the cardiac wall can be continuously measured during each cycle, because the fibre moves synchronously with the heart, and this movement bends the fibre, changing the optical attenuation. Experiments where the fibres were wound around metal cylinders of different diameters revealed a maximum sensitivity of 4% mm(-1), diameter. The noise signal corresponded to about 1% of the diameter. First tests in a working pig heart showed a high correspondence of the fibre signal with cardiac parameters. Although these tests are promising, further long-term, extensive experiments in preclinical test devices, and later in clinical tests, must be carried out before the new sensor is used in clinical practice. The fibre-optic technique could be used in monitoring devices, assist devices, pacemaker systems or cardioverter defibrillators.
K Hoeland; A Kloppe; M Hexamer; G Nowack; J Werner
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medical & biological engineering & computing     Volume:  40     ISSN:  0140-0118     ISO Abbreviation:  Med Biol Eng Comput     Publication Date:  2002 Sep 
Date Detail:
Created Date:  2002-11-27     Completed Date:  2002-12-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7704869     Medline TA:  Med Biol Eng Comput     Country:  England    
Other Details:
Languages:  eng     Pagination:  571-5     Citation Subset:  IM    
Department of Biomedical Engineering, Medical Faculty, Ruhr-University, Bochum, Germany.
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MeSH Terms
Electronics, Medical
Equipment Design
Feasibility Studies
Fiber Optic Technology / instrumentation*
Myocardial Contraction*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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