Document Detail

Novel design of a regional myocardial force transducer.
MedLine Citation:
PMID:  9099437     Owner:  NLM     Status:  MEDLINE    
A novel force transducer was designed to measure the circumferential regional force developed in the ventricular myocardium in vivo. The transducer is composed of a frame, a carrier bar, and a cantilever spring. Two resistance strain gauges embedded on the spring serve as force-sensing elements. The output of a Wheatstone-bridge circuit, containing these two gauges and a temperature compensation resistor, is connected to a preamplifier. The main advantages of this prototype include the initial stretch-adjustment ability (physiologic 0) low temperature drift, high linearity (r = 0.99) with loads ranging from 0 to 100 g, and moderate sensitivity of 0.232 mV/V/g at room temperature. The transducer was validated with in-vivo canine experiments. The experimental results showed that this transducer can be used to reliably measure the myocardial force development during altered cardiac conditions, such as myocardial stunning and myocardial ischemia.
J J Wang; G Drzewiecki; J K Li; J Kedem
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Biomedical instrumentation & technology / Association for the Advancement of Medical Instrumentation     Volume:  31     ISSN:  0899-8205     ISO Abbreviation:  Biomed Instrum Technol     Publication Date:    1997 Mar-Apr
Date Detail:
Created Date:  1997-06-10     Completed Date:  1997-06-10     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8905560     Medline TA:  Biomed Instrum Technol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  155-63     Citation Subset:  IM    
Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 08855-0909, USA.
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MeSH Terms
Equipment Design
Monitoring, Physiologic
Myocardial Contraction / physiology*
Reproducibility of Results
Sensitivity and Specificity
Grant Support

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

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