Document Detail


Novel design of a regional myocardial force transducer.
MedLine Citation:
PMID:  9099437     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
J J Wang; G Drzewiecki; J K Li; J Kedem
Related Documents :
18598977 - Embryogenesis of the heart muscle.
22925077 - Premorbid warfarin use and lower d-dimer levels are associated with spontaneous early i...
22922507 - Impact of resting heart rate on mortality, disability and cognitive decline in patients...
3922027 - Mechanical response of rabbit myocardium and coronary arteries to leukotriene d4. failu...
3497967 - Delayed recovery of severely "stunned" myocardium with the support of a left ventricula...
2916407 - Different coronary vasomotor effects of nifedipine and therapeutic correlates in angina...
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    
Affiliation:
Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 08855-0909, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Calibration
Dogs
Equipment Design
Monitoring, Physiologic
Myocardial Contraction / physiology*
Pressure
Reproducibility of Results
Sensitivity and Specificity
Temperature
Transducers*
Grant Support
ID/Acronym/Agency:
HL49138/HL/NHLBI NIH HHS

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


Previous Document:  Measurement of radiofrequency electromagnetic fields in and around ambulances.
Next Document:  Nitric oxide supplied from a 10% source provides inhaled therapy without lowering inspired oxygen fr...