Document Detail

Analysis of thoracic duct flow waves using fast Fourier transform in sheep.
MedLine Citation:
PMID:  10197324     Owner:  NLM     Status:  MEDLINE    
We measured the lymph flow of the thoracic duct using an ultrasound transit-time flowmeter and then analyzed the obtained flow signals by fast Fourier transform. We found that the wave form included a low frequency component (approximately 0.1 Hz) as well as high frequency components which represented cordiac pulsation and respiratory movement. The low frequency component signified an intrinsic thoracic duct pulsation. When venous outflow pressure was increased, the frequency of the thoracic duct pulsation increased, whereas the frequencies of cardiac pulsation and respiratory movement were unchanged. These findings suggest that thoracic duct pulsation is independent of cardiac pulsation and respiratory movement.
S Iizuka; M Onizuka; M Inagaki; S Ishikawa; K Mitsui; T Mitsui
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Lymphology     Volume:  32     ISSN:  0024-7766     ISO Abbreviation:  Lymphology     Publication Date:  1999 Mar 
Date Detail:
Created Date:  1999-06-14     Completed Date:  1999-06-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0155112     Medline TA:  Lymphology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  22-8     Citation Subset:  IM    
Department of Surgery, University of Tsukuba, Japan.
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MeSH Terms
Fourier Analysis
Lymph / physiology*
Signal Processing, Computer-Assisted
Thoracic Duct / physiology*,  ultrasonography*

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