Document Detail

New method for evaluation of lung lymph flow rate with intact lymphatics in anaesthetized sheep.
MedLine Citation:
PMID:  16948801     Owner:  NLM     Status:  MEDLINE    
AIM: Lung lymph has commonly been studied using a lymph fistula created by tube cannulation into the efferent duct of the caudal mediastinal node in sheep. In this method, the tail region of the caudal mediastinal node is resected and the diaphragm is cauterized to exclude systemic lymph contamination, and cannulation is performed into one of the multiple efferent ducts originating from the caudal mediastinal node. Moreover, the pumping activity of lymphatics might be diminished by cannulation. Therefore, the purpose of the study was to evaluate the flow rate of lung lymph with maintenance of intact lymphatic networks around the caudal mediastinal node to the thoracic duct in sheep. METHODS: An ultrasound transit-time flow meter was used to measure lung lymph flow. The thoracic duct was clamped just above the diaphragm and the flow probe was attached to the thoracic duct just after the last junction with an efferent duct from the caudal mediastinal node. The lung lymph flow rate was measured at baseline and under conditions of lung-oedema formation. RESULTS: The baseline lung lymph flow rate in our model was three- to sixfold greater than values obtained with the cannulation method. With oedema-formation, the lung lymph flow rate was the same as that measured using cannulation. CONCLUSION: The lung lymph flow was unexpectedly large under the conditions of the study, and our data suggest that the drainage effect of lymphatics is significant as a safety factor against pulmonary oedema formation.
T Naito; Y Ozawa; M Tomoyasu; M Inagaki; M Fukue; M Sakai; T Yamamoto; S Ishikawa; M Onizuka
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Acta physiologica (Oxford, England)     Volume:  188     ISSN:  1748-1708     ISO Abbreviation:  Acta Physiol (Oxf)     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-09-04     Completed Date:  2007-06-29     Revised Date:  2009-02-03    
Medline Journal Info:
Nlm Unique ID:  101262545     Medline TA:  Acta Physiol (Oxf)     Country:  England    
Other Details:
Languages:  eng     Pagination:  139-49     Citation Subset:  IM    
Department of Respiratory Surgery, University of Tsukuba, Tsukuba, Ibaraki, Japan.
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MeSH Terms
Blood Pressure
Catheterization / methods
Diaphragm / surgery
Lung / physiology*,  ultrasonography
Lymph / physiology*,  ultrasonography
Pulmonary Edema / etiology,  pathology,  physiopathology
Reproducibility of Results
Rheology / methods
Sheep, Domestic
Thoracotomy / methods
Comment In:
Acta Physiol (Oxf). 2007 Jan;189(1):99-100; author reply 100   [PMID:  17280561 ]

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

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