Document Detail


Blood flow measurement in the canine pancreas.
MedLine Citation:
PMID:  3543497     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Blood flow in the anesthetized animal has been measured indirectly by plethysmography and directly with the stromuhr, venous outflow, and electromagnetic flow techniques. Tissue perfusion in the gland has been assessed qualitatively with thermocouples and quantitatively by isotope fractionation, the distribution of microspheres, hydrogen desaturation, and clearance of either 133Xe or 85Kr. The results of these investigations have been conflicting as there is a large variation in both flow and perfusion measurements, not only overall but also in the values reported by each technique (Table 1). Taking all methods into account flow measurements have been recorded from 9 to 63 (mean 29.8) ml/min, and 10 to 200 (mean 66.1) ml/min/100 g. The mean percentage of the cardiac output distributed to the pancreas is 1.28. Some of these differences are due to various drawbacks associated with each of the techniques; some are almost certainly due to variations in the surgical preparations, and others are undoubtedly caused by the complexity of the pancreatic circulation. Measurements of perfusion in different regions of the pancreas of individual dogs show no difference if all vessels are intact, but accessory vessel ligation affects perfusion in certain areas. In ambulant dogs the studies suggest that pancreatic blood flow is higher than in the anesthetized animal. This is probably true despite inaccuracies associated with each of the techniques. In addition to this drawback there is also the problem of obtaining measurements with the dogs in a relaxed state. It is probably for this reason that the majority of investigators have preferred to examine blood flow and perfusion in the canine pancreas in the anesthetized animal. It is not possible to make a definitive statement regarding the best model and measurement technique available to measure blood flow or tissue perfusion in the canine pancreas. The choice should undoubtedly be governed by the aims of the proposed study. In studies of tissue perfusion in the intact gland, it is obviously preferable that all vessels should be intact, as division of any vessels supplying the gland has been shown to affect perfusion in certain areas. Measurements in such a preparation could be taken using the 85Kr clearance technique, with a flow probe placed around the gastroduodenal artery to ensure stable flow during measurements. It is difficult to assess total arterial blood flow to the whole gland due to the number of vessels supplying the organ.(ABSTRACT TRUNCATED AT 400 WORDS)
Authors:
J G Studley; R T Mathie; L H Blumgart
Related Documents :
23280347 - Doppler study of the fetal vertebral and middle cerebral arteries in fetuses with norma...
542017 - The flow and composition of pulmonary and systemic lymph in dogs with edema.
10416687 - Microcirculation in chronic alcoholic pancreatitis: a laser doppler flow study.
6479687 - Pancreatography in chronic pancreatitis: international definitions.
11137937 - Pharmacokinetics of tissue plasminogen activator in an isolated extracorporeal circuit.
22666867 - Disruption of the peritrophic matrix by exogenous chitinase feeding reduces fecundity i...
Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  The Journal of surgical research     Volume:  42     ISSN:  0022-4804     ISO Abbreviation:  J. Surg. Res.     Publication Date:  1987 Jan 
Date Detail:
Created Date:  1987-03-05     Completed Date:  1987-03-05     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0376340     Medline TA:  J Surg Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  101-15     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Dogs
Electromagnetic Phenomena
Methods
Microspheres
Pancreas / blood supply*
Perfusion
Plethysmography
Regional Blood Flow

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


Previous Document:  Speech quality measurement and the management of stuttering.
Next Document:  Comparison of hepatic protein synthesis in vivo versus in vitro in the tumor-bearing rat.