Linked Life Data

8530548

Source:http://linkedlifedata.com/resource/pubmed/id/8530548

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1996-1-26
pubmed:abstractText
Laser-Doppler flowmetry (LDF) is very popular for measurements of dynamic changes of cerebral blood flow (CBF). We studied whether changes of CBF measured by LDF correlate with CBF measured by the [14C]iodoantipyrine (IAP) technique in the range relevant for most physiological experiments (-30-(+)130%). LDF was recorded biparietally by two laser-Doppler probes in halothane-anesthetized rats. Absolute CBF was measured in tissue samples of both parietal cortices after [14C]iodoantipyrine was given i.v. CBF of one hemisphere was reduced by an episode of cortical spreading depression (CSD), which markedly reduces the responsiveness of the ipsilateral cortical CBF to vasoactive stimuli for up to 30 min, while CBF regulation of the contralateral cortex remains intact. CBF was measured under normoventilated, hypercapnic, and hypoxic conditions. The relative changes of CBF measured by the LDF technique were independent of the preceding baseline LDF value. Absolute CBFIAP values correlated poorly to the simultaneously recorded arbitrary LDF values (r = 0.44). In contrast, the ratio of CBFIAP values correlated with the ratio of the relative LDF changes between the two hemispheres (p < 0.001). At reduced CBF, no significant difference was found between methods. At increased CBF, however, LDF was greater than CBFIAP, as indicated by a slope of correlation of 1.45 (p < 0.005).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0271-678X
pubmed:author
pubmed:issnType
Print
pubmed:volume
16
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
156-61
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Laser-Doppler evaluation of rat brain microcirculation: comparison with the [14C]-iodoantipyrine method suggests discordance during cerebral blood flow increases.
pubmed:affiliation
Laboratory of Clinical Neurophysiology, Rigshospitalet, Copenhagen, Denmark.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't