Linked Life Data

16696593

Source:http://linkedlifedata.com/resource/pubmed/id/16696593

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2007-4-10
pubmed:abstractText
Photodynamic therapy (PDT) requires oxygen to cause cellular and vascular tumor damage. Tissue oxygen concentration, in turn, is influenced by blood flow and blood oxygenation. Real-time clinical measurement of these hemodynamic quantities, however, is rare. This paper reports the development and application of a probe, combining diffuse reflectance spectroscopy (DRS) for measurement of tumor blood oxygenation and diffuse correlation spectroscopy (DCS) for measurement of tumor blood flow. The instrument was adapted for clinical use during interstitial prostate PDT. Three patients with locally recurrent prostate cancer received 2 mg/ kg motexafin lutetium (MLu) 3 h before illumination and a total light dose of 100 J/cm(2) at 150 mW/cm. Prostrate blood oxygen saturation (StO2) decreased only slightly (approximately 3%) after treatment. On the other hand, prostate blood flow and total hemoglobin concentration over the course of PDT decreased by 50% and 15%, respectively, suggesting MLu-mediated PDT has an anti-vascular effect. While it is certainly impossible to draw definite conclusions from measurements of only three patients, the observed differences in tumor blood flow and blood oxygenation responses during PDT can, in principle, be used to choose among tissue oxygen consumption models and therefore emphasize the potential clinical value for simultaneous monitoring of both parameters.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0031-8655
pubmed:author
pubmed:issnType
Print
pubmed:volume
82
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1279-84
pubmed:dateRevised
2007-12-3
pubmed:meshHeading
pubmed:articleTitle
Real-time in situ monitoring of human prostate photodynamic therapy with diffuse light.
pubmed:affiliation
Department of Physics & Astronomy, University of Pennsylvania, Philadelphia, PA, USA. guoqiang@physics.upenn.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, N.I.H., Extramural