Linked Life Data

7783254

Source:http://linkedlifedata.com/resource/pubmed/id/7783254

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1995-7-20
pubmed:abstractText
Nuclear magnetic resonance (NMR) imaging shows promise in the measurement of human cerebral blood flow (CBF) in that nonradioactive indicators may be used. Our earlier investigations with trifluoromethane (FC-23) gas have shown that this compound can be used to safely and effectively measure CBF in anesthetized animal models. In this Phase I dose-escalation study we set out to determine the maximal tolerated concentration (MTC) of FC-23 in normal healthy male volunteers and to assess its feasibility as an NMR indicator. Five subjects were exposed in a blinded fashion to escalating concentrations of FC-23 between 10% and 60%, randomly interleaved with exposures to both room air and 40% nitrous oxide. On each study day, the subjects breathed the test gas for eight pulses of 3 min each with 2-min clearance periods between the pulses. The subjects underwent intensive physiologic and neurobehavioral monitoring throughout the study period. The first subject experienced an anesthetic response to 60% FC-23, and the second subject experienced "discomfort" and requested discontinuation at the initiation of 40% FC-23. The MTC was subsequently determined to be 30% FC-23 (all subjects tolerated the gas), although a small (37.6 vs. 40.5) but statistically significant retention of carbon dioxide was found (p = .003). When one subject received 30% FC-23 during an NMR imaging study, a pronounced anesthetic effect with intolerable hyperacusis was demonstrated. Human studies of FC-23 have been discontinued in our laboratory.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0098-4108
pubmed:author
pubmed:issnType
Print
pubmed:volume
45
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
221-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Neurobehavioral and physiologic effects of trifluoromethane in humans.
pubmed:affiliation
College of Pharmacy and Allied Health Professions, Wayne State University, Detroit, MI 48202, USA.
pubmed:publicationType
Journal Article, Clinical Trial, Research Support, U.S. Gov't, P.H.S., Randomized Controlled Trial, Research Support, Non-U.S. Gov't