Abstract:
:We have demonstrated that the fluorescent microsphere technique can be used in small mammals for accurate determination of regional blood flows. In particular we have shown that 100% recovery of trapped microspheres is possible, that tissue digestion can be completed in a shorter time than previously reported, and the error-prone filtration method can be replaced with one of sedimentation. The method gave very good agreement among different fluorescent labels (r2 > 0.99) and low variability among tissues (mean coefficient of variation = 0.06). Simultaneous injection of radiolabelled and fluorescent microspheres established comparability between these methods (r2 = 0.96) for blood flows measured at rest, during vasodilator-induced hypotension, and in muscle hyperaemia during indirect electrical stimulation. Fluorescent microspheres can therefore replace radioactive microspheres for the determination of blood flow with advantages in both safety and cost, without loss of sensitivity.
journal_name
Exp Physioljournal_title
Experimental physiologyauthors
Deveci D,Egginton Ssubject
Has Abstractpub_date
1999-07-01 00:00:00pages
615-30issue
4eissn
0958-0670issn
1469-445Xjournal_volume
84pub_type
杂志文章abstract:NEW FINDINGS:What is the central question of this study? The parasternal intercostal electromyogram (EMGpara) is known to provide an accurate, non-invasive index of respiratory load-capacity balance. Although relationships between EMGpara and both airflow obstruction and hyperinflation have been shown, the independent ...
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