Linked Life Data

16883128

Source:http://linkedlifedata.com/resource/pubmed/id/16883128

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SubjectPredicateObjectContext
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pubmed-article:16883128pubmed:dateCreated2006-8-2lld:pubmed
pubmed-article:16883128pubmed:abstractTextThe severely debilitating nature of chronic lung disease has long provided the impetus for the development of technologies to supplement the respiratory capacity of the human lung. Although conventional artificial lung technologies function by delivering pressurized oxygen to the blood through a system of hollow fibers or tubes, our approach uses photolytic energy to generate dissolved oxygen (DO) from the water already present in blood, thus eliminating the need for gas delivery. We have previously demonstrated that it is feasible to generate dissolved oxygen from water based on UVA illumination of a highly absorbent TiO2 thin film. In the current study, we extend this work by using photolytic energy to generate DO from whole blood, thus resulting in an increase of oxyhemoglobin as a function of back side TiO2 surface film illumination. Initial experiments, performed with Locke's Ringer solution, demonstrated effective film thickness and material selection for the conductive layer. The application of a small bias voltage was used to conduct photogenerated electrons from the aqueous phase to minimize electron recombination with the DO.Mixed arterial-venous bovine blood was flowed in a recirculating loop over TiO2 nanocrystalline films illuminated on the side opposite the blood (or "back side") to eliminate the possibility of any direct exposure of blood to light. After light exposure of the TiO2 film, the fraction of oxyhemoglobin in the blood rapidly increased to near saturation and remained stable throughout the trial period. Last, we evaluated potential biofouling of the DO generating surface by scanning electron microscopy, after photolytically energized DO generation in whole blood, and observed no white or red blood cell surface deposition, nor the accumulation of any other material at this magnification. We conclude that it is feasible to photolytically oxygenate the hemoglobin contained in whole blood with oxygen derived from the blood's own water content without involving a gaseous phase.lld:pubmed
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pubmed-article:16883128pubmed:authorpubmed-author:GilbertRichar...lld:pubmed
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pubmed-article:16883128pubmed:volume52lld:pubmed
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pubmed-article:16883128pubmed:pagination456-66lld:pubmed
pubmed-article:16883128pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:16883128pubmed:articleTitlePhotolytically driven generation of dissolved oxygen and increased oxyhemoglobin in whole blood.lld:pubmed
pubmed-article:16883128pubmed:affiliationBattelle Memorial Institute, Columbus, Ohio, USA.lld:pubmed
pubmed-article:16883128pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:16883128pubmed:publicationTypeComparative Studylld:pubmed