Linked Life Data

10397818

Source:http://linkedlifedata.com/resource/pubmed/id/10397818

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1999-8-3
pubmed:abstractText
The development of a safe and efficient bioreactor design has remained a challenge for the clinical application of immobilized enzymes. Specifically, the use of immobilized heparinase I has been the target of many studies to make heparin anticoagulation therapy safer for the critically ill patient with kidney failure or heart disease. We have investigated the use of Taylor-Couette flow for a novel type of bioreactor. In a previous study, we showed that the fluidization of agarose immobilized heparinase within Taylor vortices in whole blood can lead to extensive blood damage in the form of cell depletion and hemolysis. Based on these findings, we designed and developed a reactor, referred to as vortex-flow plasmapheretic reactor (VFPR), that incorporated plasmapheresis and fluidization of the agarose in the reactive compartment, separate from the whole-blood path. In the present study, immobilized heparinase I was tested as a means of achieving regional heparinization of a closed circuit. This is a method in which heparin is infused into the extracorporeal circuit predialyzer and neutralized postdialyzer. Saline studies were performed with an immobilized heparinase I-packed bed and with the VFPR. An in vitro feasibility study was performed with the VFPR using human blood. The VFPR achieved heparin conversions of 44 +/- 0.5% and 34 +/- 2% in saline and blood, respectively. In addition, the VFPR caused no blood damage. We report a novel method to achieve fluidization which depended on secondary, circumferencial flow, and was independent of the primary flow through the device.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0006-3592
pubmed:author
pubmed:copyrightInfo
Copyright 1999 John Wiley & Sons, Inc.
pubmed:issnType
Print
pubmed:day
5
pubmed:volume
63
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
618-24
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Regional heparinization via simultaneous separation and reaction in a novel Taylor-Couette flow device.
pubmed:affiliation
Department of Chemical Engineering, Massachusetts Institute of Technology, E25-342, 45 Carlton St., Cambridge, Massachusetts 02139, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.