Document Detail

Blends of stearyl poly(ethylene oxide) coupling-polymer in chitosan as coating materials for polyurethane intravascular catheters.
MedLine Citation:
PMID:  11410895     Owner:  NLM     Status:  MEDLINE    
To optimize the surface biocompatibility of the intravascular catheter, an amphiphilic coupling-polymer of stearyl poly (ethylene oxide) -co- 4,4'-methylene diphenyl diisocyanate-co- stearyl poly (ethylene oxide), for short MSPEO, was specially designed as the surface modifying additive (SMA). The blend of MSPEO in chitosan was coated on the outer wall of the catheters by the dip-coating method. The surface analysis was carried out by ATR-FTIR and contact angle measurements. The surface enrichment of MSPEO was confirmed. On the water interface, the larger the molecular weight of PEO was, the higher the surface enrichment. While on air interface, the case was the contrary. Three kinds of static test of clotting time, plasma recalcification time (PRT), prothrombin time (PT), and thrombin time (TT), as well as the static platelet adhesion experiment were carried out. The results indicated that the coated surface could resist the clotting effectively. In order to test the blood-compatibility of the coated catheters under a shear of blood flow, the dynamic experiment was performed through a closed-loop tubular system with the shear rate of 1500 s(-1). The results of blood regular testing at six different times (0, 5,10, 20, 30, and 60 min) indicated that the biocompatibility of the coating was nearly ideal. Finally, the SMA-MSPEO was proved to be non-chronic-toxic by animal experiments with rats and suitable as a coating material for clinical use.
D A Wang; J Ji; Y H Sun; G H Yu; L X Feng
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of biomedical materials research     Volume:  58     ISSN:  0021-9304     ISO Abbreviation:  J. Biomed. Mater. Res.     Publication Date:  2001  
Date Detail:
Created Date:  2001-06-18     Completed Date:  2001-12-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0112726     Medline TA:  J Biomed Mater Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  372-83     Citation Subset:  IM    
Copyright Information:
Copyright 2001 John Wiley & Sons, Inc.
Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
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MeSH Terms
Biocompatible Materials*
Chitin / analogs & derivatives
Polyethylene Glycols
Reg. No./Substance:
0/Biocompatible Materials; 0/Polyethylene Glycols; 0/Polyurethanes; 0/Stearates; 0/stearyl poly(ethylene oxide); 1398-61-4/Chitin; 9012-76-4/Chitosan

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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