Chinese Journal of Tissue Engineering Research ›› 2013, Vol. 17 ›› Issue (34): 6159-6165.doi: 10.3969/j.issn.2095-4344.2013.34.015

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Oxidized sodium alginate used in an extracorporeal circulation pipe

Li Jin-you1, Li Tong2, Yu Mei-li3, Gao Wen-qing2, Hu Xiao-min2, Lu Hai-bin1, Yu Guang-dong1   

  1. 1Postgraduate School of Tianjin Medical University, Tianjin 300170, China; 2the Third Central Hospital of Tianjin, Tianjin 300170, China; 3Key Laboratory of Artificial Cells, Tianjin 300170, China
  • Online:2013-08-20 Published:2013-08-20
  • Contact: Li Tong, Professor, the Third Central Hospital of Tianjin, Tianjin 300170, China litongtj@163.com
  • About author:Li Jin-you, Studying for master’s degree, Postgraduate School of Tianjin Medical University, Tianjin 300170, China xuhuanzenren@163.com
  • Supported by:

    the Scientific and Technological Program of Tianjin, No. 11ZCGYSY02000*; the General Program of Tianjin Municipal Science and Technology Commission, No. 09JCYBJC27600*

Abstract:

BACKGROUND: At present, a heparin-coated extracorporeal circulation pipe is used widely, but the price is expensive and limits its wide application.

OBJECTIVE: To screen the optimal coating condition of oxidated sodium alginate as a coating material to coat the medical polyvinyl chloride pipe and to evaluate the anticoagulant properties and the stability of the coated pipe.

METHODS: Oxidized sodium alginate was prepared with sodium periodate, and the mole ratio of sodium periodate and sodium alginate was 1:8, 1:10 and 1:12, respectively. Oxidized sodium alginate with different degree of oxidation was coated on the surface of medical polyvinyl chloride pipes by chemical methods, then to select the best degree of oxidation. The optimal coating condition was screened through an orthogonal experiment based on concentrations of sulfuric acid, polyethyleneimine and oxidized sodium alginate, and pH value and temperature of oxidized sodium alginate. Additionally, the anticoagulant properties and expulsion rates of the prepared pipes were evaluated in comparison with the blank control group and heparin-coated group. 

RESULTS AND CONCLUSION: The optimal oxidation degree for oxidized sodium alginate was 1:10 for the mole ratio of sodium periodate and sodium alginate. The best coating conditions were 50% concentrated sulfuric acid, 0.05% polyethyleneimine, 40 of reaction temperature, 2 g/L oxidized sodium alginate, and pH value=3.5. The oxidized sodium alginate coating group had a similar trend compared with heparin-coated group in the expulsion rate. The anticoagulant properties of oxidized sodium alginate coating group were little weaker than those of  heparin-coated group (P < 0.05), but significantly better than those of the blank control group. The oxidized sodium alginate-coated extracorporeal circulation pipe has a good anticoagulant property and stability.

Key words: biomaterials, biomaterials and drug controlled release, extracorporeal circulation, sodium alginate, polyvinyl chloride, coating, anticoagulant properties, stability, degree of oxidation, blood compatibility, provincial grants-supported paper

CLC Number: