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find Author "ZHANG Yuxi" 1 results
  • PREPARATION AND HEMOSTATIC EVALUATION OF CHITOSAN COMPOSITE HEMOSTATIC MEMBRANE.

    Objective To improve the flexibil ity and hemostatic properties of chitosan (CS)/carboxymethyl chitosan (CMCS) hemostatic membrane by using glycerol and etamsylate to modify CS/CMCS hemostatic membrane. To investigate themechanical properties and hemostatic capabil ity of modified CS/CMCS hemostatic membrane. Methods The 2% CS solution, 2% CMCS solution, 10%, 15%, 20%, 25%, 30% glycerol with or without 0.5% etamsylate were used to prepare CS/CMCS hemostatic membrane with or without etamsylate by solution casting according to ratio of 16 ∶ 4 ∶ 5. The tensile properties were evaluated by tensile test according to GB 13022-1991. Twenty venous incisions and five arterial incisions hemorrhage of 1 cm × 1 cm in rabbit ears were treated by CS/CMCS hemostatic membrane modified by 15% (group A) and 25% (group B) of glycerol, and a combination of them and 0.5% etamsylate (groups C and D). The bleeding time and blood loss were recorded. Results The pH of yellow CS/ CMCS hemostatic membrane with thickness of 30-50 μm was 3-4. The incorporation glycerol into CS/CMCS hemostatic membrane resulted in decreasing in tensile strength (7.6%-60.2%) and modulus (97%-99%). However, elongation at break and water content increased 5.7-11.6 times and 13%-125% markedly. CS/CMCS hemostatic membrane adhered to wound rapidly, absorbed water from blood and became curly. The bleeding time and blood loss of venous incisions were (70 ± 3) seconds and (117.2 ± 10.8) mg, (120 ± 10) seconds and (121.2 ± 8.3) mg, (52 ± 4) seconds and (98.8 ± 5.5) mg, and (63 ± 3) seconds and (90.3 ± 7.1) mg in groups A, B, C, and D, respectively; showing significant differences (P lt; 0.05) between groups A, B and groups C, D. The bleeding time and blood loss of arterial incision were (123 ± 10) seconds and (453.3 ± 30.0) mg in group C. Conclusion CS/CMCS hemostatic membrane modified by glycerol and etamsylate can improve the flexibil ity, and shorten the bleeding time.

    Release date:2016-08-31 05:47 Export PDF Favorites Scan
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