A New Multifunctional Hemostatic Dressing
A hemostatic dressing, a multi-functional technology, applied in bandages, absorbent pads, medical science, etc., can solve the problems of analgesia, anti-infection, promotion of healing, less research and development, and limited hemostasis of hemostatic materials, so as to easily form gel and promote wound healing Healing, antibacterial and antibacterial effects
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[0022] 1. Preparation of chitosan with different degrees of chitosan; after chitin is treated with concentrated lye, the acetamide group in the molecule will be partially hydrolyzed and removed, and when more than half of the acetyl group in the molecule is removed, it will become chitosan. Because the acetamide group replaces the hydroxyl group on the C2 position of the chitin monomer, it is insoluble in dilute acid, dilute alkali and organic solvent, and its properties are similar to cellulose. When more than half of the acetyl groups are removed, it can be dissolved in acid. When chitosan is dissolved in an acidic solution, the free amine group (-NH2) on the monomer molecule is protonated and positively charged (-NH3+) becomes a cationic polymer, which can adsorb some negatively charged substances. In this experiment, further research on the coagulation and bacteriostasis of chitosan with different degrees of deacetylation in chitosan with a larger molecular weight (9.3 × 10...
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[0027] Example 1. Preparation of a novel multifunctional hemostatic dressing. Corresponding chitosan, collagen and chrysophanol were prepared according to the above-mentioned steps (1) (2) (3), and compounded in different proportions according to the step (4). .
[0028] The obtained collagen, chitosan, chrysophanol composite material was cross-linked and freeze-dried, and then covered on the part of the mice with limb injury and bleeding. The hemostatic effect was observed, and it was found that the bleeding stopped after 1 minute. While simply using collagen as a hemostatic material to cover the bleeding site of the same injured mice, the bleeding stopped after 5 minutes. Simply use chitosan as a hemostatic material to cover the bleeding site of the same injured mice, and the bleeding stopped after 4 minutes. The bleeding site of the same injured mice was covered with a composite material of collagen and chitosan, and the bleeding stopped after 2 minutes.
Example Embodiment
[0029] Example 2. Preparation of a novel multifunctional hemostatic dressing. Corresponding chitosan, collagen and chrysophanol were prepared according to the above-mentioned steps (1) (2) (3), and compounded in different proportions according to step (4). .
[0030] After the obtained collagen, chitosan and chrysophanol composite materials were cross-linked and freeze-dried, the same culture conditions were used to culture staphylococcus and anaerobic bacteria. It was observed that the growth of bacteria was significantly inhibited after the composite material of collagen, chitosan and chrysophanol was cultured overnight, while the growth of bacteria on the pure collagen material was vigorous. The number of bacteria grown on the pure chitosan material was lower than that of the collagen group but higher than that of the composite material group of collagen, chitosan and chrysophanol. The number of bacterial growth on the composite material using collagen and chitosan is basi...
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