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Preparation of collagen-based materials for wound dressing
Zhigu Wu1, Zhiyong Sheng, Tongzhu Sun
1Burn Institute, 304th Hospital, Beijing 100037, China. wuzg@cgw.net.cn
Objective:
To describe the methods which were used to develop collagen-based materials for wound dressing.
Methods:
Fresh frozen bovine tendon was treated with 0.05 mol/L acetic acid at pH 3.2 for 48-72 hours, homogenized, filtered, mixed with 8% chondroitin sulphate, for creating a deaerated 1.5%-2.5% collagen solution. The solution was lyophilized in either a pre-frozen or non-pre-frozen mould. The collagen sponge was then cross-linked with 0.25% glutaraldehyde for 24 hours. Three other types of wound dressings were developed using a similar method: collagen membrane with a polyurethane membrane onlay, polyurethane-coated collagen membrane and collagen membrane on gauze.
Results:
It was demonstrated that the use of frozen bovine tendon was stable, and that the prepared collagen sponge contained pores of 50-400 microm in diameter.
Conclusions:
Collagen could be used as wound dressing.