The healing dynamics of non-healing wounds using cryo-preserved amniotic membrane.

We evaluated the effect of the application of cryo-preserved amniotic membrane on the healing of 26 non-healing wounds (18 patients) with varying aetiologies and baseline sizes (average of 15.4 cm2 ), which had resisted the standard of care treatment for 6 to 456 weeks (average 88.8 weeks). Based on their average general responses to the application of cryo-preserved AM, we could differentiate three wound groups. The first healed group was characterised by complete healing (100% wound closure, maximum treatment period 38 weeks) and represented 62% of treated wounds. The wound area reduction of at least 50% was reached for all wounds in this group within the first 10 weeks of treatment. Exactly 19% of the studied wounds responded partially to the treatment (partially healed group), reaching less than 25% of closure in the first 10 weeks and 90% at maximum for extended treatment period (up to 78 weeks). The remaining 19% of treated wounds did not show any reaction to the AM application (unhealed defects). The three groups have different profiles of wound area reduction, which can be used as a guideline in predicting the healing prognosis of non-healing wounds treated with a cryo-preserved amniotic membrane.

Preserved amniotic membrane combined with conjunctival autograft transplantation for recurrent symblepharon / 医学研究生学报

Objective:To evaluate the therapeutic effects and value of preserved amniotic membrane combined with conjunctival autograft transplantation for recurrent symblepharon. Methods:A group of 38 eyes in 38 patients with recurrent symblepharon due to recurrent pterygium,chemical burn and other causes were undertaken preserved amniotic membrane combined with conjunctival autograft transplantation.The patients were followed for 6 to 36 monthes.Results:No infections occurred.The amniotic membrane changed into transparent 10 days postoperatively.The conjunctival epithelium emigrated to the surface of amniotic membrane.Impression cytology showed a stable conjunctival epithelium on the surface of amniotic membrane.Efficient movement ability was recovered in 34 eyes(89.5%).Four eyes(10.5%) were still restricted in movement due to partly recurrent symblepharon.Conclusion:The preserved amniotic membrane combined with conjunctival autograft transplantation for is effective recurrent symblepharon

Comparative study on the expressions of HGF and bFGF between fresh and preserved amniotic membranes / 重庆医科大学学报

Objective:To study the expressions of hepatocyte growth factor (HGF) and basic fibroblast growth factor (bFGF) in fresh and two preserved amniotic membranes (AM),and to explore their biological vitality.Methods:The amniotic membranes from the healthy puerperia with abdominal delivery were randomly divided into three groups:fresh group,DMEM/glycerol preserved group at -80℃ and glycerol preserved group at 4℃ (for 1 and 3 months).Immunohistochemical method was used to investigate the changes in the expressions of HGF and bFGF among the three groups.Results:HGF and bFGF were distributed in the epithelium of AMs mostly.The expressions of HGF in both preserved AMs for 1 and 3 months decreased significantly compared with fresh AM (P