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find Keyword "环指" 5 results
  • 第五掌骨桡背侧逆行筋膜蒂岛状皮瓣修复环小指皮肤缺损

    目的 总结第5 掌骨桡背侧逆行筋膜蒂岛状皮瓣修复环、小指皮肤缺损的手术方法及疗效。 方法 2004 年9 月- 2009 年10 月,应用第5 掌骨桡背侧逆行筋膜蒂岛状皮瓣修复环、小指皮肤缺损26 例。男18 例,女8 例;年龄18 ~ 56 岁,平均28.5 岁。机器绞伤12 例,电刨伤6 例,电锯伤8 例。损伤指别:环指10 例,小指16 例。损伤部位:掌侧皮肤缺损8 例,指背皮肤缺损18 例。创面范围2.5 cm × 1.5 cm~ 4.5 cm × 3.0 cm。受伤至手术时间1 ~ 9 h,平均4.5 h。术中皮瓣切取范围为3.0 cm × 2.0 cm ~ 5.0 cm × 3.5 cm。供区直接缝合或植皮修复。 结果 术后3 ~ 5 d 4 例皮瓣远端发生静脉回流障碍,发生张力性水疱,经换药处理后表皮脱落愈合;其余皮瓣及供区植皮均顺利成活,切口均Ⅰ期愈合。26 例术后均获随访,随访时间6 ~ 24 个月,平均12 个月。其中10 例因皮瓣臃肿于术后6 ~ 8 个月行皮瓣整形术。末次随访时皮瓣外形均满意,质地与受区相似,两点辨别觉为0.8 ~ 1.2 cm。掌指关节屈曲达80 ~ 90°,平均84°;近侧指间关节屈曲达80 ~ 100°,平均90°。 结论 第5 掌骨桡背侧逆行筋膜岛状皮瓣具有血供可靠、切取方便、质地良好等优点,是修复环、小指皮肤缺损的一种较好方法。

    Release date:2016-08-31 05:41 Export PDF Favorites Scan
  • 环指血管神经肌腱一期移位再植拇指

    Release date:2016-09-01 09:33 Export PDF Favorites Scan
  • RECONSTRUCTION OF DEGLOVED THUMBS WITH FREE SECOND TOE DORSAL FLAP COMBINED WITH MIDDLE OR RING FINGER ISLAND FLAP

    ObjectiveTo investigate the effectiveness of free second toe dorsal flap combined with middle or ring finger island flap for repairing degloved thumbs. MethodsBetween August 2009 and June 2013, 6 patients with degloving injury of the thumb were treated using free second toe dorsal flap combined with middle or ring finger island flap. There were 4 males and 2 females, aged 19-44 years (mean, 32 years). The left thumb was involved in 2 cases and the right thumb in 4 cases, including 5 cases of type II and 1 case of type III degloving injury. The size of wound was 5.5 cm×2.5 cm to 6.5 cm×5.0 cm. After emergency debridemented, 5 patients underwent vacuum sealing drainage and surgical repair after 3-5 days; 1 patient underwent abdominal embedding and repair after 14 days. The size of second toe dorsal flap ranged from 2.5 cm×2.2 cm to 4.2 cm×3.0 cm, and the size of middle or ring finger island flap ranged from 2.0 cm×1.5 cm to 3.5 cm×2.8 cm. Neurorrhaphy was performed between the plantar digital nerve of the second toe and the proper digital nerve at the recipient site in 5 cases, and no nerve anastomose in 1 case. All the distal phalanxes were partially excised. The donor sites were covered with free skin grafts. ResultsAll of the flaps survived completely and incision healed by first intention. Three patients had alloesthesia of the middle or ring finger island flaps. All of the 6 patients were followed up from 6 months to 3 years (mean, 23 months). The flaps had good color and soft texture, and the finger had satisfactory appearance, but the fingernails were smaller than that of normal side. The sensation of the dorsum of the second toe reached S3, and the mean two-point discrimination of the pulp was 6 mm (range, 4-7 mm). According to total active movement (TAM) system, the function of the thumbs was excellent in 5 cases and good in 1 case. ConclusionA combination of free second toe dorsal flap and middle or ring finger island flap is a useful and reliable technique for reconstruction of a degloved thumb.

    Release date:2016-11-14 11:23 Export PDF Favorites Scan
  • Research status and prospect of DNA methylation in liver regeneration

    ObjectiveTo summarize the current research status of the relationship between DNA methylation and liver regeneration.MethodThe related literatures at home and abroad were searched to review the studies on relationships between the methylation level of liver cells, regulation of gene expression, and methylation related proteins and liver regeneration.ResultsThe DNA methylation was an important epigenetic regulation method in vivo and its role in the liver regeneration had been paid more and more attentions in recent years. The existing studies had found the epigenetic phenomena during the liver regeneration such as the genomic hypomethylation, methylation changes of related proliferating genes and DNA methyltransferase and UHRF1 regulation of the liver regeneration.ConclusionsThere are many relationships between DNA methylation and liver regeneration. Regulation of liver regeneration from DNA methylation level is expected to become a reality in the near future.

    Release date:2020-04-28 02:46 Export PDF Favorites Scan
  • Mechanism of ring finger protein 11 regulating Akt signaling pathway to promote osteogenic differentiation of bone marrow mesenchymal stem cells

    Objective To investigate the role and regulatory mechanism of ring finger protein 11 (RNF11) on Akt signaling pathway in the process of osteogenesis of bone marrow mesenchymal stem cells (BMSCs) to provide ideas for further clarifying its osteogenesis mechanism and its use in clinical treatment in the future. Methods BMSCs were isolated and cultured from fresh bone marrow of healthy donors and subcultured. The 4th generation cells were used in experiments after identification by flow cytometry, and osteogenic, chondrogenic, and adipogenic induction. BMSCs were cultured in osteogenic differentiation medium for 0-14 days. The degree of osteogenic differentiation was detected by Alizarin red staining and alkaline phosphatase (ALP) staining, and the protein expression of RNF11 was detected by Western blot. The 4th generation BMSCs were divided into blank control group (group A), empty lentivirus (Lv-NC) group (group B), and knockdown RNF11 (Lv-ShRNF11) group (group C). Osteogenesis was induced and cultured for 0-14 days. The expression of RNF11 protein was detected by Western blot, the degree of osteogenic differentiation was detected by Alizarin red staining and ALP staining, and the relative mRNA expressions of Runx2, osteocalcin (OCN), and osteopontin (OPN) were detected by real-time fluorescence quantitative PCR (qRT-PCR). The protein relative expressions of Akt, Smad1/5/8, and β-catenin signaling pathway were detected by Western blot, expressed as the ratio before and after phosphorylation. In order to study the effect mechanism of RNF11 on Akt signaling pathway, the 4th generation BMSCs were divided into Lv-NC transfection group (group A1), Lv-ShRNF11 transfection group (group B1), and Lv-ShRNF11 transfection supplemented with Akt signaling pathway activator SC79 group (group C1). The protein relative expressions of RNF11 and Akt signaling pathway were detected by Western blot, the related osteogenesis indexes were detected by Alizarin red staining, ALP staining, and qRT-PCR. ResultsThe flow cytometry, and osteogenic, chondrogenic, adipogenic induction culture identification showed that the isolated and cultured cells were BMSCs. The protein relative expression of RNF11 increased gradually with the extension of osteogenic differentiation time (P<0.05); after knockdown RNF11, Alizarin red and ALP stainings showed that the degree of osteogenic differentiation of BMSCs in group C were significantly lower than those in groups A and B, and qRT-PCR detection showed that the relative expression of Runx2, OCN, and OPN mRNA significantly decreased (P<0.05). The protein relative expressions of RNF11 and Akt signaling pathway significantly increased with the extensions of osteogenic differentiation time (P<0.05). After knockdown RNF11, the protein relative expression of Akt signaling pathway in group C was significantly lower than that in groups A and B (P<0.05), while Smad1/5/8 and β-catenin signaling pathway had no significant effect (P>0.05). Compared with group A1, the protein relative expression of RNF11 in groups B1 and C1 significantly decreased (P<0.05). Compared with groups A1 and C1, the protein relative expression of Akt signaling pathway in group B1 was significantly lower (P<0.05); Alizarin red and ALP stainings showed that the degree of osteogenic differentiation of BMSCs in group C1 were slightly lower than that of group A1 (P>0.05), but significantly higher than that of group B1 (P<0.05); qRT-PCR detection showed that the relative expressions of Runx2, OCN, and OPN mRNA in group C1 were slightly lower than those of group A1 (P>0.05), but were significantly higher than those of group B1 (P<0.05). ConclusionRNF11 promotes the differentiation of BMSCs into osteoblasts by positively regulating the activation level of Akt signaling pathway. RNF11 can be used as a potential target to improve the bone repair efficacy of BMSCs and treat bone metabolic diseases.

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