Effects of hyperbaric oxygen therapy on 32 cases of full-thickness skin grafting for the repair of defects on the hand and foot

Full-thickness skin grafting is one of the most commonly used repair methods for skin defects. It has the advantage of wear-resistant with less scar hyperplasia and less difficult to operate with no symptoms. Hyperbaric oxygen was used in this study after full-thickness skin grafting from September 2012 to August 2016 to achieve the best effect of skin survival after surgery.

Oxygen Penetration Through Full-Thickness Skin by Oxygen-Releasing Sutures for Skin Graft Transplantation

The transplantation of full-thickness skin grafts(FTSGs)is important for reconstructing skin barrier and promoting wound healing.Sufficient oxygen supply is closely related to the success of skin grafting.However,full-thickness oxygen delivery is limited by the poor oxygen permeability of skin.Oxygen-releasing sutures(O_(2)sutures)were developed to facilitate oxygen penetration through full-thickness skin.The O_(2)sutures delivered 100 times more oxygen than topical gaseous oxygen therapy at a 15 mm depth in the skin model.Under extreme hypoxia(<0.5%O_(2),v/v),O_(2)sutures could also promote endothelial cell proliferation.After the transplantation of FTSGs in mice,O_(2)sutures accelerated blood re-perfusion and increased the survival area of the skin graft.It is expected that O_(2)sutures will be adopted in clinical applications to increase the success rate of full-thickness skin transplantation.

Correction of Scar Contracture Deformity of Dorsal Hand by Invisible Full-thickness Mesh Skin Graft

Objective To investigate the effect of invisible full-thickness mesh skin graft in the treatment of scar contracture deformity of the dorsal hand.Methods From January 2016 to February 2019,25 patients with cicatricial contracture deformity of dorsal hand admitted to our hospital underwent full thickness skin graft.During the operation,the scar healed completely and the superficial fascia remained intact.The wound surface was transplanted with invisible mesh full thickness skin graft.The survival of the skin graft and the recovery of hand function and appearance in the later period were observed after the operation.Results The skin grafts of 20 patients survived with high quality,3 cases had partial epidermis exfoliation,and 2 cases had partial epidermis scattered in blisters.After intensive dressing change,all wounds healed and no complications occurred after the operation.The hand function and appearance of the patients were obviously improved.Conclusion The application of full thickness skin graft to correct scar deformity has the advantages of good functional and appearance recovery and difficult postoperative contracture.Invisible full-thickness mesh skin graft is one of the ideal methods to correct scar contracture deformity of the dorsal hand.

One-stitch anastomosis through the skin with bicanalicular intubation:a modified approach for repair of bicanalicular laceration

AIM:To evaluate the efficacy and safety of one-stitch anastomosis through the skin with bicanalicular silicone tube intubation in repairing of bicanalicular laceration.METHODS:The clinical data of 15 consecutive patients with both superior and inferior canalicular laceration in one eye who underwent surgical repair using one-stitch anastomosis through the skin and bicanalicular stent were retrospective studied.All the operations were performed under surgical microscope,5-0 silk sutures were used and were with bicanalicular silicone tube(diameter was 8mm) intubation,for one lacerated canaliculi one-stitch anastomosis through the skin.The stents were left in place for 3 months postoperatively and then removed.The follow-up period was 3-36 months(average 14 months). RESULTS:In 15 patients,13 patients were cured entirely,1 patient was meliorated,1 patient with no effects.All patients had got good recovery of eyelid laceration with no traumatic deformity in eyelid and canthus.Complication was seen in one case,for not followed the doctor’s guidance to come back to hospital to had the suture removed on the 7thday after operation,when he came at the 15thday,the inferior canalicular wall and eyelid skin were corroded by the suture caused 2mm wound,and the inside silicone tube was exposed,a promptly repair with 10-0 nylon suture was done,the wound healed in a week.There were no early tube protrusions and punctal slits in the patients.CONCLUSION:One-stitch anastomosis through the skin with bicanalicular silicone tube intubation is a good method in repair of bicanalicular laceration in one eye,the cut ends can be anastomosed directly,and with excellent cosmetic results,it is acceptable for the patients.For there is no suture remained in the wound permanently,so there is no suture-related granuloma which may cause obstruction or stenosis of canaliculi.It is simple,economical,effective and safe.

Repair of necrosis and defects of penile skin with autologous free skin flap

We described a 27-year-old case of avulsion and traumatic degloving of penile with extensive penis skin necrosis. Under general anesthesia, donor skin was partially resected from lower limbs according to defect area of penile skin. Then shear the shape of graft was sheared, sutured to hostage skin defect and enswathed with tension. The postoperative appearance and function of the penis were satisfactory. It is suggest the homologous free skin flap from lower limbs is suitable for penile skin repair and beneficial to patient resulting in satisfactory erection and shape.

Skin-Adhesive Tape versus Interrupted Suture in Episiotomy Skin Repair: Randomized Control Trial

Introduction: The ideal method for perineal repair should be quick, easy to perform and preferably, with minimal pain. Aim: To compare skin adhesive tape and interrupted?absorbable subcuticular suture for episiotomy repair after birth as regard postoperative pain, skin closure time and wound infection. Design: Prospective double-blinded randomized controlled trial. Methods: Three-hundred qualified patients were equally distributed between two groups. Group 1 underwent skin repair with skin adhesive tape, while group 2 underwent the currently traditional method for perineal repair by interrupted suture. Pain was evaluated at 2, 4, 6 and 12 hours after birth then daily until one week using Wong-Baker faces pain rating scale with verbal expression for pain intensity as primary outcome. Skin closure time and wound infection were also evaluated as secondary outcomes. Results: Statistically significant difference in pain was?found at 4 and 6 hours, and 3,?4,?5 and 7 days after perineal repair in favor of the adhesive tape group (p = 0.04 and 0.02 respectively) (p = 0.002, 0.002, 0.003 and 0.001 respectively). No statistically significant difference was found in skin closure time between both groups, and no cases of wound infection occurred in both groups (p = 0.3). Conclusion: Skin adhesive tape may be superior to skin suturing in decreasing pain resulting from perineal repair after birth;however, further studies are needed to assess long-term effects, calculate costs and accurately measure patients’ satisfaction, which were not addressed in this study.

Study on the Repairing Effect of Cosmetics Containing <i>Artemisia annua</i>on Sensitive Skin

In view of the increasing sensitivity of consumer skin in recent years, cosmetics containing Artemisia annua extract was tested to evaluate its effectiveness in repairing sensitive skin. Through the experiment of xylene-induced ear swelling in mice, it was found that the inhibition rates of ear swelling in mice induced by xylene in three groups of cosmetics containing Artemisia annua extract reached 60.40%, 73.36% and 74.01%, respectively, close to the positive drug group. Twenty-five sensitive skin volunteers were selected for human clinical trial, and the skin TEWL value, cuticle hydration degree and skin heme (ultra-high concentration) were tested. The results showed that using cosmetics containing Artemisia annua extract for four weeks could effectively increase the hydration degree of cheek cuticle by 63.90% and reduce transepidermal waterloss (TEWL) by 21.51%. The skin heme (ultra-high concentration) decreased by 69.14% and the affected area decreased by 77.47%. The results show that the cosmetics containing Artemisia annua extract can inhibit inflammation, repair skin barrier, improve damaged skin, and reduce redness and other sensitive skin symptoms.

Use of Acellular Fish Skin for Dura Repair in an Ovine Model: A Pilot Study

Recently the use of biologic materials as dura mater repair patches has been increasing. The purpose of this study is to assess the basis for efficacy and safety of using a novel fish derived acellular dermis (Kerecis Omega3 DuraTM). In an ovine model a craniotomy under general anaesthesia was performed. A defect was produced in the dural covering of approximately 1 × 2 cm and closed with an onlay technique, with Kerecis Omega3 Dura. The bone defect was covered with the bony flap and the overlying tissues closed in layers. At 2, 5, 8 and 11 weeks the sheep underwent MRI scanning followed by euthanasia, necropsy and histological assessment. MRI images taken at 2, 5, 8 and 11 weeks showed initially moderate inflammatory response, which diminished over time, and at 11 weeks no evidence of inflammation existed. There was evidence of cerebrospinal fluid leakage at no time point. Necropsy revealed some adhesions at 5 and 8 weeks, in particular at 5 weeks, but at 11 weeks there were no adhesions found. From 2 - 11 weeks, there was evidence of initially an inflammatory reaction followed by neodura formation at the defect site through cellular ingrowth and remodeling of the acellular fish skin. Histology showed a histiocytic foreign body reaction initially that subsided over time. As early as 8 weeks there was evidence of neodura formation and by 11 weeks there was a minimal inflammatory response with an intact neodura formed. In this pilot study the Kerecis Omega3 Dura patches performed in a safe and efficacious manner. This new material needs to be fully assessed and compared with other products that are currently on the market in a larger scale animal study.

Regulatory T cells in skin regeneration and wound healing

As the body’s integumentary system,the skin is vulnerable to injuries.The subsequent wound healing processes aim to restore dermal and epidermal integrity and functionality.To this end,multiple tissue-resident cells and recruited immune cells cooperate to efficiently repair the injured tissue.Such temporally-and spatially-coordinated interplay necessitates tight regulation to prevent collateral damage such as overshooting immune responses and excessive inflammation.In this context,regulatory T cells(Tregs)hold a key role in balancing immune homeostasis and mediating cutaneous wound healing.A comprehensive understanding of Tregs’multifaceted field of activity may help decipher wound pathologies and,ultimately,establish new treatment modalities.Herein,we review the role of Tregs in orchestrating the regeneration of skin adnexa and catalyzing healthy wound repair.Further,we discuss how Tregs operate during fibrosis,keloidosis,and scarring.

Clinical Application of Direct Skin Grafting Repair in Popliteal Scar Contracture after Burn in Children

Objective To observe the clinical application of direct skin grafting in repairing popliteal scar contracture after burn in children.Methods From April 2017 to January 2019,30 children with popliteal scar contracture after burn were selected as the research objects.The scar status,knee joint function and quality of life of the patients before and after the operation were compared by direct skin grafting after medium thickness skin removal.Results 30 patients were treated with skin grafting to repair popliteal scar contracture,27 patients healed well,and the survival rate of skin grafting reached 90.00%.The scores of postoperative scar and knee joint function scale(WOMAC)were lower than those before the operation,and the scores of concise health status scale(SF-36)were higher than those before the operation,with statistical significance(P<0.05).Conclusion Scar contracture of popliteal fossa after burn in children can be repaired by direct skin grafting in the skin extraction area after medium thickness skin cutting,which can effectively improve scar condition,restore knee joint function and significantly improve quality of life.

Repair of facial skin defect with a skin flap of SMAS pedicle

To report a method of repair facial skin defects with a skin flap of SMAS pedicle.Methods According to the size of defect of skin,design a skin flap with SMAS pedicle for repair of defect.Results The method has been successfully applied for skin defects of eyelid and lip in 14 cases with satisfied results.The area of the largest flap was 5 cm×3 cm.Conclusion Repairing facial defects such as eyelid skin defect or lip skin defect with skin flap of SMAS pedicle is a very good method.The flap has a good blood supporting and satisfactory color and flexibility.5 refs,6 figs.

甲基丙烯酰化改性真皮细胞外基质水凝胶促进腹壁缺损修复

背景:目前用于填充腹壁缺损部位的合成高分子材料(如聚丙烯或聚酯)不仅缺乏可降解性和生物活性,还难以适应复杂形状伤口需求,因此,找到免疫原性低、组织相容性好的生物活性材料成为腹壁缺损修复研究的热点。目的:制备甲基丙烯酰化改性真皮细胞外基质水凝胶,探讨其在腹壁缺损中的潜在应用价值。方法:(1)依次用0.25%胰蛋白酶、1%Triton X-100对猪真皮进行脱细胞处理,获得真皮细胞外基质;胃蛋白酶消化真皮细胞外基质,经甲基丙烯酸酐改性后光交联形成甲基丙烯酰化改性真皮细胞外基质水凝胶,扫描电镜观察水凝胶的微观形貌,测试其流变学性能、溶胀性等理化性质;(2)将L929成纤维细胞接种到甲基丙烯酰化改性的真皮细胞外基质水凝胶中,检测细胞相容性;(3)将12只SD大鼠随机分为2组(n=6),创建保留腹膜的腹壁缺损模型,聚丙烯组缺损部位填充聚丙烯材料,水凝胶组缺损部位填充甲基丙烯酰化改性真皮细胞外基质水凝胶,两组创面皮肤均用聚丙烯材料覆盖,观察创面愈合情况并进行组织学分析。结果与结论:(1)采用酶解法对猪真皮进行脱细胞后具有良好的脱细胞效果,并且原有的糖胺聚糖及胶原蛋白保留较好。扫描电镜下可见甲基丙烯酰化改性真皮细胞外基质水凝胶为疏松多孔结构,孔径在70-120μm之间,该水凝胶的溶胀比为(16.88±3.24)%,吸水率为(94.24±1.11)%,流变学性能测试表明该水凝胶状态稳定且具有剪切变稀特点,具备可注射性;(2)CCK-8检测与Live/Dead染色结果显示,甲基丙烯酰化改性真皮细胞外基质水凝胶具有良好的细胞相容性;(3)动物实验结果显示,实验组术后7,10,14 d的皮肤创面愈合率高于对照组(P <0.05);皮肤与肌层组织苏木精-伊红、Masson染色显示,与聚丙烯组比较,水凝胶组术后14 d的皮肤创面上皮化情况、毛囊生成、胶原纤维排列及新生血管情况更好,术后28 d的皮肤创面新生组织结构与正常组织相近,并且瘢痕增生较少,术后28 d时可见少量肌肉组织再生;(4)结果表明,甲基丙烯酰化改性真皮细胞外基质水凝胶可促进腹壁缺损大鼠的皮肤创面愈合和肌肉组织再生。

Vital roles of stem cells and biomaterials in skin tissue engineering

Tissue engineering essentially refers to technology for growing new human tissue and is distinct from regenerative medicine. Currently, pieces of skin are already being fabricated for clinical use and many other tissue types may be fabricated in the future.Tissue engineering was first defined in 1987 by the United States National Science Foundation which critically discussed the future targets of bioengineering research and its consequences. The principles of tissue engineering are to initiate cell cultures in vitro, grow them on scaffolds in situ and transplant the composite into a recipient in vivo. From the beginning, scaffolds have been necessary in tissue engineering applications. Regardless, the latest technology has redirected established approaches by omitting scaffolds. Currently, scientists from diverse research institutes are engineering skin without scaffolds. Due to their advantageous properties, stem cells have robustly transformed the tissue engineering field as part of an engineered bilayered skin substitute that will later be discussed in detail. Additionally, utilizing biomaterials or skin replacement products in skin tissue engineering as strategy to successfully direct cell proliferation and differentiation as well as to optimize the safety of handling during grafting is beneficial. This approach has also led to the cells' application in developing the novel skin substitute that will be briefly explained in this review.

Reparative histogenesis of skin: Reaction on the application of l-cysteine of argentum nitrate gel

The effect of L-cysteine of argentum nitrate gel on the wound process of experimental animals is investigated. The results show that the nanogel, being bacteriostatic, accelerates the course of inflammation phase resulting in fast cleansing of the wound surface and stimulation of the granulation tissue formation. The main cell elements of this tissue—fibroplasts are characterized by the state of functional excitation. The time of wound healing with the use of L-cysteine of argentum nitrate gel was reduced by three days, and the index of wound repair acceleration was about 20%.

In Vitro Study on the Repair Effect of Fibronectin Lyophilized Powder

Fibronectin has a good repair effect on skin,but its practical application is limited by its easy degradation and difficult preservation.Freeze-drying technology can extend the shelf life of biological products,but may cause damage to some of their biological activities.Therefore,it is necessary to conduct comprehensive and scientific testing of fibronectin lyophilized powder prepared by freeze-drying technology to evaluate its actual efficacy.In this study,by means of in vitro cell experiment,zebrafish animal model experiment and the experiment on the human skin,the safety of fibronectin lyophilized powder prepared by the new formula and the actual efficacy of skin repair were preliminarily and multidimensionally evaluated,so as to provide reference and basis for further research,human clinical trial and application.The results showed that fibronectin lyophilized powder prepared by the new formula had low cytotoxicity,significant ability of promoting cell migration and proliferation,and had stronger skin repair effect.The new Fibronectin lyophilized powder has the characteristics of good safety and strong skin repair effect,which shows that it has good development prospects.These results provide a new strategy for the development of skin repair products.

海藻糖敷料对激光损伤兔皮肤屏障功能的修复及体外促细胞生长、迁移和抗炎作用研究

目的:探究海藻糖敷料对激光损伤兔动物模型皮肤的修复作用,并探索其体外促细胞生长、迁移和抗炎作用。方法:试验兔脊柱两边各脱毛4个区域,随机分为正常组(N)、模型组(M)、对照组(P)和实验组(T)。除正常组外,其余各组使用激光照射造模;对照组及实验组分别使用透明质酸敷料及海藻糖敷料贴敷。于第0天、第3天、第7天、第14天和第21天对创面进行红斑和焦痂、水肿程度评分,以评价海藻糖敷料对皮肤修复效果。以L929细胞及HaCaT细胞为研究对象探索海藻糖敷料体外促细胞生长、迁移和抗炎作用。将细胞分为空白组(培养基)、正常组(细胞液+培养基)、对照组(细胞液+培养基+透明质酸)及实验组(细胞液+培养基+海藻糖)。使用MTT比色法检测各组L929细胞24 h、48 h及72 h增殖率,划痕试验检测各组L929细胞6 h、12 h和24 h迁移力;使用TNF-α及IFN-γ诱导HaCaT细胞建立炎症反应模型后,24 h后检测各组IL-6、IL-8和MDC表达水平。结果:创面给予敷料后7 d,实验组水肿评分[(1.1±0.3)分]较模型组[(1.2±0.4)分]显著降低(P<0.05);第14天,相较于模型组,实验组及对照组水肿、红斑焦痂评分有下降趋势但差异无统计学意义(P>0.05)。病理结果显示,对照组、实验组较模型组第14天炎细胞浸润微有减少。细胞实验结果显示,与正常组相比,对照组和实验组4 h、48 h及72 h的细胞增殖率均有明显增加;与正常组相比,对照组及实验组6 h、12 h和24 h的细胞迁移率均有明显增加(P<0.05);与细胞炎症模型组相比,实验组细胞上清液中IL-6、IL-8和MDC的表达水平明显降低(P<0.01)。结论:海藻糖敷料对激光所致兔皮肤屏障受损创面的组织炎症、愈合有一定修复作用;其机制可能与其能促进细胞增殖、细胞迁移及抑制炎症的功能相关。

耳后沟带蒂皮瓣修复联合循证护理对难治性耳前瘘管反复感染患儿疗效及美学效果观察

目的探讨耳后沟带蒂皮瓣修复联合循证护理在难治性耳前瘘管反复感染患儿瘘管修复的可行性及优势。方法随机将2020年2月~2022年1月收治的83例反复感染耳前瘘管患儿分为观察组(42例)和对照组(41例),两组患儿均实施耳前瘘管切除术,对照组耳前瘘管切除后直接周围皮肤减张拉拢缝合;观察组耳前瘘管切除后游离耳后沟皮瓣带蒂翻转至耳前缝合,术后配合循证护理。观察两组术后并发症、切口愈合程度、疗效及美学效果。结果两组患儿均顺利完成手术,对照组术后并发症发生率为19.51%,明显高于观察组2.38%,差异有统计学意义(χ2=4.651,P=0.031)。观察组切口Ⅰ期愈合率高于对照组,Ⅱ期愈合率低于对照组,差异均具有统计学意义(P<0.05)。随访1年,两组患儿耳前瘘管均痊愈,治愈率均为100%,但观察组平均愈合时间为(11.63±3.24)d,明显较对照组(19.25±4.81)d短,差异具有统计学意义(t=8.483,P=0.000)。观察组美学满意度为100%,明显高于对照,85.37%,差异有统计学意义(χ2=4.623,P=0.032)。结论耳后沟带蒂皮瓣修复难治性耳前瘘管反复感染创面安全、可靠,联合循证护理可有效降低术后并发症发生率,促进切口愈合和皮瓣存活,缩短治疗时间,提高美学效果。

股前外侧穿支皮瓣游离移植修复四肢皮肤缺损的临床疗效

目的:探究股前外侧穿支皮瓣游离移植修复四肢皮肤缺损的临床疗效。方法:选取2018年6月-2023年9月笔者医院收治的98例四肢皮肤缺损患者进行研究,患者皮肤软组织缺损面积为6.12 cm×9.34 cm~15.23 cm×32.74 cm,均行股前外侧穿支皮瓣游离移植修复,皮瓣切取面积为7.35 cm×10.34 cm~17.63 cm×34.49 cm。观察手术疗效、术后损伤部位功能、感觉恢复情况及术后并发症发生情况。结果:术后随访6个月,皮瓣全部成活,通过皮瓣供血优良度判断,术后优86例,良12例;DASH评分为18~24分,平均(21.46±1.27)分,下肢功能LEFS量表评分为36~52分,平均(43.97±5.57)分。79例患者感觉功能恢复至S3,其余恢复保护性感觉,两点辨别觉为5.3~8.2 mm。供区皮肤饱满红润,无感觉功能障碍。出现并发症共4例(4.08%),其中,感染3例,经抗感染治疗后得到控制;皮瓣边缘坏死1例,经换药或皮瓣移植后愈合,未发生血管危象、感觉障碍等情况。结论:股前外侧穿支皮瓣游离移植修复四肢皮肤缺损疗效显著,能够改善缺损部位的外观和功能,恢复损伤肢体感觉,并发症少,是一种较为理想的选择。

改良V-Y推进皮瓣对面部皮肤肿瘤术后缺损患者的修复效果研究

目的探究改良V-Y推进皮瓣对面部皮肤肿瘤术后缺损患者的修复效果。方法前瞻性选取河南宏力医院2020年2月至2023年2月收治的40例面部皮肤肿瘤切除术后皮肤缺损的患者,均接受改良V-Y推进皮瓣修复。结果40例患者皮片和皮瓣全部成活,其中创面为Ⅰ期愈合38例,并发皮瓣边缘部分坏死1例,经局部修剪换药后愈合;切口感染1例,经短期换药后愈合。随访1~12个月,失访1例,于术后1年复发3例,局部肿瘤复发1例,腮腺区淋巴结转移2例,均再次行根治性切除术治疗后行补充放疗,其余患者面部外形、功能均恢复良好36例,伤口美观满意度为94.44%(34/36)。结论改良V-Y推进皮瓣拓宽了V-Y推进皮瓣修复缺损的适应证,降低了术后一期继发性缺损及并发症发生率,皮瓣存活率高,且美观度好。

局部皮下蒂皮瓣修复非黑色素瘤皮肤癌一期切除术后缺损的效果及安全性

目的探究局部皮下蒂皮瓣对非黑色素瘤皮肤癌一期切除术后缺损的修复效果及安全性。方法选取2016年10月至2023年10月我院非黑色素瘤皮肤癌患者80例。对照组实施传统缝合(n=40),观察组采用皮下蒂皮瓣修复(n=40)。对比两组患者修复疗效、治疗后满意程度及不良反应。结果观察组患者修复疗效总有效率为95.00%大于对照组的75.00%(P<0.05);观察组患者治疗后总满意度为97.50%大于对照组的80.00%(P<0.05);术后两组患者各项创面评分均升高,且观察组更高,均有差异(P<0.05);观察组患者术后总不良反应发生率为7.50%低于对照组的27.50%(P<0.05)。结论对非黑色素瘤皮肤癌,于一期切除术后采用皮下蒂皮瓣修复的治疗方法,不仅可以提升患者术后愈合情况,还可以提高术后满意度,降低不良反应的发生,提高安全性。