Distally based perforator sural flaps for foot and ankle reconstruction

Distally based perforator sural flaps from the posterolateral or posteromedial lower leg aspect are initially a neurofasciocutaneous flap that can be transferred reversely to the foot and ankle region with no need to harvest and sacrifice the deep major artery. These flaps are supplied by a perforating artery issued from the deep peroneal artery or the posterior tibial artery, and the chainlinked adipofascial neurovascular axis around the sural/saphenous nerve. It is a versatile and reliable technique for soft-tissue reconstruction of the heel and ankle region with 180-degrees rotation. In this paper, we present its developing history, vascular basis, surgical techniques including flap design and elevation, flap variations in pedicle and component, surgical indications, and illustrative case reports with different perforating vessels as pivot points for foot and ankle coverage.

Applied distally based peroneus brevis muscle flaps for coverage of the soft tissue defects over the lower one-third of the leg, ankle and foot

Objective To investigate a simple, valuable new method for coverage of the soft tissue defect over the lower one-third of the leg, ankle and the foot. Methods The distally based peroneus brevis muscle fkps were applied for coverage of the soft tissue defects over the lower one-third of the leg,the ankle and the foot. The muscle flaps were covered with split-thickness skin grafts. Results The distally based peroneus brevis muscle flaps were applied for coverage of the soft tissue defects over the lower one-third of the leg, the ankle and the foot in 16 cases. The larges area of the soft tissue defect was 5 cm × 7 cm. The smallest was 3 cm × 4 cm. Primary healing occured in 14 cases undergoing muscle flap construction, second-stage healing occured in 2 cases, no total flap necrosis occured in any cases. Conclusion ThisChina Medical Abstracts(Surgery) technigue is a simple and complication are lesser. The successful rates are higher. This muscle flap is suitable to the mudium or small soft tissue

Adjoint-based optimization of flapping plates hinged with a trailing-edge flap

It is important to understand the impact of wing-morphing on aerodynamic performance in the study of flapping-wing flight of birds and insects. We use a flapping plate hinged with a trailing-edge flap as a simplified model for flexible/morphing wings in hovering. The trailing-edge flapping motion is opti- mized by an adjoint-based approach. The optimized configuration suggests that the trailing-edge flap can substantially enhance the overall lift. Further analysis indicates that the lift enhancement by the trailing- edge flapping is from the change of circulation in two ways： the local circulation change by the rotational motion of the flap, and the modification of vortex shedding process by the relative location between the trailing-edge flao and leading-edge main plate.

Versatility of Reverse Sural Fasciocutaneous Flap for Reconstruction of Distal Lower Limb Soft tissue Defects

Summary： In this study we present our experiences with the reverse sural fasciocutaneous flap to reconstruct the distal lower limb soft tissue defects caused by traumatic injuries. These flap graftings were carried out from Oct. 2010 to Dec. 2012 in our department. The series consisted of 36 patients, including 21 men and 15 women with an average age of 46.2 years （14-83 years） and with a medium followp period of 18 months （12-24 months）. Of all the cases of acute trauma, there were 10 eases of trauma of distal tibia, 9 cases of trauma of perimalleolus, and 17 cases of trauma of midfoot and forefoot. Related risk factors in the patients were diabetes （2 cases）, advanced age （〉65 years, 3 cases） and ciga- rette smoking （6 cases）. The reverse flow sural island flap irrigation depended on lower perforators of the peroneal artery. The fasciocutaneous pedicle was 3-4 cm in width and the anatomical structures consisted of the superficial and deep fascia, the sural nerve, short saphenous vein, superficial sural artery together with an islet of subcutaneous cellular tissue and skin. The most proximal border of the flap was only 1.5 cm away from the popliteal skin crease and the pivot point was 5-7 cm above the tip of the lateral malleolus. All the flaps survived. No arterial crisis occurred in any case. The venous congestion occurred in 2 cases and got better after raising the limbs and bloodletting. Only in an old man, 1.5 cm necrosis of distal margin of his flap occurred and finally healed after continuous dressing change. One-stage skin grafting was performed, and all the donor sites were sutured and successfully healed. It was concluded that the reverse sural fasciocutaneous flap is safe and reliable to extend to the proximal third even near the popliteal skin crease. We also concluded this flap can be safely and efficiently used to treat patients with large and far soft-tissue defects from the distal leg to the forefoot with more versatility and it is easier to reach the recipient sites.

“In situ bone flap” combined with vascular pedicled mucous flap to reconstruction of skull base defect

BACKGROUND At present,neuroendoscopy technology has made rapid development,and great progress has been made in the operation of lesions in the saddle area of the skull base.However,the complications of cerebrospinal fluid and intracranial infection after the operation are still important and life-threatening complications,which may lead to poor prognosis.AIM To investigate the method of in situ bone flap combined with nasal septum mucosal flap for reconstruction of enlarged skull base defect by endonasal sphenoidal approach and to discuss its application effect.METHODS Clinical data of 24 patients undergoing transnasal sphenoidal endoscopic approach in the Department of Neurosurgery,Affiliated 2 Hospital of Nantong University from January 2019 to December 2022 were retrospectively analyzed.All patients underwent multi-layer reconstruction of skull base using in situ bone flap combined with nasal septum mucosa flap.The incidence of intraoperative and postoperative cerebrospinal fluid leakage and intracranial infection were analyzed,and the application effect and technical key points of in situ bone flap combined with nasal septum mucosa flap for skull base bone reconstruction were analyzed.RESULTS There were 5 cases of high flow cerebrospinal fluid(CSF)leakage and 7 cases of low flow CSF leakage.Postoperative cerebrospinal fluid leakage occurred in 2 patients(8.3%)and intracranial infection in 2 patients(8.3%),which were cured after strict bed rest,continuous drainage of lumbar cistern combined with antibiotic treatment,and no secondary surgical repair was required.The patients were followed up for 8 to 36 months after the operation,and no delayed cerebrospinal fluid leakage or intracranial infection occurred during the follow-up.Computed tomography reconstruction of skull base showed satisfactory reconstruction after surgery.CONCLUSION The use of in situ bone flap combined with vascular pedicled mucous flap to reconstruction of skull base defect after endonasal sphenoidal approach under neuroendoscopy has a lower incidence of cerebrospinal fluid leakage and lower complications,which has certain advantages and is worthy of clinical promotion.

Two Cases of Distal Anterolateral Thigh Flap

We report our experience with two cases of anterolateral thigh flaps based on the musculocutaneous perforators arising from a more distal part of the descending branch than in the conventional anterolateral thigh flap. Case 1: A 53-year-old man with a skin ulcer over the anterior surface of the left tibia secondary to plate fixation for an open fracture. The perforator marked with preoperative Doppler was located 8 cm proximal to the superior border of the patella. Without thinning, the flap was 10 × 4 cm in size and 5 mm thick. Case 2: A 46-year-old man with necrosis of the right index finger after replantation. The flap was 5 × 3 cm in size and 3 mm in thickness. This “distal” anterolateral thigh flap can be raised as a quite thin flap with a long pedicle and, therefore, is considered useful in the reconstruction of various soft tissue defects.

Hybrid Procedure Utilizing Stent Grafts to Stabilize Distal Flaps after Common and Superficial Femoral Endarterectomy

Background: Endarterectomy has long been the standard for common femoral artery (CFA) occlusive disease. Hybrid procedures utilizing endovascular and open techniques have recently been used for revascularization. The purpose of this study was to evaluate the effectiveness of the use of a stent graft to stabilize the distal flap and prevent further dissection after extensive endarterectomy. Methods: All patients from Monmouth Medical Center in Long Branch, NJ from September 2008 to March 2013 who underwent an extensive common and superficial femoral (SFA) endarterectomy combined with the use of a Viabahn (Gore Medical) stent graft to stabilize the distal flap were included in the study. These stents were deployed in the proximal SFA after extensive endarterectomy, under direct visualization, without the aid of fluoroscopy. Due to the location in the SFA, these flaps were not amenable to suture tacking. Results: Fifteen patients met these criteria and were included in our study. Twelve patients underwent femoral endarterectomy for severe claudication and three patients for limb salvage. Technical success was achieved in all 15 patients. Five patients also had stents placed proximally to increase inflow and one patient had an additional stent placed distally to improve outflow. There were no intraoperative or postoperative complications. Conclusion: Stent graft placement allows a more extensive endarterectomy to be performed by stabilizing the distal flap allowing a safe transition into the true lumen that is not possible with suture tacking.

Clinical observation of endoscopic skull base reconstruction with an anterolateral thigh free fascia flap

Objective:Radiation osteonecrosis of the skull base after radiotherapy for nasopharyngeal carcinoma is one of the most serious complications,affecting patient survival and quality of life.To date,surgical resection is the main treatment for radiation osteonecrosis.The repair after the operation is very important.Inappropriate repair or lack of repair can easily cause local infection that can even spread to the brain,aggravating osteonecrosis.This study aimed to verify the feasibility and safety of the ante-rolateral thigh free fascia flap in repairing large skull base defects.Methods:From June 2021 to July 2022,a total of 12 patients with a history of radiotherapy for naso-pharyngeal carcinoma received surgical treatment at the Department of Otolaryngology Head&Neck Surgery,Sir Run Run Shaw Hospital,Zhejiang University School of Medicine.All patients were diagnosed with radiation osteonecrosis of the skull base with large skull base defects.During the endoscopic operation,a free anterolateral thigh fascia flap was used to repair the skull base and complete vascular anastomosis reconstruction.The preoperative and postoperative pain scores were retrospectively analyzed,and the dynamic changes in endoscopic surgery sites were observed.Results:The 12 patients had a median age of 58 y,with 8(66.7%)males and 4(33.3%)females.The median headache score for the patients was 5(4-7)before surgery.The patient's headache was significantly relieved postoperatively,with 11 patients having a score of 0 and one patient having a score of 1.The stench was completely resolved after the operation.There were no serious complications during the perioperative period or 12 months after the operation.Conclusion:The application of anterolateral thigh free fascia flap in skull base reconstruction is a safe and reliable reconstruction technique suitable for endoscopic surgical repair of large-scale skull base necrosis.

Human Memory/Learning Inspired Control Method for Flapping-Wing Micro Air Vehicles

The problem of flapping motion control of Micro Air Vehicles (MAVs) with flapping wings was studied in this paper.Based upon the knowledge of skeletal and muscular components of hummingbird, a dynamic model for flapping wing wasdeveloped.A control scheme inspired by human memory and learning concept was constructed for wing motion control ofMAVs.The salient feature of the proposed control lies in its capabilities to improve the control performance by learning fromexperience and observation on its current and past behaviors, without the need for system dynamic information.Furthermore,the overall control scheme has a fairly simple structure and demands little online computations, making it attractive for real-timeimplementation on MAVs.Both theoretical analysis and computer simulation confirms its effectiveness.

Propulsive performance of two-and three-dimensional flapping flexible plates

The propulsive performance of two- and three-dimensional （2D and 3D） flapping flexible plates in a fluid at rest is investigated by a finite element method for the plate motion and an immersed boundary-lattice Boltzmann method for the fluid flow. We consider a model that as the leading-edge of the plate takes a vertical oscillation, the entire plate moves freely due to the fluid-structure interaction. The effects of flexibility on the dynamics of the 2D and 3D flapping plates are investigated. It is found that a suitable flexibility is benefit for improving the propulsive performance. The results obtained in this study provide physical insight into the understanding of the dynamics of the flapping-based locomotion.

The Suture-Pull as a Refinement of the Gasket Implant Technique for Reconstruction after Endoscopic Skull Base Surgery

Introduction: Adequate reconstruction of the skull base is the key to avoiding cerebrospinal fluid (CSF) leak following endonasal skull base surgery. The use of an endocranial “gasket” plug has been reported for this and is used in our institution. We present a simple refinement of the “gasket” technique using commonly available materials that helps ensure proper size and positioning of the gasket by applying stress on a suture attached on the center of the gasket implant. Materials and Methods: We report a case of massive CSF leak following endonasal transsphenoidal surgery for pitui- tary macroadenoma. The skull base was reconstructed in a multi-layered fashion with fascia lata and bony buttress reinforced with a vascularized nasoseptal flap. In order to avoid implant slippage from too-small size or malpositioning, we performed a “stress test” using traction applied to a suture attached to the center of the implant (Medpor?), which allowed us to confirm intraoperatively that the buttress was positioned securely. Results: The patient did well without recurrence of CSF leak. At two-year follow-up, there has been no recurrence of CSF leak or occurrence local complica- tions. We have not verified whether bony regrowth into the implant has occurred. Conclusion: The suture-pull refinement of the gasket implant technique is a simple, inexpensive and low risk method to assure secure endocranial positioning over the skull base defect, and may prevent CSF leak resulting from too-small sizing or buttress malpositioning.

Minimally Invasive Pericranial Flap for Reconstruction after Endonasal Endoscopic Surgery of 30 Consecutive Patients

Objectives/Hypothesis: The introduction of intranasal pedicled flaps has reduced the incidence of postoperative cerebrospinal fluid (CSF) leaks to less than 5%. Nevertheless, in malignant tumors those flaps are not always available because of nasal septum invasion. Minimally invasive pericranial flaps (PCF) are associated with minimal adverse effects and good cosmetic appearance. In spite of that, there are only a few reports of this reconstructive technic limited to short surgical series and radio-anatomical analysis. Clinical results of a surgical cohort are presented. Study Design: Cohort prospective study. Methods: Clinical data, including age, gender, stage, histopathological findings, rate of complications and appearance of PCF at fifth day and two months postoperative were recorded. Postoperative morbidities were recorded as wound abnormalities, nasosinusal, orbital and central nervous system complications. Chi-squared test was used to correlate qualitative variables and Student-t-test to correlated qualitative and quantitative variables. Items were considered statistically significant with a p value of less than 0.05 (confidence Interval of 95%). Results: Thirty patients (18 males and 12 females) were registered. Mean age was 51.5 years ± 23.0 and range between 20 and 71 years. Most common histologic subtypes were adenocarcinoma, epidermoid carcinoma and squamous cell carcinoma. Complete resection of the tumor was achieved in all patients including surgical margins. Length of the PCF varies between 9.9 cm and 13.9 cm with a mean of 11.8 cm. There was an association between length of the flaps and the covering structure with the nose apex relation. None patient experienced postoperative cerebrospinal fluid (CSF) leak, frontal sinusitis or other complications. Conclusions: Minimally invasive PCF constitute a good and inexpensive reconstructive option in patients with malignant anterior cranial base tumors in whose nasoseptal flap was not a feasible option.

早期目标导向活动方案对胰腺肿瘤切除术后患者活动的影响

目的:分析早期目标导向活动方案在胰腺肿瘤切除术后患者中的临床应用效果,以期提高患者术后早期活动的有效性及主动性,促进患者术后康复。方法:随机选取2023年3月—5月在上海市某三级甲等医院完成胰腺手术的35名患者为对照组,2023年6月—8月的35名患者为实验组。对照组采取胰腺肿瘤切除术后常规护理措施,实验组除采取常规护理,在督促患者早期下床活动方面应用早期目标导向活动方案。对比两组患者术后首次下床、肛门排气、排便、经口饮水、导尿管拔除及胃管拔除时间来评价方案有效性;对比两组患者术后并发症及活动相关不良事件发生情况来评价方案安全性。结果:两组患者首次下床、肛门排气、排便、经口饮水时间差异有统计学意义(P<0.05),导尿管拔除、胃管拔除时间及术后并发症发生情况差异无统计学意义(P>0.05),两组患者均未发生活动相关不良事件。结论:早期目标导向活动方案对促进胰腺肿瘤切除术后患者早下床、早经口饮水、术后排气和排便方面是安全、有效的,且不增加术后出血、非计划拔管、死亡等风险。

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。

鼻内镜下经翼突入路手术中同侧鼻中隔黏膜瓣血运的保护及应用

目的 探讨鼻内镜下经翼突入路颅底手术中制备同侧鼻中隔黏膜瓣的技术要点及其有效性。方法 回顾性分析我科2021年3月~2022年2月鼻内镜下经翼突入路切除病变的7例放疗后鼻咽坏死和5例蝶窦侧隐窝脑膜脑膨出患者。术中,将同侧鼻中隔黏膜瓣根蒂分离到蝶腭孔周围后,再将黏膜瓣蒂部向外侧翻转以暴露翼突并保留供血动脉。总结术中同侧鼻中隔黏膜瓣的制备要点及其有效性。结果 本组12例患者同侧鼻中隔黏膜瓣全部成活,创面上皮化良好。术后,放疗后鼻咽坏死患者头痛和鼻腔恶臭症状均明显缓解,均未发生面部或软腭、硬颚麻木感;蝶窦侧隐窝脑膜脑膨出患者脑脊液鼻漏均治愈,但在术后,有2例出现面部麻木,3例软腭及硬颚麻木。结论 鼻内镜下经翼突入路手术中保留同侧鼻中隔黏膜瓣及其血运,能有效修补鼻咽部和蝶窦侧隐窝创面及颅底缺损。

顺行和逆行岛状皮瓣在手指末节离断伤后皮肤软组织缺损修复中的临床疗效对比

目的对比顺行和逆行岛状皮瓣在手指末节离断伤后皮肤软组织缺损修复中的临床疗效。方法选取南京市江宁医院2021年4月—2023年4月收治的80例手指末节离断伤患者为研究对象,以红蓝球抽签方式将其随机分为对照组(n=40)及观察组(n=40)。对照组采用指动脉逆行岛状皮瓣修复术治疗,观察组采用指动脉顺行岛状皮瓣修复术治疗。比较两组患者的临床疗效、伤指活动度、伤指血液循环、伤指恢复情况及围手术期并发症发生率。结果观察组的临床治疗有效率为97.50%,高于对照组的85.00%,差异有统计学意义(P<0.05)。观察组的两点辨别觉低于对照组,远侧指间关节活动度大于对照组,指甲长度长于对照组,组间差异有统计学意义(P<0.05)。观察组的血液循环优良率为100.00%,高于对照组的90.00%,差异有统计学意义(P<0.05)。观察组的伤指感觉恢复评分高于对照组,差异有统计学意义(P<0.05)。观察组的并发症发生率为7.50%,低于对照组的25.00%,差异有统计学意义(P<0.05)。观察组的手术时间及创面愈合时间均短于对照组,组间差异有统计学意义(P<0.05)。结论指动脉逆行与顺行岛状皮瓣修复手术的一般情况均较优,但指动脉顺行岛状皮瓣修复术在手指末节离断伤后皮肤软组织缺损修复方面的效果更佳,能更好地促进患者伤指活动及血液循环的恢复,手术时间及术后创面愈合时间均更短,综合疗效更佳,值得临床推广使用。

腕背中、远动脉弓第二交通支带蒂骨瓣治疗舟骨骨折不愈合的疗效

目的探讨采用腕背中、远动脉弓之间第二交通支为蒂的骨瓣治疗舟骨骨折不愈合的临床疗效。方法回顾性分析2015-04至2021-12河北医科大学第三医院手外科和武警河北总队医院骨科收治的32例舟状骨骨折不愈合患者的临床资料,所有患者均采用带血供的第二掌骨背侧基底骨瓣治疗,骨瓣血供基于腕背中、远动脉弓之间第二交通支。记录患者手术参数,术后腕关节活动范围采用测角仪测量,并与术前记录的测量值进行比较。使用视觉模拟量表评估手腕疼痛指数,并使用Mayo手腕评分对术后手腕功能进行评估。结果32例患者均成功完成手术,骨瓣平均尺寸为11 mm×6 mm×5 mm,平均血管蒂长16 mm。骨愈合时间8~16周,平均10周;平均随访30个月(26~37个月)。术后平均舟月角为13°(-4°~16°),明显好于术前的28°(21°~36°),差异有统计学意义(P<0.05);术后平均桡月角为10°,也明显优于术前的17°,差异有统计学意义(P<0.05)。与术前比较,术后CT冠面平均高长比、腕关节功能Mayo评分也明显优于术前。结论采用腕背中、远动脉弓之间第二交通支为蒂的第二掌骨背侧基底骨瓣治疗舟骨骨折不愈合效果显著。

围手术期护理在腓肠肌岛状穿支肌皮瓣修复胫骨远端骨折伴骨外露中的应用效果

目的:分析围手术期护理在腓肠肌岛状穿支肌皮瓣修复胫骨远端骨折伴骨外露中的应用效果。方法:选择2021年1月—2023年2月高州市人民医院收治的20例胫骨远端骨折伴骨外露患者,入院均提供腓肠肌岛状穿支肌皮瓣修复治疗,采用随机抽签法分为两组,各10例。对照组接受常规护理,观察组接受围手术期护理。对比两组术后皮瓣成活率、疼痛评分、踝关节功能及护理满意度。结果:研究组的皮瓣成活率高于对照组,但两组对比差异无统计学意义(P>0.05);术后1 d、术后3 d及随访2周,研究组的疼痛评分均明显低于对照组,差异有统计学意义(P<0.05);术后7 d、随访1个月、随访3个月,研究组的踝关节功能评分均明显高于对照组,差异有统计学意义(P<0.05);研究组的护理满意度明显高于对照组,差异有统计学意义(P<0.05)。结论:围手术期护理应用于腓肠肌岛状穿支肌皮瓣修复治疗的胫骨远端骨折伴骨外露患者,皮瓣成活率好,且可减轻疼痛,提高踝关节功能,提升护理满意度。

指固有动脉逆行岛状皮瓣和背侧穿支岛状皮瓣修复手指远节末端皮肤缺损的疗效对比

目的对比指固有动脉逆行岛状皮瓣和背侧穿支岛状皮瓣修复手指远节末端皮肤缺损的疗效。方法2020年8月~2022年9月收治的手指远节末端皮肤缺损病人128例,患指128根。采用随机数字表法分为侧支组和背支组,每组各64例,侧支组予以指固有动脉逆行岛状皮瓣修复术治疗,背支组予以指固有动脉背侧穿支岛状皮瓣修复术治疗。记录两组手术时间、术中出血量,术后随访12个月,评价移植皮瓣存活率、采用手指总主活动度(TAM)评分评价关节功能、远节移植皮瓣感觉功能、温哥华瘢痕量表评分(VSS)评价瘢痕程度、术后并发症。结果侧支组、背支组病人的手术时间分别为(50.03±12.41)分钟、(54.78±15.65)分钟,术中出血量分别为(22.65±10.03)ml、(26.52±12.61)ml,两组手术时间、术中出血量比较,差异无统计学意义(P>0.05)。术后12个月随访,所有病人远端缺损部分均正常愈合,两组皮瓣移植成功率均为100.00%,两组比较差异无统计学意义(P>0.05)。术后12个月,侧支组、背支组病人的VSS分别为(3.15±0.69)分、(3.17±0.62)分,两组比较差异无统计学意义(P>0.05);侧支组、背支组病人的TAM评分分别为(9.71±0.65)分、(10.93±0.71)分。侧支组TAM评分低于背支组,两组比较差异有统计学意义(P<0.05);侧支组、背支组病人皮瓣两点辨别觉分别为(8.93±2.05)mm、(7.51±1.64)mm,侧支组皮瓣两点辨别觉高于背支组,两组比较差异有统计学意义(P<0.05)。侧支组术后静脉回流障碍2例,不耐寒1例;背支组术后无并发症发生,两组比较差异无统计学意义(P>0.05)。结论与指固有动脉逆行岛状皮瓣修复术比较,指固有动脉背侧穿支岛状皮瓣修复术治疗手指远节末端皮肤缺损,术后手指功能恢复效果更为良好,且静脉回流障碍风险相对更低。

翻板闸支座布置对底板混凝土结构受力影响分析

借助三维有限元软件,对翻板闸采用不同数量的支座对底板混凝土结构进行受力分析,研究闸门在不同支座数量下对底板混凝土结构应力、应变及位移情况。结果表明:①不同数量闸门支座底板混凝土结构大主应力、应变分布特点比较相似,底板支座大主应力、应变值相对较大部位均在底板中下部位应力、应变集中区域,且数值相差不大,但随着支座数量越多,底板应力分布越均匀。②底板的总体位移方向一致,均以竖向位移为主,底板中后部位移值较小,底板前部位移值较大,总体位移量相对较小。