期刊文献+
共找到21,939篇文章
< 1 2 250 >
每页显示 20 50 100
Influence of Flap Parameters on the Aerodynamic Performance of a Wind-Turbine Airfoil
1
作者 Yuanjun Dai Jingan Cui +2 位作者 Baohua Li Cong Wang Kunju Shi 《Fluid Dynamics & Materials Processing》 EI 2024年第4期771-786,共16页
A numerical method has been used to analyze the flow field related to a NACA 0015 airfoil with and without a flap and assess the influence of the flap height and angle on the surface pressure coefficient,lift coeffici... A numerical method has been used to analyze the flow field related to a NACA 0015 airfoil with and without a flap and assess the influence of the flap height and angle on the surface pressure coefficient,lift coefficient,and drag coefficient.The numerical results demonstrate that the flap can effectively improve the lift coefficient of the airfoil;however,at small attack angles,its influence is significantly reduced.When the angle of attack exceeds the critical stall angle and the flap height is 1.5%of the chord length,the influence of the flap becomes very evident.As the flap height increases,the starting point of the separation vortex gradually moves forward and generates a larger wake vortex.Optimal aerodynamic characteristics are obtained for 1.5%(of the chord length)flap height and a 45°flap angle;in this case,the separation vortex is effectively reduced. 展开更多
关键词 AIRFOIL flap height flap angle lift-drag ratio aerodynamic characteristics
下载PDF
Nasal flap preservation in endoscopic dacryocystorhinostomy for nasolacrimal duct obstruction
2
作者 Marianne Romanos Charbel Medawar +1 位作者 Souheil Hallit Bassam Romanos 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第9期1633-1638,共6页
AIM:To compare surgical outcomes between the conventional endoscopic dacryocystorhinostomy(DCR)and a modified endoscopic DCR for the treatment of nasolacrimal duct obstruction(NLDO),and evaluate factors associated wit... AIM:To compare surgical outcomes between the conventional endoscopic dacryocystorhinostomy(DCR)and a modified endoscopic DCR for the treatment of nasolacrimal duct obstruction(NLDO),and evaluate factors associated with the surgical success rate.METHODS:Medical records of patients who underwent primary DCR surgery between January 2016 and July 2020 at the Otorhinolaryngology Department of Eye and Ear International Hospital,Lebanon were reviewed.RESULTS:The study group consisted of 50 consecutive modified endoscopic DCR and the control group consisted of 138 consecutive conventional endoscopic DCR.The success rates at 1y were 98.0%(49 out of 50)for modified DCR,significantly higher compared to 84.8%(117/138)for the conventional DCR;there was no significant difference in the success rate throughout the years in terms of both surgical techniques.The modified surgery vs traditional[adjusted odds ratio(aOR)=14.96]and having an adjunctive septoplasty surgery vs not(aOR=3.99)were significantly associated with higher odds of success.CONCLUSION:Mucosal flap preservation and apposition shows significant improvement in the surgical success rate.Moreover,there is no statistically significant difference found in terms of complication rate and mean operative time between the conventional and the modified techniques. 展开更多
关键词 nasolacrimal duct obstruction endoscopic dacryocystorhinostomy mucosal flap
下载PDF
When the Combination of a Chinese Flap and Dufourmentel Makes It Possible to Treat a Hopeless Case of Squamous Cell Carcinoma of the Upper Lip
3
作者 Silly Toure Abibou Ndiaye +3 位作者 Mouhamadou Makhtar Ndiaye Mamadou Coume Mame Sanou Diouf Baye Karim Diallo 《Open Journal of Stomatology》 2024年第7期327-335,共9页
Cancers of the lip are the leading cause of labial defects, and treatment is essentially surgical. The success of a repair is assessed by two essential criteria: The functional character of the lip (restoration of con... Cancers of the lip are the leading cause of labial defects, and treatment is essentially surgical. The success of a repair is assessed by two essential criteria: The functional character of the lip (restoration of continence allowing feeding) and the aesthetic quality of the repair. However, for many patients from countries whose medical infrastructure does not allow them to undertake complex reconstructions locally, medical transfers represent their only chance of treatment. The aim of this article is to share with you an extreme clinical case of labial reconstruction, the management of which was a real challenge, using two major flaps: the free ante-brachial flap and the DUFOURMENTEL-type bi-pediculated scalp flap. 展开更多
关键词 Surgical flap Reconstruction AESTHETIC Lip Cancer-Plastic Surgery
下载PDF
Impact of Blade-Flapping Vibration on Aerodynamic Characteristics of Wind Turbines under Yaw Conditions
4
作者 Shaokun Liu Zhiying Gao +2 位作者 Rina Su Mengmeng Yan Jianwen Wang 《Energy Engineering》 EI 2024年第8期2213-2229,共17页
Although the aerodynamic loading of wind turbine blades under various conditions has been widely studied,the radial distribution of load along the blade under various yaw conditions and with blade flapping phenomena i... Although the aerodynamic loading of wind turbine blades under various conditions has been widely studied,the radial distribution of load along the blade under various yaw conditions and with blade flapping phenomena is poorly understood.This study aims to investigate the effects of second-order flapwise vibration on the mean and fluctuation characteristics of the torque and axial thrust of wind turbines under yaw conditions using computational fluid dynamics(CFD).In the CFD model,the blades are segmented radially to comprehensively analyze the distribution patterns of torque,axial load,and tangential load.The following results are obtained.(i)After applying flapwise vibration,the torque and axial thrust of wind turbines decrease in relation to those of the rigid model,with significantly increased fluctuations.(ii)Flapwise vibration causes the blades to reciprocate along the axial direction,altering the local angle of attack and velocity of the blades relative to the incoming wind flow.This results in the contraction of the torque region from a circular shape to a complex“gear”shape,which is accompanied by evident oscillations.(iii)Compared to the tangential load,the axial load on the blades is more sensitive to flapwise vibration although both exhibit significantly enhanced fluctuations.This study not only reveals the impact of flapwise vibration on wind turbine blade performance,including the reduction of torque and axial thrust and increased operational fluctuations,but also clarifies the radial distribution patterns of blade aerodynamic characteristics,which is of great significance for optimizing wind turbine blade design and reducing fatigue risks. 展开更多
关键词 Wind turbine CFD numerical simulation aerodynamic characteristics yaw flapping vibration
下载PDF
Management of Square Carcinoma of the Lower Lip Using Camille-Bernard Flap under Local Anesthesia: When Constraints Dictate Our Attitude
5
作者 Silly Toure Mouhamadou Makhtar Ndiaye +3 位作者 Abibou Ndiaye Mame Sanou Diouf Birame Loum Baye Karim Diallo 《Open Journal of Stomatology》 2024年第4期191-197,共7页
Introduction: Squamous cell carcinomas of the lip essentially pose a therapeutic management problem. In the West, their treatment is done under general anesthesia and follows the classic rules of oncology. In our cont... Introduction: Squamous cell carcinomas of the lip essentially pose a therapeutic management problem. In the West, their treatment is done under general anesthesia and follows the classic rules of oncology. In our context of exercise, we sometimes have a different attitude dictated by various constraints. Observation: 55-year-old patient with no notable history, seen in consultation for a very large ulcerative-budding lesion on the right 2/3 of the lower lip with mucocutaneous involvement without lymph node findings found on examination. Faced with this suspicious lesion and the patient’s financial difficulties, we decided to operate under local anesthesia to remove this tumor. The oncological excision was followed by immediate plasty using a Camille-Bernard flap with a good immediate aesthetic and functional result and postoperative day 7. The patient was unable to take his surgical specimen to anatomy-pathology and was lost to follow-up due to lack of financial resources. On anatomo-pathological analysis of the surgical specimen, the margins were healthy with confirmation of squamous cell carcinoma (anapathological reading made for scientific interest). Discussion: The particular mentality of certain patients and their difficult financial conditions push us to have an unconventional therapeutic attitude in oncology, but which nevertheless makes it possible to resolve certain problems that we often face. Local anesthesia is possible and realistic in cases like ours and the results can be acceptable and life-saving. 展开更多
关键词 Squamous Cell Carcinoma Lower Lip Camille Bernard flap Local Anesthesia
下载PDF
Evaluation of the versatility of perforators-enhanced rhomboid flap technique for ischial sores reconstruction
6
作者 Waleed Aldabaany Ashraf Hussein Elghamry +1 位作者 Montaser Hosny Mohamed Yassin 《Chinese Journal of Plastic and Reconstructive Surgery》 2024年第2期65-71,共7页
Background: Prolonged pressure on the skin known as pressure sores, can cause frequent injuries to the skin and underlying tissues. However, several prevention approaches, including non-surgical and surgical managemen... Background: Prolonged pressure on the skin known as pressure sores, can cause frequent injuries to the skin and underlying tissues. However, several prevention approaches, including non-surgical and surgical management,are available. In flap surgery for pressure sores, a variety of flap types may be used;each offers certain benefits and some incidences of complications and recurrence. This study evaluated the versatility of the perforatorenhanced rhomboid flap technique for ischial sore construction.Methods: This prospective study was conducted in the Plastic Surgery Department of Fayoum University Hospital.The perforator-enhanced rhomboid flap technique was employed in 20 patients with ischial pressure sores who failed to respond to conservative treatment. A proper history was obtained and a preoperative arterial duplex was performed to determine the site of the prominent perforators for their preservation at the base of the flap.Postoperative follow-ups and evaluations were performed.Results: The mean age of the study group was 43.7 ± 13.1, ranging from 19 to 65 years. Moreover, 80% of the participants were males while 20% were female. The main etiology of the sores was paraplegia in 45% of cases.The mean surface area of sores was 24.8 ± 6.3 cm2. In 75% of cases, the color match of the flap was rated as excellent. Similarly, 70% of the patients rated flap thickness as excellent. In 55% of the cases, the scar appearance was deemed excellent. Overall satisfaction was reported as excellent by 40% of the patients, while only 5% reported poor satisfaction. Approximately, 10% of the cases were identified with seroma, and 30% had wound dehiscence of a mean size of 1.33 ± 0.98 cm and required around 6.8 ± 1.9 weeks to heal.Conclusion: The perforator-enhanced rhomboid flap technique is a versatile method for reconstructing ischial pressure sores owing to its technical ease, short operative time, reliable vascularity, aesthetic outcome, matching skin color, and short recovery time. The main limitations include large defects with large surface areas, lack of a nearby donor site for a rhomboid flap, and scarring from prior procedures around the sore. 展开更多
关键词 Ischial pressure sores Perforators-enhanced rhomboid flaps RECONSTRUCTION
下载PDF
Adaptability of bipedicled scalp advancement flap for coverage of huge scalp defects after tumor resection
7
作者 Waleed Aldabaany 《Chinese Journal of Plastic and Reconstructive Surgery》 2024年第1期16-21,共6页
Background:Several reconstructive techniques have been used to reconstruct scalp defects.Numerous researchers have studied the utilization of bipedicled scalp advancement flaps for scalp defect coverage.In this study,... Background:Several reconstructive techniques have been used to reconstruct scalp defects.Numerous researchers have studied the utilization of bipedicled scalp advancement flaps for scalp defect coverage.In this study,we will assess the adaptability of a bipedicled scalp advancement flap for coverage of huge scalp defects after tumor resection.Methods:This study was performed at the Plastic Surgery Department,Fayoum University Hospital,on 20 patients with huge scalp tumors treated by adequate excision and reconstructed using a bipedicled scalp advancement flap from December 2021 to July 2023.Results:The study was conducted on 20 patients:16(80%)were men and 4(20%)were women presenting with large scalp tumors.The mean age was 57.4 years(33-68 years).The sites of the tumors were 10(50%)occipital,6(30%)parietal,and 4(20%)parieto-occipital.No major complications occurred postoperatively,and the bipedicled flaps survived well in all cases,with no necrosis.Conclusion:Huge scalp defects after tumor resection can be safely reconstructed with a large versatile bipedicled advancement scalp flap,either transversely or longitudinally oriented,with favorable functional results and accepted aesthetic results,apart from the alopecic area over the grafted donor site,which can be treated by tissue expansion if desired later. 展开更多
关键词 Bipedicled advancement flap Huge scalp defects Tumor resection
下载PDF
Pedicled abdominal flap using deep inferior epigastric artery perforators for forearm reconstruction: A case report
8
作者 Jae Hyung Jeon Kyung Wook Kim Hong Bae Jeon 《World Journal of Clinical Cases》 SCIE 2024年第4期828-834,共7页
BACKGROUND Pedicled abdominal flaps are a widely used surgical technique for forearm reconstruction in patients with soft tissue defects.However,some drawbacks include restricted flap size,partial flap loss,and donor-... BACKGROUND Pedicled abdominal flaps are a widely used surgical technique for forearm reconstruction in patients with soft tissue defects.However,some drawbacks include restricted flap size,partial flap loss,and donor-site morbidity.To address these concerns,we present a case of a pedicled abdominal flap using the deep inferior epigastric artery perforators(DIEP)for forearm reconstruction in a patient with a large soft tissue defect.CASE SUMMARY A 46-year-old male patient was admitted to our hospital with forearm injury caused by a pressing machine.A 15 cm×10 cm soft tissue defect with complete rupture of the ulnar side structures of the forearm was found.One week after orthopedic management of the neurovascular injury and fractures using the first stage of Masquelet technique,the patient was referred to the plastic and recon-structive surgery department for wound coverage.Surgical debridement and negative-pressure wound therapy revealed a 20 cm×15 cm soft tissue defect.A pedicle abdominal flap with the DIEP was used to cover the defect.Three weeks later,the flap was detached from the abdomen,and the abdominal defect was directly closed.Subsequently,the second stage of Masquelet technique was performed at the fracture site at week 10.Finally,all donor and recipient sites healed without complications,such as flap dehiscence,infection,hematoma,or necrosis.Fracture site osteosynthesis was achieved without complications.CONCLUSION Pedicled abdominal flap using the DIEP provides a reliable option for forearm reconstruction in patients with large soft tissue defects. 展开更多
关键词 Forearm injury Open fracture reduction Perforator flap Deep inferior epigastric artery perforators Case report
下载PDF
Lateral circumflex femoral artery perforator flap for the reconstruction of head soft tissue defects:Cross-region venous anastomosis
9
作者 Gongxue Zhang Wenhu Jin +3 位作者 Ziyang Zhang Lei Shi Rui Yang Dali Wang 《Chinese Journal of Plastic and Reconstructive Surgery》 2024年第3期111-115,共5页
Background:Owing to its unique characteristics,the lateral circumflex femoral artery perforator(LCFAP)flap is often preferred for repairing head wounds with exposed skulls.However,given the vascular distribution in th... Background:Owing to its unique characteristics,the lateral circumflex femoral artery perforator(LCFAP)flap is often preferred for repairing head wounds with exposed skulls.However,given the vascular distribution in the head,particularly the veins,can lead to postoperative complications such as venous congestion of the flap.The rates of vascular exploration and necrosis in these flaps are significantly higher than in other body regions.Therefore,it is crucial to identify a safe and effective method for venous anastomosis of free flaps in the head region.Methods:This retrospective case series study included 10 patients with large head soft tissue defects treated at the Burn and Plastic Surgery Department of the Affiliated Hospital of Zunyi Medical University from January 2020 to December 2022.The head defects were reconstructed using LCFAP flaps,with flap veins anastomosed to the external jugular vein in the neck,either directly or via a bridging technique.Results:Among the 10 adult patients with massive head wound defects,7(70%)were men.The patients’mean age was 53.0 years(48–59 years).The wound defects were caused by trauma in 6(60%)patients and by tumors in 4(40%)patients.Postoperatively,no significant complications occurred,and all LCFAP flap survived without necrosis.Conclusion:The descending branch of the LCFAP flap effectively repairs massive head wound defects.The venous anastomosis method for this flap is associated with a low incidence of venous complications and a high patency rate,making it a clinically valuable reference. 展开更多
关键词 Descending branch of lateral External jugular vein Wound repair Perforator flap
下载PDF
Thrust Optimization of Flapping Wing via Gradient Descent Technologies
10
作者 Jeshwanth Kundem 《Open Journal of Fluid Dynamics》 2024年第2期83-99,共17页
The current work aims at employing a gradient descent algorithm for optimizing the thrust of a flapping wing. An in-house solver has been employed, along with mesh movement methodologies to capture the dynamics of flo... The current work aims at employing a gradient descent algorithm for optimizing the thrust of a flapping wing. An in-house solver has been employed, along with mesh movement methodologies to capture the dynamics of flow around the airfoil. An efficient framework for implementing the coupled solver and optimization in a multicore environment has been implemented for the generation of optimized solutionsmaximizing thrust performance & computational speed. 展开更多
关键词 Steepest Descent CFD flapping Wing Airfoil Thrust Performance
下载PDF
Utility of Preoperative Positron Emission Tomography (PET) in Localizing Perforator Vessels of Anterolateral Thigh Free Flap
11
作者 Alexandra McMillan Sameer A. Alvi +3 位作者 Zaid Al-Qurayshi Zachary Fleishacker Nitin A. Pagedar Marisa R. Buchakjian 《International Journal of Otolaryngology and Head & Neck Surgery》 2024年第4期275-284,共10页
Objectives: The anterolateral thigh (ALT) flap is often considered the workhorse in soft tissue reconstruction of head and neck defects secondary to trauma, infection, or tumor resection. Despite its many advantages, ... Objectives: The anterolateral thigh (ALT) flap is often considered the workhorse in soft tissue reconstruction of head and neck defects secondary to trauma, infection, or tumor resection. Despite its many advantages, ALT flaps have been criticized due to variability in vasculature, which may result in inadequate or non-existent perforators. This retrospective study aims to investigate the utility and validity of positron emission tomography (PET) scan to identify the location and characteristics of perforators to the ALT flap. Methods: We performed a 10-year retrospective review of ALT flaps at our institution to identify patients with preoperative PET scans available for analysis. Three reviewers (attending physician, fellow, and resident) were asked to identify the number, location, and characteristics (myocutaneous versus septocutaneous) of ALT perforators on imaging, and reviewer agreement was assessed. Results were then compared to available operative data. Results: One hundred twenty-one patients were identified who underwent ALT free flap surgery. Thirty-eight preoperative PET scans were identified for review. At least one perforator was identified in 92.1% of scans. Agreement percentages regarding the number of perforators ranged from 53% - 61% whereas agreement regarding the location of a single perforator ranged from 79% - 90%. However, reviewers did not agree regarding the type of perforator, with agreement ranging from 34% - 53%. Poor agreement was observed when compared to intraoperative data, with the number of perforators ranging from 26% - 34% and the type of perforator 11% - 24%. These findings are likely due to insufficient data available in operative reports. Conclusion: Although initial studies suggest that PET scan shows promising evidence to support the capacity to preoperatively identify ALT perforators, future prospective studies are warranted to fully validate these findings. 展开更多
关键词 Anterolateral Thigh flaps Positron Emission Tomography Head and Neck Defects Perforator Mapping
下载PDF
Sternocleidomastoid flap for reconstruction of tongue small cell carcinoma: A case report
12
作者 Hendry Irawan Made Bagus Sastrapramaya Bharata 《World Journal of Surgical Procedures》 2024年第2期8-14,共7页
BACKGROUND The management of tongue carcinoma is excision and radical neck dissection followed with reconstruction.This is a case report of a patient with tongue squamous cell carcinoma(SCC)who underwent the procedure... BACKGROUND The management of tongue carcinoma is excision and radical neck dissection followed with reconstruction.This is a case report of a patient with tongue squamous cell carcinoma(SCC)who underwent the procedure with sternocleidomastoid(SCM)flap reconstruction.CASE SUMMARY A 52-year-old woman without smoking history complained tongue ulcer since 3 years ago.Based on the histopathological examination,the patient was diagnosed with T2N2M0 right tongue SCC and underwent wide excision of tumor;right mandibular;neck dissection and were reconstructed with SCM flap.CONCLUSION SCC of the tongue requires wide excision and dissection of the neck and mandible if infiltration into the surrounding lymph nodes has been found.The SCM flap reconstruction could be used post-surgery. 展开更多
关键词 Sternocleidomastoid flap Neck dissection Mandibular dissection Squamous cell carcinoma of the tongue Case report
下载PDF
“In situ bone flap” combined with vascular pedicled mucous flap to reconstruction of skull base defect 被引量:1
13
作者 Ming Qian Xi Chen +3 位作者 Long-Yao Zhang Zhi-Feng Wang Yi Zhang Xue-Jian Wang 《World Journal of Clinical Cases》 SCIE 2023年第29期7053-7060,共8页
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 f... 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. 展开更多
关键词 In situ bone flap Nasal septum mucosa flap Multilayer reconstruction Skull base reconstruction NEUROENDOSCOPY Endonasal sphenoidal approach
下载PDF
Two-step strategy—conjunctival flap covering surgery combined with secondary deep anterior lamellar keratoplasty for the treatment of high-risk fungal keratitis 被引量:1
14
作者 Yu-Chen Wang Jia-Song Wang +3 位作者 Bei Wang Xi Peng Hua-Tao Xie Ming-Chang Zhang 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2023年第7期1065-1070,共6页
AIM:To investigate whether the two-step strategy[conjunctival flap covering surgery(CFCS)combined with secondary deep anterior lamellar keratoplasty(DALK)]is effective for patients with high-risk fungal keratitis(FK).... AIM:To investigate whether the two-step strategy[conjunctival flap covering surgery(CFCS)combined with secondary deep anterior lamellar keratoplasty(DALK)]is effective for patients with high-risk fungal keratitis(FK).METHODS:In this noncomparative,retrospective case series,10 subjects(6 males,4 females)with a mean age of 56.5±7.1(range 47-72)y with high-risk FK undergone the two-step strategy were included.Reported outcome measures were healing of the corneal ulcer,recurrence of FK,reject reaction,improvement in best corrected visual acuity(BCVA)and relevant complications.RESULTS:The average diameter of corneal infiltrates was 7.50±0.39 mm,ranging from 6.94 to 8.13 mm.The mean depth of corneal infiltrates was 422.4±77.1μm,ranging from 350 to 535μm.The mean corneal thickness was 597.4±117.3μm,ranging from 458 to 851μm.Hypopyon and endothelial plaques were presented in all patients.The period between the two steps was 3.65±0.9(ranging from 3 to 5)mo.The graft diameter was 7.75±0.39 mm.At the last follow-up(average 9.25±3.39,ranging from 5.5 to 17mo),no fungal recurrence or graft rejection appeared,and all patients showed improvement of BCVA.One patient suffered from liver function impairment due to oral voriconazole for 4wk and recovered spontaneously after 1wk of drug withdrawal.CONCLUSION:The two-step strategy is safe and effective in the treatment of high-risk FK by transforming intentional therapeutic penetrating keratoplasty during acute infection to later optical DALK.It is a practical strategy,especially in areas lacking fresh donor corneas and eye bank services. 展开更多
关键词 HIGH-RISK fungal keratitis conjunctival flap deep anterior lamellar keratoplasty two-step strategy
下载PDF
Salvage anastomosis in free PAP-flap breast reconstruction:What about free flap neovascularization?
15
作者 Michael Hepp Aline Berners +3 位作者 Christine Deconinck Genevieve Pirson Maxime Servaes Philippe Fosseprez 《Chinese Journal of Plastic and Reconstructive Surgery》 2023年第4期178-181,共4页
Since the emergence of microsurgery in reconstructive surgery, free flaps have become a key tool in the management of patients with breast cancer. One such flap is the profunda artery perforator(PAP) flap. To date,the... Since the emergence of microsurgery in reconstructive surgery, free flaps have become a key tool in the management of patients with breast cancer. One such flap is the profunda artery perforator(PAP) flap. To date,there is no scientific consensus on whether voluminous free flaps remain dependent on their vascular pedicle throughout their lifespan. Therefore, the pedicle should always be carefully protected during revision surgery.In this article, we review the case of a middle-aged woman who suffered a pedicle transection needing reanastomosis during revision surgery six months after free-flap breast reconstruction. A 52-year-old woman who noticed a firm nodule in her right breast and armpit was referred to our department for surgical management. The Caucasian woman presented with no significant medical history or symptoms at the first consultation. Ultrasound-guided biopsy confirmed an invasive grade Ⅲ lobular carcinoma. Following staging,the patient underwent neoadjuvant chemotherapy before a right mastectomy with a complete homolateral axillary lymph node dissection and postoperative radiotherapy. One year after completing radiotherapy, free flap reconstruction with a PAP flap was performed, and six months later, revision surgery was required to enhance the volume of the reconstructed breast with a tissue expander and later an implant. Unfortunately,pedicle transection occurred during revision surgery, causing complete devascularization of the flap, which was confirmed by intraoperative Indocyanine Green imaging. The authors elected to perform salvage reanastomosis during the surgery. In keeping with the author’s 23-year experience with free flaps, the vascular pedicle should always be preserved in voluminous free flaps, as neovascularization alone may not ensure whole flap survival. The authors suggest always attempting re-anastomosis if vessels are compromised during revision surgery. 展开更多
关键词 Free flap Autonomy Vascular pedicle REVASCULARIZATION PAP flap MICROSURGERY
下载PDF
Nasal sill reconstruction with the Abbe flap after skin cancer resection:A case report
16
作者 Renata Fernanda Ramos Marcante Oona Tomiê Daronch +1 位作者 Murilo Sgarbi Secanho Maria Madalena Silva 《Chinese Journal of Plastic and Reconstructive Surgery》 2023年第2期64-67,共4页
Local flaps are widely known as the best option for partial nasal reconstructions depending on donor tissue laxity,vascularization,and defect shape and size.The nasolabial flap is used more often in the nasal sill.For... Local flaps are widely known as the best option for partial nasal reconstructions depending on donor tissue laxity,vascularization,and defect shape and size.The nasolabial flap is used more often in the nasal sill.For larger defects,greater tissue mobilization with larger scars or free flaps is required.Historically,the Abbe flap has been used for lip reconstruction in patients with cleft lip deformities.It allows less retraction than other local flaps or skin grafts in patients with large defect sizes and great defect depths.This study reported on the application of the Abbe flap for nasal sill reconstruction on a 71-year-old female patient with nasal sill basal cell carcinoma who had undergone resection surgery with a posterior lip switch operation with satisfactory results.The application of the Abbe flap could be considered in patients with multiple previous surgeries and at risk for necrosis. 展开更多
关键词 Surgical flaps Myocutaneous flap NOSE Nasal diseases Nasal defects NEOPLASMS Basal cell
下载PDF
Subcutaneous pedicled propeller flap technique for microscopic reconstruction of eyelid defects
17
作者 Lei Zhong Qian-Yi Lu Pei-Rong Lu 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2023年第7期1047-1052,共6页
AIM:To describe the subcutaneous pedicled propeller flap technique for the microscopic reconstruction of eyelid defects and evaluate its outcomes.METHODS:The clinical data of 23 patients(23 eyes)who underwent microsco... AIM:To describe the subcutaneous pedicled propeller flap technique for the microscopic reconstruction of eyelid defects and evaluate its outcomes.METHODS:The clinical data of 23 patients(23 eyes)who underwent microscopic reconstruction of eyelid defects with the subcutaneous pedicled propeller flap technique were retrospectively analyzed.All patients underwent eyelid tumor resection and one-stage microscopic reconstruction with the subcutaneous pedicled propeller flap for anterioror posterior-layer eyelid defects.The survival rate of the propeller flap,eyelid function and appearance,tumor recurrence rate,and patient satisfaction were evaluated after the surgery.RESULTS:The patients consisted of 12 men and 11 women,aged 31–82y(mean,58.9y).The longest followup time was 5y,and the shortest was 3mo.All the propeller flaps survived well.There was no significant difference in color and luster between the flap and adjacent tissues,and there was no dog ear phenomenon.No obvious scarring was observed.There were no obvious abnormalities of eyelid morphology or function,and no adverse complications such as exposure keratitis,entropion,ectropion,ptosis,and eyelid retraction.No tumor recurrence was found at the time of the last follow-up.All patients were satisfied with the surgical results.CONCLUSION:The subcutaneous pedicled propeller flap technique for the microscopic reconstruction of eyelid defects has satisfactor y outcomes in terms of eyelid function and esthetics,and merits clinical application. 展开更多
关键词 propeller flap eyelid defect microscopic reconstruction
下载PDF
Supraclavicular artery island flap for reconstruction of hypopharynx and upper esophagus defects:A case report and literature review
18
作者 Xiaorong Ma Xiaoting Sun +2 位作者 Yuexin Shi Kaiyang Lv Wenbin Chen 《Chinese Journal of Plastic and Reconstructive Surgery》 2023年第3期130-135,共6页
We report a case of a 74-year-old female with hypopharyngeal cancer who developed a pharyngoesophageal fistula and neck skin defect after total laryngectomy.To reconstruct the hypopharynx,upper esophagus,and neck skin... We report a case of a 74-year-old female with hypopharyngeal cancer who developed a pharyngoesophageal fistula and neck skin defect after total laryngectomy.To reconstruct the hypopharynx,upper esophagus,and neck skin defect,we used a supraclavicular artery island flap(SCAIF)for one-stage reconstruction.SCAIF offered reliable blood supply,minimal donor site morbidity,and excellent cosmetic outcomes.Although a small portion of the flap developed necrosis,it healed without surgical intervention.We also conducted a literature review of previously published articles on SCAIF for head and neck reconstruction.Our review highlights the advantages and limitations of SCAIF as a promising option for one-stage reconstruction of complex hypopharyngeal and upper esophageal defects with neck skin defects in selected patients.This case report provides valuable insights into the use of SCAIF in complex head and neck reconstructions,which can help improve patient outcomes and quality of life. 展开更多
关键词 Pharyngo-esophageal fistula Supraclavicular artery island flap Head and neck reconstruction Pedicled flap COMPLICATIONS
下载PDF
Preliminary study on the efficacy of lacrimal duct reconstruction with pedicled conjunctival flap in the treatment of severe lacrimal canalicular obstruction with conjunctivochalasis
19
作者 Gao-Xiang Ouyang Fang Bai Hai Tao 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2023年第4期539-546,共8页
AIM:To determine the efficacy and safety of pedicled conjunctival lacrimal duct reconstruction in the treatment of severe obstruction of superior and inferior lacrimal canaliculi with conjunctivochalasis.METHODS:This ... AIM:To determine the efficacy and safety of pedicled conjunctival lacrimal duct reconstruction in the treatment of severe obstruction of superior and inferior lacrimal canaliculi with conjunctivochalasis.METHODS:This study was per formed as a retrospective analysis of patients who received conjunctival dacryocystorhinostomy with pedicled conjunctival flap reconstruction combined with tube intubation due to severe superior and inferior lacrimal canalicular obstruction with conjunctivochalasis from January 2019 to October 2019.The clinical data included the degree of preoperative epiphora and postoperative relief,preoperative examination of lacrimal duct computed tomography and ultrasound biomicroscopy,postoperative evaluation of lacrimal duct function by chloramphenicol taste and fluorescein dye disappearance test,etc.Syringing was carried out to determine the reconstruction and patency of the lacrimal duct.RESULTS:All 9 patients(9 eyes)had severe canalicular obstruction with conjunctivochalasis.The patients included 4 males and 5 females aged between 47–65y with an average age of 52.2±6.7y.At 3mo follow-up,the tube was removed and the patients were followed for a further 3mo.After tube removal,6 patients showed no epiphora.These patients also had positive chloramphenicol tastes and normal fluorescein dye disappearance test results.Two patientshad epiphora.Also,syringing showed partial patency of the reconstructed lacrimal duct.One patient had no improvement in epiphora with negative chloramphenicol taste and fluorescein dye disappearance test results and obstruction of the reconstructed lacrimal duct.The total effective rate of the operation was 8/9,with no serious complications.CONCLUSION:Pedicled conjunctival lacrimal duct reconstruction conjunctival dacryocystorhinostomy is safe and effective for superior and inferior canalicular obstruction with conjunctivochalasis. 展开更多
关键词 EPIPHORA severe lacrimal canalicular obstruction conjunctival dacryocystorhinostomy pedicled conjunctival flap reconstruction CONJUNCTIVOCHALASIS
下载PDF
Measurement of combined flap thickness for reconstruction of decubitus ulcer using computed tomography
20
作者 Eun Chan Kim Jeong Do Park +1 位作者 Syeo-Young Wee Se-Young Kim 《World Journal of Clinical Cases》 SCIE 2023年第31期7562-7569,共8页
BACKGROUND Various reconstruction options have been introduced to treat decubitus ulcers.A combined flap that takes advantage of the fasciocutaneous and muscle flaps has been proven to be effective in reconstructing d... BACKGROUND Various reconstruction options have been introduced to treat decubitus ulcers.A combined flap that takes advantage of the fasciocutaneous and muscle flaps has been proven to be effective in reconstructing decubitus ulcers in previous studies.However,no studies have measured combined flap thickness.This is the first study to demonstrate the superiority of the combined flap by measuring its thickness using enhanced abdominopelvic computed tomography(APCT).AIM To evaluate combined flap modality as a useful reconstruction option for decubitus ulcers using measurements obtained through APCT.METHODS Fifteen patients with paraplegia who underwent combined flap surgery for reconstruction of decubitus ulcers between March 2020 and December 2021 were included.The defects in the skin and muscle components were reconstructed separately.The inner gluteus muscle flap was split and manipulated to obliterate dead space.The outer fasciocutaneous flap was transposed to cover the muscle flap and opening of the decubitus ulcer.Subsequently,we performed enhanced APCT at 3 wk and 6 mo postoperatively to measure the flap thickness.RESULTS The mean flap thickness was 32.85±8.89 mm at 3 wk postoperatively and 29.27±8.22 mm at 6 mo postoperatively.The flap thickness was maintained without any major complications such as contour deformities or recurrence.CONCLUSION Although there was a significant decrease in flap thickness as measured by APCT,the combined flap provided sufficient padding and maintained its thickness even at 6 mo after reconstruction,suggesting that the combined flap modality may be a useful reconstruction option for patients with paraplegic decubitus ulcers. 展开更多
关键词 Computed tomography Decubitus ulcer ISCHIUM Surgical flaps Trochanter
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部