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https://www.readbyqxmd.com/read/28425594/trilobed-pedicled-superior-gluteal-artery-perforator-flap-for-lumbosacral-defect-coverage
#1
Ji Min Kim, Jun Ho Lee, Deuk Young Oh, Suk-Ho Moon
BACKGROUND: There are many available options for the coverage of lumbosacral area defects. Surgeons usually use the superior gluteal artery perforator flap (SGAP) by rotational fashion, which risks complications, such as wound dehiscence or skin necrosis at the Y-point on the donor site due to the tension. In this report, the authors present the experience of using trilobed pedicled SGAP flaps in coverage of the lumbosacral area defects. METHODS: From 2011 to 2015, 16 trilobed pedicled SGAP flaps were performed for the coverage of sacral defects in our facility...
April 20, 2017: Microsurgery
https://www.readbyqxmd.com/read/28418661/systematic-dissociation-pathway-searches-guided-by-principal-component-modes
#2
Zhiye Tang, Chia-En A Chang
We introduce a novel method, Pathway Search guided by Internal Motions (PSIM), that efficiently finds molecular dissociation pathways of a ligand-receptor system with guidance from principal component (PC) modes obtained from molecular dynamics (MD) simulations. Modeling ligand-receptor dissociation pathways can provide insights into molecular recognition and has practical applications, including understanding kinetic mechanisms and barriers to binding/unbinding as well as design of drugs with desired kinetic properties...
April 18, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28416989/immediate-breast-reconstruction-of-a-nipple-areolar-lumpectomy-defect-with-the-l-flap-skin-paddle-breast-reduction-design-and-contralateral-reduction-mammoplasty-symmetry-procedure-optimizing-the-oncoplastic-surgery-multispecialty-approach
#3
Mitchell Buller, Adee Heiman, Jared Davis, Thomas J Lee, Nicolás Ajkay, Bradon J Wilhelmi
Objective: We describe a modification of the inferior pedicle reduction mammoplasty for oncoplastic reconstruction of a central tumor defect. Our technique involved a deepithelialized L-shaped medial inferior based flap with removal of lateral breast tissue after central lumpectomy with a contralateral Wise-pattern mastopexy with inferior pedicle for symmetry. This technique is ideal for patients with large, ptotic breasts that desire breast conservation with immediate reconstruction. Methods: A 47-year-old woman with size 38 DD breasts presented with a palpable 2-cm subareolar mass of the left breast...
2017: Eplasty
https://www.readbyqxmd.com/read/28410261/successful-continuous-adductor-canal-block-placement-in-a-patient-with-absent-sartorius-muscle-a-case-report
#4
Shin-E Lin, David B Auyong, Aaron B Dahl, Neil A Hanson
We report a novel case of a patient who presented for elective total knee arthroplasty and had distorted adductor canal anatomy due to previous sartorius rotational flap surgery. Despite the lack of a sartorius muscle on the intended operative limb, we describe the successful placement of a continuous adductor canal block. This case is a clinically relevant example that highlights the importance of the vastoadductor membrane as the anatomical anteromedial boundary for the adductor canal, and that it remains intact even after sartorius muscle flap surgery...
April 13, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28375969/elongated-dorsal-nasal-flap-to-reconstruct-large-defects-of-the-nose
#5
Pedro Redondo, Isabel Bernad, Ester Moreno, Marta Ivars
BACKGROUND: The typical reconstructive option for closing large-sized defects of the distal half of the nose is the paramedian forehead flap. Other alternatives are a melolabial interpolation flap and bilobed or trilobed flaps. The dorsal nasal (Rieger) flap is suitable for closing small-sized defects at this location, especially when they are medially located. OBJECTIVE: The authors describe a modified dorsal nasal flap reconstruction for large nasal defects. The novelty of this study lies in lengthening the leading edge of flap rotation, which may provide tissue either from the adjacent nasal skin, the nasofacial groove, or the cheek...
April 3, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28362636/an-aerodynamic-model-for-insect-flapping-wings-in-forward-flight
#6
Jong-Seob Han, Jo Won Chang, Jae-Hung Han
This paper proposes a semi-empirical quasi-steady aerodynamic model of a flapping wing in forward flight. A total of 147 individual cases, which consisted of advance ratios J of 0 (hovering), 0.125, 0.25, 0.5, 0.75, 1 and  ∞, and angles of attack α of  -5 to 95° at intervals of 5°, were examined to extract the aerodynamic coefficients. The Polhamus leading-edge suction analogy and power functions were then employed to establish the aerodynamic model. In order to preserve the existing level of simplicity, K P and K V, the correction factors of the potential and vortex force models, were rebuilt as functions of J and α...
March 31, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28356686/evaluating-the-use-of-octyl-2-cyanoacrylate-in-unilateral-cleft-lip-repair
#7
Vijaylaxmy Malhotra, J K Dayashankara Rao, Varun Arya, Shalender Sharma, Sushil Singh, Payal Luthra
BACKGROUND: Facial cosmetic results are one of the most concerning issues for the parents who get their children operated for cleft lip. Moreover, the postoperative care of the surgical site, the discomfort associated with the suture removal, and additional visit for suture removal are other reasons which encourages one to use any new technologies that may replace the need for suture placement. In this study, we used octyl-2-cyanoacrylate, a tissue adhesive which offers a viable alternative to traditional techniques without compromising optimal wound closure...
July 2016: National Journal of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28355184/smart-wing-rotation-and-trailing-edge-vortices-enable-high-frequency-mosquito-flight
#8
Richard J Bomphrey, Toshiyuki Nakata, Nathan Phillips, Simon M Walker
Mosquitoes exhibit unusual wing kinematics; their long, slender wings flap at remarkably high frequencies for their size (>800 Hz)and with lower stroke amplitudes than any other insect group. This shifts weight support away from the translation-dominated, aerodynamic mechanisms used by most insects, as well as by helicopters and aeroplanes, towards poorly understood rotational mechanisms that occur when pitching at the end of each half-stroke. Here we report free-flight mosquito wing kinematics, solve the full Navier-Stokes equations using computational fluid dynamics with overset grids, and validate our results with in vivo flow measurements...
April 6, 2017: Nature
https://www.readbyqxmd.com/read/28345420/peroneal-perforator-pedicle-propeller-flap-for-lower-leg-soft-tissue-defect-reconstruction-clinical-applications-and-treatment-of-venous-congestion
#9
Lifeng Shen, Yiyang Liu, Chun Zhang, Qiaofeng Guo, Wenhua Huang, Kelvin Kian Loong Wong, Shimin Chang
Objective To describe the characteristics of the perforator vessel in the peroneal artery of the lower leg and to explore the use of perforator pedicle propeller flaps to repair soft tissue defects in the lower leg, heel and foot. Methods This retrospective study enrolled patients with soft tissue defects of the distal lower leg, heel and foot who underwent surgery using peroneal perforator-based propeller flaps. The peroneal artery perforators were identified preoperatively by colour duplex Doppler ultrasound...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28326705/-rotation-and-advancement-of-the-radial-based-fasciocutaneous-flap-for-primary-closure-of-the-radial-forearm-flap-donor-defect
#10
Gao Zhengyang, Jiang Canhua, Chen Jie, Wu Limeng, Ren Hui, Long Fuqiang, He Chunrui, Jian Xinchun
OBJECTIVE: This study aims to investigate the feasibility and clinical application value of a new method for primary donor-site closure of radial forearm flaps with the use of rotation and advancement of radial-based fasciocutaneous flaps. METHODS: The forearm donor-site defects of 36 patients were primarily closed by rotation and advancement of radial-based fasciocutaneous flaps after radial flap harvest from November 2014 to May 2015. Patients included 28 males and 8 females aged 28 to 67 years (53...
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28326398/the-hemisoleus-rotational-flap-provides-a-novel-superior-autograft-reconstructive-option-for-the-treatment-of-chronic-extensor-mechanism-disruption
#11
Jean-Charles Auregan, James D Lin, Joseph M Lombardi, Eugene Jang, William Macaulay, Melvin P Rosenwasser
Chronic disruption of the extensor mechanism is a devastating problem after total knee arthroplasty. Quadriceps tendon ruptures occur at an estimated 0.1% prevalence in the setting of total knee arthroplasty. Complete tears of the quadriceps tendon generally have poor results and high rates of rerupture. We present a case of a quadriceps tendon rupture after total knee arthroplasty which reruptured after initial direct repair. The patient presented to us with a chronically retracted rerupture and was subsequently reconstructed successfully with a novel extended medial gastrocnemius-soleus-calcaneus local rotational pedicle flap...
June 2016: Arthroplasty Today
https://www.readbyqxmd.com/read/28321387/free-mucosal-graft-reconstruction-of-the-septum-after-nasoseptal-flap-harvest-a-novel-technique-using-a-posterior-septal-free-mucosal-graft
#12
Frederick Yoo, Edward C Kuan, Marvin Bergsneider, Marilene B Wang
Objectives The nasoseptal flap (NSF) has become the workhorse for reconstruction in endoscopic endonasal skull-base surgery. The NSF, though useful in reconstruction, may lead to significant donor site morbidity. Published techniques to reduce the donor site morbidity, free mucosal grafts, and septal rotational flaps have shown to reduce crusting and remucosalization times. We present a novel technique utilizing posterior septal mucosa as a free mucosal graft for reconstruction of the anterior septal donor site...
April 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28314066/comparison-of-propeller-perforator-flap-and-venous-supercharged-propeller-perforator-flap-in-reconstruction-of-lower-limb-soft-tissue-defect-a-prospective-study
#13
Benoit Chaput, Nicolas Bertheuil, Jean-Louis Grolleau, Farid Bekara, Raphael Carloni, Jerome Laloze, Christian Herlin
INTRODUCTION: In lower limbs, reliability of propeller perforator flaps (PPF) remains uncertain. The main complication is venous congestion, which can lead to distal necrosis. We aim to highlight if venous supercharging of PPF could substantially limit complications in lower limb coverage. METHODS: Between 2011 and 2016, we developed a standardized procedure of venous supercharging in the lower limb reconstruction with PPF using saphenous veins anastomosis. Then, we prospectively compared a consecutive series of 30 PPF to cover lower limbs defect, with a consecutive series of 30 venous-supercharged PPF (vsPPF)...
March 17, 2017: Microsurgery
https://www.readbyqxmd.com/read/28281468/design-and-stable-flight-of-a-21%C3%A2-g-insect-like-tailless-flapping-wing-micro-air-vehicle-with-angular-rates-feedback-control
#14
Hoang Vu Phan, Taesam Kang, Hoon Cheol Park
An insect-like tailless flapping wing micro air vehicle (FW-MAV) without feedback control eventually becomes unstable after takeoff. Flying an insect-like tailless FW-MAV is more challenging than flying a bird-like tailed FW-MAV, due to the difference in control principles. This work introduces the design and controlled flight of an insect-like tailless FW-MAV, named KUBeetle. A combination of four-bar linkage and pulley-string mechanisms was used to develop a lightweight flapping mechanism that could achieve a high flapping amplitude of approximately 190°...
April 4, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28279398/-perineal-reconstruction-salvage-surgery-with-2flaps-technique
#15
Marta Jiménez Gómez, Antonio Navarro-Sánchez, Jaime Lima Sánchez, Juan Ramón Hernández Hernández
BACKGROUND: The principles of perineal reconstructive surgery comprise adequate filling of the defect along with stable and durable skin coverage, with a low morbidity rate. Two-flap perineal reconstruction is a simple, fast and reliable technique that uses a single donor site. This improves scar position with low morbidity. It is based in the use of 2flaps; one flap fills the defect with a «turn over» technique and the other is a rotation - advancement flap for skin coverage. CLINICAL CASE: A 52-year-old male diagnosed with Lynch syndrome who underwent laparoscopic abdominoperineal amputation for adenocarcinoma of the lower rectum and developed recurrence 2years later over the perineal scar that required radical resection and perineal reconstruction...
March 6, 2017: Cirugia y Cirujanos
https://www.readbyqxmd.com/read/28273213/reconstruction-of-face-and-scalp-after-dog-bites-in-children
#16
Jefferson Lessa Soares Macedo, Simone Corrêa Rosa, Murilo Neves DE Queiroz, Tabatha Gonçalves Andrade Castelo Branco Gomes
OBJECTIVE: to evaluate the immediate reconstruction of face and scalp after canine bites in children. METHODS: we conducted a prospective series of cases treated at the Emergency Unit of the Asa Norte Regional Hospital, Brasília - DF, from January 1999 to December 2014. At the time of patient admission to the emergency, the primary wound closure of the face and scalp bite was performed, regardless of the time or day of the event. The primary treatment of the bites was by means of direct suture, flaps rotation or grafting, depending on the type of wound and surgeon's decision...
December 2016: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/28272152/aesthetic-reconstruction-of-the-frontotemporal-region-the-extended-a-t-plasty-a-workhorse-revisited
#17
Beniamino Brunetti, Stefania Tenna, Igor Poccia, Francesco Segreto, Paolo Persichetti
BACKGROUND: A-T plasty has long been a workhorse for defects located around the eyebrow or in the upper and lower lip. It allows like-with-like reconstruction with placement of the scars in natural creases or subunit junctions. In this article, the authors describe their refined technique to specifically address moderate to large size defects of the frontotemporal, preauricular, and zygomatic regions. MATERIALS AND METHODS: Thirty consecutive patients underwent reconstruction with the extended A-T plasty at our institution after skin cancer excision...
March 7, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28266001/composite-mesh-and-gluteal-fasciocutaneous-rotation-flap-for-perineal-hernia-repair-after-abdominoperineal-resection-a-novel-technique
#18
Marios Papadakis, Gunnar Hübner, Marzena Bednarek, Mohamed Arafkas
Perineal hernia is an uncommon complication following abdominoperineal rectum resection. Several surgical procedures have been proposed for perineal hernia repair, including perineal, laparoscopic and abdominal approaches. Repair techniques can be classified into primary suture techniques, mesh placements and repairs with autogenous tissue. We report a 68-year-old man with a perineal hernia, who underwent a pelvic floor reconstruction with a transperineal composite mesh and a gluteal fasciocutaneous rotation flap...
March 2017: Updates in Surgery
https://www.readbyqxmd.com/read/28263821/the-fisher-technique-for-correction-of-penile-torsion-in-children-who-are-the-candidates
#19
J B Marret, P Ravasse, L Raffoul, J Rod
OBJECTIVE: To report our experience in the treatment of penile torsion with a special reference to the Fisher technique. PATIENTS AND METHODS: We reviewed thirty cases of congenital penile torsion treated from 2009 to 2015 in a single center. Sixteen patients presented a moderate rotation of 45° to 90° and 14 had a severe rotation with an angle greater than 90°. Chordee was present in 17 cases and distal glanular hypospadias in 15 cases. Median age at surgery was 10 months...
March 2, 2017: Urology
https://www.readbyqxmd.com/read/28261939/comparison-of-fasciocutaneous-v-y-and-rotational-flaps-for-defect-coverage-of-sacral-pressure-sores-a-critical-single-centre-appraisal
#20
Gabriel Djedovic, Julia Metzler, Evi M Morandi, Tanja Wachter, Shafreena Kühn, Gerhard Pierer, Ulrich M Rieger
Pressure sore rates remain high in both nursing homes as well as in hospitals. Numerous surgical options are available for defect coverage in the sacral region. However, objective data is scarce as to whether a specific flap design is superior to another. Here, we aim to compare two fasciocutaneous flap designs for sacral defect coverage: the gluteal rotation flap and the gluteal V-Y flap. All primary sacral pressure sores of grades III-IV that were being covered with gluteal fasciocutaneous rotational or V-Y flaps between January 2008 and December 2014 at our institution were analysed...
March 6, 2017: International Wound Journal
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