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https://www.readbyqxmd.com/read/28550242/impact-of-groin-flap-ischemia-reperfusion-on-red-blood-cell-micro-rheological-parameters-in-a-follow-up-study-on-rats
#1
Zsuzsanna Magyar, Abel Molnar, David Belkin Nachmias, Din Mann, Viktoria Sogor, Anita Mester, Katalin Peto, Norbert Nemeth
BACKGROUND: Flap hypoperfusion or ischemia-reperfusion (I/R) may occur during preparation-transposition procedures and by postoperative thrombotic complications. Behind the microcirculatory disturbances micro-rheological alterations are also supposed. OBJECTIVE: We aimed to investigate the groin flap I/R with following-up micro-rheological parameters. METHODS: Anesthetized rats were subjected to Control or I/R groups. Groin flaps were prepared bilaterally, pedicled on the superficial epigastric vessels...
May 24, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28529663/the-modified-dunn-procedure-for-slipped-capital-femoral-epiphysis-the-bernese-experience
#2
M Tannast, L M Jost, T D Lerch, F Schmaranzer, K Ziebarth, K A Siebenrock
PURPOSE: Based on previous investigations on the vascular blood supply to the femoral head, a technique for anatomical reduction after slipped capital femoral epiphysis was developed. This technique is a modification of the original technique by Dunn using a retinacular soft-tissue flap. This allows the visual control of the epiphyseal vascular blood supply. We report the experience at the inventor's institution with a critical discussion of the available literature. METHODS: Using a trochanteric osteotomy for surgical dislocation of the hip, a retinacular soft tissue flap is created containing the deep branch of the medial femoral circumflex artery, the external rotators and the capsule...
April 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28513472/experimental-and-numerical-studies-of-beetle-inspired-flapping-wing-in-hovering-flight
#3
Tien Van Truong, Tuyen Quang Le, Hoon Cheol Park, Doyoung Byun
In this paper, we measure unsteady forces and visualize 3D vortices around a beetle-like flapping wing model in hovering flight by experiment and numerical simulation. The measurement of unsteady forces and flow patterns around the wing were conducted using a dynamically scaled wing model in the mineral-oil tank. The wing kinematics were directly derived from the experiment of a real beetle. The 3D flow structures of the flapping wing were captured by using air bubble visualization while forces were measured by a sensor attached at the wing base...
May 17, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28506450/utility-and-versatility-of-the-supraclavicular-artery-island-flap-in-head-and-neck-reconstruction
#4
José A González-García, Carlos M Chiesa-Estomba, Jon A Sistiaga, Ekhiñe Larruscain, Leire Álvarez, Xabier Altuna
INTRODUCTION: The supraclavicular island flap is a rotational pedicled flap and may have some advantages in head and neck reconstruction compared with free-tissue transfer when this kind of reconstruction is not affordable or recommended. MATERIAL AND METHODS: We present our experience during the year 2016 in the application of the supraclavicular island flap in five cases as an alternative to microvascular reconstruction in several defects after resection of head and neck tumours...
May 12, 2017: Acta Otorrinolaringológica Española
https://www.readbyqxmd.com/read/28496983/correlated-velocity-models-as-a-fundamental-unit-of-animal-movement-synthesis-and-applications
#5
Eliezer Gurarie, Christen H Fleming, William F Fagan, Kristin L Laidre, Jesús Hernández-Pliego, Otso Ovaskainen
BACKGROUND: Continuous time movement models resolve many of the problems with scaling, sampling, and interpretation that affect discrete movement models. They can, however, be challenging to estimate, have been presented in inconsistent ways, and are not widely used. METHODS: We review the literature on integrated Ornstein-Uhlenbeck velocity models and propose four fundamental correlated velocity movement models (CVM's): random, advective, rotational, and rotational-advective...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28490406/closure-of-nasal-septal-perforations-with-a-polydioxanone-plate-and-temporoparietal-fascia-in-a-closed-approach
#6
Lorenz Epprecht, Christoph Schlegel, David Holzmann, Michael Soyka, Thomas Kaufmann
BACKGROUND: Septal perforation closure is still often invasive and complex, with relatively low closure rates. OBJECTIVES: We aimed to provide the first results of a case series of 20 patients with nasal septal perforations who underwent septal perforation repair by both an open and a minimally invasive technique by using a graft that consisted of temporoparietal fascia and a polydioxanone (PDS) plate without mucosal flaps. Between 2014 and 2016, we tested, for the first time, the feasibility of the insertion of this graft via a hemitransfixion incision at our institution...
May 1, 2017: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/28468193/removal-of-an-unusual-neglected-foreign-body-in-infratemporal-region-using-navigation
#7
Avani Jain, Gaurav Gupta, Mohnish Grover
A 19-year-old male presented with complaint of a bluish mass in the hard palate since 3 months. The patient had a history of trauma 8 years back in the left zygomatic area with a pen. It was lodged in the wound and removed at that time. Computed tomography scan was revealed a linear heterogenous dense structure extending from left infratemporal fossa to oral cavity, traversing through left maxillary sinus, with bone defect seen in lateral and medial wall of maxilla, and in the hard palate, most likely a neglected foreign body...
May 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28466362/treatment-of-implant-exposure-due-to-skin-necroses-after-skin-sparing-mastectomy-initial-experiences-using-a-not-selective-random-epigastric-flap
#8
Estíbaliz Echazarreta-Gallego, Guillermo Pola-Bandrés, María Dolores Arribas-Del Amo, Ismael Gil-Romea, Ramón Sousa-Domínguez, Antonio Güemes-Sánchez
Breast prostheses exposure is probably the most devastating complication after a skin sparing mastectomy (SSM) and implant-based, one-stage, breast reconstruction. This complication may occur in the immediate post-operative period or in the weeks and even months after the procedure. In most cases, the cause is poor skin coverage of the implant due to skin necrosis. PATIENTS AND METHODS: Eight consecutive cases of implant exposure (or risk of exposure) due to skin necrosis in SSM patients over a period of 5 years, all patients were treated using a random epigastric rotation flap, executed by the same medical team...
May 2, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28463224/wing-wake-interaction-destabilizes-hover-equilibrium-of-a-flapping-insect-scale-wing
#9
James Bluman, Chang-Kwon Kang
Wing-wake interaction is a characteristic nonlinear flow feature that can enhance the unsteady lift in flapping flight. However, the effects of wing-wake interaction on the flight dynamics of hover are inadequately understood. We use a well-validated two-dimensional Navier-Stokes equation solver and a quasi-steady model to investigate the role of wing-wake interaction on the hover stability of a fruit fly scale flapping flyer. The Navier-Stokes equations capture the wing-wake interaction, whereas the quasi-steady models do not...
May 2, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28460375/experimental-evidence-that-thrust-earthquake-ruptures-might-open-faults
#10
Vahe Gabuchian, Ares J Rosakis, Harsha S Bhat, Raúl Madariaga, Hiroo Kanamori
Many of Earth's great earthquakes occur on thrust faults. These earthquakes predominantly occur within subduction zones, such as the 2011 moment magnitude 9.0 eathquake in Tohoku-Oki, Japan, or along large collision zones, such as the 1999 moment magnitude 7.7 earthquake in Chi-Chi, Taiwan. Notably, these two earthquakes had a maximum slip that was very close to the surface. This contributed to the destructive tsunami that occurred during the Tohoku-Oki event and to the large amount of structural damage caused by the Chi-Chi event...
May 1, 2017: Nature
https://www.readbyqxmd.com/read/28460192/proton-density-fat-fraction-of-rotator-cuff-muscles-is-associated-with-isometric-strength-10-years-after-rotator-cuff-repair-a-quantitative-magnetic-resonance-imaging-study-of-the-shoulder
#11
Dimitrios C Karampinos, Christian Holwein, Stefan Buchmann, Thomas Baum, Stefan Ruschke, Alexandra S Gersing, Reto Sutter, Andreas B Imhoff, Ernst J Rummeny, Pia M Jungmann
BACKGROUND: Quantitative muscle fat-fraction magnetic resonance (MR) imaging techniques correlate with semiquantitative Goutallier scores with failure after rotator cuff (RC) repair. PURPOSE: To investigate the relationship of proton density fat fraction (PDFF) of the RC muscles with semiquantitative MR scores, cartilage T2 relaxation times, and clinical isometric strength measurements in patients 10 years after unilateral RC repair. STUDY DESIGN: Cross-sectional study; Level of evidence, 3...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28458964/free-style-deepithelialized-propeller-flaps-an-ideal-local-flap-to-obliterate-wounds-with-dead-space
#12
Asli Datli, HyunSuk Suh, Young Chul Kim, Doon Hoon Choi, Joon Pio Jp Hong
BACKGROUND: The reconstruction of the posterior trunk, especially with large dead spaces, remains challenging. Regional muscle flaps may lack adequate volume and reach. The purpose of this report was to evaluate the efficacy of deepithelialized free-style perforator-based propeller flaps to obliterate defects with large dead space. METHODS: A total of 7 patients with defects on the posterior trunk with large dead spaces were evaluated. After complete debridement or resection, all flaps were designed on a single perforator adjacent to the defect, deepithelialized, and then rotated in a propeller fashion...
March 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28458961/improving-pressure-ulcer-reconstruction-our-protocol-and-the-cop-cone-of-pressure-flap
#13
Francesco Gargano, Lee Edstrom, Karen Szymanski, Scott Schmidt, Jack Bevivino, Richard Zienowicz, Jennifer Stark, Helena O Taylor, Silvio Podda, Paul Liu
BACKGROUND: Surgical treatment of pressure ulcers is challenging for high recurrence rates. Deepithelialized flaps have been used previously with the aim to eliminate shearing forces and the cone of pressure (COP) effect. The goal of this study is to adopt a standardized protocol and evaluate if 2 different flap techniques affect outcomes. METHODS: The novel COP flap is illustrated. Twenty patients were prospectively treated with flap coverage over a 36-month period...
March 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28458820/covering-of-an-exposed-vascular-graft-in-the-groin-with-an-external-oblique-muscle-rotational-flap
#14
Bastiaan P Vierhout, Jeroen M Smit, Clark J Zeebregts
Abdominal muscles, such as the oblique- and transverse muscles, find their blood supply from multiple segmental pedicles from the iliac artery. Besides its superior vascularization, its release is simple, leaving two abdominal muscles for securing abdominal wall strength. The release of the muscle and coverage of the graft requires partial muscle mobilization and is a minor reconstruction, but extension of the mobilization cranially enables coverage of larger defects. We present a case of an infected vascular graft in the groin successfully preserved through coverage with an external oblique muscle flap...
February 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28448311/surgical-techniques-for-closure-of-a-scalp-defect-after-resection-of-skin-malignancy
#15
Maciej Rysz, Dariusz Grzelecki, Maciej Mazurek, Stanisław Starościak, Romuald Krajewski
BACKGROUND: Surgery for scalp malignancies is aimed at the complete resection and a good aesthetic outcome. The goal was to develop an algorithm for scalp reconstruction based on the authors' surgical experience. METHODS: This is a retrospective analysis of 123 procedures of scalp malignancies in 105 patients. Twenty eight procedures were for resection of squamous cell carcinoma, 54 for basal cell carcinoma, and 41 for suspected melanomas. RESULTS: Primary closure (27 procedures), local flap (LF; 19), split-thickness skin graft (SG; 64), rotated LF and SG (9), and free vascularized flaps (4) were used...
April 12, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28445200/the-nasal-tip-rotation-flap-for-reconstruction-of-the-lateral-nasal-tip-anterior-ala-and-soft-triangle-the-authors-experience-with-55-patients
#16
Anastasia Benoit, S Tyler Hollmig, Brian C Leach
BACKGROUND: Defects of the lateral nasal tip, anterior ala, and soft triangle subunits lack reconstructive options that are consistently satisfactory. For such defects, the novel anterior-based nasal tip rotation flap provides functional and aesthetic results in a single operative session. OBJECTIVE: To describe the authors' experience with the nasal tip rotation flap, including patient selection and design modifications to enhance aesthetic success. METHODS: An IRB-approved retrospective database review of nasal tip rotation flap repairs was performed at the Medical University of South Carolina and Stanford University Medical Center...
April 24, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28441303/surgical-techniques-for-closure-of-a-scalp-defect-after-resection-of-skin-malignancy
#17
Maciej Rysz, Dariusz Grzelecki, Maciej Mazurek, Stanisław Starościak, Romuald Krajewski
BACKGROUND: Surgery for scalp malignancies is aimed at the complete resection and a good aesthetic outcome. The goal was to develop an algorithm for scalp reconstruction based on the authors' surgical experience. METHODS: This is a retrospective analysis of 123 procedures of scalp malignancies in 105 patients. Twenty eight procedures were for resection of squamous cell carcinoma, 54 for basal cell carcinoma, and 41 for suspected melanomas. RESULTS: Primary closure (27 procedures), local flap (LF; 19), split-thickness skin graft (SG; 64), rotated LF and SG (9), and free vascularized flaps (4) were used...
May 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28425594/trilobed-pedicled-superior-gluteal-artery-perforator-flap-for-lumbosacral-defect-coverage
#18
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
#19
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...
May 9, 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
#20
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
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