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Vascular reconstruction

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https://www.readbyqxmd.com/read/29776725/collaterals-management-during-pancreatoduodenectomy-in-patients-with-celiac-axis-stenosis-a-systematic-review-of-the-literature
#1
REVIEW
Francesco Giovanardi, Quirino Lai, Manuela Garofalo, Gabriela A Arroyo Murillo, Eleonore Choppin de Janvry, Redan Hassan, Zoe Larghi Laureiro, Adriano Consolo, Fabio Melandro, Pasquale B Berloco
BACKGROUND/OBJECTIVES: Celiac axis stenosis (CAS) represents an uncommon and typically innocuous condition. However, when a pancreatic resection is required, a high risk for upper abdominal organs ischemia is observed. In presence of collaterals, such a risk is minimized if their preservation is realized. The aim of the present study is to systematically review the literature with the intent to address the routine management of collateral arteries in the case of CAS patients requiring pancreatoduodenectomy...
May 15, 2018: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/29775982/the-supraclavicular-artery-perforator-flap-a-comparative-study-of-imaging-techniques-used-in-preoperative-mapping
#2
Hemin Oathman Sheriff, Kawa Abdullah Mahmood, Nzar Hamawandi, Aram Jamal Mirza, Jawad Hawas, Esther Granell Moreno, Juan Antonio Clavero, Christopher Hankins, Jaume Masia
BACKGROUND:  The supraclavicular artery flap is an excellent flap for head and neck reconstruction. The aim of this study is to assess imaging techniques to define the precise vascular boundaries of this flap. METHODS:  Six imaging techniques were used for supraclavicular artery mapping in 65 cases; handheld Doppler, triplex ultrasound, computed tomography angiography, magnetic resonance angiography, digital subtraction angiography, and indocyanine green angiography...
May 18, 2018: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/29772400/neuro-endoscope-for-skull-base-tumors
#3
REVIEW
Hua Gao, Chunhui Liu, Yazhuo Zhang
The endoscope has traditionally been used in neurosurgery to access a lesion within a natural body cavity. The challenge has been to access and resect deep-seated intraparenchymal lesions using a minimally invasive endoscopic technique. Endoscopic endonasal trans-sphenoidal surgery has gained increasing acceptance by otolaryngologists and neurosurgeons. Surgical procedures of the skull base include exposure, resection, and base reconstruction. These approaches start at the sphenoid sinus, which provides a reference point to important vascular and neural structures...
May 14, 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29770201/recent-advances-in-managing-septal-defects-ventricular-septal-defects-and-atrioventricular-septal-defects
#4
REVIEW
P Syamasundar Rao, Andrea D Harris
This review discusses the management of ventricular septal defects (VSDs) and atrioventricular septal defects (AVSDs). There are several types of VSDs: perimembranous, supracristal, atrioventricular septal, and muscular. The indications for closure are moderate to large VSDs with enlarged left atrium and left ventricle or elevated pulmonary artery pressure (or both) and a pulmonary-to-systemic flow ratio greater than 2:1. Surgical closure is recommended for large perimembranous VSDs, supracristal VSDs, and VSDs with aortic valve prolapse...
2018: F1000Research
https://www.readbyqxmd.com/read/29768632/lower-extremity-limb-salvage-with-cross-leg-pedicle-flap-cross-leg-free-flap-and-cross-leg-vascular-cable-bridge-flap
#5
Oscar J Manrique, Sarah N Bishop, Pedro Ciudad, Kian Adabi, Jorys Martinez-Jorge, Steven L Moran, Tony Huang, Aparna Vijayasekaran, Shih-Heng Chen, Hung-Chi Chen
BACKGROUND:  Lower extremity salvage following significant soft tissue loss can be complicated by lack of recipient vessel for free tissue transfer. We describe our experience in lower limb salvage for patients with no recipient vessels with the use of pedicle, free and cable bridge flaps. METHODS:  A retrospective review from 1985 to 2017 of patients undergoing lower limb salvage using a contralateral pedicle cross leg (PCL) flaps, free cross leg (FCL) flaps, or free cable bridge (FCB) flaps was conducted...
May 16, 2018: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/29763966/quantitative-analysis-of-thyroid-tumors-vascularity-a-comparison-between-3-d-contrast-enhanced-ultrasound-and-3-d-power-doppler-on-benign-and-malignant-thyroid-nodules
#6
Cristina Caresio, Marco Caballo, Maurilio Deandrea, Roberto Garberoglio, Alberto Mormile, Ruth Rossetto, Paolo Limone, Filippo Molinari
PURPOSE: To perform a comparative quantitative analysis of Power Doppler ultrasound (PDUS) and Contrast-Enhancement ultrasound (CEUS) for the quantification of thyroid nodules vascularity patterns, with the goal of identifying biomarkers correlated to the malignancy of the nodule with both imaging techniques. METHODS: We propose a novel method to reconstruct the vascular architecture from 3-D PDUS and CEUS images of thyroid nodules, and to automatically extract seven quantitative features related to the morphology and distribution of vascular network...
May 15, 2018: Medical Physics
https://www.readbyqxmd.com/read/29761514/mandibular-reconstruction-in-elderly-patients
#7
Shimpei Miyamoto, Takuya Higashino, Minoru Sakuraba
BACKGROUND AND OBJECTIVES: The choice of reconstructive technique for a segmental mandibular defect in elderly patients is controversial. The aim of this study was to establish an algorithm for selecting a method of mandibular reconstruction in elderly patients. METHODS: We retrospectively evaluated 121 patients aged ≥65 years who underwent immediate microvascular mandibular reconstruction after oncologic resection. Patients were divided into three groups based on method of reconstruction: vascularized bone graft (n = 49), mandibular reconstruction plate and soft tissue flap (n = 22), and soft-tissue flap (n = 50)...
May 14, 2018: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29761422/computational-pre-surgical-planning-of-arterial-patch-reconstruction-parametric-limits-and-in-vitro-validation
#8
S Samaneh Lashkarinia, Senol Piskin, Tijen A Bozkaya, Ece Salihoglu, Can Yerebakan, Kerem Pekkan
Surgical treatment of congenital heart disease (CHD) involves complex vascular reconstructions utilizing artificial and native surgical materials. A successful surgical reconstruction achieves an optimal hemodynamic profile through the graft in spite of the complex post-operative vessel growth pattern and the altered pressure loading. This paper proposes a new in silico patient-specific pre-surgical planning framework for patch reconstruction and investigates its computational feasibility. The proposed protocol is applied to the patch repair of main pulmonary artery (MPA) stenosis in the Tetralogy of Fallot CHD template...
May 14, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29756364/free-jejunal-flap-transfer-with-multiple-vascular-pedicles-for-safe-and-reliable-pharyngoesophageal-reconstruction
#9
Tomoyuki Kurita, Tateki Kubo, Hiroki Tashima, Takashi Fujii
BACKGROUND: In pharyngoesophageal reconstruction, we transferred a long jejunum flap containing multiple pedicles to achieve a 100% flap survival rate, and used the redundant mesentery to cover important tissues and fill in the dead space to reduce common postoperative complications, such as surgical site infections and fistula formation. METHODS: A total of 243 jejunal flap transfers with multiple vascular anastomoses were reviewed to examine flap survival and rates of early postoperative complications, such as surgical site infections and fistula formation, perioperative mortality, and donor site morbidity...
May 13, 2018: Head & Neck
https://www.readbyqxmd.com/read/29754975/endoscopic-endonasal-double-flap-technique-for-reconstruction-of-large-anterior-skull-base-defects-technical-note
#10
Ricardo Landini Lutaif Dolci, Alexandre Bossi Todeschini, Américo Rubens Leite Dos Santos, Paulo Roberto Lazarini
INTRODUCTION: One of the main concerns in endoscopic endonasal approaches to the skull base has been the high incidence and morbidity associated with cerebrospinal fluid leaks. The introduction and routine use of vascularized flaps allowed a marked decrease in this complication followed by a great expansion in the indications and techniques used in endoscopic endonasal approaches, extending to defects from huge tumours and previously inaccessible areas of the skull base. OBJECTIVE: Describe the technique of performing endoscopic double flap multi-layered reconstruction of the anterior skull base without craniotomy...
April 19, 2018: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/29754149/the-role-of-dipyrone-in-the-high-development-of-on-treatment-platelet-reactivity-in-acetylsalicylic-acid-treated-patients-undergoing-peripheral-artery-revascularization
#11
Jan Hartinger, Robert Novotny, Jana Bilkova, Tomas Kvasnicka, Petr Mitas, Martin Sima, Jaroslav Hlubocky, Jan Kvasnicka, Ondrej Slanar, Jaroslav Lindner
OBJECTIVE: To evaluate the effects of dipyrone on sensitivity to Aspirin [acetyl salicylic acid, (ASA)] in patients who underwent peripheral artery vascular reconstruction. SUBJECTS AND METHODS: Impedance aggregometry and light transmission aggregometry were used to determine the effects of dipyrone on ASA treatment in 21 patients. Blood samples were drawn in a 7-day period after the surgery. The cut-off value for high on-treatment platelet reactivity (HTPR) was set at < 65% of aggregation inhibition for impedance aggregometry...
May 13, 2018: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/29749440/vitamin-k%C3%A2-dependent-proteins-involved-in-bone-and-cardiovascular-health-review
#12
Lianpu Wen, Jiepeng Chen, Lili Duan, Shuzhuang Li
In postmenopausal women and elderly men, bone density decreases with age and vascular calcification is aggravated. This condition is closely associated with vitamin K2 deficiency. A total of 17 different vitamin K‑dependent proteins have been identified to date. Vitamin K‑dependent proteins are located within the bone, heart and blood vessels. For instance, carboxylated osteocalcin is beneficial for bone and aids the deposition of calcium into the bone matrix. Carboxylated matrix Gla protein effectively protects blood vessels and may prevent calcification within the vascular wall...
April 27, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29747901/use-of-a-microvascular-coupler-device-for-end-to-side-venous-anastomosis-in-oral-and-maxillofacial-reconstruction
#13
W-M Wang, L Huang, X Gao, Y-X Yuan, X-Q Chen, X-C Jian
The aim of this study was to compare the use of a microvascular coupler device (MCD) for end-to-side venous anastomosis (ETS group) and phleboplasties combined with MCD for end-to-end venous anastomosis (ETE group) in free tissue transfer for oral and maxillofacial reconstruction, with regard to the anastomosis time and occurrence of postoperative vascular crisis. The ETS group included 22 patients and the ETE group included 40 patients. Patient demographic data, anastomotic time, coupler size, microvascular complications, and flap survival rates were collected and analyzed...
May 7, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29747829/local-low-shear-stress-and-endothelial-dysfunction-in-patients-with-nonobstructive-coronary-atherosclerosis
#14
Gerasimos Siasos, Jaskanwal D Sara, Marina Zaromytidou, Kyoung H Park, Ahmet Umit Coskun, Lilach O Lerman, Evangelos Oikonomou, Charles C Maynard, Dimitris Fotiadis, Kostas Stefanou, Michail Papafaklis, Lampros Michalis, Charles Feldman, Amir Lerman, Peter H Stone
BACKGROUND: Local hemodynamic factors are important determinants of atherosclerotic plaque development and progression. OBJECTIVES: The goal of this study was to determine the association between low endothelial shear stress (ESS) and microvascular and epicardial endothelial dysfunction in patients with early atherosclerosis. METHODS: Sixty-five patients (mean age 52 ± 11 years) with nonobstructive coronary atherosclerosis (luminal diameter stenosis <30%) were included...
May 15, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29747815/gangliosides-in-diabetic-wound-healing
#15
Duncan Hieu M Dam, Amy S Paller
An organized series of complicated biological and molecular phenomena is required for normal skin wound healing. These processes depend on normal cellular responses to cytokines, growth factors, and other mediators, such as clotting factors, prostaglandins, free radicals, and nitric oxide. In diabetic ulcers, impaired responses to these molecules lead to abnormalities in vascularization, innervation, matrix reconstruction, and reepithelialization of wounds. keratinocyte migration and proliferation on an extracellular matrix is critical in reepithelialization, but the response to growth factors is blunted in diabetes, including the insulin/IGF-1signaling axis...
2018: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/29746324/extracorporeal-perfusion-in-vascularized-composite-allotransplantation-current-concepts-and-future-prospects
#16
Maximilian Kueckelhaus, Flemming Puscz, Alexander Dermietzel, Mehran Dadras, Sebastian Fischer, Nicco Krezdorn, Bohdan Pomahac, Tobias Hirsch
Severe injuries of the face and limbs remain a major challenge in today's reconstructive surgery. Vascularized composite allotransplantation (VCA) has emerged as a promising approach to restore these defects. Yet, there are major obstacles preventing VCA from broad clinical application. Two key restrictions are (1) the graft's limited possible ischemia time, keeping the potential donor radius extremely small, and (2) the graft's immunogenicity, making extensive lifelong monitoring and immunosuppressive treatment mandatory...
June 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29746278/computed-tomographic-angiography-used-for-localization-of-the-cutaneous-perforators-and-selection-of-anterolateral-thigh-flap-bail-out-branches
#17
Anna K Steve, Colin P White, Ali Alkhawaji, Thomas E J Hayakawa, Edward W Buchel, Steven F Morris
BACKGROUND: The purpose of this study was to evaluate the territory supplied by the lateral circumflex femoral artery for the consistency of a proximal perforator that could be used as an alternative pedicle for the anterolateral thigh flap if a tedious intramuscular course is encountered during elevation of the perforator used to develop the initial surgical plan. It is hypothesized that a consistent "bail-out" perforator supplying the proximal thigh would facilitate a simpler anterolateral thigh flap harvest, with minimal modification to flap design...
April 30, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29746277/skin-paddles-improve-muscle-flap-salvage-rates-after-microvascular-compromise-in-lower-extremity-reconstruction
#18
John T Stranix, Adam Jacoby, Z-Hye Lee, Lavinia Anzai, Pierre B Saadeh, Vishal Thanik, Jamie P Levine
PURPOSE: Free tissue transfer after lower extremity trauma is associated with notoriously high complication rates. Theoretically, the inclusion of a cutaneous paddle on muscle free flaps may improve clinical flap monitoring. The effect of skin paddle presence on muscle free flap salvage outcomes after take-back was examined. METHODS: Retrospective query of our institutional free-flap registry (1979-2016) identified 362 muscle-based flaps performed for soft tissue coverage after below-knee trauma...
April 30, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29745539/-endothelial-injury-and-its-repair-strategies-after-intravascular-stents-implantation
#19
REVIEW
Yadong Xi, Yuhua Huang, Ruolin Du, Yazhou Wang, Guixue Wang, Tieying Yin
Coronary atherosclerotic heart disease is a serious threat to human life and health. In recent years, the main treatment for it is to implant the intravascular stent into the lesion to support blood vessels and reconstruct blood supply. However, a large number of experimental results showed that mechanical injury and anti-proliferative drugs caused great damage after stent implantation, and increased in-stent restenosis and late thrombosis risk. Thus, maintaining the integrity and normal function of the endothelium can significantly reduce the rate of thrombosis and restenosis...
April 1, 2018: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29744887/retinal-vascular-segmentation-using-superpixel-based-line-operator-and-its-application-to-vascular-topology-estimation
#20
Tong Na, Jianyang Xie, Yitian Zhao, Yifan Zhao, Yue Liu, Yongtian Wang, Jiang Liu
PURPOSE: Automatic methods of analyzing of retinal vascular networks, such as retinal blood vessel detection, vascular network topology estimation, and arteries / veins classification are of great assistance to the ophthalmologist in terms of diagnosis and treatment of a wide spectrum of diseases. METHODS: We propose a new framework for precisely segmenting retinal vasculatures, constructing retinal vascular network topology, and separating the arteries and veins...
May 9, 2018: Medical Physics
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