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https://www.readbyqxmd.com/read/29663193/finite-element-analysis-of-tricuspid-valve-deformation-from-multi-slice-computed-tomography-images
#1
Fanwei Kong, Thuy Pham, Caitlin Martin, Raymond McKay, Charles Primiano, Sabet Hashim, Susheel Kodali, Wei Sun
Despite the growing clinical interest in the tricuspid valve (TV), there is an incomplete understanding of TV biomechanics which is important in normal TV function and successful TV repair techniques. Computational models with patient-specific human TV geometries can provide a quantitative understanding of TV biomechanic. Therefore, this study aimed to develop finite element (FE) models of human TVs from multi-slice computed tomography (MSCT) images to investigate chordal forces and leaflet stresses and strains...
April 16, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29657707/abdominal-tattoo-can-be-useful-to-avoid-a-midline-abdominal-incision
#2
Jose' F Velasquez, Gisella Nele, Salvatore Giordano
We report a case in which abdominal tattoo margins were modified and used to hide the surgical incision for desmoid tumour removal. Our patient is a 37-year-old female with history remarkable for atrial septal defect closure at the age of ten, but not for previous abdominal surgeries or trauma. A desmoid tumour diagnosis was made upon needle biopsy of the 5 × 4 cm2 mass confined to the rectus abdominis. Subsequently, tumour was resected with an incision through the tattoo upper margin and abdominal wall was reconstructed with primary fascial closure mesh reinforced...
April 2018: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/29643812/left-ventricular-wall-stress-is-sensitive-marker-of-hypertrophic-cardiomyopathy-with-preserved-ejection-fraction
#3
Xiaodan Zhao, Ru-San Tan, Hak-Chiaw Tang, Soo-Kng Teo, Yi Su, Min Wan, Shuang Leng, Jun-Mei Zhang, John Allen, Ghassan S Kassab, Liang Zhong
Hypertrophic cardiomyopathy (HCM) patients present altered myocardial mechanics due to the hypertrophied ventricular wall and are typically diagnosed by the increase in myocardium wall thickness. This study aimed to quantify regional left ventricular (LV) shape, wall stress and deformation from cardiac magnetic resonance (MR) images in HCM patients and controls, in order to establish superior measures to differentiate HCM from controls. A total of 19 HCM patients and 19 controls underwent cardiac MR scans. The acquired MR images were used to reconstruct 3D LV geometrical models and compute the regional parameters (i...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29618857/three-component-cartilage-framework-reconstruction-for-correction-of-post-traumatic-nasal-septal-collapse
#4
Uday Bhat, Tarush Gupta, Mahesh Nair, Mayur Mantri, Mangesh Pawar, Amresh Baliarsing
Background: Post-traumatic nasal septal collapse results in flat, broad, non-projecting nose due to mid-vault collapse. These patients may have airway obstruction due to poorly supported internal valve. Traditional techniques like 'cantilever graft technique' or conventional 'L-graft technique' produce a rigid lobule as the single unit framework extends to the tip. These grafts also lack in internal valve support. Materials and Methods: Twelve patients with post-traumatic nasal septal collapse were treated with three component cartilage framework technique in the past 3 years...
September 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/29617919/combined-nasoseptal-and-inferior-turbinate-flap-for-reconstruction-of-large-skull-base-defect-after-expanded-endonasal-approach-operative-technique
#5
Julien Boetto, Moujahed Labidi, Kentaro Watanabe, Shunya Hanakita, Schahrazed Bouazza, Thibault Passeri, Anne-Laure Bernat, Sebastien Froelich
BACKROUND: Increasing indications for endoscopic endonasal approaches have led neurosurgeons to develop new reconstruction techniques for larger skull base defects. Vascularized grafts have been a great adjunction to reduce the rate of cerebrospinal fluid leak and can also be used to cover exposed critical structures such as the internal carotid artery. The nasoseptal flap and the inferior or middle turbinate flap are thus widely used in endoscopic skull base surgery, but may be insufficient for very large defects...
March 29, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29607143/early-and-mid-term-follow-up-of-patients-receiving-arterial-switch-operation-a-single-center-experience
#6
Yaqiong Xiao, Ping Zhang, Wei Su, Nianguo Dong
Background: The arterial switch operation (ASO) has become the preferred method for surgical correction of transposition of the great arteries (TGA) and Taussig-Bing anomaly. This study was aimed to analysis the early and mid-term results of patients receiving ASO for TGA and Taussig-Bing anomaly in our institute. Methods: A single-institution retrospective study was conducted to assess cardiovascular outcomes after ASO between January 2007 and December 2013. A total of 119 consecutive patients were included in this study...
February 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29602262/false-lumen-intervention-to-promote-remodelling-and-thrombosis-the-flirt-concept-in-aortic-dissection
#7
Xun Yuan, Andreas Mitsis, Thomas Semple, Mireya Castro Verdes, Esther Cambronero-Cortinas, Yida Tang, Christoph A Nienaber
OBJECTIVE: Thoracic endovascular aortic repair (TEVAR) has changed the management of aortic dissection by induced remodelling. Beyond reconstructing the true lumen, we describe the concept of False Lumen Intervention to promote Remodelling and Thrombosis (FLIRT) in both type A and B aortic dissection. METHODS: Between 2011 and 2017, 10 patients with aortic dissection (5 type A; 5 type B) underwent FLIRT using a combination of patent foramen ovale (PFO) or atrial septal defect (ASD) occluders, coils and glue...
March 30, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29590404/intraoperative-customized-double-patch-device-with-twin-sutures-for-multiple-muscular-septal-defects
#8
Gananjay G Salve, Shreepal A Jain, Bharti Sharma, Manglesh S Nimbalkar, Sandip S Katkade, Jeril Kurien, Nilesh S Bhadane, Bharat V Dalvi, Raman Krishna Kumar, Krishnanaik Shivaprakash
OBJECTIVES: Closure of multiple muscular ventricular septal defects (VSDs) remains a challenge because of anatomical complexity. METHODS: We mapped all the VSDs using en face reconstruction of the right ventricular septal surface through echocardiography and then performed an 'Intraoperative Customized Double-Patch Device' technique to surgically close them in 39 patients (male:female = 25:14). The median age of the patients was 6 months (2 months-10 years), and mean weight was 5...
March 26, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29588890/endoscopic-transsphenoidal-salvage-surgery-for-symptomatic-residual-cystic-craniopharyngioma-after-radiotherapy
#9
Enzo Emanuelli, Giuliana Frasson, Diego Cazzador, Daniele Borsetto, Luca Denaro
Objectives  Ideal treatment of craniopharyngiomas is still controversial. Radiotherapy (RT) is considered effective for recurrences or after subtotal tumor removal (STR). About 40 to 50% of patients may experience tumor cyst expansion soon after RT; in these cases, the role of salvage surgery is debated. Design  Operative video. Setting  Tertiary care center. Participants  An 11-year-old boy diagnosed with persistent craniopharyngioma. In 2015, the patient underwent right frontotemporal craniotomy for STR at another center, complicated by panhypopituitarism...
April 2018: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29579028/acellular-human-dermal-allograft-as-a-graft-for-nasal-septal-perforation-reconstruction
#10
Dustin J Conrad, Han Zhang, David Wj Côté
OBJECTIVE: Nasal septal perforations pose a troubling source of morbidity for patients and a difficult problem for the Otolaryngologist. Multiple surgical techniques have been tried with inconsistent success. Prosthetic nasal buttons also have limitations, including patient intolerance and dissatisfaction. Acellular human dermal allograft, AlloDerm™ (LifeCell Branchburg, NJ) has been previously described as an alternative material for septal perforation repair. We aim to demonstrate objective and subjective outcomes, including quantification of patient's symptoms in septal perforation repair with AlloDerm...
March 20, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29572594/blood-pool-and-tissue-phase-patient-motion-effects-on-82-rubidium-pet-myocardial-blood-flow-quantification
#11
Benjamin C Lee, Jonathan B Moody, Alexis Poitrasson-Rivière, Amanda C Melvin, Richard L Weinberg, James R Corbett, Edward P Ficaro, Venkatesh L Murthy
BACKGROUND: Patient motion can lead to misalignment of left ventricular volumes of interest and subsequently inaccurate quantification of myocardial blood flow (MBF) and flow reserve (MFR) from dynamic PET myocardial perfusion images. We aimed to identify the prevalence of patient motion in both blood and tissue phases and analyze the effects of this motion on MBF and MFR estimates. METHODS: We selected 225 consecutive patients that underwent dynamic stress/rest rubidium-82 chloride (82 Rb) PET imaging...
March 23, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29554442/improvement-of-aesthetic-and-nasal-airway-in-patients-with-cleft-lip-nasal-deformities-rhinoplasty-with-septal-cartilage-graft-and-septoplasty
#12
Lei Zhang, Xiaofeng Bai, Zengjian Li, Qiang Liu, Mingliang Yang, Xukai Wang, Li Lu
OBJECTIVE: To assess the improvement of nasal morphologies and ventilation after septal cartilage graft and septoplasty of patients with unilateral cleft lip and palate (UCLP). DESIGN: Retrospective case-control study. SETTING: Tertiary stomatology hospital. PATIENTS: In total, 118 patients with UCLP who had been diagnosed with a secondary nasal deformity and had reconstructive rhinoplasty and/or septoplasty between 2010 and 2015...
April 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29548523/effects-of-nasal-septum-perforation-repair-on-nasal-airflow-an-analysis-using-computational-fluid-dynamics-on-preoperative-and-postoperative-three-dimensional-models
#13
Tsutomu Nomura, Munetaka Ushio, Kenji Kondo, Shigeru Kikuchi
OBJECTIVE: The purpose of this research is to examine the changes in nasal airflow dynamics before and after the nasal perforation repair. METHODS: Three dimensional (3D) models of the nasal cavity before and after septal perforation repair was reconstructed using preoperative and postoperative computed tomography (CT) images of a patient. The numerical simulation was carried out using ANSYS CFX V15.0. Pre- and post-operative models were compared by their velocity, pressure (P), pressure gradient (PG), wall shear (WS), shear strain rate (SSR) and turbulence kinetic energy (TKE) in three plains...
March 13, 2018: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29546557/potential-risk-factors-associated-with-the-development-of-synechiae-following-functional-endoscopic-sinus-surgery
#14
Jamil Manji, Al-Rahim R Habib, Ameen A Amanian, Saad Alsaleh, Andrew Thamboo, Amin R Javer
PURPOSE: Synechiae formation in the middle meatus is the most common complication of functional endoscopic sinus surgery (FESS). Our objectives were to determine the incidence of synechiae occurring in a cohort of patients that have undergone FESS and identify characteristics associated with the development of synechiae postoperatively. METHODS: A retrospective chart review was conducted of CRS patients, with or without nasal polyposis, that had undergone bilateral FESS in the past...
March 15, 2018: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29544416/anesthetic-management-during-surgery-for-tetralogy-of-fallot-with-pulmonary-atresia-and-major-aortopulmonary-collateral-arteries
#15
Zoel A Quinonez, Laura Downey, Rania K Abbasi, Calvin Kuan, Ritu Asija, Doff B McElhinney, Frank L Hanley, Richard D Mainwaring, Lisa Wise-Faberowski
Tetralogy of Fallot with pulmonary atresia and major aortopulmonary collaterals (TOF/PA/MAPCAs) is a heterogeneous disease with varying degrees of severity, requiring complex anesthetic management. Our institution has adopted the approach of early complete repair with incorporation of all lung segments, extensive lobar and branch segmental pulmonary artery reconstruction, and ventricular septal defect closure. While the surgical management of TOF/PA/MAPCAs has been extensively described and varies depending on the institution, there is a paucity of literature on the anesthetic management for such procedures...
March 2018: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/29527390/the-posterior-nasoseptal-flap-a-novel-technique-for-closure-after-endoscopic-transsphenoidal-resection-of-pituitary-adenomas
#16
James Barger, Matthew Siow, Michael Kader, Katherine Phillips, Girish Fatterpekar, David Kleinberg, David Zagzag, Chandranath Sen, John G Golfinos, Richard Lebowitz, Dimitris G Placantonakis
Background: While effective for the repair of large skull base defects, the Hadad-Bassagasteguy nasoseptal flap increases operative time and can result in a several-week period of postoperative crusting during re-mucosalization of the denuded nasal septum. Endoscopic transsphenoidal surgery for pituitary adenoma resection is generally not associated with large dural defects and high-flow cerebrospinal fluid (CSF) leaks requiring extensive reconstruction. Here, we present the posterior nasoseptal flap as a novel technique for closure of skull defects following endoscopic resection of pituitary adenomas...
2018: Surgical Neurology International
https://www.readbyqxmd.com/read/29520463/22q11-2-deletion-status-and-perioperative-outcomes-for-tetralogy-of-fallot-with-pulmonary-atresia-and-multiple-aortopulmonary-collateral-vessels
#17
Laura Mercer-Rosa, Okan U Elci, Nelangi M Pinto, Ronn E Tanel, Elizabeth Goldmuntz
Deletion of 22q11.2 (del22q11) is associated with adverse outcomes in patients with tetralogy of Fallot (TOF). We sought to investigate its contribution to perioperative outcome in patients with a severe form of TOF characterized by pulmonary atresia (PA) or severe pulmonary stenosis (PS) and major aortopulmonary collateral arteries (MAPCAS). We conducted a retrospective review of patients with TOF/MAPCAS who underwent staged surgical reconstruction between 1995 and 2006. Groups were compared according to 22q11...
March 8, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29475764/treatment-of-pediatric-esthesioneuroblastoma-with-smell-preservation
#18
Giandomenico Maggiore, Maria Silvia Lazio, Oreste Gallo
Olfactory neuroblastoma is a rare malignant tumor of neuroectodermal origin and represents the most common cancer of the nasal cavity in pediatric age. The gold standard of treatment consists of en bloc resection, numerous studies have shown as the endoscopic approaches permit good control of the disease improving the quality of life after the treatment. Herein we describe the case of a 13-year-old patient referred to our outpatient clinic with a polypoid multi-lobed lesion occupying the left nasal cavity and imaging that confirmed a left-sided nasal mass without cribriform plate involvement (Kadish B)...
February 20, 2018: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29433140/-colour-duplex-sonography-and-power-duplex-in-perforator-surgery-improvement-of-patients-safety-by-efficient-planning
#19
Adrien Daigeler, Cornelius Schubert, Tobias Hirsch, Björn Behr, Marcus Lehnhardt
INTRODUCTION: There are many techniques to identify vessels in perforator surgery, each with specific disadvantages. Handheld Dopplers are easy to use, but inaccurate with respect to the exact localisation of the perforator. Angio-CT is invasive, time consuming, and expensive. In contrast, duplex sonography is a reliable, easy-to-use and availabe alternative for pre-, intra-, and postoperative visualisation of vessels. Power Doppler further increases sensitivity and allows visualisation of vessels smaller than 0...
February 12, 2018: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/29428174/mid-term-function-and-remodeling-potential-of-tissue-engineered-tricuspid-valve-histology-and-biomechanics
#20
Diana M Ropcke, Jonas Rasmussen, Christine Ilkjær, Søren N Skov, Marcell J Tjørnild, Ulrik T Baandrup, Carl Christian Danielsen, Vibeke E Hjortdal, Sten L Nielsen
OBJECTIVE: Tricuspid valve reconstruction using a small intestinal submucosal porcine extracellular matrix (ECM) tube graft is hypothesized to be durable for six months and show signs of recellularization and growth potential. The purpose was to histologically and biomechanically test ECM valves before and after six months of implantation in pigs for comparison with native valves. METHODS: Ten 60 kg pigs were included, which survived tricuspid valve tube graft insertion...
February 2, 2018: Journal of Biomechanics
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