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Septal reconstruction

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https://www.readbyqxmd.com/read/29907933/the-effect-of-time-of-flight-and-point-spread-function-modeling-on-82-rb-myocardial-perfusion-imaging-of-obese-patients
#1
Paul K R Dasari, Judson P Jones, Michael E Casey, Yuanyuan Liang, Vasken Dilsizian, Mark F Smith
BACKGROUND: The effect of time-of-flight (TOF) and point spread function (PSF) modeling in image reconstruction has not been well studied for cardiac PET. This study assesses their separate and combined influence on 82 Rb myocardial perfusion imaging in obese patients. METHODS: Thirty-six obese patients underwent rest-stress 82 Rb cardiac PET. Images were reconstructed with and without TOF and PSF modeling. Perfusion was quantitatively compared using the AHA 17-segment model for patients grouped by BMI, cross-sectional body area in the scanner field of view, gender, and left ventricular myocardial volume...
June 15, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29897667/transcatheter-closure-of-a-sinus-venosus-atrial-septal-defect-using-3d-printing-and-image-fusion-guidance
#2
Akanksha N Thakkar, Ponraj Chinnadurai, John P Breinholt, C Huie Lin
A 63-year-old man with cirrhosis, hepatocellular carcinoma, and coagulopathy was diagnosed with a sinus venosus atrial septal defect (ASD) and partial anomalous pulmonary venous return (PAPVR) of the right upper pulmonary vein (RUPV). Transcatheter repair by positioning a stent graft in the superior vena cava was planned. Based on three-dimensional (3D) reconstruction of gated cardiac CTA, a 28 mm × 7 cm Endurant II® aortic extension stent graft (Medtronic, MN) was chosen. A 3D model printed from the CTA was used to simulate device deployment, demonstrating successful exclusion of the sinus venosus ASD with return of the RUPV to the left atrium (LA)...
June 13, 2018: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29897435/mitral-valve-posterior-leaflet-reconstruction-using-extracellular-matrix-an-acute-porcine-study
#3
Marcell J Tjørnild, Søren N Skov, Karen B Poulsen, Mona Sharghbin, Leila L Benhassen, Lisa Carlson Hanse, Farhad Waziri, Diana M Røpcke, Sten L Nielsen, J Michael Hasenkam
OBJECTIVES: To investigate mitral valve posterior leaflet and subvalvular reconstruction using a 2-ply small intestinal submucosal extracellular matrix sheet. METHODS: Mitral valve posterior leaflet and subvalvular reconstruction was characterized in an acute 80-kg porcine model with 7 pigs acting as their own controls. The characterization was based on pressure catheter measurements of pressure differences to identify mitral regurgitation, stenosis and systolic anterior motion...
April 19, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29886664/-the-experience-of-surgical-treatment-for-ebstein-anomaly-in-141-children
#4
X F Yu, L S Qiu, J F Liu, X Liu, H F Hong
Objective: To explore the surgical strategy for Ebstein anomaly in children. Methods: From January 2003 to December 2015, a total of 141 cases of Ebstein anomaly were treated at Department of Pediatric Cardiothoracic Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiaotong University. There were 65 male and 76 female patients, with age of (6.9±1.6) years (ranging from 10 months to 15 years), weight of (19.6±4.7) kg (ranging from 6.5 to 59.0 kg). All patients were diagnosed by 2 dimensional Doppler echocardiography and the septal leaflet and posterior leaflet displaced downward from 1...
June 1, 2018: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29878990/use-of-roof-shaped-costochondral-cartilage-for-correction-of-saddle-nose-deformity
#5
Fatih Irmak, Sevgi K Yazar, Selami S Sirvan, Memet Yazar, Semra Karsidag
BACKGROUND: Cartilage grafts are routinely used in secondary and post-traumatic rhinoplasty. However, in most cases, there are weak areas in the nasal bones and upper lateral cartilages. The purpose of this study was to seek a solution for keystone area and dorsum of the nose in revision and post-traumatic rhinoplasty cases, and reconstruction of saddle nose deformity including upper lateral cartilage with roof shaped graft. METHODS: A retrospective review of reconstructive rhinoplasties performed for saddle nose deformities was conducted...
March 26, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29797230/geometry-of-the-left-ventricular-outflow-tract-assessed-by-3d-tee-in-patients-with-aortic-stenosis-impact-of-upper-septal-hypertrophy-on-measurements-of-doppler-derived-left-ventricular-stroke-volume
#6
Dan Koto, Masaki Izumo, Takafumi Machida, Kengo Suzuki, Kihei Yoneyama, Tomomi Suzuki, Ryo Kamijima, Yasuyuki Kobayashi, Tomoo Harada, Yoshihiro J Akashi
BACKGROUND: It is unclear how upper septal hypertrophy (USH) affects Doppler-derived left ventricular stroke volume (SV) in patients with AS. The aims of this study were to: (1) validate the accuracy of 3D transesophageal echocardiography (TEE) measurements of the left ventricular outflow tract (LVOT), (2) evaluate the differences in LVOT geometry between AS patients with and without USH, and (3) assess the impact of USH on measurement of SV. METHODS: In protocol 1, both 3D TEE and multi-detector computed tomography were performed in 20 patients with AS [aortic valve area (AVA) ≤ 1...
May 24, 2018: Journal of Echocardiography
https://www.readbyqxmd.com/read/29794710/discussion-acellular-human-dermal-allograft-as-a-graft-for-nasal-septal-perforation-reconstruction
#7
Russell W H Kridel, Sean W Delaney
No abstract text is available yet for this article.
June 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29783986/impact-of-the-cone-operation-on-left-ventricular-size-function-and-dyssynchrony-in-ebstein-anomaly-a-cardiovascular-magnetic-resonance-study
#8
Rebecca S Beroukhim, Linyuan Jing, David M Harrild, Brandon K Fornwalt, Abba Mejia-Spiegeler, Jonathan Rhodes, Sitaram Emani, Andrew J Powell
BACKGROUND: In addition to tricuspid regurgitation (TR) and right ventricular (RV) enlargement, patients with Ebstein anomaly are at risk for left ventricular (LV) dysfunction and dyssynchrony. We studied the impact of the cone tricuspid valve reconstruction operation on LV size, function, and dyssynchrony. METHODS: All Ebstein anomaly patients who had both pre- and postoperative cardiovascular magnetic resonance (CMR) studies were retrospectively identified. From cine images, RV and LV volumes and ejection fractions (EF) were calculated, and LV circumferential and longitudinal strain were measured by feature tracking...
May 21, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29775014/-the-application-of-3d-reconstruction-in-investigating-the-frontal-sinus-drainage-pathway-based-on-computer-tomography-data
#9
Y Liu, X Q Ma, X H Sun, S Dai, J F Zhang, H B Li, X Ma, J Y Wang, Q Dou, J Y Tian, J P Jia
Objective: The aim of this study is to explore the value of 3D reconstruction technology based on computer tomography data in understanding the frontal sinus drainage pathway. Method: Three-dimensional reconstruction of DICOM data from 100 cases of sinus CT was performed by using Mimics 19.0 software. The 3D models were used to study types, the relative locations of frontal sinus and recess cells as well as the influence of the frontal sinus drainage pathway. Result: The 3D model of frontal sinus, frontal recess cells and frontal sinus drainage pathway were reconstructed successfully...
February 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29770201/recent-advances-in-managing-septal-defects-ventricular-septal-defects-and-atrioventricular-septal-defects
#10
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/29749920/evolution-of-the-graded-repair-of-csf-leaks-and-skull-base-defects-in-endonasal-endoscopic-tumor-surgery-trends-in-repair-failure-and-meningitis-rates-in-509-patients
#11
Andrew Conger, Fan Zhao, Xiaowen Wang, Amalia Eisenberg, Chester Griffiths, Felice Esposito, Ricardo L Carrau, Garni Barkhoudarian, Daniel F Kelly
OBJECTIVE The authors previously described a graded approach to skull base repair following endonasal microscopic or endoscope-assisted tumor surgery. In this paper they review their experience with skull base reconstruction in the endoscopic era. METHODS A retrospective review of a single-institution endonasal endoscopic patient database (April 2010-April 2017) was undertaken. Intraoperative CSF leaks were graded based on size (grade 0 [no leak], 1, 2, or 3), and repair technique was documented across grades...
May 11, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29706591/semilunar-conchal-cartilage-graft-in-saddle-nose-reconstruction
#12
I Rašić, A Košec, A Pegan
INTRODUCTION: The saddle nose deformity is easily recognized by the loss of septal support and nasal dorsal height with adverse functional and aesthetic consequences. TECHNIQUE: We treated a 50-year-old woman and a 54-year old man that presented with a moderate saddle nose deformity following a previous septorhinoplasty (female patient) and a posttraumatic severe saddle nose deformity (male patient). The patients were treated by open approach rhinoplasty under general anesthesia, and the saddle nose deformity was reconstructed with a semilunar conchal cartilage graft...
April 26, 2018: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/29704706/a-monte-carlo-study-on-the-performance-evaluation-of-a-parallel-hole-collimator-for-a-hirespect-a-dedicated-small-animal-spect
#13
Samira Abbaspour, Kaveh Tanha, Babak Mahmoudian, Majid Assadi, Jalil Pirayesh Islamian
Collimator geometry has an important contribution on the image quality in SPECT imaging. The purpose of this study was to investigate the effect of parallel hole collimator hole-size on the functional parameters (including the spatial resolution and sensitivity) and the image quality of a HiReSPECT imaging system using SIMIND Monte Carlo program. To find a proper trade-off between the sensitivity and spatial resolution, the collimator with hole diameter ranges of 0.3-1.5 mm (in steps of 0.3 mm) were used with a fixed septal and hole thickness values (0...
April 22, 2018: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29688445/extrapolating-the-limits-of-the-nasoseptal-flap-with-pedicle-dissection-to-the-internal-maxillary-artery
#14
Carlos D Pinheiro-Neto, Maria Peris-Celda, Tyler Kenning
BACKGROUND: The nasoseptal flap is the main pedicled flap used for endoscopic cranial base reconstruction. For large anterior cranial base defects, the anterior edge is a concern for the nasoseptal flap reach. OBJECTIVE: To present a surgical technique that completely releases the vascular pedicle of the nasoseptal flap from the sphenopalatine artery (SPA) foramen improving considerably the reach of the flap. METHODS: A patient with left anterior cranial base fracture involving the posterior table of the frontal sinus, who presented with cerebrospinal fluid leak and contused brain herniation to the ethmoid and frontal sinuses...
April 24, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29663193/finite-element-analysis-of-tricuspid-valve-deformation-from-multi-slice-computed-tomography-images
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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