keyword
MENU ▼
Read by QxMD icon Read
search

Tewfik

keyword
https://www.readbyqxmd.com/read/28634925/technical-efficiency-of-selected-hospitals-in-eastern-ethiopia
#1
Murad Ali, Megersa Debela, Tewfik Bamud
This study examines the relative technical efficiency of 12 hospitals in Eastern Ethiopia. Using six-year-round panel data for the period between 2007/08 and 2012/13, this study examines the technical efficiency, total factor productivity, and determinants of the technical inefficiency of hospitals. Data envelopment analysis (DEA) and DEA- based Malmquist productivity index used to estimate relative technical efficiency, scale efficiency, and total factor productivity index of hospitals. Tobit model used to examine the determinants of the technical inefficiency of hospitals...
December 2017: Health Economics Review
https://www.readbyqxmd.com/read/28614638/development-and-validation-of-a-3d-printed-model-of-the-ostiomeatal-complex-and-frontal-sinus-for-endoscopic-sinus-surgery-training
#2
Abdulaziz S Alrasheed, Lily H P Nguyen, Luc Mongeau, W Robert J Funnell, Marc A Tewfik
BACKGROUND: Endoscopic sinus surgery poses unique training challenges due to complex and variable anatomy, and the risk of major complications. We sought to create and provide validity evidence for a novel 3D-printed simulator of the nose and paranasal sinuses. METHODS: Sinonasal computed tomography (CT) images of a patient were imported into 3D visualization software. Segmentation of bony and soft tissue structures was then performed. The model was printed using simulated bone and soft tissue materials...
June 14, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28489661/use-of-buccinator-myomucosal-flap-in-tongue-reconstruction
#3
Alessandro Bardazzi, Giada Anna Beltramini, Luca Autelitano, Roberto Bazzacchi, Dimitri Rabbiosi, Marco Pedrazzoli, Karim Tewfik, Angela Rezzonico, Federico Biglioli
The myomucosal buccinator flap, first described by Bozola in 1989, has become an important tool for intraoral defects reconstruction. In the literature, there is a variety of proposed myomucosal cheek flaps, both pedicled and island, based on the buccal or the facial arteries. From January 2007 to December 2011, the authors used a pedicled buccinator flap based posteriorly on the buccal artery to reconstruct partial lingual defects following tumor resection in 27 patients. The buccal fat pad was translated to cover the donor site defect...
June 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28321378/hemi-transseptal-approach-for-pituitary-surgery-a-follow-up-study
#4
Naif Fnais, Salvatore Di Maio, Susan Edionwe, Anthony Zeitouni, Denis Sirhan, Constanza J Valdes, Marc A Tewfik
Objectives The hemi-transseptal (Hemi-T) approach was developed to overcome the potential drawbacks of the nasoseptal flap (NSF) in endoscopic endonasal transsphenoidal skull base surgery. In this study, we describe further refinements on the Hemi-T approach, and report long-term outcomes as compared with traditional methods of skull base reconstruction. Design A retrospective case-control study. Setting Montreal Neurological Institute and Jewish General Hospital, Montreal, Canada. Participants Patients who underwent endoscopic endonasal transsphenoidal approach to skull base pathology...
April 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28291927/single-fraction-radiosurgery-stereotactic-body-radiation-therapy-sbrt-for-spine-metastasis-a-dosimetric-comparison-of-multiple-delivery-platforms
#5
Adrian Nalichowski, Isaac Kaufman, John Gallo, Todd Bossenberger, Tim Solberg, Ezequiel Ramirez, Yulong Yan, Julie Fredrick, Tewfik Bichay, Alan Mayville, Jay Burmeister
There are numerous commercial radiotherapy systems capable of delivering single fraction spine radiosurgery/SBRT. We aim to compare the capabilities of several of these systems to deliver this treatment when following standardized criteria from a national protocol. Four distinct target lesions representing various case presentations of spine metastases were contoured in both the thoracic and lumbar spine of an anthropomorphic SBRT phantom. Single fraction radiosurgery/SBRT plans were designed for each target with each of our treatment platforms...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28272000/study-of-serum-carcinoembryonic-antigen-s-profile-for-breast-cancer-in-western-algeria-100-cases
#6
Zenib Tahari, Asmahane Medjdoub, Tewfik Sahraoui, Leila Belhabri, Fatima Zohra El Kebir
BACKGROUND: Breast cancer is the most common cancer in women worldwide. Biology contributes to the early diagnosis and monitoring of breast cancer with several categories of markers such as prognostic markers (ER, PR, HER2), proliferative markers (Ki67), and tumor markers such as CEA and CA 15-3. CEA can be detected at a high concentration in serum of patients with malignant tumors. AIM: The aim of our study was to evaluate the concentrations of CEA in serum of women with breast cancer and to verify the existence of a possible link between the average rates of CEA and SBR grade...
January 2017: Gulf Journal of Oncology
https://www.readbyqxmd.com/read/28212840/a-density-dependent-model-of-competition-for-one-resource-in-the-chemostat
#7
Radhouane Fekih-Salem, Claude Lobry, Tewfik Sari
This paper deals with a two-microbial species model in competition for a single-resource in the chemostat including general intra- and interspecific density-dependent growth rates with distinct removal rates for each species. In order to understand the effects of intra- and interspecific interference, this general model is first studied by determining the conditions of existence and local stability of steady states. With the same removal rate, the model can be reduced to a planar system and then the global stability results for each steady state are derived...
February 14, 2017: Mathematical Biosciences
https://www.readbyqxmd.com/read/28191806/assessment-of-hypoxic-stress-in-44-women-with-breast-cancer-in-the-west-algeria
#8
Asmahane Medjdoub, Zineb Tahari, Leila Belhabri, Tewfik Sahraoui, Fatima Zohra El Kebir
AIM: The objective of this study was to evaluate the expression of hypoxia-inducible transcription factor 1α (HIF1α) protein profile among women with breast cancer in a population of western Algerian and to correlate the intensity of this expression with prognosis histological grade Scarff Bloom and Richardson (SBR) of the disease and the age of the patients. METHODS: We used a kit provided by Life Science Inc (UScnk) for a sandwich enzyme immunoassay for the quantitative measurement of in vitro HIF1α in plasma in 44 patients and 44 controls in a population of western Algerian...
September 2016: Gulf Journal of Oncology
https://www.readbyqxmd.com/read/28113285/overcoming-long-term-variability-in-local-field-potentials-using-an-adaptive-decoder
#9
Vijay Aditya Tadipatri, Ahmed Tewfik, Guiseppe Pellizzer, James Ashe
Long-term variability remains one of the major hurdles in using intra-cortical recordings like local field potentials for brain computer interfaces (BCI). Practical neural decoders need to overcome time instability of neural signals to estimate subject behavior accurately and faithfully over the long-term. This paper presents a novel decoder that a) characterizes each behavioral task (i.e. different movement directions under different force conditions) with multiple neural patterns and; b) adapts to the long-term variations in neural features by identifying the stable neural patterns...
April 20, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28095898/differences-in-rantes-and-il-6-levels-among-chronic-rhinosinusitis-patients-with-predominant-gram-negative-and-gram-positive-infection
#10
Almoaidbellah Rammal, Marc Tewfik, Simon Rousseau
BACKGROUND: Bacteria are suspected players in the pathogenesis of chronic rhinosinusitis (CRS), yet their exact role is not understood. We investigated the effect of planktonic and biofilm of staphylococcus aureus (SA) and Pseudomonas aeruginosa (PA) on the mucosa of CRS patients with gram-positive and gram-negative infections by measuring the levels of IL-6 and RANTES, a chemokine with activity on eosinophils and T lymphocytes. METHODS: Ethmoid mucosa of six CRS patients with gram-positive bacteria on culture and five with gram-negative bacteria were compared to ethmoid mucosa of 8 control patients...
January 17, 2017: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/27897397/development-and-validation-of-a-septoplasty-training-model-using-3-dimensional-printing-technology
#11
Mahmoud A AlReefi, Lily H P Nguyen, Luc G Mongeau, Bassam Ul Haq, Siddharth Boyanapalli, Nauman Hafeez, Francois Cegarra-Escolano, Marc A Tewfik
BACKGROUND: Providing alternative training modalities may improve trainees' ability to perform septoplasty. Three-dimensional printing has been shown to be a powerful tool in surgical training. The objectives of this study were to explain the development of our 3-dimensional (3D) printed septoplasty training model, to assess its face and content validity, and to present evidence supporting its ability to distinguish between levels of surgical proficiency. METHODS: Imaging data of a patient with a nasal septal deviation was selected for printing...
November 29, 2016: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/27775379/competition-for-a-single-resource-and-coexistence-of-several-species-in-the-chemostat
#12
Nahla Abdellatif, Radhouane Fekih-Salem, Tewfik Sari
We study a model of the chemostat with several species in competition for a single resource. We take into account the intra-specific interactions between individuals of the same population of micro-organisms and we assume that the growth rates are increasing and the dilution rates are distinct. Using the concept of steady-state characteristics, we present a geometric characterization of the existence and stability of all equilibria. Moreover, we provide necessary and sufficient conditions on the control parameters of the system to have a positive equilibrium...
August 1, 2016: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/27690021/ns-%C3%AE-s-time-resolved-step-scan-ftir-of-ba%C3%A2-oxidoreductase-from-thermus-thermophilus-protonic-connectivity-of-w941-w946-w927
#13
Antonis Nicolaides, Tewfik Soulimane, Constantinos Varotsis
Time-resolved step-scan FTIR spectroscopy has been employed to probe the dynamics of the ba₃ oxidoreductase from Thermus thermophilus in the ns-μs time range and in the pH/pD 6-9 range. The data revealed a pH/pD sensitivity of the D372 residue and of the ring-A propionate of heme a₃. Based on the observed transient changes a model in which the protonic connectivity of w941-w946-927 to the D372 and the ring-A propionate of heme a₃ is described.
September 29, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27659282/intraoperative-navigation-in-complex-head-and-neck-resections-indications-and-limits
#14
S Catanzaro, C Copelli, A Manfuso, K Tewfik, N Pederneschi, L Cassano, R Cocchi
PURPOSE: The surgical removal of head and neck tumors often represents a highly complex surgery. The three-dimensionality and the anatomy of the head and neck area make sometimes difficult a correct intraoperative orientation and the obtaining of an adequate oncological safety. In the present pilot study, the authors propose a protocol of application of intraoperative navigation in the resection of head and neck tumors. The purpose is to develop a methodology that can be helpful to ensure oncologic free margins of resection and to facilitate the orientation of the specimen by pathologists...
September 22, 2016: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/27587026/low-dose-rate-brachytherapy-for-the-treatment-of-cervix-cancer-is-outdated-and-should-be-discontinued
#15
Joey L Meadows, Tewfik J Bichay
No abstract text is available yet for this article.
September 2016: Medical Physics
https://www.readbyqxmd.com/read/27330875/the-continuous-assessment-of-cranial-motion-in-thermoplastic-masks-during-cyberknife-radiosurgery-for-trigeminal-neuralgia
#16
Tewfik J Bichay, Alan Mayville
Stereotactic radiosurgery (SRS) treatment is characterized by high doses per fraction and extremely steep dose gradients. This requires a great degree of accurate localization to the appropriate treatment position, and continuous immobilization during the treatment session. In the case of Trigeminal Neuralgia (TGN) treatment this is especially true as the very small target volume makes positional accuracy critical. In this study we carried out a quantitative analysis of patient motion during the full treatment fraction within a radiosurgery immobilization mask system...
2016: Curēus
https://www.readbyqxmd.com/read/27275232/dietary-patterns-of-children-with-autism-spectrum-disorder-a-study-based-in-egypt
#17
Nagwa Meguid, Mona Anwar, Safaa Zaki, Wafaa Kandeel, Nihad Ahmed, Ihab Tewfik
AIM: In the hope to assist in tailoring individualized nutritional therapy, this study aimed to assess the nutritional status of autistic children. MATERIAL AND METHODS: This cross-sectional study included 80 autistic children, divided into two groups: group 1 (aged 3- 5 years) and group 2 (aged 6-9 years). Diagnosis was performed based on the criteria for autistic disorder as defined in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Autism Diagnostic Interview Revised and Autism Rating Scale...
June 15, 2015: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/27252077/a-prospective-randomized-controlled-trial-to-study-the-impact-of-a-nutrition-sensitive-intervention-on-adult-women-with-cancer-cachexia-undergoing-palliative-care-in-india
#18
Neha Kapoor, Jane Naufahu, Sundus Tewfik, Sushma Bhatnagar, Rakesh Garg, Ihab Tewfik
Purpose Advanced cancer patients with disease progression develop cachexia. Nevertheless, cancer patients at nutritional risk have shown improved body weight and quality of life with oral nutritional supplements. Method This was a randomized controlled trial in adult female cancer patients (n = 63) attending palliative clinics, with symptoms of cachexia. Eligible patients were randomly distributed into control (n = 33) and intervention (n = 30) groups. Both groups were provided with nutritional and physical activity counseling, but the intervention group received an additional 100 g of Improved Atta (IAtta) for 6 months daily consumption...
June 1, 2016: Integrative Cancer Therapies
https://www.readbyqxmd.com/read/27223628/block-design-enhances-classification-of-3d-reach-targets-from-electroencephalographic-signals
#19
Ronen Sosnik, Vijay Aditya Tadipatri, Ahmed H Tewfik, Giuseppe Pellizzer
To date, decoding accuracy of actual or imagined pointing movements to targets in 3D space from electroencephalographic (EEG) signals has remained modest. The reason may pertain to the fact that these movements activate essentially the same neural networks. In this study, we aimed at testing whether repetitive pointing movements to each of the targets promotes the development of segregated neural patterns, resulting in enhanced decoding accuracy. Six human subjects generated slow or fast repetitive pointing movements with their right dominant arm to one of five targets distributed in 3D space, followed by repetitive imagery of movements to the same target or to a different target...
August 4, 2016: Neuroscience
https://www.readbyqxmd.com/read/27207588/nanosecond-ligand-migration-and-functional-protein-relaxation-in-ba3-oxidoreductase-structures-of-the-b0-b1-and-b2-intermediate-states
#20
Antonis Nicolaides, Tewfik Soulimane, Constantinos Varotsis
Nanosecond time-resolved step-scan FTIR spectroscopy (nTRS (2) -FTIR) has been applied to literally probe the active site of the carbon monoxide (CO)-bound thermophilic ba3 heme-copper oxidoreductase as it executes its function. The nTRS (2) - snapshots of the photolysed heme a3 Fe-CO/CuB species captured a "transition state" whose side chains prevent the photolysed CO to enter the docking cavity. There are three sets of ba3 photoproduct bands of docked CO with different orientation exhibiting different kinetics...
September 2016: Biochimica et Biophysica Acta
keyword
keyword
22216
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"