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All-epiphyseal versus trans-epiphyseal screw fixation for tillaux fractures:Does it matter?

World Journal of Orthopedics 2022年第2期13卷 131-138页

作者： Brett Heldt Isaiah Roepe Raymond Guo elsayed Attia Ifeoma Inneh Vinitha Shenava Indranil Kushare Department of Orthopedic Surgery Baylor College of MedicineHoustonTX 77030United States Department of Orthopedic Surgery Texas Children's HospitalHoustonTX 77030United States

BACKGROUND Tillaux fractures occur primarily in adolescents due to the pattern of physeal closure and are classified as Salter-Harris type III physeal *** management with screw fixation is recommended for more than 2 mm of displacement or more than 1 mm of ***,the efficacy and complications of trans-physeal vs all-physeal screw fixation have not been investigated *** To compare the clinical and functional outcomes of trans-physeal(oblique)and all-epiphyseal(parallel)screw fixation in management of Tillaux fractures among pediatric *** This was an ethics board approved retrospective review of pediatric patients who presented to our tertiary children’s care facility with Tillaux *** included patients who had surgical fixation of a Tillaux fracture over a 10 year *** analysis included demographics,mode of injury,management protocols,and functional *** patients were divided into group 1(oblique fixation)and group 2(parallel fixation).Baseline patient characteristics and functional outcomes were compared between *** tests to evaluate differences included Fisher’s Exact or Chi-squared and independent samples t or Mann Whitney tests for categorical and continuous variables,*** A total of 42 patients(28 females and 14 males)were *** were no significant differences in body mass index,sex,age,or time to surgery between the groups[IK2].Sports injuries accounted for 61.9%of the cases,particularly non-contact(57.1%)and skating(28.6%)*** Tomography(CT)scan was ordered for 28 patients(66.7%),leading to diagnosis confirmation in 17 patients and change in management plan in 11 patients.[GRC3]Groups 1 and 2 consisted of 17 and 25 patients,*** mid to long-term functional outcomes,there were 14 and 10 patients in groups 1 and 2,*** analysis revealed no significant differences in the functional outcomes,pain scores,

关键词： Tillaux fracture Orthopedic surgery Fixation technique Functional outcomes

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Yolk Sac Tumor of the Ovary in 18 Egyptian Cases: Does It Really Differ?

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Journal of Cancer Therapy 2016年第4期7卷 247-253页

作者： Ahmed elsayed Fathalla Hala Aziz Shokralla Department of Surgical Oncology National Cancer Institute Cairo Egypt Department of Medical Oncology National Cancer Institute Cairo Egypt

Background: Ovarian Yolk sac tumor (OYST) is a rare entity of malignant ovarian germ cell tumors (MOGCT). Abdominal pain, a rapidly growing distending mass or irregular vaginal bleeding is the main presentation. Serum AFP is elevated in nearly all cases. The standard management is fertility preserving surgery with adjuvant chemotherapy. Aim of Work: To report and analyze retrospectively recorded cases that were either treated at National Cancer Institute/Egypt or referred there for advice about therapy. Materials and Methods: This is a retrospective single-institutional analysis of 18 cases of OYST treated at National Cancer Institute-Cairo University from January 2011 till December 2015. The clinical and pathological characteristics, treatment, and outcomes of these patients were analyzed. Results: Data from eighteen patients were obtained. The median age was 18 years (range: 15 - 22). Abdominal pain was the most common presentation (89%). The mean tumor size was 21cm (range: 8 - 30 cm). Eleven of our cases (61%) were stage I, seven cases and (39%) were stage IV at presentation. Fifteen cases (83%) underwent fertility preserving procedure & the standard surgical staging. Panhysterectomy & formal staging procedure was done only in two cases (11%). One case (6%) underwent bilateral salpingo-oophorectomy. 2 cases (11.1%) only underwent lymph node biopsy. 11 patient (61.1%) showed pure type YST while mixed type was present in the remaining 7 cases (38.8%): Dysgerminoma (one case, 5.6%), Dysgerminoma + immature teratoma (one case, 5.6%), Immature teratoma (2 cases, 11.1%) and Teratoma (3 cases, 16.7%). AFP was extremely elevated in all cases at presentation (median 4191 ng/mL;ranging: 725 ng/mL - 402,908 ng/mL). It showed decreased level after surgery (median 145 ng/ mL;ranging: 2 ng/mL - 38,000 ng/mL) & normalized after chemotherapy except for progressive disease. All cases started BEP regimen after surgery with complete remission in twelve cases. In follow up period (

关键词： Yolk Sac Tumor Ovary Outcomes

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Phytochemical and biological activities of Crataegus sinaica growing in Egypt

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Asian Pacific Journal of Tropical Medicine 2010年第4期3卷 257-261页

作者： Alaa Tawfeek Refaat Abdelaaty Abdelaziz Shahat Nermine Ahmed Ehsan Nemat Yassin Faiza Hammouda elsayed Abou Tabl Shams Imbabi Ismail Phytochemistry Department National Research CenterEgypt National Liver Institute Monofia UniversityEgypt Pharmacology Department National Research CenterEgypt Pharmacognosy Department Faculty of PharmacyCairo UniversityEgypt

Objective:To evaluate the cardiac activity and hepatoprotection of Crataegus sinaica (***).Methods:All the isolated compounds were isolated by open-column liquid chromatography(CC) using sephadex LH-20 as stationary *** of the column was performed with EtOH or *** phytochemical investigation of the young stem of *** for the first time together with the leaves and flowers lead to the isolation and identification of quercetin,hyperoside,vitexin-2"-0-rhamnoside,epicatechin,procyanidin B2 and procyanidins ***:Rats treated with the low and high dose of *** leaves with flowers extract showed 15%and 17%reduction in the heart rate,and reduction in the STsegment by 107%and 57%;*** T-amplitude was decreased by 59%of the high dose *** the other hand,the young steins and leaves with flowers extracts of *** on primary culture of rat hepatocytes monolayer indicated a hepatoprotection for the total extract,ethyl acetate,butanol,and chlor of orm fractions at 100μg/mL,75μg/mL,50μg/mL,and 25μg/mL; ***:The results of these chemical and biological studies suggest the use of *** growing in Egypt as a preventive drug against cardiovascular and hepatic diseases. The chemical studies suggest the use of woody young stems as a newly investigated bioactive *** extraction of unsaturated fatty acids from the seeds of the plant would serve as a good health and nutritive product.

关键词： Crataegus sinaica Cardiovascular Hepatoprotection Flavonoids Proanthocyanidins High performance liquid chromatography

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Relationship between gut microbiota and host-metabolism:Emphasis on hormones related to reproductive function

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Animal Nutrition 2021年第1期7卷 1-10页

作者： Tarique Hussain Ghulam Murtaza Dildar H.Kalhoro Muhammad S.Kalhoro elsayed Metwally Muhammad I.Chughtai Muhammad U.Mazhar Shahzad A.Khan Animal Sciences Division Nuclear Institute for Agriculture and Biology CollegePakistan Institute of Engineering and Applied Sciences(NIAB-CPIEAS)Faisalabad38000Pakistan Department of Animal Reproduction Faculty of Animal Husbandry and Veterinary SciencesSindh Agriculture UniversityTandojamSindh70050Pakistan Department of Veterinary Microbiology Faculty of Animal Husbandry and Veterinary SciencesSindh Agriculture UniversityTandojamSindh70050Pakistan Department of Animal Products Technology Faculty of Animal Husbandry and Veterinary SciencesSindh Agriculture UniversityTandojamSindh70050Pakistan Department of Cytology&Histology Faculty of Veterinary MedicineSuez Canal UniversityIsmailia41522Egypt Faculty of Animal Husbandry and Veterinary Sciences University of PoonchRawalakot12350Pakistan

It has been well recognized that interactions between the gut microbiota and host-metabolism have a proven effect on *** gut lumen is known for harboring different bacterial *** by-products and structural components,which are derived through the gut microbiota,generate a signaling response to maintain *** microbiota is not only involved in metabolic disorders,but also participates in the regulation of reproductive hormonal *** phyla,which are localized in the gut,allow for the metabolization of steroid hormones through the stimulation of different *** hormones such as progesterone,estrogen and testosterone play a pivotal role in the successful completion of reproductive *** in this mechanism may lead to reproductive *** bacteria can affect the metabolism,and degrade steroid hor-mones and their relevant *** behavior of the bacteria can safely be implemented to eliminate steroidal compounds from a polluted *** this review,we summarize the meta-bolism of steroid hormones on the regulation of gut microbiota and vice-versa,and also examined the significant influence this process has on various events of reproductive ***,the evidence suggests that steroid hormones and gut microbiota exert a central role in the modification of host bacterial action and impact the reproductive efficiency of animals and humans.

关键词： Gut microbiota Host-metabolism Steroid hormone Reproductive function

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Extracranial Head and Neck, Peripheral Nerve Tumors: A 10-Year Experience at NCI, Egypt

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Journal of Cancer Therapy 2019年第12期10卷 948-957页

作者： Hala Aziz Shokralla Ahmed elsayed Fathalla Medical Oncology Department National Cancer Institute Cairo University Cairo Egypt Surgical Oncology Department National Cancer Institute Cairo University Cairo Egypt

Background: Peripheral nerve tumors (PNT) originate from the neural crest and typically formed from Schwann cell sheath. Considering the number of nerves in this area, they form a very small percentage of neoplastic lesions of the head & neck. A solitary mass in the lateral neck frequently confronts the surgeon. An uncommon cause for such a nodule is a neoplasm arising from nerve tissue with PNTs being the commonest of them to face. Aims: To study the clinico-pathological characteristics, presentations, surgical approaches, postoperative complications & outcome of management. Materials & Methods: a single institution combined retrospective & prospective study. A retrospective analysis of all cases presented NCI-Cairo University with H&N extracranial PNST candidate for surgery from Jan 2009 until the end of Dec 2015 & prospective analysis of all cases with the same presentation presented to the NCI from Jan 2016 until the end of June 2019. 23 cases were included. Data were collected then analyzed. Results: Mean age was 34.7 years with female to male ratio 1.9:1. Mean size was 5.4 cm. Commonest presentation was asymptomatic neck lump located laterally in the neck (9 cases, 39%). CT scanning was done in 17 cases (74%). As regard pathology, we have only 4 malignant cases (17%). Most tumors (9 cases, 39%) originated from cranial nerves. 18 cases (78%) were resected through the neck. Complication occurred in 13 cases (56%), most of them during tumor dissection from its nerve origin or root. Vascular complications occurred in 6 cases (26%) due to bleeding controlled with ECA ligation (facial ischemia, hemiparesis & paresthesia). Cranial nerve injury (XI, XII) occurred in two cases (8.7%) & Speech defects in other two 2 cases (8.7%) due to maxillary resection. Postoperative?radiation was given to all 4 malignant cases (17%) of MPNST with Postoperative Chemotherapy to all cases experienced relapse after adjuvant RT. Post-operative palliative RT was given to (2 cases, 8.7%) w

关键词： Peripheral Nerve Tumors Outcome NCI Cairo University

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The Impacts of Building Regulations on the Thermal Performance and Energy Consumption of Residential Buildings in Riyadh City-Saudi Arabia

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Open Journal of Energy Efficiency 2021年第1期10卷 1-21页

作者： Saleh Baharetha elsayed Amer mohammad Kotbi Department of Architecture and Building Sciences College of Architecture & Planning King Saud University Riyadh Saudi Arabia

Riyadh city is the fastest growing city in Saudi Arabia. The rapid urban growth that happened recently in Riyadh was not based on the traditional urban planning principles, which have been established and applied for the city development process. The imported building regulations have created a new urban structures and street patterns. The contemporary urban form in Riyadh city is based mainly on traffic and economic consideration with the neglect of environmental dimensions. This research aims to examine the impacts of building regulations on the thermal performance of residential buildings in Riyadh city, with the ultimate goal of establishing planning guidelines that consider the environmental conditions of the city. The methodology adopted for achieving the aim of this study consists of two phases. First, the literature related to building regulations development in Riyadh, as of 2018, was reviewed. Second, buildings energy simulation was conducted to examine the thermal performance of the typical current status of residential building blocks in Riyadh city, and then several changes to building regulations were made to investigate their impacts on the thermal performance of buildings. The results showed that the impacts of Riyadh building regulations on the thermal performance of residential buildings differ across the evaluated cases. The ratio of building height to street width, urban block street orientation, and building orientation are the main factors affecting thermal performance of buildings within urban block. The study also concludes that adjusting the ratio of building height to the distance between buildings could have a significant impact in reducing cooling loads. This study will help policy makers, planners and designers to investigate the shortcoming in the current building regulations.

关键词： Building Regulations Energy Consumption Thermal Performance Residential Buildings

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Virtues of Using a Double Lumen Tube for Anesthesia in Patients with Endobronchial Tumours Requiring Open Lung Resection or Bronchoplastic Procedures

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Open Journal of Anesthesiology 2020年第1期10卷 1-12页

作者： Assem Adel moharram Hany Hasan elsayed Faculty of Medicine Ain Shams University Cairo Egypt

Objective The benefits and risks of using double lumen tube (DLT) in open thoracotomy are not well studied and the relative contraindication for using it in cases of endobronchial tumours is not proven. In this study, we compared our experience with using DLT versus single lumen tube (SLT) for anesthesia in patients requiring an open thoracotomy for resection of endobronchial tumours. Methods A prospective observational study was performed in a single tertiary care university hospital in patients with endobronchial tumours anesthetized with single and double lumen tubes for open thoracotomy procedures over a period from 2010 till 2018. Results One hundred and six patients with endobronchial tumours were studied. There were 76 males. Median age was 32 years (14 - 62). In 96 cases, endobronchial pathology was a typical carcinoid. 58 patients were anesthetized using a DLT and 48 using a SLT. Four cases of near miss from potentially fatal intraoperative tumour migration occurred in the SLT group (p = 0.025). There was only one case of mild tumour bleeding from the DLT group and time of insertion was longer (16.2 vs. 4.5 min p Conclusions We conclude that it is safe to place a double lumen endo tracheal tube for patients with endobronchial tumours requiring open lobectomies or bronchoplastic procedures. An additional benefit of DLT use is increasing surgical satisfaction by reducing spillage and tidal volume loss during surgical anastomosis of the open airway.

关键词： Double Lumen Tube Endobronchial Tumor Thoracotomy

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Simulation of Dual-Band MWCNT Ink-Based Spiral Antenna: A Comparative Study

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Journal of Electromagnetic Analysis and Applications 2012年第4期4卷 182-186页

作者： Taha elsayed Taha mohamed Ali Soliman Ali mohamed Gomaa Wael elsayed Swelam National Telecom Regulatory Authority Cairo Egypt 3Shobraa Faculty of Engineering Benha University Cairo Egypt

In this paper, we compare a dual-band, square spiral microstrip patch antenna constructed from Multi-Walled Carbon Nanotubes (MWCNT) ink for wearable application simulated by Computer Simulation Technology Microwave Studio (CST MWS) by our work simulated by Advanced Design System (ADS) electromagnetic simulator using the same material characterization. The reflection coefficient is –12 dB at 1.2276 GHz for MWCNT and –13 dB at 1.25 GHz for the copper simulated by CST MWS and reflection coefficient is –12.235 dB at 1.234 GHz for MWCNT and –18.36 dB at 1.243 GHz for the copper simulated by ADS and the reflection coefficient is –27dB at 2.47 GHz for MWCNT and –13 dB at 2.53 GHz for the copper simulated by CST MWS and the reflection coefficient is –26.08 dB at 2.48 GHz for MWCNT and –17.031 dB at 2.47 GHz for the copper simulated by ADS. We show the meandering of the surface current on the radiating in spiral patch. The antenna gain is found to be –12.5 dBi at 1.22 GHz for MWCNT and is found –12.05 dBi at 1.25 GHz at CST MWS and the antenna gain is found to be –11.85 dBi at 1.235 GHz for MWCNT and is found –12.25 dBi at 1.243 GHz at ADS and the antenna gain is found to be –4.25 dBi at 2.47 GHz for MWCNT and is found –4.01 dBi at 2.53 GHz at CST MWS and the antenna gain is found to be –4.23 dBi at 2.47 GHz for MWCNT and is found –4.88 dBi at 2.45 GHz at ADS. We show a close agreement in the results obtained by the two simulation software's CST MWS and ADS. The results are given for both MWCNT and Copper characterizations.

关键词： Copper MWCNT CST MWS ADS and Spiral Microstrip Antenna

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Three-dimensional seismic attenuation tomography of Egypt

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Natural Science 2012年第8期4卷 608-623页

作者： elsayed Fergany Mamdouh Abass Carlos Vargas Department of Geosciences Universidad Nacional de Colombia Bogota Colombia National Research Institute of Astronomy & Geophysics Helwan Cairo Egypt

The main purpose of the paper is assessing the three-dimensional (3-D) seismic tomography beneath Egyptto reveal the laws of the tectonic activity, dynamic features of the crust and the upper mantle as well as the thermal structure. Thecoda wave attenuation (Q-1c ) was obtained using the single scattering theory for the central frequencies of interest laid between 1 and 24 Hz. A regionalization of the estimated Q-1c values was performed by means of a generalized inversion *** obtained spatial distribution of 3-D attenuation results revealshigh contrasts between East and West Egypt. A remarkable contrast in the attenuation levels was compared with the tectonic structures, geothermal gradient and heat flow features. The highest attenuations are concentrated in the east and north western offshore regionsat central frequency 1.5 Hzthat draw a good matching with the seismic andthermal features of Egypt. Smaller attenuation levels were detected with young sediments of the Nile Valley from South to the northern triangle of Nile Delta basin except seismic active areas. Low or normal attenuation was detected at western desert where there is a stable and simple shelf. We can conclude that the extended highest attenuation joins to the strong seismic sources and geothermal structures at lower frequency and the centralized high attenuation takes place at moderate seismic sources at a higher frequency. The 3D attenuation maps can draw not only tectonic and geothermal structures but also the general geologic structure map.

关键词： Seismic Coda Waves Attenuation Tomography Seismicity Tectonic Geothermal Geologic Epoch

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Acute Correction of Varus Knee by Biplanar Medial Opening-Wedge High Tibial Osteotomy and Fixation with TomoFix Plate

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Open Journal of Orthopedics 2019年第4期9卷 89-100页

作者： elsayed Shaheen mohamed Abdel-Aal Morsy Orthopedic Surgery Department Faculty of Medicine Al-Azhar University Cairo Egypt

Background: Biplanar medial opening wedge high tibial osteotomy (MOWHTO) is a treatment method that allows adequate correction of symptomatic varus knee deformity. However, MOWHTO tends to decrease patellar height and increase the posterior tibial slope, which can affect the knee joint stability. Objective: The aim of this study was to describe the technique of biplanar MOWHTO and fixation by TomoFix plate, as well as to evaluate the accuracy of the planned correction and the postoperative tibial slope. Patients and Methods: This prospective cohort study was conducted on patients who presented with varus knee deformity and underwent biplanar MOWHTO and fixation by TomoFix plate during the period from March 2016 to March 2017. Assessment of patients included pre- and postoperative Knee and function scores, mechanical femorotibial angle (mFTA), posterior tibial slope angle (pTSA), range of motion (ROM) and radiological evaluation of the healing of the osteotomy site. Results: The recruited patients were 13 (8 men and 5 women), with average age 31.7 years old. The knee and functional scores improved from the preoperative mean of 45 and 41 to the postoperative mean of 85 and 72 points, respectively. The average knee flexion was 115 degrees, which at the final follow-up remained unchanged except for one case. The mean preoperative mFTA was 13.5°varus and decreased post-operatively to a mean of 3°valgus. The average postoperative follow-up period was 12 months (10 - 18 M). Conclusion: The biplanar MOWHTO allows preservation of posterior tibial slope while correcting the varus knee adequately.

关键词： Varus Knee Biplanar Medial Opening-Wedge High Tibial Osteotomy TomoFix Plate

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