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Search Results: 1 - 10 of 401590 matches for " Waleed M. Hussen "
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Carotid Body Tumour: The Second Case Series from Baghdad, Iraq  [PDF]
Waleed M. Hussen, Abdulsalam Y. Taha, Diar S. Hama-Kareem
International Journal of Clinical Medicine (IJCM) , 2015, DOI: 10.4236/ijcm.2015.63019
Background: Carotid body tumour (CBT) is a rare neoplasm, yet it is the commonest head and neck paraganglioma. In Iraq, relevant literature is sparse. Herein, we present our second case series. Methodology: Patients with CBTs that were operated upon in the Department of Thoracic and Vascular Surgery, Baghdad Medical City from 2010 to 2014 were enrolled. History and examination were followed by a workup of duplex ultrasonography, CT scan, magnetic resonance imaging, CT or conventional carotid angiography. Surgical exploration via a standard anterolateral cervical incision and subadventitial dissection was used to resect the tumours with preservation of carotid arteries. Intra-luminal carotid shunts and vein grafts were prepared to be used if necessary. Results: There were 5 males and 2 females aging 17 - 46 with a mean of 32.9 ± 9.8 year. All patients had slowly growing painless pulsatile swelling below mandiblular angle for long durations (1 - 25 years) and a positive Fontaine’s sign. All tumours were benign, unilateral (right n = 4, left n = 3) and ranging in size from 3 × 3 cm to 6.4 × 3.2 cm. Beside US neck exam, carotid angiography was done in 5 patients. According to Shamblin classification, 4 were class II, 2 class I and 1 class III. All tumours were successfully resected with preservation of ICA. However, the ECA was safely ligated twice due to severe involvement. Tongue deviation occurred once (14.3%) but no patient died and none had stroke or recurrence. Conclusions: Our results of surgery for CBT compare very well with the international standards.
Optimization Method to Determine Gross Alpha-Beta in Water Samples Using Liquid Scintillation Counter  [PDF]
Waleed M. Abdellah
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.59092

Liquid scintillation counting (LSC) is an adequate nuclear technique to determine radioactivity levels, as verified by this study for the determination of the gross alpha and beta activities of aqueous samples because of its simplicity and low associated cost comparison with other techniques. This paper discusses a new approach to the monitoring of gross alpha and gross beta activities in water. The method consists of using pulse decay discrimination (PDD) liquid scintillation counting LSC of 2 ml of the sample after conditioning with 12 ml of AB-Ultima Gold LSC cocktail, and PDD 139 condition. Different factors that affected on the counting efficiency were studied such as quench reaction, volume of sample, and type of vial. The gross alpha and gross beta particle activity measurement using 40K and 243Am with different activities concentration for efficiency determination. The calculated detection limits were 0.07 Bq/l and 0.12 Bq/l for gross alpha and gross beta respectively for 500 min measurements of samples produced by concentration of one liter of water.

Validation of 226Ra and 228Ra Measurements in Water Samples Using Gamma Spectrometric Analysis  [PDF]
Hanan M. Diab, Waleed M. Abdellah
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.58A008

Radium isotopes can be analyzed by different analytical methods based on gamma spectrometric measurements or alpha spectrometry. An improved method was developed to determine radium isotopes from water using gamma spectrometry after radiochemical separation. The Radium was selectively extracted from acidified samples using co-precipitation procedure with iron hydroxide and followed by precipitation of radium as radium sulphate Ba(Ra)SO4. The precipitate Ba(Ra)SO4 was filtered through the Millipore filter paper, dried and weighed to calculate chemical yield. 226Ra and 228Ra activities were measured using low-background gamma spectrometry in water samples. Radium was pre-concentrated from environmental samples by co-precipitation with BaSO4. The amounts of 226Ra and 228Ra on the sample were obtained by gamma-ray spectrometry for the 351 keVγ-ray from 214Pb and for the 911 keV γ-ray from 228Ac, both in radioactive equilibrium with precursors, respectively. The accuracy, selectivity, traceability, applicability and Minimum Detectable Activity (MDA) of the technique were

Use of Basal Serum Testosterone Level as Predictor for Poor Ovarian Response in Women with Unexplained Infertility Undergoing In Vitro Fertilization Cycle: Prospective Study  [PDF]
Waleed M. Khalaf, Hayam Fathy, Sarah Safwat
Open Journal of Obstetrics and Gynecology (OJOG) , 2018, DOI: 10.4236/ojog.2018.814153
Abstract: Background: Delayed pregnancy in women and marked increase in the numbers of older women who fail to respond to ovarian stimulation had been a significant issue. This study aims to assess the value of basal serum testosterone level as a predictor of ovarian response for induction of ovulation in women with unexplained infertility undergoing IVF (in vitro fertilization) cycle. Patients and Methods: A prospective study was conducted in Ain Shams University Maternity hospital Infertility Center during a period of time from October 2016 to June 2017. This study recruited 89 women. On day 2 or 3 of a spontaneous menstrual cycle of the included women within 3 months before fresh IVF cycle, basal hormonal (FSH, LH, estradiol, total testosterone) concentrations, AFC (antral follicle count) were performed. Using the Long-protocol for induction of ovulation, serial monitoring of ovarian response was assessed by transvaginal ultrasound. When the expected ovarian response was reached (at least three oocytes 17 mm), we gave trigger dose of HCG. Ultrasound guided oocyte aspiration was performed 34 -
Computational Aspects of Electromagnetic Fields near H.V. Transmission Lines  [PDF]
Ossama E. GOUDA, Ghada M. AMER, Waleed A. SALEM
Energy and Power Engineering (EPE) , 2009, DOI: 10.4236/epe.2009.12010
Abstract: Biological effects of electromagnetic fields on the human body, animals and plants have been a subject of scientific interest and public concern for their risk on the living organisms such as blood leukemia and others. The high voltage transmission and distribution lines, which pass beside some houses, factories and schools are source of electromagnetic fields. This paper presents the field calculations around and near of high voltage transmission lines 220 kV and 500kV. To calculate the induced current, the power density, the electric field and the magnetic field of grounded and ungrounded human body cylindrical model are used. MATLAB program package is used for mathematical calculation of the distribution of the EMF in human body under high voltage power transmission lines.
Study of Vitamin D Receptor (VDR) Gene Polymorphisms among Egyptian Cohort Patients with Different Stages of Colorectal Cancer  [PDF]
Mohamed M. Rizk, Nermine H. Zakaria, Waleed G. Elshazely
Journal of Cancer Therapy (JCT) , 2014, DOI: 10.4236/jct.2014.53033

Colorectal cancer represents the third cancer worldwide. Studies showed thatinsufficient levels of vitamin D may result in colorectal cancer. Genetic variations in genes controlling vitamin D activity would play a role in determining susceptibility to colorectal cancer. Aim of the work: to study the different genotypes of VDR polymorphisms and detect the association between serum levels of 25(OH)VitD and 1,25(OH)2VitD among sample of Egyptian patients with different stages of colorectal cancer. Methods: Ninety patients (60 with different stages of colorectal cancer and 30 patients with benign pathology of the colon) together with 30 healthy controls were examined using PCR-RFLP analysis for FokI, ApaI and TaqI polymorphisms. Results: Genotype distribution for ApaI polymorphism showed no statistically significant difference between patients (colorectal cancer and benign) and controls with p = 0.1. There was no statistically significant difference in FokI polymorphism where p = 0.26 and genotype distribution for TaqI was also insignificant with p = 0.016. The median serum level of 25(OH)VitD was low in cancer cases compared to the control group and benign cases with (p < 0.001). There

Subrectal and Subcutaneous Wound Infiltration with Bupivacaine versus Pethidine for Post Cesarean Section Pain Relief: Randomized Controlled Trial  [PDF]
Waleed M. Khalaf, Mohamed Elmandouh Mohamed Ibrahim, Sarah Safwat
Open Journal of Obstetrics and Gynecology (OJOG) , 2018, DOI: 10.4236/ojog.2018.811108
Abstract: Background: Cesarean section (CS), one of the most common major operative procedures, performed all over the world. Incisional infiltration with local anesthetics is a simple, cheap and effective mean of providing good analgesia for surgical operations without any major side effects & allowing early patients’ mobilization & postoperative recovery, so the purpose of study is to compare between the effect of wound infiltration with bupivacaine versus pethidine for post cesarean section pain relief. Patients and Methods: A randomized controlled trial (RCT) was conducted in Ain Shams University Maternity hospital in the period from August 2016 and January 2017. 100 full term pregnant females randomized into two groups: Group A (50 patients) Bupivacaine group: Subcutaneous and subrectal infiltration with 10 ml 0.25% Bupivacaine (2.5 mg/ml) diluted in 10 ml normal saline before closure of the wound was done; Group B (50 patients) Pethidine group: Subcutaneous and subrectal infiltration with 1 ml pethidine (50 mg/ml) diluted in 19 ml normal saline before closure of the wound was done. All patients had cesarean section under spinal anesthesia. Study outcome measures post-operative pain scores using visual analogue scale, post-operative analgesia requirement time to first rescue analgesia, onset of mobilization, side effect of local anesthetic, wound infection (after one week). It was registered on clinical trials.gov with ID: NCT03652116. Results: Visual analogue scale values differ significantly between pethidine group and that of bupivacaine at rest and on coughing at 4, 8, 12, 24 hours & analgesic consumption (P value < 0.05). There is high statistical significant difference in 1st time request analgesia per minute comparing group A to group B (P value 0.001). There is no significant difference between bupivacaine and pethidine regarding time of ambulation, side effects or complications. Conclusion: Infiltration of the wound of cesarean section with pethidine gives effective analgesia for several hours as compared to Bupivacaine.
Effect of Metformin on Endometrial Thickness and Subendometrial Flow Patterns in Anovulatory Patients with Polycystic Ovarian Syndrome  [PDF]
Waleed M. Khalaf, Sherif A. Akl, Rania R. Ramadan
Open Journal of Obstetrics and Gynecology (OJOG) , 2018, DOI: 10.4236/ojog.2018.814148
Abstract: Background: Polycystic ovarian syndrome (PCOS) is considered the commonest endocrinological disorder affecting reproductive aged women. PCOS compromises fertility through various pathways. These pathways include hyperandrogenism, insulin resistance and impedance of the uterine and endometrial blood flow. Metformin improves the blood flow to the endometrium. It acts by reducing androgen level and correction of insulin resistance. Endometrial vascular indices were evaluated in this study to evaluate endometrial receptivity in anovulatory patients with PCOS. Aim of the Work: To evaluate the outcome of metformin administration in anovulatory patients with PCOS and its effect on the endometrium. This included its role in ovulation and improvement of pregnancy rates. Patients and Methods: This study included 85 patients from Ain Shams University outpatient infertility clinics from 1st of January, 2018 till 30th of June, 2018. We investigated these patients before treatment with ultrasound on day 14, 21. We evaluated endometrial thickness, uterine artery flow pattern, endometrial and subendometrial flow patterns. The patients received metformin 500 mg three times per day for three months. After this duration, we reevaluated them by ultrasound at days 14, 21. Results: Metformin therapy resulted in a significant increase of endometrial thickness and had a significant decrease on uterine, endometrial and subendometrial resistance index (R.I) and pulsatility index (P.I) at day 14, 21 compared to pre-treatment values indicating better blood flow. Conclusion: Metformin therapy resulted in improvement of endometrial flow patterns. Also, it resulted in increase in endometrial thickness and improvement of uterine artery flow.
Influence of Internal Combustion Engine Parameters on Gas Leakage through the Piston Rings Area  [PDF]
Waleed Momani
Modern Mechanical Engineering (MME) , 2017, DOI: 10.4236/mme.2017.71003
In this work, the influence of internal combustion engine parameters (cylinder-piston clearance, piston head height, the first segment position, gap of the first piston ring and gap of the second piston ring, piston rings’ axial clearance, intake valve debit coefficient) gas leakage from the combustion chamber through the piston rings’ area was investigated. This influence was studied by making an initial forming operation over gas leakage in the analyzed area.
Low-Level Laser Therapy versus Four Layers Compression Technique in the Treatment of Venous Ulcers  [PDF]
Medhat El-Laboudy, Ayman M. Samir, Ahmad M. Tawfik, Waleed A. Sorour, Adel M. Tolba
Surgical Science (SS) , 2014, DOI: 10.4236/ss.2014.59065
Abstract: Objective: The aim of the study is to evaluate the effect of low-level laser therapy in comparison to compression bandage therapy in the treatment of venous ulcers. Subjects & Methods: This study was carried out in the period from March 2013 to March 2014. The study included 40 adult patients with a diagnosis of venous ulcer classified as C6 according to the clinical classification of CEAP classification. The patients were divided into 2 groups: the first one included 20 patients treated by low-level laser therapy at the Rheumatology and Rehabilitation department, and the second group included 20 patients in whom we use four layers compression bandaging at the vascular surgery department. Results: 32 ulcers were treated in group I and 35 ulcers were treated in group II. The patients of group I were 7 (35%) females and 13 (65%) males, their age range were (24 - 56) years. The patients of group II were 11 (55%) males and 9 (45%) females; their age ranges were (32 - 50) years. Measurements of the ulcers size by (cm2) were taken at the beginning of therapy, at 1 month, at 2 months and at 3 months later on. The calculation of the area of the ulcer was done by using the graph papers to document the ulcer’s perpendicular linear dimensions. According to the size of the ulcer, some ulcers heal within 1 month (15.6%) ulcers in group I, and (28.5%) in group II. Some ulcers heal within 2 months (28%) in group I, and (37%) in group II. The remaining ulcers heal within 3 months or more which are (56%) ulcers in group I, and (34.2%) ulcers in group II. The recurrence rate of chronic venous leg ulcer in compression bandage technique used in group II was the least one as the total number of recurrent cases were 5 (25%), followed by laser therapy used in group I. Conclusion: There was no significant efficacy of the low-level laser therapy over the four layers compression technique in the management of chronic venous ulcers.
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