Mohamed Gaber Eissawy

Minia University Hospital

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Behavior of Reinforced Concrete Columns Reinforced with GFRP Bars

Engineering Research Journal - Faculty of Engineering (Shoubra) (2022)

Abeer M. Erfan Gamal Taher youssef hammad Mohamed Gaber Eissawy

Fiber composites as reinforcement gained a great acceptance in reinforcement different concrete elements.This is due to its high tensile strength and its performance in the concrete columns as longitudinal and transverse reinforcement stirrups.In this study Glass Fiber Reinforced Polymers (GFRP) with different diameters are applied.Four groups of concrete columns with fixed longitudinal reinforcement of 4 Φ 10 as main steel reinforcement and different transverse reinforcement in diameter and number (stirrups) were studied.First specimen was the control one reinforced with ordinary steel reinforcement the other specimens reinforced using GFRP stirrups different in diameter Φ 6, 8, 10 and the number of stirrups in meter.The transverse reinforcement effects the ultimate failure, local capacity, lateral deflection and ductility ratio.The vertical displacement, cracking load and ultimate load of the tested columns were recorded and analyzed.The ultimate load increased.In first group, the ultimate load increased by 8.2%, 23.5% and 44.3% as the confinement numbers of GFRP stirrups increased from 575 kN to 622 kN to 710 kN to 830 kN.For second group, the ultimate load increased by 30.4%, 37.4% and 54.8% as the confinement numbers of GFRP stirrups increased from 575 kN to 750 kN to 790 kN to 890 kN.For third group, the ultimate load increased by 39.1%, 47.8% and 60% as the confinement numbers of GFRP stirrups increased from 575 kN to 800 kN to 850 kN to 920 kN.NLFEA analysis was carried out.Good agreement between the experimental and the NLFEA results was achieved.

Bar (unit)

10.21608/erjsh.2022.148961.1058

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Endovenous laser ablation of varicose veins

The Egyptian Journal of Radiology and Nuclear Medicine (2015)

Mohamed Gaber Eissawy Ehab Ali Abdelgawad Mostafa Abd ELFatah El-Shereif

To assess the value of endovenous laser ablation as a treatment of varicose veins. Study included 30 patients (22 females, 8 males) with a mean age of 38.4 years (age range from 25 to 55 years) presented with varicose vein caused by saphenofemoral junction (SFJ) incompetence with Great Saphenous Vein (GSV) reflux. Patients underwent Endovenous Laser Therapy (EVLT) with 980-nm diode laser as an outpatient procedure. Patients were re-examined one week, 1, 2 and 3 months postprocedure. Immediate postoperative successful occlusion that is defined as absence of flow by duplex ultrasound, was achieved in 29 GSVs (97%). Failure occurred in one case with large vein (GSV diameter > 0.8 cm). The procedure was well tolerated by all patients. The mean GSV diameter measured in upright position, was 6.5 mm (range from 4 to 9 mm). The mean length of treated GSV was 44.2 cm (range from 38 to 50 cm). Ecchymosis was seen in 18 patients (72%). Indurations were observed in 2 patients (6%) and resolved within two weeks. No paresthesia, superficial burns or DVT was detected. Endovenous laser ablation for GSV reflux is a safe, feasible and efficient outpatient technique.

Ecchymosis

Great saphenous vein

Outpatient clinic

Laser Ablation

Angioscopy

10.1016/j.ejrnm.2015.10.011

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Citations (4)

MR diffusion and MR dynamic contrast-enhanced sequences in the characterization of ovarian tumors

El-Minia Medical Bulletin (2019)

Nadia El Ameen Mohamed Gaber Eissawy Laila Mohsen Omnia Mokhtar Nada Gerges M. Beshreda

Background: low birth weight (LBW) is one of the major determinants of perinatal survival, infant morbidity, and mortality as well as the risk of developmental disabilities and illnesses in future.WHO estimates that 25 million LBW babies are born annually worldwide and 95% occur in developing countries.In Egypt, as in many other developing countries, most infant and childhood mortality has been also due to diarrhea, acute respiratory infections, other infectious diseases such as meningitis, neonatal infections and vaccine preventable diseases.These conditions are more critical among LBW children since they are more at risk of premature birth, fetal defects, neonatal complications, deficient immune system and greater exposure to infections.Global nutrition targets set at the World Health Assembly in 2012 include an ambitious 30% reduction in LBW prevalence between 2012 and 2025.Aim of the study: To estimate percentage and risk factors of LBW among population in Mallawy city, Minia, Egypt.Research methodology: This study is prospective cohort study among pregnant females in 3 rd trimester, included 346 participants, recruited from two health centers in Mallawy city.Face to face interview questionnaire was used in data collection.Results: LBW cases consisted 32.4% of all participants.By logistic regression analysis twin pregnancy, hypertension and preterm labor (PTB) were associated with the highest probability to LBW, with AOR= 3.88, 3.43 and 3.30 respectively.Conclusion: working status, passive smoking, short interpregnancy intervals, twin pregnancy, PTB, hypertension, and vaginal bleeding during pregnancy found to be risk factors for LBW.Recommendations: Increase the community awareness of risk factors of the problem.More research on larger populations is necessary for risk assessment and long term consequences of LBW.

Characterization

Dynamic contrast

10.21608/mjmr.2022.221699

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Accuracy and diagnostic value of diffusion-weighted whole body imaging with background body signal suppression (DWIBS) in metastatic breast cancer

The Egyptian Journal of Radiology and Nuclear Medicine (2021)

Mohamed Gaber Eissawy Amr Saadawy Kamel Farag Tamer Akl Wael Hamza Kamr

Abstract Background Breast cancer is the most common malignant tumor among women. The mortality of the patients could be mainly attributed to metastasis and spread of breast cancer to distant sites. The objective of the current study is to evaluate and express the role of diffusion-weighted whole body imaging with background body signal suppression (DWIBS) in detection of osseous and soft tissue metastatic lesions in patients with cancer breast. Results The current prospective study included 50 female patients with pathologically proven breast cancer. The overall sensitivity of DWIBS and STIR were 97.5% and 92.5%, respectively. DWIBS was the most sensitive sequence with highest negative predictive values. DWIBS and STIR were the most sensitive with the highest negative predictive value. Both DWIBS and STIR detected more vertebral metastatic deposits (100% and 97.8%, respectively) and more soft tissue lesions (94.4% for both) than WB DWI and T1WI. Conclusion DWIBS MRI sequence is an effective method for detection of solid organ, bone and lymph node metastasis but not specific for characterization of lesions.

Whole body imaging

10.1186/s43055-021-00451-y

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MR diffusion versus MR perfusion in patients with ovarian tumors; how far could we get?

The Egyptian Journal of Radiology and Nuclear Medicine (2020)

Nadia F. El Ameen Mohamed Gaber Eissawy Laila Mohsen Omnia Mokhtar Nada Gerges M. Beshreda

Abstract Background Ovarian tumors are one of the prevalent gynecological tumors. They are the fifth commonest tumor in women. The therapeutic strategy depends on whether the tumor is benign, borderline or malignant. They always cause nonspecific symptoms at early stages and diagnosed at advanced stages. We tried to test and compare the sensitivity and accuracy of diffusion-weighted imaging (DWI) and MR perfusion in the diagnosis of ovarian tumors among fifty patients with ovarian masses who collected after meeting the inclusion criteria depending on grayscale sonographic findings after the approval of the ethical committee of our institution. The sensitivity and accuracy of the techniques were compared. Results The surgical and pathological reports of our patients proved a non-tumorous lesion in three patients. They also proved benign ovarian tumors in 18/47 (38.3%) patients, borderline tumors in 4/47 (8.5%) patients and malignant ovarian tumors in 25/47 (53.2%) patients. According to conventional MRI, ovarian tumors could be diagnosed with sensitivity 92%, specificity 61.11%, PPV 76.7%, NPV 84.6% and accuracy 79.1%. DWI and MR perfusion showed the same results where they showed sensitivity 98%, specificity 83%, PPV 90%, NPV 98% and accuracy 93% with ADC cut-off value 1 × 10− 3 mm 2 /s. Conclusion Diffusion-weighted imaging and MR perfusion are useful in the diagnosis of ovarian tumors with approximately the same sensitivity and positive impact on operative management.

Ovarian tumor

10.1186/s43055-020-0141-5

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The value of contrast-enhanced FLAIR magnetic resonance imaging in detecting meningeal abnormalities in suspected cases of meningitis compared to conventional contrast-enhanced T1WI sequences

The Egyptian Journal of Radiology and Nuclear Medicine (2020)

Wael Hamza Kamr Mohamed Gaber Eissawy Amr Saadawy

Abstract Background Early diagnosis of meningitis with magnetic resonance imaging (MRI) would be useful for appropriate and effective management, decrease morbidity and mortality, and provide better diagnosis and treatment. The objective of the current study is to compare the accuracy of contrast-enhanced FLAIR (CE-FLAIR) and contrast-enhanced T1WI (CE-T1WI) in the detection of meningeal abnormalities in suspected cases of meningitis. Results Out of 45 patients, 37 patients were confirmed to have meningitis on CSF analysis. Out of the 37 patients, 34 patients were positive on CE-FLAIR sequence and 27 were positive on CE-T1WI. The sensitivity of CE-FLAIR sequence was 91.9% and specificity 100%, while the sensitivity of CE-T1WI sequence was 73% and specificity 100%. Conclusion CE-FLAIR is more sensitive than CE-T1WI in diagnosis of meningitis. It is recommended to be used in any cases with clinically suspected meningitis.

Fluid-attenuated inversion recovery

Contrast Enhancement

10.1186/s43055-020-00348-2

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Benign prostatic hyperplasia morphological parameters for assessing risk of acute urinary retention

African Journal of Urology (2022)

Ahmed H. Gabr Ahmed Abdelatif Mostafa S. El sharkawy Ahmed H. Ismail Ahmed El Batnanonuy

Abstract Aim of the study To evaluate objective measurements of morphological changes of the prostate in Benign Prostatic Hyperplasia (BPH) as predictors of acute urinary retention (AUR). Methods Overall 169 consecutive patients older than 50 years of age were prospectively divided into group A ( n = 61); men with acute urinary retention (AUR), or group B ( n = 108); men with different degrees of lower urinary tract symptoms (LUTS). Transrectal ultrasound (TRUS) measurements of total prostate volume (TPV), transitional zone volume (TZV), ratio of TZV to TPV (TZV/TPV), and vesico-urethral angle (VUA) were recorded. Group B patients also had post-void residual (PVR) and maximum flow rate (Q-max) recorded. TZV/TPV and VUA were correlated with Q-max and PVR, and a comparison was made between the two groups. Results Group A had significantly larger TPV ( p = 0.03) and TZV/TPV ( p = 0.04) compared to Group B. VUA in Group A had a significant correlation with AUR ( p = 0.02). In Group B, both TZV/TPV and VUA had significant correlation with PVR and Q-max. A TZV/TPV cutoff ratio of 0.67 as a predictor of AUR had a 68% overall accuracy with sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of 88%, 53%, 44%, and 97%, respectively. VUA of < 90º as a predictor factor of AUR had a 67% overall accuracy with sensitivity, specificity, PPV and NPV of 88%, 50%, 44%, and 97%, respectively. Conclusion Morphological changes in BPH can be objectively quantified using ultrasound by TZV/TPV and VUA. These parameters may potentially serve as predictors of AUR in patients with BPH.

Urinary retention

Positive correlation

10.1186/s12301-022-00294-7

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Citations (2)

Diffusion-weighted MRI and urinary Activin-A are potential predictors of severity in neonates with hypoxic ischemic encephalopathy

Egyptian Pediatric Association Gazette (2017)

Sheren Esam Maher Abdel-Azeem El-Mazary Mohamed Gaber Eissawy Mahmoud M. Higazi Nagwa Ismail Okaily

Early diagnosis and treatment are important to reduce neonatal morbidity and mortality occurring from hypoxic ischemic encephalopathy (HIE). We aimed to correlate between urinary Activin-A and MRI (conventional and diffusion-weighted) and the degree of HIE according to Sarnat and Sarnat staging. Sixty full term neonates (37–42 weeks) selected from Minia University hospital for children from May 2014 to July 2016 were enrolled into the study. We measured urinary Activin-A using enzyme immunoassay and MRI using MRI scanner (Philips Achieva) and correlations between urinary Activin-A and MRI with the degree of HIE were done. Neonates with HIE had higher levels of urinary Activin-A than controls (P < .001) and it was positively correlated with the clinical grading of HIE at cutoff value of 0.08 µg/l on day-1 after birth with a sensitivity 98.2% and specificity 97.1% for prediction of HIE. DW-MRI detected HIE with a high sensitivity (85%) compared to the low sensitivity of conventional MRI (35%). Apparent diffusion coefficient (ADC) value of ≤0.8 was the best sensitivity-specificity cutoff point for detecting severe ischemic injury. DW-MRI imaging was positively correlated with the urinary Activin-A and both of them were positively correlated with the degree of HIE (P < .001). DW-MRI imaging is correlated well with urinary Activin-A in full-term neonates with HIE and both of them are correlated with the degree of HIE. Early determination of urinary Activin-A combined with DW-MRI imaging can early detect HIE and its degree of severity in full-term neonates with HIE.

Hypoxic-Ischemic Encephalopathy

10.1016/j.epag.2017.11.003

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Can Apparent Diffusion Coefficient Values Predict Time of Onset in Term Neonates with Hypoxic–Ischemic Injury?

Journal of Pediatric Neuroradiology (2016)

Mohamed Gaber Eissawy Sheren Esam Maher Mahmoud M. Higazi

Background Hypoxic–ischemic injury (HII) is a significant cause of neonatal morbidity and mortality. It had been postulated that apparent diffusion coefficient (ADC) abnormalities in term neonatal HII generally peak at 3 to 5 days after birth and subsequently “pseudonormalize” by the end of the first week. Thus, ADC values may provide a clue for timing of HII. Objective In this study, we sought to assess whether ADC values can always predict time of hypoxic ischemic insult. Methodology We prospectively analyzed 34 full-term neonates with suspected HII by diffusion-weighted (DW) magnetic resonance imaging (MRI) within 14 days after birth. DW images (DWIs) were assessed for areas of restricted diffusion at different locations that could be encountered in HII. ADC maps were generated and ADC values were calculated. Spearman correlation coefficient and receiver operating characteristic (ROC) curve analyses were performed. Results The mean age of neonates at time of MRI was 8 (±4) days (range: 2–14 days). No significant correlation detected between ADC values and age of neonates at time of imaging (p = 0.183; R2 = 0.06). ROC curve analysis showed that ADC values could not discriminate between neonates who were imaged early (≤7 days) or later (p = 0.391; area under the curve = 0.633). Conclusion ADC values may not be capable to accurately predict time of onset in term neonates with HII. ADC values should always be interpreted in combination with both conventional and DWIs, and each case should be individualized instead of generalization.

10.1055/s-0036-1597689

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MR Diffusion and MR Perfusion in Characterization of Ovarian Tumors; the Problem and the Solution

Indian Journal of Public Health Research & Development (2020)

Nadia F. El Ameen Mohamed Gaber Eissawy Laila Mohsen Omnia Mokhtar Nada Gerges M. Beshreda

Objective: To test and compare the sensitivity and accuracy of diffusion weighted imaging (DWI) and MR perfusion in women having ovarian tumors. Patients and Method: Fifty women with ovarian masses were collected after meeting the inclusion criteria depending on gray scale sonographic findings which suggested the presence of ovarian masses. Conventional MRI, Diffusion weighted imaging (DWI) and MR perfusion (MRP) were done for all patient cohort after the approval of ethical committee of our institution. The sensitivity and accuracy of the techniques were compared. Results : The surgical and pathological reports of our patients proved non tumorous lesion in three patients. They proved benign ovarian tumors in 18/47 (38.3%) patients, borderline tumors in 4/47 (8.5%) patients and malignant ovarian tumors in 25/47 (53.2%) patients. According to conventional MRI ovarian tumors could be diagnosed with sensitivity 92%, specificity 61.11%, PPV 76.7%, NPV 84.6% and accuracy 79.1%. DWI and MR perfusion showed the same results where they showed sensitivity 98%, specificity 83%, PPV 90%, NPV 98% and accuracy 93% with ADC cut off value 1x10-3mm2 /sec. Conclusion : Diffusion weighted imaging and MR perfusion are useful in diagnosis of ovarian tumors with approximately the same sensitivity and positive impact on the operative management.

10.37506/v11/i2/2020/ijphrd/195128

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