Browsing by Author "Yimam Ali"

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    Assessment of Dissatisfaction, Refusal and Associated Factors after Spinal Anaesthesia for Elective Surgical Procedures in Public Hospitals in Addis Ababa, Ethiopia, 2020/2021, A Cross Sectional Study
    (Addis Abeba University, 2021-06) Yimam Ali; Seifu Ashenafi
    Background: Spinal anaesthesia is the most common type of regional anaesthesia technique which helped for a wide range of surgical procedures. Patient satisfaction with anaesthesia care is important to monitor the quality of anaesthesia delivery system. It is important to identify the reasons and the risk factors for patients’ dissatisfaction and refusal after spinal anaesthesia for continuous improvement of quality of anaesthesia services. Objectives: The aim of this study was to assess the dissatisfaction, refusal and associated factors after spinal anaesthesia for elective surgical procedures in public hospitals in Addis Ababa, Ethiopia,2020/2021. Methods: A multicentre cross-sectional study was conducted from December 30 to April 14,2020/2021, in selected public hospitals in Addis Ababa, Ethiopia. A total of 227 patients older than 18 years old scheduled for elective surgery under spinal anaesthesia were incorporated in the study.A five point likert scale was used to assess patients preoperative, intraoperative, and postoperative satisfaction level of anaesthesia service. Both bivariate and multivariate logistic regressions were used to measure association of predictor and outcome variable at 95% CI using adjusted odds ratio.P value <0.05 was used to declare statistical significance. Results: A total of 227 patients included in this study and overall proportion of patients who were satisfied with spinal anaesthesia was 150 (66.1%). Risk factors of dissatisfaction were backache (AOR=4.73, 95%CI=1.97, 11.36), headache (AOR=3.68, 95%CI=1.54, 8.80), and intraoperative nausea &vomiting (AOR=3.33(1.43, 7.73). 188(83%) of patients would choose spinal anaesthesia again whereas 39(17%) would refuse to undergo spinal anaesthesia in the future and its risk factors were intraoperative pain, fear of awareness and backache. Conclusion and recommendation: Patients satisfaction towards spinal anaesthesia was very low in our setup compared to many other previous studies. Backache, headache and intraoperative nausea and vomiting were risk factors which results patients dissatisfaction.Explaining the benefits and risks of anaesthesia, and understanding the patient’s opinion is essential to increase satisfaction with anaesthesia service.
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    Evaluation of the Nature of Porosity in Carbonate Rock Of Hamanlei Formation, Ogaden Basin, Ethiopia: Implications For Prediction of Reservoir Quality
    (Addis Ababa University, 2023-06) Yimam Ali; Solomon Kassa (PhD)
    The Ogaden basin is the largest sedimentary basin in Ethiopia having 350,000 km2 areal coverage. It is also the most studied sedimentary basin in Ethiopia. Nonetheless, the amount of data gathered from this baisn is not enough to better comprehend the petroleum system of the basin. The Hamanlei carbonate rock in the basin makes good reservoir rock. The nature of this reservoir rock is complex owing to various factors. Despite detail studies were conducted to understand the reservoir property, particularly core and wireline log study, further studies are needed for better characterization of this reservoir rock. To further characterize the reservoir property, i.e. porosity, of this rock and prediction for reservoir quality, petrographic and image analysis were performed. The outcome of this study provides valuable insights into the mineralogy and texture of the studied rocks. Furthermore, it highlights the importance of understanding the different pore types that enables to better interpret the reservoir quality and potential flow characteristics of the studied rocks. Generally, the porosity value of the reservoir rock is too small which is caused by the dominant proportion of matrix and cement