Abstract Critically care nurses must be competent in care of patients with COVID19 on mechanical ventilation which meets the specialized needs of the patient. Aim: To investigate nurses' level of competence and reported practices among ventilated adult and pediatric patients with COVID 19. Research Design: A descriptive research design was conducted in this study. Setting: The study was conducted in four intensive care units include general, trauma, critical care and pediatric intensive care unit. Subjects: Nurses who have a bachelor’s degree of nursing sciences as a bedside nurse and dealing with patients connected to mechanical ventilation with COVID 19. Tools of data collection: Tool I: clinical scenario assessment tool. Tool two: nurses' reported practices (universal precautions) questionnaire. Results: The majority of nurses were incompetent in all breath types and lung pathological changes (81.7%, 95%, 81.7% 95.0%) respectively, and majority of them had inappropriate reported practice according to policy of sharp equipment and environmental precaution Conclusion: It was found that more than half of studied nurses were incompetent and had inappropriate reported practice in dealing with ventilated patients with covid19. Recommendation: Nurses' level of competence and practices among ventilated patients should be assessed at regular time

Keywords:Adult and Pediatric Patients,Level of Competence,Covid 19,Level of Competence,Mechanical Ventilation & Reported Practices.