Reza Aminizadeh - Department of Emergency Medicine, Kerman University of Medical Sciences, Kerman, Iran
Amirhossein Mirafzal - Department of Emergency Medicine, Redcliffe Hospital, Redcliffe, Queensland, Australia.
Mansoureh Fatahi - Department of Emergency Medicine, Shahid Beheshti university of medical sciences ,Tehran, Iran
Maryam Mohammadi - Emergency Medicine specialist, Mehrgan Hospital, Kerman, Iran.
Maryam Ziaei - Department of Emergency Medicine, Faculty of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran.
Mahdi Foroughian - Department of Emergency Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.

Background: Without mastering Central Venous (CV) Line placement skills, medical graduates will not have sufficient clinical competence to perform this sensitive procedure. The level of proficiency in each repetition of any skill, such as CV Line, can be checked and recorded by means of a learning curve. Method: This article was cross-sectionally conducted in ۸۰ emergency medicine resident students. In order to collect data, a checklist was used to measure the level of proficiency in installing CV Line, according to the experts and available sources, after each time performing the skill and recording observations and before performing this skill again (with an interval of ۱-۳ days), The student's proficiency score was calculated by the emergency medicine assistant out of ۱۰۰ and recorded in the learning curve, and this process continued until reaching the clinical proficiency stage, that is, reaching a smooth line in the learning curve. Then all the data were recorded and subjected to statistical analysis. Results: The results showed that there was a significant difference between the average scores of clinical skills in five stages. The clinical skill level scores in the first time (۱۳/۲۹) were significantly lower than the clinical skill level scores in the second, third, fourth and fifth time, and overall, the clinical skill level scores and the ability to do work increased over time. Conclusion: After five times performing the CV Line embedding, the students will reach clinical proficiency in doing it.

Central Venous, Emergency Medicine, Residents.