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Background and Aim This study aimed to investigate the demographic and clinical information of patients undergoing surgery with ultrasound in internal jugular vein cannulation. Methods & Materials After the approval of the plan in the ethics committee of Guilan University of Medical Sciences, this study was performed in the general surgery department of Razi Hospital in 2018 on 100 patients in need of central venous catheter implantation. The neck type (distance between the two designated areas) was entered in a special form made by the researcher and after the completion of the design, it was examined and statistically analyzed. Ethical Considerations This research ethically approved by the Ethics Committee of Guilan University of Medical Sciences (Code: IR.GUMS.REC.1396.20) Results The mean age of the studied patients was 58.72±16.09 years. The anatomical and sonographic margins between the two Land Mark areas were higher in men VS women, but there was no statistically significant difference (P>0.05). However, there was no statistically significant difference between the other variables. (P>0.05). Conclusion The findings of this study show that catheterization of the internal jugular vein under the guidance of ultrasound was less access time and fewer complications. [ABSTRACT FROM AUTHOR]

Objective: Accurately localizing the mental foramen and mandibular canal is important when administering local anesthesia and performing surgery; therefore, knowing the normal range of the possible locations is essential. Our purpose was to assess the location of the mental foramen and mandibular canal in an Iranian population using panoramic radiography. Materials and Methods: Standard panoramic radiographies were performed. The positions of 100 mental foramens were evaluated. The distances from the center of the mental foramen to the superior and inferior borders of the mandible and to the apexes of the first and second premolar were measured. The distance of the mental foramens from the mandibular midline and the diameter of the mandibular canal in the mental foramen connection were also measured. Results: Among 100 mental foramens, 6% were positioned under the first premolar, 24% were between the first and second premolars, 67% were under the second premolar, and the remaining 3% were behind the second premolar. The mean distance from the mental foramen to the mandibular midline was 27.77±3.20 mm. The mean diameter of the mandibular canal in the mental foramen connection was 3.09±0.69mm. Conclusion: The mental foramen was near the second premolar and the inferior border of the mandible. This information can be used to perform safer mental nerve blocks in surgical interventions. [ABSTRACT FROM AUTHOR]