İHSANİYE SÜER DOĞAN, NEZİH KAVAK
Anatolian Current Medical Journal - 2025;7(4):529-534
Aims: The study aimed to assess the variation in femoral vein diameter and cross-sectional area (CSA) across different body positions in a cohort of healthy Turkish adults and to explore the associations between venous measurements and demographic variables, including age, sex, and body-mass index (BMI). Methods: Ultrasonographic measurements of the right and left femoral vein diameters and CSA were obtained in five distinct body positions from 278 healthy adults, encompassing a total of 556 lower limbs. Demographic parameters, including age, sex, and BMI, were systematically documented for each participant. Results: A total of 278 participants (556 limbs) were analysed. Males exhibited significantly higher femoral vein CSA than females across all positions (p<0.001). The lowest mean CSA was in the Trendelenburg position (0.87±0.08 cm²), and the highest in the reverse Trendelenburg+frog-leg position (1.51±0.11 cm²) (p<0.001). CSA positively correlated with age in all positions except Trendelenburg (r=0.400–0.479, p<0.001). Overweight and obese (class I) individuals showed significantly higher CSA values than normal or underweight participants (p<0.001). Conclusion: This study demonstrates that body positioning significantly affects the CSA of the femoral vein. Additionally, factors such as age, sex, and BMI were found to significantly influence femoral vein calibre.
