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Ultrasound Mapping of the Anatomical Relationship Between the Right Internal Jugular Vein and Carotid Artery
Sponsor: Ankara City Hospital Bilkent
Summary
This prospective observational study will describe the anatomical relationship between two major blood vessels on the right side of the neck: the internal jugular vein and the common carotid artery. These vessels lie close together, and their relative positions are relevant when placing a central venous catheter. The study will enroll 200 adults undergoing elective cardiac surgery at Ankara Bilkent City Hospital who require right internal jugular vein catheterization as part of their routine care. A single ultrasound image will be recorded for each participant under standardized conditions after general anesthesia and before catheter placement. Computer-assisted image analysis will determine the angular position of the artery around the center of the vein on a 0°-360° scale. The study will describe the distribution of these angles and their frequencies within eight anatomical sectors. The findings may provide a more detailed quantitative description of neck vascular anatomy and support future research on ultrasound-guided central venous access. Participation will not alter routine anesthesia or catheterization management.
Official title: Ultrasonographic Angular Mapping of the Anatomical Relationship Between the Right Internal Jugular Vein and Carotid Artery: A Prospective Observational Study
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
OBSERVATIONAL
Enrollment
200
Start Date
2026-10-27
Completion Date
2027-01
Last Updated
2026-10-23
Healthy Volunteers
No
Interventions
Standardized Ultrasound Imaging and Computer-Assisted Angular Mapping
A single transverse ultrasound image of the right internal jugular vein and common carotid artery will be recorded at the cricoid cartilage level after induction of general anesthesia and endotracheal intubation, before routine central venous catheterization. Imaging will be performed in 15° Trendelenburg with approximately 30° leftward head rotation and a positive end-expiratory pressure of 5 cmH2O, using minimal transducer pressure. Vessel centers will be manually marked on de-identified images using custom software, which will automatically calculate the angular position of the artery center relative to the vein center on a 0°-360° scale. This is an observational imaging and analysis procedure; routine anesthesia and catheterization management will not be altered.
Locations (1)
Ankara Bilkent City Hospital
Ankara, Ankara, Turkey (Türkiye)