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Computed Tomography-based Classification of External Jugular Vein Confluence Patterns: Suitability as a Recipient

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Understanding external jugular vein (EJV) patterns is crucial for head and neck reconstruction. Preoperative imaging helps identify EJV confluence, ensuring suitable recipient veins for microvascular anastomosis and preventing surgical complications.

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Area of Science:

  • Anatomy
  • Vascular Surgery
  • Head and Neck Reconstruction

Background:

  • The external jugular vein (EJV) is a common recipient vessel in head and neck free flap reconstruction.
  • Significant variations in EJV branching patterns impact its surgical utility.
  • Classifying EJV confluence is vital for successful microvascular anastomosis.

Purpose of the Study:

  • To classify external jugular vein (EJV) confluence patterns using preoperative imaging.
  • To assess the suitability of the EJV as a recipient vein in head and neck reconstruction.
  • To correlate EJV confluence patterns with potential surgical limitations.

Main Methods:

  • Retrospective observational study of 100 contrast-enhanced computed tomography scans.
  • Analysis of patients undergoing head and neck reconstruction (April 2022 - November 2022).
  • Categorization of EJV confluence into four types: subclavian vein (SCV), venous angle, internal jugular vein (IJV), and absence of EJV.

Main Results:

  • EJV drained into the SCV in 47% of cases.
  • The venous angle was the confluence point in 37% of cases.
  • 11% drained into the IJV and 5% had no EJV, with up to 16% deemed unsuitable for anastomosis due to IJV involvement or absence.

Conclusions:

  • Preoperative imaging is essential for confirming EJV confluence patterns before head and neck reconstruction.
  • Identification of EJV confluence is critical, especially when IJV resection is planned.
  • Alternative recipient veins should be prepared for cases with unsuitable EJV or IJV patterns to prevent intraoperative complications.