To determine whether sacrifice of the internal jugular vein (IJV) causes subsequent changes in the jugular bulb.Study Design
Retrospective chart review.Setting
Tertiary referral center.Patients
Patients were selected by CPT code for neck dissection and were included in the study if they had undergone unilateral neck dissection and had preoperative and postoperative computed tomographic scans through the temporal bone.Interventions
The jugular bulb was measured in the axial plane for anteroposterior and mediolateral diameters.Main Outcome Measures
Cross-sectional area of the jugular bulb was calculated, and comparison was made between preoperative and postoperative studies in patients with or without ligation of the IJV.Results
After unilateral neck dissection, the mean change in the size of the jugular bulb ipsilateral to surgery with sacrifice of the IJV was found to be −10.4 mm2 (95% confidence interval [95% CI], ±8.54 mm2); ipsilateral to surgery without sacrifice of the internal jugular, −0.2 mm2 (95% CI, ±3.24 mm2); contralateral to surgery with sacrifice of the IJV, +1.9 mm2 (95% CI, ±11.12 mm2); and contralateral to surgery without sacrifice of the IJVa, +1.0 mm2 (95% CI, ±2.66 mm2). Analysis of variance demonstrated a significant difference for changes in the jugular bulb area ipsilateral to surgery with sacrifice of the IJV (p = 0.03) when compared with contralateral to surgery without sacrifice of the IJV.Conclusion
Changes in size of the jugular bulb occur with surgical manipulation of the jugular vein. This study demonstrates a decrease in the size of the jugular bulb with ipsilateral IJV sacrifice.