Abstract:Objective To investigate the efficacy and safety of the great saphenous vein in carotid resection for malignant tumor invasion.Methods This retrospective study included patients who underwent head and neck surgery at the Cancer Hospital of the Chinese Academy of Medical Sciences from November 2017 to September 2019. In particular, this study focused on 18 patients of carotid artery malignant tumor invasion, including 10 males and 8 females, aged 47-72(58.8±6.6)years. Among the patients, 11 patients had papillary thyroid cancer and seven patients had squamous cell carcinoma of head and neck, where five of them underwent radiation therapy before surgery. Combined with a comprehensive preoperative examination, the surgeries comprised the complete removal of the tumor and part of the carotid artery and the reconstruction of the vessel with the autologous saphenous vein. Low-molecular-weight heparin was given after surgery, and computed tomography (CT) angiography and CT were regularly reviewed. The patients were observed with preoperative cervical ultrasound and CT prompt neck round Angle, lower limb venous ultrasound prompted by the great saphenous vein and far away from hui in vein heart to carry 5 cm in diameter, operation time, intraoperative blood loss, not by the side of great saphenous vein transplantation, donor great saphenous vein length, tumor and carotid artery block time package RaoGeng Angle, receptor carotid arterial anastomosis inner diameter, histologic examination results, patients' length of hospital stay, postoperative reconstruction flow situation of the blood vessels, presence of complications in the nervous system and the lower limbs for area, with or without local recurrence and distant metastasis patients during the follow-up period.Results Preoperative ultrasound exploration and neck CT showed that the internal diameter of the great saphenous vein in 18 patients was (0.53±0.14) cm at 5 cm from the distal end of the portal vein. CT scan of the neck showed that the wrapping angle of the tumor to the carotid artery were more than 180°, among which 15 patients were more than 270°, and 9 patients were all wrapped around the carotid artery. The length of saphenous vein was (7.3±1.1) cm. Nine patients were selected from the left great saphenous vein and 9 patients from the right. The proximal carotid anastomosis sites were all common carotid arteries with an internal diameter of (0.74±0.06) cm. The distal anastomosis was located in the common carotid artery in 14 patients and the internal carotid artery in 4 patients, with the internal diameter (0.71±0.17) cm. The time of intraoperative carotid artery occlusion was (640±117) s. The intraoperative invasion angle of carotid artery was observed at 190°- 360° (317°±56°), which was consistent with the preoperative imaging examination. The operation time of 18 patients ranged from 4 to 6 hours, the intraoperative hemorrhage ranged from 200 to 500 mL, and the hospitalization time ranged from 7 to 28 days (mean 13.13 days).Postoperative pathology indicated 13 patients of invasion of carotid vascular wall tissue. The average follow-up time was 11.06(3-24) months. Among the 18 patients, 2 died, and 1 experienced local recurrence, and the remaining 15 survived without tumor. Postoperative carotid artery CT angiography showed that all the reconstructed vessels were unobstructed. No graft vessel rupture, infection, stenosis, and pseudoaneurysm formation were found in all patients during the follow-up period. No edema, claudication, and other complications of blood circulation disorders were observed in the lower limbs of the donor area. Conclusions The autologous great saphenous vein can be used as a donor for carotid artery reconstruction in the surgical treatment of head and neck malignant tumors. Therefore, it is suitable to be widely used because of its easy sampling, low graft infection rate, and low risk of neurological complications.
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