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进行鼻咽部血管纤维瘤手术治疗时,术前结扎颈外动脉帮助不大,因肿瘤已有广泛的侧支循环,术中出血不见减少。低血压麻醉使收缩压降至40～60毫米汞柱,或有效果。有些作者建议术前作雌激素治疗,据报告3例经治疗后,血管造影显示血管减少。Jafek等(1973)报告9例术前用雌激素治疗者.平均失血量为1970毫升;25例未用雌激素治疗者,平均失血量为2960毫升。冷冰治疗或有辅助作用,对小的复发瘤较有效。术前血管内造栓法效果较好,因可阻塞动脉
Nasopharyngeal angiofibroma surgery, preoperative ligation of the external carotid artery is not helpful, because the tumor has a wide range of collateral circulation, bleeding was reduced. Hypotensive anesthesia to systolic blood pressure down to 40 ~ 60 mm Hg, or effective. Some authors recommend preoperative estrogen therapy and 3 have reported angioembolism after treatment. Jafek et al. (1973) reported 9 patients treated with estrogen preoperatively, with an average blood loss of 1970 ml. In 25 patients without estrogen therapy, the mean blood loss was 2960 ml. Cold treatment or ancillary effects of small recurrence of tumor more effective. Preoperative intravascular thrombosis method is better, because of blocking the artery