To decrease the amount of bleeding,the operators can anesthetize the nasal mucosa with 1% ephedrine and tetracaine,then add 1% tetracaine to 30ml adrenalin.

• 为减少术中出血 ,可将副肾素的用量增至5mg ,术前先用 1%25麻黄素丁卡因棉片麻醉鼻腔黏膜 ,然后将 1%25丁卡因 30ml加入副肾素 5mg浸注棉片麻醉黏膜 ,促使黏膜内血管收缩减少循环血量。