问:我是一名离休干部,今年75岁,是贵刊的老读者。最近因牙病到当地口腔医院看门诊,医生告诉我需要拔去一颗病牙。我患有高血压,心脏也不太好,年龄大了又怕疼,心里顾虑重重。后来听说可进行“无痛监护拔牙”,特请编辑部为我咨询有关方面的详细情况:什么是无痛监护拔牙?术前应做什么准备?谢谢! Q: I am a retired cadre. I am 75 years old this year and I am an old reader in your magazine. Recently due to dental visit to a local dental clinic, the doctor told me the need to pull a diseased tooth. I suffer from high blood pressure, the heart is not too good, older and afraid of pain, my heart worried. Later I heard that “painless monitoring extraction”, please edit the Department for the consultation I asked the details: What is painless monitoring of tooth extraction? Preoperative should do what? Thank you!