voa慢速英语:Feeling No Pain: The World of Anesthesia

发表时间:2008-11-26内容来源:VOA英语学习网

This is the VOA special english Health Report.

Anesthesia is used during operations and other medical procedures to block pain signals from traveling through the nervous system. The kind of anesthesia that patients receive depends on their condition and the kind of procedure they need.

Local anesthesia is used to make a small area of the body lose feeling. Usually, local anesthesia is for minor procedures, like fixing a tooth or closing a wound. The person remains fully awake.

Regional anesthesia is used to block pain in a large area of the body. For example, when a woman is giving birth, she might request an epidural anesthesia. It is injected into the fluid in the spine. It acts on the lower half of the body.


A patient in Honduras is placed under general anesthesia for an operation on his hand


General anesthesia makes a person fall asleep. This is known as being "put under." The drugs are injected into the blood or breathed as gas. General anesthesia also blocks memory.

People are not supposed to remember an operation when they wake up. In rare cases, they do. The Mayo Clinic says patients may have a sense of their surroundings during about one-fifth of one percent of all operations. It says they generally do not feel pain, but may wish to talk to a mental health provider if the memories trouble them.

An anesthesiologist is a doctor specially trained to give anesthesia. During an operation, the anesthesiologist will observe the patient's heart rate, blood pressure and amount of oxygen in the blood. A breathing tube may be put into the person's windpipe. The tube is connected to a respirator machine.

There are, of course, risks to anesthesia. People can have different reactions to the drugs. Mistakes can happen. But medical experts say the safety of anesthesia has greatly improved.

The Mayo Clinic says not too long ago, one in ten thousand cases resulted in death. Now, it says, the number is one in two hundred fifty thousand.

The experts say everyone's experience with anesthesia is different. To reduce the risks, the Mayo Clinic says open communication is important among the patient and the doctors before an operation.

Patients can expect questions like: What is your current health? What medications do you take? Do you smoke or drink alcohol? Do you know if you have any allergies to foods or medicines? And what experiences have you had in the past with anesthesia?

And that's the VOA special english Health Report, written by Jill Moss. Our reports are online at tingvoa.com. I'm Bob Doughty.

参考中文翻译:


麻醉应用于手术或者其他医疗程序中以组织疼痛信号传向神经系统。病人所需麻醉的种类取决于他的身体状况和所需手术的类型。

局部麻醉用来使身体的一小部分失去感觉。通常,局部麻醉应用于比较小的手术,比如换牙或者缝合伤口。病人仍然是清醒的。

区域麻醉使身体比较大的区域免于疼痛。比如,一个女人生产的时候,她可以要求硬膜麻醉。麻醉剂被注射到脊柱内的液体中,作用于身体的下半部分。

全身麻醉使人进入睡眠状态。药物被注射到血液中或者以气体的形式吸入体内。全身麻醉同时也会阻断记忆。

当病人醒来时,除了少数几个案例,病人都不记得手术。梅奥诊所说,大约有五分之一的人在手术中能够感知到周围的环境。病人基本上感觉不到疼痛,但是如果该记忆给他们造成困扰,他们愿意找心理健康医生。

麻醉师是专门训练来给病人实施麻醉的医生。在手术过程中,麻醉师会观察病人的心率,血压和血液含氧量。医生会在病人的气管中插入一根呼吸管,与呼吸器相连。

当时,麻醉也有危险。人们对药物有不同的反应。有时会有错误发生。但是医学专家说,现在麻醉的安全性已经大大的提高了。

梅奥诊所说,不久之前,万分之一的案例中病人会死亡。现在,该数字已经降低到二十五万分之一。

专家说,每个人对麻醉的经历都不同。为了降低风险,梅奥诊所说,手术之前医生与病人之间进行开明的沟通是非常重要的。

病人可能会遇到这样的问题:你目前的健康状况?现在服什么药?是否吸烟饮酒?是否对某些食品或药物过敏?过去有什么麻醉的经历?


背景资料:

麻醉常见的问题

我可以选择麻醉医生么?

这个问题是病人希望医学专家给自己治疗时经常问的问题。许多人是通过别人或其他医生介绍,当然你可以自己选择麻醉医生。当然你必须事先和你的麻醉医生联系,以便医生安排。如果病人未和医生预先联系,将由麻醉科主任安排某一个医生来给你麻醉。

都有什么麻醉方法?

主要有三种麻醉方法:全身麻醉、区域阻滞麻醉、局部麻醉。每一种都有很多形式和用途。

病人可以要求采用何种麻醉。

可以,一些手术可以采用多种麻醉方法,麻醉医生在了解情况之后,将会告知采取何种麻醉方法,如何麻醉、对你有何影响,如果你对某种麻醉有自己的看法,可以和医生讨论,虽然医生的看法是专业性的,他还是会考虑病人的意见,以便制定有效的计划。

关于全身麻醉—到底怎么回事?

全麻由三个过程,分诱导、维持、恢复阶段。麻醉前先建立静脉通路,相应监测仪的连接。作出麻醉前生命体征的评价。

来自:VOA英语网 文章地址: http://www.tingvoa.com/html/20081126/101.html