问题 单项选择题

患者男,68岁。临床诊断胃窦癌。既往有高血压病史8年,长期口服抗高血压药。术前测血压170/100mmHg,心率84次/分。心电图:电轴左偏,心脏顺钟向转位。X线胸片:心脏增大。在静吸负荷麻醉下行胃窦癌根治术,诱导后当异氟烷浓度达1.6MAC时,血压降至95/50mmHg,心率为118次/分,ECG出现多个室性期前收缩。

诱导后发生低血压最可能的原因是

A.吸入麻醉过深,心血管受抑制
B.血容量不足,回心血量少
C.麻醉药物选择不当
D.急性心衰
E.脑血管意外

答案

参考答案:A

解析: 全麻并发症包括低血压,是指麻醉期间收缩压下降超过基础值的30%或绝对值低于80mmHg者。多由于麻醉过深,心血管受抑制导致血压下降、脉压变窄。故答案应选A。

阅读理解

阅读理解

     The Golden Gate Bridge joins the beautiful city of San Francisco with suburbs(郊区) to the north. Each day,

about one hundred thousand cars cross the bridge, taking people to and from the city. More than half of them

cross the bridge during the morning and evening rush hours, as a result, the trip is not pleasant.

     Now, however, there is at least one group of happy commuters(经常往返者). These are the people who travel

under the bridge instead of on it. They go to work by boat and enjoy it so much that most of them say they will

never go by car again.

     The boat they take is the large, quiet, comfortable "Golden Gate". Commuters can enjoy the sun on the boat.

In the morning they can have breakfast in the coffee shop, and in the evening they can have a drink in the bar

while they are looking at San Francisco's famous scene and the nearby hills.

     The trip only takes thirty minutes and is not expensive. But best of all, being on a boat seems to make people

feel more friendly towards each other. Two commuters who met on the "Golden Gate" have already got married.

     Because the boat had been so successful, there are plans to use other, still larger boats. There is also a plan

for a high-speed boat that will make the trip in only fifteen minutes. Not everyone is happy about that. "A lot of

people don't want to get the trip faster," said one commuter, "They feel that an hour is just enough to rest."

1. Crossing the Golden Gate Bridge by car is not pleasant because ________.

A. it takes people 30 minutes

B. the Golden Gate Bridge is very long

C. the bridge is crowded with bikes, cars, buses and trucks all the time

D. most of the car owners can not enjoy the beauty of San Francisco

2. In the future, ________.

A. larger boats will be used to carry commutes

B. a big coffee shop will be built

C. more and more people will get married on the boat

D. people will all go to work by boat

3. Many people don't like the new idea for a high-speed boat because ________.

A. they don't want to go to work earlier

B. they like to stay on the boat

C. there will be more people on the boat

D. they won't have enough time to rest

多项选择题