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下列哪些情况对灌注压的监测有影响()

发布日期:2021-05-11

下列哪些情况对灌注压的监测有影响()
A

是否校零

B

测压部位

C

穿刺针的方向

D

换能器的位置

E

动脉流量

试题解析

换能器

换能器,是指电能和声能相互转换的器件。在回声测深仪、多普勒计程仪和声相关计程仪中使用。将电能转换成声能的称为发射换能器;将声能转换成电能的是接收换能器。发射和接收换能器通常是分开使用的,但也可以共用一个。换能器的主要性能指标有:工作频率、频带宽度、电声频度、谐振频率时的阻抗、指向性(发射波束宽度)和灵敏度等。按物理特性和使用材料的不同,换能器可分为两类:磁致伸缩换能器和电致伸缩换能器。前者应用铁磁材料的磁致伸缩效应,常由镍或镍铁合金制成;后者应用电致伸缩效应和压电效应,常由钛酸钡陶瓷和铣钛酸铅陶瓷等介质电材料制成。换能器安装于船底,其指向性可用波束宽度或半扩散角来表征。

中文名
换能器
别名
有源传
类别
磁致伸缩
外文名
energy converter
运用领域
超声波设备
性能参数
共振频率

针的

针的 [1] 是于2020年在中国商标网注册成立的一个品牌;经营范围:计量仪表; 测微规; 测量仪器; 测量装置; 测量器械和仪器; 精密测量仪器; 齿轮测量工具; 刀具测量工具; 螺丝攻规;

中文名
针的

部位

部位,汉语词语,拼音是bù wèi,意思是面目或人体某部分的位置;事物整体中部分的位置;行列,次序。

中文名
部位
释义
面目或人体某部分的位置
拼音
bù wèi
出处
《潜夫论·相列》

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此试题出现在

麻醉科住院医师

麻醉学亚专业

去刷题
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