摘要
目的：观察心内直视手术期间及术后血液流变学的变化。方法：分别在麻醉前、转流前、转流后１０ｍｉｎ、心脏复跳后１０ｍｉｎ、停转后１０ｍｉｎ及术毕３ｈ测定Ｈｃｔ、血沉、血浆粘度、全血高、中、低切粘度、全血还原高、低切粘度。结果：全血高、中、低切粘度、血浆粘度及Ｈｃｔ在转流期间及复跳后１０ｍｉｎ显著下降（Ｐ＜０．００１）。其他指标无明显变化。结论：心内直视手术期间体外循环对全血粘度、血浆粘度及Ｈｃｔ有显著影响，对血沉及全血还原粘度影响不大。
Objective:To study the diagnostic ultrasound influencing on electrocardiogram(ECG) of normal adults.Methods:Normal younths were radiated with a ultrasonic intersity of 0.2 W/cm 2 on the ventricular area.The ECGs of every individual including before radiation,on radiation and after radiation were recorded,measured and compared respectively.Results:Compared with the before radiation,the peaks of the R and S waves of limb lead in any body were obviously enlarged at the time of 90 s( P <0.01).The waves of P and T of the same lead had not markedly changed( P >0.05).After ultrasomic radiation was stopped,the enlarged R and S wavcs could gradually recocer to the level before radiation. Concluslon:Diagnostic dosage ultrasound may result in the temporary change of wave amplitude of ECG.So the examinating time of heart ultrasound should be shortened as far as possible.
出处
《中国医学物理学杂志》
CSCD
1999年第2期123-124,共2页
Chinese Journal of Medical Physics
关键词
体外循环
心脏手术
血液流变学
ultrasound
electrocardiogram(ECG)
limb lead
S Wave
R Wave
