体外血栓形成试验影响因素的观察

FACTORS INFLUENCING EXTRACORPOREAL THROMBOTIC TEST

观察了五项 ＥＸＴ 测定中的影响因素，发现采血过程时间≥２４０秒时，ＥＸＴ 测定结 果差异显著（Ｐ＜０．０５０～０．０１０）；旋转时间为５分钟时，不能形成血栓，旋转时间为１０分钟时， 血栓形成不良；旋转时间≥２０分钟时，与１５分钟的ＥＸＴ差异显著（Ｐ＜０．０５）；旋转速度为３． ７ｒｐｍ时，不能形成血栓或血栓形成不良；实验温度为２５℃或４３℃时，ＥＸＴ结果与３７℃差异显 著（Ｐ＜０．０５０）；血栓形成后放置的时间≥１小时时，ＥＸＴ测定结果差异显著（Ｐ＜０．０５０～０． ００５）。

Five factors have been detected affecting the results of EXT. When blood sample time is ≥240 sec, the differences in EXT were statistically significant (P<0. 050-0. 010). When the rotating time was 5 minutes, thrombus did not well formed. When the rotating time was raised to 10 minutes, poor thrombus formation was observed, the EXT was statistically different from that of a rotating time of 20 to 30 minutes (P<0. 050). At a rotating speed of 3. 75 rpm, the thrombus was so poorly formed that EXT could not be performed. At the experimental temperatures of 25℃ and 43℃, EXT results were statistically different from those of 37℃'s. A statistically significant difference also existed when thrombotic lay up time exceeded 1 hour (P<0. 05-0. 005).