【用戶】霸氣阿宏

【年級】小二上

【評論內容】沒有positive與negative，只有reactive與non-reactive。Reactive tests — The NST is reactive from 32 weeks to term if there are two or more fetal heart rate accelerations reaching a peak of at least 15 beats per minute (bpm) above the baseline rate and lasting at least 15 seconds from onset to return to baseline (15 x 15) in a 20-minute period (figure 2 and table 1) [6,13,20]. A reactive test provides reliable evidence of normal fetal oxygenation, regardless of the length of observation time needed to demonstrate reactivity [21].The optimal duration of the NST has not been established. Some s...