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Cardiotocography (CTG) is used during pregnancy to monitor fetal heart rate and uterine contractions.
ย For our first installment, we are going to look at the tracing paper used for Fetal Monitoring.
ย A quick look at the ECG paper and Fetal Monitor paper. They look very similar. However, this couldnโt be farther from the truth.
ย ๐๐๐ ๐๐ซ๐๐๐ข๐ง๐ ๐๐๐ฉ๐๐ซ
ECG Tracing paper is one of the first things you learn about in cardiology. We are taught that each small block equals .04 sec or 1mm wide and they are 1mm tall. One Big block (containing 5 small boxes) equal .20 secs or 5mm wide and 5mm tall.
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We learn that the time in between the Hash marks at the top of the paper represent 1 second ***some tracing paper only have hash marks to show periods of 3 seconds. We use at least a 6 second strip to evaluate and ECG.
ย The ECG is printed at ๐๐ ๐ฆ๐ฆ/๐ฌ๐๐.
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๐ ๐๐ญ๐๐ฅ ๐๐จ๐ง๐ข๐ญ๐จ๐ซ๐ข๐ง๐ ๐๐๐ฉ๐๐ซ
Each small boxes equals 10 seconds wide and 10 BPM (heart rate) high. The time between the dark red vertical lines equals 1 minute (6 small boxes).
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The Fetal Monitor prints at ๐ ๐๐ฆ/๐ฆ๐ข๐ง.
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๐๐ก๐ฒ ๐๐ซ๐ ๐ญ๐ก๐๐ฒ ๐ฌ๐จ ๐๐ข๐๐๐๐ซ๐๐ง๐ญ? ๐๐ซ๐๐๐ญ ๐ช๐ฎ๐๐ฌ๐ญ๐ข๐จ๐ง!!
With Fetal Monitor, you are focused more on a trend (data overtime). Conversely, with an ECG, you are usually focused on small specific periods of time rather that long periods of time for treatments.ย With an ECG you need to be able to evaluate the specific structure of the waveform of each beat/impulse. In FHM, you donโt need to monitor each beat/waveform.
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