What is an overshoot on a CTG?
Decelerations can also have overshoots (transient increase in foetal heart rate following the ascending limb of a deceleration) that should not be mistaken for accelerations. Overshoots may indicate ongoing foetal hypotension and hypoxia secondary to intense and prolonged compression of the umbilical cord. 2.
What causes a variable deceleration?
Common causes of variable decelerations include vagal reflex triggered by head compression during pushing and cord compression such as that caused by short cord, nuchal cord, body entanglement, prolapsed cord, decreased amniotic fluid, and fetal descent.
What is a significant deceleration?
The definition of a significant deceleration was[10]: Variable decelerations reaching a nadir more than 60 beats per minute below the baseline and lasting longer than 60 seconds. Variable decelerations reaching a nadir of fewer than 60 beats per minute regardless of baseline and lasting longer than 60 seconds.
What does FMP mean on a CTG?
12. kPa. Figure 1 Hewlett-Packard M-1350-A cardiotocogram with fetal movement profile (FMP). movements as well as fetal heart rate; this would negate the need to record fetal movements by ultrasound, which is very time-consuming.
What is Dawes Redman?
Dawes Redman is an expert assistant for CTG interpretation however the final clinical judgement should be based on the entire clinical assessment. Normality is determined by a number of criteria set within the Dawes Redman system with the minimum duration of trace set at 10 minutes.
What are complicated variable decelerations?
Complicated variable decelerations may be indicative of fetal hypoxia. Decelerations occurring in the context of baseline bradycardia. Decelerations that drop ≤70bpm or last for ≥60 seconds. Page 8. Variable decelerations occurring in the context of Overshoots following the variable deceleration.
Are variable decelerations common?
Variable decelerations of the fetal heart rate are the most common changes noted during continuous fetal monitoring. In general, they are presumed to represent a normal response to fetal baroceptor stimulation.
What is a deceleration CTG?
Decelerations. Decelerations are an abrupt decrease in the baseline fetal heart rate of greater than 15 bpm for greater than 15 seconds.
How do you read a contraction chart?
When you’re looking at the screen, the fetal heart rate is usually on the top and the contractions at the bottom. When the machine prints out graph paper, you’ll see the fetal heart rate to the left and the contractions to the right. Sometimes it’s easier to read printouts by looking at them sideways.
What are the guidelines for interpretation and response to CTG patterns?
This document provides guidelines for clinicians in CTG interpretation and response to the CTG pattern of fetuses greater than 28 weeks gestation. It defines a standardised process of interpretation, documentation and management of cardiotocographs (CTG), in particular where variations from ‘normal’ occur.
What does a CTG show?
The CTG is a cardio-TOCO-graph. Attention must be paid to uterine activity as well as the fetal heart rate pattern. Uterine contractions reduce the blood flow to the placenta thus reducing fetal oxygenation Consideration must be given to the frequency of contractions with particular attention paid to the rest between them.
How do you read a CTG?
How to Read a CTG | CTG Interpretation | Geeky Medics. Early deceleration. Early decelerations start when the uterine contraction begins and recover when uterine contraction stops. This is due to increased Variable deceleration. Late deceleration. Prolonged deceleration. Sinusoidal pattern.
What are the CTG features prior to the prolonged deceleration?
The CTG features prior to the prolonged deceleration provide information on the oxygenation of the fetus prior to the onset on current insult (prolonged deceleration)