What causes sinusoidal FHT?
What causes sinusoidal FHT?
SINUSOIDAL PATTERN It indicates severe fetal anemia, as occurs in cases of Rh disease or severe hypoxia.
What does sinusoidal FHR mean?
described an undulating wave form alternating with a flat or smooth baseline fetal heart rate (FHR) in severely affected, Rh-sensitized and dying fetuses. This FHR pattern was called ‘sinusoidal’ because of its sine waveform. Subsequently, Modanlou et al.
What does a sinusoidal CTG mean?
A sinusoidal pattern is an oscillating pattern which is typically smooth and regular. It has a relatively fixed period of 2-5 cycles per minute and has an amplitude of between 5 and 15 bpm around the baseline rate. Baseline variability is absent and there are no accelerations.
What is considered a decel in pregnancy?
Decelerations are temporary drops in the fetal heart rate. There are three basic types of decelerations: early decelerations, late decelerations, and variable decelerations. Early decelerations are generally normal and not concerning. Late and variable decelerations can sometimes be a sign the baby isn’t doing well.
What is sinusoidal used for?
In 1822, French mathematician Joseph Fourier discovered that sinusoidal waves can be used as simple building blocks to describe and approximate any periodic waveform, including square waves. Fourier used it as an analytical tool in the study of waves and heat flow.
Which drug is not recommended in pregnancy?
Some of the over-the-counter medicines that increase the chances of birth defects are: Bismuth subsalicylate (such as Pepto-Bismol). Phenylephrine or pseudoephedrine, which are decongestants. Avoid medicines with these ingredients during the first trimester.
Can you have decelerations without contractions?
Variable decelerations have no fixed time relationship to uterine contractions. Therefore, the pattern of decelerations changes from one contraction to another. Variable decelerations are usually caused by compression of the umbilical cord and do not indicate the presence of fetal distress.
Is a sinusoidal pattern Category 3?
NICHD Category III (CIII) fetal heart rate tracing (FHR) is defined as having either sinusoidal pattern or absent baseline variability plus recurrent late decelerations, recurrent variable decelerations, or bradycardia.
What can I do with late Decels?
Late decelerations treatment and management
- Lie down in the left lateral, knee-chest, or right lateral position to relieve compression of the large vein (or vena cava) by your pregnant uterus.
- Your doctor might administer oxygen in response to late decelerations.
What are pseudopseudo-sinusoidal FHR patterns?
Pseudo-sinusoidal FHR patterns include all patterns in which undulatory waveforms, or regular FHR baseline oscillations of constant amplitude, alternate with episodes of normal baseline variability or activity [ 13 ].
What is sinusoidal fetal hemorrhage (FHR)?
This FHR pattern was called ‘sinusoidal’ because of its sine waveform. Subsequently, Modanlou et al. described SHR pattern associated with fetal to maternal hemorrhage causing severe fetal anemia and hydr ops fetalis. an extremely significant finding that implied severe fetal jeopar dy and impending fetal death.
What is a sinusoidal pattern with regular amplitude and frequency?
A sinusoidal pattern has regular amplitude and frequency and is excluded in the definition of variability. A sinusoidal pattern has a smooth, undulating pattern, lasting at least 10 minutes with a fixed period of three to five cycles per minute and an amplitude of 5-15 bpm. Short-term variability is usually absent.
Is the sinusoidal heart rate pattern (SHR) real?
A review was made of the available literature on the sinusoidal heart rate (SHR) pattern. A specific definition of SHR was made in order to elucidate its clinical significance. According to this definition 41 tracings from 23 publications were classified as being either true SHR, equivocal, or a heart rate pattern other than SHR.
