Is a sinusoidal pattern Category 3?

What is Category 3 fetal heart rate?

Category III FHR tracings are abnormal and indicative of hypoxic risk to the fetus and possible acidemia (1, 7). They include either no baseline variability or the presence of recurrent late decelerations, variable decelerations, bradycardia, or a sinusoidal pattern (1).

What is a sinusoidal pattern fetal heart rate?

SINUSOIDAL PATTERN 24 It is a regular, smooth, undulating form typical of a sine wave that occurs with a frequency of two to five cycles per minute and an amplitude range of five to 15 bpm. It is also characterized by a stable baseline heart rate of 120 to 160 bpm and absent beat-to-beat variability.

What category is a sinusoidal pattern?

Category III: Abnormal The new NICHD guidelines label four FHR patterns as abnormal. One of the abnormal patterns is a sinusoidal heart rate, defined as a pattern of regular variability resembling a sine wave, with fixed periodicity of 3–5 cycles/ min and amplitude of 5–40 bpm.

How long does sinusoidal pattern last?

These authors noted that SHR pattern appeared approximately 19 min following alphaprodine administration and persisted for approximately 60 min. All infants were delivered with normal 5-minute Apgar scores without any perinatal deaths. In 27 cases of sinusoidal FHR pattern during labor, Ayromlooi et al.

What causes a prolonged deceleration?

They are caused by decreased blood flow to the placenta and can signify an impending fetal acidemia. Typically, late decelerations are shallow, with slow onset and gradual return to normal baseline. The usual cause of the late deceleration is uteroplacental insufficiency.

What are signs of fetal distress?

Fetal Distress Indicators

Abnormal Heart Rates. Babies who are progressing well in utero will have stable and robust heartbeats.
Decrease in Fetal Movement.
Maternal Cramping.
Maternal Weight Gain.
Vaginal Bleeding.
Meconium in the Amniotic Fluid.

What is a Category II Tracing?

Selected category II FHR abnormalities. Late decelerations without loss of variability or accelerations. Fetal tachycardia. Variable decelerations without loss of variability or accelerations. Loss of variability without decelerations.

How long does a sinusoidal pattern last?

What drugs cause sinusoidal pattern?

Other narcotics, such as butorphanol and nalbuphine, cause a sinusoidal fetal heart rate pattern that can mimic signs of hypoxia, although these drugs do not cause hypoxic injury. Lorazepam sometimes is used to potentiate the effects of opioids and provide anxiolysis.

What causes a true sinusoidal pattern?

FETAL CONDITIONS ASSOCIATED WITH SHR PATTERN: SHR pattern has been reported with the following fetal conditions: (1) severe fetal anemia of several etiologies; (2) effects of drugs, particularly narcotics; (3) fetal asphyxia/hypoxia; (4) fetal infection; (5) fetal cardiac anomalies; (6) fetal sleep cycles; and (7) …

What causes true sinusoidal pattern?

What does a sinusoidal pattern on a graph mean?

The red indicator is showing the mother’s contractions. The fetal heart rate is usually on the top of a computer screen, with the contractions on the bottom. Graph paper that is printed has the fetal heart rate to the left and the contractions to the right. In this manner, what category is a sinusoidal pattern?

What does a sinusoidal heart rate pattern indicate?

One of the abnormal patterns is a sinusoidal heart rate, defined as a pattern of regular variability resembling a sine wave, with fixed periodicity of 3–5 cycles/ min and amplitude of 5–40 bpm. What does marked variability indicate? Marked variability in the baseline FHR is present when the amplitude exceeds 25 BPM.

What does a sinusoidal pattern mean in fetal anemia?

It indicates severe fetal anemia, as occurs in cases of Rh disease or severe hypoxia. Click to see full answer. Keeping this in view, what does a sinusoidal pattern mean? A sinusoidal pattern has regular amplitude and frequency and is excluded in the definition of variability.

What is a Category 3 fetal heart tracing?

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. We sought to describe demographics and neonatal outcomes associated with CIII. Moreover, what is a Category 2 fetal heart tracing?