What indicates uterine tetany and hyperstimulation?

Uterine tetany and hyperstimulation are conditions that indicate excessively strong or prolonged uterine contractions, which can pose risks to both the mother and the fetus during labor. When contractions last longer than 90 seconds, it signifies that the uterus is not relaxing sufficiently between contractions, leading to potential complications such as reduced oxygen delivery to the fetus and increased maternal discomfort or risk for uterine rupture.

Extended contractions interfere with the normal physiological process of labor. The normal pattern of uterine contractions allows for respite periods where blood flow to the placenta, and subsequently to the fetus, can occur. Contractions exceeding 90 seconds can lead to decreased intrauterine blood flow, thereby affecting fetal health and leading to fetal distress circumstances.

In contrast, while decreased fetal movement, increased blood pressure, and fetal heart rate variability are factors monitoring fetal well-being and uterine conditions during labor, they do not specifically represent the definition or indication of uterine tetany and hyperstimulation. The primary indicator in this scenario is the duration of contractions, specifically when they exceed that critical threshold of 90 seconds.