What does the tocodynamometer primarily measure in relation to the uterus?

The tocodynamometer is primarily designed to measure the pressure exerted by the uterine muscle, reflecting the strength of uterine contractions. It operates by sensing and recording the changes in the tension of the abdominal wall that correspond to contractions during labor. This pressure measurement provides key insights about the intensity of contractions, which is important in assessing labor progress and the overall well-being of the fetus.

Understanding uterine contractions—how strong they are—helps healthcare providers determine appropriate interventions during labor. While the tocodynamometer can provide information about the frequency and duration of contractions through its pressure readings, its core functionality centers around measuring the pressure, which is essential for evaluating the effectiveness of contractions and their impact on fetal descent.