NCC Certified Electronic Fetal Monitoring (C-EFM) Practice Exam

What does a tocodynamometer primarily detect?

1. The baseline fetal heart rate

2. Changes in uterine wall shape

3. The fetal movement patterns

4. The frequency of contractions

The correct answer is: Changes in uterine wall shape

A tocodynamometer primarily detects the frequency of contractions during labor. This device is an important tool in obstetrics, as it helps monitor uterine activity by measuring changes in shape and tension in the uterine wall. It is typically placed on the mother's abdomen and provides vital information about contraction patterns, which can help healthcare providers assess labor progress and manage the birthing process. While the other options mention aspects related to fetal monitoring and assessment of the mother's condition, they do not accurately describe the primary function of a tocodynamometer. Fetal heart rate is measured using a separate device, while fetal movement patterns typically require other monitoring methods. The baseline fetal heart rate is not detectable by this specific tool; therefore, it is crucial to understand that the tocodynamometer is distinct in its ability to focus on uterine contractions rather than the other aspects mentioned.