What is the desired resting tone measured by intrauterine pressure catheter (IUPC) between contractions?

The desired resting tone measured by an intrauterine pressure catheter (IUPC) between contractions is between 7 - 25 mmHg. This range indicates a normal baseline pressure in the uterine cavity when there are no contractions occurring. A resting tone that falls within this range suggests that the uterus is functioning properly, without excessive tension or relaxation, which is important for adequate blood flow to the placenta and optimal fetal health.

A tone below 7 mmHg could suggest underactivity or a potential loss of uterine muscle tone, while a resting tone above 25 mmHg might indicate increased uterine pressure, potentially leading to complications such as reduced placental perfusion or uterine hypertonicity. Therefore, the range of 7 - 25 mmHg is considered optimal for healthy uterine function and effective monitoring of fetal health during labor.