What method is used to obtain a quantitative measurement of the strength of contractions and resting tone?

The intrauterine pressure catheter is the correct method for obtaining a quantitative measurement of the strength of contractions and resting tone. This device is inserted into the uterus through the cervix and directly measures the intrauterine pressure, which allows for precise monitoring of uterine contractions. This level of accuracy is crucial for assessing labor progress and can help guide clinical decision-making during childbirth.

In contrast to the intrauterine pressure catheter, a tocodynamometer measures changes in uterine shape externally and provides qualitative data on contractions but does not quantify their strength or resting tone as precisely. Palpation can offer a subjective assessment of contraction strength and resting tone through physical examination but lacks the ability to provide quantitative data. A fetal scalp electrode is focused on monitoring the fetal heart rate and does not measure uterine contraction strength or resting tone at all. Thus, the intrauterine pressure catheter is uniquely positioned to deliver the quantitative feedback necessary for effective fetal monitoring during labor.