In which situation would the use of a solid-tipped catheter be preferred over a fluid-filled IUPC?

Using a solid-tipped catheter in the presence of potential uterine atony is preferred because this situation requires careful monitoring and assessment of uterine tone and contractions. A solid-tipped catheter provides a reliable method to gauge these parameters without the risk of fluid accumulation, which can occur with a fluid-filled intrauterine pressure catheter (IUPC).

In cases of uterine atony, where the uterus does not contract effectively after childbirth, accurate real-time assessment is crucial for managing potential complications, such as postpartum hemorrhage. The solid-tipped catheter's design allows for more immediate and clear feedback on uterine activity, which is vital for timely interventions.

Other scenarios, while relevant to intrauterine monitoring, do not inherently provide the same level of necessity for immediate pressure readings or conditions where uterine tone needs to be closely monitored.