Changes in Intra-Amniotic, Fetal Intrathoracic, and Intraperitoneal Pressures with Uterine Contraction: A Report of Three Cases

Figure 1

(A) Ultrasound and zero pressure level line setting during amnioreduction for polyhydramnios. (B) Circuit that includes a silicone stain-gauge transducer (DX-300, Nihon Koden) for measuring pressure.

(a)

(b)