Case Report
Changes in Intra-Amniotic, Fetal Intrathoracic, and Intraperitoneal Pressures with Uterine Contraction: A Report of Three Cases
Table 1
Results and literature review of intra-amniotic and fetal intrathoracic and intraperitoneal pressures.
| Case | Diagnosis | GA at measurement (weeks) | Intra-amniotic pressure (mmHg) | Intrathoracic pressure (mmHg) | Intraperitoneal pressure (mmHg) | Before R | After R/baseline | With UC | Before R | After R | With UC | Before R | After R | With UC |
| 1 | Polyhydramnios | 22 | 16 | 9 | 29 | | | | | | | 2 | Chylous ascites polyhydramnios | 38 | | | | | | | 18 | 14 | 32 | 3 | Chylothorax | 22 | | | 20–22 | 30 | 19 | | | | | Our control cases | Amniocentesis for chromosome analysis | 16 | | 10, 10 | | | | | | | | 18 | | 10, 13 | | | | | | | | Yamamoto et al. 2007 | Chylothorax polyhydramnios | 31 | 21 | | | 39 | | | | | | | | | | Baseline | | | | | | Baseline | | Nicolini et al. 1989 | Intrauterine transfusion | | | | | | | | | 2.5 (1.4–3.6) | | Fisk et al. 1992 | | 16 | | 2.2–9.3 | | | | | | | | 18 | | 2.2–9.5 | | | | | | | | 20 | | 2.3–9.6 | | | | | | | | 22 | | 2.3–9.7 | | | | | | | | 24 | | 2.3–9.7 | | | | | | | | 26 | | 2.3–9.8 | | | | | | | | 28 | | 2.4–10.1 | | | | | | | | 30 | | 2.5–10.6 | | | | | | | | 32 | | 2.8–11.5 | | | | | | | | 34 | | 3.2–13.1 | | | | | | | |
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GA, gestational age; R, removal of amniotic fluid; UC, uterine contraction; baseline , baseline pressure not related to amnioreduction. |