Amniotic Pressure
Amniotic Pressure - Related Videos
07:36
Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
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Cited by 20 •
2015
Encephalopathy of prematurity encompasses the central nervous system abnormalities associated with injury from preterm birth. This report describes a clinically relevant rat model of in utero transient systemic hypoxia-ischemia and intra-amniotic lipopolysaccharide administration (LPS) that mimics chorioamnionitis, and the related impact of infectious stimuli and placental underperfusion on CNS development.
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
09:34
Reprogramming Primary Amniotic Fluid and Membrane Cells to Pluripotency in Xeno-free Conditions
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Cited by 3 •
2017
This protocol describes the reprogramming of primary amniotic fluid and membrane mesenchymal stem cells into induced pluripotent stem cells using a non-integrating episomal approach in fully chemically defined conditions. Procedures of extraction, culture, reprogramming, and characterization of the resulting induced pluripotent stem cells by stringent methods are detailed.
02:34
Vapor Pressure
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2020
When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...
06:43
Intravenous and Intra-amniotic In Utero Transplantation in the Murine Model
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Cited by 11 •
2018
We describe a protocol for performing an in utero transplantation (IUT) through intravenous and intra-amniotic routes of injection in the murine model. This protocol can be used to introduce cells, viral vectors, and other substances into the unique immune-tolerant fetal environment.
FAQs
Amniotic pressure reflects a changing mechanical balance rather than a fixed value. Fluid volume contributes to the force transmitted around the fetus, while fetal movement can alter surrounding conditions. Uterine-wall compliance determines how readily the uterus accommodates these changes, so a similar volume or movement change may produce different pressure responses.
During labor, uterine contractions compress the uterine contents and create temporary increases in pressure within the uterine cavity. The magnitude of these changes provides a mechanical indication of contraction strength. Relating that information to labor progression helps clinicians assess uterine activity when the pattern or effectiveness of contractions needs closer evaluation.
An abnormal amniotic-fluid volume can change the mechanical conditions surrounding the fetus and alter how pressure is generated or transmitted. Consequently, a pressure finding should be considered alongside fluid volume rather than interpreted in isolation. This relationship makes pressure measurements potentially useful when clinicians assess whether unusual fluid conditions are affecting the intrauterine environment.
An intrauterine pressure catheter is useful when external monitoring does not provide sufficient information about uterine contractions. It allows clinicians to quantify contraction strength from pressure within the uterine cavity and use that information when evaluating labor progress. Its main value is obtaining a more direct assessment of uterine activity under the stated monitoring limitation.
Measurements can characterize pressure changes associated with uterine contractions and help quantify their strength. When external monitoring is insufficient, this information gives clinicians a way to evaluate uterine activity in relation to labor progress. The resulting data describe mechanical events occurring inside the uterine cavity, adding detail to assessment of whether labor is progressing.
Pressure changes provide insight into the physical environment surrounding the fetus because they reflect the combined effects of fluid volume, fetal movement, uterine-wall compliance, and, during labor, contractions. In medicine, this context can support assessment of abnormal fluid volume or uterine activity, while also showing that pressure represents a mechanical condition rather than a standalone diagnosis.