anhydramnios definition
Polyhydramnios -. Polyhydramnios is a condition in which the pregnant uterus contains too much amniotic fluid [A pathologic accumulation of amniotic fluid volumes greater than 2,000 mL] . The definition of too much is generally considered to be more than 2 liters; the average amount is about 1 liter. Most cases of polyhydramnios are mild and involve less than 3 liters of amniotic fluid. The common clinical features are smaller symphysiofundal height, fetal malpresentation, undue prominence of fetal parts and reduced amount of amniotic fluid. Oligohydramnios is a condition in pregnancy characterized by a deficiency of amniotic fluid. It is the opposite of polyhydramnios. [hīdram′nē·əs] Etymology: Gk, hydor + amnos, lamb's caul. an abnormal condition of pregnancy characterized by an excess of amniotic fluid. It occurs in less than 1% of pregnancies and is diagnosed by palpation, ultrasound, or radiographic examination. Potter sequence is the atypical physical appearance of a baby due to oligohydramnios experienced when in the uterus. Oligohydramnios is the decrease in amniotic fluid volume sufficient to cause deformations in morphogenesis of the fetus. If the anhydramnios is the result of a tear in the lining of the placenta, there is a chance that the infant can survive past birth. The infant will require assistance with breathing for a time. In most cases, however, the complete lack of amniotic fluid will leave the infant’s lungs severely underdeveloped. Oligohydramnios refers to amniotic fluid volume that is less than expected for gestational age. It is typically diagnosed by ultrasound examination and may be described qualitatively (eg, normal, reduced) or quantitatively (eg, amniotic fluid index [AFI] ≤5). Methods of amniotic fluid volume assessment are reviewed separately. Dr Matt A. Morgan ◉ and Radswiki et al. Anhydramnios is a term where there is a complete or near-complete lack of amniotic fluid (sometimes referred to as liquor volume). Article: The term Potter sequence was initially intended to only refer to cases caused by BRA; however, it is now commonly used by many clinicians and researchers to refer to any case that presents with oligohydramnios or anhydramnios regardless of the source of the loss of amniotic fluid. Anhydramnios is a condition, occurring in pregnancy, in which there is no amniotic fluid around the fetus. The condition can cause a number of problems, including respiratory failure once the infant is born. With modern medical intervention, anhydramnios is not always deadly, though it does require a quick response by the infant’s medical team.
Anhydramnios is a term where there is a complete or near-complete lack of amniotic fluid.