Natural History of Fetal Renal Pyelectasis.
Summary of "Natural History of Fetal Renal Pyelectasis."
Abstract Objective: To follow the natural progression of fetal renal pyelectasis detected in the mid second trimester ultrasound in an unselected obstetric population. Study design: Single-centered, retrospective study that included all level II ultrasounds done from Jan 2008 to Dec 2009. The initial level II ultrasound was done in the mid second trimester. The renal pyelectasis detected on the antenatal ultrasound (AUS) was classified as mild (5-7mm), moderate (7.1-9mm), or severe (>9.1mm). Post-natal outcomes were classified as "Resolved", "Improving", or "Worsened". Results: 98 cases of fetal renal pyelectasis were detected. 16 patients were excluded. Of the remaining 82 cases of fetal pyelectasis, 32 (39%) were mild, 21 (25.6%) moderate, and 29 (35.4%) severe. In 74 (90.2 %) infants, pyelectasis resolved, remained stable, or improved in the postnatal ultrasound. In 8 (9.8%) infants, pyelectasis worsened. Conclusion: 90.2% of pyelectasis detected on AUS resolved spontaneously, remained stable or improved. The magnitude of fetal renal pyelectasis did not correlate with post-natal outcome. All fetal renal pyelectasis ≥ 5mm detected on the mid second trimester ultrasound should be followed antenatally. Those fetuses with persistent pyelectasis should be evaluated after birth and followed until resolution of pyelectasis or until a diagnosis is obtained.
Department of Pediatrics, Mount Sinai Hospital, Chicago.
This article was published in the following journal.
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22928536
- DOI: http://dx.doi.org/10.3109/14767058.2012.722726
Medical and Biotech [MESH] Definitions
Dilation of fetal KIDNEY PELVIS. It is a common PRENATAL ULTRASONOGRAPHY finding with no significant long-term sequelae.
The potential of the FETUS to survive outside the UTERUS after birth, natural or induced. Fetal viability depends largely on the FETAL ORGAN MATURITY, and environmental conditions.
A former branch of knowledge embracing the study, description, and classification of natural objects (as animals, plants, and minerals) and thus including the modern sciences of zoology, botany, and mineralogy insofar as they existed at that time. In the 17th, 18th, and 19th centuries it was much used for the generalized pursuit of certain areas of science. (Webster, 3d ed; from Dr. James H. Cassedy, NLM History of Medicine Division)
A nonreassuring fetal status (NRFS) indicating that the FETUS is compromised (American College of Obstetricians and Gynecologists 1988). It can be identified by sub-optimal values in FETAL HEART RATE; oxygenation of FETAL BLOOD; and other parameters.
A complication of pregnancy in which the UMBILICAL CORD wraps around the fetal neck once or multiple times. In some cases, cord entanglement around fetal neck may not affect pregnancy outcome significantly. In others, the nuchal cord may lead to restricted fetal blood flow, oxygen transport, fetal development, fetal movement, and complicated delivery at birth.
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