Obstetrics Book

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Amniocentesis

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  1. See Also
    1. Antenatal Screening
  2. Definition
    1. Definitive, second trimester Antenatal Screening for fetal chromosomal abnormalities
  3. Indications
    1. Antenatal Screening for fetal chromosomal abnormalities for high risk pregnancies
  4. Protocol
    1. Timing
      1. Safest time period: 16-18 weeks gestation
      2. Range of sampling time: 14-20 weeks gestation
    2. Technique
      1. Amniotic fluid sampled transabdominally under ultrasound guidance
  5. Adverse Effects
    1. Pregnancy loss (0.3 to 1% risk)
    2. Vaginal spotting
    3. Amniotic fluid leak
    4. Chorioamnionitis
    5. Fetal injury from amniocentesis needle
    6. Failed procedure in which fetal cells in amniotic fluid do not grow in culture
  6. Efficacy: Down Syndrome detection
    1. Test Sensitivity: 99.4%
  7. References
    1. Anderson (2009) Am Fam Physician 79(2):117
    2. Caughey (2006) Obstet Gynecol 108:612

Amniocentesis (C0002627)

Definition (MSH)Percutaneous transabdominal puncture of the uterus during pregnancy to obtain amniotic fluid. It is commonly used for fetal karyotype determination in order to diagnose abnormal fetal conditions.
Definition (CSP)percutaneous transabdominal puncture of the uterus during pregnancy to obtain amniotic fluid; it is commonly used for fetal karyotype determination in order to diagnose abnormal fetal conditions.
ConceptsDiagnostic Procedure (T060)
ICD975.1
MSHD000649
EnglishAC - Amniocentesis, Amniocenteses, Amniocentesis, Diagnostic amniocentesis, Incision and drainage of amnion
Spanishamniocentesis, amniocentesis diagnostica, incision y drenaje del amnios
Parent ConceptsPrenatal Diagnosis (C0033053), Obstetric procedure (C0869904), Other obstetric operations NOS (C0161942), Cytodiagnosis (C0010799), Paracentesis (C0034115), Aspiration - diagnostic (C0558581), Amniocentesis (C0002627), Operation on amniotic cavity (C0404317), Diagnostic procedure by site (C1285244), Aspiration-action (C0349707), Duplicate concept (C1274013)
SourcesAOD, CCS, CSP, ICD9CM, LCH, LNC, MEDLINEPLUS, MSH, NCI, SCTSPA, SNOMEDCT
Derived from the NIH UMLS (Unified Medical Language System)



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