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PubMed · 3883268

Sonographically monitored amniocentesis to decrease intraoperative complications.

R Romero·P Jeanty·E A Reece·P Grannum·M Bracken·R Berkowitz·J C Hobbins
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Abstract

The rates of intraoperative complications (dry and bloody taps) of two amniocentesis techniques were compared in 1300 patients undergoing second trimester procedures for genetic indications. The sonographically guided technique consisted of the selection of a site for needle insertion with ultrasound, removal of the transducer, and immediate amniocentesis. The sonographically monitored technique consisted of the continuous visualization of the needle during the entire procedure. Six hundred twelve amniocenteses were performed with the sonographically guided technique and 688 with the sonographically monitored technique. There was a statistically significant decrease in the incidence of bloody and dry taps of the first needle insertion (relative risk = 38%, P less than .0001) and also in the number of patients that required multiple needle insertions (relative risk = 42%, P less than .0001) with the sonographically monitored technique.

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AmniocentesisFemaleGestational AgeHumansIntraoperative ComplicationsMonitoring, PhysiologicPregnancyPregnancy Trimester, SecondPrenatal DiagnosisUltrasonographyComparative StudyJournal Article

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R Romero, P Jeanty, E A Reece, P Grannum, M Bracken, R Berkowitz, J C Hobbins. 1985. Sonographically monitored amniocentesis to decrease intraoperative complications.. https://pubmed.ncbi.nlm.nih.gov/3883268/

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PubMed1992

Antenatal maternal serum screening for Down's syndrome: results of a demonstration project.

OBJECTIVES: To assess the implementation of antenatal screening for Down's syndrome in practice, using individual risk estimates based on maternal age and the three serum markers: alpha fetoprotein, unconjugated oestriol, and human chorionic gonadotrophin. DESIGN: Demonstration project of Down's syndrome screening; women with a risk estimate at term of 1 in 250 or greater were classified as "screen positive" and offered diagnostic amniocentesis. SETTING: Hospital and community antenatal clinics in four health districts in London. SUBJECTS: 12,603 women of all ages with singleton pregnancies seen between February 1989 and the end of May 1991, with follow up of the outcome of pregnancy completed to the end of 1991. MAIN OUTCOME MEASURES: Uptake of screening, detection rate for Down's syndrome, false positive rate, odds of being affected given a positive result, and uptake of amniocentesis in women with positive screening results, together with the costs of the screening programme. RESULTS: The uptake of screening was 74%. The detection rate was 48% (12/25), and the false positive rate was 4.1%, consistent with results expected from previous work based on observational studies. There was a loss of detection due to the selective use of ultrasound scans among women with positive screening results. One affected pregnancy occurred among 205 reclassified as negative; this illustrated the danger of false negatives occurring in this group and lends weight to the view that if an ultrasound estimate of gestational age is used it should be carried out routinely on all women rather than selectively among those with positive results. The estimated cost of avoiding the birth of a baby with Down's syndrome was about 38,000 pounds, substantially less than the lifetime costs of care. CONCLUSION: Antenatal maternal serum screening for Down's syndrome is effective in practice and can be readily integrated into routine antenatal care. It is cost effective and performs better than selection for amniocentesis on the basis of maternal age alone.

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