title: Use of a high-frequency aspiration-biopsy transducer for direct ultrasound-guided amniocentesis.
abstract: The techniques and applications of amniocentesis performed with a new high-frequency aspiration-biopsy transducer are described in detail. The advantages of this technique are greatest in third-trimester patients where active fetal motion and diminished amniotic fluid volumes make unguided punctures difficult or impossible. The ability to visualize small-caliber needles within the fluid space further enhances the effectiveness of this technique.
mesh_terms: D000649:Amniocentesis / Q000379:methods; D001707:Biopsy, Needle / Q000295:instrumentation*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D014159:Transducers; D014463:Ultrasonography