title: Transabdominal chorionic villus sampling: a modified freehand ultrasonographically guided technique.
abstract: A simple modification of the technique of transabdominal chorionic villus sampling is described. This technique uses a short piece of extension tubing between the needle hub and aspirating syringe. The advantages of this technique are discussed.
authors.affiliation: Department of Obstetrics and Gynecology, Magee-Womens Hospital, University of Pittsburgh, PA.
authors.forename: L M
authors.initials: LM
authors.lastname: Hill
authors.forename: S A
authors.initials: SA
authors.lastname: Laifer
mesh_terms: D015193:Chorionic Villi Sampling / Q000295:instrumentation / Q000379:methods*; D005260:Female; D006801:Humans; D011247:Pregnancy; D013594:Syringes; D016216:Ultrasonography, Prenatal