A randomized study to assess two different techniques of aspiration while performing transabdominal chorionic villus...

Area of Science:

• Medical procedures
• Prenatal diagnostics
• Genetics

Background:

• Transabdominal chorionic villus sampling (CVS) techniques for genetic analysis are not standardized.
• Current methods often rely on manual vacuum creation, which can be inconsistent.

Purpose of the Study:

• To evaluate the feasibility of a novel transabdominal CVS technique using a Vacutainer for continuous negative pressure.
• To compare sample yield and procedure efficiency against traditional syringe-based methods.

Main Methods:

• A randomized study involving 200 pregnant women (10-16 weeks gestation) compared a Vacutainer system to a traditional hand-grip device for CVS.
• Procedures were performed transabdominally using ultrasound guidance with a 20-gauge needle by four operators.
• The study was powered to detect differences in chorionic sample size.

Main Results:

• The median sample yield was 20 mg, with no significant difference between the Vacutainer and traditional groups.
• Fetal loss rate was 1.7%, occurring only in the traditional group with single needle insertions.
• The Vacutainer method required a second needle insertion more frequently.

Conclusions:

• The Vacutainer technique for transabdominal CVS is a feasible and effective alternative to traditional methods.
• This approach utilizes a readily available device and simplifies the procedure to a one-operator task.