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Diagnostic fetal blood sampling-technique related losses
1Departments of Obstetrics and Gynecology, University of Iowa, College of Medicine, Iowa City.
Fetal Diagnosis and Therapy
|May 1, 1996
Summary
The technique used for cordocentesis (needle insertion) significantly impacts the risk of perinatal loss. Using a fixed needle guide resulted in a lower loss rate (0.9%) compared to the freehand method.
Area of Science:
- Perinatal medicine
- Fetal surgery
- Medical device safety
Background:
- Cordocentesis, a fetal diagnostic procedure, has applications limited by safety concerns.
- Existing data suggest perinatal loss rates of 1-7% with the freehand cordocentesis technique.
- The influence of procedural technique on cordocentesis-related perinatal loss remains under-examined.
Purpose of the Study:
- To evaluate the impact of cordocentesis technique on procedure-related perinatal loss rates.
- To compare perinatal loss rates between fixed needle guide and freehand techniques.
Main Methods:
- A prospective database of 1,260 diagnostic cordocenteses using a fixed needle guide was analyzed.
- Procedure-related loss rates were calculated for operators in the US and Japan.
- Published data on freehand cordocentesis were used for comparison.
Main Results:
- The fixed needle guide technique resulted in a 0.9% perinatal loss rate (12/1260).
- Umbilical artery puncture (41.7%) was more frequently associated with loss than umbilical vein puncture (9.2%).
- Loss rates were significantly lower for diagnoses other than chromosomal abnormalities and severe fetal growth restriction (0.2%).
Conclusions:
- Procedural technique is a significant variable influencing perinatal loss in cordocentesis.
- The fixed needle guide technique appears to offer a safer alternative to the freehand method.
- Further research into optimizing cordocentesis techniques is warranted to improve fetal outcomes.