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Glycine as a potential window for minimal access fetal surgery
1Department of Paediatric Surgery, Women's and Children's Hospital, Adelaide, Australia.
Fetal Diagnosis and Therapy
|May 1, 1997
Summary
Glycine infusion into sheep amniotic fluid allows fetal surgery without gas, preventing acidosis. This method showed no adverse effects, enabling minimally invasive fetal procedures.
Area of Science:
- Veterinary Surgery
- Fetal Medicine
- Surgical Innovation
Background:
- Carbon dioxide (CO2) insufflation is used in fetal lamb surgery for electrocautery but causes lethal acidosis.
- A gas-free alternative is needed for minimally invasive fetal procedures.
Purpose of the Study:
- To evaluate the safety and efficacy of using 0.5% glycine to replace amniotic fluid in fetal sheep.
- To determine if glycine has short- or long-term deleterious effects on fetal development.
Main Methods:
- Amniotic fluid in 10 fetal sheep (101 days gestation) was partially replaced with 0.5% glycine.
- Histological examination of skin, gastrointestinal tract, and pulmonary tree was performed at 2 and 6 weeks post-procedure.
- Comparison was made with control fetuses.
Main Results:
- No histological differences were observed between glycine-treated and control fetuses at either time point.
- Glycine enabled electrocautery dissection and vessel electrocoagulation in fetal sheep.
- No apparent adverse effects were associated with glycine use.
Conclusions:
- 0.5% glycine is a safe and effective amniotic fluid replacement for fetal sheep surgery.
- This technique facilitates minimally invasive fetal procedures like electrocautery.
- Glycine shows potential for fetal tracheal surgery or managing fetal bladder enlargement.