Randomized controlled study of colloid preload before spinal anaesthesia for caesarean section

Area of Science:

• Anesthesiology
• Obstetrics
• Pharmacology

Background:

• Spinal anesthesia for Cesarean sections can cause hypotension.
• Maintaining hemodynamic stability is crucial for both mother and neonate.
• Fluid preloading is a common strategy to mitigate hypotension.

Purpose of the Study:

• To evaluate the effect of a colloid preload (4% gelatin) on hemodynamic stability during spinal anesthesia for elective Cesarean section.
• To compare vasopressor requirements and blood pressure changes between colloid and no-preload groups.
• To assess the impact of colloid preload on maternal nausea and neonatal outcomes.

Main Methods:

• Randomized controlled trial involving women undergoing elective Cesarean section.
• Intervention group received 4% gelatin (Gelofusine) intravenous preload; control group received no preload.
• Systolic arterial pressure (SAP) was monitored, and metaraminol infusion was titrated to maintain SAP within 90-100% of baseline.

Main Results:

• The colloid group required significantly less vasopressor (metaraminol) in the first 10 minutes post-spinal anesthesia.
• The colloid group experienced a higher minimum SAP compared to the control group.
• Maternal nausea was less frequent in the colloid group (6% vs. 24%), while neonatal outcomes were comparable.

Conclusions:

• Colloid preload with 4% gelatin improves hemodynamic stability during spinal anesthesia for Cesarean section.
• Effective vasopressor management can maintain hemodynamic stability but colloid preload may reduce the need for it.
• Colloid preload did not negatively impact neonatal outcomes in this study.