Large Dose Bupivacaine 0.5% versus Small Dose in Elective Cesarean Section

Area of Science:

• Anesthesiology
• Obstetric Anesthesia

Background:

• Spinal anesthesia for cesarean sections presents challenges balancing anesthetic depth and hypotension.
• Managing bupivacaine dosage is critical to avoid either inadequate anesthesia or severe hypotension.

Purpose of the Study:

• To evaluate a modified spinal anesthesia technique for cesarean sections.
• To mitigate hypotension while ensuring effective anesthesia using a higher bupivacaine dose and prolonged sitting.

Main Methods:

• A randomized study involving 53 patients divided into two groups.
• Group B received 3 mL bupivacaine with 5 minutes of sitting upright.
• Group C received 2.5 mL bupivacaine and immediate supine positioning.

Main Results:

• Group B required significantly less ephedrine (7.2 mg) compared to Group C (27.86 mg) (P < 0.05).
• Both groups achieved comparable, satisfactory sensory block levels for cesarean delivery.

Conclusions:

• A higher dose of bupivacaine (15 mg) combined with prolonged sitting is effective in preventing hypotension during spinal anesthesia for cesarean sections.
• This approach ensures adequate anesthesia block with reduced need for vasopressors.