A 25 year old G2P, at 39 weeks gestation is electing to have spinal anaesthesia for a repeat cesarean section. 5 minutes after bupivacaine spinal injection, the patient becomes hypotensive and is complaining of tingling in her fingers with subjective difficulty breathing. Her oxygen saturation remains 100% and blood pressure in 90/60 mmHg The most likely etiology is.
High-Yield Explanation
In pregnancy, CSF volume is decreased, thereby decreasing dose requirement of local anaesthetic. This facilitates spread of local anaesthetic when spinal anaesthesia is given.
Option D would have been correct, if question mentioned Epidural anaesthesia.