A Comparison of the injection rate of local anaesthetic during spinal anesthesia on the onset of sensory block and incidence of hypotension in Caesarean section

Spinal anesthesia is the most common anesthesia for Caesarean section due to lower exposure of the fetus to drugs, creating profound sensory and motor block as well as low risk of pulmonary maternal aspiration. Many factors such as type of local anesthetic, dose, rate of injection, volume of subarachnoid space, patient’s position play a role for adequate sensory block level in caesarean section with spinal block. Hypotension is the most common complication of spinal anesthesia. The most feared effect of hypotension is that it may lead to fetal hypoxia and acidosis by reducing uteroplacental perfusion if not treated timely.  In current study, we hypothesized that there may be delay in reaching the level of sensory block with turbulent flow caused by rapid local anesthetic injection. We aimed to investigate the effects of 2 injection rates that is not close to each other to achieve a sensory block level and intraoperative maternal hypotension and any other complications in elective caesarean section surgeriese