Based on randomization, patients will receive a mixture for spinal anesthesia and will be followed in the following hours for the various outcomes and for functional recovery
patients over 18 year of age
height over 160 cm
American Society Anesthesiologists physical status I and II
term singleton parturients
patients with inability to consent
patient refusal
contraindication to spinal anesthesia (eg, hemodynamic instability, infection at the surgery site, and neurologic defects such as transverse myelitis)
emergency cesarean delivery