Procedure: assigned randomly selected for each patient using a scheme sedation, 75 numbers were randomly through a generator of random number tables , with a minimum value of 1 and a maximum value of 3, and as they selected a patient was applied corresponding scheme in sequential order. On admission to the operating room the patient was channeled to a peripheral vein 18 -20Gauge, were monitored with electrocardiogram (ECG), non -invasive blood pressure (NIBP) and oxygen saturation by pulse oximetry (O2Sat) by a vital signs monitor; hemodynamic variables were recorded income. Was applied intravenously one of the pre-established schemes sedation according to patient weight and oxygen was administered by nasal cannula 1Litre/minutes , hemodynamic changes were recorded at 2.5 and 5 minutes from the scheme were implemented and evaluated the Ramsay scale at the time. The patient is positioned for carrying the anesthetic technique, and with a Quincke needle 26 Gauge, spinal anesthesia by a team of experienced anesthesiology was placed, corresponding to the authors of this study, the number of attempts and difficulty to blockade were noted, at the end of the surgical procedure a satisfaction survey was performed to the patient about their experience with spinal block.