Dear patients and their families, crural embolism of the preoperative whether there is anxiety and nervousness, whether the preparation for the operation is clueless, in fact, these are normal psychological state before the operation, in order to alleviate the doubts, special preoperative preparations need to be done to introduce you. 1, the preoperative need to improve the blood test, usually hospitalized in the morning of the next day to draw blood (adults at 10:00 pm the first day of fasting water; children according to the situation). 2, preoperative routine need to do chest X-ray, electrocardiogram; according to the patient’s condition, may choose to do the examination includes abdominal ultrasound, cardiac ultrasound, bladder ultrasound and residual urine examination, if necessary, may need to review the cristae nuclear magnetic examination. 3, the day before the surgery can not leave the hospital, need to do antibiotic skin test, surgical site skin preparation, the night before the surgery need to use glycerin enema or corkscrew enema, generally adults the night before after 10:00 p.m. to start fasting water, children according to the specific circumstances (breastfeeding milk ban 4 hours, formula feeding fasting water for 6 hours). 4, the day before the operation, the doctor will find the family to sign a consent form, the approximate time of the operation, the operation, the potential risks of the operation, postoperative precautions to inform the family. 5.Pre-operative items to be prepared, pediatric need to prepare baby stickers and antipyretic drugs (1 year of age to prepare ibuprofen drops 1 bottle; children over 1 year of age to prepare ibuprofen suspension 1 bottle); 500g of salt 1 package; children over 5 years of age need to prepare a waist cincher. 6.Pay the hospitalization deposit on the first day before surgery. 7, the preoperative preparation needs the active cooperation and participation of family members, only to be fully prepared, in order to better carry out the next step of the treatment Oh!