Preparing the patient for operation.
D000367:Age Factors; D019411:Clinical Laboratory Techniques; D006761:Hospitals; D006801:Humans; D011183:Postoperative Complications / Q000517:prevention & control; D011300:Preoperative Care / Q000379:methods* / Q000523:psychology; D012306:Risk; D013530:Surgical Wound Infection / Q000517:prevention & control