<unk>  is the practice of a surgical patient abstaining from eating or drinking ("nothing by mouth") for some time before having an operation. This is intended to prevent stomach contents from getting into the windpipe and lungs (known as a pulmonary aspiration) while the patient is under general anesthesia. The latest guidelines do not support<unk> , as there is no difference in residual gastric fluid volume, pH or gastric emptying rate following semi-solid meals or drinks, whether in obese or lean individuals.
Preoperative fasting
Vascular access for chemotherapy
Surgery for benign prostatic hyperplasia
Preoperative care
Abdominal surgery
Elective surgery
Colorectal surgery
Surgical management of fecal incontinence