ASA fasting guidelines are only applicable to healthy elective surgery patients. Measuring gastric volume now is not easy, and scintigraphy has remained the gold standard technique for many years. This prospective observational study aim to explore the gastric emptying of type 2 diabetic patients.

ASA fasting guidelines are only applicable to healthy elective surgery patients. Measuring gastric volume now is not easy, and scintigraphy has remained the gold standard technique for many years. Ultrasound has progressively emerged as a useful substitute due to its reduced cost and ease of performance.

Using gastric ultrasound measure gastric antrum cross-sectional area to determine whether patients are empty stomach, help anesthesiologists in preoperative evaluation of diabetic patients with the risk of aspiration, so as to guide the anesthesiologist take effective interventions, this prospective observational study aim to explore the gastric emptying of type 2 diabetic patients.

Inclusion Criteria:

1. Ages >18 years old
2. Diabetes (I or II)
3. Following American Society of Anesthesiologists (ASA) fasting guidelines before surgery
4. Undergoing general anesthesia

Exclusion Criteria:

1. Pregnant
2. Gastric Intestinal Tract (GIT) diseases or surgeries affect gastric emptying
3. Diagnosed with liver dysfunction or renal insufficiency
4. Patients who are unable to cooperate or understand the process

Diabetic patients undergoing elective surgery and firmly following ASA fasting guidelines.