The prolonged fasting period before surgery causes symptoms such as anxiety, hypoglycemia, increase in gastric volume, decrease in pH value, development of insulin resistance, thirst, feeling of hunger, hypovolemia, dehydration, headache, etc. in patients. For these reasons,Guidelines for Preoperative Nutrition in Children and Adults prepared by the European Society of Anesthesiologists, it was stated that solid foods six hours before surgery and clear liquids two hours before surgery could be consumed.In the accelerated recovery protocol (Enhanced Recovery After Surgery- ERAS), the preoperative fasting period before anesthesia is stated as two hours for liquid foods and six hours for solid foods (high level of evidence, strong level of recommendation).
Carbohydrate drinks act as a main meal in patients, increasing satiety and reducing insulin resistance. Carbohydrate drinks also increase the feeling of thirst and help to improve thirst sensitization. Therefore, it is recommended that patients should drink them before surgery. Carbohydrate-rich liquids that can be drunk up to two hours before elective surgery reduce fasting, thirst and postoperative insulin resistance and make the person feel good (evidence level 1++, recommendation grade A).
Hip fracture is a problem that increases with advanced age. It seems likely that the encounter with this problem and its costs will increase in the world due to the prolongation of life expectancy. Furthermore, the increased risk of osteoporosis due to increased sedentary life and malnutrition contribute to the development of this problem.Surgery is required in the treatment of 98% of elderly patients with hip fractures. Besides, the presence of chronic diseases in most elderly patients increases the risk of mortality and morbidity. Therefore, the risk of perioperative complications in elderly patients with hip fractures is a serious clinical problem.
Whey is a translucent, greenish-yellow liquid protein source obtained from the precipitation of casein in cheese or casein production. Similar in composition to milk, whey contains about half of the milk dry matter, almost all of the milk sugar, about 1/5 of the proteins and most of the B vitamins. After technological developments, whey is no longer considered as a waste but is used in industry. Many clinical trials have shown that whey is effective in the treatment of cancer, AIDS, hepatitis B, heart diseases and osteoporosis. 6 Prolonged preoperative fasting in elderly patients causes metabolic changes, and postoperative nausea and vomiting cause changes in blood glucose and prolonged hospital stay. When the literature was reviewed, it was observed that the number of studies on whey in preoperative oral carbohydrate intake, which is included in ERAS protocols in orthopedic patients, is very limited and academic studies are needed. This study was conducted to determine the effect of whey, as a different liquid other than oral carbohydrate liquids, on patients hunger, thirst, blood sugar and nausea and vomiting.
