This single-center quality improvement project evaluates preoperative fasting times before elective procedures requiring anesthesiology care. The project aims to reduce prolonged fasting for clear fluids by implementing a local standard operating procedure (SOP) allowing patients to drink clear liquids until being called to the operating room ("drink until called"), supported by staff education and fasting instruction cards. Fasting times and selected perioperative outcomes will be assessed before and after implementation.
Traditionally, surgical patients are instructed to fast for prolonged periods to reduce the risk of pulmonary aspiration. International guidelines recommend fasting from clear liquids for 2 hours prior to elective procedures, yet real-world fasting often extends to 6-10 hours, which can impair patient well-being and may contribute to complications such as dehydration, hypoglycemia, postoperative nausea and vomiting, and delirium-particularly in older or frail patients. This quality improvement project follows the Plan-Do-Study-Act (PDSA) framework. Plan: Review evidence and decide to implement "drink until called to the OR." Do: Train anesthesiology staff, adapt local SOPs, provide oral patient instructions, and introduce fasting instruction cards for patients and staff. Study: Record and analyze fasting times and fluid intake prior to anesthesia induction; assess effectiveness and adjust strategies. Act: Add further staff education, posters, and short instructional screencasts to reinforce the updated fasting guidance.
Study Type
OBSERVATIONAL
Enrollment
1,000
Justus Liebig University Giessen, University Hospital Giessen and Marburg
Giessen, Germany
RECRUITINGPreoperative fasting time (clear liquids and solids)
Time interval between last intake of clear liquids and anesthesia induction. Time interval between last solid meal and anesthesia induction.
Time frame: At anesthesia induction.
PACU length of stay
PACU length of stay
Time frame: PACU admission to discharge.
Preoperative fasting time (clear liquids and solids)
Time interval between last intake of clear liquids and anesthesia induction. Time interval between last solid meal and anesthesia induction.
Time frame: At anesthesia induction (pre vs post implementation periods).
Patient satisfaction regarding fasting
Patient satisfaction regarding fasting (questionnaire)
Time frame: immediately after the intervention/procedure/surgery up to 1 day postoperatively
Perioperative complications
Perioperative complications (e.g., nausea, vomiting, regurgitation/aspiration)
Time frame: Intraoperative and immediate postoperative period (PACU).
Postoperative pulmonary and gastrointestinal complications
Pneumonia,Aspiration, nausea and vomiting
Time frame: During the hospital stay up to 30 days
Delirium occurrence
Occurance of postoperative delir
Time frame: During the hospital stay, up to 30 days
Hospital length of stay and in-hospital mortality
Hospital length of stay and in-hospital mortality
Time frame: Until hospital discharge / up to 30 days
Acute kidney injury (AKI)
Acute kidney injury (AKI) (creatinine increase)
Time frame: Within the first 3 postoperative days.
ICU/IMC admission
ICU/IMC admission (planned/unplanned) and duration
Time frame: During the hospital stay up to 30 days
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