Fasting Before Paracentesis

Evidence-Based Rationale

The Gut guidelines recommend that patients do not need to fast before paracentesis, and may eat and drink normally up until the time of the procedure, as there are no dietary restrictions required prior to this procedure 1
The KASL guidelines detail technical aspects of paracentesis, including site selection, hemorrhage risk management, and contraindications, but do not list fasting as a necessary precaution 2, 3
The Hepatology guidelines extensively cover paracentesis technique, site selection, and bleeding risk factors without any fasting recommendations 4, 5

No sedation is typically used during paracentesis, as the procedure is performed with local anesthesia only, eliminating aspiration risk associated with altered consciousness 1, 2
The procedure does not involve the gastrointestinal tract, unlike endoscopic procedures, and accesses the peritoneal cavity through the abdominal wall without entering the bowel 2, 4
Aspiration risk is negligible, as patients remain fully alert and maintain their protective airway reflexes throughout the procedure 1

Informed consent should be obtained before paracentesis 1
Ultrasound guidance should be considered when available to reduce adverse events 1
Routine coagulation testing and prophylactic blood product transfusion are not recommended, even with high INR and low platelet counts, as hemorrhagic complications remain rare (0.2-2.2% of procedures) 1, 2, 4, 5
Site selection should prioritize the left lower quadrant, where the abdominal wall is thinner and ascites depth is greater 1, 2, 4

No dietary restrictions are needed post-procedure, and patients can resume normal eating immediately 1, 2
Patients should lie on the opposite side for 2 hours if there is ascitic fluid leakage to minimize leakage risk 1
For large volume paracentesis >5L, albumin replacement (6-8g per liter drained) is recommended to prevent post-paracentesis circulatory dysfunction 3, 9