1. Preparation: The patient is usually positioned in a semi-recumbent or supine position. The skin over the puncture site is cleaned and sterilized. 2. Local Anesthesia: A local anesthetic is administered to minimize discomfort. 3. Needle Insertion: A needle attached to a catheter is carefully inserted into the peritoneal cavity, usually in the lower abdomen. 4. Fluid Aspiration: Fluid is aspirated and collected for analysis or drainage. 5. Post-Procedure Care: The site is covered with a sterile dressing, and the patient is monitored for any complications.