2. A nasocystic catheter is placed into the WON through the plastic stent and irrigated every six hours using 250 cc of normal saline for 48 hours. The patient will remain in-patient for irrigation of the nasocystic catheter. If an attempt at nasocystic catheter fails the endoscopist will attempt to lavage the cystic cavity with 2L of saline at that time with 2L of sterile water.