AXIOS™ for Gallbladder Drainage as an Alternative to Percutaneous Drainage IDE

Inclusion Criteria: 1. Patient requiring intervention for the management of symptoms associated with acute cholecystitis 2. Patients referred for percutaneous drainage of the gallbladder who are not surgical candidates because of advanced age, anesthetic risk, significant co-morbidities and/or overall health 3. Eligible for endoscopic intervention 4. Acute Cholecystitis (AC) Grade I (mild) or II (moderate) per Tokyo guidelines: * AC Grade I (mild) defined as acute cholecystitis in an otherwise healthy patient with mild local inflammatory changes and without organ dysfunction. Criteria for grade II or III not met. * AC Grade II (moderate) defined by any one of the following characteristics * Leukocytosis (\>18,000 cells per mm3) * Palpable, tender mass in right upper quadrant * Symptom duration \>72 hours * Marked local inflammation (gangrenous or emphysematous cholecystitis, pericholecystic or hepatic abscess, biliary peritonitis) 5. Pre-drainage imaging confirms sufficient stone-free space to allow AXIOS™ stent deployment and complete flange expansion 6. 18 years of age or older 7. Willing and able to comply with the study procedures and patient or legally authorized representative (LAR) must provide written informed consent form (ICF) to participate in the study Exclusion Criteria: 1. AC Grade III (severe) per Tokyo guidelines defined by organ dysfunction in any one of the following systems: * Cardiovascular - Hypotension requiring administration of ≥5μg/kg/min of dopamine or any dose of norepinephrine * Neurologic - decreased level of consciousness * Respiratory - PaO2/FiO2 \<300 * Renal - Oliguria and Creatinine \>2.0 mg/dl (\>177 μmol/liter) * Hepatic - International normalized ratio \>1.5 * Hematologic - Platelet count \<100,000/mm3 2. Obvious signs on diagnostic imaging of perforated, extensive gangrenous or ischemic gallbladder 3. Hepatic abscess 4. Ascites 5. Patients with abnormal coagulation or who require ongoing complete anticoagulation 6. Bleeding diathesis 7. History of surgical treatment of acute cholecystitis (e.g. cholecystectomy) 8. Patients with a current percutaneous drainage 9. Patients with a history of percutaneous gallbladder drainage without AC free period following percutaneous drainage removal 10. Distance between gallbladder wall and duodenal or gastric wall \> 1cm by US (ultrasound) at the time of drainage 11. Patients with intervening gastric varices or vessels within a one centimeter radius of the device insertion location 12. Patients that have allergies or are sensitive to any of the device materials 13. Patients with contraindications to use of electrical devices 14. Pregnancy 15. Prisoners and other vulnerable populations