Noninvasive Positive Pressure Ventilation (NIPPV)-Associated Expanding Hiatal Hernia Causing Pulmonary Tamponade: A Case Report on Unusual Complication of NIPPV.

Numerous diseases related to gastric distension have been found and shown to be linked with noninvasive positive pressure ventilation (NIPPV). We describe the case of a 93-year-old female who came with progressively worsening shortness of breath that initially responded to NIPPV but subsequently deteriorated. Imaging revealed gaseous distension of a preexisting hiatal hernia with air-fluid levels and compressive effects on the left lower lobe of the lung. She was successfully managed using a conservative decompression strategy. This is the first case to our knowledge of NIPPV causing considerable distension of an existing hiatal hernia to the point of mediastinal tamponade.