The drain was received and inspected.The drain was clean and contained no bodily fluids.The water seal contained sterile fluid that had been added to the required fill line.The drain was set-up and tested per the instructions for use (ifu).To ensure the chest drain was not leaking, a vacuum of -109mmhg was applied.The patient side tube was clamped off and no bubbling was detected with the regulator set at -10cmh2o.The regulator was then cycled up to -40cmh20 with no bubbling seen.The clamp pressure was released and rapid bubbling occurred as expected.The end result is a fully functional chest drain with no leaks.A review of the device history records found that the product met all specifications.The investigation was unable to determine the cause of the complaint based on the details of the event.The chest drains are 100% pressure tested in manufacturing to ensure the integrity of the product prior to shipment.Clinical evaluation: the oasis drain is intended to evacuate air and/or fluid from the chest cavity or mediastinum and to help re-establish lung expansion and restore breathing dynamics as well as to facilitate collection of autologous blood for reinfusion.The instructions for use (ifu) state patient tube connections, water seal, suction regulator and bellows should be checked regularly to confirm proper operation and that the suction source should be set to -80 mmhg or higher for chest drain regulator settings of -20 cmh2o or greater.The water seal is a feature on the drain that provides a visual cue that there is an air leak.Gentle continuous bubbling indicates suction is operative.
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