This report is being supplemented to provide additional information based on the legal manufacturer's final investigation.A review of the device history record found no deviations that could have caused or contributed to the reported issue.Based on the results of the investigation, the reported event is known to be reproduced by the following mechanisms: (1) the tip of the sheath is pressed against the tissues of the trachea, bronchi, esophagus and surrounding organs, (2) the sheath bends when the scope is pushed while the sheath is pressed against the tissue, (3) if you try to push out the needle with the sheath bent, the tip of the needle will catch on the bent portion of the sheath, making it impossible to push out, (4) when the needle cannot be pushed out, if you try to force it out a defect may occur.Therefore, the relationship between the delayed procedure and device cannot be denied.The event can be detected/prevented by following the instructions for use (ifu) which state: ¿do not round the insertion tube smaller than 15 cm in diameter.The insertion tube may be damaged.¿ ¿do not insert the needle forcibly, insert the needle while it is not fully retracted into the tube, or insert it rapidly.It may suddenly protrude from the tip of the endoscope, resulting in perforation, pneumothorax, major bleeding, mucous membrane damage, or damage to the endoscope or this product.Also, if the resistance is high and insertion is difficult, return the angle of the endoscope until it can be inserted without difficulty.¿ ¿do not press the tip of the insertion tube against the tissue in the body cavity with excessive force.Doing so may lead to perforation, pneumothorax, major bleeding, mucous membrane damage, etc., or damage to the product.¿ ¿if you try to push the needle out of the tube with the tip of the insertion tube pressed against the tissue inside the body cavity or with the tip of the insertion tube buckled, resistance may increase.If there is a lot of resistance when pushing the needle out of the tube, do not force the needle out.If the tip of the tube is deformed and the needle is pushed out in this state, the needle may pierce the tube, leading to perforation, pneumothorax, major bleeding, damage to the mucous membrane, etc., and damage to the endoscope.¿ olympus will continue to monitor field performance for this device.
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