Updated sections: g4,g7,h2,h3,h6,h10.Internal complaint number: (b)(4).The device was returned to the factory on 04/14/2020.An investigation was conducted on 05/28/2020.Signs of clinical use and slight evidence of blood was observed on the inside of the intact c-ring.The cannula was observed to be intact, no visual defects were observed.The insufflation tube and the water tube were observed to be intact.The c-ring appears to have been slightly tainted with blood as it appears to be reddish in color.The c-ring has no visible defects.Air flow on btt was tested on the btt insufflation port and air flow was not obstructed.The device was evaluated for the presence or absence of air flow through the distal insufflation tube using a cannula with the help of calibrated uson.A reference endoscope was inserted into a reference vv7 cannula and an air supply was connected to the distal insufflation tubing luer fitting.Air was passed through the insufflation port and was observed to flow freely through the distal port.To verify this, a pouch was sealed over the distal tip of the cannula.Air was passed through the cannula and the pouch was inflated.The air supply was stopped and the pouch stayed inflated.When gentle pressure was applied to the inflated pouch, the pouch deflated slightly, the air was turned back on and the pouch re-inflated.The test was then repeated for the reported cannula.The reference endoscope was inserted into the complaint device and evaluated for air flow.The device passed the air flow test, the co2 insufflation path on the complaint unit was open and unobstructed.The values displayed were within specified acceptable range which is 2197 sccm.Based upon the returned condition of the device and the results of the investigation, the reported failure "improper flow or infusion" was not confirmed.
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