Trackwise#: (b)(4).The device was returned to the factory for evaluation on 12/02/2022.An investigation was conducted on 12/14/2022.A visual inspection was conducted.Signs of clinical use and evidence of blood was observed.There were no visual defects observed on the cannula or the intact c-ring.The btt was observed to be intact, with no visual defects observed.A mechanical evaluation was conducted.The btt was able to be inflated.No visual defects were observed on the silicone btt.A 5cc syringe, filled with saline was attached to the co2 line on the btt and squeezed the syringe to spray the saline.There was no backflow observed in the co2 line.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 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 (id 14332 due: 01/31/2023).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 2195 sccm.Based on the condition of the device, the reported failures "improper flow or infusion" was not confirmed.The lot # 3000263853 history record review was completed.There were ncmrs , rework, or deviations documented for the reported lot number.[ncmr #17521- a notification was received from gxo that 2 sterile loads came to their facility with external damage.During the inbound inspection 2 out of (b)(4) units for material vh-4000 batch # 3000268642 and 2 out of (b)(4) units for material # vh-4000, batch # 3000263853 were found damaged.].Based on the dhr/lhr review results, it was determined that there is no relation between the batch manufacturing process and the reported failure.
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