Insufflation on stryker laparoscopic tower was not regulating properly.Insufflation gas tanks were replaced three times throughout the surgery due to alert prompts by the insufflator machine; however it was evident that each tank that was removed/replaced still had gas leftover inside.As a result, patient's intra-thoracic pressure fluctuated throughout surgical procedure.We could not find any reason why the gas would have run out as fast as the staff said it did.Clinical engineering contacted stryker- representative switched out the device with a loaner and it was installed on tower.Requested service report when evaluation/repair is completed.Device still out for repair.
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