Belmont immediately responded to the report of this incident by meeting with the facility in order to understand the nature of the event.The team at the facility first explained that they had a number of events in which there was a marked drop in blood pressure while rapidly infusing into a patient.The possibility that bradykinins were being generated by a visual change to the filter support was raised.Belmont explained that while the filter did indeed look different, the materials were all the very same class vi materials that had been utilized in the system since its initial release in 1997; the change was simply of geometry and the filter material was exactly the same as it has always been.Belmont contracted with an independent laboratory to run specific tests in order to determine whether our system could cause the generation of bradykinins.The test results revealed that there is no greater generation of bradykinins with the new reservoir compared with the old reservoir.The bolus feature is a temporary increase in flow rate for a specific volume.The significance of this is that all of the events appear when there is a high rate of infusion, suggesting that the key is the infusate.Single-use disposable device.
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The report from the user facility describes an event in which saline and a number of blood products were being introduced into a patient in response to surgery-induced hypovolemia at a rate of 500 ml/min.After 500 to 1000 ml of products were infused, the patient began to experience tachycardia and a drop in blood pressure, which were managed with pressors.The system was prophylactically replaced and a similar event occurred subsequently 4 hours later during a bolus operation of the replacement system.This was the first incident where a bolusing of blood products was noticed to cause a hypotensive event.Following this event, there were 4 similar cases.It was noted that of the 5 cases, a total of 4 patients were receiving ace inhibitors.It was also noted that the reservoir filter assembly had been redesigned the previous year.Belmont engineering responded to the initial inquiry by meeting with the hospital personnel in order to understand the situation.The hospital personnel speculated that the change in the filter might be causing the generation of bradykinins in the blood.
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