Post by Saltyjb on Apr 1, 2024 22:27:24 GMT
I have a 2008T machine with 17k hours that is repeatedly giving a “Heparin Pump Alarm” when the heparin pump is in operation. The machine seems to run like normal with no heparin alarm for the first few minutes but after the heparin pump has either been running for a while in Tx mode with any heparin rate, or after a few bolus infusions, the heparin pump will stop and the alarm will pop up. When the issue is occurring, it doesn’t matter which command you give the heparin module (load heparin, prime, or bolus infusion) it will start moving once the confirm key is pressed, then it will just stop a few seconds into the command.
Swapping parts from a known good machine with no heparin alarms, I have replaced the gear motor, heparin board, entire heparin module, heparin cable that connects to distribution board, distribution board, actuator cable, actuator test board, functional boatd, sensor board, sensor cable.
The only thing that has totally eliminated the alarm was piggy backing this machine’s boards and heparin pump onto another machines hydraulics. Due to this, my thinking is there is a short somewhere in the hydraulics that is causing this really weird issue. I have yet to be able to recreate it in a simulated therapy with the YF on but the nurse alerted me that the machine also gave her a random “UF Pump alarm” during the same treatment that the heparin alarm was popping up.
I am going back tomorrow to work on this machine again and I will update with my findings, but this one is really stumping me.
My plans for tomorrow are to try replacing the UF/acid/Bic pumps to see if one is shorting, obviously I’m going to focus on the UF first.
Any other ideas what could be causing this alarm? I have tried heparin modules from three different machines to confirm that I wasn’t somehow using two bad heparin modules in troubleshooting this issue.
Swapping parts from a known good machine with no heparin alarms, I have replaced the gear motor, heparin board, entire heparin module, heparin cable that connects to distribution board, distribution board, actuator cable, actuator test board, functional boatd, sensor board, sensor cable.
The only thing that has totally eliminated the alarm was piggy backing this machine’s boards and heparin pump onto another machines hydraulics. Due to this, my thinking is there is a short somewhere in the hydraulics that is causing this really weird issue. I have yet to be able to recreate it in a simulated therapy with the YF on but the nurse alerted me that the machine also gave her a random “UF Pump alarm” during the same treatment that the heparin alarm was popping up.
I am going back tomorrow to work on this machine again and I will update with my findings, but this one is really stumping me.
My plans for tomorrow are to try replacing the UF/acid/Bic pumps to see if one is shorting, obviously I’m going to focus on the UF first.
Any other ideas what could be causing this alarm? I have tried heparin modules from three different machines to confirm that I wasn’t somehow using two bad heparin modules in troubleshooting this issue.
