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Post by Rookie on Feb 15, 2023 17:13:35 GMT
I have a 2008T machine (11684 hours) that has been getting airlocked after every use. It never fails tests during treatments. I've run multiple valve leak tests with no failures, ziptied just about everything, tightened down both air separation chambers, verified balancing chamber membranes, verified internals of heat exchanger, replaced entire hydrochamber (including loading pressure reg, underside valve, sensor probe, and float), replaced the air separator chamber (#69), and both hansons. Tripled checked pressures, re-set boards, and checked for any corrosion in the bibag assembly board. Deaer brushes have been replaced, and its not due for flow brushes yet.
In dialysis mode, it runs perfect. Zero issues once the airlock has been broken. The air is always on the bibag hydraulics side, but tracking bubbles isnt working because there arent enough bubbles to trace through. Which leads me to believe its accumulating air in heat disinfect.
Beating my head against the wall with this one. Any tips?
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pacnw
Full Member
Posts: 187
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Post by pacnw on Feb 15, 2023 19:59:20 GMT
Air locks happen usually due to DPC staff techniques. usually caused byt them not plugging the acid or bicarb wand in all the way. I've had a machine or two give me fits too. After calibrating the pressure transducer(regulator pressure) by holding the lines level with the port and hitting enter, if that doesn't help i've swapped the acid or bicarb pump out to another machine to see if the pump is just weak. The pressure transducer #110. Could just be a bad transducer. We've all seen lots of failures with those.... Are you seeing 104/108 or 105 errors? 104/108 is your bicarb side 105 is your acid
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Post by Rookie on Feb 15, 2023 21:27:56 GMT
I can definitely appreciate the operator error, but this has been ongoing for over a month. Without fail it will airlock after a heat disinfect. Have only had the classic "104/108" error, which goes away after i relieve the airlock, and never comes up in dialysis after.
Worth saying I've ohm out of all the bibag valves, and replaced valve 101. I'll try replacing that transducer.
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pacnw
Full Member
Posts: 187
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Post by pacnw on Feb 16, 2023 16:28:38 GMT
One more question.... is there an acid rinse before heat?? If so make sure the DPC staff is filling the jug first. If the jug runs out of fluid this will cause your air lock after heat. Too many times we have machines pulled for the air lock and the problem was no citraclean in the jug. They didn't fill it up all the way. The machine then will go into heat automatically and after the heat disinfect the air lock alarms.
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Post by Rookie on Feb 16, 2023 20:08:50 GMT
Im 100% sure this isn't a staff issue. I've had it under maintenance for 4 days now, and have done a simulated treatment, pass all tests, then put it into heat disinfect only to have it be airlocked immediately after. I've done this 5 or 6 times now after trying new parts or possible fixes.
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BMF
Junior Member
Posts: 86
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Post by BMF on Feb 16, 2023 20:43:13 GMT
Have you tried running the machine back to back with a known good one to verify whether the electronics or hydraulics are the culprit?
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Post by angryazbiomed on Feb 21, 2023 18:23:36 GMT
One more question.... is there an acid rinse before heat?? If so make sure the DPC staff is filling the jug first. If the jug runs out of fluid this will cause your air lock after heat. Too many times we have machines pulled for the air lock and the problem was no citraclean in the jug. They didn't fill it up all the way. The machine then will go into heat automatically and after the heat disinfect the air lock alarms. Ive had this exact issue with a clinic with BiBag machines they would only fill it half way and the last 5-10 mins of the Acid rinse the machine would be sucking air, i brought the PCTs and RN and showed them the container had to be filled to the top and the topper with the 2 ports has to be used, not the wands dropped into the container after they saw it with their own eyes all the air that was being sucked in they started doing it correctly and the air locks stopped, for the most part. They still happen when they are to lazy to press the wands in until the click but a win is a win. |
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Post by just a BioMed on Mar 2, 2023 18:07:48 GMT
Check for acid crusties on the acid wand. It will read good but leaves enough gap for air to get in. With the new design of the wands they will fit wall and jug connections but the flat surface of the machine front causes the septation
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Post by Rookie on Mar 8, 2023 14:00:34 GMT
*** Fix ***
Bibag air separator (#111) solved the issue. Tightening down screws didn't help, and replacing the valve didn't help, had to replace the actual separator shell. Leak was small enough to never cause a problem during treatment, but the air built up in heat disinfect and caused airlocks in the bibag hydraulics.
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pacnw
Full Member
Posts: 187
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Post by pacnw on Mar 8, 2023 14:59:08 GMT
*** Fix *** Bibag air separator (#111) solved the issue. Tightening down screws didn't help, and replacing the valve didn't help, had to replace the actual separator shell. Leak was small enough to never cause a problem during treatment, but the air built up in heat disinfect and caused airlocks in the bibag hydraulics. Thanks for posting the FIX. I haven't seen a cracked air separator yet.... Good catch |
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