carl
New Member
Posts: 12
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Post by carl on Apr 1, 2024 20:58:58 GMT
This has happened twice on same machine during patient in 10 days. I am unable to duplicate in mock treatment. Bad arterial pressure sensor?
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Post by Chuck Weddle on Apr 1, 2024 21:12:58 GMT
Not likely since it was only twice in 10 days. Mostly likely the arterial POD wasn't positioned correctly. I would however make sure that the internal filter isn't wet. In the past, we've had staff connect the heparin line to the port.
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carl
New Member
Posts: 12
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Post by carl on Apr 1, 2024 22:30:16 GMT
Thanks. It’s been a hard problem to troubleshoot..
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Post by biomedpete on Apr 2, 2024 13:04:03 GMT
We have had issues similar. The Arterial pressure would stay at zero during testing and fail. Staff would disconnect the line and retest then it would pass and complete set-up and then treatment.
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Post by SrCusEngr on Apr 2, 2024 16:02:46 GMT
I hate saying this over and over, but what software version machine are you talking about? V8's work differently than V9's. And since we can't see your machine, it is improper to assume.
V8 - testing is done electronically. No pressures involved. Clamp after pump rotates 4.5 revolutions. Monitoring via a single pressure sensor. Wet internal transducer protector or cracked manometer connector will cause a zero reading.
V9 - testing is performed with pressure applied to PV and then switch to PA circuit via VBT. Therefore, in TSM, you can test by exercising VBT. Note: you can also test for pressure loss of your circuit. Ensure your test jig T is lossless (or as low loss as possible). Syringe, meter and luer lock to manometer connector (PV/PA). Apply +300 mmHg and clamp at connector. Open wrench and monitor sensor for 2 minutes. Loss should be less than 20 mmHg. If loss is greater, check all components and tubing connections for possible leaks.
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