kimi
New Member
Posts: 11
|
Post by kimi on Apr 18, 2022 3:49:19 GMT
Hello everyone
I have one question about the LRM. After the blood side pressure test the protector and the HFA usually get wet and the test failure. Sometimes water even goes into the VPV valves. Is it because the blood chamber level too high？How to avoid this situation？
Best regards
|
|
|
|
Post by Chuck Weddle on Apr 18, 2022 8:38:39 GMT
kimi,
I'm not familiar with LRM, HFA, and VPV. It sounds like you're having an issue with failing the blood side pressure test because of saline backing up into the pressure lines, correct?
If so, there is a problem in the A/V level block. Pressurize the ports just as you would if you were calibrating them and track down the leak.
Chuck
|
|
kimi
New Member
Posts: 11
|
LRM issue
Apr 18, 2022 11:54:46 GMT
via mobile
Post by kimi on Apr 18, 2022 11:54:46 GMT
kimi, I'm not familiar with LRM, HFA, and VPV. It sounds like you're having an issue with failing the blood side pressure test because of saline backing up into the pressure lines, correct? If so, there is a problem in the A/V level block. Pressurize the ports just as you would if you were calibrating them and track down the leak. Chuck LRM (Level Regulation module) Yes, you are right. HFA is the filter behind the VP port, I saw the video about the dialog+ priming, they always make the blood chamber full, but the saline would backing up into the filter even the valves very often and fail the test. So you mean that’s because there is a leak in the A/V level block？The saline will not backing up to the pressure line even the chamber is full if there is no leak in the A/V block, is that what you mean？ Best regards |
|
|
|
Post by Chuck Weddle on Apr 18, 2022 12:11:17 GMT
kimi,
The only time the venous chamber should be full is if they are using Streamline blood lines. Streamlines have a pressure "pod" that for the venous line is located as soon as the blood leaves the dialyzer. The pod has a impervious silicone membrane that will keep saline from backing up the pressure line and getting to your HFA/LRM.
Do your lines have pods or does the pressure line come from the top of drip chambers?
Chuck
|
|
|
|
Post by Travis CHBT on Apr 18, 2022 12:20:41 GMT
At one of my clinics staff was connecting the heparin line to either PA or PV and leaving the clamp open which was causing the filter to get wet. Staff was also over tightening PV line causing it to crack and fail test/TMP. You can tell if PA/PV manometer is cracked by doing test as Chuck mentioned.
|
|
kimi
New Member
Posts: 11
|
LRM issue
Apr 18, 2022 12:21:05 GMT
via mobile
Post by kimi on Apr 18, 2022 12:21:05 GMT
kimi, The only time the venous chamber should be full is if they are using Streamline blood lines. Streamlines have a pressure "pod" that for the venous line is located as soon as the blood leaves the dialyzer. The pod has a impervious silicone membrane that will keep saline from backing up the pressure line and getting to your HFA/LRM. Do your lines have pods or does the pressure line come from the top of drip chambers? Chuck Yes, our line comes directly from the top of drip chamber without the Pod. |
|
kimi
New Member
Posts: 11
|
LRM issue
Apr 18, 2022 12:37:55 GMT
via mobile
Post by kimi on Apr 18, 2022 12:37:55 GMT
At one of my clinics staff was connecting the heparin line to either PA or PV and leaving the clamp open which was causing the filter to get wet. Staff was also over tightening PV line causing it to crack and fail test/TMP. You can tell if PA/PV manometer is cracked by doing test as Chuck mentioned. Thanks for your reply. I’m sure that the PV port doesn’t cracked. The test fail because the saline in the drip chamber backing up to the PV during the pressure test and wet the filter. I believe it’s because the tubing we used have no pod for the drip chamber as Chuck said. So do I need to make the drip chamber half full to avoid this？ |
|
joey
Full Member
Posts: 228
|
Post by joey on Apr 18, 2022 12:40:25 GMT
It sounds like there is a leak, past the manometer on the door of machine. Usually you change the manometer and change the internal transducer with new tubing and you are good to go. Make sure you check your pressure with an external meter after you do so and also inspect tubing near the sensor to make sure moisture did not go past the internal transducer.
|
|
|
|
Post by Chuck Weddle on Apr 18, 2022 12:45:05 GMT
kimi,
Yes, you need to have a cushion of air in the chambers. It still wouldn't hurt to check the LRM for leaks. We have had quite a few develop leaks after a couple of years.
Chuck
|
|
kimi
New Member
Posts: 11
|
Post by kimi on Apr 18, 2022 13:16:26 GMT
kimi, Yes, you need to have a cushion of air in the chambers. It still wouldn't hurt to check the LRM for leaks. We have had quite a few develop leaks after a couple of years. Chuck OK I’ll check the LRM just in case. thanks |
|
|
|
Post by Admin on Apr 18, 2022 15:09:41 GMT
I'm going to go on a limb here and say based on the LRM, Kimi isn't from the USA. So that's pretty awesome we reached internationally if that's the case.
Kimi - I don't believe you're using Streamline Bloodlines so that's different. I wouldn't leave the chamber completely full. I would though apply pressure to PA, PV, and PBE and clamp the syringe to make sure it holds and doesn't leak. I expect the pressure to "settle out" but go grab a coffee and come back. If it drops 1 mmHg every couple of seconds, something is leaking and that should be dealt with first before anything.
|
|
kimi
New Member
Posts: 11
|
Post by kimi on Apr 18, 2022 16:41:13 GMT
I'm going to go on a limb here and say based on the LRM, Kimi isn't from the USA. So that's pretty awesome we reached internationally if that's the case. Kimi - I don't believe you're using Streamline Bloodlines so that's different. I wouldn't leave the chamber completely full. I would though apply pressure to PA, PV, and PBE and clamp the syringe to make sure it holds and doesn't leak. I expect the pressure to "settle out" but go grab a coffee and come back. If it drops 1 mmHg every couple of seconds, something is leaking and that should be dealt with first before anything. Yes, that’s how I test the leakage of LRM as well. And leave the drip chamber half full is the way I use to prevent the saline up to pressure line now. Thanks for your advise. Hope I can learn a lot more in this forum. Best regards |
|
|
|
Post by SrCusEngr on Apr 27, 2022 21:40:25 GMT
There is a graphic outline on the door of the line set. Above SAKV is a diagram of a standard bloodline bubble chamber. The horizontal line is used to indicate the appropriate blood level in the chamber. NOTE: not for Streamlines!
ADMIN: yes, there are LRM machines in the US.
|
|
|
|
Post by Admin on Apr 28, 2022 13:54:41 GMT
Thanks! I haven't seen one in a while  |
|
kimi
New Member
Posts: 11
|
LRM issue
May 7, 2022 12:02:48 GMT
via mobile
Post by kimi on May 7, 2022 12:02:48 GMT
There is a graphic outline on the door of the line set. Above SAKV is a diagram of a standard bloodline bubble chamber. The horizontal line is used to indicate the appropriate blood level in the chamber. NOTE: not for Streamlines! ADMIN: yes, there are LRM machines in the US. SrCusEngr Thanks for the reminder. |
|
