carl
New Member
Posts: 31
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Post by carl on Jul 15, 2024 18:44:56 GMT
Venous clamp is not closing to send PV Venous pressure up to creat alarm during blood side pressure test. Have verified clamp does open and close in TSM mode.
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Post by SrCusEngr on Jul 17, 2024 20:41:11 GMT
<carl> Need more information to accurately answer because different platforms will perform this test differently. There are also two parts to this general test. Part A is the bloodside pressure sensor test and part B is the bloodside leak test. So to better help us help you, provide a serial number and the software running on the unit.
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Post by thisjobisfun on Aug 28, 2024 18:15:55 GMT
<carl> Need more information to accurately answer because different platforms will perform this test differently. There are also two parts to this general test. Part A is the bloodside pressure sensor test and part B is the bloodside leak test. So to better help us help you, provide a serial number and the software running on the unit. I am having the same exact issue. BBraun CS had me try a few things, last is to reinstall the software which I haven't done yet since I don't have the dongle handy this second. I am currently in front of the machine and They made me swap the tiny board above the blood pump and test the clamp in service mode. I swapped the entire blood pump assembly as well. They are at a loss, well, the gentleman who was helping me is. It is a 710200S 9.1E SN 270660. During "Test Blood system" the sequence/test is as follows: LLC: 33300 LLS: 33013 LLC: 33301 LLS: 33013 LLC: 33302 LLS: 33013 Then finally fails at: LLC: 33302 LLS: 00002 As described by the original poster, the SAKV clamp never engages, but CAN be manipulated in test 1.5. Thanks, and let me know if there is anything else you need. |
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Post by SrCusEngr on Aug 28, 2024 22:43:19 GMT
<carl> <thisjobisfun> During "Test Blood system" the sequence/test is as follows: LLC: 33300 LLS: 33013 LLC: 33301 LLS: 33013 LLC: 33302 LLS: 33013 Then finally fails at: LLC: 33302 LLS: 00002
(This test is called the Blood Side Pressure Retention Test. If you want to follow along, refer to the current version [2022] of the Service Manual, page 189.) Note: x in the far right position of the LLC indicates the number of time a test is repeated.
Test code 33000. (US - no HDF)
LLC: 3302X Prerequisites: Blood Side not stopped by TLC or LLC. Message if stopped. LLS: No Active Code. May display 33000. No action.
Hidden: Test code 33 sent to LLS; LLS sends Test Code 33 back to LLC (no visual codes displayed)
LLC: 3300x Stop BPA
LLS: 33000 Test initialized. (The LLS code is used as a counter/timer only)
LLC: 3310x Set BPA to ramp up to delivery rate 200 mL/min. Open SAKV. Timeout 90 s since 33100 start.
LLS: 33001 Test SAKV is opened.
LLC: No code change
LLS: 33013 Test BPA delivery rate: 185 mL/min <BPA <215 mL/min. Acknowledge by closing SAKV and saving PV.
LLC: No code change
LLS: 33014 Test of BPA motor speed
LLC: 3330x Wait for PV . +400 mmHg for 500 ms during the running of BPA. (NOTE: Pressure reached: Stop BPA, close SAKV, open VBT. Initialize mean value storage for PA, PV, PBS* and PBE* {* not used in the US} Timeout 90 s since the start of 33100.
LLS: 33015-33023 Wait for PV >390 mmHg. No timeout
LLC: 3340x Evaluate every 250 ms continuous mean value of PA & PV. |PA-PV| </= 20 mmHg.
LLS: 33024-33025 Opened SAKV.
More steps
Since you indicated you are failing at 3330x (33302 means it was the third time it repeated), I'll take a guess you did not see what PV was doing as that is the major reason for failure. It must reach that 400 mmHg level.
Is the PV line fully seated into the manometer connector? I have heard some new lines are giving difficulties. Contact your sales rep if the lines are leaking around the PV connector.
How to check? Take some dish soap, make a batch of bubbles and put it on the connector just before the test. If more bubbles appear when SAKV clamps, you have a leak.
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Post by thisjobisfun on Sept 10, 2024 11:31:01 GMT
I apologize, I did not get a notification for the reply.
Anywho, Yes, I guess I wasn't clear. The SAKV NEVER clamps. So, Yes, I monitored the PV values. They do not reach 400 because it doesn't go up AT ALL. SAKV never clamps the line during test.
IN service mode I CAN successfully initiate the clamp on and off.
During test, if I manually press the sakv level onto the line, after a second or two it will "take" over and stay clamped. But it NEVER initiates on its own.
On an side note, we are having dozens of line issues that fail this very same test as of last month across multiple facilities. They eventually pass, so there definitely is a line issue on some Lot numbers.
Anyway, in summary, sakv NEVER clamps so fails because PV never rises. I've swapped over everything from a working machine EXCEPT the sakv mechanism itself, so far.
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Post by SrCusEngr on Sept 10, 2024 16:34:17 GMT
<thisjobisfun> From my post, earlier: LLC: 3310x Set BPA to ramp up to delivery rate 200 mL/min. Open SAKV. Timeout 90 s since 33100 start. LLS: 33001 Test SAKV is opened. LLC: No code changeLLS: 33013 Test BPA delivery rate: 185 mL/min <BPA <215 mL/min. Acknowledge by closing SAKV and saving PV.
The blue text is the set up. The green text is the next step. The fact that you can energize the clamp in test mode just means the clamp works. BUT - if the green test is NOT MET, then SAKV will not clamp. It is as stated in the service manual. How does it know the delivery rate?Hall sensors and magnets! The BP motor has an internal hall sensor. Also, the roller has magnets and that tiny circuit board above BPA contains a hall sensor that measures direction and rotation of the roller! I have seen dripping wet disinfect cloths saturating the gasket of the BPA assembly, seeping behind the gasket and destroying that tiny board. And be very careful removing it. It must be installed the exact same way as it came out.
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Post by thisjobisfun on Sept 10, 2024 18:39:04 GMT
<thisjobisfun> From my post, earlier: LLC: 3310x Set BPA to ramp up to delivery rate 200 mL/min. Open SAKV. Timeout 90 s since 33100 start. LLS: 33001 Test SAKV is opened. LLC: No code changeLLS: 33013 Test BPA delivery rate: 185 mL/min <BPA <215 mL/min. Acknowledge by closing SAKV and saving PV.
The blue text is the set up. The green text is the next step. The fact that you can energize the clamp in test mode just means the clamp works. BUT - if the green test is NOT MET, then SAKV will not clamp. It is as stated in the service manual. How does it know the delivery rate? Hall sensors and magnets! The BP motor has an internal hall sensor. Also, the roller has magnets and that tiny circuit board above BPA contains a hall sensor that measures direction and rotation of the roller! I have seen dripping wet disinfect cloths saturating the gasket of the BPA assembly, seeping behind the gasket and destroying that tiny board. And be very careful removing it. It must be installed the exact same way as it came out.
I swapped the tiny board to a working one, swapped the entire blood pump assembly, swapped pressure monitoring module, and verified no leaks. To no avail yet. |
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Post by kolev77 on Sept 11, 2024 6:16:09 GMT
<thisjobisfun> From my post, earlier: LLC: 3310x Set BPA to ramp up to delivery rate 200 mL/min. Open SAKV. Timeout 90 s since 33100 start. LLS: 33001 Test SAKV is opened. LLC: No code changeLLS: 33013 Test BPA delivery rate: 185 mL/min <BPA <215 mL/min. Acknowledge by closing SAKV and saving PV.
The blue text is the set up. The green text is the next step. The fact that you can energize the clamp in test mode just means the clamp works. BUT - if the green test is NOT MET, then SAKV will not clamp. It is as stated in the service manual. How does it know the delivery rate? Hall sensors and magnets! The BP motor has an internal hall sensor. Also, the roller has magnets and that tiny circuit board above BPA contains a hall sensor that measures direction and rotation of the roller! I have seen dripping wet disinfect cloths saturating the gasket of the BPA assembly, seeping behind the gasket and destroying that tiny board. And be very careful removing it. It must be installed the exact same way as it came out.
I swapped the tiny board to a working one, swapped the entire blood pump assembly, swapped pressure monitoring module, and verified no leaks. To no avail yet. |
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Post by kolev77 on Sept 11, 2024 6:16:43 GMT
Note whether the blood pump rpm matches the LLS reading. I had this problem a while ago, turned out to be a bad DB board. On SW 9.1B
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Post by SrCusEngr on Sept 12, 2024 17:51:58 GMT
<thisjobisfun> While it could be wiring or connectors not fully seated into the Basic Board, look at page 102 of the new service manual. This is the bible for where sensor inputs go. In the top, left corner of BB you have the connector for BPA. Right next to it is the connector for DZ/DR (Chapter 8, Figure 8.2.5) P48. DZ/DR is the BPA speed and rotation signal (from that small circuit board above BPA). On page 102, figure 4.24 on the left side of DB are BPA IMP and DIR. These must match up with BPA internal speed and direction. So check test 1.2 for discrepancies.
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