Cozmo: blocked tube alarm fault?

[Fred&CharlesFan]

Cozmo 1700.

Failure to provide a blocked tube alarm.

Noticed over the course of this AM, BG was real high following 2 hr post-breakfast check.
That was odd; maybe that wee nip of a choc.cake and pepperoni stick with no bolus had a MUCH bigger impact than I thought. OK. Noted.
Take Correction bolus.
PostCorrection 120 minute check.
BG is even higher!! WTH??!!! Suspect delivery failure.
Attempt to push some insulin out of the existing tube, using the Load / Fill Tubing option. Pump gives me a blockage error.
OK. Great! In view of my BG in the last 3.5 hrs, no surprise..!!

Replace tubing, fill tubing, give 2nd correction bolus.

Question: should I not have received that blockage alarm at some point following the: 1) meal bolus or 2) the 1st correction bolus or 3) during the basal delivery over the last 3.5hrs?

[Funnygrl]

It depends on how much insulin was backed up. I believe it has to be 5 units or so before it alarms. Also, if some of it was getting through, it probably won't alarm. Blockage detected alarms are nice, but not a substitute for vigilence and common sense. Two highs in a row that aren't coming down, and you should change it, regardless of alarm or not.

[solox316]

9 years on 3 different pumps and I have only gotten 1 blockage alarm. Your own attention is probably a better indicator, as Funnygrl said.

I usually give an injection and change the site if I suspect a simliar problem to yours.

[notme]

Five units is a lot of insulin before you are notified. I always assumed you would get alarmed no matter how much insulin tried to go through the canula and couldn't. Interesting.......

[Rexy]

My husband has a Cozmo and he has gotten several blocked tubing alarms. His bs is never sky high when he gets the alarm, so I'm assuming that when it is blocked, it alarms.

[JediSkipdogg]

The pump alarms to a blockage when it hits 23 psi of pressure required to push the insulin through the tubing. Their manual estimates that it takes 4 units of blocked insulin to set the blockage alarm off. That would be for a total blockage. If there is only say a 50% blockage, then it may never go off for a basal but will go off for a bolus. According to their manual the estimated time for a blockage alarm based on basal rates is....

5 u/hr: 24-48 seconds
2 u/hr: 1-3.9 hours
.05 u/hr: 37-74 hours

[4RDUKE]

My son uses the Cozmo and he gets a blockage I would say once every two weeks and it can be anything from the tubing twisted to the infusion set being blocked by body tissue.

We have had blockage for bolus, corrections and anytime insulin is being pumped and blocked. We have did the tubing check and just changed his infusion and back to rocking and rollin.

Remember that this is only a tool and does not remove you from listening to your body and really managing this disease for your long term health. That is also a father without diabetes talking but my wife is type 2 no insulin dependent and controls a lot by diet.

If you call customer service they can also tell you what all the alarms stand for or at least they have for us. We have an active son and he is definitely a test pilot for his pump and its stands strong.

[egi]

Used to get many blockage alarms while using the Cozmo with
Cleo infusion sets. This stopped happening when we moved to
the Inset infusion sets.