Libre Graph and Hypo

[MarkGeordie]

I woke up this morning and looked at the graph that shows up and it shows I had a hypo during the night, but I never woke up at all I slept right through and I’ve woke to a BG of 8.9.

Very intetesting

 

[Amity Island]

I woke up this morning and looked at the graph that shows up and it shows I had a hypo during the night, but I never woke up at all I slept right through and I’ve woke to a BG of 8.9.

Very intetesting

Hi Mark,
Would you be able to attach a picture of the graph from last night? What were the readings? How long was it below 4 for?

 

[MarkGeordie]

Hi Mark,
Would you be able to attach a picture of the graph from last night? What were the readings? How long was it below 4 for?

Im partially sighted, I struggle enough reading the thing, I’d struggle to post a picture, what if I tell you the numbers and times?

 

[Amity Island]

Im partially sighted, I struggle enough reading the thing, I’d struggle to post a picture, what if I tell you the numbers and times?

Hi Mark, yes, the numbers and times would be helpful. Thanks.

 

[MarkGeordie]

Hi Mark, yes, the numbers and times would be helpful. Thanks.

Yes of course,

Between the hours of 3am to 6am, I went from just under 9 to 2.5. Then it started to climb again and I woke up at 7.45am and I was 8.9.

 

[Amity Island]

Yes of course,

Between the hours of 3am to 6am, I went from just under 9 to 2.5. Then it started to climb again and I woke up at 7.45am and I was 8.9.

Hi Mark, that looks to me like a definite hypo as it lasted a long time. I was trying to make sure it wasn't a "compression hypo" from laying hard on the sensor on the arm.
Are you on m.d.i? If so, what time did you take your last injection for a meal? You need to find out if the hypo was caused by too much basal insulin or from too much meal Time insulin (bolus) or a combination of too much of both.

 

[MarkGeordie]

Hi Mark, that looks to me like a definite hypo as it lasted a long time. I was trying to make sure it wasn't a "compression hypo" from laying hard on the sensor on the arm.
Are you on m.d.i? If so, what time did you take your last injection for a meal? You need to find out if the hypo was caused by too much basal insulin or from too much meal Time insulin (bolus) or a combination of too much of both.

Yes MDI.

My last meal was at 6.30pm and I had my long lasting insulin at 10.30pm.

Not sure if it matters but I had a moment between 1 and 2am where there is a gap on the graph. Not sure why?

 

[Amity Island]

Yes MDI.

My last meal was at 6.30pm and I had my long lasting insulin at 10.30pm.

Not sure if it matters but I had a moment between 1 and 2am where there is a gap on the graph. Not sure why?

Hi Mark,
It's quite handy knowing your last meal was at 6.30. Most short acting insulins last up to 6hrs. By 12.30 all of the mealtime short acting insulin would have finished before 12.30am. leaving only the basal working during the night.
For me if this happened I'd be considering reducing the basal insulin by a small amount, like 1 unit and then I'd see what happens again for the next few nights. If it's still dropping, then again I'd try dropping my basal by another unit. Basically until it holds level through the night.
However, I've read many posts on here about basal requirements changing across a full 24hrs. One could sort the night time low, but then find the day time basal results start increasing.
Tbh, it's all trial and error and everyone is different.

 

[Ivostas66]

Yes MDI.

My last meal was at 6.30pm and I had my long lasting insulin at 10.30pm.

Not sure if it matters but I had a moment between 1 and 2am where there is a gap on the graph. Not sure why?

A gap on the graph is usually caused by falling outside of the 8 hour window (at least I think it is 8 hours!) The sensor stores 8 hours of data and so if you go longer than 8 hours without scanning there will not be data. If that is the case then a gap at 1am would suggest you did not scan from 5pm - is this the case?

 

[rebrascora]

Hi Mark, it may be that your BG was not as low as the Libre suggested.
I woke up at 3.45am this morning and my Libre showed I was 2.4. I jumped out of bed in panic and then thought "I don't feel hypo" and a finger prick a few seconds later showed I was only 4.1 but it was dropping and I needed to take nearly 2 hypo treatments to take it up to a safe level.... This is my first Libre sensor but it has happened a few times in the last few days. My insulin requirements are reducing though as a result of this hot muggy weather so I am not disputing my BG dipped but just no where near as low as the Libre indicated.
It would be worth reducing your basal insulin tonight if you are able and going to bed with a higher reading than you might otherwise.

 

[MarkGeordie]

A gap on the graph is usually caused by falling outside of the 8 hour window (at least I think it is 8 hours!) The sensor stores 8 hours of data and so if you go longer than 8 hours without scanning there will not be data. If that is the case then a gap at 1am would suggest you did not scan from 5pm - is this the case?

Yeah I think I was told about the 8 hour window however I scanned at around 11.45pm just as I went to bed.

 

[MarkGeordie]

Hi Mark, it may be that your BG was not as low as the Libre suggested.
I woke up at 3.45am this morning and my Libre showed I was 2.4. I jumped out of bed in panic and then thought "I don't feel hypo" and a finger prick a few seconds later showed I was only 4.1 but it was dropping and I needed to take nearly 2 hypo treatments to take it up to a safe level.... This is my first Libre sensor but it has happened a few times in the last few days. My insulin requirements are reducing though as a result of this hot muggy weather so I am not disputing my BG dipped but just no where near as low as the Libre indicated.
It would be worth reducing your basal insulin tonight if you are able and going to bed with a higher reading than you might otherwise.

Yeah I was thinking along those lines too, if it has woken me up I would have double checked with my meter but I just slept right through.

I am going to reduce my injection dosage tonight at half 10 just as a precaution.

 

[Amity Island]

Yes MDI.

My last meal was at 6.30pm and I had my long lasting insulin at 10.30pm.

Not sure if it matters but I had a moment between 1 and 2am where there is a gap on the graph. Not sure why?

Hi Mark,

There are only 4 reasons I know of why there would be a gap in the libre graph.

1. Faulty Sensor
2. The sensor hasn't been scanned in over 8 hours
3. The sensor has been changed and is callibrating for an hour
4. There is rapidly changing blood glucose from sudden and large drops in blood glucose e.g too much insulin or exercise (or perhaps rapidly increasing blood sugar?)

In your case I wouldn't like to guess, it's unusual to happen whilst asleep. Sometimes you get a failure code. If you go to the menu on the scanner and look into setting (cog wheel symbol top right hand corner), click down to system status, go into that then into event log. There will be a code for the time there was a miss in the graph. You could ring abbott and ask them what it means.

 

[trophywench]

Mark - are you on Lantus?

 

[MarkGeordie]

Mark - are you on Lantus?

No, I’m on Levemir.