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[IPu] FW: [diabetescgms] Our first 48 hours on the Navigator (long)

Hi All,

Thought those looking at GMS might like this .

Hope you are all having a good weekend.




From: email @ redacted [mailto:email @ redacted] On
Behalf Of mitchlerner
Sent: Friday, 20 June 2008 2:47 AM
To: email @ redacted
Subject: [diabetescgms] Our first 48 hours on the Navigator (long)


We have now been Navigating for almost 48 hours. Julia, age 11, is wearing
hers on her 
belt, with the site in her abdomen. Max (age 7) still has his in the box as
we want to be 
sure we have a handle on the system before putting them on both kids. Some
and then some questions:

This thing is amazing. Really, truly astounding. It is not just the ability
to look at Julia's 
belt and see her number; there are other benefits that I had not fully
appreciated. I already 
love it more than I love most members of my immediate family, but of course
that is not 
saying much.

One great feature that I had not fully appreciated is the directional arrow,
which tells you, 
based on the last 30 minutes of readings, if you are stable, rising fast or
slow, of falling 
fast or slow. This feature is incredibly accurate, more so even than the BG
readings. So, for 
example, 90 minutes ago, Julia was 92 with a bit of insulin on board. In our
house, that 
would normally merit a few grams of carbs, but the arrow was pointing
directly sideways, 
meaning her numbers were stable, so I did nothing. And right now, she is 91.
Sure, it is a 
small thing, but every hour that I can keep her BS at 90 is a good hour.

The ability to see her blood sugar after she eats is also proving very
helpful to figuring out 
her bolus. I am learning that we have been bolusing too much at many times
of the day. 
So, for example, we had Chinese food last night. I thought Julia had 35g of
carbs, but I 
didn't bolus her right away, as we usually do, since I wanted to see the
impact of the food 
on her BS. So, ten minutes after she ate she was only 125, but was starting
to rise, so I 
gave her only a 20g bolus since her number was still lower than I had
expected, and it 
worked out to be the perfect amount.

Another great feature is the reports option. It will give a linear graph of
the last 2 hours, 4 
hours, etc. It will also give a BG history of every test done in the past,
at 10 minute 
intervals. So, we have always had a problem with Julia needing juice in the
period, and I am always tinkering with the settings on the pump to try to
fix it, but never 
really solved it. Now I can see that at 2:40 AM the decline begins, and
lasts until about 
4:50. I have already adjusted pump settings accordingly.

We have not had much experience with the alarm systems, since Julia's
numbers have 
been amazingly good since we started. But we did have one experience with it
that was 
positive. The Navigator was reading 160, but it sounded its low blood sugar
meaning that it was projecting she would be low in 30 minutes. Sure enough,
20 minutes 
later she was 89 and we were able to treat it before it got too low. And in
case you worry 
about the alert volumes not being loud enough, trust me, that will not be a
problem. In 
fact, last night the alarm woke me up at 6:30 AM, even though I was down the
hall with a 
fan running.

And of course, the continuous numbers are a godsend. Sent Julia off the
library yesterday 
by herself, and for ice cream with her grandma without nearly the
trepidation we usually 
have. At softball last night she did not wear the receiver, since she said
it restricted her, 
but instead of her having to test in the dugout she just walked over to us
every few 
innings and chatted for a moment, letting the receiver link up with the
sensor, and we 
could get the info that way.

But, we have had a few problems, and I wonder if people who have been using
the system 
for a while have any advice. The biggest one is that we seem to lose the
between the transmitter and the receiver sporadically. It never happens when
Julia is 
wearing it on her belt, but if I move the receiver 3 feet away we will get
the lightning bolt 
symbol meaning we have lost the connection. It almost always links up again
on its own, 
within a minute or two, but twice I have had to do it through the system
itself. In theory 
the thing has a range of 10 feet, and most people say they can get 15 or
even 20. But ours 
seems to be having communication problems. Thoughts?

And then the lag between the interstitial blood and the regular fluid is
throwing me a bit. 
Julia's Navigator numbers are generally close to her finger test numbers,
but they can be 
off by as much as 30 points. This seems to be a problem with the low BG
alarm; yesterday 
she was 83 according to the Navigator and had been slowly declining from
about 110, but 
she said she felt low, and a finger test put her at 58. So why didn't the
Navigator alarm to 
tell me she was heading low?

And does it help to calibrate to do finger tests in the built-in test kit in
the Navigator? 
People have said that the readings get better when the sensor is in longer,
but I don't 
know if that requires extra tests to help calibrate. And, if you do extra
tests, do you 
choose the "caiibrate" option in the meter to force it to ask for you to
test, or do you just 
do the test.

Also swimming. The manual says not to wear the sensor for swimming in more
than 3 feet 
of water. That is hard; my daughter is a fish in the summer. What are people
doing about 
this? Can we put tape over the sensor and swim anyway? Is there a way to
remove and then 
re-insert the sensor? Any suggestions would be appreciated.




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