Author Topic: Carb ratios  (Read 299 times)

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Offline Lucy

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Carb ratios
« on: 25 September 2018, 09:26:01 PM »
After discussion with dr yesterday I really need to change my ratios from 1:10. I’ve known that for a while but just get nervous to try things, plus it’s so much easier to divide by 10 than 9 or 8.


So I was wondering... I’ve only ever heard of people changing ratios so eg using 1:9 instead of 1:10. Is there any reason why it’s done this way for those on MDI? It would be easier to stick to 1:10 to calculate dose for ease of maths in head, then add 10%, so for every time it gets near 5u just add an extra half. But I’ve never heard anyone else doing that, is there any reason it’s preferred to divide by 9 (or whatever number)? Presume I’d get to the same result either way?


Thinking I must be missing something.
Type: Lucy.
Lantus and Apidra. Metformin XR, Propanolol

Offline Liam

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Re: Carb ratios
« Reply #1 on: 25 September 2018, 11:00:09 PM »
A lot of the talk about carb ratios are from people on pumps. On MDI as you say by the time you have rounded you likely end up pretty close. You need to be eating a good amount of carb for 1:10 to be much different from 1:9.

I never really did much out of the norm of 1:10 on MDI. The fact I was trying too was part of the reason I got a pump.

I hope someone that did it more and remembers better will post with some better advice that I have to offer.

I did use my phone as a calculator for ratios but I know that is just one more thing. Not sure about your meter or choice of meter, but isn't there one that does insulin calculations as well as read BGs?
DX Type I 1994.    Novorapid Animas Vibe pump
HbA1c 3/10 10.2%, 7/10 8.1%, 12/10 7.5%.
2/11 7.8%, 8/11 8.6% 9/11 8.3%.
3/12 62 (7.8%). 10/12 67 (8.3%)
4/13 63 (7.9%) 6/13 59 (7.5%)
1/14 71 (8.6%) 7/14 59 (7.5%) 11/14 (6.7%)
3/15 56 (7.3%) 12/15 49 (6.6%)
Ramipril: 10mg Quetiapine: 550mg Metformin: 2000mg

Offline Lucy

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Re: Carb ratios
« Reply #2 on: 25 September 2018, 11:11:21 PM »
Yeah, well I’m just guessing that it’s 1:9 I try next, we agreed I should try more insulin with changing the ratio but didn’t decide an actual amount to try next. I easily come to 5u most meals though as usually have 30/40 carbs a meal at least plus am usually high at the moment and been using 1u drops 2mmol. Have increased lantus though so may come down, just agreed I would increase everything and experiment more with doses.
Type: Lucy.
Lantus and Apidra. Metformin XR, Propanolol

Offline Liam

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Re: Carb ratios
« Reply #3 on: 26 September 2018, 12:51:43 AM »
I've been thinking (might be dangerous) but have you got a half unit pen? I was wondering if you could do 1.5:10 ?

The maths for that is pretty simple. It might be too big a jump? Insulin really is pretty blunt when you have to round to 1 or 0.5 units.
DX Type I 1994.    Novorapid Animas Vibe pump
HbA1c 3/10 10.2%, 7/10 8.1%, 12/10 7.5%.
2/11 7.8%, 8/11 8.6% 9/11 8.3%.
3/12 62 (7.8%). 10/12 67 (8.3%)
4/13 63 (7.9%) 6/13 59 (7.5%)
1/14 71 (8.6%) 7/14 59 (7.5%) 11/14 (6.7%)
3/15 56 (7.3%) 12/15 49 (6.6%)
Ramipril: 10mg Quetiapine: 550mg Metformin: 2000mg

Offline himtoo

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Re: Carb ratios
« Reply #4 on: 26 September 2018, 07:27:09 AM »
hi there --- i was going to ask if you have a 1/2 unit pen for
bolus too as that does make it a bit easier

so now down to the maths------------assuming a 40 carb meal---1:10 =4u at 1:9 it =4.44u so would be rounded to 4.5 ( making the actual working ratio 1:8.89 )
so 1:8 = 5u

realistically with a 1u pen you can only work in the ratios that a 1u pen affords
1:40 = 1u
1:20 =2u
1:13.33 = 3u
1:10 = 4u
1:8 = 5u
1:6.66 = 6u
1:5.71 = 7u
1:5 = 8u
T1 Dia Aug 1972 -pumping omnipod since 29/09/15  Losartan 100mg , simvastatin 40mg,Furosemide 40mg, Omeprazole 80mg , Doxazosin 8mg
Hba1c - 02/2014 43(6.1) 07/14 42(6.0) 08/14 40( 5.8 ) 12/14 39 (5.7) 08/15 41 ( 5.9) 10/15 44 ( 6.2 ) 03/16 49 (6.6) 04/18 46 (6.4)
cholesterol --nov 2011 4.3 june 2012 4.4 June 2013 4.1 Feb 2014 4.1 dec 14 4.5 oct 15 4.4
Dafne grad. necrobiosis lipoidica on legs
laser treatment on both eyes 2002 and 2012, injections left eye 3 , wearing Noctura mask since oct 2014

Offline Lucy

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Re: Carb ratios
« Reply #5 on: 26 September 2018, 08:04:00 AM »
I have the juniorstar pen which does half units. Good idea with 1.5:10 that's probably easier maths than 1:8 or whatever.
Type: Lucy.
Lantus and Apidra. Metformin XR, Propanolol

Offline Pattidevans

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Re: Carb ratios
« Reply #6 on: 26 September 2018, 09:03:11 AM »
By the time I got any kind of ratios, given the fact that I was treated as a T2 for many years and given little help or education, I managed to get myself an Insulinx meter which did the calculation for me.  I subsequently got an Accu-check Expert meter which did the same prior to being on a pump.  Maths is very much my weak point, if I didn’t have a fancy meter I’d never eat hot food again as it’d take me so long to work out 1:6 before noon and 1:8 for the rest of the day, by which time my food would have gone cold!  Any mileage in you asking for one of those meters?


Good luck with it Lucy.
Patti


Type 1.  Mis-diagnosed T2 May 2003, finally had CPeptide test 15/7/11 and proper diagnosis 1/9/11.  Now pumping Apidra with Roche Spirit Combo pump. Hba1c 6.1 Sept 2017.  45 (6.3) April 2018.


© 2015 Patti Evans

Offline himtoo

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Re: Carb ratios
« Reply #7 on: 26 September 2018, 10:28:04 AM »
i know we are all different and IMO the HCP's dont really emphasise enough about getting ratios right........i have heard of those meters that calculate for you but never seen one in action..........sounds like a great product !!
T1 Dia Aug 1972 -pumping omnipod since 29/09/15  Losartan 100mg , simvastatin 40mg,Furosemide 40mg, Omeprazole 80mg , Doxazosin 8mg
Hba1c - 02/2014 43(6.1) 07/14 42(6.0) 08/14 40( 5.8 ) 12/14 39 (5.7) 08/15 41 ( 5.9) 10/15 44 ( 6.2 ) 03/16 49 (6.6) 04/18 46 (6.4)
cholesterol --nov 2011 4.3 june 2012 4.4 June 2013 4.1 Feb 2014 4.1 dec 14 4.5 oct 15 4.4
Dafne grad. necrobiosis lipoidica on legs
laser treatment on both eyes 2002 and 2012, injections left eye 3 , wearing Noctura mask since oct 2014

Offline Pattidevans

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Re: Carb ratios
« Reply #8 on: 26 September 2018, 02:50:08 PM »
I found both of those meters very good when I was on MDI.  You set your own ratios and they can calculate to the nearest half unit.  Useless if you’re on a pump of course, because you can calculate in 10ths of a unit with most pumps.

Patti


Type 1.  Mis-diagnosed T2 May 2003, finally had CPeptide test 15/7/11 and proper diagnosis 1/9/11.  Now pumping Apidra with Roche Spirit Combo pump. Hba1c 6.1 Sept 2017.  45 (6.3) April 2018.


© 2015 Patti Evans

Offline GrammaBear

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Re: Carb ratios
« Reply #9 on: 26 September 2018, 03:04:03 PM »
When I was on MDI, I had a small calculator on the dining room table where we ate most of our meals.  And before every meal I sat down with my plate of food already hot and measured (because I used to weigh everything) and figured out how much insulin to use in my jab.  I had more meals cold that hot most days.  I liked the half unit pens when they became available and I never went back to the whole unit ones.  Now that I have a pump I had my doctor write a prescription for half unit syringes for those times when my blood glucose is high and I need to inject insulin as soon as possible.  Good Luck Lucy, you can do it.  Small changes at one time might feel more comfortable.
Type 1
Tandem Tslim pump Oct 2015
Dexcom G5 CGM Sep 2007
A1C 6.3% ~ Sep 2018

Offline Lucy

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Re: Carb ratios
« Reply #10 on: 26 September 2018, 06:27:04 PM »
By the time I got any kind of ratios, given the fact that I was treated as a T2 for many years and given little help or education, I managed to get myself an Insulinx meter which did the calculation for me.  I subsequently got an Accu-check Expert meter which did the same prior to being on a pump.  Maths is very much my weak point, if I didn’t have a fancy meter I’d never eat hot food again as it’d take me so long to work out 1:6 before noon and 1:8 for the rest of the day, by which time my food would have gone cold!  Any mileage in you asking for one of those meters?


Good luck with it Lucy.

I’ve got an appointment next month (with a dsn, not met yet them yet), I could ask then if I’m having trouble. Having more frequent appointments at the moment which is helpful, one a month for now. To be honest today I just added half a unit whenever my dose came to 4 or more units, which is probably easiest way to think of it. 1.5:10 was surprisingly tricky in my head first thing this morning when I was having 25g carbs, bg of about 11, and hadn’t yet woken up!
Type: Lucy.
Lantus and Apidra. Metformin XR, Propanolol

Offline Pattidevans

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Re: Carb ratios
« Reply #11 on: 26 September 2018, 10:55:23 PM »
What I really like about having a meter that does it for you (eg my pump handset or one of the meters I mentioned earlier) is that they take into account the level you are currently at and any insulin still active in your body, now those two things are very hard to calculate on top of the ordinary math of how much for how many carbS.  Lucy, you need one of those meters.
Patti


Type 1.  Mis-diagnosed T2 May 2003, finally had CPeptide test 15/7/11 and proper diagnosis 1/9/11.  Now pumping Apidra with Roche Spirit Combo pump. Hba1c 6.1 Sept 2017.  45 (6.3) April 2018.


© 2015 Patti Evans

Offline Lucy

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Re: Carb ratios
« Reply #12 on: 27 September 2018, 01:51:36 PM »
Good point about the corrections and iob being taken into account, that is very useful as i can’t do that in my head, though i tend only to correct at meal times. The mySugr app does it too, but I tend not to enter everything into it, and it can’t account for the quick correction you calculated in your head but didn’t tell it about. Having a go at using the app today, I’ll ask about the other meter options at DSN appointment.
Type: Lucy.
Lantus and Apidra. Metformin XR, Propanolol

Offline plumb

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Re: Carb ratios
« Reply #13 on: 27 September 2018, 03:48:30 PM »
The Libre meter does this for you if it is used for blood test not for the scanning. Just go into professional option to set it up.
T1 DX1977 pumping Novorapid  and 3 BP Medds s