mySugr Bolus Calculator Version: 3.0.16_Android – 2021-10-25 User Manual
- June 6, 2024
- mySugr
Table of Contents
mySugr Bolus Calculator
User Manual
Version: 3.0.16
Android – 2021-10-25
Indications for use
1.1 Intended use
The mySugr Bolus Calculator, as a function of the mySugr Logbook app, is
intended for the management of insulin-dependent diabetes by calculating a
bolus insulin dose or carbohydrate intake based on therapy data of the
patient. Before its use, the intended user performs a setup using patient-
specific target blood glucose, carbohydrate to insulin ratio, insulin
correction factor, and insulin acting time parameters provided by the
responsible healthcare professional. For the calculation, in addition to the
setup parameters, the algorithm uses current blood glucose values, planned
carbohydrate intake, and the active insulin which is calculated based on the
insulin action curves of the respective insulin type.
1.2 Who is the mySugr Bolus Calculator for?
The mySugr Bolus Calculator is designed for users:
diagnosed with insulin-dependent diabetes aged 18 years and above treated with
short-acting human insulin or rapid-acting analog insulin undergoing
intensified insulin therapy in the form of Multiple Daily Injections (MDI) or
Continuous Subcutaneous Insulin Infusion (CSII) under the guidance of a doctor
or other healthcare professional who are physically and mentally able to
independently manage their diabetes therapy able to proficiently use a
smartphone
1.3 Environment for use
As a mobile application, the mySugr Bolus Calculator can be used in any
environment where the user would typically and safely use a smartphone.
Contraindications
2.1 Circumstances for bolus calculation
The mySugr Bolus Calculator can not be used when:
the user’s blood glucose is below 20 mg/dL or 1.2 mmol/L the user’s blood
glucose is above 500 mg/dL or 27.7 mmol/L the time of the log entry containing
input data for the calculation is older than 15 minutes
2.2 Insulin restrictions
The mySugr Bolus Calculator may only be used with the insulins listed in the
app settings and must especially not be used with either combination or long-
acting insulin.
The mySugr Bolus Calculator must only be set up and used with a single insulin
type. Multiple insulin use is not permitted with this device.
Warnings
3.1 The mySugr Bolus Calculator does not replace professional medical
advice
The mySugr Bolus Calculator is used to support the treatment of diabetes,
however, it cannot replace regular visits to a doctor/diabetes care team. You
still require a professional and regular review of your long-term blood sugar
values. You are responsible for continued self-management of your blood sugar,
independent of the use of the mySugr Bolus Calculator.
Review and optimization of the mySugr Bolus Calculator parameters should be
carried out during regular doctor visits.
3.2 The mySugr Bolus Calculator depends on you inputting the correct data
The mySugr Bolus Calculator depends on the accuracy of information entered. It
will not work correctly if you enter an inaccurate blood glucose value or
carbohydrate count or mistype a therapy factor. You are always responsible for
verifying the recommended insulin dose and using your best judgment based on
personal experience.
3.3 The mySugr Bolus Calculator cannot assess specific circumstances
The mySugr Bolus Calculator cannot assess, nor compensate for circumstances
such as the influence of stress, illness, or activity on your daily therapy.
These individual circumstances may an ect the required insulin dose and need
to be monitored and adjusted as necessary for your individual therapy.
3.4 Recommended updates
To ensure the safe and optimized running of the mySugr Bolus Calculator, it is
recommended that you install software updates as soon as they are available.
3.5 Smartphone security and maintenance
To enhance security when using the mySugr Bolus Calculator and to ensure that
only you have access to it, it is required you have an authentication method
(unlock mechanism) installed on your smartphone for the initial setup of the
mySugr Bolus Calculator and to update settings. You are advised to choose a
strong password or other strong authentication method and to not share your
password with unauthorized parties.
You are advised to only allow trusted applications to have permission to
system services.
To ensure the correct usability of the mySugr Bolus Calculator, you are
advised to not use the application on a smartphone with a cracked or damaged
screen.
To ensure integrity and security, the Bolus Calculator must not be used on
smartphones that are rooted or smartphones that have a Jailbreak installed.
3.6 The mySugr Bolus Calculator is for personal use only
Setup and usage of the mySugr Bolus Calculator is for your personal use only.
Do not share the mySugr Bolus Calculator with other persons with diabetes to
request bolus recommendations even if therapy conditions are similar as this
could lead to serious medical harm.
Installation
The mySugr Bolus Calculator is an extension of the mySugr Logbook. Just download the mySugr Logbook from the Apple App Store or the Google Play Store. For more detailed instructions on the installation and usage of the mySugr Logbook, please check out the mySugr Logbook User Manual.
Calculation
5.1 Activation
To get started, open a new entry screen in the mySugr Logbook by selecting the
‘+’ button (Figure 1). Import or manually input your blood sugar value and/or
carb value and select the “Calculate” button in the Bolus Calculator field
(Figure 2).
For each imported bolus, there is a new “Insulin (bolus)” entry with the date,
time, and the number of units delivered. The number of units is shown within a
tile as shown below.
Figure 1: Open a new entry screen
Figure 2: Select the “Calculate” button
In some locations, the first time you use the mySugr Bolus Calculator we will
ask you to unlock the Bolus Calculator by entering the activation code
provided by your healthcare professional (Figures 3 and 4). If you are not
asked for an activation code, you will be able to continue and set up your
mySugr Bolus Calculator.
Figure 3: Activation code on protocol sheet (depending on your location)
**Figure 4: Unlock your Bolus Calculator (depending on your location)
IMPORTANT:** You have the possibility to add/remove and move the fields of
your entry screen with the “Customize cells” button within the mySugr Logbook
(Figure 5). Tap the eye icon to show/hide cells (Figure 6). Please be aware
that this function can have an impact on what you see in the log entry screen.
If “Insulin (food)” and “Insulin (correction)” is hidden, the mySugr Bolus
Calculator will also be hidden. Note: “Insulin (food)” and “Insulin
(correction)” are grouped together and cannot be moved separately.
Figure 5: Customise cells
Figure 6: Show/hide cells
5.2 Set up
To use the mySugr Bolus Calculator you need to set up a passcode, touch or
face ID on your phone to make sure that only you can configure or change your
Bolus Calculator settings. Before being able to receive any bolus
recommendation, you will be asked a handful of questions about your
personalized settings.
5.2.1 Important definitions and default values
Active insulin: Insulin currently in the body that is working to lower
blood sugar. This amount does not include any insulin that is working to
account for carb intake. It also does not include basal insulin.
Target range: Acceptable upper and lower blood sugar levels when fasting
or before a meal (Default: 80130 mg/dL or 4.47.2 mmol/L).
Hypoglycemia: The setting below which the blood sugar level is considered
hypoglycemic (Default: 70 mg/dL or 3.9 mmol/L). In that situation, you will be
prompted with a recommendation to eat an appropriate amount of carbs.
Offset time: The expected amount of time before insulin begins to lower
blood sugar levels in the body (Default: 60 minutes).
Acting time: Total length of time the insulin is expected to be e
effective at lowering blood sugar (Default: 4 hours and 30 minutes).
Maximum bolus: The maximum amount of insulin to be delivered at one time.
This serves as a safety measure against unintended large boluses by asking
your for added confirmation (Default: 25 U).
Insulin increments: The amount in units (U), usually 0.1 U 0.5 U or 1 U,
by which your insulin dose is adjusted (Default: 1 U).
Meal rise: The maximum increase in your blood sugar level that is to be
tolerated after a meal without the need for an additional correction bolus
(Default: 75 mg/dL or 4.2 mmol/L).
IMPORTANT: These settings determine how your insulin dose is calculated,
and as you can imagine, it’s important to get them right. Please do not choose
your settings without consulting your doctor or healthcare professional. To
ensure that the mySugr Bolus Calculator settings fit your diabetes therapy,
you will be asked to review your settings every three months.
5.2.2 Time-dependent settings
Active insulin: Insulin currently in the body that is working to lower
blood sugar. This amount does not include any insulin that is working to
account for carb intake. It also does not include basal insulin.
To define your settings per time period:
- Select “time-dependent” (iOS, Figure 7a) or enable “time-dependent setting” (Android, Figure 7b) during the setup flow
- Select the time period and enter/edit the adequate value
- Repeat for each time period an elected as each time period ends when the next one begins
Figure 7a: Switch to time-dependent settings (iOS) Figure 7b: Switch to time-
dependent settings (Android)
IMPORTANT: Always consult with your healthcare professional about actions
you should take (if any) when using multiple time periods and traveling to a
different time zone. 5.3 Calculate
5.3.1 Receive bolus advice
To calculate an insulin bolus, please follow the steps below: 6
- Create a new log entry
- Enter your current blood sugar value and/or intended carb intake
- Select the “Calculate” button
- Confirm that you haven’t injected any insulin recently in order to receive the calculation result based on your settings and your log entries (more details in 5.5. Active insulin).
Figure 8: Enter your data
Figure 9: Select “Calculate”
Bolus advises without entering blood sugar value
It is possible to receive bolus advice without entering a current blood sugar
value. The recommended bolus amount will only reflect the insulin required for
the meal or carbs you enter.
Note: Using a blood sugar result will ensure the most accurate bolus
advice recommendation.
Bolus advises with hypo blood sugar result If your blood sugar is below your
set hypo limit, an insulin recommendation will not be provided. Instead, you
will receive a recommendation to eat a calculated amount of carbs in order to
raise your blood sugar into your target range. For accuracy, please record the
number of carbs you will actually consume in your log entry.
Negative correction insulin
When your blood sugar value is above your hypo limit and below the lower
boundary of your target range, the mySugr Bolus Calculator may calculate a
negative correction insulin. This negative value is accounted for in the meal
correction if you are planning to eat.
5.4 Confirm
It is possible that the recommendation doesn’t suit your therapy habits or the
way you currently feel. This is the reason why you are always able to dismiss
or accept a recommendation, keeping you in control of your therapy and
ensuring that your mySugr Logbook is as accurate as possible. Typically, the
calculation result is:
-
an insulin dose, when your blood sugar is too high–the result field is colored turquoise (Figures 10a and 10b)
-
a carb intake when a hypo (low blood sugar) is likely to occur without additional carbs. In this case – the result field is colored yellow (Figures 11a and 11b)
To confirm or dismiss your recommendation: -
Select the “Accept” button if you agree with the suggested result. The calculated values will automatically split into the “Insulin (Food)” and “Insulin (Corr.)” lines, based on the provided entries (blood sugar level and/or carbs). If you want to adjust the insulin amounts after selecting the “Accept” button, you can edit them manually (Figures 10b and 11b).
-
Select the “Dismiss” button if you feel that the recommendation doesn’t fit your current state or your therapy habits. This action will simply close the mySugr Bolus Calculator section so you can add your insulin values manually in the “Insulin (food)” and “Insulin (corr.)” lines.
Figure 10a: Insulin bolus recommendation
Figure 10b: Edit Insulin recommendation
**Figure 11a: Carbs recommendation Figure 11b: Edit Carb recommendation 8
IMPORTANT: The mySugr Bolus Calculator makes insulin dose suggestions
based on the information you enter. If the information you entered is
incorrect or incomplete, the resulting insulin dose suggestion will not be
accurate! Additionally, please consider that the calculation does not consider
influences like stress, activity, illness, or other factors which may an ect
your blood sugar.
5.5 Active insulin
The mySugr Bolus Calculator also continuously calculates your active insulin.
This is based on the last insulin doses you logged as correction insulin and
your personal settings for the duration of the insulin acting time.
Note: active insulin does not include any insulin that is working to
account for carb intake. It also does not include basal insulin.
The active insulin value will be shown with each calculation as part of the
calculation formula on the information screen. To read this information about
your (active) insulin and your previous injections while using the mySugr
Bolus Calculator, select the “i” button on iOS (Figure 12a and 12b) or
“details” on Android (Figure 12c and 12d). Figure 12a: Show bolus calculation
info during recommendation (iOS)
Figure 12b: Show bolus calculation info after accepting a recommendation (iOS)
Figure 12c: Show bolus calculation info during recommendation (Android)
Figure 12d: Show bolus calculation info after accepting a recommendation
(Android)
5.6 Save
Select “Save” to record your entry (Figure 13). By saving the log entry, the
confirmed insulin dose (food and correction) or carb suggestion will be saved
in the corresponding fields in the mySugr Logbook.
Note:** please note that correction and food boluses will be saved and
displayed separately in the mySugr Logbook. Your active insulin value is only
accessible during the bolus calculation and will not be saved and displayed in
the mySugr Logbook.
Figure 13a: Save entry (top navigation) Figure 13b: Save entry (button)
5.7 Additional parameter explanations
5.7.1 Advanced definitions
The following factors help to make sure that the mySugr Bolus Calculator does
not recommend a second bolus for a blood sugar event e.g. meal intake or a
high blood sugar level, that has already been covered by a previous insulin
bolus.
| Bolus | Meal **** | Bolus not required |
|---|
Current blood sugar value
Allowed blood sugar value: Meal rise
1: Hyperglycemia;
2: Target value;
3: Hypoglycemia;
4: Acting time;
5: O set time;
6: Meal rise
Diagram 1
Meal rise After a meal, blood sugar levels usually increase by a noticeable
amount, even in people without diabetes. Depending on the type of meal, your
blood sugar level can reach a maximum about an hour after your meal and return
to its original level after another one to two hours. This is a normal process
and so the mySugr Bolus Calculator takes this into account using “meal rise”.
The dotted line shows how your blood sugar level might change after a carb
bolus (Diagram 1). The mySugr Bolus Calculator tolerates an increased blood
sugar level within the “meal rise range” (green) without calculating an extra
correction bolus. When you enter a carb amount the “meal rise” setting is
added to the blood sugar target value. How long the meal rise lasts (the width
of the green area) is determined by the “o set time” and the “acting time”.
- The currently allowed blood sugar value considers the following factors:
- The upper limit of the “target range” for your current “time block”
- Blood sugar values that were tolerated as a “meal rise” and which have had a carb bolus that is still active (acting time)
- The expected reduction of your blood sugar level due to the e ect of insulin during the “acting time” (the decrease between the end of “o set time” and end of “acting time”)
- Excursions beyond the “target value” that have had a correction bolus that is still active (acting time)
| Bolus | Meal **** | Bolus not required |
|---|
Current blood sugar value
Allowed blood sugar value: Corrected blood sugar
1: Hyperglycemia;
2: Target value;
3: Hypoglycemia;
4: Acting time;
5: O set time;
6: Corrected blood sugar
Diagram 2
Acting time The acting time is the time for which the insulin delivered as a
bolus is still e ective. It is the whole time for which an increase in blood
sugar after a carb bolus or a correction bolus is taken into account. The
mySugr Bolus Calculator will not recommend a correction bolus for this time if
your current blood sugar level is less than the blood sugar level covered by
the previous bolus (meal rise or correct high blood sugar).
To choose the correct value, you should know the following information as per
discussions with your healthcare provider:
- The upper limit of the “target range” for your current “time block”
- Blood sugar values that were tolerated as a “meal rise” and which have had a carb bolus that is still active (acting time)
- The expected reduction of your blood sugar level due to the e ect of insulin during the “acting time” (the decrease between the end of “o set time” and end of “acting time”)
- Excursions beyond the “target value” that have had a correction bolus that is still active (acting time)
Offset time
The o set time is the time before the insulin begins to lower blood sugar
levels. After the o set time, your blood sugar level should decrease because
of the insulin, and at the end of the acting time, it should return to the
target level. The o set time must be at least 45 minutes, and the maximum
value will be limited by the acting time that you choose. You and your
healthcare provider should discuss what o set time is appropriate for you.
Correction bolus only
Correction bolus only The mySugr Bolus Calculator always compares your
blood sugar result with the currently allowed target range, and not just with
the target value for the current time block. Diagram 2 above shows an example:
The first correction bolus remains active during the acting time (the width of
the blue area). If a measured value falls within the currently allowed blood
sugar value (height of the blue area), no new correction bolus is calculated.
5.7.2 Mathematical basis for bolus calculations
Below is a list of the most important formulas and principles that the
mySugr Bolus Calculator uses to calculate your bolus.
Generally, a correction bolus is calculated only if your current blood sugar value is above the hypo blood sugar warning limit and outside of the target range. Additionally, it must be above the currently allowed blood sugar value. Only correction boluses greater than 0 will trigger an acting time.
- Currently allowed blood sugar value = The blood sugar value used in the calculation of a correction bolus, taking into account time block settings (target range mean value), currently active meals (meal rise), and currently acting correction boluses (active insulin).
** Blood sugar = The di erence between current blood sugar level and target blood sugar level.
Deactivation
The mySugr Bolus Calculator can be deactivated (or reactivated) within the mySugr Logbook settings. Go to “More/Profile & Settings/Insulin therapy” (iOS) or “Profile & Settings/Settings” (Android) and disable the mySugr Bolus Calculator using the “Use Bolus Calculator” switch button (Figure 14).
Figure 14: Disable Bolus Calculator
To uninstall the mySugr Logbook, please check out the mySugr Logbook User
Manual.
Data Security
Your data is safe with us–this is very important to us (we’re users of mySugr
too). The mySugr Bolus Calculator is a registered medical device (Medical
Device Regulation (EU) 2017/745) and carries the CE mark. As such, it is
required to meet the highest data security and reliability standards.
For more information, please refer to our privacy notice within our Terms and
Conditions.
Troubleshooting and support
8.1 Troubleshooting
We care about you. That’s why we have people with diabetes to take care of
your questions, worries, and concerns.
For quick troubleshooting, visit our FAQs page
8.2 Support
If you have questions about mySugr, need help with the mySugr Bolus Calculator
or the mySugr Logbook, or have noticed a mistake or problem, please contact us
immediately at support@mysugr.com.
You can also call us on:
+1 855-337-7847 (US toll-free)
+44 800-011-9897 (UK toll-free)
+43 720 884555 (Austria)
+49 511 874 26938 (Germany)
In the event of any serious incidents occurring in relation to the usage of
this medical device, please contact mySugr customer support and your local
competent authority.
Manufacturer
mySugr GmbH
Trattnerhof 1/5 OG
A-1010 Vienna, Austria
Telephone: +1 855-337-7847 (US toll-
free)
+44 800-011-9897 (UK toll-free)
+43 720 884555 (Austria)
+49 511 874 26938 (Germany)
E-Mail: support@mysugr.com
Managing Director: Joerg Hoelzing
Manufacturer Registration Number: FN 376086v
Jurisdiction: Commercial Court of Vienna, Austria
VAT Number: ATU67061939
2021-10-25
User Manual Version 3.0.16 (en)
10 Country information
Australian Sponsor: Roche Diabetes Care
Australia 2 Julius Avenue North Ryde NSW 2113