Insulin Pump Simulator

8/10/2019 Insulin Pump Simulator

1/13

Prof. In-charge: Prof. Dr. rer. nat. Dipl. Phys.Matthias W

Fachhochschule Frankfurt am Main - University of applied

Insulin Pump Simula

Tho

Tho

Vive

Baskar Mohan


2/13

AGENDA

Introduction

Requirement Traceability

Design Model

Process Planning

Physiological Behaviour Simulation

Insulin dosage calculation

Safety Plan

Demo

Conclusion


3/13

Introduction

The insulin pump system is portable, automated system, which is used by the peop

diabetics, to maintain their blood sugar level by administering insulin automatically and gwarnings to the user when required. The Blood Glucose Level (hereafter mentioned

categorized into three main levels,

Unsafe level

A very low BGL (less than 70 dg/ml) is dangerous and can result in Hypoglycem

may cause diabetic coma and eventually death.

Safe level

Between 70 and 110 dg/ml, the BGL are safe and are comparable to those

diabetes. This is the ideal band.

Undesirable level

Above 110 dg/ml if insulin is undesirable but high levels are not dangerous i

Continuous high-levels however can result in long-term side effects


4/13

Requirement Traceability


5/13

Design Model

The design model used in our project is i terati ve modeland the different iterations u

Project are:

Power and insul in - display and in teraction

Power depletion with respect to time, insulin depletion with respect to dosage and

power and insulin level manually.

Sensor reading

Calculated the next BGL based on the simulation of the physiological behaviour o

body.

I nsuli n Calculation

If required, the insulin amount that has to be administered is calculated based on th

previous two readings.

Timer and Er ror simul ation

An independent timer and appropriate alerts, errors and warnings are simulated.

Auto-run and Manual mode

Mode control is simulated for controlling the auto and manual modes.


6/13

Process Planning (Unsafe and S

Based on the Sensor reading, determine the status of the BGL and follow the below pr

status,

Unsafe:

Do not inject any Insulin and warn the user of the status. Also a different beep so

unsafe level distinguishing it from undesirable level to warn the user of certain danger.

Safe:

In safe level, minimum and maximum threshold are introduced for better monitor

the BGL is below the minimum threshold, alert the user of the possibility of reaching un

BGL is above the maximum threshold, and if it continues to increase inject a minimum

the user of the possibility of reaching undesirable status. Else, no alerts or warning is req


7/13

Process Planning (Undesirable

Undesirable:

If the BGL is increasing, calculate and administer the insulin.

If the BGL is stable, administer a minimum dosage.

If BGL is decreasing, calculate the rate of change of BGL.

If it is increasing, do not inject insulin.

Else, administer a minimum dosage. In any case, display the appropriate warning message to the user.


8/13

Physiological Behaviour

The time dependent physiological behaviour of the human body is simulated based on the be

Where,

G(t) - Blood Glucose Level

K1 - Digestion Speed

Dose - Amount of insulin injected due to previous

t - Current time

t0 - Latest insulin injected time

A0 - Random factor simulating human behaviou

Reference:

- Estela, Carlos (2011) "Blood Glucose Levels," Undergraduate Journal of Mathematical ModelinVol.3: Iss. 2, Article 12.


9/13

Insulin Dosage Calculation

The insulin dosage amount is calculated only if the BGL is in undesirable level and

increase. In all other cases where the insulin has to be administered, only a minimum dosa

The insulin dosage calculation is done as follows,

Computed dosage = [Reading2 - Reading1] / 4

Where,

Reading1 - The previous BGL

Reading2 - The current BGL

If the calculated amount is less than the minimum single dose, then the minimum

injected. Similarly, if it is greater than the maximum single dose, the maximum single dose is in

maximum daily dose is considered while injecting the insulin.

Reference:

- Software engineering 9th edition. by Ian Sommerville.


10/13

Safety Plan

The safety of our insulin pump simulator is ensured by the implementation of the be

safety plans,1) The system shall not deliver a single dose of insulin that is greater than a specified maxim

system user.

2) The system shall not deliver a daily cumulative dose of insulin that is greater than a spec

for a system user.

3) The system shall include a hardware diagnostic facility.

4) The system shall include an exception handler for all of the exceptions that are identified

5) The audible alarm shall be sounded when any hardware or software anomaly is discover

diagnostic message as defined should be displayed.

6) In the event of an anomaly in the system, insulin delivery shall be suspended until the us

system and cleared the anomaly.


11/13

DEMO


12/13

Conclusion

Thus, the requirements of the insulin pump simulator has been successfu

designed, implemented and tested. We also tried to simulate the behaviour of a

glucose level.

Also, by the project we learned,

How to deal with a safety critical system.

To distinguish between safety and reliability.

To perform risk analysis and hazard analysis.

To successfully design and implement a Safety critical system.

The importance of correct documentation and continuous synchronisation of

To work in team and effective project management.

and many more...


13/13

Queries

Insulin Pump Simulator

Documents

Transcript of Insulin Pump Simulator