AFFORDABLE INSULIN PUMP
Cherry Gregory, Young-Jun Jeon, Joshua Stubbs, and McKayla Whitehead
Project Advisor: Dr. Bruce Gale
University of Utah Department of Mechanical Engineering
Testing Resulting
Testing Resulting
Background
Background
`
Individuals with Type I diabetes need to maintain their blood sugar at
a consistent level to maintain a healthy lifestyle. One of the ways
they do that is with an insulin pump. However, most insulin pumps
on the market are expensive. Even with health insurance, it can cost
several hundreds of dollars to purchase an insulin pump. Our aim is
to reduce the cost of an insulin pump by developing an assembly kit
that can be customized by the user. The benefit is that any part that
breaks can easily be replaced, without the cost of replacing the
entire pump.
Degrees vs Units of Insulin
12
Units of Insulin
10
Objective
Objective
8
Theoretical
Experimental
6
4
2
Construct a model for less than $500
Deliver the insulin within a margin of error of 1 unit of
0
0
1
2
3
4
5
6
7
Angle Input (Degrees)
insulin
Design a intuitive user interface for controllability
Design a customizable system for user satisfaction
Test 1
Specifications
Specifications
Metric
Units
Safely and Accurately
Deliver Medical Fluid
Units
+ .5
+1
+ 0.87
Accuracy of Force Sensor
Grams
+2
+5
+ 2.54
Test 2
Theo
Angl
Angl
Angle Error
e
e
Casing Design and Components
Ideal
Value
Motor
Accuracy
Margin Actual
Test 3
Std
Avg.
.
Erro Angle Error Error Dev
r
20
60
100
21
60
99
5%
0%
1%
20
58
101
0%
3%
1%
21
59
99
5%
2%
1%
3%
2%
1%
0.47
0.82
0.94
140
180
140
177
0%
2%
141
178
1%
1%
140
178
0%
1%
0%
1%
0.47
0.47
1.4%
0.6
1
Avg.
Reflective Sensor Able to
Compute Error
Yes/No
Yes
-
Yes
Accuracy of Motor
Degree
+1
+5
+1
Length of Battery Life
Hours
24
>6
6.2
Design Creates a Feeling of
Control and Confidence
-
810
>6
8
Easy to Travel with and Non
Obtrusive to Everyday Life
mm^3
185,000
<230,0
00
226,302
Price of Assembly Kit
$
$400
<$550
Design Features
Design Features
Customizable parts and case
Programmable features
Replace parts if they break
Interactive and intuitive LCD screen and button control
Sensors for accuracy/error
Future Improvement
Future Improvement
Improve battery life
Make customized microcontroller
Use less battery life
Exactly what we need and nothing extra
Reduce size
Customizable silicone cover
Water proofing
Reduce damage if dropped
Interface Flow Chart
Interface Flow Chart
Time
$250
Bolus
Edit Time
Hours
Inject Bolus
Bolus
Amt
Basal Amt
Edit Basal
Minutes
Edit
Bolus
Increase
Hold up Btn
Increase
Decrease
Decrease
Conclusion
Conclusion
The Affordable Insulin Pump does safely and accurately deliver
insulin to the customer to control their blood sugar. The
Affordable Insulin Pump would only cost the customer $250,
meeting the specification for affordability. However, the casing
was too large and the battery dies too quickly. By customizing
the LCD screen and microcontroller, the size would be reduced
and would allow a smaller battery.
