BME100 f2015:Group12 1030amL3

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OUR TEAM

Name: Morgan Baerwaldt
Name: Daniel Gaytan-Jenkins
Name: Cory Kehoe
Name: Jaxon Lewandowski
Name: Pedro Lopes
Name: Brittany Metzler

LAB 3A WRITE-UP

Descriptive Statistics

Temperature:

Spree Mean (°F): 99.27

Gold Standard Mean (°F): 97.26


Spree Standard Deviation: 1.347

Gold Standard Standard Deviation: 1.170


Heart Rate:

Spree Mean (bpm): 88.31

Gold Standard Mean (bpm): 88.92


Spree Standard Deviation: 22.994

Gold Standard Standard Deviation: 23.232



Results

Temperature:

Pearson's R Coefficient: 0.16743

T-Test Result: 7.6*10^-82

Lab3tempdatagroup12.PNG


Heart Rate:

Pearson's R Coefficient: 0.823329

T-Test Result: 0.390218


Group12hrdata.PNG




Analysis

Temperature:

The Pearson's R coefficient of .16743 indicates that the two methods of measuring temperature had a small positive correlation. The Student's T-Test value of 7.6*10^-82 indicates that there is a statistically significant difference between the two sampling methods.


Heart Rate:

The Pearson's R coefficient of .823329 indicates that the two methods of measuring temperature had a large positive correlation. The Student's T-Test value of .390218 indicates that there is no statistically significant difference between the two sampling methods.




Summary/Discussion

Spree headband had a multitude of design flaws that limited its performance in regards to comfort, accessibility, and temperature tracking. For starters, the device itself was not aesthetically pleasing. The headband design itself was a flaw, and the overall design was too big and bulky. When worn for a prolonged period of time the subject experienced discomfort. This also left an unsatisfactory marking on the subject's forehead. In regards to accessibility, the companion app that accompanied the device was poorly designed, and connecting via Bluetooth was a hassle because each device had an identical, generalized name of "Spree." The temperature tracking was not quantitative, which led to imprecision. It did not display the actual temperature of the subject, but rather displayed the temperature in four shades of color.

Several simple modifications to the device's design are recommended. In regards to comfort one could simply change the location of the Spree from the forehead to the wrist. Having this device on the wrist rather than the forehead will allow greater comfort by slimming down the size of the device and making it more aesthetically pleasing. With the app and Bluetooth connected, a simple tweak to default name is all that is needed. To correct the issue of how temperature is recorded, the manufacturers should change from the color reading to a numerical value to allow a more specific reading of the subjects temperature.

LAB 3B WRITE-UP

HALO - "Always Watching Over You"

HALO logo

Target Population and Need

Target population: Our target population is Americans living with diabetes and those prone to heart attacks. In America, 29.1 million people have diabetes while 1 in four deaths annually are due to heart disease.

Needs: Specific needs of the population include: 24/7 heart rate/blood glucose monitoring, the ability to interact with phone and doctors, comfortableness, and a simple design.




Device Design

Image of the Halo Watch

Image of the Halo Watch

Image of the Halo Watch




Inferential Statistics

22 heart rate, temperature, and glucose measurements were taken from each of 16 test subjects with both the HALO sensor and a gold standard sensor.

Lab3binfertable.png


The very high Pearson's R coefficient values indicate that there is a very strong positive correlation between the HALO and Gold Standard measurements for each of the three items tested, while the high t-test values indicate that there is no statistically significant difference between the two test methods.



Graphs

Lab3bglucchart.png

Lab3btempchartreal.png

Lab3btempchart.png