BME100 s2014:T Group12 L3

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OUR TEAM

Name: Casey Weigel
Name: Spencer Brown
Name: Kevin Haas
Name: Mariama Salifu
Name: Davis Matthews

LAB 3A WRITE-UP

Descriptive Statistics

Temperatures

Oral Thermometer (Gold Standard):
Test One (Lab Set 1)
Mean: 96.87333333°F
Standard Deviation: 1.905634131°F
Standard Error: 0.85221°F

Test Two (Outside)
Mean: 96.42241379°F
Standard Deviation: 1.696447472°F
Standard Error: 0.48972°F

Test Three (Lab Set 2)
Mean: 96.86533333°F
Standard Deviation: 1.653782996°F
Standard Error: 0.7396°F

RAIIN Sensor:
Test One (Lab Set 1)
Mean: 97.06666667°F
Standard Deviation: 1.277807807°F
Standard Error: 0.57145°F

Test Two (Outside)
Mean: 97.51436782°F
Standard Deviation: 1.36100541°F
Standard Error: 0.39289°F

Test Three (Lab Set 2)
Mean: 97.89866667°F
Standard Deviation: 0.742256118°F
Standard Error: 0.33195°F

Blood Pressure

Blood Pressure Cuff (Gold Standard):
Test One (Lab Set 1)
Mean: 119.0135135 mmHg
Standard Deviation: 15.20948987 mmHg
Standard Error: 6.8019 mmHg

Test Two (Post-Walk)
Mean: 120.0388889 mmHg
Standard Deviation: 19.34842649 mmHg
Standard Error: 5.5854 mmHg

Omron Watch Sensor:
Test One (Lab Set 1)
Mean: 113.9594595 mmHg
Standard Deviation: 15.07646191 mmHg
Standard Error: 6.7424 mmHg

Test Two (Post-Walk)
Mean: 113.4944444 mmHg
Standard Deviation: 13.52609612 mmHg
Standard Error: 3.9047 mmHg

Pulse Rate

Pulse Oximeter (Gold Standard):
Test One (Lab Set 1)
Mean: 84.15 bpm
Standard Deviation: 13.16109444 bpm
Standard Error: 5.8858 bpm

Test Two (Post-Walk)
Mean: 87.73333333 bpm
Standard Deviation: 17.84012104 bpm
Standard Error: 5.15 bpm

Omron Watch Sensor:
Test One (Lab Set 1)
Mean: 82.33333333 bpm
Standard Deviation: 10.13580107 bpm
Standard Error: 4.5329 bpm

Test Two (Post-Walk)
Mean: 85.5030303 bpm
Standard Deviation: 16.48229806 bpm
Standard Error: 4.758 bpm



Results

Comparisons of Devices

Temperature: Comparison of Oral Thermometer (Gold Standard) and RAIIN Sensor

Description of image
Lab set 1: p-value=1.62E-34
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Outside: Pearsons R-value=-0.129176204
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Lab set 2: p-value=6.76252E-31

Blood Pressure: Comparison of Blood Pressure Cuff (Gold Standard) and Omron Watch Sensor

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Lab set 1: p-value=8.40899E-14
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Post Walk: Pearsons R-value=0.41188949

Pulse Rate: Comparison of Pulse Oximeter (Gold Standard) and Omron Watch Sensor

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Lab set 1: p-value=5.48492E-31
Description of image
Post Walk: Pearsons R-value=0.766342874




Analysis

To get our results for this lab, we originally used an ANOVA test to get our p-values. Running this test was the equivalent, although more complicated, to a t-test. The p-values are very nearly the same from each test so both tests would give the same result, although the ANOVA requires more work. These tests were used to measure the effectiveness of newer products against the gold standard for the purpose of the device.

Temperature measurements

Based on the data the p values for the first inside temperature,second inside temperature and the outside temperature are 1.62E-34,6.76E-31 and 1.18E-71 respectively for the ANOVA tests which shows that there is significant difference between the oral thermometer measurements and sensor measurements since the p values are really small.There is a 99% chance that our results are right.

BP measurements

The P values for the lab measurements and post walk are 8.4E-14 and 2.7E-25 respectively which shows that there is a significant difference between the BP cuff measurement and the watch sensor measurements.

Pulse measurements

The p values for the lab measurements and post walk measurements are 5.5E-31 and 3.5E-79 respectively showing that there is a significant difference between the pulse oximeter measurements and the watch sensor measurements.





Summary/Discussion

Temperature

The pearson's R value for the temperature measurement is -0.129 and this shows that there is no correlation between the sensor measurements and the oral temperature measurements when the measurements are taken inside or outside the lab.

BP

The pearson's R value for Bp the measurement is 0.412 and this shows that the two devices have no correlation when measurements are taken in the lab or after walking outside for 15minutes.

Pulse

The pearson's R value for the pulse measurement is 0.766 which shows that there is a slight positive correlation between the watch sensor and the pulse oximeter when measurements are taken both inside the lab and outside the lab for 15minutes.

It can be concluded that since both devices yielded different results the sensor measurement is an inaccurate and unreliable way of measuring body temperature.


Design Flaws:
The sensor measurements were inaccurate because the sensor loses connection most of the times which resulted in a p value less than 0.05 and a Pearson's R value which is less than 0. The sensor must be secured to the body with a tape, a tape is not really strong enough to secure the sensor thermometer to the body which maybe another reason for the differences.

The sensor uses a Bluetooth to record temperature,and this makes it difficult to differentiate the temperature read out because other devices in the lab also use the Bluetooth too.

Recommendations:
The sensor thermometer is too big and can be made smaller to reduce cost and also take accurate measurements.It can also be in a form of wrist band which can be securely worn around the wrist or the arm.




LAB 3B WRITE-UP

Brain Activity Monitor: Back On Track--BAM BOT!

Bam bot logo100t12.jpg

Target Population and Need

Target Population:
People with mental illnesses, abnormal brain activity, for people that want to monitor brain activity and performance, and for people that need help staying on task (or awake) and want to improve their cognitive thinking.
Illnesses that this device helps include: Epilepsy, strokes, migraines, headaches,
The Need:
To help manage mental illnesses, abnormal brain activity, for help staying on task and for improve their cognitive thinking, and to monitor brain activity and performance,.


It warns of negative impacts from mental illnesses, to help people focus and think more intelligently, and records brain activity. It is able to be programmed to different settings including: warning mode, active thinking/study mode, and monitor only mode.



Device Design

Brain Activity Monitor Band--BAM Band!
Bam bot side view100t12.pngBam bot multi view100t12.pngBam bot multi angle100t12.png




Inferential Statistics

This is the T-test for the BAM-BOT compared to the gold standard.

T test: 8.66899E-76 Pearsons R: 0.999987005

The tests were run using the same person testing both devises. the test consisted of scripted reactions to stimulus of music, math problems, reading, and critical thinking. Changing the stimulus every 10 min to get the brain waves to react to the stimulus. Between the two devises there was no statistical difference to note. The BAM-BOT has the same level of accuracy as the gold standard.



Graph

Brainwave data 100t12jpeg.png


http://openwetware.org/images/7/7d/Data.png