BME100 s2014:W Group10 L3
Lab 3a: Device Validation
Summary: Temperature Sensor
The results for the body temperature was that the two devices have no correlation, with a t-test value of 2.713*10^-6. One major design flaw of the sensor is that it automatically shuts off after being stagnant for a certain amount of time. Anther reason the temperature sensor is inaccurate is because it takes an external temperature instead of an internal, like the oral thermometer. An improvement on this device would be if it was made like a hearing aid so it could be inserted in the ear to take an internal body temperature.
Results:
Oral Mean: 97.077 °F
Oral STD: ±1.075 °F
Oral Standard Error: ±0.063 °F
Sensor Mean: 96.495 °F
Sensor STD: ±2.028 °F
Sensor Standard Error: ±0.118 °F
Pearson's r: 0.206
Graph of Mean and Error Bars:
Summary: Blood Pressure
The results for the blood pressure was that the two devices have no correlation. When comparing the data from each device the t-test value is 7.905*10^-6. The main design flaw of the watch sensor is that in the wrist there is more interference than in the upper-arm. In the upper-arm the brachial artery is close to the surface with very little tissue-other than muscle-around it. In the wrist there are tendons, other veins, bone, and muscle, which interfere with obtaining an accurate blood pressure reading. An improvement would be to make the device larger so it could fit around the upper arm instead of having the cuff apparatus.
Results:
Cuff Mean: 118.425 mmHg
Cuff STD: ±17.985 mmHg
Cuff Standard Error: ±1.161 mmHg
Watch Mean: 112.304 mmHg
Watch STD: ±13.482 mmHg
Watch Standard Error: ±0.870 mmHg
Pearson's r: 0.153
Graph of Mean and Error Bars:
Summary: Pulse Sensor
From the data collected from both the watch sensor and pulse oximeter, it can be concluded that the watch sensor does not accurately measure heart rate. The t-test value between the two devices is 0.105. The main flaw of the watch is that it is not able to get a clear enough reading from the brachial artery in the wrist. An improvement would be to add more sensors to the device so it would be able to obtain a more accurate reading.
Results:
Pulse Ox Mean: 87.963 bpm
Pulse Ox STD: ±13.936 bpm
Pulse Ox Standard Error: ±0.900 bpm
Watch Mean: 86.742 bpm
Watch STD: ±16.154 bpm
Watch Standard Error: ±1.043 bpm
Pearson's r: 0.711
Graph of Mean and Error Bars:
Lab 3b: Device Development and Marketing
Target Population:
The target population of the device would be any person who suffers from type I or type II diabetes. People who suffer from diabetes are required to constantly monitor their blood glucose levels in order to stay healthy. These people are constantly looking for new ways to monitor their levels that take less time, are less painful, and more accurate.
Device:
The device will resemble a square band-aid in design and size. It will be a approximately 2in by 2in and less than 1/4in thick. There will be a small button on the top of the device to turn it on and activate the blue-tooth receiver. The measurements will be sent to a smartphone app via blue-tooth. Blood will be drawn through capillaries by microscopic needles on the underside of the device.
Data and Statistics:
Graph:
