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Home > Research Days Archive > GW Research Days > 2019 > SMHS > 141

School of Medicine and Health Sciences Poster Presentations

Abstract

Introduction: In 2010, despite education and awareness, 112 million individuals self-reported driving their vehicle while impaired, and 1.2 million individuals were arrested for driving under the influence of alcohol or narcotics. It was reported in 2012 that 10,322 deaths were related to alcohol-impaired driving crashes, and the annual cost related to alcohol related incidents totals close to $59 billion. Although commercial alcohol sensors are available, they typically measure breath, therefore lacking continuous monitoring capabilities and requiring user operations. To address this challenge, there is a growing interest in developing non-invasive wearable sensors, capable of monitoring blood alcohol content (BAC) continuously in real-time. Such devices could be a valuable tool for research, consumer protection, and clinical use in the Emergency Room to monitor patients presenting with alcohol intoxication in a cost-effective manner. Materials and Methods: Transdermal alcohol monitoring is one of the methods to achieve this goal. It measures the transdermal alcohol content (TAC), alcohol vapors released from the skin, and estimates the BAC based on sensor readings. This technology has been adopted in the criminal justice system, especially in cases of alcohol abuse. However, existing monitors are expensive, bulky, inaccessible to typical consumers, and not available for use in a hospital setting. We designed and prototyped a wearable transdermal alcohol sensor based on modern low-power electronics and state-of-the-art ethanol fuel cell technologies. The fabricated prototypes can be worn like a watch or anklet. A small electrical signal proportional to the alcohol concentration is generated and recorded by the sensor system in real-time. The data can be recorded to a cloud database via Bluetooth Low Energy communication through a gateway device. The results are compared against BAC values measured by the standard available breathalyzer in the Emergency Room. Results and Discussion: Testing on known solutions of alcohol has shown a linear response of the sensor, and testing on healthy subjects time after consumption of an alcoholic beverage has shown a TAC response curve over that is similar to that of the BAC response curve from a commercially available breathalyzer. After initial testing in the Emergency Room, design modifications were made to improve the sensor enclosure to eliminate significant fluctuations in sensor readings. Testing is required on more healthy subjects before further testing on patients presenting to the Emergency Room with alcohol intoxication. Future improvements to the sensor include two humidity sensors to calibrate for sweat evaporation rate and a thinner enclosure.

Open Access

Slot Tool Present Sensor Lacking Light

1

Slot Tool Present Sensor Lacking Key

Skin Alcohol Sensor in the ER

Introduction: In 2010, despite education and awareness, 112 million individuals self-reported driving their vehicle while impaired, and 1.2 million individuals were arrested for driving under the influence of alcohol or narcotics. It was reported in 2012 that 10,322 deaths were related to alcohol-impaired driving crashes, and the annual cost related to alcohol related incidents totals close to $59 billion. Although commercial alcohol sensors are available, they typically measure breath, therefore lacking continuous monitoring capabilities and requiring user operations. To address this challenge, there is a growing interest in developing non-invasive wearable sensors, capable of monitoring blood alcohol content (BAC) continuously in real-time. Such devices could be a valuable tool for research, consumer protection, and clinical use in the Emergency Room to monitor patients presenting with alcohol intoxication in a cost-effective manner. Materials and Methods: Transdermal alcohol monitoring is one of the methods to achieve this goal. It measures the transdermal alcohol content (TAC), alcohol vapors released from the skin, and estimates the BAC based on sensor readings. This technology has been adopted in the criminal justice system, especially in cases of alcohol abuse. However, existing monitors are expensive, bulky, inaccessible to typical consumers, and not available for use in a hospital setting. We designed and prototyped a wearable transdermal alcohol sensor based on modern low-power electronics and state-of-the-art ethanol fuel cell technologies. The fabricated prototypes can be worn like a watch or anklet. A small electrical signal proportional to the alcohol concentration is generated and recorded by the sensor system in real-time. The data can be recorded to a cloud database via Bluetooth Low Energy communication through a gateway device. The results are compared against BAC values measured by the standard available breathalyzer in the Emergency Room. Results and Discussion: Testing on known solutions of alcohol has shown a linear response of the sensor, and testing on healthy subjects time after consumption of an alcoholic beverage has shown a TAC response curve over that is similar to that of the BAC response curve from a commercially available breathalyzer. After initial testing in the Emergency Room, design modifications were made to improve the sensor enclosure to eliminate significant fluctuations in sensor readings. Testing is required on more healthy subjects before further testing on patients presenting to the Emergency Room with alcohol intoxication. Future improvements to the sensor include two humidity sensors to calibrate for sweat evaporation rate and a thinner enclosure.

SLOT SENSOR

SENSORS

MORE DETAILS
MOC7811 is a slotted Opto isolator module, with an IR transmitter & a photodiode mounted on it. Performs Non-Contact Object Sensing. This is normally used as positional sensor switch (limit switch) or as Position Encoder sensors used to find position of the wheel. It consists of IR LED and Photodiode mounted facing each other enclosed in plastic body.
Specifications
Size: Refer to the image below
Mounting hole diameter: 3mm
Mounting hole spacing: 19mm
Slot width: 3mm
Slot depth: 7mm
Applications
DC motor position / velocity control
Position and velocity servomechanisms
Factory automation robots
Numerically controlled machinery
Computer printers and plotters
Details
When light emited by the IR LED is blocked because of alternating slots of the encoder disc logic level of the photo diode changes. This change in the logic level can be sensed by the microcontroller or by discrete hardware. This sensor is used to give position feedback to the robot or as Limit switches.

Slot Tool Present Sensor Lacking System

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