Diapositiva 1 - UCF Department of EECS

Diapositiva 1 - UCF Department of EECS

ANTS Anesthesiology Neuromuscular Monitoring System #25 Group Information Greg Angelotti (EE) Otto Cruz (CpE) Kristin Zaza Soriano (CpE/EE) Sponsor: Dr. Thomas Looke (Anesthesiologist/EE) Current Methodology

Administer Neuromuscular Blocking Agents (NMBA) Blocks Acetylcholine (ACh) Trivial neuromuscular stimulating Subjective muscle response monitoring (if any at all) Pen and paper record keeping Current Methodology *Courtesy of nursingcrib.com

Current Methodology Stimulate Monitor Laments Ulnar Nerve Adductor Pollicis Thumb

Posterior Tibial Nerve Flexor Hallucis Brevis Foot Facial Nerve Corrugator Supercilli Eyebrow* Facial Nerve

Orbicularis Occuli Eyelid* * Research shows not as reliable as the first two sites Objectives

To safely stimulate targeted sites To effectively obtain patient signals To accurately record patient feedback To create a more organized environment Requirements Must consist of safe modular subsystems Must obtain objective quantitative muscular responses Must produce individual patient feedback and logging Must reduce operating room clutter

Overall Block Diagram Specifications Shocking Device Battery 3.7 Volt 2200 mAh Lithium Ion Polymer Up Time 6 Hours

Idle Time 3 Days Input Voltage 3.7 Volts Output Current Variable 0 to 70 mA Output Pulse

Square Wave Pulse 200us Duration Train of Four Single Set of 4 Pulses Per 2 Seconds Tetanus 100 Hz (100 Pulses Per Second) Twitch

1 Pulse Per Second Dimensions 30 x 40 x 10 mm Shocking Device MCU & Bluetooth Part CC2540

BLE112 Manufacturer Texas Instruments Bluegiga Dimensions 6.5 x 6.5 x 1 mm MCU

8051 8051 Memory 128/256 Kb 128/256 Kb Transceiver

Bluetooth 4.0 Bluetooth 4.0 Receiver 19.6 mA 19.6 mA Transmitter 24.0 mA

27.0 mA Power Consumption 2 to 3.6 volts 2 to 3.6 volts Cost (Dev. Kit) $289.75

$350.00 Shocking Device Shocking Device Current Control PWM to produce the 200us square wave form. 10 Bit Serial SPI Dual Output DAC to control current output. 2^10 taps (1024) with a 10 bit DAC Issues deciding between Digital

Potentiometer (voltage) and DAC (voltage & current). Current Op amp Current input varies between 0 to 150 uA. Current output 0 to 750 mA. Availability and price is the reason for this part. DC to DC Converter Optional part Input 3.1 to 75 volts Frequency Synchronization

Shocking Device Negative Feedback DC Converter to ADC port on MCU Digital Integral controller to regulate the stimulation current. Using the formula above will allow us to control the stimulators output. Shocking Device Power Supply Voltage buck/boost regulator dual output

3.7 volts supplies processor & 5 volts supplies DAC Boost Voltage regulator supplies op amp at 8 volts The power supply is a 3.7 volt 2200 mAh lithium ion polymer. Overall Block Diagram Specifications Sensor Device Dimensions

30 x 40 x 10 mm Battery 5V Up Time 6 Hours Idle Time 3 Days

Data Transmission Bluetooth 4.0 Wireless Range <50 meters Data Resolution 12 bit Action Potential Detection 0 - 10 mV Pressure Detection 0 - 10 lbs Flex Sensor Angle 0 - 90 degrees Sensor Device

Surface EMG Pick targeted sites Prepare the site Place Ag/Cl reference electrodes Ring Electrodes [preferred] Disc Electrodes [<10 mm] Ready to read patient action potentials 0-6 mV [Typical] sEMG Preconditioning Sensor Device Tactile Pressure Sensor Sensor FSR 400 A301 Manufacturer Sparkfun Electronics

Tekscan Sensing Area 0.3 0.375 Force Range 0-10 lbs 0-25 lbs

Response Time 1-2 usec <5 usec Price 5.95 USD 16.25 USD

Image Pressure Sensor Conditioning Standard Resistance from sensor (FSR): Inverting Amplifier Appr. 1 MOhm VREF should be negative Appr. -5 Volts

The smaller RG is the more sensitive the sensor becomes Vout = (Vref)*(RG/Sensor) Sensor Device Flexible Potentiometer Sensor Sensor FS7548

SoftSpot Manufacturer Spectra Symbol Spectra Symbol Length 114 mm

100 mm Thickness .48 mm .51 mm Resistance Range 1 KOhm 100 KOhm 1 KOhm 10 KOhm

Price 14.95 USD 12.95 USD Image Bend Sensor Conditioning Standard Resistance from sensor (FSR):

Inverting Amplifier Appr. 10 KOhm VREF should be negative Appr. -5 Volts The more the sensor bends the more the greater the impedance Vout = (Vref)*(RG/Sensor)

Sensor Device Power Distribution Overall Block Diagram Specifications Tablet Device Dimensions 10 x 6 x 2 Battery

4000 mAh, 5V Up Time 4 Hours Idle Time 8 Hours Data Transmission

Bluetooth 4.0 Wireless Range <50 meters Screen Resolution 1024 x 600 pixels Main Device Touchscreen Parameter Specification Diagonal Size 10.1 Aspect Ratio 16:9 Resolution

4096 x 4096 Accuracy 1.5 % Transmissivity 90 % Active Current

6 mA Sleep Current 94 A Digital Power Supply 3.3 VDD Touchscreen Controller Custom I2C Voltage-level Shifter

GND SCL SDA VIO Pandaboard ES J6 Expansion Header Main Device TFT-LCD

Parameter Specification Diagonal Size 10.1 Frame Rate 60 Hz Resolution

1024 x 600 pixels Maximum Power Consumption 2.6 W Maximum Backlight Power Consumption 1.5 W Thickness

0.5 mm Digital Power Supply 3.3 VDD IDD Current 240 mA LCD Controller LED Backlight Control I/O

30-pin LVDS Connection Pandaboard ES J3/J4 LCD I/O Main Device Pandboard ES Features Dual Core ARM Cortex A9 (1.2 GHz)

Graphics support (ex: OpenGL) LCD expansion header 1 GB low power DDR2 RAM SD card slot General I2C expansion headers 802.11 b/g/n (WiFi) Bluetooth 4.0 Awesome support community! Pandaboard ES Main Device

Tablet Power 6 volts 10000 mAh 23 x 99 x 71 mm $15-17 Tablet Software Ubuntu C++ qT Monitoring Screen Bill of Materials (Tablet)

Item Cost 10.1 TouchScreen Free 10.1 TFT-LCD Display $41.89 LVDS Cable

$9.88 LCD Controller Expansion $57.18 Pandaboard ES $180.48 Power adapter (dev) $16.99

2.45mm pitch male pin headers $6.46 USB to RS-232 adapter (dev) $7.00 HDMI to DVI cable (dev) $4.56

8Gb SD card Free Bill of Materials (Sensors) Item Cost sEMG Electrodes FREE

Pressure Sensor $5.95 Bend Sensor $12.95 Rotary Potentiometer $1.75 Low Noise Op Amp x 3

$2.32 Differential Amp $10.25 CC2450 Developers Kit (2 Modules) $289.75 PCB Cost (Expected)

$70.00 Misc (Resistors,Capacitors,Diodes,etc) Free Bill of Materials (Total) Device Total Cost Main Device (Tablet)

$324.44 Sensor Device $392.97 Shocking Device $70 Running Total $787.41

Progress Coming Soon? Finish prototyping

Finalize sensor PCB schematic for printing Program microcontrollers Sync Bluetooth devices Integrate tablet parts Software development Profit Questions?

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