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
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
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
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)
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