ANTS Anesthesiology  Neuromuscular ANTS Anesthesiology  Neuromuscular

ANTS Anesthesiology Neuromuscular - PowerPoint Presentation

valerie . @valerie
Uploaded On 2024-07-04

ANTS Anesthesiology Neuromuscular - PPT Presentation

Monitoring System 25 Group Information Greg Angelotti EE Otto Cruz CpE Kristin Zaza Soriano CpE EE Sponsor Dr Thomas Looke AnesthesiologistEE Current Methodology ID: 1053298

voltage sensor current device sensor voltage device current output volts power control amp patient volt pulses semg prototype dev




Presentation Transcript

1. ANTSAnesthesiology Neuromuscular Monitoring System#25

2. Group InformationGreg Angelotti (EE)Otto Cruz (CpE)Kristin “Zaza” Soriano (CpE/EE)Sponsor: Dr. Thomas Looke (Anesthesiologist/EE)

3. Current MethodologyAdminister Neuromuscular Blocking Agents (NMBA)Blocks Acetylcholine (ACh)Trivial neuromuscular stimulatingSubjective muscle response monitoring (if any at all)Pen and paper record keeping

4. Current Methodology*Courtesy of nursingcrib.com

5. Current MethodologyStimulateMonitorLamentsUlnar NerveAdductor PollicisThumbPosterior Tibial NerveFlexor Hallucis BrevisFootFacial NerveCorrugator SupercilliEyebrow*Facial NerveOrbicularis OcculiEyelid** Research shows not as reliable as the first two sites

6. ObjectivesTo safely stimulate targeted sitesTo effectively obtain patient signalsTo accurately record patient feedbackTo create a more organized environment

7. RequirementsMust consist of safe modular subsystemsMust obtain objective quantitative muscular responsesMust produce individual patient feedback and loggingMust reduce operating room clutter

8. Overall Block Diagram

9. SpecificationsShocking DeviceUp Time6 HoursBattery3.7 Volt Lithium Ion Polymer 2000mAhInput Voltage3.7, 5, 10 voltsOutput Current0 – 100 mAOutput Voltage 250 VoltsOutput WaveformMonophase Square Wave Output SignalsTwitch: 1 pulse per secondDouble Burst: 2 60 ms pulses at 50 Hz separated by 0.75 secondsTrain of Four: Four pulses every 2 secondsTetanus: 100 or 50 Hz pulses per second

10. Shocking Device Schematic

11. Digital to Analog ConverterDAC 7800 SpecificationTwo 12 bit SPI controlled DAC. 5 Volt Supply with a 10 Volt ReferenceSPI Inputs CS, Din, and Clk.Control inputs UPD_A, UPD_B, Clr.Control Ouputs Out_A, Out_B.

12. Analog to Digital Converter24 input bits sent in three 8 bit pulses.VDAC = (V–) + 4.75V – (31.6kΩ) (ILIM)/5000, Current and voltage control formula.CLKUPDAUPDBCSCLRInput read inX1110register bits 23(LSB)-12(MSB) are loaded into DAC A, and input register bits 11(LSB) - 0(MSB) are loaded into DAC B.

13. OPA2336 Opamp5 Volt power supplyCMOS unity-gain to create a stable output.Low offset voltage 125 micro Voltes max. Low 20 micro Amps quiescent current.

14. OPA547 OpampSingle supply voltage range of 8 to 60 volts.Peak output current of 750 mA and 500 mA continuous.Current control signal ILIM of 0 to 150 micro Amps produces 0 to 750 mA output.Voltage Control from 0.8 to 25 Volts output


16. 5A200S DC-DC ConverterSupply voltage of 5 volts.Output voltage of 250 volts peak and 200 volts continuous.0.1 microfarad capacitor.Input voltage will be pulsed at selected waveform.

17. TPS61093 DC-DC ConverterSupply voltage of 1.6 to 6 Volts.Output voltage from 1.6 to 17 volts with a 1.1 Amp peak over current protection.Three outputs 3.7, 5 , 10 volts, enable pins turn converters on.R1 and R2 control output voltage.

18. Overall Block Diagram

19. SpecificationsSensor DeviceDimensions3 ¼” x 2” x 1” Battery3.7 V & 3 VUp Time20 HoursDown Time30 DaysData TransmissionBluetooth 4.0Wireless Range<50 metersData Resolution10 bitAction Potential Detection0 - 10 mVPressure Detection0 - 10 lbsFlex Sensor Angle0 - 90 degrees

20. Sensor Device

21. Surface EMGChoose targeted site Prepare the siteShaveSanitizePlace Ag/Cl reference electrodesDisc Electrodes [<10 mm]Ready to read patient action potentials0-6 mV [Typical]

22. sEMG Preconditioning

23. Prototype sEMG TestingDifferential AmplificationHand at restDifferential Amplification(High Impedance)

24. Prototype sEMG TestingFull-Wave RectificationSmoothed Rectification

25. Prototype sEMG TestingHigh Cut-Off and Final Gain Stage*Prototype Design Credit to Gundanium on instructables.com

26. Sensor Device

27. Tactile Pressure SensorSensorFSR 400A301ManufacturerSparkfun ElectronicsTekscanSensing Area0.300” & 0.750”0.375”Force Range0-10 lbs0-25 lbsResponse Time1-2 usec<5 usecPrice5.95 USD16.25 USDImage

28. Pressure Sensor ConditioningStandard Resistance from sensor (FSR):Appr. 1 MOhmVin comes from CR2032Appr. 3 VoltsThe more the surface is pressed, the less sensor resistanceVoltage DividerVout = (Vin)*(R2/Rsensor+R2)R2 = 270 Ohms

29. Sensor Device

30. Flexible Potentiometer SensorSensorFS7548SoftSpotManufacturerSpectra SymbolSpectra SymbolLength114 mm100 mmThickness.48 mm.51 mmResistance Range1 KOhm – 100 KOhm1 KOhm – 10 KOhmPrice14.95 USD12.95 USDImage

31. Bend Sensor ConditioningStandard Resistance from sensor (FSR):Appr. 10 KOhmVin comes from CR2032 Appr. 3 VoltsThe more the sensor bends the more the less impedanceVoltage DividerVout = (Vin)*(R2/Rsensor+R2)R2 = 270 Ohms

32. Overall Block Diagram

33. SpecificationsTablet DeviceDimensions10 ¾” x 6” x 9 ¼” Power Supply4 A, 5 V Data TransmissionBluetooth 4.0Wireless Range<50 metersScreen Resolution1024 x 600 pixels

34. Main Device

35. TouchscreenParameterSpecificationDiagonal Size10.1”Aspect Ratio16:9Resolution4096 x 4096Accuracy±1.5 %Transmissivity90 %Active Current6 mASleep Current94 µADigital Power Supply3.3 VDD

36. Touchscreen ControllerI2C Voltage-level ShifterPandaboard ES J6Expansion HeaderGNDSCLSDAVIO3.3 V Step-up3.3 V1.8 VSCLSDAGND

37. Main Device

38. TFT-LCDParameterSpecificationDiagonal Size10.1”Frame Rate60 HzResolution1024 x 600 pixelsMaximum Power Consumption2.6 WMaximum Backlight Power Consumption1.5 WThickness0.5 mmDigital Power Supply3.3 VDDIDD Current240 mA

39. LCD ControllerLED BacklightControl I/O30-pin LVDSConnectionLCD I/OPandaboard ESJ3/J4

40. Main Device

41. Pandboard ES Features Dual Core ARM Cortex A9 (1.2 GHz) Graphics support (ex: OpenGL)LCD expansion header1 GB low power DDR2 RAMSD card slotGeneral I2C expansion headers802.11 b/g/n (WiFi)Bluetooth 4.0Awesome support community!

42. Pandaboard ES

43. MCU & BluetoothPartCC2540BLE112Manufacturer Texas InstrumentsBluegigaDimensions6.5 x 6.5 x 1 mm-MCU80518051Memory128/256 Kb128/256 KbTransceiverBluetooth 4.0Bluetooth 4.0Receiver19.6 mA19.6 mATransmitter24.0 mA24.0 mAPower Consumption2 to 3.6 volts2 to 3.6 voltsCost (Dev. Kit)$289.75$350.00

44. Communication for BLEProject specificMedical ApplicationsEnergy EfficiencyProtocolGeneric Attribute Profile (GAP/GATT)Runs on top of Attribute ProtocolServer-Client SchemeCharacteristics hold values of readings

45. GATT_Character_UUIDsHandleUUIDPermissionDescription10xFFF1Read/WriteSensor Read Flag20xFFF2WriteStimulation Variable30xFFF3Read/WriteOther Sensor Value40xFFF4WriteCurrent Variable50xFFF5Read/WriteEMG Sensor Value

46. Tablet SoftwareUbuntu 12.10 armhfCustom KernelPythonBlueZ stackPyQtGraphPlot real time response

47. Monitoring Screen

48. Bill of Materials (Tablet)ItemCost10.1” TouchScreenFree10.1” TFT-LCD Display$41.89LVDS Cable$9.88LCD Controller Expansion$57.18Pandaboard ES$180.48Power adapter (dev)$16.992.45mm pitch male pin headers$6.46USB to RS-232 adapter (dev)$7.00HDMI to DVI cable (dev)$4.5616Gb SD card$20.00

49. Bill of Materials (Sensors)ItemCostsEMG ElectrodesFREEPressure Sensor$5.95Bend Sensor$12.95Rotary Potentiometer$1.75Low Noise Op Amp x 3$2.32Differential Amp$10.25CC2450 Developers Kit (2 Modules)$289.75PCB Cost (Expected)$66.00Misc (Resistors,Capacitors,Diodes,etc)Free

50. Bill of Materials (Total)DeviceTotal CostMain Device (Tablet)$344.44Sensor Device$388.97Shocking Device$70Running Total$804.41

51. Questions?