1 / 26

Gastroscope

Gastroscope. Advisor: Dr. Ata Akin Design Team: Casey Gavinski Kenneth Hoyt Ashish Patel Kalpesh Trivedi. Problem Background. Diabetes Mellitus Gastroparesis Techniques for Diagnosis Invasive Non-invasive. Invasive. Methods of Diagnosis. Nuclear Medicine Test

hao
Download Presentation

Gastroscope

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Gastroscope Advisor: Dr. Ata Akin Design Team: Casey Gavinski Kenneth Hoyt Ashish Patel Kalpesh Trivedi

  2. Problem Background • Diabetes Mellitus • Gastroparesis • Techniques for Diagnosis • Invasive • Non-invasive

  3. Invasive Methods of Diagnosis • Nuclear Medicine Test • Patient consumes small amount of radioactive material • Scanner monitors amount of radioactivity in stomach • Upper Gastrointestinal (GI) Endoscopy Test • Camera inserted into digestive tract • Visually examines stomach • Intraluminal Manometry • Baloon inserted into stomach • Measures pressure generated by stomach contractions • Electrogastrography (EGG)

  4. Electrogastrography • Measurement of Gastric Myoelectrical Potential Signals • Electrodes placed on abdominal surface • Testing performed during states of Fasting and Postprandial • Correlation between EGG signals and gastric motility Non-Invasive !!

  5. EGG Signal • Gastric Myoelectrical Signals (500μV)

  6. EGG Signal • Primary Frequency Component 3 cpm (0.05 Hz)

  7. Existing EGG Systems • Signal Measurement Bandwidth • 1-18 cpm (0.02-0.3 Hz) • Primary Frequency • Stand Alone • Mobility Limited • Portable • No Graphical Display • Not Stand Alone

  8. Gastroscope • Portable • Stand Alone System • Graphical Display • Increased Bandwidth

  9. EGG Signal • Secondary Frequency Component 50 – 80 cpm (0.8 – 1.3 Hz)

  10. Why the 50 to 80 cpm ? • 3cpm range requires monitoring throughout fasting and postprandial states. (Differential Comparisons) • 50 to 80 cpm range provides consistent results with a short time reading. • 50 to 80 cpm range closely correlated to Intraluminal Manometry Test in dogs. (Diagnostic Charts Available) • Create look-up charts for faster more accurate diagnosis.

  11. Gastroscope System Architecture

  12. Analog Signal Processing • DC Amplifier • Instrumentation Amplifier • Gain > 10,000 • Low Noise • Filter • Low Pass • Flat Response • Sharp Roll-off

  13. Amplifier Schematic

  14. Printed Circuit Board (PCB)

  15. Amplifier Response • Amplifier and filter response to an input of 100 μv at 1 Hz

  16. Amplifier Response (Cont’d) • Amplifier and filter response to an input of 100 μv at 15 Hz

  17. Amplifier Response (Cont’d) • Amplifier and filter response to an input of 1 mv at 1 Hz

  18. Amplifier Response (Cont’d) • Amplifier and filter response to an input of 1 mv at 15 Hz

  19. DSP Flow Chart

  20. Matlab Simulation

  21. Matlab Simulation (Cont’d)

  22. Alternative System Design • Laptop Based Design • Near Real Time Data Analysis • LabVIEW Software • Data Storage in Spreadsheet Format • GUI Interface • Portable • Research Applications • IRB Approved

  23. Future Work • Integrated System • DSP Based Architecture • Properly Configured ADC • Touchscreen Display (LCD)

  24. Senior Design Expenditures

  25. 4 Year Financial Estimation Note: Production at $600 per unit is assumed as follows Year 1 – 20 units Year 2 – 30 units Year 3 – 40 units Year 4 – 50 units

  26. Summary of System Design Laptop Freq = Mag = Power = START STOP SUMMARY RESET National Instruments DAQ AI 16E Amplifier Fiter EGG SYSTEM

More Related