Quad-Rat Vitals Monitor - PowerPoint PPT Presentation

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Quad-Rat Vitals Monitor

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  1. Quad-Rat Vitals Monitor Advisor: Paul Thompson Client: Dr. Alex Converse

  2. Overview • PET Imaging • Requirements • Existing Devices • Previous Semester’s Work • Pulse Oximeter Probe Design Options • LabVIEW Interface Design Options • Where do we go from here? • Acknowledgments

  3. PET Imaging of Rats • Positron emission tomography (PET) scans to monitor location of tracers in rats • Client scans four anesthetized rats at a time • Needs to monitor the rats’ vitals http://homepages.cae.wisc.edu/~bme300/rat_monitor _s09/reports/FinalPaperSpring09.pdf

  4. Requirements: Quads Vitals Monitor • Client needs to simultaneously monitor four rats • SpO2levels, accuracy of ±2% • Heart rates up to 500 beats per minute • Respiratory rates of 20 to 30 breaths per minute • Rectal temperatures of 93 - 100° F • Non-invasive probes and user-friendly interface

  5. Existing Devices • Existing devices: • Client currently uses rudimentary devices to monitor vitals • Available: Pulse oximeter for mice and rats • Over $7000, one rat at a time http://www.starrlifesciences.com/mri.html

  6. Previous Semester’s Work • Developed circuit for detecting breathing rate using force sensing resistor • Designed and calibrated thermistor to detect temperature • Designed Graphical User Interface (GUI) in LabVIEW displaying breathing rate and temperature • Attempted to reverse engineer existing Pulse Oximeter Force sensing resistor LabVIEW interface

  7. General Probe Requirements • Applicable for rats of varying size • Reusable • Sufficient blocking of ambient light • Compatible LED and Photodiode http://www.oximetry.org/pulseox/principles.htm

  8. Foot Clip • Pros: • Similar to current device • Easy to reposition • Positioned far from the head • Cons: • Can displace easily • Risk of LED/Photodiode misalignment • Potential to apply excessive pressure

  9. Foot Wrap • Pros: • No displacement once attached • Alignment of LED/Photodiode maintained throughout testing • Cons: • Not adjustable • More involved cleaning process

  10. Tail Clip • Pros: • Easy to attach • No confusion over placement location • Adjustable • Cons: • May interfere with catheter in tail • Potential to apply excessive pressure

  11. Four Corners with Buttons Full display

  12. Four Corners with Buttons • Pros: • Logical layout • Important information visible • Cons: • Extra clicking • History graphs incomparable • Less robust A sample quarter of the final display

  13. Tab Interface • Pros: • Uncluttered interface • Easy to program • Cons: • Inefficient • Data hard to compare Full display

  14. Four Corners with Histories Full display

  15. Four Corners with Histories • Pros: • All data on one screen • Easy to compare trends • Cons: • Cluttered interface • Tiny on small screen A sample quarter of the final display

  16. Where do we go from here? • Finish LabVIEW GUI • Determine how data will be collected from Pulse Oximeter • Design pulse-ox probe to fit rat’s hind paw • Integrate with signal received from Graduate Students’ circuit • Print circuit boards • Fabricate housing apparatus

  17. Acknowledgements • Professor Paul Thompson • Dr. Alex Converse • Amit Nimunkar • Tim Balgemann • Liz Ahlers • Nate Werbeckes

  18. Questions?