1 / 34

생체계측 II Report #9 2005200427 송성진

생체계측 II Report #9 2005200427 송성진. Chap 8. Part I. Flow and Volume of Blood. <Topics Covered in Chapter 8> Cardiac Output Fick Technique Method Indicator Dilution Thermodilution Electromagnetic Flowmeter (Not good) Ultrasound Flowmeters

dooley
Download Presentation

생체계측 II Report #9 2005200427 송성진

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. 생체계측 II Report #92005200427 송성진 Medical Instrumentation II

  2. Chap 8. Part I. Flow and Volume of Blood <Topics Covered in Chapter 8> • Cardiac Output Fick Technique Method Indicator Dilution Thermodilution • Electromagnetic Flowmeter (Not good) • Ultrasound Flowmeters • Plethysmography Medical Instrumentation II

  3. 1. Indicator Dilution Method • Fick Method • Indicator Dilution using rapid injection • Thermodilution Medical Instrumentation II

  4. (Infusion rate) -> We Known (Mass balance equation) Conclusion : Medical Instrumentation II

  5. Substitution of Equation! Fick Method (O₂ Consumption, L/min) measure By Spirometer (O₂ density of Artery Blood) (O₂ density of Vein Blood) Medical Instrumentation II

  6. Dye Dilution Method Indicator Dilution using rapid injection Indocyanine green (cardiogreen) Indictor dilution curve Recirculation Extrapolation Bolus injection Medical Instrumentation II

  7. Find Area! Conclusion : Medical Instrumentation II

  8. Weak Point : Once dye get an injection, it remains in our body. The dye should be excreted in the urine. In order to remeasure the blood flow, you should wait for a long time. Medical Instrumentation II

  9. Thermodiltion (standard) Using 4 lumen catheter (Swan-Ganz catheter) Bolus injection Weak Point : We unknown temperature of Right artium. Medical Instrumentation II

  10. Conclusion : (Heat content of injectate) (Blood density) (Specific heat of blood) Medical Instrumentation II

  11. 2. Ultra Sound -> pressure element, approvaled by 1MHz frequency. Ex) Primary Echo skin No reflection Medical Instrumentation II

  12. Far field Near field Medical Instrumentation II

  13. Transit Time Flowmeter Velocity of ultrasound. Velocity of RBC, WRC, and plate. Medical Instrumentation II

  14. i ) Down stream ( = Blood flow direction) ii ) Up stream ( = Blood flow reverse direction) Because… C >> ucosφ Conclusion : Medical Instrumentation II

  15. Continuous Doppler Flowmeter Doppler frequency shift Ex) aviation, ship, submarine… Medical Instrumentation II

  16. Pulsed Doppler Flowmeter Flow profile measurement Medical Instrumentation II

  17. Thermal Convection Flowmeter Thermister i ) Bias current -> Thermister heating ii ) T₂Thermister is cooled by thermal convection Weak Point : Invasive and Probe position is difficult. Medical Instrumentation II

  18. 3. Plethysmography -> Volume, blood flow measurement Howland Current Source ` V Cuf f Artery open Vein close Medical Instrumentation II

  19. Volume Normal Slope = flow Venous Thrombosis Arterial Cuff On Cuff Out Medical Instrumentation II

  20. Part II. Pulmonary Function Test Patient monitoring (Respiration monitoring) 1. Architecture Area Trachea Bronchus Alveoli Because… O₂ & CO₂ diffusion at alveoli Medical Instrumentation II

  21. 2. Physiological Functions • O₂ transport into blood stream • CO₂ removal from blood stream • Homeostasis of pH, Po₂, Pco₂ Medical Instrumentation II

  22. 3. Respiration • Ventilatory mechamis - RC equivalent circuit model • Gas transport - Mass balance equation(Diffusion process) Medical Instrumentation II

  23. 4. Pressure measurement Differential pressure transducer i ) Diaphragm ii ) Diaphragm Medical Instrumentation II

  24. iii ) Differential pressure sensor Mouth Mesh screen Flow Conclusion : Medical Instrumentation II

  25. Ballon Hole Ballon sensor Pressure sensor Gas Switch On -> Switch Off -> Metal switch MP Control Air pump Medical Instrumentation II Pressure

  26. 5. Flow measurement • Rotating Vane • Ultrasound Flowmeter • Thermal Convection Flowmeter • Pneumotachometer (standard) Medical Instrumentation II

  27. 6. Volume measurement -> Plethysmography IC VC TLC FRC TV (Tidal Volume) RV ERC Weak Point : It is Relative value, not absolute value. Medical Instrumentation II

  28. Rotating Paper Water Spirometer Air Water Pen Mouth CO₂ absorber Medical Instrumentation II

  29. Mouth Dry Spirometer Valve Air (gas) Inspiratory gas Expiratory gas Piston Gas is Separated by two section Medical Instrumentation II

  30. 7. FRC measurement He dilution technique - patient at FRC - prepare a spirometer of volume VSP and initialHe, concentration of fIHE - patient breaths tooth spirometer - find He concentration of expiration F Medical Instrumentation II

  31. N₂ washout technique - patient at FRC - prepare a spirometer of O₂, VSP - patient breaths to the spirometer - Measure N₂ concentration in (FFN₂) the expiratory. Medical Instrumentation II

  32. 8. Gas concentration measurement • Mass spetroscophy • Gas chromatography • Infrared spectrography • Raman spectrography • Emission spectrography • Paremagnetic O₂ analyzer Medical Instrumentation II

  33. 9. Gas transport measurement Gas distribution test (Single breath N₂ wachout) - RC -> TLC O₂ inspiration - Pause (hold breath) - Expiration and measure fN2 Medical Instrumentation II

  34. Diffusion test (CO diffusion capacity) - Inspire ω, He in air - fICO, fIHe - Hold breath for 10sec - Expire to measure FFCO, FFHe Medical Instrumentation II

More Related