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CHAPTER 9. MEASUREMENTS OF THE RESPIRATORY SYSTEM BIOMEDICAL ENGINEERING 2006200401 TAE_EUI, KIM

MEDICAL INSTRUMENTATION II. CHAPTER 9. MEASUREMENTS OF THE RESPIRATORY SYSTEM BIOMEDICAL ENGINEERING 2006200401 TAE_EUI, KIM. Respiratory Observation. PFT (Pulmonary Functional Tests) - Patient monitoring - . Architecture. Physiological Function. O2 Transport into blood stream

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CHAPTER 9. MEASUREMENTS OF THE RESPIRATORY SYSTEM BIOMEDICAL ENGINEERING 2006200401 TAE_EUI, KIM

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  1. MEDICAL INSTRUMENTATION II CHAPTER 9. MEASUREMENTS OF THE RESPIRATORY SYSTEM BIOMEDICAL ENGINEERING 2006200401 TAE_EUI, KIM

  2. Respiratory Observation PFT (Pulmonary Functional Tests) - Patient monitoring -

  3. Architecture

  4. Physiological Function • O2 Transport into blood stream • CO2 removal from blood stream • Homeostasis of PO2, PCO2

  5. Equivalent Model Respiration – Ventilatory mechanics => RC equivalent model - Gas transport => Mass balance equivalent ( Diffusion process )

  6. Pressure Measurement- Differential Pressure Transducer Diaphragm P1 P2 Diaphragm Strain gage

  7. Pressure Measurement- Balloon Sensor +5V Metal Switch Vi Hole Pressure Sensor Pressure Control Gas • A switch should not be stable state • Should be attached and detached • so that able to measure change of external Pressure P.

  8. Pressure Measurement- Balloon Sensor

  9. Pressure Measurement- N2 Washout Technique • - Patient at FRC • Prepare spirometer with O2, Vsp • Patient breath to the spirometer • Measure into concentration into the expirotory gas

  10. Gas Concentration Measurement Mass spectroscophy Gas chromatography Infrared spectroscophy Ramen spectroscophy Emission spectroscophy Paramagnetic O2 Analyzer

  11. Gas Transport Measurement- Gas distribution Test

  12. Gas Transport Measurement- Diffusion Test CO Diffusion Capacity The more FCO reduce compared to FHe, the more diffusion.

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