Physics of capnography



Physical Methods of Carbon dioxide Measurement

  1. Infra Red Spectrography
  2. Molecular Correlation Spectrography (Microstream technology)
  3. Mass Spectrography
  4. Raman Spectrography
  5. Photoacoustic Spectrography


Factors Affecting IR Spectrography

  1. Atmospheric Pressure
  2. Nitrous Oxide
  3. Oxygen
  4. Water Vapor
  5. Inhalational Agents
  6. Response Time


Chemical Method of Carbon dioxide Measurement

Types of Capnographs

  1. Main-stream Capnographs
  2. Side-stream Capnographs

Recent advances in technology

  1. Microstream technology for side-stream sensors
  2. Main-stream sensors