Pressure Transducer Usage in Anesthesia Machines for Medical Gases in Medical, Health and Safety Applications

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Anesthesia Machines Applications for Pressure Transducers

Anesthesia Machines

Anesthesia machines are vital to the medical industry for their ability to accurately regulate and administer anesthetic and other medical gases. Careful regulation of medical gases like Nitrous Oxide (N2O) is important. Over dosage from Nitrous Oxide and an under dosage of medical oxygen can result in hypoxia and its associated symptoms. Regulation is performed through the use of careful pressure measurement. Todays automated systems often rely on pressure transducers to supply accurate, continuous information on the state of oxygen and nitrous oxide feed pressure. The following is a piping and instrumentation diagram of a basic anesthetic machine.

Anesthetic machines have safety features built in to ensure that no less than 21-25% of air flow to the patient is medical oxygen. Safety features, as well as all other monitoring systems rely on accurate, continuous monitoring of gas supply pressures by pressure transducers.

Pressure Transducer Application in Anesthesia Machines for Medical Gases Applications

Pressure Transducers are used in Anesthesia Machines for Medical, Health and Safety equipment in the following medical gas applications:

  • Oxygen Hospital Supply Line Pressure Monitoring
  • Oxygen Backup Supply Pressure Monitoring
  • Nitrous Oxide Hospital Supply Line Pressure Monitoring
  • Nitrous Oxide Backup Supply Pressure Monitoring
  • Low Oxygen Pressure Monitoring for Alarm Signaling
  • Output Gas Mixture Pressure to the Patient Monitoring

Medical Gases used in Anesthesia Machines for Medical, Health and Safety applications call for pressure transducer compatibility with medical gases at low pressure. Pressure transducers are responsible for monitoring the pressure of all oxygen, nitrous oxide and other gas inputs in anesthetic machines and for signaling low pressure alarms when gas supply pressure falls below necessary values. Components in use in anesthetic machines may require compatibility with 3A sanitary, non-incendive or explosive requirements based on application and gases used. The WIKA MG-1 and OT-1 electronic pressure transducers have been designed for accuracy, reliability, RFI resistance and quality in Medical, Health and Safety medical gas applications like Anesthesia Machines.

Pressure Transmitter Selection Considerations

  • Absolute or Gage Pressure Measurement
  • Class I Division I or Class I Division II Hazardous Area Requirements
  • Conduit or Non-Conduit Pressure Transmitter Protection
  • Intrinsically Safe, Explosion Proof, and Non-Incendive Pressure Transmitters
  • Media Compatibility for Pressure Transmitters
  • Pressure Transmitter Accuracy and Errors
  • Radio Frequency (RFI) and Electromagnetic Interference (EMI) in Pressure Transmitters
  • Cleanliness and labeling for oxygen service (ISO 150001, ASTM G 93)

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