Tips for buying Oxygen Monitor

  1. Oxygen monitors should have 3% accuracy when exposed to the following potentially interfering components: carbon dioxide, halothane, condensing water vapor and water droplets.
  2. The intended use of the oxygen monitor determines the need for an alarm feature.
  3. Alarms may not be essential for oxygen analyzer units intended to perform only routine oxygen spot checks or equipment maintenance, while they are definitely required in operating room monitor units intended for patient monitoring.
  4. Whenever the audible alarm has been disabled, an alarm silence indicator should be provided. If the audible alarm can be disabled, it should be automatically reactivated within two minutes and should sound if the alarm condition persists.
  5. The oxygen monitor should indicate the oxygen level to within 3% oxygen. An oxygen monitor unit for continuous monitoring should have a low alarm that cannot be set below 18% oxygen.
  6. Audible alarms should be loud and noticeable especially since the units are often used in noisy areas. Intermittent or alternating tone alarms are preferred over steady tone alarms.
  7. Changes in oxygen concentration should be indicated very fast. The response time, including alarm delay, should be less than 20 seconds.
  8. Temperature and pressure effects should be minimal over normal breathing circuit conditions.
  9. A change in breathing circuit temperature or pressure will not require oxygen monitor recalibration. The changes should be predictable from the manufacturer's specifications.
  10. Operating room nits intended for spot checks or maintenance should operate for at least 12 hours on fully charged batteries. Those using rechargeable batteries may not need the same endurance.
  11. An automatic low-battery indicator should be included with battery-powered oxygen monitors, or the unit may include a manually activated battery test to allow assessment of battery condition.
  12. Low-battery indicator or battery test should not affect the medical oxygen monitor's operation and alarms. After the first indication of a low battery, the oxygen monitor should function normally for at least one hour.
  13. When a medical oxygen monitor with rechargeable batteries is operating from its charger, open-circuited batteries or short-circuited batteries should not affect it. Recharging the battery will take less than 16 hours.
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