Resources Contact Us Home
Pulse oximeter probe-off detection system

Image Number 12 for United States Patent #6526300.

The present invention provides a number of improvements that can be incorporated into a pulse oximeter probe to detect when a probe has become dislodged from a patient and/or to prevent a probe-off condition. A probe-off condition occurs when the optical probe becomes partially or completely dislodged from the patient, but continues to detect an AC signal within the operating region of the pulse oximeter. In one aspect, the present invention provides electrical contacts that contact the skin of a patient when the probe is properly attached. In another aspect, the present invention provides a number of louvers placed in front of the sensor's photodetector to filter out oblique light rays that do not originate from a point in front of the detector. Accordingly, if the emitter and photodetector are not properly aligned, the photodetector will not produce a signal within the valid operating range of the pulse oximeter. In accordance with a method of the present invention the pulse oximeter can sound an alarm or display a warning if it determines that the probe is not properly attached to the patient.

  Recently Added Patents
Sensor controller, navigation device, and sensor control method
Electric power supply system and electric power supply system for motor vehicle
Semiconductor process
Triazine ring-containing polymer and film-forming composition comprising same
Method, base station and system for adjusting cell wireless configuration parameter
Hydrofluorocarbon refrigerant compositions for heat pump water heaters
High purity diphenyl sulfone, preparation and use thereof for the preparation of a poly(aryletherketone)
  Randomly Featured Patents
Ballistic armor with spall shield containing an outer layer of plasticized resin
Optical biosensor and method of use
Thermoplastic resin composition
Baitcast reel
Subsurface conductivity imaging systems and methods
Semiconductor device having contact hole and method of manufacturing the same
Shipping tray
Method and flow control device for delivering fuel oil to a low firing rate fuel oil burner
Linear conveyor system