ApplicationNo. 741735 filed on 10/31/1996
US Classes:600/323, Oxygen saturation, e.g., oximeter600/344Mounting structure (e.g., belt, etc.)
ExaminersPrimary: Bahr, Jennifer
Assistant: Winakur, Eric F.
Attorney, Agent or Firm
Foreign Patent References
International ClassA61B 005/00
AbstractAn optoelectronic pulse oximetry sensor is described which physically conforms to a body portion of a patient, such as a finger, and provides a firm pressing engagement between the sensor and the patient's body portion. The sensor includes a flexible substrate, such as an elastic bandage-type material, which is physically conformable and attachable/adherable to the patient's body portion. The sensor also includes a light source assembly for transilluminating the patient's body portion, and a light detector assembly for measuring transmitted light. The dimensions of the light source and light detector assemblies are constructed to provide a high aspect ratio relative to the flexible substrate. When the sensor is conformably applied to the patient's body portion, localized pressure is exerted on the body portion at the points of contact with the light source and light detector assemblies, thereby stressing the skin and the underlying blood-perfused tissue. The stress imparted to the skin and underlying tissues affects the distributions of blood in the tissues and provides improved accuracy and sensitivity in arterial oxygen saturation measurement, especially in circumstances of low perfusion.
Field of SearchOximeters
Infrared, visible light, or ultraviolet radiation directed on or through body or constituent released therefrom
Determining blood constituent
Oxygen saturation, e.g., oximeter
Measured at specified areas of body portions
Mounting structure (e.g., belt, etc.)
Visible light radiation