Method and apparatus for locating the QRS portion of an electrocardiographic signal
Heartbeat occurrence detector
Respiration monitor and x-ray triggering apparatus
Method and apparatus for detecting respiratory distress
Cardiac arrhythmia analysis system Patent #: 4446868
ApplicationNo. 06/660458 filed on 10/12/1984
US Classes:600/484, Detecting respiratory condition600/509, Detecting heartbeat electric signal600/519, Detecting signal repetition rate600/529, Respiratory600/536Detector responsive to movement induced variation in impedance of body to electric current
ExaminersPrimary: Howell, Kyle L.
Assistant: Hanley, John C.
Attorney, Agent or Firm
International ClassesA61B 5/08 (20060101)
A61B 5/024 (20060101)
A61B 5/0245 (20060101)
AbstractApparatus for monitoring respiration and heartbeat and for processing electrical signals representative thereof, including circuits for developing a phase-shifted and amplitude-offset respiration signal for comparison with an original respiration signal for compensating for signal drift, and circuits for logically combining signals representative of the presence of respiration and heartbeat for eliminating certain false indications which may occur when only heartbeat exists.