Method for the detection of intracardiac electrical potential fields
Non-invasive cardiac device
Disposable apparatus for monitoring intrauterine pressure and fetal heart rate
Perinatal pulse oximetry sensor Patent #: 5109849
ApplicationNo. 775315 filed on 10/11/1991
US Classes:600/338, Fetal tissue600/376Fetal monitoring
ExaminersPrimary: Cohen, Lee S.
Assistant: Pontius, Kevin
Attorney, Agent or Firm
Foreign Patent References
International ClassA61B 005/00
AbstractA sensor placement and retention mechanism for use with fetal sensor sites beyond the user's reach are disclosed. The preferred embodiment of this invention is a fetal pulse oximetry sensor having an active face through which a light source and a light detector operate. The sensor includes a handle that facilitates placement of the active face at a sensor site in a preferred region beyond the transcervical region and beyond the reach of the user. A pair of electrodes--one disposed against the fetus' skin and one exposed to the amniotic fluid--are used to confirm that the sensor is firmly in place on the fetus. In an optional sensor retention feature, a self-inflating bladder presses the active face of the sensor against the fetus' skin to optically couple the sensor with the tissue at the sensor site.