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Disposable transducer with digital processing and readout

  • US 5,711,302 A
  • Filed: 03/03/1994
  • Issued: 01/27/1998
  • Est. Priority Date: 03/03/1994
  • Status: Expired due to Term
First Claim
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1. A totally self-contained, disposable pressure monitoring apparatus for monitoring and displaying physiological pressures of a patient that are either essentially constant intracompartmental pressures or cyclic hemodynamic pressures, comprising:

  • housing means for defining a transducer chamber and comprising a pressure monitoring port means for providing communication of fluid pressures to the transducer chamber;

    transducer means, situated in said transducer chamber so as to be totally self-contained within said housing means and disposable therewith, for sensing said fluid pressures and for outputting an electrical signal proportional to said sensed fluid pressures, said transducer means being placed in fluid communication with said pressure monitoring port means;

    electronic circuit means, electrically connected to said transducer means and mounted within said housing means so as to be totally self-contained within said housing means and disposable therewith, for receiving said electrical signals and for electronically processing said signals, said electronic circuit means comprising digital processor means programmed so as to (1) automatically derive electronic data responsive to the electrical signal sensed by said transducer means so that the derived data will represent either the cyclic hemodynamic or essentially constant intracompartmental physiological pressures of the patient, and so as to (2) automatically alter the output of a digital display responsive to the electrical signal sensed by said transducer means so that depending on whether the electronic data represent the cyclic hemodynamic pressures or the essentially constant intracompartmental pressure of the patient;

    display means, electrically connected to said electronic circuit means and contained within said housing means so as to be totally self-contained within said housing means and disposable therewith, for providing a visual display of the physiological pressures of the patient, said display means responding to said electronic circuit means so as to automatically alter the output of the display so that, in the case of data representing the cyclic hemodynamic pressures, locations are provided on said display for displaying a mean pressure value, a pulse rate value, and systolic and diastolic values, and said display means responding to said electronic circuit means so as to automatically display, in the case of data representing an essentially constant intracompartmental pressure, only a constant pressure value displayed at each said location; and

    power means, mounted within said housing means so as to be totally self-contained within said housing means and disposable therewith, for supplying all operational electrical power to said transducer means, said electronic circuit means, and said display means.

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