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Vascular interface

  • US 4,258,717 A
  • Filed: 09/06/1977
  • Issued: 03/31/1981
  • Est. Priority Date: 09/06/1977
  • Status: Expired due to Term
First Claim
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1. A vascular interface apparatus, for connection to a patient comprising:

  • an arterial station including an arterial station valve with first, second, and third ports and an arterial catheter coupled to said first port for connection to an artery of the patient;

    a venous station including a venous catheter for connection to a vein of the patient;

    a sample station which includes a sample valve having first, second, and third ports and a valve member movable to connect said first port to said second or third ports, and a syringe receiver means at said third port for receiving a syringe means that can hold a blood sample;

    a first conduit coupling said second port of said arterial station valve to said first port of said sample valve;

    a second conduit coupling said second port of said sample valve to said venous station;

    means for operating said sample valve to interconnect said first and second sample valve ports to cause blood flow from an artery to a vein past said sample station, and to interconnect said first and third sample valve ports to enable the filling of a syringe means with a blood sample;

    a flushing source which includes a container of saline solution coupled to said third port of said arterialflushing means for operating said arterial station valve to connect said third port to said first port to flush said arterial catheter by passing saline solution through the first and second conduits and through the venous catheter to the patient;

    an arterial transducer coupled to said arterial station to measure the arterial blood pressure;

    a venous transducer coupled to said venous station to measure the venous blood pressure; and

    means operable to apply a controlled pressure to said arterial and venous stations and to the transducers coupled thereto while blocking the application of blood pressure to said transducers, whereby to enable simultaneous calibration of the transducers to the same pressure while maintaining the sterility of the system.

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