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Fluid administering and pressure sensing apparatus

  • US 4,300,572 A
  • Filed: 12/13/1979
  • Issued: 11/17/1981
  • Est. Priority Date: 12/13/1979
  • Status: Expired due to Term
First Claim
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1. A completely closed system for selectively measuring central venous pressure and effecting hyperalimentation of a patient through a single catheter inserted into a vein of the patient, said apparatus comprising:

  • a manometer having a vertical measuring tube defining an upper end portion and a lower end portion;

    a first selector valve connected to said upper end portion of the manometer tube;

    a hyperalimentation fluid supply;

    means for connecting said hyperalimentation fluid supply to said valve;

    a sterile air supply;

    means for connecting said sterile air supply to said valve, said valve being arranged to connect alternatively (a) said hyperalimentation fluid supply or (b) said sterile air supply to said upper end portion of the manometer tube;

    a second selector valve connected to said lower end portion of the manometer tube;

    a waste container;

    means for connecting said waste container to said second selector valve; and

    means for connecting said catheter to said second selector valve, said second selector valve being arranged to connect alternatively said lower end portion of the manometer tube to (a) the waste container or (b) said catheter.

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