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Procedure for the perfusion of cavities in objects and device for executing the procedure

  • US 4,998,914 A
  • Filed: 02/06/1989
  • Issued: 03/12/1991
  • Est. Priority Date: 02/17/1988
  • Status: Expired due to Fees
First Claim
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1. A method for the perfusion of body cavities with fluid supplied from a dispenser reservoir via a perfusion line and a medical instrument by a pump including a pressure sensor connected between the pump and the medical instrument and a control unit connected to the pressure sensor and connected to the pump, comprising the steps of:

  • determining the conductance of the fluid line between the pressure sensor and the medical instrument and determining the conductance of the medical instrument to provide the overall conductance G;

    connecting the medical instrument to the body cavity of a patient;

    initiating perfusion of fluid via the perfusion line and medical instrument;

    determining the pressure PGEM sensed by the pressure sensor;

    determining the volumetric rate of flow V;

    determining the actual fluid pressure in the body cavity PIST based on the pressure PGEM sensed, the volumetric rate of flow V and the overall conductance G; and

    attaining and maintaining the actual pressure PIST equal to a preset value of the volumetric rate of flow V through continuous adjustment of the volumetric rate of flow V based on the overall conductance G.

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