PERITONEAL DIALYSIS APPARATUS

• US 3,730,183 A
• Filed: 07/01/1970
• Issued: 05/01/1973
• Est. Priority Date: 06/28/1969
• Status: Expired due to Term

• Current Assignee: Frank Kirk, Henry John Goldsmith
• Original Assignee: Frank Kirk, Henry John Goldsmith
• Inventors: Goldsmith, Henry John, Kirk, Frank
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US05/051,494
• Time in Patent Office: 1,035 Days
• Field of Search: 128/213,214R,227,230,348 210/321
• US Class Current: 604/29
• CPC Class Codes: A61M 1/1643 with weighing of fresh and used dialysis fluid
• CPC Class Codes: A61M 1/166 Heating for sterilisation A61M1/1686
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
• CPC Class Codes: A61M 1/282 Operational modes
• CPC Class Codes: A61M 1/742 by changing the size of a vent A61M1/7411 takes precedence
• CPC Class Codes: A61M 2205/6081 Colour codes

Abstract

The invention is concerned with apparatus for use in the treatment of acute and chronic renal failure by peritoneal dialysis and provides Dialysis apparatus comprising a bulk supply container for dialysate, a bulk waste container, an adjustable head gravity feed container provided with controlled heating means, a fluid flow line between said gravity feed container and said bulk supply and waste containers, a pump for pumping dialysate from the bulk supply container to the gravity feed container, means for determining the amount of dialysate pumped to the gravity feed container, a fluid flow line from the gravity feed container for association with a cannula placed in a patient, a fluid flow line for association with said cannula and leading to the bulk waste container, a vacuum pump and control means for reducing the pressure in the bulk waste container thereby to assist the outflow of dialysate from a patient to said container, weighing means for the bulk supply and bulk waste container, and an electro-magnetic control circuit which provides for the automatic control of the apparatus.

Claims

1. An automatic peritoneal dialysis apparatus comprising a bulk supply container for dialysate, a bulk waste container, an adjustable head gravity feed container, controlled heating means around said gravity feed container, said heating means having a temperature sensing means actuating said heating means a fluid flow supply line between said gravity feed container and said bulk supply container, a peristaltic pump for pumping dialysate from said bulk supply container to said gravity feed container, means for sensing and controlling the amount of dialysate pumped to said gravity feed container, a first fluid flow line from said gravity feed container for association with a cannula placed in a patient, a second fluid flow line for association with said cannula and leading to said bulk waste container, a vacuum pump and control means for reducing the pressure in said bulk waste container thereby to assist the outflow of dialysate from a patient to said container, automatic means for weighing said bulk supply and bulk waste containers, and electronic and electromagnetic control means for causing said gravity feed container to deliver a predetermined amount of dialysate to a patient, and said weighing means of said bulk supply and bulk waste containers to monitor the inflow and outflow of dialysate and warn of excessive fluid retention or depletion by a patient, an inflow valve in said first fluid flow line, an outflow valve in said second fluid flow line, a dwell period timer having contacts connected to said outflow valve, an outflow timer having contacts connected to said outflow valve, an electronic and electromagnetic control circuit having at least one gate for permitting inflow of dialysate to a patient via said inflow valve when the level and temperature of dialysate in the gravity feed container are correct, means for sensing when the inflow to the patient is complete and initiating closing of said inflow valve and operation of said dwell period timer for opening said outflow valve to permit outflow from the patient and initiating operation of said outflow timer for causing said outflow timer contacts to close said outflow valve at the end of the predetermined outflow time.

2. Dialysate apparatus, as claimed in claim 1, wherein said control means includes an adjustable timer arranged to switch off the apparatus after a predetermined time has elapsed in the event an exchange cycle is not completed.

3. Dialysis apparatus, as claimed in claim 2, wherein said control means incorporates means which operates to prevent flow of dialysate to a patient when its temperature is incorrect.

4. Dialysis apparatus, as claimed in claim 3, wherein said control means incorporates means which enables the volume of fluid inflow per cycle to a patient to be preset within a predetermined range, and means for effecting a predetermined number of exchange cycles.

5. Dialysis apparatus, as claimed in claim 4, wherein said control means incorporates timing means for automatically controlling said dwell and outflow periods of an exchange cycle.

6. Dialysis apparatus, as claimed in claim 5, wherein said control means incorporates a safety lock to prevent direct inflow of dialysate to a patient via the dialysate supply pump.

7. Dialysis apparatus, as claimed in claim 1, wherein said electronic and electro-magnetic control circuit includes an adjustable counter responsive to a predetermined number of cycles and interposed functionally between said contacts of said outflow timer to prevent initiation of a new cycle when said couNter has counted a preset number of cycles.