Method for testing peritoneal function

• US 7,303,541 B2
• Filed: 07/08/2003
• Issued: 12/04/2007
• Est. Priority Date: 07/10/2002
• Status: Expired due to Fees

• Current Assignee: JMS Company Limited
• Original Assignee: JMS Company Limited
• Inventors: Hamada, Hiroyuki, Namoto, Shinji
• Primary Examiner(s): Weber; Jon
• Assistant Examiner(s): MARTIN, PAUL C
• Application Number:
  US10/520,330
• Publication Number:
  US 20050244909A1
• Time in Patent Office: 1,610 Days
• Field of Search: None
• US Class Current: 604/29
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
• CPC Class Codes: A61M 2205/70 with testing or calibration facilities

Abstract

The peritoneal function of a peritoneal dialysis patient is examined to evaluate the condition of the patient. An examining method comprises a step of alternately repeating introduction/drainage of a predetermined quantity of a peritoneal dialyzing fluid of an osmotic pressure and introduction/drainage of a predetermined quantity of another peritoneal dialyzing fluid of an osmotic pressure different from the former one, a step of examining the drain to determine the quantity of peritoneal dialyzing fluid staying in the abdominal cavity of the patient and the concentration of a solute of interest, a step of conducting a peritoneal equilibrium test, and a step of conducting a blood test to grasp the change of the state of the blood caused by the introduction and drainage. The blood test step is executed only once. The current states of the peritoneal dialysis capability and the water removal capability of the patient can be efficiently and accurately evaluated so as to carry out peritoneal dialysis most suitable for the condition of the patient.

Claims

1. A method for testing peritoneal function in order to evaluate the condition of a peritoneal dialysis patient, comprising the steps of:

alternately and repeatedly infusing and draining with a first peritoneal dialysis fluid having a first osmotic pressure and a second peritoneal dialysis fluid having an osmotic pressure lower than the first osmotic pressure;

analyzing the drain fluid in order to assess both the amount of the peritoneal dialysis fluid that is retained within the abdominal cavity of a patient, and the concentration of monitored solutes in the peritoneal dialysis fluid for each time of the fluid drain;

performing a peritoneal equilibrium test, by infusing a dialysis fluid, repeating for predetermined times and at predetermined time intervals draining the dialysis fluid, sampling some of the drained fluid, returning the drained fluid to the patient, and then draining the dialysis fluid; and

performing a blood test in order to assess concentrations of the monitored solutes;

wherein the fluid infusion and the fluid drain is performed at least three times for each of the dialysis fluids of the respective osmotic pressure, a dwell time from when the dialysis fluid is infused until when the dialysis fluid is drained being set to be different each time when using dialysis fluid having the same osmotic pressure,

the repetition of the fluid infusion and the fluid drain is performed in the order such that the dialysis fluid of the higher osmotic pressure is used for the first and the last times,

the step of performing the blood test is executed only once; and

the peritoneal equilibrium test is performed last of all the steps, and the blood test is performed immediately before the peritoneal equilibrium test, or is performed during the peritoneal equilibrium test.

2. The method for testing peritoneal function according to claim 1,

wherein the monitored solutes for assessing peritoneal function are total protein, albumin, glucose, creatinine, urea, sodium, and chlorine.

3. The method for testing peritoneal function according to claim 2,

wherein the albumin concentration of the drain fluid is extrapolated based on the total protein concentration of the drain fluid.