Method for determining the intraperitoneal volume and device for peritoneal dialysis
First Claim
1. A method for determining an intraperitoneal volume during peritoneal dialysis, which comprising the steps of passing peritoneal solution from a peritoneal cavity in a first circuit adjacent a first side of a semipermeable membrane;
- passing dialyzing fluid in a second circuit adjacent a second side of the semipermeable membrane;
measuring the concentration of an endogenous substance that passes through a peritoneum into the peritoneal solution in the peritoneal cavity; and
determining the intraperitoneal volume from the variation in the concentration over time.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and device are provided for determining a intraperitoneal volume during peritoneal dialysis. The method and device can be used in conjunction with a dialysis machine wherein a first circuit peritoneal solution from a patient'"'"'s peritoneal cavity is carried past one side of a semipermeable membrane and dialyzing fluid in a second circuit is carried past the other side of the membrane. The concentration of an endogenous substance (which during peritoneal dialysis passes through the peritoneum into the peritoneal cavity) is measured during the treatment. The intraperitoneal volume is calculated from the measured variation in concentration of the endogenous substance in the peritoneal solution. Preferably, the endogenous substance is albumin. The concentration of the endogenous substance preferably is measured at two successive times. After the first measurement, a predetermined volume of fluid ΔV is withdrawn from or added to the first circuit.
-
Citations
10 Claims
-
1. A method for determining an intraperitoneal volume during peritoneal dialysis, which comprising the steps of
passing peritoneal solution from a peritoneal cavity in a first circuit adjacent a first side of a semipermeable membrane; -
passing dialyzing fluid in a second circuit adjacent a second side of the semipermeable membrane;
measuring the concentration of an endogenous substance that passes through a peritoneum into the peritoneal solution in the peritoneal cavity; and
determining the intraperitoneal volume from the variation in the concentration over time. - View Dependent Claims (2, 3, 4, 5)
-
-
6. An apparatus for peritoneal dialysis comprising:
-
a dialyzing fluid source;
a dialyzer, the dialyzer divided by a semipermeable membrane into a first compartment and a second compartment, where the first compartment is part of a first circuit for peritoneal solution and the second compartment is part of a second circuit for dialyzing fluid;
a balancer for withdrawing or delivering fluid in the first circuit;
a measuring unit configured to determine the concentration of an endogenous substance in the peritoneal solution, which during peritoneal dialysis passes through the peritoneum into the peritoneal cavity; and
a calculating and evaluation unit configured to determine the intraperitoneal volume from a variation in concentration of the endogenous substance. - View Dependent Claims (7, 8, 9, 10)
-
Specification