US 5,141,492 AGranted

Method and apparatus for performing peritoneal dialysis

OwnerJoseph E. Dadson, Mahesh Agarwalinventors

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Abstract

An apparatus for carrying out peritoneal dialysis includes a central manifold, a receptacle for waste dialysate, means for supporting and heating a plurality of fresh dialysate bags, a first conduit connecting the manifold with the patient catheter, a second conduit for connecting the manifold with the receptacle, and a plurality of additional conduits connecting the manifold individually with a plurality of fresh dialysate bags. The individual conduits can be selectively closed by clamping means controlled by an electronic control, and the latter has an automatic mode which cycles the apparatus through (a) a fill/dwell phase in which the contents of one of the fresh dialysate bags flows into the patient's peritoneum cavity by gravity and remains there, and (b) a drain phase which allows waste dialysate in the patient's peritoneum cavity to drain by gravity into the receptacle. The steps (a) and (b) are repeated for all of the bags until they have been used up. A safety provision is provided to determine whether a sufficient quantity of dialysate has drained from the patient's cavity during the drain phase. If not, the apparatus is shut down.

Claims10

Dependent claims

A method for carrying out peritoneal dialysis on a patient whose peritoneum cavity communicates with a patient catheter, the method comprising the steps:

a) providing an apparatus which includes
a manifold,
a receptacle for waste dialysate,
support means for supporting a plurality of fresh dialysate bags,
heating means for heating dialysate bags on said support means,
a first conduit for connecting the manifold with the patient catheter,
a second conduit for connecting said manifold with said receptacle,
at least two further conduits for connecting the manifold individually with a plurality of fresh dialysate bags, and
clamping means for selectively closing said conduits;
b) using electronic control means for controlling said clamping means in an automatic mode in which the control means causes the apparatus to cycle through the following phases:
1) a fill/dwell phase in which, for a first predetermined time, the first conduit and one of said at least two further conduits are both open while the remaining conduits are closed, whereby dialysate enters the patient's peritoneum cavity by gravity and remains there, so long as the vertical level of the dialysate bags is above that of the patient, and
2) a drain phase in which, for a second predetermined time, the first and second conduits are both open while the remaining conduits are closed, whereby waste dialysate drains by gravity from the patient's peritoneum cavity to said receptacle, so long as the vertical level of the patient is above that of the receptacle,
c) determining whether a sufficient quantity of dialysate has drained from the patient's cavity during the drain phase, and passing such information to said electronic control means, the electronic control means being such as not to advance to the next fill/dwell phase if an insufficient quantity of dialysate has drained, and
d) repeating said steps 1) and 2) for another fresh dialysate bag, and so on until all such bags have been used.

11 more elements

An apparatus for carrying out peritoneal dialysis on a patient whose peritoneum cavity communicates with a patient catheter, the apparatus comprising:

(1) a manifold,
(2) a receptacle for waste dialysate,
(3) a plurality of fresh dialysate bags,
(4) support means supporting said plurality of fresh dialysate bags,
(5) heating means for heating said dialysate bags on said support means,
(6) a first conduit for connecting the manifold with the patient catheter,
(7) a second conduit for connecting said manifold with said receptacle,
(8) at least two further conduits connecting the manifold individually with each of said fresh dialysate bags,
(9) clamping means for selectively closing at least said second and said further conduits, and
(10) electronic control means for controlling said clamping means, the electronic control means having an automatic mode in which the control means causes the apparatus to cycle through the following phases:
a) a fill/dwell phase in which, for a first predetermined time, the first conduit and one of said at least two further conduits are both open while the remaining conduits are closed, thus allowing dialysate to enter the patient's peritoneum cavity by gravity and remain there, so long as the vertical level of the dialysate bags is above that of the patient, and
b) a drain phase in which, for a second predetermined time, the first and second conduits are both open while the remaining conduits are closed, thus allowing waste dialysate to drain by gravity from the patient's peritoneum cavity to said receptacle, so long as the vertical level of the patient is above that of the receptacle,
said steps a) and b) repeating for another fresh dialysate bag, and so on until all such bags have been used;
(11) safety means for determining whether a sufficient quantity of dialysate has drained from the patient's peritoneum cavity during the drain phase, and for passing such information to said electronic control means, said electronic control means being such as not to advance to the next fill/dwell phase if an insufficient quantity of dialysate has drained, and
(12) selection means allowing a user to select the first and second predetermined times.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/707,025Filed 29 May 1991
Granted: 25 Aug 1992
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A61M 1/28
Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for…:…
A61M 1/1643
Constructional aspects thereof: with weighing of fresh and used dialysis fluid
A61M 1/282
Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation: operational modes
A61M 2205/3393
Masses, volumes, levels of fluids in reservoirs, flow rates: by weighing the reservoir