Drain and fill logic for automated peritoneal dialysis
AssigneesBaxter Healthcare S.A., Baxter International Inc.
InventorsRobert W. Childers, Ying-Cheng Lo, Peter Hopping
Life of this patent
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Abstract
The present system and method in one embodiment limit a maximum instantaneous peritoneal volume to a comfortable level, while allowing the dialysis machine to advance to fill a prescribed volume whenever the drain ends after a minimum drain percentage has been attained. If a low drain condition occurs, the nominal fill volume is lowered and a therapy cycle is added, so that a prescribed total amount of fresh therapy fluid is used during therapy, maximizing therapeutic benefit. An allowable residual volume at the end of an incomplete drain is increased, thereby lowering the probability of a subsequent low drain condition.
Claims32
A system for performing a peritoneal dialysis therapy comprising:
- at least one dialysis fluid pump;
- and
- a control unit operable with the at least one dialysis fluid pump to perform a plurality of peritoneal dialysis cycles, the cycles including a fill phase, a dwell phase and a drain phase, the control unit configured to:
- (i) avoid a maximum peritoneal volume being exceeded after any of the dwell phases of the plurality of patient cycles,
- (ii) ensure that a total sum of dialysis fluid volume of the fill phases as prescribed is delivered to the patient, and
- (iii) if a residual volume left in the patient after one of the drain phases is determined to cause (i) to be violated during a next cycle, reduce an amount of dialysis fluid volume of the fill phase of the next cycle and add an extra cycle to the peritoneal dialysis therapy so that (ii) is satisfied.
A system for performing a peritoneal dialysis therapy comprising:
- at least one dialysis fluid pump;
- and
- a control unit operable with the at least one dialysis fluid pump to perform a plurality of peritoneal dialysis cycles, the cycles including a fill phase, a dwell phase and a drain phase, the control unit configured to:
- (i) ensure that a total sum of dialysis fluid volume of the fill phases as prescribed is delivered to the patient, and
- (ii) if a minimum drain percentage after one of the drain phases cannot be achieved, reduce an amount of dialysis fluid volume of the fill phase of the next cycle and add an additional cycle to the peritoneal dialysis therapy so that (i) is satisfied.
A system for performing peritoneal dialysis comprising:
- at least one dialysis fluid pump;
- and
- a control unit operable with the at least one dialysis fluid pump to perform a plurality of peritoneal dialysis cycles, the cycles including a fill phase, a dwell phase and a drain phase, the control unit configured to:
- (i) ensure that at the end of the dwell phase of each cycle, a maximum peritoneal volume is not exceeded,
- (ii) ensure that a total prescribed dialysis fluid volume over the fill phases of the cycles is delivered to the patient, and
- (iii) monitor each drain phase to ensure a minimum drain volume is met, and if not, shorten a subsequent fill phase to comply with (i) and add a cycle to comply with (ii).
A system for performing a peritoneal dialysis therapy comprising:
- at least one dialysis fluid pump;
- and
- a control unit operable with the at least one dialysis fluid pump to perform a plurality of peritoneal dialysis cycles, the cycles including a fill phase, a dwell phase and a drain phase, the control unit configured to:
- (i) store a previously entered continuous cycling peritoneal dialysis (“CCPD”) therapy having a total prescribed fresh dialysate fill volume delivered over n cycles, the cycles performed over a total therapy duration;
- and
- (ii) automatically convert the CCPD therapy into a tidal peritoneal dialysis therapy having n+1 cycles, using the total prescribed fresh dialysis fill volume, and maintaining the total therapy duration.
Dependencies are inferred from the claim text.