User interface and monitoring functions for automated peritoneal dialysis systems
DC CAFCFirst Claim
1. An automated peritoneal dialysis system includingmeans for establishing flow communication with the patient'"'"'s peritoneal cavity catheter through a pumping mechanism,actuator means for operating the pumping mechanism to emulate gravity flow conditions independent of head height conditions and:
- (i) drain spent peritoneal dialysis liquid from the peritoneal cavity, and(ii) infuse fresh dialysis liquid from a source into the peritoneal cavity,control means for directing operation of the actuator means to conduct a peritoneal dialysis modality, andmeans for monitoring system operation includingmeans for generating a first alarm signal when system operation fails to satisfy a first predetermined set of criteria,means for generating a second alarm signal when system operation fails to satisfy a second predetermined set of criteria different than the first set of criteria,means for (i) suspending system operation in response to the first alarm signal; and
(ii) requiring user intervention to resume system operation, andmeans for (i) continuing system operation for a predetermined time period in response to the second alarm signal;
(ii) canceling the second alarm condition without user intervention when, after the predetermined time period, system operation satisfies the second set of criteria; and
(iii) initiating a first alarm condition when, after the predetermined time period, system operation fails to satisfy the second set of criteria.
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Abstract
Systems for performing peritoneal dialysis having an improved user interface functions and monitoring capabilities. In one respect, the systems discriminate between alarm conditions that require user intervention to correct and alarm conditions that reflect conditions that are anomalies but typically correct themselves with minimum or no user intervention. In another respect, the systems identify occluded liquid flow paths and discriminate whether the flow path is associated with a liquid source or a liquid destination.
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Citations
22 Claims
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1. An automated peritoneal dialysis system including
means for establishing flow communication with the patient'"'"'s peritoneal cavity catheter through a pumping mechanism, actuator means for operating the pumping mechanism to emulate gravity flow conditions independent of head height conditions and: -
(i) drain spent peritoneal dialysis liquid from the peritoneal cavity, and (ii) infuse fresh dialysis liquid from a source into the peritoneal cavity, control means for directing operation of the actuator means to conduct a peritoneal dialysis modality, and means for monitoring system operation including means for generating a first alarm signal when system operation fails to satisfy a first predetermined set of criteria, means for generating a second alarm signal when system operation fails to satisfy a second predetermined set of criteria different than the first set of criteria, means for (i) suspending system operation in response to the first alarm signal; and
(ii) requiring user intervention to resume system operation, andmeans for (i) continuing system operation for a predetermined time period in response to the second alarm signal;
(ii) canceling the second alarm condition without user intervention when, after the predetermined time period, system operation satisfies the second set of criteria; and
(iii) initiating a first alarm condition when, after the predetermined time period, system operation fails to satisfy the second set of criteria. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A peritoneal dialysis system comprising
a source of liquid including tubing communicating with the liquid source, pumping means for moving liquid in the tubing from the source toward the pumping means, monitor means for generating a first command signal when the pumping means fails to move liquid in the tubing from the source toward the pumping means, and control means operative, in response to the first command signal, for operating the pumping means to attempt to move liquid in the tubing from the pumping means toward the source and, if successful, registering an empty source condition and, if not successful, registering an occluded source tubing condition.
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19. In a peritoneal dialysis system comprising a source of liquid including source tubing communicating with the liquid source and a destination reservoir for collecting liquid including destination tubing communicating with the destination reservoir, liquid pumping apparatus including
a pump linking the source tubing to the destination tubing and operable: -
in a first mode to draw liquid from the source through the source tubing and to expel the source liquid toward the destination reservoir through the destination tubing, and in a second mode to draw collected liquid from the destination reservoir through the destination tubing and to expel the collected liquid toward the source through the source tubing, means for operating the pump in the first mode to move source liquid from the source to the destination reservoir, monitor means for generating a first command signal when the pump fails to draw liquid from the source through the source tubing and for generating a second command signal when the pump fails to expel liquid through the destination tubing toward the destination, control means operative, in response to the first signal, for switching operation of the pump to the second mode to detect whether the pump expels liquid through the source tubing and, if so, registering an empty source condition and, if not, registering an occluded source tubing condition, the control means being further operative, in response to the second signal, for switching operation of the pump to the second mode to detect whether the pump draws liquid through the destination tubing and, if so, registering a full destination condition and, if not, registering an occluded destination tubing condition.
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20. A method of monitoring liquid flow in a peritoneal dialysis system from a source to a destination through tubing using a pumping mechanism comprising the steps of
generating a first command signal when the pumping mechanism fails to move liquid from the source in the tubing toward the pumping mechanism, and operating the pump mechanism in response to the first command signal to attempt to move liquid in the tubing from the pumping mechanism toward the source and, if successful, registering an empty source condition and, if not successful, registering an occluded source condition.
Specification