Medical treatment system and methods using a plurality of fluid lines
First Claim
1. A heating system for a peritoneal dialysis apparatus comprising:
- a pumping apparatus configured to pump dialysate into or out of a heater bag;
an electric heater configurable to operate at an AC line voltage in a range of about 100 to 120 volts or an AC line voltage in a range of about 200 to 240 volts;
a heater controller configured to control a temperature of the dialysate using the electrical heater;
a current sensor configured to measure current flow through the electric heater; and
a universal power supply configured to convert line voltage to one or more DC voltages to power the pumping apparatus and heater controller, and to configure the electric heater to operate at a voltage in a range of about 100 to 120 volts or in a range of about 200 to 240 volts, based on the measured current flow through the electrical heater.
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Accused Products
Abstract
A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include a control system that can adjust the volume of fluid infused into the peritoneal cavity to prevent the intraperitoneal fluid volume from exceeding a pre-determined amount. The control system can adjust by adding one or more therapy cycles, allowing for fill volumes during each cycle to be reduced. The control system may continue to allow the fluid to drain from the peritoneal cavity as completely as possible before starting the next therapy cycle. The control system may also adjust the dwell time of fluid within the peritoneal cavity during therapy cycles in order to complete a therapy within a scheduled time period. The cycler may also be configured to have a heater control system that monitors both the temperature of a heating tray and the temperature of a bag of dialysis fluid in order to bring the temperature of the dialysis fluid rapidly to a specified temperature, with minimal temperature overshoot.
295 Citations
15 Claims
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1. A heating system for a peritoneal dialysis apparatus comprising:
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a pumping apparatus configured to pump dialysate into or out of a heater bag; an electric heater configurable to operate at an AC line voltage in a range of about 100 to 120 volts or an AC line voltage in a range of about 200 to 240 volts; a heater controller configured to control a temperature of the dialysate using the electrical heater; a current sensor configured to measure current flow through the electric heater; and a universal power supply configured to convert line voltage to one or more DC voltages to power the pumping apparatus and heater controller, and to configure the electric heater to operate at a voltage in a range of about 100 to 120 volts or in a range of about 200 to 240 volts, based on the measured current flow through the electrical heater. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of configuring heating elements of an electrical heater for a peritoneal dialysis apparatus, the electrical heater comprising two heating elements, an end of each heating element connected to a common point, the method comprising:
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configuring the heating elements initially in a series configuration; connecting the electrical heater to line voltage; measuring electrical current flow through the electrical heater; determining from the measured current flow whether the line voltage is in a range of about 100-120 volts, or in a range of about 200-240 volts; providing a user of the peritoneal dialysis apparatus with information about the determined line voltage; and receiving a signal from the user confirming the determined line voltage before finally configuring the heating elements in either a series configuration or a parallel configuration.
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Specification