Self-Test of a Dual-Probe Chlorine Sensor for a Hemodialysis System
First Claim
1. A self-testing chlorine monitoring element in a hemodialysis water treatment system comprising an injection system adapted to subject a chlorine-specific probe to a known concentration of a solution bearing a halogen on a user-defined periodic basis.
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Accused Products
Abstract
In a hemodialysis system, a microprocessor periodically controls the injection of a quantity of a halogen solution, preferably an iodine solution, to trigger an event alarm. At a predetermined time, the solution is circulated into a chlorine-specific sensor probe to the point of exceeding a threshold on the sensor system. This event is then recorded and a chlorine alarm event light is illuminated. After the slug of solution is flushed from the system, the alarm clears but the event light remains lit. Then, the next time an operator arrives to operate the hemodialysis system, she can verify that the monitor recorded a chlorine event since the previous day. She then resets the event light.
23 Citations
28 Claims
- 1. A self-testing chlorine monitoring element in a hemodialysis water treatment system comprising an injection system adapted to subject a chlorine-specific probe to a known concentration of a solution bearing a halogen on a user-defined periodic basis.
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8. A self-testing chlorine monitoring system comprising:
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a first, pretreatment probe block comprising a first chlorine-specific probe, a first source of a halogen solution, and means to periodically introduce a halogen solution from the source to the first chlorine-specific probe; and a second, post-treatment probe block comprising a second chlorine-specific probe, a second source of a halogen solution, and means to periodically introduce a halogen solution from the source to the second chlorine-specific probe. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification