Body fluid analysis system employing a sensor and method for flushing and single-point calibration of the sensor
AssigneeSiemens Elema AB
InventorPontus Von Bahr
Life of this patent
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Abstract
In a body fluid analysis system having a sensor and a method for flushing and single-point calibration of the sensor, a container holding at least one flushing liquid has a first tube connected thereto at a first point and at a second point to form a closed system. The sensor is connected to the first tube, and to a second tube for connection to a patient. A pump is connected to the first tube between the container and the sensor.
Claims14
A body fluid analysis system for extracorporeal body fluid analysis comprising:
- a body fluid analysis sensor;
- a container containing a flushing liquid;
- a first tube connected to said container at a first point and at a second point, spaced from said first point, to form a closed system, said sensor being connected to said first tube;
- a second tube connected to said sensor and adapted for connection to a body fluid source to transfer body fluid between said sensor and said body fluid source;
- and
- a pump connected to said first tube between said first point and said sensor for pumping flushing liquid and body fluid to and from said sensor and for pumping the flushing liquid to and from said container.
A method for flushing and single-point calibration of a sensor in a closed, extracorporeal body fluid analysis system, comprising the steps of:
- containing a flushing liquid in a container;
- connecting a first tube to said container at a first point and at a second point, spaced from said first point, to form a closed system, said first tube having a fluid flow path associated therewith;
- disposing a sensor in said fluid flow path of said first tube;
- connecting a second tube between said sensor and a body fluid source for exchanging body fluid between said sensor and said body fluid source;
- disposing a pump in said first tube between said first point and said sensor;
- providing body fluid from said body fluid source to said sensor;
- using said sensor to analyze said body fluid;
- operating said pump to pump said body fluid from said sensor to said body fluid source;
- operating said pump to pump flushing liquid from said container through said sensor for flushing said sensor;
- and
- collecting flushing liquid in said container after passage through said sensor.
Dependencies are inferred from the claim text.