System and method for measuring a bioanalyte such as lactate
First Claim
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1. An on-line lactate sensor arrangement comprising:
- a lactate sensor;
a first fluid flow line for drawing a fluid sample from a patient and conveying the fluid sample to the lactate sensor;
a source of sensor calibration fluid;
a second fluid flow line providing fluid communication between the source of sensor calibration fluid and the lactate sensor; and
a source of pressure for pushing sensor calibration fluid from the source of sensor calibration fluid toward the lactate sensor, and a source of vacuum for drawing the fluid sample from the patient toward the lactate sensor, wherein both the source of pressure and the source of vacuum are provided by a syringe.
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Abstract
The present disclosure relates to an on-line lactate sensor arrangement. The sensor arrangement includes a lactate sensor, a catheter for withdrawing a test sample, and a first fluid flow line provided fluid communication between the lactate sensor and the catheter. The sensor arrangement also includes a source of sensor calibration and anticoagulant solution, and second fluid flow line providing fluid communication between the source of sensor calibration and anticoagulant solution and the lactate sensor.
986 Citations
39 Claims
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1. An on-line lactate sensor arrangement comprising:
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a lactate sensor; a first fluid flow line for drawing a fluid sample from a patient and conveying the fluid sample to the lactate sensor; a source of sensor calibration fluid; a second fluid flow line providing fluid communication between the source of sensor calibration fluid and the lactate sensor; and a source of pressure for pushing sensor calibration fluid from the source of sensor calibration fluid toward the lactate sensor, and a source of vacuum for drawing the fluid sample from the patient toward the lactate sensor, wherein both the source of pressure and the source of vacuum are provided by a syringe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 39)
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23. A sensor arrangement comprising:
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a sensor; a syringe including a syringe housing defining a piston chamber having a longitudinal axis and a piston mounted within the chamber, the piston being reciprocally moveable within the chamber along the longitudinal axis, the syringe housing defining first and second ports that provide access to the piston chamber, the first port being spaced from the second port in a direction extending generally along the longitudinal axis; a first fluid flow line providing fluid communication between the sensor and a sample fluid; a second fluid flow line providing fluid communication between the second port of the syringe housing and the sensor; and a source of calibrant solution including calibrant for calibrating the sensor, the source of calibrant solution being in fluid communication with the first port of the syringe housing. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A fluid control device comprising:
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a housing defining a piston chamber having a longitudinal axis, the housing defining first and second ports that provide access to the piston chamber, the first port being spaced from the second port in a direction generally along the longitudinal axis; and a piston mounted within the piston chamber and reciprocally moveable along the longitudinal axis, the piston including a blocking portion for blocking and unblocking the first port, the blocking portion having a length that is at least as long as a maximum stroke length of the piston, the maximum stroke length of the piston being measured from a top of the first port to a farthest point the piston penetrates within the piston chamber. - View Dependent Claims (37, 38)
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Specification