Blood monitoring system
First Claim
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1. A device for periodically monitoring at least one predetermined parameter of blood from a patient, comprising:
- access device for gaining access to said blood;
a pump to withdraw blood from the patient in a predetermined time schedule;
a processor for processing a plurality of instructions that define said predetermined time schedule;
a pressure sensing apparatus attached to the pump; and
a disposable cassette comprising a first storage area for storing at least one unused test substrate;
a fluid dispensing mechanism for dispensing blood onto one unused test substrate;
a plurality of tubing to bring said fluid received via said access device into physical contact with said fluid dispensing mechanism; and
a second storage area for storing said at least one used test substrate.
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Abstract
The present invention is directed towards apparatuses and methods for the automated measurement of blood analytes and blood parameters for bedside monitoring of patient blood chemistry. Particularly, the current invention discloses a programmable system that can automatically draw blood samples at a suitable programmable time frequency (or at predetermined timing), can automatically analyze the drawn blood samples and immediately measure and display blood parameters such as glucose levels, hematocrit levels, hemoglobin blood oxygen saturation, blood gases, lactate or any other blood parameter.
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Citations
29 Claims
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1. A device for periodically monitoring at least one predetermined parameter of blood from a patient, comprising:
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access device for gaining access to said blood;
a pump to withdraw blood from the patient in a predetermined time schedule;
a processor for processing a plurality of instructions that define said predetermined time schedule;
a pressure sensing apparatus attached to the pump; and
a disposable cassette comprising a first storage area for storing at least one unused test substrate;
a fluid dispensing mechanism for dispensing blood onto one unused test substrate;
a plurality of tubing to bring said fluid received via said access device into physical contact with said fluid dispensing mechanism; and
a second storage area for storing said at least one used test substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for periodically monitoring at least one predetermined parameter of blood from a patient by accessing blood with a catheter, comprising the steps of:
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automatically withdrawing blood from the patient in a predetermined time schedule using a pump;
dispensing a small amount of blood through a dispenser;
bringing at least one test substrate in contact with the dispensed blood wherein said test substrate is contained in a disposable cassette comprising a first storage area for storing at least one unused test substrate, a fluid dispensing mechanism for dispensing fluid onto one unused test substrate, a plurality of tubing to bring said fluid into physical contact with said fluid dispensing mechanism; and
a second storage area for storing said at least one used test substrate; and
processing a signal produced by the sensor upon contact with the dispensed blood to measure said at least one parameter. - View Dependent Claims (14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 25, 26)
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20. A device for monitoring glucose levels in blood, comprising:
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a syringe pump in fluid communication with a plurality of tubing to withdraw blood from the patient in a predetermined time schedule;
a processor for processing a plurality of instructions that define said predetermined time schedule;
a pressure sensing apparatus attached to the pump wherein said pressure sensing apparatus provides a signal indicative of an occlusion in said plurality of tubing; and
a plurality of sensors packaged in a plurality of sealed compartments wherein a first substantially sealed compartment stores a plurality of unused sensors and a second substantially sealed compartment stores a plurality of used sensors. - View Dependent Claims (27, 28, 29)
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Specification