ANALYTE SENSOR
First Claim
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1. A method for measuring a concentration of an analyte in a vein of a host, the method comprising:
- passing a reference solution at a flow rate of from about 0.001 ml/min to about 0.02 ml/min past an analyte sensor configured to measure an analyte concentration, wherein the analyte sensor is a component of an analyte measuring system comprising a vascular access device, the analyte sensor, and electronics operatively connected to the analyte sensor and configured to generate a signal associated with the analyte concentration, wherein the analyte sensor resides within the vascular access device, and wherein the vascular access device and the analyte sensor are in fluid communication with a vein of a host;
measuring a signal associated with an analyte concentration of the reference solution;
drawing back a sample from the vein of the host; and
measuring a signal associated with an analyte concentration of the sample.
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Abstract
Systems and methods of use for continuous analyte measurement of a host'"'"'s vascular system are provided. In some embodiments, a continuous glucose measurement system includes a vascular access device, a sensor and sensor electronics, the system being configured for insertion into communication with a host'"'"'s circulatory system.
720 Citations
30 Claims
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1. A method for measuring a concentration of an analyte in a vein of a host, the method comprising:
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passing a reference solution at a flow rate of from about 0.001 ml/min to about 0.02 ml/min past an analyte sensor configured to measure an analyte concentration, wherein the analyte sensor is a component of an analyte measuring system comprising a vascular access device, the analyte sensor, and electronics operatively connected to the analyte sensor and configured to generate a signal associated with the analyte concentration, wherein the analyte sensor resides within the vascular access device, and wherein the vascular access device and the analyte sensor are in fluid communication with a vein of a host; measuring a signal associated with an analyte concentration of the reference solution; drawing back a sample from the vein of the host; and measuring a signal associated with an analyte concentration of the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for measuring a concentration of an analyte in a vein of a host, the method comprising:
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passing a reference solution at a first flow rate controlled by a flow control device past an analyte sensor configured to measure an analyte concentration, wherein the analyte sensor is a component of an analyte measuring system comprising a vascular access device, the analyte sensor, and electronics operatively connected to the analyte sensor and configured to generate a signal associated with the analyte concentration, wherein the analyte sensor resides within the vascular access device, and wherein the vascular access device and the analyte sensor are in fluid communication with a vein of a host; measuring a signal associated with an analyte concentration of the reference solution; drawing back a sample from the vein of the host at a second flow rate of from about 0.001 ml/min to about 2 ml/min; and measuring a signal associated with an analyte concentration of the sample, wherein the second flow rate is different from the first flow rate. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for measuring a concentration of an analyte in a circulatory system of a host, the method comprising:
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passing a reference solution past an analyte sensor configured to measure an analyte concentration, the analyte sensor comprising a component of an analyte measuring system comprising a vascular access device, the analyte sensor, and electronics operatively connected to the analyte sensor and configured to generate a signal associated with the analyte concentration, wherein the analyte sensor resides within the vascular access device, and wherein the vascular access device and the analyte sensor are in fluid communication with a circulatory system of a host; measuring a signal associated with an analyte concentration of the reference solution; drawing back a sample from the circulatory system; and measuring a signal associated with an analyte concentration of the sample, wherein the analyte measuring system further comprises a flow control device, wherein the flow control device is configured to meter flow during passing and drawing, and wherein the flow control device comprises a valve having a first pinch position and a second pinch position, wherein the first pinch position and the second pinch position are configured to at least partially pinch at least a portion of a tubing through which at least one of the reference solution is passed or the sample is drawn. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A method for measuring a concentration of an analyte in a circulatory system of a host, the method comprising:
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passing a reference solution past an analyte sensor configured to measure an analyte concentration, wherein the analyte sensor is a component of an analyte measuring system comprising a vascular access device, the analyte sensor, and electronics operatively connected to the analyte sensor and configured to generate a signal associated with the analyte concentration, wherein the analyte sensor resides within the vascular access device, and wherein the vascular access device and the analyte sensor are in fluid communication with a circulatory system of a host; measuring a signal associated with an analyte concentration of the reference solution; drawing back a sample from the circulatory system; and measuring a signal associated with the analyte concentration of the sample, wherein the analyte measuring system further comprises a flow control device, wherein the flow control device comprises a valve comprising a first discrete position and a second discrete position, wherein the valve is configured to meter flow in a first direction during passing and in a second direction opposite to the first direction during drawing, wherein drawing back a sample comprises drawing back a sample volume of about 500 microliters or less during movement of the valve from the second discrete position to the first discrete position. - View Dependent Claims (30)
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Specification