Apparatus and methods for analyzing body fluid samples
First Claim
1. Apparatus for monitoring a predetermined parameter of a patient'"'"'s body fluid and infusing the patient, comprising:
- an infusion line having a patient end configured for fluid communication with a blood vessel of the patient;
a source of an infusion fluid, said source in fluid communication with said infusion line;
a reversible infusion pump coupled to the infusion line;
a body fluid sensor assembly mounted in fluid communication with the infusion line and including a first sensor, said first sensor comprising an optical sensor configured to provide a signal indicative of a predetermined parameter of fluid present in the infusion line near said first sensor; and
a controller that is configured to operate the infusion pump in a forward direction, to pump the infusion fluid through the infusion line toward the patient end, and that is configured to intermittently interrupt its operation of the infusion pump in the forward direction to operate the infusion pump in a rearward direction, to draw a body fluid sample from the patient through the patient end of the infusion line.
3 Assignments
0 Petitions
Accused Products
Abstract
An apparatus is provided for monitoring a predetermined parameter of a patient'"'"'s body fluid while infusing an infusion fluid into the patient. The apparatus comprises an infusion line and a catheter configured for insertion into a blood vessel of the patient, and a reversible infusion pump connected between a source of an infusion fluid and the infusion line and catheter. The apparatus further comprises a body fluid sensor assembly mounted in fluid communication with the infusion line and which includes a first sensor and a sample cell. The first sensor provides a signal indicative of a predetermined parameter of any fluid present in the infusion line. The sample cell is substantially transmissive to light comprising a wavelength λ. The apparatus further comprises a controller that is configured to operate the infusion pump in a forward direction so as to pump the infusion fluid through the infusion line and catheter for infusion into the patient. The controller is configured to intermittently interrupt its operating of the infusion pump in the forward direction to operate the infusion pump in a rearward direction so as to draw a body fluid sample from the patient through the catheter and infusion line. The body fluid sample drawn from the patient is disposed such that a first portion of the body fluid sample is in sensing contact with the first sensor of the body fluid sensor assembly, and a second portion of the body fluid sample is disposed within the sample cell of the body fluid sensor assembly. The controller further is configured to monitor the signal provided by the first sensor of the body fluid sensor assembly and to detect a change in the signal indicative of the arrival of the body fluid sample at the first sensor. The controller, in response to detecting the arrival of the body fluid sample at the first sensor, is configured to cease its operating of the infusion pump in the rearward direction. The signal produced by the first sensor provides an indication of a predetermined parameter of the patient'"'"'s body fluid when the body fluid sample is in sensing contact with the first sensor.
268 Citations
92 Claims
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1. Apparatus for monitoring a predetermined parameter of a patient'"'"'s body fluid and infusing the patient, comprising:
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an infusion line having a patient end configured for fluid communication with a blood vessel of the patient;
a source of an infusion fluid, said source in fluid communication with said infusion line;
a reversible infusion pump coupled to the infusion line;
a body fluid sensor assembly mounted in fluid communication with the infusion line and including a first sensor, said first sensor comprising an optical sensor configured to provide a signal indicative of a predetermined parameter of fluid present in the infusion line near said first sensor; and
a controller that is configured to operate the infusion pump in a forward direction, to pump the infusion fluid through the infusion line toward the patient end, and that is configured to intermittently interrupt its operation of the infusion pump in the forward direction to operate the infusion pump in a rearward direction, to draw a body fluid sample from the patient through the patient end of the infusion line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of extracting and analyzing bodily fluids from a patient at the point of care for said patient comprising:
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establishing fluid communication between an analyte detection system, a sensor assembly, and a bodily fluid in said patient, wherein said sensor assembly comprises a first sensor;
drawing from said patient a portion of said bodily fluid;
separating from said drawn portion a first component of said bodily fluid, while said analyte detection system and said sensor assembly remain in fluid communication with said patient; and
with said analyte detection system, analyzing said first component to measure a concentration of an analyte. - View Dependent Claims (16, 17, 18, 19, 20)
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21. Apparatus for extracting and analyzing bodily fluids from a patient at the point of care for said patient comprising:
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an infusion line having a patient end configured for fluid communication with a blood vessel of the patient;
a source of an infusion fluid, said source in fluid communication with said infusion line;
a reversible infusion pump coupled to the infusion line;
a body fluid sensor assembly mounted in fluid communication with the infusion line and including a first sensor, said first sensor configured to provide a signal indicative of a predetermined parameter of fluid present in the infusion line near said first sensor;
a controller that is configured to operate the infusion pump in a forward direction, to pump the infusion fluid through the infusion line toward the patient end, and that is configured to intermittently interrupt its operation of the infusion pump in the forward direction to operate the infusion pump in a rearward direction, to draw a body fluid sample from the patient through the patient end of the infusion line;
a fluid component separator mounted in fluid communication with said infusion line and configured to separate from said body fluid sample a first component of said body fluid sample. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. Apparatus for monitoring a predetermined parameter of a patient'"'"'s blood while infusing an infusion fluid into the patient, comprising:
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an infusion line having a patient end configured for insertion into a blood vessel of the patient;
a source of an infusion fluid, said source in fluid communication with said infusion line;
a reversible infusion pump coupled to the infusion line;
a blood chemistry sensor assembly mounted in fluid communication with the infusion line and including a first sensor that provides a signal indicative of a predetermined parameter of fluid present in the infusion line;
a device operatively connected to the apparatus to provide one or more anti- clotting agents to at least a portion of said infusion line;
a controller configured to operate the infusion pump in a forward direction, to pump the infusion fluid through the patient end of the infusion line for infusion into the patient, and configured to intermittently interrupt its operation of the infusion pump in the forward direction to operate the infusion pump in a rearward direction, to draw a blood sample from the patient through the patient end of the infusion line into sensing contact with the first sensor of the blood chemistry sensor assembly. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38)
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39. A patient status monitoring system, said system comprising:
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a first body fluid analyzer;
a body fluid sensor assembly including a first sensor that provides a signal indicative of a predetermined parameter of fluid present in the body fluid sensor assembly;
a controller configured to monitor said signal from said body fluid sensor assembly and to detect a change in said signal indicative of an arrival of said fluid present in the body fluid sensor assembly at said first sensor;
a fluid passageway configured to provide fluid communication among said first body fluid analyzer, said body fluid sensor assembly, and a body fluid in a patient;
said first body fluid analyzer configured to be in communication with a data network, said data network including at least one data file; and
said first body fluid analyzer configured to access said at least one data file via said data network. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. An analyte detection system comprising:
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a body fluid sensor assembly including a first sensor, the first sensor configured to provide information relating to a measurement of at least one analyte in a body fluid sample that is in sensing contact with the first sensor;
a processor; and
stored program instructions executable by said processor such that said system;
(a) identifies, based on said measurement, one or more possible interferents to the measurement of said at least one analyte in the body fluid sample;
(b) calculates a calibration which reduces error attributable to said one or more possible interferents;
(c) applies the calibration to the measurement; and
(d) estimates, based on the calibrated measurement, a concentration of said at least one analyte in the body fluid sample. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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65. Apparatus for analyzing the composition of bodily fluid, said apparatus comprising:
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a first fluid passageway having a patient end which is configured to provide fluid communication with a bodily fluid within a patient;
at least one pump coupled to said first fluid passageway, said at least one pump configured to have an infusion mode in which said pump is operable to deliver infusion fluid to said patient through said patient end and a sample draw mode in which said pump is operable to draw a sample of said bodily fluid from said patient through said patient end;
a controller that is configured to operate said at least one pump in said infusion mode and in said sample draw mode;
a spectroscopic analyte detection system accessible via said first fluid passageway such that said analyte detection system can receive at least one component of said drawn sample of bodily fluid, and determine a concentration of at least one analyte, said analyte detection system being spaced from said patient end of said first fluid passageway;
a body fluid sensor assembly mounted in fluid communication with the first fluid passageway at or near said patient end and spaced from said analyte detection system, said body fluid sensor assembly including a first sensor and a second sensor;
wherein the first sensor is configured to sense a first property indicative of the fluid within said first fluid passageway and to provide a first signal indicative of said first property;
wherein the second sensor is configured to sense a second property indicative of the fluid within said first fluid passageway and to provide a second signal indicative of said second property; and
wherein the controller is configured to monitor the first signal provided by the first sensor and to detect a change in the first signal indicative of an arrival of the drawn sample of body fluid at the first sensor. - View Dependent Claims (66, 67, 68, 69, 70)
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71. A fluid handling and analysis system, said system comprising:
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a fluid transport network comprising at least a first fluid passageway, said fluid transport network including a patient end configured to maintain fluid communication with a bodily fluid in a patient;
a sample analysis chamber and waste container, each accessible by said fluid transport network;
a bodily fluid sensor assembly in fluid communication with said fluid transport network and including a first sensor that provides a signal indicative of a predetermined parameter of fluid present in said first fluid passageway;
a pump unit in operative engagement with said fluid transport network, said pump unit configured to have an infusion mode in which said pump unit delivers an infusion fluid to said patient through said patient end and a sample draw mode in which said pump unit draws a volume of said bodily fluid from said patient through said patient end, toward said sample analysis chamber;
wherein said fluid transport network and said pump unit are configured to draw a volume of said bodily fluid from said patient, isolate a fraction of said bodily fluid from said volume, and pass said fraction to said sample analysis chamber and then to said waste container. - View Dependent Claims (72, 73, 74, 75, 76, 77, 78, 79, 80)
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81. Apparatus for monitoring a predetermined parameter of a patient'"'"'s body fluid while infusing an infusion fluid into the patient, comprising:
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an infusion line having a patient end configured for insertion into a blood vessel of the patient;
a source of an infusion fluid, said source in fluid communication with said infusion line;
a reversible infusion pump coupled to the infusion line;
a body fluid sensor assembly mounted in fluid communication with the infusion line, said sensor assembly including a temperature sensor that provides temperature information relating to fluid present in the body fluid sensor assembly, and a first sensor that provides a signal indicative of a parameter of fluid present in the body fluid sensor assembly;
a controller configured to operate the infusion pump in a forward direction, to pump the infusion fluid through the infusion line for infusion into the patient, and configured to intermittently interrupt its operation of the infusion pump in the forward direction to operate the infusion pump in a rearward direction, to draw a body fluid sample from the patient through the patient end of the infusion line into sensing contact with the first sensor and the temperature sensor of the body fluid sensor assembly;
wherein the controller further is configured to monitor the signal provided by the first sensor of the body fluid sensor assembly and to detect a change in the first signal indicative of an arrival of the body fluid sample at the first sensor;
wherein the signal produced by the first sensor provides an indication of a predetermined parameter of the patient'"'"'s body fluid when the body fluid sample is in sensing contact with the first sensor; and
wherein the controller is configured to acquire the temperature information and to use the temperature information when determining said predetermined parameter of the patient'"'"'s body fluid. - View Dependent Claims (82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92)
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Specification