Patent Application
20130102087
The present invention relates to the field of human diagnostics, in general, and to fluorescent-based analysis of cell-associated biological markers, in particular.
There is a great requirement for fast and accurate information in the field of medical diagnostics. It is generally preferred that therapeutic agents and overall patient treatment are not applied until actionable patient diagnostic information is available. Numerous methodologies have been developed for identifying causative agents for a vast number of ailments. PCR, ELISA, flow-cytometry, lateral flow, and other methods are routinely used for identifying pathogenic species associated with human illness.
Sepsis is an extreme condition resulting from body responses to a systemic inflammatory response syndrome (SIRS) caused by a pathogenic agent. Sepsis may often lead to massive organ failure and death. Sepsis is generally identified by general patient features such as body temperature, heart rate, respiratory rate, and white blood count. Of late, several groups have identified markers or combinations of biological markers that may serve to identify sepsis occurring in a patient. Knowing that a patient is in a septic state or may be heading towards a septic response to a bacterial, viral, or fungal infection is critical for proper patient management and drug selection.
U.S. Pat. No. 4,745,285, to Recktenwald and Chen, teaches a method for determining one or more characteristics of particles using multiple fluorescence analysis, which involves directing an incident light beam at the particles under analysis. The particles include at least three fluorescent markers each having different emission spectra. The incident light beam causes the excitation of the markers by light at a single wavelength whereby different wavelengths of fluorescence are emitted from the particles. Different fluorescence emissions associated with the particles under analysis are simultaneously detected. This method further includes associating the detected fluorescence with one or more characteristics of the particles. An apparatus is also part of the present invention for carrying out the aforementioned method.
U.S. Pat. No. 5,627,040, to Bierre and Mikaels, teaches a method for autoclustering N-dimensional datastreams. The invention has particular utility in analyzing multi-parameter data from a flow-cytometer, and more particularly has utility in analyzing data from whole blood cells tagged with fluorescently labelled CD3, CD4, and CD8 monoclonal antibodies, to which a known number of fluorescent microbeads have been added.
U.S. Pat. No. 6,636,623, to Nelson et al., describes a system and method for rapidly detecting cells associated with malignancy and disease using molecular marker compartmentalization includes an optical tomography (OT) or a flow optical tomography (FOT) instrument capable of producing various optical projection images (or shadowgrams) containing accurate density information from a cell or cells labelled with tagged molecular probes or stains, a computer and software to analyze and reconstruct the projection images into a multi-dimensional data set, and automated feature collection and object classifiers. The system and method are particularly useful in the early detection of cancers, such as lung cancer, using cells from sputum or cheek scrapings, and cervical/ovarian cancer using a cervical scraping. The system may be used to detect rare cells in specimens including blood.
U.S. Pat. No. 7,024,316 to Ellison, et al. describes a flow cytometry apparatus and methods to process information incident to particles or cells entrained in a sheath fluid stream allowing assessment, differentiation, assignment, and separation of such particles or cells even at high rates of speed. A first signal processor individually or in combination with at least one additional signal processor for applying compensation transformation on data from a signal. Compensation transformation may involve complex operations on data from at least one signal to compensate for one or numerous operating parameters. Compensated parameters may be returned to the first signal processor for provide information upon which to define and differentiate particles from one another.
U.S. Patent Application 20050255600, to Padmanabhan et al., describes a sample analyzer cartridge for use at a point of care of a patient such as in a doctor's office, in the home, or elsewhere in the field. By providing a removable and/or disposable cartridge with all of the needed reagents and/or fluids, the sample analyzer may be reliably used outside of the laboratory environment, with little or no specialized training.
International Patent Application WO 2006/0055816, to Davis et al., describes a method of quantifying CD64 and CD163 expression in leukocytes and, specifically to a kit for use with a flow cytometer, including a suspension of quantitative fluorescent microbead standards, fluorescent labelled antibodies directed to CD64 and CD 163, and analytical software. The software is used to take information on the microbead suspension and fluorescent labelled antibodies from a flow cytometer and analyze data, smooth curves, calculate new parameters, provide quality control measures and notify of expiration of the assay system.
International Patent Application WO 2008/124,589, to Tai et al., describes particular embodiments relating to a microfluidic device that may be utilized for cell sensing, counting, and/or sorting. Particular aspects relate to a microfabricated device that is capable of differentiating single cell types from dense cell populations. One particular embodiment relates a device and methods of using the same for sensing, counting, and/or sorting leukocytes from whole, undiluted blood samples.
International Patent Application WO2009/003493, to Jacobsen et al., teaches methods for assaying an entity present in a sample. The method comprises a number of individual steps, such as the steps of obtaining a sample, preparing the sample for assaying, and assaying the sample. The method may comprise further optional processing steps associated with either sample processing or processing of data obtained as a result of having assayed the sample. The sample may initially be assayed e.g. for presence of one or more entities. The step of assaying the sample may further comprise the step of analyzing one or more characteristics of the one or more entities. On the basis of the determination of the presence of the one or more entities in the sample, or the result of an analysis of the one or more entities, the method may comprise one or more further processing steps, such as data processing steps and/or sample processing steps associated with partitioning and/or isolation of the one or more entities in the sample which was subjected to the assaying procedure.
Many prior art detection methods require the use of expensive laboratory analyzers, which provide graphical/data outputs. These outputs are analyzed by professional staff in order to provide a diagnosis or determination. These kinds of detection methods are expensive, professional labour-intensive and typically centralized at a hospital laboratory. There is thus still a need to provide diagnostic apparatus and methods for quick diagnosis of a patient status.
It is an object of the present invention to provide a device, method and systems, which allow for analyzing particles associated with a bodily fluid for the purpose of determining the health state of a patient.
There is thus provided according to an embodiment of the present invention, a system for determination of a medical condition, the system including;
a) a disposable cartridge adapted to receive a volume of a body fluid, the cartridge including a plurality of sections, at least one of the sections adapted to react at least one reactant with the bodily fluid to form a pre-treated sample; and
b) an optics unit including;
wherein the at least one excitation illumination and the at least one multi-spectral emission detector are disposed on the same side of the cartridge; and wherein the optics unit is adapted to detect a plurality of spectrally distinct signals generated by interaction of the radiation and the pre-treated sample in the cartridge, thereby determining the medical condition.
Additionally, according to an embodiment of the present invention, the system further includes a computer, the computer adapted to receive data related to the plurality of spectrally distinct signals and a processor, adapted to process the data and to output at least one output related to the medical condition.
Moreover, according to an embodiment of the present invention, each signal of the plurality of spectrally distinct signals is associated with at least one predetermined biological marker.
Furthermore, according to an embodiment of the present invention, the at least one predetermined biological marker is specific to CD64.
Further, according to an embodiment of the present invention, the at least one predetermined biological marker is specific to CD163.
Yet further, according to an embodiment of the present invention, the a plurality of sections includes at least one of;
a) a body fluid aspiration section adapted to receive the body fluid directly or indirectly from the patient;
b) a pre-analytical sample processing section;
c) a sample excitation/interaction section; and
d) a spent sample disposal section.
Additionally, according to an embodiment of the present invention, the pre-analytical sample processing section includes at least one of the following;
Additionally, according to an embodiment of the present invention, the sample excitation/interaction section includes a thin metallic lining layer.
Moreover, according to an embodiment of the present invention, the optics unit includes an objective, the objective being adapted to both;
a) pass the radiation to the pre-treated sample; and
b) receive the plurality of spectrally distinct signals.
Furthermore, according to an embodiment of the present invention, the sample excitation/interaction section is disposed perpendicularly to a light path of the objective.
Additionally, according to an embodiment of the present invention, the at least one excitation illumination includes at least one of a laser, and light emitting diode (LED) and an arc lamp.
Furthermore according to an embodiment of the present invention, the pre-treated sample includes particles adapted to flow in an essentially single-file manner past the radiation.
Moreover, according to an embodiment of the present invention, the medical condition is sepsis.
Additionally, according to an embodiment of the present invention, the reader unit includes a plurality of wavelength-specific photomultiplier tubes.
Further, according to an embodiment of the present invention, the particles are white blood cells.
Additionally, according to an embodiment of the present invention, the white blood cells include neutrophils.
Moreover, according to an embodiment of the present invention, the at least one reactant includes multiple fluorescently-tagged antibodies specific for biological markers.
Furthermore, according to an embodiment of the present invention, the system is contained in a portable container of dimension of less than 50×30×15 cm.
According to another embodiment of the present invention, the system weighs less than 15 kg.
There is thus provided according to another embodiment of the present invention, a method for determining the existence of a health condition in a patient, the method including;
a) reacting at least one reactant with a bodily fluid in a multi-sectioned disposable cartridge to form a treated sample;
b) impinging radiation, from an optics unit, on the treated sample in the disposable cartridge thereby generating a plurality of spectrally distinct signals in the direction of the optics unit; and
c) detecting a plurality of spectrally distinct signals in the optic unit generated by interaction of the radiation and the pre-treated sample, thereby determining the medical condition.
Additionally, according to an embodiment of the present invention, steps a) to c) are performed sequentially on a plurality of the pre-treated samples.
According to another embodiment of the present invention, steps a) to c) are performed on 4 to 100 samples in one hour.
Moreover, according to an embodiment of the present invention, each signal of the plurality of spectrally distinct signals is associated with at least one predetermined biological marker.
Additionally, according to an embodiment of the present invention, the at least one predetermined biological marker is specific to CD64.
Furthermore, according to an embodiment of the present invention, the at least one predetermined biological marker is specific to CD163.
According to an embodiment of the present invention, the reacting step includes at least one of
a) receiving the body fluid directly or indirectly from the patient;
b) performing at least one pre-analytical reaction;
c) exciting the treated sample; and
d) disposing the treated sample in a spent sample disposal section.
Additionally, according to an embodiment of the present invention, the at least one pre-analytical reaction includes at least one of the following;
Additionally, according to an embodiment of the present invention, the method further includes performing steps a) to c) on a first sample from the patient.
Furthermore, according to an embodiment of the present invention, the method further includes waiting for a period of time and then repeating steps a) to c) on a further sample.
Moreover, according to an embodiment of the present invention, the bodily fluid includes less than 100 microliters.
Further, according to an embodiment of the present invention, the medical condition is sepsis.
There is thus provided according to a further embodiment of the present invention, a computer software product for determining the existence of a health condition in a patient, the product including a computer-readable medium in which program instructions are stored, which instructions, when read by a computer, cause the computer to;
a) react at least one reactant with a bodily fluid in a multi-sectioned disposable cartridge to form a treated sample;
b) impinge radiation, from an optics unit, on the treated sample in the disposable cartridge thereby generating a plurality of spectrally distinct signals in the direction of the optics unit; and
c) detect a plurality of spectrally distinct signals in the optic unit generated by interaction of the radiation and the pre-treated sample, thereby determining the medical condition.
The invention also provides a device for determining state of health of a patient, including: a disposable cartridge capable of receiving a volume of a bodily fluid, the cartridge including a plurality of chemicals for analytical pretreatment of the fluid; at least one light source, wherein the light source is capable of illuminating particles in the fluid, wherein the particles flow or move past light produced by the light source; and, a reader unit, the reader unit being capable of detecting a plurality of spectrally distinct fluorescent signals generated by interaction of the light and the particles in the cartridge, wherein each signal is associated with at least one predetermined biological marker.
In one aspect of the device, the light source is a laser. In another aspect of the device, the light source is an LED. In another aspect of the device, the light source is an arc lamp.
In another aspect of the device, the particles flow in an essentially single-file manner past the light such that even with one or more particles in the interaction area individual particle information may be obtained.
In another aspect of the device, the particles are moved in an essentially single-file manner past the light such that even with one or more particles in the interaction area individual particle information is/may be obtained.
In another aspect of the device, the bodily fluid is blood or derived from blood.
In another aspect of the device, the disease state is sepsis.
In another aspect of the device, the reader unit includes a plurality of wavelength-specific photomultiplier tubes.
In another aspect of the device, the reader unit includes a plurality of wavelength-specific photomultiplier array elements.
In another aspect of the device, the reader unit includes a plurality of wavelength-specific avalanche photodiodes.
In another aspect of the device, the reader unit includes a plurality of wavelength-specific avalanche photodiode array elements.
In another aspect of the device, the reader unit includes a plurality of wavelength-specific photodetectors.
In another aspect of the device, the reader unit includes a plurality of wavelength-specific photodetector elements.
In another aspect of the device, the at least one predetermined biological marker is specific to CD64.
In still another aspect of the device, the particles are white blood cells.
In another aspect of the device, the particles are beads.
In another aspect of the device, the plurality of chemicals includes multiple fluorescently-tagged antibodies specific for predetermined biological markers.
In another aspect of the device, the reader unit includes 8 photomultiplier tubes or array elements.
In another aspect of the device, there is further including an algorithm for converting fluorescent data to presence of predetermined biological marker information.
In another aspect of the device, the white cells are neutrophils.
In another aspect of the device, a sequence of measurements from the patient is stored or sequences of measurements from the patient are stored.
In another aspect of the device, a sequence of measurements from the patient is analyzed.
The invention includes a method for determining the existence of a predetermined health condition in a patient, including: providing a blood sample; placing a portion of the blood sample in a disposable cartridge, wherein the cartridge includes a plurality of chemicals for treatment of the sample; passing the portion of the blood sample through a region of the cartridge, wherein the region is partially exposed to light generated from at least one light source; recording absorption data from interaction of light with particles in the blood sample; analyzing absorption data; determining absorption characteristics by wavelength; and, presenting to a user of the device the presence of the predetermined disease state in response to the absorption characteristics.
In one aspect of the method, the at least one molecular marker is a plurality of molecular markers. In another aspect of the method, the molecular markers are associated with a plurality of unique fluorescent compounds. In another aspect of the method, the patient is analyzed for the presence of the predetermined disease state on at least two unique occasions. In another aspect of the method, the portion of the blood sample is less than 100 microliters. In another aspect of the method, the predetermined disease is sepsis. In still another aspect of the method, there is further including analyzing the blood sample for left shift of neutrophils.
The invention further includes a device for detecting at least three fluorescent tags associated with three unique molecular markers associated with a predetermined disease state, including: a disposable cartridge capable of receiving a volume of a whole blood sample, the cartridge including a plurality of chemicals for analytical pretreatment of the blood; at least one light source, wherein the light source is capable of illuminating particles in the fluid, wherein the combination of cartridge structure, particle flow, illumination and signal processing allows the spectral signature of individual particles to be determined. For example: particles flow in an essentially single-file manner in the blood past light produced by the light source such that even with one or more particles in the interaction area individual particle information is/may be obtained; and, a reader unit, the reader unit being capable of detecting a plurality of spectrally distinct fluorescent signals generated by interaction of the light and the particles in the cartridge, wherein each signal is associated with at least one of the molecular markers.
In one aspect of the device, the fluorescent compounds include FITC, PE, and Syto.
In another aspect of the device, the sequence of stored measurements from a patient is analyzed to determine the health state of the patient.
The system of the present invention offers several advantages over the known art. Firstly, the system comprises an arrangement of optical elements, which allows for construction and use of a “small” flow-cytometer that may be moved to patient bedside for point of care (POC) applications. The system allows for detection and resolution of a plurality of unique fluorescent signals, each associated with a predetermined molecular marker. The invention also includes a unique disposable cartridge that allows for analytical pretreatment of a sample so as to facilitate binding of marker-specific fluorescent probes to their targets in a blood sample. The cartridge also facilitates passage of white blood cells (or other particles) beneath the objective of the cytometer optics to allow for measurement and detection of the presence/absence of predetermined molecular markers. Typical markers include but are not limited to CD64 to identify activated neutrophils, CD163 to identify and differentiate monocytes expressing CD64 from neutrophils expressing CD64, independent of measurements of white blood cell type, number, size and shape. Portions of the system optics may be included in the disposable cartridge, while various methods could be employed to cause sample to pass through a capillary section in the cartridge for interaction with cytometer light. The cytometer may work with laser, LED, or lamp light as per specific application and wavelengths required for testing.
The combination of an epi-optical system, which requires only single sided access to the detection region of the cartridge thus allowing special surface or other treatment of the cartridge significantly reduces the auto-fluorescence of the cartridge material. This reduction is not possible when excitation is introduced on one side of the detection channel and emission is detected on the other side.
The present invention will be more fully understood from the following detailed description of the preferred embodiments thereof, taken together with the drawings.
The invention will now be described in connection with certain preferred embodiments with reference to the following illustrative figures so that it may be more fully understood.
With specific reference now to the figures in detail, it is stressed that the particulars shown are by way of example and for purposes of illustrative discussion of the preferred embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the invention. In this regard, no attempt is made to show structural details of the invention in more detail than is necessary for a fundamental understanding of the invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the invention may be embodied in practice.
In the drawings:
In all the figures similar reference numerals identify similar parts.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known circuits and control logic have not been shown in detail in order not to unnecessarily obscure the present invention. The following definitions are for aiding in understanding the present invention.
Certain terms are now defined in order to facilitate better understanding of the present invention. Where terms are not defined, it is understood that the generally-accepted meaning in the relevant art may be associated said terms. Thus, “blood”, “white cells”, and “antibodies” may have their normal meanings as understood in the biological arts, whereas “laser”, “beam splitter”, and “dichroic filter” may have their normal meanings as understood in the optical arts.
“Cuvette”, “cartridge”, and “disposable cartridge” may generally refer to an element into which a sample of biological fluid may be entered for the purpose of diagnostic analysis. The element may include a plurality of features including but not limited to pre-analytical treatments, direction-specific flow of sample and optical grating components. A “cartridge” generally is used once and for a single sample derived from blood. A cartridge may be realized as a plurality of cartridges. A cartridge may be made of plastic or any relevant material and may be supplied with a plurality of chemicals in either wet or dry form.
“Flow cytometer” may have its generally understood meaning from the diagnostic arts. A flow cytometer for the present invention may be of “tabletop” size to allow for point-of-care (POC) applications. Additionally, a flow cytometer as per the instant invention generally will have all sample manipulations and flow occur in an associated disposable cartridge and not in the cytometer itself.
“Illness curve” may relate to a chart, plot or the like that shows levels of biological markers or white blood status as a feature of time. As any diagnostic measurement yields information related to the specific health state of a patient at the time when said measurement was made, a medical practitioner may take vital information about the health status of a patient. By taking a plurality of tests over a predetermined period of time, a medical practitioner could compare results to a predetermined illness curve to know in which direction a patient's health is heading. Illness curves are generally defined testing an individual with a known condition over an extended period of time (measured in hours or days) so as to define levels of biological markers over that period of time. These levels will define the illness curve for later use by a physician or the like to determine the time position of a patient with respect to a developing condition.
A “reader unit” or “detector” is an element or unit that may receive and/or process data in the present invention. A reader unit may include a computer and may have additional functionalities including but not limited to data analysis and presentation to a user.
Without being bound by any particular theory, the following discussion is offered to facilitate understanding of the invention. Flow-cytometry is a well-known methodology used throughout the world for analysis of blood and other samples. One of the greatest challenges today is to identify multiple independent, relevant targets to further understand the health condition of a patient. While some illnesses (Streptococcus infection in the throat) may often be diagnosed by a single test, many complex medical conditions may only be accurately defined by the detection, analysis, and study of a plurality of biological markers. As such, a flow-cytometer must for example be capable of defining a plurality of features of white blood cells in order to give valuable information of a potential state of sepsis for a patient. Additionally, a plurality of measurements over a period of time may be required to monitor said features so as to better define where a patient is on an illness curve.
CD64 is a high-affinity and restricted isotype-specificity FcγRI receptor expressed on macrophages, monocytes, neutrophils and eosinophils.
CD163 is a monocyte/macrophage-associated antigen, which has recently be identified as a haemoglobin scavenger receptor.
In the various embodiments disclosed herein, like elements have like reference numerals differing by multiples of 100.
Reference is now made to
Attention is turned to
Reference is now made to
System 100 comprises the disposable cartridge, which may be disposed on an x-y-z stage 140 or, as shown in
Disposable cartridge 150 is adapted to receive a bodily fluid, such as, but not limited to, blood, urine, serum or plasma. The disposable cartridge is constructed and configured to have several different sections 152, 154, 156 and 158. Section 152 is a body fluid aspiration section, which is adapted to receive the body fluid directly or indirectly from the patient (or animal) and this section acts as a reservoir of the body fluid.
Disposable cartridge 150 comprises fluid conveying means between the sections, such as, but not limited to, air pressure, liquid pressure, mechanical means and combinations thereof. Body fluid aspiration section 152 is adapted to convey a predetermined quantity of the body fluid (a body fluid sample 151) to a pre-analytical sample processing section 154.
In pre-analytical sample processing section 154, at least one preparatory step is performed on the body fluid such as, but not limited to:
a) incubation with at least one antibody;
b) incubation with at least one antigen;
c) staining of at least one cell type in the body fluid;
d) enzymatic lysing of at least one cell type of the body fluid;
e) osmotic lysing of at least one cell type of the body fluid;
f) heat or cool at least part of the bodily fluid;
g) addition of reference material to the bodily fluid; and
h) chemical reaction with at least one element of the body fluid.
The pre-treated sample of bodily fluid is then conveyed from pre-analytical sample processing section 154 to a sample excitation/interaction zone or section 156. This pre-treated sample may be conveyed continuously or in a batch mode to sample excitation/interaction section 156.
Sample excitation/interaction section 156 may be disposed or brought into position by the x-y-z stage 140 or, as shown in
Cartridge 150 is constructed out of a plastic material. Sample excitation/interaction section 156 comprises a thin metallic lining layer 157 (not shown) of around 0.1-2 microns. The metal may be aluminum, gold, silver, nickel, copper or any other suitable conductive metal or alloy. The thin metallic lining layer is constructed and configured to prevent the excitation illumination from entering the plastic material of construction of the cartridge.
Multi-spectral emission detector 134 receives the emission from the pre-treated sample and is adapted to sample the spectral emission in spectral bands. In some cases these bands are non-overlapping bands. Multi-spectral emission detector 134 is adapted to pass data representing the spectral bands to multi-spectral fluorescence signal processor 136.
Multi-spectral fluorescence signal processor 136 may comprise two or more sub-elements (not shown) including:
a) a photon counter 131, as part of the optics unit 130;
b) a software element 111 (in computer 110) for analyzing the photon counter output; and
c) other detecting elements (not shown) for measuring other optical outputs of multi-spectral emission detector 134.
The cartridge further comprises a spent sample disposal section 158, adapted to receive a sample from the sample excitation/interaction section.
The system further comprises computer 110, the computer is adapted to receive data related to the plurality of spectrally distinct signals and a processor, adapted to process said data and to output at least one output related to said medical condition. One type of output provided is a visual output which is outputted onto a screen 112 of the computer.
According to some embodiments of the present invention, system 100 is designed to be portable. In some cases, the system, including computer 110, is contained in a portable container (not shown), such as a box or case having dimensions of less than 50×30×15 cm. According to some embodiments, the dimensions of the system are 40×25×10 cm, while the disposable cartridge dimensions are 8.5×5.4×0.6 cm. The system typically weighs less than 15 kg. According to some embodiments, it weighs less than 10 kg.
Reference is now made to
As processing times may be twenty minutes or longer, the effective testing rate of a prior art cytometer is three samples per hour. In the instant invention, numerous samples may be prepared (pre-analytical treatment) and then sequentially exposed to light from the optics unit 230 to record fluorescent signals. According to some embodiments, 4-50 samples can be processed in one hour. According to some further embodiments, up to one hundred samples can be analyzed in one hour. According to some further embodiments, up to five hundred samples can be analyzed in one hour.
Reference is now made to
Reference is now made to
With respect to
Reference is now made to
A laser 480 or other appropriate light source provides a light beam 484, which may be directed towards a plurality of optical elements, including a dichroic filter 472, a beam splitter 468, a focusing lens 466, a pinhole 464 and a silicon reader unit 462, for recording a signal from a beam 442 directed through the objective 438 towards a sample and returned to the optical unit. Additional optical elements may include an optional attenuator, a high-pass filter 470, a focusing lens 466, a slit 478, a concave grating 482, and a PMT array 476. This arrangement of elements, representing an embodiment of the present invention, allows for generation of excitation light, focusing it on a sample, collecting reflected and emitted light signal resulting from the interaction of the excitation light and fluorophores in the sample and recording said returned light so as to determine fluorescence of sample in response to light illumination from laser 440.
With respect to
Reference is now made to
Reference is now made to
Turning to
Table 1 shows representative values for representative components for use in the present invention.
While much of the previous discussion has focussed on the optical elements of some embodiments of the present invention, one of the key components of the diagnostic system herewith presented is a disposable sample cartridge.
Reference is now made to
The capillary region 653 is designed to allow flow of particles in a single-file past the light beam 642. Such an arrangement allows both for counting the number of particles as well as individual interrogation of particles to determine the presence of biological markers (via their associated fluorescent tags) on each particle. Such a physical arrangement allows for detection of one or more biological markers (independent of particle-specific properties such as size, shape, and number) on each particle.
Finally, there is a collection component 654 which receives sample after exposure to light beam 642. This is a waste region and allows for a completely self-contained disposable for sample preparation, analysis and waste collection. It is noted that the disposable cartridge may be of any relevant shape and is shown as it is in
As mentioned above, the sample, after pre-analytical treatment to allow for binding of fluorescent tag to cells/particles, must flow under a light beam 642, produced by an optical unit (not shown). The flow is generally “single file” so as to allow for accurate determination of cell-specific markers on each analyzed cell. Methods to induce flow include but are not limited to electrical stimulation, chemical induction, and vacuum pull. In an electrical stimulation system, charge is applied across the capillary region 653 so as to induce charged particles to move from the pre-analytical component 652 towards the collection component 654. The charge could be supplied by the cytometer in which the disposable cartridge 650 is placed or from an external source.
Alternatively, the capillary region may include chemical features (hydrophilic/hydrophobic; positive/negative charge) to encourage sample to move from left to right as shown in
As described herein, the optics and sample handling have been handled separately. Such an arrangement is not mandatory, as some of the optical features needed for proper sample analysis may be included in a disposable cartridge.
Reference is now made to
Reference is now made to
A molecular marker 895 on a particle 890 may be illuminated by light 842 and its fluorescence will be captured by a proximate photomultiplier tube 899. The photomultiplier tube 899 may distinguish the wavelength of the fluorescence and thus which biological marker 895 is present on particle 890. Thus, the systems of the present invention may determine which biological markers are present on particles 890, which are detected in the systems of the present invention. A photomultiplier tube 899 may have a plurality of tubes or an array of elements for fine wavelength discrimination and alternatively may be replaced with film, CCD or other appropriate light-receiving reader unit. It should be understood that
The systems of the present invention comprise controller software which are adapted to run a diagnostic process. It is understood that the controller software may be an integral part of the flow-cytometer or alternatively be installed on an associated computing device (see
Reference is now made to
In one embodiment, screen shot 900, is divided into three regions. The top left region 905 includes controls for running/stopping/calibrating the system or flow cytometer (100,
Reference is now made to
In a body fluid provision step 1002, a body fluid, such as blood, urine, serum or plasma is provided from a human or animal patient. Typically, the sample is fresh, but may also be a stored, refrigerated or frozen-thawed sample. The fluid is typically liquid and at a temperature of 4-37° C.
In a body fluid introduction step 1004, part or all of the body fluid sample 151 (
In a reacting step 1006, the fluid sample is reacted with at least one reactant in the cartridge forming a treated sample. According to some embodiments, this step is performed in pre-analytical sample processing section 154 (
In an impinging step 1008, radiation is impinged on the treated sample, such as, but not limited to, in sample excitation/interaction section 156, thereby generating a plurality of spectrally distinct signals in the direction of optics unit 130 (
In a spectral emissions detection step 1010, a plurality of spectrally distinct signals is detected by multiple emission detector 134 (
Thereafter, in a data processing step 1012, the outputted data is processed by signal processor 136 and/or by computer 110 to provide an output indicative of a medical condition.
Turning to
The systems of the present invention, as described and shown herein provide uses, such as, but not limited to, at least one of the four following scenarios:
a) When multiple pieces of information, such as biological markers and white cell state are required in order to make an accurate diagnostic determination;
b) When multiple sequential measurements must be made in order to determine the position of a patient on an illness curve;
c) When white cell and similar data are needed quickly and in a POC environment; and
d) When fluorescent signals overlap in wavelength and there is need to determine relative contribution of each signal for a given wavelength range.
The instant invention includes software and algorithms for proper data analysis and conversion of raw fluorescence data into actual concentrations of relative biological markers.
Other suitable operations or sets of operations may be used in accordance with some embodiments. Some operations or sets of operations may be repeated, for example, substantially continuously, for a pre-defined number of iterations, or until one or more conditions are met. In some embodiments, some operations may be performed in parallel, in sequence, or in other suitable orders of execution.
Discussions herein utilizing terms such as, for example, “processing,” “computing,” “calculating,” “determining,” “establishing”, “analyzing”, “checking”, or the like, may refer to operation(s) and/or process(es) of a computer, a computing platform, a computing system, or other electronic computing device, that manipulate and/or transform data represented as physical (e.g., electronic) quantities within the computer's registers and/or memories into other data similarly represented as physical quantities within the computer's registers and/or memories or other information storage medium that may store instructions to perform operations and/or processes.
Some embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment including both hardware and software elements. Some embodiments may be implemented in software, which includes but is not limited to firmware, resident software, microcode, or the like.
Some embodiments may utilize client/server architecture, publisher/subscriber architecture, fully centralized architecture, partially centralized architecture, fully distributed architecture, partially distributed architecture, scalable Peer to Peer (P2P) architecture, or other suitable architectures or combinations thereof.
Some embodiments may take the form of a computer program product accessible from a computer-usable or computer-readable medium providing program code for use by or in connection with a computer or any instruction execution system. For example, a computer-usable or computer-readable medium may be or may include any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
In some embodiments, the medium may be or may include an electronic, magnetic, optical, electromagnetic, InfraRed (IR), or semiconductor system (or apparatus or device) or a propagation medium. Some demonstrative examples of a computer-readable medium may include a semiconductor or solid state memory, magnetic tape, a removable computer diskette, a Random Access Memory (RAM), a Read-Only Memory (ROM), a rigid magnetic disk, an optical disk, or the like. Some demonstrative examples of optical disks include Compact Disk-Read-Only Memory (CD-ROM), Compact Disk-Read/Write (CD-R/W), DVD, or the like.
In some embodiments, a data processing system suitable for storing and/or executing program code may include at least one processor coupled directly or indirectly to memory elements, for example, through a system bus. The memory elements may include, for example, local memory employed during actual execution of the program code, bulk storage, and cache memories which may provide temporary storage of at least some program code in order to reduce the number of times code must be retrieved from bulk storage during execution.
In some embodiments, input/output or I/O devices (including but not limited to keyboards, displays, pointing devices, etc.) may be coupled to the system either directly or through intervening I/O controllers. In some embodiments, network adapters may be to coupled to the system to enable the data processing system to become coupled to other data processing systems or remote printers or storage devices, for example, through intervening private or public networks. In some embodiments, modems, cable modems and Ethernet cards are demonstrative examples of types of network adapters. Other suitable components may be used.
Some embodiments may be implemented by software, by hardware, or by any combination of software and/or hardware as may be suitable for specific applications or in accordance with specific design requirements. Some embodiments may include units and/or sub-units, which may be separate of each other or combined together, in whole or in part, and may be implemented using specific, multi-purpose or general processors or controllers. Some embodiments may include buffers, registers, stacks, storage units and/or memory units, for temporary or long-term storage of data or in order to facilitate the operation of particular implementations.
Some embodiments may be implemented, for example, using a machine-readable medium or article which may store an instruction or a set of instructions that, if executed by a machine, cause the machine to perform a method and/or operations described herein. Such machine may include, for example, any suitable processing platform, computing platform, computing device, processing device, electronic device, electronic system, computing system, processing system, computer, processor, or the like, and may be implemented using any suitable combination of hardware and/or software. The machine-readable medium or article may include, for example, any suitable type of memory unit, memory device, memory article, memory medium, storage device, storage article, storage medium and/or storage unit; for example, memory, removable or non-removable media, erasable or non-erasable media, writeable or re-writeable media, digital or analog media, hard disk drive, floppy disk, Compact Disk Read Only Memory (CD-ROM), Compact Disk Recordable (CD-R), Compact Disk Re-Writeable (CD-RW), optical disk, magnetic media, various types of Digital Versatile Disks (DVDs), a tape, a cassette, or the like. The instructions may include any suitable type of code, for example, source code, compiled code, interpreted code, executable code, static code, dynamic code, or the like, and may be implemented using any suitable high-level, low-level, object-oriented, visual, compiled and/or interpreted programming language, e.g., C, C++, Java, BASIC, Pascal, Fortran, Cobol, assembly language, machine code, or the like.
Functions, operations, components and/or features described herein with reference to one or more embodiments, may be combined with, or may be utilized in combination with, one or more other functions, operations, components and/or features described herein with reference to one or more other embodiments, or vice versa.
Any combination of one or more computer usable or computer readable medium(s) may be utilized. The computer-usable or computer-readable medium may be, for example but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CDROM), an optical storage device, a transmission media such as those supporting the Internet or an intranet, or a magnetic storage device. Note that the computer-usable or computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory. In the context of this document, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-usable medium may include a propagated data signal with the computer-usable program code embodied therewith, either in baseband or as part of a carrier wave. The computer usable program code may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc.
Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the “C” programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
The present invention is described herein with reference to flow chart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each block of the flow chart illustrations and/or block diagrams, and combinations of blocks in the flow chart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable medium produce an article of manufacture including instruction means which implement the function/act specified in the flow charts and/or block diagram block or blocks.
The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flow charts and/or block diagram block or blocks.
The flow charts and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flow charts or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flow chart illustrations, and combinations of blocks in the block diagrams and/or flow chart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Although the embodiments described above mainly address assessing test coverage of software code that subsequently executes on a suitable processor, the methods and systems described herein can also be used for assessing test coverage of firmware code. The firmware code may be written in any suitable language, such as in C. In the context of the present patent application and in the claims, such code is also regarded as a sort of software code.
It will be appreciated by persons skilled in the art that the present invention is not limited to what has been particularly shown and described hereinabove. Rather, the scope of the present invention is defined by the appended claims and includes both combinations and sub-combinations of the various features described hereinabove as well as variations and modifications thereof which would occur to persons skilled in the art upon reading the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications and variations that fall within the scope of the appended claims and all such claims that fall within the spirit of the invention.
The references cited herein teach many principles that are applicable to the present invention. Therefore the full contents of these publications are incorporated by reference herein where appropriate for teachings of additional or alternative details, features and/or technical background.
It is to be understood that the invention is not limited in its application to the details set forth in the description contained herein or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Those skilled in the art will readily appreciate that various modifications and changes can be applied to the embodiments of the invention as hereinbefore described without departing from its scope, defined in and by the appended claims.
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/IL11/00296 | 4/11/2011 | WO | 00 | 12/17/2012 |
| Number | Date | Country | |
|---|---|---|---|
| 61324315 | Apr 2010 | US |
