36 results about "Fetal abnormality" patented technology

The present invention relates to methods for detecting, enriching, and analyzing rare cells that are present in the blood, e.g. fetal cells. The invention further features methods of analyzing rare cell(s) to determine the presence of an abnormality, disease or condition in a subject, e.g. a fetus by analyzing a cellular sample from the subject.

The present invention provides systems, apparatuses, and methods to detect the presence of fetal cells when mixed with a population of maternal cells in a sample and to test fetal abnormalities, e.g. aneuploidy. The present invention involves labeling regions of genomic DNA in each cell in said mixed sample with different labels wherein each label is specific to each cell and quantifying the labeled regions of genomic DNA from each cell in the mixed sample. More particularly the invention involves quantifying labeled DNA polymorphisms from each cell in the mixed sample.

The present invention recognizes that diagnosis and prognosis of many conditions can depend on the enrichment of rare cells from a complex fluid sample. In particular, the enrichment of fetal cells from maternal samples, such as maternal blood samples, can greatly aid in the detection of fetal abnormalities or a variety of genetic conditions. In addition, the present invention recognizes that the enrichment of rare malignant cells from patient samples, can aid in diagnosis, prognosis, and development of therapeutic modalities for patients. The invention includes microfabricated filters for filtering fluid samples and methods of enriching rare cells of fluid samples using microfabricated filters of the present invention. The invention also includes solutions for the selective sedimentation of red blood cells (RBCs) from a blood sample and methods of using selective RBC sedimentation solutions for enriching rare cells of a fluid sample. Yet another aspect of the invention is an automated system for processing a fluid sample that includes: at least one filtration chamber that includes a microfabricated filter; automated means for directing fluid flow through at least one filtration chamber of the automated system, and means for collecting enriched rare cells. The present invention also includes methods of using automated systems for separating rare cells from fluid samples. Preferred fluid samples are blood, effusion, or urine samples, and rare cells that can be enriched from such sample include nucleated red blood cells and cancer cells.

The present invention recognizes that diagnosis and prognosis of many conditions can depend on the enrichment of rare cells from a complex fluid sample. In particular, the enrichment of fetal cells from maternal samples, such as maternal blood samples, can greatly aid in the detection of fetal abnormalities or a variety of genetic conditions. In addition, the present invention recognizes that the enrichment of rare malignant cells from patient samples, can aid in diagnosis, prognosis, and development of therapeutic modalities for patients.

A first aspect of the present invention is a microfabricated filter for filtering a fluid sample. A microfabricated filter of the present invention comprises at least one tapered pore, and preferably comprises at least two tapered pores whose variation in size is 20% or less. The present invention also includes a method of enriching rare cells of a fluid sample using a microfabricated filter of the present invention.

Another aspect of the invention is solutions for the selective sedimentation of red blood cells (RBCs) from a blood sample comprising a red blood cell aggregating agent and at least one specific binding member that selectively binds RBCs. Solutions of the present invention include a combined solution for rare cell enrichment that comprise RBC aggregating agents, at least one specific binding member that selectively binds RBCs, and at least one additional specific binding member for the removal of undesirable sample components other than RBCs. The invention also includes methods of using selective RBC sedimentation solutions and combined solutions for enriching rare cells of a fluid sample.

Yet another aspect of the invention is an automated system for processing a fluid sample that includes: at least one filtration chamber that comprises or engages one or more microfabricated filters of the present invention; automated means for directing fluid flow through the one or more filtration chambers of the automated system, and means for collecting enriched rare cells. The present invention also includes methods of using an automated system for separating rare cells from a fluid sample. Preferred fluid samples are effusion, blood, or urine samples, and rare cells that can be enriched from such sample include nucleated red blood cells and cancer cells.

Methods and kits for selectively enriching non-random polynucleotide sequences are provided. Methods and kits for generating libraries of sequences are provided. Methods of using selectively enriched non-random polynucleotide sequences for detection of fetal aneuploidy are provided.

The present invention relates to business methods in which screening services and diagnostics for the condition of a fetus are provided. Fetal abnormalities, include chromosomal and other genetic ies, are detected through the analysis of fetal cells obtained from maternal blood samples.

The invention relates to a method of identifying fetal abnormality from a maternal blood sample by capturing an image of a fetal nucleated red blood cell obtained from the maternal blood sample; inputting probe intensities for a plurality of nucleic acid probes that bind fetal nucleic acids of interest; analyzing the probe intensities; and generating a diagnostic output according to results of the analysis. In some embodiments, the probes are specific to a chromosome.

Described are non-invasive methods of detecting in vivo cell death by measuring levels of ubiquitous and tissue specific miRNA. The method can be applied for detection of pathologies caused or accompanied by cell death, as well as for diagnosis of infectious disease, cytotoxic effects induced by different chemical or physical factors, and the presence of specific fetal abnormalities.

A method of identifying embryonic or fetal red blood cells in a sample containing maternal blood cells and embryonic or fetal red blood cells or both, the method comprising determining, which cell or cells contain or express an adult liver component. A method of isolating embryonic or fetal red blood cells from a sample containing maternal blood cells and embryonic or fetal red blood cells or both, the method comprising isolating the cells which contain or express an adult liver component. A method of determining a fetal abnormality the method comprising identifying or isolating embryonic or fetal cells according to the above methods and analysing said embryonic or early fetal cells for said abnormality. Use of a means for determining whether a cell contains or expresses an adult liver component for identifying or isolating an embryonic or fetal red blood cell.

A method and system for assessing fetal abnormality based on landmarks. According to one embodiment, at least two coordinates are received for each of a plurality of points identifying a configuration of landmarks in a fetal image, and any of the received coordinates of any of the plurality of points are utilized as markers to assess fetal abnormality. According to another embodiment, at least two coordinates are received for each of a plurality of points identifying a configuration of landmarks in a fetal image, and one or more values resulting from a linear combination of any of the received coordinates of any of the plurality of points are utilized as markers to assess fetal abnormality.

The present invention relates to a method for screening maternal urine samples for changes in the pattern of mass spectral fingerprinting which have been found to be characteristic of fetal aneuploidies such as Down's Syndrome and have application for the screening of other fetal abnormalities and disorders of pregnancy including gestational trophoblastic diseases.

A method and system for utilizing shape analysis to assess fetal abnormality. According to one embodiment, coordinates of points identifying a shape in a fetal image are received, coefficients of one or more mathematical functions that describe the identified shape are determined, and the determined coefficients are utilized as markers to assess fetal abnormality.

A method of assessing a pregnant woman's risk of having a fetus with a fetal abnormality by determining the fetus' BPD/OFD ratio and using the BPD/OFD ratio in conjunction with one or more other screening markers for the fetal abnormality. Also provided is a method of determining whether a pregnant woman is screen-positive or screen-negative by comparing the BPD/OFD ratio of the pregnant woman's fetus to a risk cut-off level.

The invention discloses methods and apparatuses for the detection and diagnostics of genetic alterations/mutations in a target sample, which may be a solid tissue or a bodily fluid. A reference sample is also acquired, and the target and reference samples are replicated into multiple target and reference replicates. The replicates are sequenced, and the sequence data is analyzed based on a statistical test. The statistical test compares the measurements between the target and reference replicates at respective allelic indices. True positive calls are then made based on the results of the statistical testing, and the desired genetic alterations/mutations are identified at the base-pair level. The invention may be used for diagnostics related to cancer, auto-immune disease, organ transplant rejection, genetic fetal abnormalities and pathogens.

Disclosed are methods for non-invasive fetal genetic analysis involving enrichment of trophoblast cells in a maternal cervical sample, followed by isolation and genetic analysis of the isolated trophoblasts.

The invention relates to a portable fetal monitor. The portable fetal monitor comprises a rotary display screen and a host rotationally connected with the rotary display screen. A sliding touch screen and an operation panel are arranged on the upper end face of the host, a control system is further arranged in the host, the side face of the host is connected with a fetal heart rate detection probe, a uterine pressure detection probe, a fetal movement detection probe and an electronic sphygmomanometer arm band which are independent, and the fetal heart rate detection probe, the uterine pressure detection probe, the fetal movement detection probe and the electronic sphygmomanometer arm band are all in signal connection with the control system. The portable fetal monitor can be carried portably, is conveniently used by a pregnant woman on any occasion, and is convenient to use, the pregnant woman does not need to regularly go to a hospital for examinations, the fetus condition and the condition of the pregnant woman can be detected by the pregnant woman herself, data can be exported by the monitor itself, the data is printed or directly transmitted to a doctor, the travel trouble of the pregnant woman is reduced, the diagnosis time of the pregnant woman is shortened, detection can be carried out at any time, the pregnant woman can communicate with the doctor, and the problem of fetal abnormalities is solved in time.