44 results about "Liquid-based cytology" patented technology

Sample vials and methods of processing the sample vials are provided. The sample vial comprises a vial container, a sample collection chamber within the vial container, a vial cap configured to be mated with the vial container to enclose the collection chamber, an aliquot chamber, which may be carried by the vial cap or the vial container, and a valve mechanism for selectively sealing and unsealing the aliquot chamber from the collection chamber. The method may comprise flowing an aliquot of the sample from the collection chamber while the sample within the collection chamber is isolated from an environment exterior to the vial, sealing the aliquot chamber from the collection chamber to isolate the aliquot sample from the remaining sample portion, and transferring at least some of the remaining sample portion from the collection chamber to a microscope slide while the aliquot chamber is sealed from the collection chamber. The method further comprises reserving the slide for cytological screening of the sample, and reserving the aliquot sample for deoxynucleic acid (DNA) testing.

The invention discloses a simple thin liquid-based cytology examine method applied for the gynecological examination, the cervical cancer general examine and the cervical cancer preceding lesion of selected crowd, the steps including: using the cervical cells brush and the scraper to collect samples, put samples in the liquid-based cell preservation solution, add base liquid cell processing solution, oscillate, centrifugally separate, take and discard the supernatant samples liquid, using adding samples gun to assimilate sediment samples, smear, sheet drying, using 95% ethanol marinate or spray for fixed, washing and dyeing. The invention has simple method, small steps, high positive detection rate, low misdiagnosis rate, low cost, and it can effectively eliminate the red blood cells, mucus and other interference components from the cervical cytology detection specimens, with good sheet-producing result.

The invention relates to a liquid-based cell smear manufacturing and dyeing machine utilizing principles of injection and pipetting, which is characterized by structurally comprising a machine base, a machine body, a worktable, a horizontal slide rail, a moving arm, a horizontal motor moving device, an up-down motor moving device and a microcomputer motion control system, wherein four groups of smear manufacturing and dyeing units and a kit are mounted on the worktable board; and 24 samples can be automatically manufactured into smears and dyed when the machine runs once. The liquid-based cell smear manufacturing and dyeing machine does not need a tedious specific gravity liquid gradient centrifugation step, a micropipe type liquid drawing system of a liquid-based cytology test (LCT) machine, or processes of vacuum negative pressure drawing and positive pressure cell transfer of a microporous filter membrane of a Thinprep cytology test (TCT) machine. Cell samples are drawn, evenly mixed and scattered by using a pipetting injector and sample reagents are transferred by utilizing an accurate quantitative liquid drawing and injecting function of the pipetting injector. Cells in a settling and smear-manufacturing bin are naturally settled on a sticky glass slide by relying on the gravity of the cells and then automatically dyed. The liquid-based cell smear manufacturing and dyeing machine has the advantages that the operation is simple, the cost is relatively low, and high quality liquid-based cytological smears can be rapidly manufactured.

The present invention provides a device and method for determining the adequacy of squamous (ectocervical) cells, columnar (endocervical) cells, neutrophils, and noncellular material in a liquid based cytology specimen. The invention first analyzes a liquid based cytology specimen using light scatter to create a light scatter characteristic representing a predetermined cell. Next the invention determines the presence of squamous (ectocervical) cells versus columnar (endocervical) cells versus neutrophils versus noncellular material using the results of the light scatter. The light scatter characteristic that may be used may be forward light scatter, side light scatter, or both side and forward light scatter.

The invention belongs to the technical field of clinical medical pathology and in particular relates to a p16INK4a immunolabeling color-developing kit for cervical liquid-based cells. The kit comprises a p16INK4a antigen preservation solution, a first antibody, a second antibody, a DAB (Diaminobenzidine) color-developing solution, an endogenous peroxidase blocking agent, confining liquid, a buffering solution, a positive reference substance and a negative reference substance. The kit provided by the invention has strong specificity; an antigen and antibody specific combination type dyeing method is utilized and the defect that the specificity of non-specific Papanicolaou staining and naked-eye appearance judgment of current liquid-based cytology are overcome.

The invention discloses a simple and quick preparation method of a thin-layer liquid-based cytology cell smear. The method is characterized by comprising the following steps: a, preprocessing a specimen; b, adding 5ml of adhesive separation liquid into a common centrifuge tube; c, centrifuging a sample mixture and discharging the precipitation from the centrifuge tube while reserving the supernate for use; d, placing a glass sheet with a written number into a long slot of a natural settling device fixing seat serving as corollary equipment for film making; e, placing a settling tube on the glass sheet; f, uniformly mixing the bottom sample left after the centrifugation of the step c, and adding the mixture into the settling tube; g, standing still and naturally settling for 15-30 minutes; h, rinsing the specimen with a washing liquid; i, fixing in 95% alcohol for 10 minutes, and performing Papanicolaou staining; and H, performing E staining or immunohistochemical staining and reading the film. Through the simple and quick preparation method of the thin-layer liquid-based cytology cell smear disclosed by the invention, the mucus, blood and inflammatory cells in the specimen can be separated by natural precipitation, the film is clear and the diagnosis accuracy is improved.

The invention relates to application of an enzyme-labeling-liquid-based cytology technology to the screening of bladder cancer. In the technology, a cell sample which is tabletted by a liquid-based tabletting method is treated by an acid phosphatase chemical staining method, and a bright red precipitate is formed in cytoplasm of abnormal cells by specific staining to ensure that the abnormal cells have remarkable marks. The invention provides a kit for the detection. The kit mainly comprises an enzyme-labeling-liquid-based cytology staining reagent, enzyme-labeling-liquid-based cytology preserving fluid and settlement buffer solution, and can provide high detection specificity and a good staining effect.

Disclosed are a tumor screening system, which operates separation of cells from a vial containing a solution mixed with the cells and collection of the cells on a slide using an automatic unit, a collection vial for liquid based cytology serving to simultaneously store a solution containing cells and pour the solution from out of tumor screening system, a brush for liquid based cytology of cervix carcinoma, which collects cells from a woman's uterus, and a supporting solution for cytodiagnosis, which preserves the collected cells.

The invention relates to a method for preparing a pulled type cervical smear. The method comprises the following steps: (1) oscillating a specimen through an oscillator; (2) centrifugating a part of the oscillated specimen until the specimen is layered into supernatant liquid and a cell layer; (3) removing the supernatant liquid, sucking the cell layer, dripping the cell layer on a glass slide, laminating the glass slide with another glass slide, and then pulling the glass slides to the opposite directions; (4) fixing and dyeing so as to prepare the smear. Compared with a conventional Pap smear method, the method provided by the invention has the advantages of high specimen satisfaction, high smear quality and the like. Compared with a liquid base cytology method, the method provided by the invention has the advantages of simplicity in operation, uniform tiling of the prepared smears, non-overlapping of cells, clear background, no precious equipment, low cost and the like, and is convenient to popularize. Compared with a human papillomavirus-deoxyribose nucleic acid (HPV-DNA) detection method, the method provided by the invention has the advantages of no use of precious equipment, low inspection cost, simplicity in operation, convenience in popularization and the like.

The invention belongs to the technical field of clinical medicine pathology and particularly relates to an immune p16<INK4a> antigen preserving liquid used for thin prep liquid-based cytology test and a preparation method of same. The antigen preserving liquid includes: 60-100 mmol/L of NaCl, 2-10 mmol/L of KCl, 1-5 mmol/L of EDTA disodium, 30-50 mmol/L of urea, 1-5 mmol/L of sodium citrate, 5-20 mmol/L of sucrose, 4-10 mmol/L of PEG-400, 2-3% of paraformaldehyde, 2-10 mmol/L of glycerol and 10-20 mmol/L of dithiothreitol. The preserving liquid is not only suitable for traditional slide preparation and staining of liquid-based cells, but also is suitable for cervical liquid-based cell p16<INK4a> protein immuno-labeling and staining, thus avoiding defects in conventional non-specific Papanicolaou staining.

The invention discloses a semi-automatic method for producing pleural and ascites liquid-based cytology. After the sample is collected, it is placed in a preservation solution bottle, and the preservation solution bottle is placed on a vibrator, and then passed through a centrifuge tube with a sharp bottom in a centrifuge. Add the cell dispersion liquid into the sampler, absorb and discard the supernatant in the test tube, remove the remaining liquid, and place the centrifuged sample on the sample delivery device of the film maker, and each sample passes through the spectrometer in turn, and the sample is aspirated The sample is placed on the corresponding slide in the transfer module, and the dried slide can be used for Papanicolaou staining or HE staining for cytological diagnosis, and Feulgen special staining for DNA quantitative analysis. The present invention is mainly used to improve and solve the problems existing in the non-cervical cell extraction, including the small number of cells, the overlapping of cells, the long production time, the background impurities of the produced films, and the low degree of automation. The quality of slides is improved, the number and distribution of cells on slides are more uniform, easy to use, and has the value of popularization and application.

The invention discloses a reagent kit for screening early-stage cervical cancers based on cervical liquid-based cytology and DNA methylation. The reagent kit comprises orange-G6, brilliant green liquid, Bismarck brown liquid, eosin Y liquid, a QlAamp DNA Mini Kit reagent kit body, a QIAamp EpiTect Bisulfite Kits reagent kit body and PCR reaction liquid, the forward primer sequence of JAM3-M4 is shown as SEQ ID No.6, the reverse primer sequence of JAM3-M4 is shown as SEQ ID No.7, the forward primer sequence of beta-actin is shown as SEQ ID No.16, the reverse primer sequence of beta-actin is shown as SEQ ID No.17. According to the reagent kit for screening the early-stage cervical cancers, detection flexibility, specificity, the positive predictive value and the negative predictive value meet the requirements of clinical diagnosis through primary verification of clinical tissue samples and further verification of a large amount of cervical exfoliated cytology.

A method of determining the presence or absence of a target nucleic acid in a cell sample, said method comprising: a) contacting a surface comprising anion exchange moieties with the sample under conditions suitable to induce binding between the cells and said surface; b) separating the surface with the bound cells from the remaining sample to collect the cells; c) releasing nucleic acids from the cells and d) generating a hybrid between the target nucleic acid and a probe specific for the target nucleic acid e) detecting the presence or absence of the hybrid. The present invention is provides a rapid and automatable method, wherein cells, such as epithelial cells originating from cervical swab samples, are collected from the surrounding liquid medium, such as a liquid based cytology medium, by binding them to an anion exchange surface. The cells bind directly with high affinity and quick kinetics to the anion exchange surface which preferably is provided by magnetic particles carrying anion exchange moieties. The cells that are bound to the anion exchange surface can be easily separated from the surrounding medium and can be directly resuspended in a composition that is suitable for a subsequent hybrid capturing assay which is performed in step d) to detect e. g. pathogen nucleic acids such as HPV nucleic acids.

The invention provides a sample extracting liquid for liquid-based cytology experiments, which comprises sodium azide, potassium chloride, ethanol, ethylene glycol, benzalkonium chloride, sodium dodecyl sulfate, glacial acetic acid, and purified water. According to the extracting liquid, the cost of use is reduced, and impurities such as erythrocyte and mucus masses in a sample can be effectivelydecomposed and removed to obtain effective cells to be tested, and therefore, slide reading backgrounds in liquid-based cytology experiments are clear, and cast-off cells having diagnostic significance are complete in shape, easy to distinguish and uniform, and are paved on a section making region of a glass slide almost without stacking.

A purpose of the invention is to disclose a liquid-based cytology detection method, which comprises: 1, numbering selected bloody and mucus specimens according to centrifugal tubes, wherein a group comprises eight specimens; 2, placing the specimens in the steps 1 into a centrifuge, and carrying out centrifugation for 5 min at 2500 r/min; 3, pouring the upper layer storage clarification liquid obtained after the centrifugation into a corresponding specimen storage bottle, adding 30 ml of 10% glacial acetic acid to downwardly precipitated cell mass, mucus mass and blood cell mass, covering with a lid, placing into a shaker, and carrying out oscillation for 8-10 min; 4, carrying out centrifugation on the oscillated product obtained in the step 3 for 5 min at 2500 r/min, removing the upper layer mixing liquid after the centrifugation, mixing the lower layer cell mass and a corresponding storage liquid, and pouring the obtained mixture into a storage bottle; 5, producing a liquid-based thin-layer cell sheet gynecological specimen from the product obtained in the step 4; and 6, staining the liquid-based thin-layer cell sheet obtained in the step 5, carrying out sealed fixation, and carrying out air drying. The liquid-based cytology detection method of the present invention has advantages of simple, convenient and flexible operation and substantially improved detection accuracy.

The invention discloses a cervical cancer screening method, which comprises the following steps of: taking menstrual blood, and detecting CA15-3(Carbohydrate antigen 15-3, carbohydrate antigen 15-3), CEA (Carcino-embryonic antigen), CA125 (Carbohydrate antigen 125), CYFRA21-1 (cytokeratin 19 fragment, cytokeratin fragment), squamous cell carcinoma associated antigen (SCCA), Her-2 (human epidermal growth factor receptor-2 of protooncogene), TP53 (Tumor protein 53) gene, APC (Adenomatous polyposis coli) gene, HPV DNA gene, and TCT(liquid based cytology) detection in the menstrual blood, and the illness risk of cervical cancer can be prompted. The method has no radiation damage to human bodies, and is short in detection time and low in cost. As the menstrual blood is very convenient and noninvasive to obtain, women can detect once a month, so that the women can know the risk of cervical cancer as soon as possible and take prevention and treatment measures.

The invention discloses space enterococcus faecium LCT (Liquid-based Cytology Test)-EF301, in particular relates to space microorganism and discloses enterococcus probiotics which is obtained by space technology. The space enterococcus faecium LCT-EF301 is characterized in that a gram-positive bacterium is a lactic acid bacteria which is facultative anaerobic, described in details from genomics, transcriptomics and proteomics, free of toxicity. The space enterococcus faecium LCT-EF301 disclosed by the invention can be used for generating bacteriocin for restraining growth of other bacteria, generating acid materials (see figure 1, figure 1a being LCT-EF301 and figure 1b being a control group) such as lactic acid and the like by fermenting carbon sources such as glucose and the like through a high-efficiency glycolysis way, keeping the acid environment of the intestinal tract, restraining the growth of the pathogenic bacteria, adjusting the ecological balance of the intestinal flora of spaceman and producing medicines and health-care products including acidified milk food.

The invention provides a treating fluid for liquid-based cytology experiments. The treating fluid comprises sodium chloride, potassium chloride, dodecyl trimethyl ammonium chloride, ethyl alcohol, glycol, sodium citrate, phosphate buffer and edetic acid. Use cost is reduced, integrity and immobility of cells are protected, cell lysis and expansion are avoided, impurities such as tissue fragments,mucus block masses and red blood cells without diagnostic values in samples are effectively removed, the treating fluid is easy to popularize, and sample preparation time is saved.

Method, composition, kit and system for isolating amplifiable nucleic acid from specimens preserved in a liquid-based cytology preservative that contains formaldehyde. The technique relies on the use of 2-imidazolidone and a protease enzyme, such as proteinase K, at elevated temperatures. Advantageously, RNA can be isolated and used as a template in nucleic acid amplification reactions.