146 results about "Blood gas analysis" patented technology

A gas sampling line having a channel for conducting respiratory gases from a patient respiratory interface to a gas monitor, the gas sampling line comprising, i.a., a gas sampling tube comprised of a polyether block amide material, the polyether segments of which comprise polyethyleneoxide. Use of a tube comprised of a polyether block amide material, the polyether segments of which comprise polyethyleneoxide, for sampling of respiratory gases; and a method for sampling of respiratory gases, the method comprising conducting respiratory gases through such a tube. A gas analysis system for analyzing respiratory gases, comprising a gas sampling line as defined above and a gas monitor connectable to the gas sampling line.

A method and apparatus for identifying one or more target constituents (e.g., white blood cells) within a biological sample is provided. The method includes the steps of: a) adding at least one colorant to the sample; b) disposing the sample into a chamber defined by at least one transparent panel; c) creating at least one image of the sample quiescently residing within the chamber; d) identifying target constituents within the sample image; e) quantitatively analyzing at least some of the identified target constituents within the image relative to one or more predetermined quantitatively determinable features; and f) identifying at least one type of target constituent within the identified target constituents using the quantitatively determinable features.

A method and apparatus for analyzing white blood cells (WBCs) within a whole blood sample quiescently residing within a chamber is provided. The chamber is defined by at least one transparent panel, and the whole blood sample includes at least one colorant operable to differentially identify at least one WBC type from another WBC type within the sample. The method includes the steps of: a) creating at least one image of the sample quiescently residing within the chamber; b) identifying portions of the sample image, with each portion representing a single WBC; c) compressing the sample image portions using a first compression algorithm; and d) one of compressing a remainder of the sample image not included in the portions using a second compression algorithm, or discarding the remainder.

A disposable cassette for blood analysis includes a housing having an upper panel and a sampling section having a filling inlet; at least one pair of chambers in a form of depression of the upper panel of the housing and sealed by a diaphragm; portions of the diaphragm over the chambers being flexible; and one or more channels adapted to interconnect the pair of chambers; one of the chambers containing a predetermined amount of a reagent for blood analysis; and a sample outlet disposed next to and connected to the chamber containing the reagent, the sample outlet including an outlet cavity recessed from the upper panel, a divider disposed therein, and a cover covering the outlet cavity; the sample outlet sealing the reagent to the chamber containing the reagent. Further disclosed is the method of using the disposable cassette for measurements of hematology parameters on a blood analyzer.

A system and method for analyzing a target analyte gas concentration using a photoacoustic spectroscopy cell comprising:i) a modulatable light source which provides optical radiation at an absorption wavelength of a target analyte;ii) a resonant acoustic chamber for containing said analyte;iii) a microphone positioned within said chamber whereby the acoustic reactance of the microphone is a substantial factor in determining the acoustic resonant frequency of the acoustic chamber and where the magnitude of the acoustic reactance of the microphone is at least two times the acoustic resistance of the microphone.

The invention belongs to the technical field of blood cell analysis, and particularly relates to a blood cell analysis chip, analysis meter and analysis method. The blood cell analysis chip disclosed by the invention comprises a white blood cell / hemoglobin analysis chip and a red blood cell / blood platelet analysis chip; the white blood cell / hemoglobin analysis chip performs white blood cell classification by adopting the sheath flow technology and the multi-angle laser polarized light scattering technology, and detects the concentration of hemoglobin by adopting the light absorption method; the red blood cell / blood platelet analysis chip counts the red blood cells and blood platelets respectively by adopting the electrical impedance technology and the floating threshold technology. According to the invention, the blood cell analysis chip is utilized to realize classification of blood cells, has the advantages that the structure is simple, the size is small, the cost is low, the operation is convenient, the easy maintenance and transportation are realized, the chip can be discarded after being used, and the like, satisfies the development requirements of miniaturization, integration and portability of an analysis instrument, and is particularly suitable for field detection, emergency analysis, household application and use of primary care departments.

A method for analyzing a target analyte gas concentration using a photoacoustic spectroscopy cell comprising:i) a modulatable light source which provides optical radiation at an absorption wavelength of a target analyte;ii) a resonant acoustic chamber for containing said analyte;iii) a microphone positioned within said chamber whereby the acoustic reactance of the microphone is substantially equal but opposite in value to the acoustic reactance of the chamber at a selected cell resonance frequency.

Devices for cost-effectively performing in-vitro diagnostic chemical analyses at multiple distributed locations within a medical institution are disclosed. One object of this invention is to provide a network of distributed sensory devices that acquire sensor signals from blood specimens and deliver those signals through a connect on to a central location for analysis by a general-purpose computer and generation of an analysis result. The analysis result is then sent to numerous locations on a network for display, including also possibly back to the location of signal acquisition. Cost-effective mobile sensing devices are also disclosed. The present system includes blood-sensor signal acquisition devices distributed throughout the hospital. The sensory signal-acquisition devices are card readers that acquire raw sensory signals from diagnostic cards inserted therein. These diagnostic cards are smart card-like devices modified for blood collection that contain sensory elements such as electrodes adapted to provide a raw sensory signal. The signal acquisition devices are modified smart card readers, which acquire the raw sensory data from an inserted smart card through a standardized contact arrangement and provide the raw data to data processing devices such as data acquisition cards. The system includes multiple remote ports for acquiring blood sensor signals. One or more card reader, when connected to a mobile general-purpose computer, can be converted into a complete mobile blood analyzer.

The present invention provides a gas analyzer that can be miniaturized and detect a wide variety of gases with high sensitivity, and a method of gas analysis. A separation column 16 is configured so as to pass a sample gas together with a carrier gas through the inside thereof. A surface acoustic wave device 17 has a base material 21 with an annularly continuous annular surface formed of at least apart of a spherical surface; a surface acoustic wave generating means 22 capable of generating a surface acoustic wave that propagates along the annular surface; and a plurality of reaction parts 23 provided along the annular surface so as to change a predetermined physical quantity of the surface acoustic wave in response to the components of the sample gas. The surface acoustic wave device 17 is arranged so that the sample gas passing through the separation column 16 is reacted with the reaction parts 23. The measuring part 18 can measure a physical quantity of the surface acoustic wave propagating along the annular surface, and the components of the sample gas can be analyzed on the basis of the measured physical quantity.

The invention relates to the technical field of gas detection, in particular to an infrared gas detection system suitable for oil-containing gas analysis of a reservoir, which is characterized by comprising a vacuum pump, wherein the vacuum pump is used for dedusting and drying gas desorbed in a drilling process and conveying the desorbed gas into a constant-current stabilizer through a gas pipeline; after the flow of the gas is stabilized by the constant-current stabilizer, the gas enters from an inlet of a detection chamber and is continuously exhausted from an outlet of the detection chamber; the detection chamber comprises a temperature control mechanism used for thermostatically heating and controlling a heating element in the detection chamber so that the detection chamber forms a constant-temperature gas chamber; three infrared light sources, namely a light hydrocarbon gas infrared light source, a heavy hydrocarbon gas infrared light source and a CO2 infrared light source, which have the absorption peak wavelengths of three gases comprising light hydrocarbon gas, heavy hydrocarbon gas and CO2 gas, are arranged on a gas route vertical to the constant-temperature gas chamber; after passing through the gas vertical to the constant-temperature gas chamber, the three infrared light sources are received by three photoelectric receiving tubes in three photoelectric receiving circuits; and after the three infrared light sources are amplified by an amplification processing circuit, absorption light-wave intensities of the three gases, namely the light hydrocarbon gas, the heavy hydrocarbon gas and the CO2 gas, are displayed on a displayer along a time axis. The system has the characteristics of high reliability, convenient operation and low cost.

Methods and apparatus for analyzing gas-oil-water compounds in oilfield and other applications are disclosed using terahertz radiation. A sample analyzer includes a sample chamber having a fluid communication port configured to receive the sample. The analyzer also includes a filter to filter samples and selectively remove oil, water or gas from reservoir mixture received by the sample chamber. A terahertz (THz) radiation detector is provided in electromagnetic communication with the sample. The terahertz detector provides a detected output signal indicative of the terahertz electromagnetic radiation detected from the sample. In some embodiments, the device also includes a terahertz source illuminating the sample, the terahertz detector detecting a portion of the terahertz source illumination as modified by the sample. The detected portion of the spectrum of terahertz radiation can be processed to analyze the composition of the sample.

The embodiment of the invention discloses a blood analysis method and system, and relates to the technical field of medical hydromechanics and medical images. The method comprises the following steps of obtaining a three-dimensional medical image containing blood vessels; building a blood vessel model according to the three-dimensional medical image; performing rasterization on the blood vessel model; setting the boundary region of the blood vessel model; obtaining the prestored blood analysis model and a blood analysis model parameter relevant to the blood analysis model; obtaining the boundary condition of the boundary region; on the basis of the blood vessel model, the blood analysis model, the blood analysis model parameter and the boundary condition, performing calculation to obtain the blood analysis result. The blood analysis method and system provided by the embodiment of the invention have the advantages that the direct evaluation on the blood vessel parameter is realized; meanwhile, the problem of poor user experience due to unfamiliarity to the operation engineering model for direct evaluation on blood vessel parameters by users (doctors) is solved.

A gas specimen mixture analysis system includes at least one sensor for measuring the concentrations of inert components in the gas specimen mixture, a pressure sensor for measuring the pressure of the gas specimen mixture, and a temperature sensor for measuring the temperature of the gas specimen mixture. A subsystem measures the speed of sound in the gas specimen mixture, and a processing subsystem, responsive to the at least one inert component sensor, the pressure sensor, the temperature sensor, and the subsystem for measuring the speed of sound, is configured to generate a number of sample gas mixtures with varying percentages of hydrocarbon gases, each including the measured inert component concentrations. The processing subsystem is also configured to calculate, for each generated sample gas mixture, the speed of sound therein based on the measured pressure and temperature and the particular percentages of hydrocarbon gases therein, and iteratively compare the measured speed of sound with the calculated speed of sound in different sample gas mixtures until convergence for a particular sample gas mixture. The processing subsystem is further configured to calculate the molecular weight of the particular sample gas mixture and set the molecular weight of the gas specimen mixture to the calculated molecular weight.

A system and method for field fluid sampling and analyzing dissolved gases in electrical equipment fluids is described. The system includes a disposable vial which is sealed with a self-sealing stopper. Fluid to be analyzed is inserted into the vial by a hollow needle. Also described is apparatus for evacuating and sealing the vial and apparatus for introducing fluid from electrical equipment into the vial.

The present invention relates to a device for providing a result of urine and feces gas analysis result by analyzing the urine and / or feces gas flowing into a toilet so as to acquire status in formation, and displaying advertisements corresponding to the acquired information. According to the present invention, while a user is performing excretion, the user may obtain information associated with his or her health based upon an analysis of his or her urine and / or feces, and an advertiser may provide consumers with advertisements associated with the user's health.

An apparatus and method of automated blood cell analysis uses technologies from other systems to create a new, robust, improved type of automated microscope, which uses electronic motors and a closed loop control system to minimize ambient factors, such as jarring and temperature changes. Pre-stained blood smear slides are first coated with a thin film of oil and are loaded into a carousel from which they can individually be analyzed. The slides are moved under a low magnification microscope; an optimal area of examination is determined; a focal plane map is calculated for that area, and the positions of white blood cell candidates are computed. The slide is then moved under a high power microscope where a refined focal plane map is computed and the individual white blood cell candidates are imaged. The cells are preclassified and the images are made available for analysis by the technician. Additionally, samples of red blood cells, equivalent to what the technician would do manually, are imaged and presented to the technician for evaluation. The technician may make notes on those cells, both red and white blood cells and archive them.

Physiologic sensors and methods of application are described. These sensors function by detecting recently discovered variations in the spectral optical density at two or more wavelengths of light diffused through the skin. These variations in spectral optical density have been found to consistently and uniquely relate to changes in the availability of oxygen in the skin tissue, relative to the skin tissue's current need for oxygen, which we have termed Physiology Index (PI). Current use of blood gas analysis and pulse oximetry provides physiologic insight only to blood oxygen content and cannot detect the status of energy conversion metabolism at the tissue level. By contrast, the PI signal uniquely portrays when the skin tissue is receiving ‘less than enough oxygen,’‘just the right amount of oxygen,’ or ‘more than enough oxygen’ to enable aerobic energy conversion metabolism. The PI sensor detects one pattern of photonic response to insufficient skin tissue oxygen, or tissue hypoxia, (producing negative PI values) and a directly opposite photonic response to excess tissue oxygen, or tissue hyperoxia, (producing positive PI values), with a neutral zone in between (centered at PI zero). Additionally, unique patterns of PI signal response have been observed relative to the level of physical exertion, typically with a secondary positive-going response trend in the PI values that appears to correspond with increasing fatigue. The PI sensor illuminates the skin with alternating pulses of selected wavelengths of red and infrared LED light, then detects the respective amount of light that has diffused through the skin to an aperture located a lateral distance from the light source aperture. Additional structural features include means of internally excluding light from directly traveling from the light emitters to the photodetector within the sensor. This physiology sensor and methods of use offer continuous, previously unavailable information relating to tissue-level energy conversion metabolism. Several alternative embodiments are described, including those that would be useful in medical care, athletics, and personal health maintenance applications.

The invention relates to a laser system for blood cell analysis, flow cell analysis and body fluid analysis, which comprises a first laser source, a second laser source, a first condensation device, a second condensation device and a front receiving device and a lateral receiving device, wherein the first laser source transmits laser with first wavelength; the second laser source transmits laser with second wavelength; the first condensation device makes the laser transmitted by the first laser source condense and enter a sample room; the second condensation device makes the laser transmitted by the second laser source condense and enter the sample room; and the front receiving device and the lateral receiving device are used for collecting emergent light signals of the sample room. The laser system can reduce the interference of cell membranes on cell nucleus scattering in the process of detecting a cell sample, acquire more information of a detected object, reduce error detection and omission detection of the detected objects, and improve the detection accuracy of a detector.

There is provided a sample preconcentrator. The sample preconcentrator in which a sample gas injection port is coupled to a dried gas supply source and a gas analysis system to concentrate a sample gas comprises a sample concentrating unit containing an absorbent that is composed of carbon nanotube-metal nanocomplexes; a conduit switching valve for selectively coupling the sample gas injection port to the dried gas supply source and the gas analysis system and controlling the absorption and desorption of the sample gas from the sample concentrating unit; and a plurality of conduits for connecting the sample gas injection port, the dried gas supply source, the gas analysis system, the sample concentrating unit and the conduit switching valve.

An analytical test element for blood analyses is provided having an application site and a microfluidic channel structure in fluid communication with the application site. The channel structure includes at least first and second analytical channels for receiving first and second portions of a blood sample applied to the application site. The first analytical channel includes a first analytical site to determine the total haemoglobin value (Hb) of the blood sample. The second analytical channel includes a second analytical site to determine a glycohaemoglobin value (HbA1c) of the blood sample.

A light source system and method that generates stable optical power over time and temperature for use in laser scanning, turbidity sensing, airborne-particle analysis, fog and visibility monitoring, blood-gas analysis and applications where light source output intensity changes less than one-half percent over a 50° C. range. The system includes a miniature semiconductor light emitter that can be powered by two AAA alkaline batteries for more than 100 hours and is about 1 cm3 in size (TO-5 package). A semiconductor light emitter emits a beam of linearly polarized light through a coated optical element having first and second surfaces that meet at an acute angle, the first surface reflecting a portion of the light to a control system and transmitting the rest through the second surface in a direction normal to it and thereby enabling immunity to light interference in the reflected and transmitted beams and novel, error-canceling properties.

The invention discloses a production method of quality control products of a blood gas analyzer, which comprises the following steps of: preparing a quality control liquid which includes an HEPES buffer solution with concentration of 30 to 50mmol / L; preparing an equilibrium gas which is a mixed gas of CO2, O2 and nitrogen gas; connecting the prepared quality control liquid and equilibrium gas into the corresponding pipelines respectively, meanwhile filling the liquid and gas into an ampoule bottle; and drawing out the pipelines from the ampoule after the volume of quality control liquid filled into the ampoule bottle reach the required level, meanwhile using high temperature flames to seal the bottle. The method is to fill the mixed gas of O2, CO2 and N2 by a predetermined ratio to the ampoule bottle, add the prepared quality control liquid while filling gas, and seal the bottle in the meanwhile. Therefore, the produced quality control substances will not change the predicted gas concentration level due to bottle sealing to a great extent, so the quality of the produced quality control products is reliable.

The invention discloses a blood analyzing device (100) comprising a holder (110) arranged for carrying a container (10) having a cuvette (20) containing a blood sample (30). The container (10) is positioned in the holder (110) so that a longitudinal axis (60) of the cuvette (20) is angled relative a horizontal axis (70). A light source (120) provides light (40) into the sample (30) and a detector (130) detects the output light (50) from a sub-portion of the blood sample (30). Kinetic information indicative of the change in hemoglobin concentration in a measuring volume (32, 34) is determined by a Hb processor (145) from the detected output light (50). An ESR processor (140) determines the erythrocyte sedimentation rate of the sample (30) based on the kinetic information.

The invention discloses a visualized explosive cooking-off and gas product analysis device. The problem of thermal safety research of 1 kilogram of explosive under semi restriction condition at present is solved, and whole-process visualized observation and recording of testing phenomena and real-time qualitative analysis of cooking-off process gas products are achieved. The visualized explosive cooking-off and gas product analysis device mainly consists of three parts including a high-definition image pickup system, an explosive cooking-off system and a gas analysis system. The device adjusts and records the cooking-off temperature of a tested explosive by adopting a program control method. The reaction phenomena in the explosive testing process are recorded through the high-definition image pickup system. The qualitative analysis is conducted on decomposed gas products at different stages in the cooking-off process through the gas analysis system. The visualized explosive cooking-off and gas product analysis device is mainly used for thermal safety research of an energy-containing material / formula.

A method for dissolved gas analysis is presented. The method includes the steps of irradiating a fluid with electromagnetic radiation; and determining a concentration of a gas as a function of a temperature change of the fluid in response to the irradiation. A device for such an analysis of dissolved gases in a fluid, and a system having such device are also described.

A gas sensor array containing a gas flow path in which a gas to be analyzed flows, and a plurality of gas sensors set along the gas flowing direction of the gas flow path, wherein the gas sensors each has a constitution wherein semiconductor microcrystals that come into contact with the gas to be analyzed that flows in the above gas flow path are disposed between two electrodes.

A laser Raman sample cell consists of top section including eyelet light diaphragm set at top and bottom separately, spherical total reflector, curvature center at center of middle section and air tap at side; middle section including columnar hole at internal, a side hole with hollow cylinder in it, thin round plate with an interference filter at back and bottom section including eyelet light diaphragm set on top and bottom separately, convergent lens at middle and focal point at center of middle section.

A blood analysis apparatus configured such that a nozzle sucks a predetermined amount of a blood specimen in a specimen container, and dispenses the specimen to each blood cell counting part which obtains count data, and a control part processes the count data to perform blood analysis. In this apparatus, two or more blood cell counting parts (basophil counting part, LMNE counting part, red blood cell counting part, white blood cell counting part) are constituted to obtain the count data of the same particular blood cell type (white blood cells), and the control part calculates the ratio or number of the existing blood cell from each count data, and judges whether the amount of the blood specimen sucked in the nozzle is normal or insufficient by comparing respective calculation results to determine whether they are within the predetermined allowable ranges.