摘要:
A device, system and method is disclosed in which small volume blood samples are subjected to shear forces and shear stresses between two parallel planar surfaces to which linear motion trajectories are imparted. The formation of clots or coagulation of the sample is measured from dynamic mechanical coupling which occurs between the two parallel planar surfaces. Detection of the coagulation response can be achieved through optical probing or by measurement of physical effects of the blood sample binding to the planar surfaces, and restricting movement thereof.
摘要:
Provided is a method for checking a blood status including: a step of supplying blood to the centrifugal container of a disk; a step of rotating the disk to centrifuge the blood cells and blood plasma in the centrifuge container, and detecting the actual moving distance per hour of the blood cells in the centrifugal container; and a step of establishing a first graph which represents the actual moving distance of the blood cells per hour, and a second graph which represents the theoretical moving distance of the blood cells per hour, and thereafter calculating the hematocrit of the blood cells and the viscosity of the blood plasma by comparing the first graph with the second graph.
摘要:
A method for checking blood status comprises: a step of supplying blood to the centrifuge container of a disk; a step of rotating the disk to centrifuge the blood into blood cells and blood plasma in the centrifuge container, and detecting the actual moving distance per hour of the blood cells in the centrifuge container; and a step of establishing a first graph which represents the actual moving distance of the blood cells per hour, and a second graph which represents the theoretical moving distance of the blood cells per hour, and thereafter calculating the hematocrit of the blood cells and the viscosity of the blood plasma by comparing the first graph with the second graph.
摘要:
In one general aspect, a capillary viscometer is disclosed that includes a source of fluid pressure, and a first capillary tube having an inside volume that is hydraulically responsive to the source of fluid pressure. A two-dimensional array of optical detectors is positioned proximate the first capillary tube with a first plurality of its detectors optically responsive to the inside volume of the first capillary tube and including an image data output. An acquisition driver circuit is responsive to the image data output of the two-dimensional array to acquire a series of successive images of the inside volume of the first capillary tube. Viscosity computation logic is responsive to the acquisition driver circuit and operative to compute the viscosity of the fluid from the succession of images of the inside volume of the first capillary tube.
摘要:
A fluid characterization measuring instrument comprises a sample vessel (14) for a bulk complex sample fluid having a capacity that is substantially larger than a domain size of the complex sample fluid and that is sufficiently large to cause bulk scattering effects to substantially exceed surface effects for the complex fluid sample, a coherent light source (12) positioned to illuminate the bulk complex sample fluid in the sample vessel and a first fibre (16) having a first end positioned to receive backscattered light from the sample after it has interacted with the sample. The first fibre is positioned close enough to an optical axis of the coherent light source and to the sample vessel to substantially decrease a contribution of multiply scattered light in the backscattered light. The instrument further comprises a first photon-counting detector (20) positioned to receive the backscattered light from a second end of the fibre, correlation logic (22) responsive to the first photon-counting detector and single-scattering fluid property analysis logic responsive to the correlation logic and operative to derive at least one fluid property for the sample fluid.
摘要:
A method is provided for characterizing powders and powder behavior in a rotating cylindrical container by image analysis techniques. Powder is placed in a generally cylindrical container with transparent ends. The container is then placed in front of an imaging device and illuminated with a light source so the device can capture images of the powder over time. The container is then rotated at various speeds and the camera captures images of the powder at fixed time intervals. Image analysis algorithms are then used to isolate the powder information in the images and this data is used to calculate several parameters of the powder including the potential energy of the powder, the curvature of the powder, and volume of the powder. From these calculations, the average potential energy level of the powder, the potential energy level at which the powder yields or avalanches, the change in the potential energy before and after an avalanche, the powder surface curvature, and powder volume can be determined as a function of container rotation speed.
摘要:
Disclosed is a blood cell trajectory display device (1) for displaying the blood cell trajectory leading to an agglutination, that is equipped with a TV camera (3) for sequential photographing the flow of blood, a calculation unit (70) that analyzes the blood flow images obtained by the TV camera (3), and a display (8). The calculation unit (70) analyzes a plurality of blood flow image frames and detects the agglutination of blood cells in the blood, and in cases in which blood cell agglutination has been detected, detects the position of said blood cells in the blood flow image frame prior to the frame in which the agglutination was detected, and requests the trajectory of said blood cells to the agglutination point. The display (8) displays the blood cell trajectory requested by the calculation unit (70).
摘要:
Described are compositions and methods related to determining the rate of viscosity change in a suspension in real time. The compositions and methods have a broad range of applications, including the measurement of amylase-mediated liquefaction of a starch suspension.
摘要:
Measuring apparatus comprises a rotating plate 17, a torque detection plate 18 disposed on a same axis parallel to the plate 17 with a given gap, a torque sensor about the plate 18 through the specimen held between two plates. The plate 18 is a total reflection prism which is made from a material that has a greater refractive index than the specimen and transmits UV and infrared light. An ultraviolet beam is directed onto the specimen through the prism. An infrared beam is directed into the prism. The infrared beam emerging from the prism after total reflection from the interface between the prism and the specimen is detected. A signal processor analyzes the infrared absorption spectrum of the specimen on the basis of the infrared beam. While the viscosity of the specimen in the curing process is measured, the signal processor simultaneously measures the infrared absorption spectrum.
摘要:
A method is provided for characterizing powders and powder behavior in a rotating cylindrical container by image analysis techniques. Powder is placed in a generally cylindrical container with transparent ends. The container is then placed in front of an imaging device and illuminated with a light source so the device can capture images of the powder over time. The container is then rotated at various speeds and the camera captures images of the powder at fixed time intervals. Image analysis algorithms are then used to isolate the powder information in the images and this data is used to calculate several parameters of the powder including the potential energy of the powder, the curvature of the powder, and volume of the powder. From these calculations, the average potential energy level of the powder, the potential energy level at which the powder yields or avalanches, the change in the potential energy before and after an avalanche, the powder surface curvature, and powder volume can be determined as a function of container rotation speed.