19 results about "Blood volume" patented technology

A mechanism for processing one or more laser speckle images. A spatial frequency transform is used to transform the one or more laser speckle images into spatial frequency data. The spatial frequency data is used to define a plurality of blood velocity indicators, which each indicate an amount of blood moving at a particular velocity within an illuminated region of interest.

An oral care system for sensing blood in an oral cavity and in gum tissue. The sensing is performed magnetically using a magnetic field source (16) and magnetic sensing arrangement (18) incorporated into a cleaning or treatment portion of an oral care device (e.g. a brush head of a toothbrush or mouthpiece part of a brushing mouthpiece device). The field source generates (16) a reference field and the sensing arrangement (18) is arranged to sense the field strength of the reference field at one or more spatial points. Since blood is magnetic, when brought into the reference field, it magnetically interacts with the field, which may alter field strength, field shape, or flux distribution. This enables presence of blood to be detected. It also allows for detecting specific oral features or disease states associated with presence of blood or abnormal amounts or concentrations of blood. For example, this can be based on application of detection criteria which relate to one or more properties of the sensed field.

A measurement system that can be used at the bedside of a patient to monitor the amount of blood drawn from the patient. The system uses a disposable sensor and electronics to accurately and in real-time measure the volume of blood drawn from the patient using a paddle wheel sensor, where the rotation of the paddle wheel is correlated to the volume of blood drawn and collected from the patient.

A system and a method for determining a physiological parameter of a body comprising blood perfused tissue, the system comprising a first sensor configured to receive first radiation from the blood perfused tissue and, based on the received first radiation, provide first information relating to an amount of blood in the tissue, such as from an absorption of the first radiation in the tissue, a second sensor configured to receive second radiation from the blood perfused tissue and, based on the received second radiation, provide second information relating to a speed of blood in the tissue, such as from Doppler shift of the second radiation, a controller configured to determine the physiological parameter from the first information and the second information.

An input interface is configured to receive a signal corresponding to a quantity of light that has passed through a living tissue of a subject. A pressurization controller is configured to control a pressurizing operation performed with a pressurization device attached to a body of the subject, thereby changing at least one of a thickness of the living tissue, an amount of blood contained in the living tissue, an amount of cellular interstitial fluid contained in the living tissue, an amount of blood flowing into the living tissue, and an amount of blood flowing out from the living tissue. A processor is configured to acquire, from a temporal change of the signal due to the pressurizing operation, a feature quantity that is used for estimating at least one of a physiological state of the living tissue and a disease state of the subject. An output interface is configured to output a signal corresponding to the feature quantity. The light includes first infrared light for which for which a difference between the absorbance of oxygenated hemoglobin in blood and absorbance of deoxygenated hemoglobin is less than a prescribed value; and second infrared light for which absorbance of water is more than absorbance of hemoglobin.

A disposable blood metering device. A measurement system that can be used at the bedside of a patient to monitor an amount of blood drawn from the patient. The system uses disposable sensors and electronics to accurately and in real time measure the volume of blood drawn from a patient using a paddle wheel sensor, wherein the rotation of the paddle wheel is associated with the volume of blood drawn and collected from the patient.

The invention belongs to the technical field of medical instruments, and discloses a multi-modal intraoperative bleeding amount real-time estimation method and system, the volume proportion of blood in a mixed solution is calculated through multi-band absorbance information, and the interference of irrigation solution dilution on blood loss amount evaluation is effectively solved; the blood amount in the suction bottle is calculated by combining the weight of the mixed liquid and the suction flow, so that the accuracy of liquid amount measurement is improved; the gauze is tracked and recognized through the surgical field video, the blood content is estimated, and automatic evaluation of the blood content of the gauze is achieved; finally, the Kalman filtering algorithm is used for fusing multi-source data, the accumulated blood loss amount and blood loss rate are dynamically calculated, the real-time performance and robustness of estimation are remarkably improved, and second-level blood loss rate information can be provided. In addition, according to the method, graded warning can be carried out according to the blood loss condition, a blood transfusion pump and an anaesthesia machine are controlled in a linkage mode, and auditable logs are recorded; therefore, the accuracy, the real-time performance, the intelligent level and the traceability of intraoperative blood loss volume evaluation are comprehensively improved.

The utility model provides a high sensitivity flow type antibody quantitative detection suite, relates to medical supplies technical field, including test paper, solution bag, dipping cotton swab, anti-collision box and quantitation subassembly, dipping cotton swab middle is equipped with the middle folding groove, quantitation subassembly includes test tube and cambered surface piece, cambered surface piece bottom is fixed with the fixed rubber ring, and the fixed rubber ring is fixed in the middle folding groove. A mode of installing a pressing rubber ring is adopted to solve the problem of flow antibody detection, which is an advanced immunoassay technology, a common user can also carry out self-test at home, the test suite generally comprises all necessary materials and instructions, so that the user can collect and analyze a blood sample through simple steps, but under the condition of no professional guidance, the test suite has the advantages of simple operation and low cost. In the prior art, the risk of operation errors exists, a user is difficult to master the dropping amount of a solution to test paper after sampling blood and dropping the blood into a medical solvent, if the dropping amount of the blood is too small or too large, the reagent reaction is incomplete, the final detection result is influenced, the test result is inaccurate, and the sensitivity is reduced.

The blood pump-oxygenator system (1; ,...; 10) comprises at least one blood pump (11), at least one oxygenator (20, 21), a blood inlet (80) and a blood outlet (90) connected together to form a circuit operable as a cardiopulmonary bypass system suitable for extracorporeal treatment of patient blood, wherein the first blood pump (11) is configured to deliver blood through the circuit from the patient (P) to the blood inflow port (80), through the oxygenator (20, 21) and out of the blood outflow port (90) back into the patient (P). The system (1; ,...; the device (10) further comprises a recirculation loop (100) arranged between the blood inlet (80) and the blood outlet (90), where the recirculation loop (100) houses a first blood pump (11) and an oxygenator (20, 21), where the first blood pump (11) is configured to circulate at least a portion of the blood in the loop through the recirculation loop (100) such that the blood passes through the oxygenator (20, 21) multiple times, and where the first blood pump (11) is configured to circulate at least a portion of the blood in the loop through the recirculation loop (100). Blood is repeatedly subjected to an exchange of O2 and CO2 in oxygenators (20, 21). At least one first valve (31) is provided between the recirculation loop (100) and the blood flow outlet (90) and is configured to control an amount of blood flowing through the recirculation loop (100).

Systems and methods for receiving batches of sample containers (e.g., blood culture bottles), sorting the sample containers, and discarding negative sample containers in a safe, secure, and consistent manner are disclosed. Additionally, systems and methods to accurately and precisely determine the amount of sample inoculated into a container are disclosed. For example, an apparatus determines the amount of blood inoculated into a blood culture bottle by weighing and / or obtaining an image of the blood culture bottle inoculated with blood sample. Such an approach facilitates automation, as a user does not need to visually inspect each bottle.

Systems and methods for reducing ventricular filling volume are disclosed.SOLUTION: The stimulation circuit is used to stimulate the patient's heart to reduce ventricular filling volume or blood pressure. When the heart is stimulated to a certain degree to reduce the blood pressure, the cardiovascular system may eventually adapt to the stimulation and return to a higher blood pressure. The stimulation pattern may be inconsistently configured such that an adaptive response of the heart is reduced or prevented, and the stimulation circuitry may be used to stimulate the patient's heart to cause at least a portion of the atrial contraction with the atrioventricular valve closed. Such atrial contraction causes less blood to enter the corresponding ventricle than when the atrioventricular valve is open throughout atrial contraction.SELECTED DRAWING: Figure 9

The invention relates to an interesting sports method for dynamically adjusting content based on personnel completion degree, which belongs to the technical field of interesting sports, and comprises the following steps: determining an initial pixel height score when an interesting sports guard prepares; determining a leg lifting degree score of each high leg lifting; determining that accumulated amplification props generate scores, determining whether to provide enhanced props according to the magnitude of the scores generated by the amplification props, and accumulating amplification integral starting points; determining accumulated reply prop generation scores, determining whether reply props are provided or not according to the sizes of the reply prop generation scores, and accumulating reply point starting points; determining a monster variation score accumulated per second, determining whether to provide a variation monster according to the size of the monster variation score, reducing the blood volume of personnel, and accumulating a variation integral starting point; determining an ending judgment score per second, and judging whether the interesting exercise is ended or not; if the interesting exercise ends, determining the exercise score of the person, and guiding the person to exercise according to the exercise score of the person.

To control pressure fluctuation in an extracorporeal circulation part while reducing an extracorporeal circulation blood amount.SOLUTION: An arterial clamp capable of opening and closing the arterial blood circuit, a venous clamp capable of opening and closing the venous blood circuit, a pump capable of introducing or discharging air into or from the gas circuit, and a processing unit configured to control the pump, the arterial clamp, and the venous clamp, and a clamp control unit configured to perform control such that the flow path of the arterial blood circuit is opened by the arterial clamp and the flow path of the venous blood circuit is closed by the venous clamp during the blood removal treatment, and the flow path of the arterial blood circuit is closed by the arterial clamp and the flow path of the venous blood circuit is opened by the venous clamp during the blood returning treatment.SELECTED DRAWING: Figure 3

A sample analysis method, a sample analyzer, and a computer readable storage medium for analyzing a blood sample. In one test, optical signals generated when particles in a to-be-detected sample solution are irradiated by exciting light when passing through an optical detection area one by one are obtained, the to-be-detected sample solution is obtained after a blood sample is treated with a hemolytic agent, a first dye and a second dye, the first dye can dye white blood cells, and the second dye can dye white blood cells. The second dye can dye infected red blood cells, and the optical signal comprises a scattered light signal, a first fluorescence signal corresponding to the first dye and a second fluorescence signal corresponding to the second dye; identifying nucleated red blood cells based on the scattered light signal and the first fluorescence signal; erythrocyte optical information is obtained based on the scattered light signal and the second fluorescence signal. According to the method, the optical information of the nucleated red blood cells and the optical information of the infected red blood cells can be simultaneously obtained in the same detection channel or the same test, so that the blood volume and the cost for detection are reduced.

A sample analysis method, a sample analyzer and a computer readable storage medium for analyzing a blood sample. In one test, the optical signals generated by each particle in the sample liquid to be tested when irradiated by the excitation light when passing through the optical detection area one by one are obtained, the sample liquid to be tested is obtained by treating the blood sample with a hemolytic agent, a first dye and a second dye, the first dye can stain white blood cells, and the second dye can stain infected red blood cells, the optical signals include a scattering light signal, a first fluorescent signal corresponding to the first dye and a second fluorescent signal corresponding to the second dye; obtain white blood cell optical information based on the scattering light signal and the first fluorescent signal; obtain red blood cell optical information based on the scattering light signal and the second fluorescent signal. Through the method, white blood cell optical information and infected red blood cell optical information can be obtained simultaneously in the same detection channel or in the same test, thereby reducing the blood volume and cost for detection.

An input interface is configured to receive a signal corresponding to a quantity of light that has passed through a living tissue of a subject. A pressurization controller is configured to control a pressurizing operation performed with a pressurization device attached to a body of the subject, thereby changing at least one of a thickness of the living tissue, an amount of blood contained in the living tissue, an amount of cellular interstitial fluid contained in the living tissue, an amount of blood flowing into the living tissue, and an amount of blood flowing out from the living tissue. A processor is configured to acquire, from a temporal change of the signal due to the pressurizing operation, a feature quantity that is used for estimating at least one of a physiological state of the living tissue and a disease state of the subject.

The utility model discloses an experimental rat thrombus preparation device which comprises a rectangular groove used for containing blood, the blood is solidified at the bottom of the rectangular groove, scale marks are arranged on the inner wall of the rectangular groove, and the amount of the blood injected into the rectangular groove is controlled through the scale marks. The top of the rectangular groove is detachably connected with a sealing plate; a cutting block and a square frame are further included, the cutting block comprises a horizontal panel, parallel cutting knives are densely distributed at the bottom of the horizontal panel, the distance between the cutting knives is 1-3 mm, a handle is arranged in the center of the top of the horizontal panel, and the cutting block is used for cutting blood clots solidified at the bottom of the rectangular groove; the front baffle and the side baffles of the square frame are detachably connected, and the square frame is used for being placed in the rectangular groove and abutting against one corner of the rectangular groove so as to guide the cutting block. And the blood is coagulated in the rectangular groove, and the coagulated blood is planar, so that the size of the blood clot can be stably controlled, and the problems that the size of the original capillary glass tube thrombus block is unstable, and the coagulated blood is difficult to take out from the capillary glass tube are solved.

The application relates to the technical field of medical image processing, and discloses a three-dimensional cerebral blood volume image generation method, system, device and medium. The method comprises the following steps: acquiring MRI three-dimensional body data and real CBV three-dimensional body data of a plurality of objects; gradually adding noise to each real CBV three-dimensional body data based on a diffusion model, and gradually denoising joint input formed by each noise-added sample and corresponding MRI three-dimensional body data; taking a denoising network of the diffusion model as a generator, acquiring all generated CBV three-dimensional body data output by the generator, discriminating each generated CBV three-dimensional body data according to a feature matching degree of the generated CBV three-dimensional body data and corresponding real CBV three-dimensional body data through a discriminator, and training the discriminator and the generator through a discrimination result of the discriminator and the feature matching degree; and inputting MRI three-dimensional body data of a target object into a model trained through the above steps, to generate a corresponding three-dimensional CBV image.

An apparatus for determining heart transplant rejection of a heart in a patient includes at least two electrodes adapted to be sewn into the heart that span the left ventricle. The apparatus includes a voltage generator adapted to be inserted in the patient which generates a voltage to the two electrodes and senses the resulting voltage from the two electrodes. A method for determining heart transplant rejection of a heart in a patient. A pacemaker for a patient (including bi-ventricular pacing and AICDs). The pacemaker includes an RV lead having four electrodes adapted to be inserted into the RV apex. The pacemaker includes a voltage generator which generates a voltage signal to the electrodes and senses the instantaneous voltage along the length of the RV and determines the real and imaginary components to remove the myocardial components of the septum and RV free wall to determine absolute RV blood volume. The pacemaker includes a battery connected to the voltage generator. The pacemaker includes a defibrillator connected to the battery. The pacemaker can also be a bi-ventricular pacemaker to restore RV and LV synchrony during contraction. A method for assisting a heart of a patient.