169 results about "Normal blood volume" patented technology

An asymmetric device for regulating blood volume distribution across a patient's atrial septum having a first expandable end region and a second expandable end region. The first expandable end region is transitionable from a contracted delivery state to an expanded deployed state in which the first expandable end region extends into the patient's left atrium and an inlet end of the first expandable end region is in a first plane. The second expandable end region is transitionable from a contracted delivery state to an expanded deployed state in which the second expandable end region extends into the patient's right atrium and an outlet end of the second expandable end region is in a second plane, such that the first plane intersects the second plane. The device further includes a neck region joining the first expandable end region to the second expandable end region, wherein the neck region is sized and shaped for placement in the patient's atrial septum.

The invention discloses a blood volume detection device and method based on a brain angiography image, and relates to the technical field of blood volume detection of the brain angiography image, the blood volume detection device comprises a detection device body and a substrate, the top surface of the substrate is fixedly provided with a lifting platform, and the surface of the top end of the lifting platform is fixedly provided with a workbench; and the linear motor is installed in the middle of the top face of the workbench, and a movable bed plate is horizontally and fixedly installed on the movable end face of the top of the linear motor. According to the blood volume detection device and method based on the brain angiography image, displacement compensation closed-loop control is achieved through the fine adjustment feedback module of the adjusting mechanism, and the gear meshing clearance compensation error is reduced; the LSTM network and the hybrid FEM-LBM algorithm are cooperatively optimized, the blood flow calculation speed is multiplied, an isolation telescopic sleeve shell and a shielding plate are arranged to form a composite shielding layer, the radiation leakage amount is reduced, the radiation monitoring module achieves real-time alarm of dose exceeding, and the protection level is improved.

The invention relates to the technical field of hemodialysis, and discloses a hemodialysis ultrafiltration amount adjusting system based on multi-parameter self-adaptive control, which is used for solving the problem of insufficient prediction and prevention precision of a hemodialysis induced hypotension risk in a traditional system. According to the method, firstly, multi-parameter physiological data of the blood volume, the blood pressure and the ion concentration are synchronously collected in the whole dialysis process, then a physiological state data set is constructed through unified standardization and correlation matching, related change modes of the blood volume and the blood pressure are extracted, and ion deviation is superposed to form comprehensive risk characteristics; the risk characteristics are compared with a preset threshold value through trend analysis, the weight of each risk component is adjusted in a self-adaptive mode, a hypotension risk trend index is generated, the ultrafiltration rate is dynamically adjusted in a graded mode according to the indexes, the indexes are coupled with a real-time physiological data feedback closed loop, and therefore the prediction precision and the regulation and control refinement level of dialysis-induced hypotension are improved.

A wearable device with a light source and an optical sensor. In some embodiments, a system includes a wearable device for being worn by a subject and for measuring a first biomarker of a blood vessel of the subject. The wearable device may include a first light source, and a plurality of optical detectors. The system may be configured: to perform a photoplethysmography measurement with each of the plurality of optical detectors, the first biomarker being a blood volume; or to perform a speckleplethysmography measurement with each of the plurality of optical detectors, the first biomarker being a blood flow velocity.

The invention relates to a method for determining a fluid volume flow (1) through an implanted vascular support system (2), comprising the following steps: a) determining a fluid temperature parameter in the region of a cannula (4) of the support system (2), b) operating a heating element (5) which can bring about a change in a fluid temperature in the cannula (4), c) determining the fluid volume flow (1) using at least the fluid temperature parameter or the change thereof and at least one heating element operating parameter or the change thereof. The invention also relates to a vascular support system.

An asymmetric device for regulating blood volume distribution across a patient's atrial septum having a first expandable end region and a second expandable end region. The first expandable end region is transitionable from a contracted delivery state to an expanded deployed state in which the first expandable end region extends into the patient's left atrium and an inlet end of the first expandable end region is in a first plane. The second expandable end region is transitionable from a contracted delivery state to an expanded deployed state in which the second expandable end region extends into the patient's right atrium and an outlet end of the second expandable end region is in a second plane, such that the first plane intersects the second plane. The device further includes a neck region joining the first expandable end region to the second expandable end region, wherein the neck region is sized and shaped for placement in the patient's atrial septum.

The invention discloses a net ultrafiltration rate intelligent regulation and control device and method for CRRT treatment, and relates to the technical field of medical equipment control, and the device comprises a sensor module, a data processing module and a regulation and control module; the sensor module is used for acquiring CRRT treatment associated data of a preset patient; the data processing module is used for predicting a blood volume tolerance curve of a preset patient by utilizing an artificial intelligence technology according to historical CRRT treatment data and CRRT treatment associated data of the preset patient, and generating a net ultrafiltration rate time sequence scheme according to the predicted blood volume tolerance curve and a preset treatment target of the preset patient; and the regulation and control module is used for automatically regulating the rotating speed of a blood pump and the rotating speed of a displacement liquid pump which are used for performing CRRT treatment on the preset patient according to the net ultrafiltration rate time sequence scheme, and regulating the dehydration rate of the preset patient. According to the invention, a more accurate intelligent regulation and control mode can be provided for CRRT treatment.

The invention discloses a non-inductive physical and psychological health monitoring and early warning system and method before a coal miner goes down a well, and belongs to the technical field of coal mine safety production and personnel health monitoring. A physiological monitoring unit comprises a millimeter-wave radar, an infrared camera and an imaging type photoplethysmography device, the millimeter-wave radar is installed in the center of the top of a monitoring channel, and the infrared camera is installed on the imaging type photoplethysmography device; the infrared cameras are symmetrically installed on the two sides of the channel, the imaging type photoplethysmography devices are integrated in the infrared cameras and used for synchronously collecting the core body temperature and the oxyhemoglobin saturation, and the integrated imaging type photoplethysmography devices focus on the forehead and cheek areas through the RGB channel. Reflected light intensity fluctuation signals caused by blood vessel blood volume changes are collected. Through cooperation of the three devices, non-contact synchronous collection of multiple parameters can be completed without deliberate cooperation of workers, comprehensive and continuous basic data are provided for subsequent physical and psychological health analysis, the wellhead passing efficiency is improved, and the cross infection risk of contact type devices is avoided.

The invention relates to an anemia blood transfusion risk management system based on real-time monitoring, and belongs to the technical field of medical data processing. The management system comprises a plurality of sensors and is used for acquiring multiple monitoring data such as hemoglobin concentration, blood oxygen saturation waveform and cardiovascular waveform of a patient, and real-time analysis is executed by a calculation module. The calculation module quantifies key indexes such as blood volume change and hemoglobin concentration by constructing a dynamic risk index model, and performs morphological similarity comparison on a real-time waveform and a plurality of established reference waveform templates. And the management system corrects the risk level based on the similarity analysis result and outputs a comprehensive score. The score can be used as a reference standard for clinical blood transfusion intervention.

A multi-sensor remote patient monitoring platform combines multiple technologies on a patient's own device to dramatically reduce the number of devices a patient needs while also reducing device distribution logistics on health care providers. Continuous temperature monitors can be used to collect frequent temperature data over large periods of time. Additionally, a rPPG device can obtain at least one vital sign data by a remote photoplethysmogram (rPPG) comprising a plethysmogram that is optically obtained via a camera by detection of blood volume changes in the microvascular bed of tissue of the patient. The temperature data and vital sign data can be input into a remote server-side computer system that can analyze the received data for indication of a fever, and provide an alert to the patient or a clinician when the result of the analysis indicates the fever. Such alerts can be clinically beneficial for disease states in which fever can be fatal, particularly for those fevers having fast onset.

The invention relates to the technical field of mattresses, in particular to a multifunctional heart failure patient condition monitoring mattress which comprises a mattress body. The mattress further comprises an adjusting mechanism, a monitoring mechanism and an analysis processing module, and the adjusting mechanism, the monitoring mechanism and the analysis processing module are all mounted on the mattress main body; the monitoring mechanism is used for monitoring the physical condition of a patient, the adjusting mechanism is used for adjusting the heights of different positions of the mattress main body, and the analyzing and processing module is used for analyzing and processing data acquired by the monitoring mechanism; a patient lies on the mattress body, the physical condition of the patient is monitored through the monitoring mechanism, then data obtained by the monitoring mechanism is analyzed and processed through the analysis and processing module, and the adjusting mechanism is controlled to adjust the heights of different positions of the mattress body, so that the shape of the mattress body is suitable for the patient, and the return blood volume is reduced; the comfort of the patient is improved, and the morbidity of the patient is reduced.

Systems and methods for implanting a shunt for regulating blood pressure between a patient's left and right atria are provided. The shunt comprises an anchor having a neck region, first and second end regions, and a conduit affixed with the anchor formed of a biocompatible material that is resistant to transmural and translation tissue ingrowth and that reduces a risk of paradoxical embolism. The shunt may be advanced through the sheath until the first region protrudes from the sheath and self-expands within the left atrium. The shunt and the sheath may then be retracted until the first region contacts the left side of the atrial septum. The sheath may further be retracted until the counterforce exerted by shunt tension on the atrial septum overcomes the friction of the retained portions of the shunt such that the second region is exposed from the sheath and self-expands within the second atrium.

Separation of the cellular components of whole blood, or other biological fluid, from plasma or serum can be achieved for assay analysis. A device for facilitating separation can include, for example, a capillary tube that accurately draws target blood volume, a pad that chemically interacts with red-blood cells, such that the red blood cells become chemically and / or physically trapped within pad material, a mechanism for plasma recovery from the pad upon diffusion or active mixing, and a dropper tip that facilitates dispensing the mixture onto a test device. The treatment of the cellular components can be performed prior to contact with a buffer solution, so release of the cellular components into the buffer solution is reduced or prevented. Additional filtration can be provided to filter any remaining cellular components in the mixture.

In a blood volume mode, at least one of a blood volume image or a blood-volume-and-oxygen-saturation-at-each-time-point graph is displayed on an extended display. An image acquisition unit acquires a reference point image and acquires a blood volume mode image at a time interval set by a user. A calculation unit calculates average values of a blood volume and an oxygen saturation based on pixels included in a region of interest. A time-series image generation unit generates the blood volume image showing a change amount of the blood volume. A temporal change graph generation unit generates the blood-volume-and-oxygen-saturation-at-each-time-point graph for the time points at which the images are acquired.

A system and method for determining a patient's fluid-dependent hemodynamic responsiveness. The system comprises a processor configured to receive one or more of: one or more patient characteristics, one or more surgery characteristics, or one or more measured patient blood parameters. The processor is further configured to receive fluid challenge characteristics for a fluid challenge administered intravenously to the patient, and one or more measurements indicative of the patient heart function before and after the administration of the fluid challenge. The processor determines the patient blood volume (BV) within the patient's central blood compartment, before and after the administration of the fluid challenge, based on the received fluid challenge characteristics and the received one or more of: one or more patient characteristics, one or more surgery characteristics, or one or more measured patient blood parameters. The processor then calculates the relationship between the change in patient blood volume (ABV) and the change in patient heart function.

The invention is suitable for the technical field of bio-photonics, and provides a capillary refilling time self-adaptive measurement system and method, and the system comprises a negative pressure adsorption module, a step release module, a modulation module, a detection module, a demodulation module, a signal processing module and a main control unit. Standardized microcirculation stimulation is realized through negative pressure adsorption and step release; adopting a frequency domain modulation and demodulation technology to obtain the phase and the amplitude of the optical signal, and inverting an absolute absorption coefficient and a reduced scattering coefficient by utilizing a frequency domain diffusion equation; and selecting an absolute absorption coefficient under equal absorption point wavelength as a blood volume index, fitting a recovery curve through a system identification model, and calculating to obtain self-adaptive capillary refilling time. According to the collaborative scheme, the problems that in the prior art, stimulation is not standard, the result is greatly influenced by skin color and temperature, and absolute parameter support is lacked are solved, and objective and accurate measurement which is high in repeatability, cross in skin color and resistant to environmental interference is achieved.

The invention discloses a production method and system of a sanitary towel with a self-adaptive temperature adjustment function, and relates to the field of sanitary towels. And obtaining physical sign data, blood volume and motion images. And based on the physical sign data, the blood volume and the motion image, predicting a human body state to obtain a menstrual state category. And based on the menstrual state category and the human body temperature, obtaining an adjustment temperature. And recording the body state through the neural network. According to the female menstrual period nursing product integrated with the intelligent temperature control system, through real-time monitoring and intelligent adjustment, the technical effects that the local optimum temperature can be maintained, menstrual period discomfort is relieved, and the comfort level and the health management level are improved are achieved.

A system (100) and method (1000) for managing fluid administration to a patient (120) following administration of an anaesthetic. The system (100) comprises a processor (112) configured to receive monitored patient haemoglobin data before and after the administration of the anaesthetic. The processor (112) is configured to calculate a baseline blood volume (BBV) of the patient (120). After administration of the anaesthetic, the processor (112) is configured to calculate a target blood volume (TBV), wherein the target blood volume (TBV) is calculated by comparing the monitored patient haemoglobin data before and after the administration of the anaesthetic.

The invention belongs to the field of intelligent medical treatment, and particularly relates to a method, equipment, medium and program product for predicting RMPP based on lung microvascular changes. The method comprises the following steps: S101, acquiring a CT image of a pediatric MPP patient; s102, the CT image is extracted to obtain a quantitative PBV parameter, the quantitative PBV parameter comprises BV10%, and BV10% refers to the percentage of the blood volume in a blood vessel with the blood vessel cross section area larger than 10 mm < 2 > in the total lung blood volume; and S103, if BV10% is higher than a first threshold value, judging that the pediatric MPP patient develops into a prediction result with high RMPP risk, and otherwise, outputting a prediction result with low RMPP risk. According to the application, the prediction effect on the occurrence and development of the RMPP is found by quantitatively measuring the microvascular change in the CT, and the clinical value of early diagnosis of the RMPP is realized, so that the clinical early treatment is driven.

This application relates to a blood pump, comprising a primary pumping device, a first catheter, a secondary pumping device, and a second catheter connected in sequence. The primary pumping device has a first inlet and a first outlet, and the secondary pumping device has a second inlet and a second outlet. The secondary pumping device includes a secondary cannula, which has a proximal end, a distal end, and an enlarged portion. The proximal end is adjacent to the second catheter and has a second outlet. The distal end is connected to the first catheter and has a second inlet. The two ends of the enlarged portion are smoothly transitioned to the proximal end and the distal end, respectively. This blood pump increases the blood volume pumped by the secondary pumping device, allowing most of the blood in the aorta to be accelerated by the secondary pumping device, thus significantly improving the pumping efficiency of the secondary pumping device.

The utility model belongs to the technical field of medical instruments, and particularly relates to a bloodletting device. In the bloodletting device, one end of a drainage tube is connected with a puncture needle through a three-way connector, the other end of the drainage tube is communicated with a drainage bag, and a peristaltic pump is sleeved with the middle of the drainage tube; the puncture needle is punctured into a vein of a patient, the pump head of the peristaltic pump is used for extruding the drainage tube to generate negative pressure in the drainage tube, blood is pumped out of the vein at a constant speed, the stable bloodletting effect is achieved, it is guaranteed that one-time bloodletting amount is sufficient, and the ideal treatment effect is achieved.

The utility model relates to an adult simulation load device for online calibration of an extracorporeal membrane oxygenation system. The system comprises a left ventricular artery system simulation box, a right atrial vein system simulation box, a resistance device, a V-A ECMO treatment mode artery perfusion cannula, a V-V ECMO treatment mode vein perfusion cannula, a vein drainage cannula, a bottom plate, a right atrial vein system simulation box hydraulic monitoring sensor, a left ventricular artery system simulation box hydraulic monitoring sensor and a manual pressure release valve. And a ball valve pressurizing device and a vertical partition plate. The left ventricular artery system simulation box, the resistance device and the right atrial vein system simulation box are sequentially connected through pipelines. The device is simple in structure, convenient and practical to operate and capable of accurately simulating the blood volume of a patient, the pressure difference between a venous system and an arterial system and the resistance of a blood circulation system when an adult patient adopts a V-A ECMO treatment mode and a V-V ECMO treatment mode respectively, and has practical value; calibration data has clinical guiding significance, the measurement accuracy of key parameters of equipment is effectively guaranteed, and clinical risks are reduced.

A system includes: a dialysis system configured to provide a dialysis treatment for a patient; an optical monitoring system in communication with the dialysis system, wherein the optical monitoring system is configured to obtain measurements of the patient's hematocrit, oxygen saturation and / or blood volume change during the dialysis treatment, wherein the measurements are indicative of a double pool refill rate for the patient during the dialysis treatment; and a massaging system in communication with the dialysis system, wherein the massaging system is configured to provide massaging for the patient during the dialysis treatment, wherein providing massaging for the patient includes running a massage sequence taking into account the measurements obtained by the optical monitoring system.

Techniques and systems include predicting various health conditions using a photoplethysmography (PPG) signal or a video signal based on images of a patient's fingertip or other body portion captured using a mobile device. The video signal may be transformed into a pseudo PPG signal to measure blood volume changes in the patient's blood flow to derive data indicating a disease state or health-related characteristic, such as blood oxygen level, blood glucose level, heart rate variability, hemoglobin, respiration rate, or arrhythmia. Techniques involve real-time environment assessment and problematic issue detection, training an artificial intelligence (AI) model to measure signal quality so as to select high-quality signals from a range of signals, and domain adaption and transfer learning to make use of publicly available datasets.

An apparatus for blood pressure monitoring comprises: a blood vessel deformation detection sensor unit for monitoring blood volume changes and blood flow in blood vessels of a part of the user's body; a ballistocardiogram sensor unit installed adjacent to the user's back to measure the user's heartbeat; a blood vessel analysis unit for receiving signals from the blood vessel deformation detection sensor unit, analyzing them, and generating a graph; a ballistocardiogram analysis unit for receiving signals from the ballistocardiogram sensor unit, analyzing them, and generating a graph; a calculation unit for receiving data from the blood vessel analysis unit and the ballistocardiogram analysis unit and deriving at least one parameter; and a machine learning unit for receiving data on the parameter from the calculation unit and performing machine learning to derive blood pressure values.

A sensor device or system for performing a blood pressure measurement comprises a finger abutment surface, a first sensor operative to sense blood volume pulses in a finger pressed on the finger abutment surface, a second sensor operative to sense a force or pressure with which the finger is pressed on the finger abutment surface, and processing circuitry operative to process amplitudes of the sensed blood volume pulses and the sensed force or pressure with which the finger is pressed on the finger abutment surface to determine an absolute blood pressure.

A method of cardiac treatment to provide a synergetic therapeutic effect of lowering the hyperactive sympathetic response observed in microvascular disease (MVD) and heart failure (HF) pathologies and promoting cardiac remodeling of left ventricular hypertrophy in a patient. The method may include ablating renal sympathetic nerves of the patient to reduce sympathetic afferent and efferent activity to the kidney, thereby reducing blood pressure, and ablating a greater splanchnic nerve to reduce stressed blood volume with exertion. The method may include ablating renal sympathetic nerves of the patient to reduce sympathetic afferent and efferent activity to the kidney, thereby reducing blood pressure and at least one of: ablating pulmonary artery nerves of the patient to reduce cardiac sympathetic activity; and ablating pulmonary vein nerves of the patient to reduce arrhythmias.

The invention provides a system and a method for monitoring autologous internal arteriovenous fistula of a hemodialysis patient, and relates to the technical field of blood monitoring. Vein data, fat data and muscle data of the patient in the measuring process are collected by analyzing the Doppler ultrasonic blood flow measuring process, and the autologous internal arteriovenous fistula of the patient is obtained by analyzing a vein three-dimensional model; acquiring a vein inner wall area deviation index for reflecting the deviation degree of the vein area of the patient measured by the color Doppler ultrasonic wave, and performing correlation analysis on the fat data and the muscle data; and generating a flow velocity deviation index for reflecting the blood flow measurement deviation degree caused by muscle and fat thickness in the Doppler ultrasonic blood flow velocity measurement process, comprehensively analyzing the flow velocity deviation index and the flow velocity deviation index to generate a blood flow deviation index, comparing the blood flow deviation index with a threshold value, and outputting the blood volume monitoring accuracy level.

Disclosed herein are devices and methods for addressing elevated left-sided filling pressures to mitigate the effects of diastolic dysfunction. The disclosed technologies decrease the temporal increase in blood flow and pressure into the heart from the venous system (which drains from the body). Under exertion, there is a shift of blood from the 'unstressed' reservoir of vasculature to the 'stressed' reservoir. By inhibiting this acute shift of blood from the unstressed reservoir to the stressed reservoir, an undesirable influx of blood volume to the already overloaded left heart can be avoided. Certain embodiments provide ways to maintain or to increase atrial elasticity, or atrial compliance using devices implanted in the left atrium and / or left atrial appendage. This increase or enhancement of atrial compliance enables the atrium to absorb the energy of short bursts of high left atrial pressure.

The utility model discloses a blood pad blood volume counting and counting device, a lifting belt of each blood pad is provided with an electronic tag, the blood pad blood volume counting and counting device comprises an electronic scale and a carrying disc, the electronic scale comprises a shell, a weighing table and a display table, and the weighing table is arranged on the top surface of the shell and located on the rear side of the shell; the display table is arranged on the top surface of the shell and is positioned on the front side of the shell; the carrying disc is suitable for being placed on the weighing table and is used for storing a used blood pad; the electronic scale further comprises a supporting table used for supporting the lifting belt of the blood pad, and the supporting table is provided with a tag reader used for reading the electronic tag. The display table is configured to be capable of displaying the total blood content of the blood pads and the number of the blood pads. According to the counting and counting device for the blood volume of the blood pad, the dual functions of counting the blood pad and measuring the blood volume can be automatically completed, and the efficiency and the accuracy of measuring the blood volume in the operation process are improved.