220 results about "Normal blood volume" patented technology

The invention relates to the technical field of intraoperative bleeding amount monitoring, and provides an intelligent intraoperative bleeding amount monitoring and alarming method and system.The method comprises the steps that during an operation, blood, body fluid and cleaning fluid in an operation area are cleaned in time through a suction bottle and gauze; after the gauze is used, the absorbed liquid is partially screwed out and flows into the liquid collecting tank; weight changes of the suction bottle and the gauze storage area are detected in real time respectively, signals are transmitted to the data processing module, the concentration of hemoglobin in the two kinds of liquid is detected, the concentration of blood in the liquid is calculated, and the concentration of the hemoglobin in the liquid is calculated by combining the amount of the liquid sucked by the suction bottle and the amount of the liquid taken out by the gauze in real time. The amount of blood brought out by the gauze and the amount of blood sucked out by the suction bottle are calculated in real time, the real-time bleeding amount of a patient in an operation is obtained, and when the real-time bleeding amount reaches a threshold value, early warning is given out. The problems that errors are large in a traditional method, and particularly in a large amount of blood loss or a complex operation scene, the blood loss dynamic state is difficult to master timely and accurately are solved.

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.

A majority of military casualties occur during the pre-hospital period. The cause of death is largely associated with massive traumatic bleeding that leads to organ damage due to sustained hypoxia. Currently, therapeutics are lacking at the point of injury to mitigate hypoxic damage and maintain the survivability of severe hemorrhage prior to reaching medical facilities. This invention addresses that by introducing a method of co-administering prolyl hydroxylase domain inhibitor (PHDi, MK-8617), anti-fibrinolytic agent (tranexamic acid), and bradykinin receptor antagonist (icatibant) as anti-hemorrhage agents in combination with resuscitation fluid treatment with colloid solution of 25% human albumin that has an advantage of relatively small volume requirement to maintain blood volume. In addition, a kit comprising anti-hemorrhage agents that can be easily carried to the battlefield is also provided here. The therapeutic application of those agents on or near the point of injury can stabilize hypoxia inducible factor-1 alpha and enhance blood clot formation, which improves the patient's cellular adaptation to hypoxia and reduce hemorrhage, and thus can decrease organ failure and increase the patient's survivability.

Systems and methods are provided for non-invasively measuring one or more hemodynamic variables using a peripheral arterial region wearable device having a strain sensor and a photoplethysmogram sensor. Different line fit profiles are determined from device collected signals indicative of the strain response versus externally applied cuff pressure and the blood volume and / or the blood circulation changes versus externally applied cuff pressure. From these line fit profiles, external cuff pressure affected line fit features are determined, from which hemodynamic variables for the peripheral arterial region such as blood pressure and / or a systemic vascular resistance are then determined.

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.

The invention provides a first-aid online vital sign monitoring method based on rPPG, and relates to the technical field of first aid. The method comprises the following steps: acquiring a face video of a to-be-detected face; for the face presented in the face video, a change image of subcutaneous blood volume is determined, and the change image comprises a pre-change image and a post-change image; the rPPG is adopted to process the change image so as to judge whether the vital signs corresponding to the face are preset signs to be subjected to emergency treatment or not; and if the vital sign is the preset sign to be subjected to emergency treatment, generating and outputting a message to be subjected to emergency treatment. According to the method, whether the vital signs corresponding to the face are the signs to be subjected to emergency treatment or not can be judged through rPPG detection, then whether emergency treatment is needed or not is judged, and a judgment basis is provided for pre-hospital emergency treatment.

Apparatus, systems, and methods are provided for optimizing intracardiac filling pressures and cardiac output in patients with heart failure, conduction disease, and atrial fibrillation. The system is able to adjust and optimize intracardiac filling pressures and cardiac output by adjusting heart rate and the effective amount of total body blood volume. The device includes an adjustable member that may create a mean pressure differential in order to manifest an effective “mechanical diuresis” by sequestering extraneous blood volume to the high-capacitance of the venous vasculature. The system is therefore designed to reduce intracardiac filling pressures while maintaining or even increasing cardiac output.

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.

Disclosed are methods, materials and devices for approximating blood volume in a fluid obtained from a subject, such as blood in a biological fluid collected during a surgical procedure. In particular applications, methods of estimating blood volume in a sample as part of a method for estimating blood loss from a subject are provided. The methods provide for a much accelerated technique for determining blood volume and / or packed red blood cell units in a sample (within about 5-10 minutes). The method and devices (canisters) may include a red blood cell (RBC) flocculant, such as polyDADMAC, and employ a formula that includes a value for an approximate blood hematocrit, and an approximate red blood cell packing ratio (“η”) for a collection container. A Blood Indicator Panel (BIP) is also disclosed that comprises a material and / or panel that may be placed alongside or on a collection device, the material and / or panel being suitable for inscribing / printing thereon a series of graduated markings calibrated to coincide with an approximate volume of blood and / or unit measure of packed red blood cells. The series of graduated markings correspond to a calculation of blood volume or red blood cell volume in a fluid sample, for example, according to a defined formula. Pediatric (about 200 ml or 250 ml size container), adult human (about 1,000 ml-1,500 ml) and veterinary (about 500 ml-2,500 ml) methods of measurement are also disclosed. Methods for detecting blood and determining approximate blood volume in a sample (e.g., a fluid biological sample), and kits for performing the methods, are also provided.

The utility model relates to the technical field of medical instruments, and particularly discloses a relative blood volume detection device which comprises a shell, a front cover, a rear cover and a pipeline to be detected, and the shell is movably connected with the front cover and the rear cover respectively. The movable clamp is arranged on one side of the shell and is used for fixing a lug boss at the front edge position of the front cover through a front end buckling position, so that the front cover is attached to the surface of the shell; and a placing channel for a pipeline to be detected is arranged along the vertical direction of the center of the faying surface of the shell. The device further comprises a photoelectric module structural member arranged in the shell, a U-shaped through groove capable of containing a pipeline to be detected is formed along a photoelectric module structural member body and corresponds to the channel, a first emitter and a second emitter are arranged on one side of the U-shaped through groove, a second receiver and a spectroscope are arranged on the other side of the U-shaped through groove, and the spectroscope is arranged at an angle of 45 degrees along the side face of the groove. A first receiver is arranged along the back of the spectroscope.

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.

The present invention relates to an assist system for hydration treatment, the assist system comprising: a container configured to store water to be drunk by a patient; the acquisition unit is arranged on the container and is configured to acquire relevant information of water stored in the container; the acquisition unit is configured to acquire physiological parameter information reflecting the hydration treatment effect of a patient, the processing unit is in signal connection with the acquisition unit and the monitoring unit, and the processing unit is configured to acquire the physiological parameter information after the patient receives the hydration treatment. According to the water volume change information of the water stored in the container and the urine volume of the patient and / or the parameter information reflecting the blood volume state, the single water drinking volume and / or the water drinking interval time in the hydration scheme of the patient are / is dynamically adjusted. The problem that when standard oral hydration treatment is carried out, a fixed hydration treatment scheme is difficult to flexibly adjust according to the actual situation of a patient, and consequently the hydration effect is poor is solved.

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.