133 results about "Normal blood volume" patented technology

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.

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.

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.

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.

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.

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 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.

The invention discloses a dynamic algorithm for blood culture positive judgment, which comprises the following steps: S1, data acquisition: a blood volume monitoring module is arranged on a blood culture bottle, and the module adopts at least one of a pressure sensor, a weight sensor or a visual system to monitor the liquid level height and is used for accurately measuring the blood collection volume; after a collected blood sample is injected into the blood culture bottle, the blood volume monitoring module obtains blood collection volume data in real time. According to the invention, the blood volume monitoring module is added to realize accurate measurement of the blood collection volume, a scientific relation model is established by using big data analysis, and a dynamic positive judgment model based on sample information is constructed. According to the algorithm, a dynamic positive judgment threshold value can be calculated according to real-time data, the false positive rate caused by too much blood sampling amount or too much leukocytes of a patient is effectively reduced, the accuracy and timeliness of blood culture detection are remarkably improved, a more reliable basis is provided for clinical diagnosis, doctors are assisted to formulate a reasonable treatment scheme in time, and the treatment effect is improved. The treatment effect and the survival rate of patients are improved.

The utility model relates to a base shield and blood volume control circuit based on an RS485 bus. The base shield and blood volume control circuit comprises a microcontroller, two RS485 bus communication circuits electrically connected with the microcontroller, a dart signal guide lamp circuit electrically connected with the microcontroller and a signal amplification circuit electrically connected with the microcontroller, and the signal amplification circuit is electrically connected with a signal lamp control circuit. The base shield and blood volume control circuit based on the RS485 bus has the advantages that data transmission is stable, the bus is a stable communication protocol, long-distance data transmission can be achieved, and the base shield and blood volume control circuit is suitable for bridging various complex circuit systems; the bus can realize real-time data transmission, so that the response speed of the system is higher, and the system is more suitable for application scenes needing quick response; and the bus has relatively high anti-interference capability and fault tolerance, so that stable operation of the system in a complex environment can be ensured.

The invention provides computer equipment for executing an inferior vena cava ultrasonic image real-time analysis and evaluation method in hemodialysis, the computer equipment comprises a memory, a processor and a computer program, when the processor executes the program, inferior vena cava ultrasonic image data in the hemodialysis process is obtained, the delay duration of inner diameter contraction response is recognized, and the delay duration is calculated; determining a latency plateau period duration based on a time period in which the inner diameter of the blood vessel is maintained relatively stable after the liquid removal speed is changed; according to the latency plateau period duration, when the blood vessel wall rebound speed is higher than the inner diameter contraction speed, high-elasticity reserve is recognized, and according to the inner diameter fluctuation range corresponding to the high-elasticity reserve, the blood volume safety range and the contraction speed threshold value are obtained; acquiring a blood volume measurement value at an ultrafiltration rate intervention time point, triggering reverse adjustment when the blood volume measurement value exceeds a blood volume safety range, and extracting a stable inner diameter contraction speed after the blood volume is stable.

The invention relates to the technical field of medical instruments, and provides a relative blood volume monitoring method and device for a hemodialysis pipeline based on double optical paths, the hemodialysis pipeline comprises a narrow-diameter section and a wide-diameter section which are connected, and the relative blood volume monitoring method comprises the following steps that S1, in dialysis treatment, red light and infrared light are adopted to irradiate the narrow-diameter section of the hemodialysis pipeline, and the narrow-diameter section of the hemodialysis pipeline is irradiated to obtain a blood volume monitoring result; the absorbance delta 1 red of the red light of the narrow-diameter section and the absorbance delta 1 infrared of the infrared light of the narrow-diameter section are calculated; s2, red light and infrared light are adopted to irradiate the wide-diameter section of the hemodialysis pipeline, and the absorbance delta 2 red of the red light of the wide-diameter section and the absorbance delta 2 infrared of the infrared light of the narrow-diameter section are calculated; s3, constructing an anti-oxyhemoglobin saturation change interference factor delta D red of the red light based on the delta 1 red and the delta 2 red; constructing an anti-oxyhemoglobin saturation change interference factor delta D infrared of the infrared light based on the delta 1 infrared and the delta 2 infrared; and S4, calculating the relative blood volume RBV based on the delta D red and the delta D infrared. The method has the advantage that accurate non-invasive monitoring of the relative blood volume is achieved.

Patient fluid management systems, particularly for use in treating patients at various stages of heart failure, are disclosed. Disclosed systems employ vascular dimension monitoring sensors to provide accurate, early, real-time estimation of circulating blood volume as an input metric to the system control, allowing for more accurate modulation of treatment based on the patient's current fluid volume state.

The present application provides a kind of optical signal detection and processing method and device, and the physiological signal of optical detection is obtained by detecting blood volume change in human tissue blood vessel through photoelectric sensor in the working process of optical equipment, it is characterized in that, the method includes the following steps in the computing module of the optical equipment: set a data buffer zone, the data buffer zone can store the physiological signal of optical detection of at least 3 predetermined time units;Acquisition and calculation step, the each DC component of the physiological signal of optical detection collected is stored in the data buffer zone, the variance of the value of the DC component is calculated, and the first waveform reference index value is obtained;Comparison step;The first waveform reference index value is compared with the pre-stored reference index value range;Determination step, if the first waveform reference index value is greater than the maximum value of the reference index value, then the signal of the output device is off;If the first waveform reference index value is not greater than the maximum value of the reference index value, continue to collect new physiological signal of optical detection, then the acquisition and calculation step is executed.

The utility model relates to a device for preparing platelet-rich plasma with less blood volume. The device comprises a preparation tube unit, an upper tube cover unit, an isolation unit and a lower tube cover unit, the platelet-rich plasma preparation device has the advantages that by changing the structure of the preparation tube unit, the platelet-rich plasma preparation device can be suitable for treatment of small animals or pets; the volume of blood contained in the preparation tube unit is reduced, so that the centrifugation time is shortened, and the risks of infection and blood coagulation are reduced; besides, after the blood is centrifugally separated, a lower tube cover unit is arranged and is in threaded connection with a preparation tube unit, so that the lower tube cover unit can be rotated to adjust the volume of a fourth cavity of the preparation tube unit, the buffy yellow layer by layer is positioned in a third cavity, and the plasma is completely positioned in a second cavity of the preparation tube unit; therefore, subsequent extraction by medical staff is facilitated.

The invention pertains to a device designed for non-invasive monitoring of blood pressure by measuring changes in blood volume within a subject's tissue. The device includes multiple light sources and photodiodes, organized into groups. Each group consists of at least one light source and multiple photodiodes placed at various distances from the light source. This configuration allows for the detection of reflected light that carries photoplethysmography (PPG) signals from different depths within the tissue. The device features a processing unit that processes the PPG signals to perform signal separation analysis, distinguishing the signals from various tissue depths. The processing unit also calculates pulse wave velocity (PWV) by examining the time difference between detections at photodiodes located at different distances. This PWV is subsequently used to estimate the subject's blood point pressure using a predetermined correlation between PWV and blood pressure.

The invention relates to the technical field of medical health, in particular to a method and system for predicting the risk of hypotension in dialysis, and the system comprises a data collection module which is used for obtaining the operation parameters of dialysis equipment and the physical sign parameters of a patient; the bidirectional coupling modeling module is used for constructing a bidirectional coupling model between the patient and the dialysis equipment based on the dialysis equipment operation parameters and the patient sign parameters; the closed-loop feature extraction module is used for evaluating closed-loop response feature parameters of the human body and dialysis equipment based on the bidirectional coupling model; the risk prediction module is used for constructing a hypotension risk prediction model based on the dynamic change of the closed-loop response characteristic parameters; and the risk early warning module is used for realizing real-time early warning of the hypotension risk in the dialysis process. According to the method, the accuracy and reliability of hypotension risk early warning are effectively improved by quantitatively describing the influence of abnormal operation of dialysis equipment on hemodynamics of a patient and disturbance feedback of blood volume change of the patient on an equipment fluid control loop.

The present application belongs to the field of intelligent medical treatment, and particularly relates to a method, device, medium and program product for predicting RMPP based on lung microvessel changes. The method comprises the following steps: S101: acquiring CT images of a pediatric MPP patient; S102: extracting the CT images to obtain quantitative PBV parameters, wherein the quantitative PBV parameters comprise BV10%, wherein BV10% refers to the percentage of blood volume in blood vessels with a cross-sectional area greater than 10 mm2 in total lung blood volume; and S103: if BV10% is higher than a first threshold value, determining that the pediatric MPP patient has a high risk of developing into RMPP, otherwise outputting a prediction result that the pediatric MPP patient has a low risk of developing into RMPP. The present application discovers the prediction effect of microvessel changes in CT on the occurrence and development of RMPP by quantitatively measuring the microvessel changes, realizes the clinical value of early diagnosis of RMPP, and thus drives early treatment in the clinic.

Systems, software and methods for non-invasively and adaptively generating synthetic microvascular networks are disclosed, including models that can be used for diagnostic assessments. An example computer implemented method includes: generating a model of a coronary vessel of a patient; generating, based on the 3D model, a myocardial blood volume (MBV) map of a region of interest perfused by the coronary vessel; determining, based on the MBV map, a blood volume for the region of interest; generating, based on the 3D model and the blood volume, an initial vascular network model using constraint constructive optimization; optimizing, based on the MBV map, geometric parameters of each segment of the initial vascular network model to generate a synthetic microvascular network model that further includes microvessels emanating from the coronary vessel to perfuse the region of interest; and generating, based on the synthetic microvascular network model, a diagnostic assessment of the region of interest.

The invention provides an in-aorta balloon counterpulsation system control method based on hemodynamics, and relates to the technical field of medical system control. According to the method provided by the invention, hemodynamic monitoring signals of a target user are obtained in real time, wherein the hemodynamic monitoring signals comprise the total heart end diastole volume, the rate of variation per stroke, extravascular lung water and the heart index; the basic counterpulsation blood volume of the target user is determined according to the volume of the full heart diastole; optimizing the basic counterpulsation blood volume according to the variation rate per stroke, the extravascular lung water and the heart index to obtain a target counterpulsation blood volume of the target user; according to the target counterpulsation blood volume of the target user, the balloon inflation volume of the balloon counterpulsation system in the aorta is determined. According to the method, accurate determination of the balloon inflation volume of the balloon counterpulsation system in the aorta can be achieved, the processing efficiency and accuracy are improved, and the use requirements of different users are met.

A method embodiment includes generating, via a sensor of a computing device, a signal representing vibrations originating from a blood vessel of a subject and decomposing the signal into one or more first intrinsic oscillatory modes and one or more second intrinsic oscillatory modes. The one or more first intrinsic oscillatory modes have respective oscillation frequencies that are less than respective oscillation frequencies of the one or more second intrinsic oscillatory modes. The method includes obtaining an intensity spectrum of the one or more first intrinsic oscillatory modes over a range of frequencies and using the obtained intensity spectrum to determine a blood volume status of the subject. Another method embodiment includes using the one or more second intrinsic oscillatory modes to determine one or more mechanical properties of the blood vessel or tissue adjacent to the blood vessel.

Disclosed are methods, materials and devices for approximation of blood volume in a fluid, such as in a biological fluid collected during a surgical procedure. The method and devices may include the use of an RBC flocculant, for example polyDADMAC, and an approximate blood hematocrit from the type of animal blood being evaluated, as well as a calculated RBC packing ratio corresponding to the collection device being used. Also provided is a Blood Indicator Panel (BIP), comprising a series of markings calculated from an observed red blood settlement volume, the average animal blood hematocrit, and a calculated RBC packing ratio “η” value for the collection device. A collection device with a BIP is disclosed. 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) collection containers are also disclosed, that include a RBC flocculant, for use in approximating blood volume in a fluid.