30 results about "Central venous pressure" patented technology

The invention provides an early-stage automatic identification method and system for acute kidney injury related to cardiac surgery, and relates to the technical field of physiological parameter detection. The method comprises the following steps: acquiring average arterial pressure, cardiac blood discharge volume, central venous pressure and blood oxygen saturation, regularly recording and extracting data of adjacent time points, calculating a variation range, screening a mutation region, judging whether a reference range is exceeded or not, analyzing a multi-parameter synchronous variation condition, and marking a hemodynamics abnormal state. According to the method, abnormal changes of hemodynamics and urine metabolism are accurately recognized through real-time monitoring and multi-parameter analysis, the urine flow rate and the metabolite excretion rate are combined, misjudgment of a single index is avoided, the fineness of renal function change analysis is improved, the high-risk time period is accurately positioned through time cross comparison, the diagnosis accuracy is improved, and the diagnosis accuracy is improved. Trend analysis and risk grade division enable the change of the illness state to be more visual, and a real-time early warning system effectively monitors the fluctuation trend, optimizes clinical management and improves the timeliness of medical response.

A catheter assembly or other elongate tubular device for use in establishing vascular or other access within the body of a patient is disclosed. The catheter assembly is equipped with one or more sensors that enable monitoring of one or more physiological aspects of the patient or physical aspect of the catheter assembly itself when the catheter assembly is disposed within the patient. Such aspects include central venous pressure, body temperature, ECG heart signals, oxygen levels, ultrasound data, glucose, etc. The catheter assembly includes the ability to wirelessly transmit or otherwise forward data relating to the detected physiological parameters to another location, such as a patient electronic medical record, smartphone or other mobile device, nurse station, etc. Catheter assemblies configured to detect the frequency of catheter flushing, flushing quality, etc., are also disclosed.

The application provides a central venous pressure monitoring horizontal positioning assembly, relates to the technical field of medical devices, and is used for improving the accuracy and reliability of measurement results. The central venous pressure monitoring horizontal positioning assembly comprises a transfusion rod, a locking piece, a support frame and a horizontal positioner. The transfusion rod comprises a rod body, a base and a plurality of rollers. The top end of the rod body is provided with a hook for hanging a transfusion bag. The base is arranged at the bottom end of the rod body. The plurality of rollers are arranged on the surface of the base away from the rod body. The locking piece is detachably connected with the rod body. The support frame is connected with one end of the locking piece. The support frame has a containing groove with a first opening and a second opening. The horizontal positioner is arranged in the containing groove. The horizontal positioner is provided with an infrared level meter. The light outlet end of the infrared level meter is opposite to the first opening. The connecting piece is connected with the horizontal positioner and opposite to the second opening. The connecting piece is provided with a clamping groove for clamping a pressure sensor.

The invention relates to a catheter assembly with a monitoring function. A catheter assembly or other elongate tubular device for establishing a vascular or other access within a body of a patient is provided. The catheter assembly is equipped with one or more sensors that allow monitoring one or more physiological aspects of the patient or physical aspects of the catheter assembly itself when the catheter assembly is disposed within the patient. Such aspects include central venous pressure, body temperature, ECG cardiac signals, oxygen content, ultrasound data, glucose, and the like. The catheter assembly has functionality for wirelessly transmitting or otherwise forwarding data related to the detected physiological parameter to another location, such as a patient electronic medical record, a smartphone or other mobile device, a nurse station, and the like. Catheter assemblies configured to detect catheter irrigation frequency, irrigation quality, and the like are also disclosed.

The application discloses a kind of multi-mode data fusion central venous catheter related thrombus early warning method and system.The method uses infusion pump flow rate step event as excitation signal, and the original sequence of pump end pressure and central venous pressure is synchronously collected;Through cross-correlation analysis, the pressure transmission time difference is calculated and time domain difference compensation is performed, and the net pressure difference sequence reflecting the characteristics of catheter body is generated.The core is to use the inherent mechanical peristalsis of pump as detection signal, decouple the net pressure difference sequence into average perfusion resistance value representing the macroscopic patency of catheter, and extract resistance normalized asymmetry representing the viscoelasticity of soft tissue at the end of catheter by period folding reconstruction.The system constructs two-dimensional orthogonal decision logic, realizes the accurate distinction and hierarchical early warning of safe patency, rigid mechanical obstruction and flexible valve fault state.The application can actively identify early occult thrombus valve characteristics without interrupting infusion or manual backflow.

1. The name of this design product: Peripherally inserted central venous catheter. 2. Purpose of the product with this design: Peripherally inserted central venous catheters are suitable for establishing short-term or long-term access from peripheral blood vessels into the central venous system for intravenous infusion and blood extraction, high-pressure injection of contrast agents and central venous pressure monitoring. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture. 5. Omit the left view and the right view.

Methods, systems, and computer-readable medium for determining a systemic vascular resistance (SVR), by receiving a systolic blood pressure (SBP) and a diastolic blood pressure (DBP) from one or more blood pressure devices, receiving a first bioimpedance from a first electrode and a second bioimpedance from a second electrode, determining a stroke volume based on a difference between the first bioimpedance and the second bioimpedance, determining a mean arterial pressure (MAP) based on the SBP and the DBP, receiving a heart rate, determining a cardiac output based on the heart rate and the stroke volume, determining a first value based on a right atrial pressure (RAP) or central venous pressure (CVP) and the map, determining a second value based on the first value and the cardiac output, and determining a SVR based on the second value and a factor.

Methods, systems, and computer-readable medium for determining a systemic vascular resistance (SVR), by receiving a systolic blood pressure (SBP) and a diastolic blood pressure (DPB) from a calibrated photoplethysmography (PPG) device, receiving a pulse transit time (PTT) from the PPG device, determining a stroke volume based on the PTT, determining a mean arterial pressure (MAP) based on the SBP and the DBP, receiving a heart rate, determining a cardiac output based on the heart rate and the stroke volume, determining a first value based on a right atrial pressure (RAP) or central venous pressure (CVP) and the map, determining a second value based on the first value and the cardiac output, and determining a SVR based on the second value and a factor.

The invention discloses a central vein thrombus monitoring and removing device, and relates to the technical field of thrombus monitoring, the central vein thrombus monitoring and removing device is composed of a monitoring module, an early warning module, a data analysis module and an interaction module, and the monitoring module comprises the following contents: an MEMS sensor is connected to a punctured catheter, and after calibration, the MEMS sensor is connected to the punctured catheter; the central venous pressure, the blood flow velocity and the blood concentration of a patient are monitored, data of the central venous pressure, the blood flow velocity and the blood concentration are recorded, whether an early warning numerical value is reached or not is determined during recording, if yes, an instruction is directly sent to an early warning module, and then the blood flow data are transmitted to a data analysis module and an interaction module; the data analysis module adopts staged data transmission and analysis, the change trend of blood flow data can be accurately captured, abnormal data can be marked and classified, meanwhile, risk factors of thrombus formation can be recognized by comparing and analyzing historical data, and a basis is provided for formulating a personalized treatment scheme.

The utility model discloses an auxiliary device for precisely measuring central venous pressure, and relates to the technical field of medical instruments. The auxiliary device for precisely measuring the central venous pressure comprises two groups of lifting rails which are formed by bending a steel plate into an S shape; the two ends of the positioning strip are in forward sliding connection with the two sets of lifting rails correspondingly, and the positioning strip is fixed to the specified height of the lifting rails through first positioning bolts; the lifting track is arranged to be connected with the positioning strip, the height of the positioning strip can be adjusted to be kept at the height of the axillary center line, the device can be suitable for patients of different figures to use, the height of a saline column in an infusion tube can be accurately measured in cooperation with scale marks, and then the venous pressure value is read; the lifting frame is matched with the positioning buckle, the upper end of the infusion tube can be clamped and lifted, a water column is observed through residual saline water in the infusion tube, the height is stable, one person can operate, other people do not need to hold the infusion tube by hand all the time to lift the infusion tube, the manpower requirement is lowered, the measurement error is reduced, and operation is convenient.

The utility model discloses a central venous pressure measuring device which comprises a measuring scale, scale marks and a fixing groove penetrating up and down are arranged on one end face of the measuring scale, a pressure measuring tube is arranged in the fixing groove, a three-way valve is arranged at the bottom end of the pressure measuring tube, an annular buckle is arranged on one side of the base, and the measuring scale is arranged on the other side of the base. The upper end of the measuring scale is hinged to the base, the lower end of the base is provided with a swing groove with the hinge point of the upper end as the circle center, the lower end of the measuring scale is provided with a screw, the screw is inserted into the swing groove in a swing mode, the screw is further in threaded connection with a nut blocking the outer side of the base, and the measuring scale and the base can be locked by screwing the nut; the upper end of the measuring scale is hinged to the base, and the swing groove in the lower end of the measuring scale takes the hinge point of the upper end as the circle center, so that the measuring scale can adaptively swing under the action of gravity when the nut is loosened, the measuring scale can be kept in a vertical state no matter whether an infusion rod used for fixing the device is in a vertical state or not, and the accuracy of a measured value is further ensured.

Apparatus and methods are described including reducing cardiac preload of a subject by partially occluding a vena cava of the subject at an infra-renal location. One or more physiological parameters of the subject are monitored, the one or more physiological parameters including lower body venous pressure, central venous pressure, central venous blood flow, renal venous pressure, cardiac diameter, cardiac volume, arterial pressure, and / or arterial blood flow. An extent to which the vena cava is occluded at the infra-renal location is modulated, responsively to the one or more physiological parameters. Other applications are also described.

The present invention is applicable to the technical field of medical devices and provides a device for real-time monitoring of central venous pressure; the central venous pressure device includes: a central venous catheter connector, one end of the central venous catheter connector is connected to a central venous catheter; an infusion tube; a fixing component, and there are three fixing components. In the present invention, the pressure sensor is manually operated to drive the rectangular frame into the central venous pressure sensor connector. When the surface of the pressure sensor contacts the inner surface of the central venous pressure sensor connector, the first spring will drive the conical block into the first through hole opened inside the rectangular frame to perform quick installation and automatic self-locking processing on the pressure sensor and the central venous pressure sensor connector, preventing the device from falling off due to external forces during use, thereby improving the installation portability and firmness of the product during actual use.

The utility model belongs to the technical field of medical supplies, and discloses a central venous pressure manometer which comprises an infusion bottle support, a measuring leveling ruler, a connecting clamping block and a pressure measuring tube, the measuring leveling ruler is movably connected to a vertical rod of the infusion bottle support through the connecting clamping block, one side of the connecting clamping block is vertically connected with a supporting shaft, and the other side of the connecting clamping block is connected with a pressure measuring tube. A positioning rod is rotatably arranged on the outer side of the supporting shaft, two blocking pieces are arranged at the positions, in the right-angle relation, of the side face of the connecting clamping block and located in the horizontal direction and the vertical direction of one side of the supporting shaft respectively, and the two ends of the pressure measuring pipe are fixedly communicated with a three-way connector and an exhaust hole connector respectively. The pressure measuring tube can be conveniently matched with the infusion bottle support and the measuring leveling ruler for use, the height of the measuring leveling ruler can be conveniently adjusted, the position of a measured central positioning point can be accurately positioned, the measuring accuracy is improved, the central venous pressure can be independently measured, the using process is simplified, and the environmental applicability is improved.

The utility model discloses a continuous central venous pressure and invasive blood pressure monitoring sensor fixing device, and particularly relates to the technical field of sensor fixing, which comprises a positioning piece installed at the top of a support plate and used for fixing a sensor, and an auxiliary piece used for adjusting the angle of the positioning piece is arranged outside the support plate; the positioning part comprises a fixed support installed at the top of the supporting plate, a movable shaft is rotationally connected into the fixed support, a through hole is formed in the outer portion of the movable shaft, a supporting shaft is installed in the through hole, clamping plates are arranged outside the two ends of the supporting shaft in a sleeving mode, and clamping grooves are formed in the sides, away from each other, of the top ends of the two clamping plates. According to the utility model, through the flexibility of the first spring, the two clamping plates can be shifted inwards to adjust the distance, the effect that the clamping plates are staggered with the sensor and are convenient to detach is realized, then the clamping plates are pushed to move outwards through the resilience force of the first spring, and the sensor is limited and fixed through the external thrust force of the clamping plates, so that the effect of conveniently detaching the sensor is realized.

The utility model discloses a manual central venous pressure measuring device which is divided into two channels, one channel is an infusion bottle connector used for being connected with an infusion bottle, the other channel is a normal saline bottle connector used for being connected with normal saline for measuring pressure, and the channels on the two sides exhaust air. And the other end of the device is a positive pressure connector connected with a central venous catheter. In the device, an infusion bottle joint and a normal saline bottle joint form a Y-shaped connecting structure, and a monitoring channel exhaust pipe is arranged at the lower end of the Y-shaped structure; the lower end of the exhaust pipe of the monitoring channel is a pressure measuring pipe with scales, and the lower end of the pressure measuring pipe is provided with a pre-charging interface; an infusion dripping speed adjusting switch is arranged at the lower end of the infusion bottle connector; a water stop clamp A is arranged at the lower end of the normal saline bottle joint; a water stop clamp B is arranged at the lower end of the monitoring channel exhaust pipe. The device has the advantages that the operation of measuring the central venous pressure and the infusion treatment function are achieved at the same time, the device is economical and easy and convenient to operate, and the device can be used for measuring the central venous pressure as long as the central venous catheterization technology is adopted.

The invention discloses a central venous pressure variability analysis method and device, terminal equipment and a storage medium, relates to the technical field of biomedical engineering, and aims to solve the problem that a measurement result of the central venous pressure variability is influenced by respiratory cycle fluctuation. The method comprises the following steps: collecting a light intensity attenuation signal when near-infrared light passes through human tissue; preprocessing the light intensity attenuation signal to obtain a pure light signal; providing a findpeaks algorithm, analyzing the pure light signal by using the findpeaks algorithm to obtain a wave crest of the pure light signal, and defining an effective breathing cycle according to the wave crest; the findpeak valley intensity difference value of the maximum peak and the maximum trough of the pure optical signal in an effective breathing cycle is analyzed through the findpeak algorithm, and the central venous pressure variability is calculated according to the light peak valley intensity difference value.

The invention relates to the technical field of bleeding amount monitoring, in particular to an intelligent information acquisition and storage system in general surgery, comprising: a first information processing module for determining a hemodynamic correction factor according to the blood flow thrust intensity and blood flow pulsation intensity of a target object in general surgery; the second information processing module is used for determining a tissue perfusion correction factor according to the oxyhemoglobin saturation and the central venous pressure of the target object; the instantaneous bleeding intensity quantification module is used for determining the instantaneous bleeding intensity according to the instantaneous bleeding amount of the target object, the hemodynamic correction factor and the tissue perfusion correction factor; the hemostasis efficiency quantification module is used for determining the hemostasis efficiency according to the effective energy of the hemostasis instrument, the fluctuation degree of the output energy of the hemostasis instrument and the instantaneous bleeding intensity; and the storage module is used for predicting a bleeding early warning index in the general surgery at least according to the hemostasis efficiency and the instantaneous bleeding intensity and storing the bleeding early warning index. According to the invention, early warning can be effectively carried out on bleeding conditions.

This invention relates to a method and system for non-invasively monitoring central venous pressure, using a set of microneedles and micro-electromechanical systems, e.g., in heart failure. Herein, the microneedle-based sensor attaches to the skin at the neck of a subject to monitor central venous pressure, as it is a direct representative of filling pressures causing skin sub-surface strain.

The present invention relates to methods and systems for non-invasive monitoring of central venous pressure using a set of microneedles and microelectromechanical systems, such as for heart failure. Herein, a microneedle-based sensor is attached to the skin at the neck of the subject to monitor central venous pressure because the central venous pressure is a direct indicator reflecting the filling pressure resulting in subsurface strain of the skin.

A computer system and a computer readable medium are disclosed that are configured to perform and store a computer-implemented method for reducing acute kidney injury during cardiac surgery. The method includes measuring and recording mean arterial pressure (MAP) and central venous pressure (CVP); storing the MAP and CVP data as a raw data series; preprocessing the raw data series as preprocessed data, the preprocessing including one or more of managing artifacts, outliers and missing data; assessing the preprocessed data using a first pressure window across a MAP data range and a second pressure window across a CVP data range; simultaneously tracking a number of minutes within each MAP data range window and within each CVP data range window; determining an outcome of the cardiac surgery; and processing a number of minutes within MAP windows, CVP windows for outcomes to reduce kidney injury.

This invention discloses a parameter identification method for a lumped parameter model of systemic circulation, belonging to the field of lumped parameter model technology. The method includes: constructing the state equation of the lumped parameter model of systemic circulation based on Kirchhoff's voltage and current laws to obtain the systemic circulation control equation; calculating the duration ratio of systolic to diastolic phases and stroke volume based on routine clinical measurement data, constructing classic aortic pressure and flow waveforms, and performing registration processing; calculating central venous pressure and flow based on routine clinical measurement data; and using the registered aortic inlet pressure and flow, central venous pressure and flow, and systemic circulation control equations to calculate the values ​​of each parameter in the parameter model. This invention, by periodically stretching the classic reference waveform, matches the waveform extreme values ​​with the patient's measured blood pressure and cardiac output, indirectly reconstructing the aortic inlet pressure and flow curve reflecting individual characteristics under non-invasive conditions, significantly improving the model's individualization and clinical compatibility.

The utility model provides a central venous pressure measuring device, which belongs to the field of medical machinery and comprises a saline bag, a main pipeline, a water delivery pipe section, an air inlet pipe section and an exhaust pipe section, the first end of the main pipeline is used for being detachably connected with a central venous catheter, and a scale identification layer is arranged on the middle pipe section of the main pipeline; one end of the water conveying pipe section is fixed and communicated with the second end of the main pipeline, and the other end of the water conveying pipe section is detachably connected with the saline bag; one end of the air inlet pipe section is fixed and communicated with the second end of the main pipeline; one end of the exhaust pipe section is fixed and communicated with the main pipeline, and the other end of the exhaust pipe section is arranged close to the first end of the main pipeline. The utility model has the beneficial effects that the main pipeline, the water delivery pipe section, the exhaust pipe section, the air inlet pipe section and the scale identification layer are designed into a whole, two infusion pipes and one graduated scale in the prior art are replaced, the steps of connecting a tee joint with each component and installing the main pipeline on the graduated scale are omitted, the connection is convenient, and the efficiency is high.

The invention relates to the technical field of central venous pressure testing, in particular to a central venous pressure monitoring system and method. The central venous pressure monitoring system comprises an infusion bag, a pressurizing bag, an infusion tube, a pressurizing tube, a first pressure testing element, a second pressure testing element, a three-way element, a four-way element, a central venous puncture catheter and testing equipment, the first pressure testing element and the second pressure testing element are fixed to the left end and the right end, flush with the fourth rib, of the midaxillary line of the human body, and the first pressure testing element is located on the right side of the human body. The first pressure testing element, the second pressure testing element, the first flow controller and the second flow controller are all in communication connection with the testing equipment; and the test equipment obtains the central venous pressure through a formula Po = R * P2 + (1-R) * P1. According to the technical scheme, the pressure measuring process is simple, the labor cost is reduced, and the use experience feeling of a patient is improved.

A system comprising a multi-sensor catheter for monitoring a cardiac hemodynamic condition, e.g. heart failure. The multi-sensor catheter comprises multi-lumen catheter tubing, first and second optical pressure sensors, and respective optical fibers and connectors. For right heart and pulmonary artery catheterization, a flow-directed multi-sensor catheter comprises a guidewire lumen, inflatable balloon tip, and sensor locations are configured for placement of a sensor in each of the right atrium and pulmonary artery, for measurement of central venous pressure in the right atrium and a pulmonary artery pressure. An optical fiber for oximetry may be included. The outside diameter is small enough for insertion through a vein of the arm. For monitoring of a cardiac shunt, sensors are configured for measuring pressures upstream and downstream of the cardiac shunt, e.g. in left and right atria, or left atrium and coronary sinus.

The utility model relates to the technical field of storage devices, in particular to a triple pressure measurement fixing device applied to cardiac surgery anesthesia, which comprises three shells connected in sequence, and storage assemblies for storing fixed arterial pressure, pulmonary arterial pressure and central venous pressure measurement leads are respectively arranged in the three shells; the distance between the adjacent shells is adjustable; by adjusting the distance between the adjacent shells, the distance between the three wires can be changed according to operation requirements, mutual winding of the three wires is avoided, the wires can be shrunk or released by rotating the storage rod, medical staff can adjust the length of the wires according to actual conditions, and the situation that the wires are too long or too short, and operation is affected is avoided.

The invention relates to the field of biomedical engineering technology and information processing, and discloses a trend prediction method and system based on multi-physiological signal fusion, a terminal and a storage medium, and the method comprises the steps: obtaining a venous pressure analog signal collected by a sensor or a radar, and carrying out the automatic calibration and digital processing of the venous pressure analog signal, obtaining central venous pressure data; processing the central venous pressure data based on a waveform feature automatic deconstruction algorithm to obtain hemodynamic feature parameters; and predicting the hemodynamic characteristic parameters according to a preset clinical knowledge rule to obtain clinical decision prompt information. According to the central venous pressure monitoring system and method, intelligent analysis and fusion prediction are conducted on the continuously-collected venous pressure signals, hierarchical clinical decision prompt information is obtained, and the automation, continuity and clinical decision support capacity of central venous pressure monitoring are greatly improved.

The invention discloses an improved anti-backflow peripherally inserted central venous catheter, which relates to the technical field of medical devices, including an extension pipe joint, an extension pipe, a connecting seat and a PICC catheter that are connected in sequence; a diversion valve, a silicone pad and an anti-backflow valve made of silicone are arranged in sequence in the extension pipe joint; an injector is inserted into the liquid inlet and the head of the diversion valve is pushed into the liquid control incision, so that the anti-backflow valve can be opened to form an infusion channel, thereby realizing infusion, blood transfusion and central venous pressure monitoring; when the injector is withdrawn, the silicone pad resets with its own elastic force to push the head of the diversion valve out of the liquid control incision, and the anti-backflow valve automatically closes the liquid control incision with its own elastic force to prevent blood backflow; it can effectively prevent blood backflow, reduce the risk of thrombosis in the infusion channel, and at the same time, the central venous pressure monitoring is supported by connecting the pressure measuring instrument through the diversion valve, thereby improving the applicability and safety of the central venous catheter; it solves the problem that the existing central venous catheter cannot take into account both blood backflow protection and central venous pressure monitoring.

The utility model discloses a split type measuring scale for measuring central venous pressure, which belongs to the technical field of medical instruments and comprises a fixing seat arranged on a rod body of an infusion support and a measuring scale body matched with the fixing seat in an inserted connection mode, a groove used for placing an infusion tube is arranged in the center of the measuring scale body, the groove extends along the length direction of the measuring scale body, and the measuring scale body is arranged in the groove. Scale marks are arranged on one side of the groove, a fixed buckle is arranged at the top end of the groove, and a movable buckle is connected into the groove in a sliding mode. According to the utility model, the split-type fixing seat and the measuring scale are adopted, so that on one hand, good operation convenience is provided, and on the other hand, the accuracy of measurement and reading can be ensured.

A system for estimating a central venous pressure (CVP) of a patient includes a sensor array configured to (1) emit light toward a target vein in the patient, and (2) capture non- invasive measurements. The non-invasive measurements includes an amount of the light that interacts with blood in the target vein. The system also includes a holder configured to hold the sensor array in contact with skin of the patient over the target vein. The system also includes a computing system configured to receive the non-invasive measurements from the sensor array, generate a waveform based upon the non-invasive measurements, identify an artifact in the waveform, determine a pulse transit time (PTT) of the blood in the target vein based upon the waveform, determine a venous pulse wave velocity (PWV) based upon the PTT, and determine the CVP of the patient based upon the venous PWV.