16 results about "Venous flow" patented technology

A device for establishing venous inflow to a blood reservoir of an extracorporeal blood circulation system includes a restricting unit for restricting a venous inflow line and a vacuum unit for supplying vacuum to the blood reservoir. The device includes a control unit that, upon setting the desired venous flow rate, automatically supplies a first actuating signal to the restricting unit for restricting venous inflow to the blood reservoir and supplies a second actuating signal to the vacuum unit for establishing a degree of vacuum within the blood reservoir, so as to achieve the set venous flow rate. The device includes a venous flow sensor.

The apparatus described is an inflatable constriction ring device to constrict the venous outflow from penis. The inflatable constriction ring is used in combination with vacuum erection device (VED), which induces erection and the ring constricts the venous outflow at the base of the penis to maintain erection.The distal end of constriction ring device is mountable on the proximal end of vacuum erection device to make a sealable contact with the vacuum erection device. The constriction ring is configured to make sealable contact with the user's skin around the penis thus creating an airtight system. The constriction ring is attached to the tubing of the inflation / deflation pump, which is used to inflate the constriction ring.

A shunt operable to be implanted on an eye is provided. The shunt includes a vein fluidic channel operable to be in fluid communication with an interior of the eye and operable to receive aqueous fluid from the interior of the eye. A body is fluidly coupled with the vein fluidic channel. A valve is disposed within the body and is operable to regulate intraocular pressure in the eye by opening and closing based on pressure from the aqueous fluid. A plurality of outlets are in fluid communication with the body opposite the vein fluidic channel in relation to the valve. The outlets are operable to release the aqueous fluid to the sclera of the eye.

A shunt operable to be implanted on an eye is provided. The shunt includes a vein fluidic channel operable to be in fluid communication with an interior of the eye and operable to receive aqueous fluid from the interior of the eye. A body is fluidly coupled with the vein fluidic channel. A valve is disposed within the body and is operable to regulate intraocular pressure in the eye by opening and closing based on pressure from the aqueous fluid. A plurality of outlets are in fluid communication with the body opposite the vein fluidic channel in relation to the valve. The outlets are operable to release the aqueous fluid to the sclera of the eye.

A system and method to evaluate a patient's brain condition by looking at venous outflow. The system and method may be computerized and automated. The process of the method identifies a paired set of venous structures to analyze, and then selects and identifies a mirrored pair of regions of interest on the structures and calculates the Hounsfield units for each of these mirrored pair of regions of interest of the paired venous structures. The process then calculates a ratio of the Hounsfield units of the mirrored pair of regions of interest. The process uses the calculated ratio to provide the clinician information on the condition on the brain tissue of the patient and to assess whether a large vessel occlusion actually exists.

The present invention relates to circulatory compression girdles for reducing mild or class I, moderate or class II, and severe or class III cellulitis that remain in a fixed position, thereby preventing unwanted slippage and compression. The lymphatic and venous systems thus benefit, providing an increase in the venous flow velocity and a decrease in the distension of the vein wall, venous hypertension of the lower extremities and symptoms of a swollen extremity, thereby favouring venous return and ultimately improving venous flow and return.

The utility model discloses an extracorporeal circulation blood path for hemodialysis and blood perfusion, which belongs to the technical field of medical instruments and comprises an arterial blood path and a venous blood path, and the arterial blood path comprises an aorta tube, a pump tube, an arterial pot inlet tube, an arterial pot outlet tube and an arterial pressure monitoring tube which are arranged along the flowing direction of arterial blood; the venous blood path comprises a venous pot inlet pipe, a venous pot outlet pipe, a hemodialyzer pipe and a venous pressure monitor which are arranged in the flowing direction of venous blood. The hemoperfusion device blood path comprises an artery connecting pipe, a vein connecting pipe, a waste liquid drainage pipe, an arteriovenous circulation pipe and a waste liquid bag connecting pipe. By means of the mode, connection needed by blood perfusion and connection needed by other blood purification modes (such as hemodialysis) are integrated together, medical staff do not need to splice various complex independent pipelines during operation, the operation process is simplified, and the hemodialysis efficiency is improved.

A system and method to evaluate a patient's brain condition by looking at venous outflow. The system and method may be computerized and automated. The process of the method identifies a paired set of venous structures to analyze, and then selects and identifies a mirrored pair of regions of interest on the structures and calculates the Hounsfield units for each of these mirrored pair of regions of interest of the paired venous structures. The process then calculates a ratio of the Hounsfield units of the mirrored pair of regions of interest. The process uses the calculated ratio to provide the clinician information on the condition on the brain tissue of the patient and to assess whether a large vessel occlusion actually exists.

An MRI image processing and analysis system may identify instances of structure in MRI flow data, e.g., coherency, derive contours and / or clinical markers based on the identified structures. The system may be remotely located from one or more MRI acquisition systems, and perform: error detection and / or correction on MRI data sets (e.g., phase error correction, phase aliasing, signal unwrapping, and / or on other artifacts); segmentation; visualization of flow (e.g., velocity, arterial versus venous flow, shunts) superimposed on anatomical structure, quantification; verification; and / or generation of patient specific 4-D flow protocols. A protected health information (PHI) service is provided which de-identifies medical study data and allows medical providers to control PHI data, and uploads the de-identified data to an analytics service provider (ASP) system. A web application is provided which merges the PHI data with the de-identified data while keeping control of the PHI data with the medical provider.

It is provided a device for establishing venous inflow to a blood reservoir of an extracorporeal blood circulation system including a venous inflow line from a patient to the blood reservoir and an arterial outflow line extending from the blood reservoir to the patient, the device comprising: a restricting unit configured for clamping the venous inflow line in order to act on a venous inflow amount to the blood reservoir in a range below a basic value, the basic value comprising a value established by gravitational conveyance while the venous inflow line is not restricted by the restricting unit; a vacuum unit configured for applying a vacuum to the blood reservoir in order to act on the venous inflow amount to the blood reservoir in a range above the basic value; a control device that includes a single operating element configured to establish both a degree of closure of the venous inflow line and an amount of vacuum in the blood reservoir for venous inflow to the blood reservoir at, above or below the basic value; and a venous flow sensor disposed on the venous inflow line and configured to measure a venous flow rate of blood circulating in the venous inflow line and to send a venous flow rate signal representing the venous flow rate to the control device; wherein the control device is configured to convert a setting carried out by a user by means of the single operating element into a corresponding actuation of the restricting unit or the vacuum unit causing a reduction of venous inflow below a gravitational amount by closing the venous inflow line, or alternatively, an increase above the gravitational amount in the venous inflow line by creating a vacuum in the blood reservoir 1; wherein the control device is configured to automatically adjust the restricting unit and / or the vacuum unit in response to the venous flow rate measured by the venous flow sensor.

A device for establishing venous inflow to a blood reservoir of an extracorporeal blood circulation system includes a restricting unit for restricting a venous inflow line and a vacuum unit for supplying vacuum to the blood reservoir. The device includes a control unit that, upon setting the desired venous flow rate, automatically supplies a first actuating signal to the restricting unit for restricting venous inflow to the blood reservoir and supplies a second actuating signal to the vacuum unit for establishing a degree of vacuum within the blood reservoir, so as to achieve the set venous flow rate. The device includes a venous flow sensor.

The invention belongs to the technical field of biomedical engineering and microfluidics, and particularly relates to an organoid-vascular system integrated development chip and a synchronous culture method thereof. The chip comprises an artery fluid channel, a vein fluid channel and at least one organoid culture unit connected between the artery fluid channel and the vein fluid channel, the organoid culture unit comprises a target organoid culture cavity and an artery / vein vessel organoid culture cavity which is communicated between the artery / vein channel and the target organoid culture cavity. According to the invention, a vascular organ is used as a vascular network hair growing center, is communicated with arteries / veins outwards under the guidance of a specific structure of the chip, and is integrated with a target organ inwards to form an artery-vascularized organ-vein structure. The method not only solves the problems of insufficient integration and asynchronous development of the organoid and the vascular system, but also has the research potential of high-throughput culture and multi-organ interaction, and provides a high-bionic in-vitro model for drug research and development and disease modeling.

The invention relates to the field of clinical medicine, and discloses a method for constructing a breast cancer postoperative upper limb edema prediction model based on ultrasonic scanning axillary arteriovenous flow. The method comprises the following steps: S1, collecting data; s2, measuring hemodynamic data; s3, calculating the upper limb venous return proportion PVR: calculating the upper limb venous return proportion PVR according to the ultrasonic measurement result obtained in S2, namely the ratio of axillary vein reflux to axillary artery reflux in unit time, drawing an ROC curve, calculating a Youden index, determining an optimal truncation point of the PVR, and dividing patients into two groups; s4, performing variable screening; s5, constructing a prediction model; and S6, prediction value analysis. The breast cancer postoperative upper limb edema prediction model constructed by the model construction method can effectively predict breast cancer postoperative upper limb edema of a subject, and is high in prediction efficiency, accurate in prediction result, wide in application range and low in cost.

A microfluidic chip for modelling flow through a vein includes a body including a microchannel extending between a fluid inlet and a fluid outlet, wherein at least a portion of the microchannel is coated with endothelial cells that form vascular lumen, and a venous valve formed in the body and positioned along the microchannel, wherein the venous valve includes a pair of leaflets defining a pair of cusps of the venous valve, and a flow channel positioned between the leaflets.

An intravenous (IV) fluid delivery system include an IV bag and a fluid delivery device. The IV bag is made of many fluidic channels that keep the fluid distributed across the bag such that the bag may be easily and comfortably wrapped around the arm and shoulder of a person. At least some of the fluidic channels have a slanted shape to maximize emptying the contents of the IV bag as the fluid is injected to the patient's vein. The system includes a pump that moves the fluid into a tube and a needle that is connected to a person's vein. The processor repeatedly turns the pump on or off to gradually transfer the fluid from the IV bag into the person's vein. The processor controls the delivery of the fluid based on the patient's biometric data and / or hand movements as measured by the fluid delivery device.

Various systems and methods are provided for treating pulmonary edema. In general, a pump can be configured to be implanted within a patient at risk of developing edema. The pump can be configured to pump fluid out of the patient's lungs, e.g., out of the patient's interstitial and alveolar spaces. The pump can be configured to be fully implanted within the patient's body. The pump can be configured to continuously pump fluid, or the pump can be configured to be selectively actuatable in response to a trigger event. In an exemplary embodiment, the pump can include an inflow port coupled to an inflow tube in fluid communication with a lymphatic vessel of the patient, and can include an outflow port coupled to an outflow tube in fluid communication with a vein of the patient.