114 results about "Intra arterial" patented technology

Systems and methods of facilitating determination of risk of coronary artery disease (CAD) based at least in part on one or more measurements derived from non-invasive medical image analysis. The methods can include accessing a non-invasive generated medical image, identifying one or more arteries, identifying, regions of plaque within an artery, analyzing the regions of plaque to identify low density non-calcified plaque, non-calcified plaque, or calcified plaque based at least in part on density, determining a distance from identified regions of low density non-calcified plaque to one or more of a lumen wall or vessel wall, determining embeddedness of the regions of low density non-calcified plaque by one or more of non-calcified plaque or calcified plaque, determining a shape of the more regions of low density non-calcified plaque, and generating a display of the analysis to facilitate determination of one or more of a risk of CAD of the subject.

Systems and methods of facilitating determination of risk of coronary artery disease (CAD) based at least in part on one or more measurements derived from non-invasive medical image analysis. The methods can include accessing a non-invasive generated medical image, identifying one or more arteries, identifying, regions of plaque within an artery, analyzing the regions of plaque to identify low density non-calcified plaque, non-calcified plaque, or calcified plaque based at least in part on density, determining a distance from identified regions of low density non-calcified plaque to one or more of a lumen wall or vessel wall, determining embeddedness of the regions of low density non-calcified plaque by one or more of non-calcified plaque or calcified plaque, determining a shape of the more regions of low density non-calcified plaque, and generating a display of the analysis to facilitate determination of one or more of a risk of CAD of the subject.

The invention provides a balloon biopsy catheter in a pulmonary artery, and belongs to the technical field of balloon biopsy catheters. Comprising a catheter body, a working channel opening is formed in the end of one side of the catheter body, an air bag ventilation connecting opening is formed in the end of the side, close to the working channel opening, of the catheter body, a freezing probe body is installed in the catheter body, and a needle core body is installed in the freezing probe body. By arranging the limiting storage mechanism, the catheter body can pass through a zigzag path of a pulmonary artery, and the inflatable air bag body and the air bag inner bag which are installed at the end of one side of the catheter body are inflated after reaching an occupying lesion position, so that the end part of the catheter body can be quickly fixed; therefore, the position of the end of the catheter body is kept stable in the operation process, the freezing probe body and the needle core body are used in cooperation with the balloon catheter, and biopsy sampling is conducted after the air bag body and the air bag inner bag are fixed.

Some disclosed blood pressure estimation methods involve controlling, by a control system, an ultrasonic sensor system to transmit ultrasonic waves to a target object on an outer surface of an apparatus, the ultrasonic sensor system having M ultrasonic receiver elements in a single array. Some such methods involve receiving, by the control system from the ultrasonic sensor system, ultrasonic receiver signals from each of a plurality of the M ultrasonic receiver elements in the single array, the ultrasonic receiver signals corresponding to ultrasonic waves reflected from the target object. Some such methods involve detecting, by the control system, an artery within the target object based on the ultrasonic receiver signals. Some such methods involve estimating, by the control system, a blood pressure within the artery based on the ultrasonic receiver signals.

The invention provides an auxiliary device for arteriopuncture positioning, and relates to the technical field of arteriopuncture, the auxiliary device for arteriopuncture positioning comprises a mounting part and an ultrasonic probe body, a patient places an arm on a placing plate, and the placing plate is adjusted to a proper angle through an adjusting part, so that the comfort of the patient is improved; the arm of a patient is fixed to the placing plate through the fixing part, the fixing plate is driven by the adjusting part to move downwards, the ultrasonic probe body can move along with the placing plate until the ultrasonic probe body makes contact with the arm of the patient, the driving part can drive the placing plate to horizontally move, and when the placing plate horizontally moves, the arm can move along with the placing plate; when the arm moves, the ultrasonic probe body can scan the artery of the arm and adjust the position of the puncture part, and a medical worker can puncture the puncture needle into the artery through the puncture part, so that puncture work can be conveniently completed, puncture errors of the medical worker are effectively prevented, and the success rate of puncture is increased.

An example of a digital artery blood pressure monitor may include a tactile sensor array disposed on an inner surface of a cuff, the tactile sensor array including a plurality of capacitive sensors to detect pressure changes within a digital artery of a finger due to blood flow, where the pressure changes cause changes to capacitance values of one or more capacitive sensors of the tactile sensor array, and control circuitry coupled to the tactile sensor array to receive the capacitance values from the tactile sensor array, and determine a blood pressure based on the capacitance values.

The invention belongs to the technical field of intravascular stents, and particularly discloses a degradable peripheral artery stent, the cross section of the degradable peripheral artery stent is of an annular structure, the degradable peripheral artery stent is applied to the peripheral artery of the human body and comprises a plurality of supporting units and connecting units in the axial direction of the stent, the connecting units are located between the supporting units, and the adjacent supporting units are connected through the connecting units; the supporting unit comprises an end supporting unit and a middle supporting unit, and the end supporting unit and the middle supporting unit are each of a closed-loop structure formed by intersecting a sine-like curve and a reverse sine-like curve. The stent is integrally formed through a 3D printing technology, and is high in structural stability and good in flexibility. According to the degradable peripheral artery stent of the structure, degradable polylactic acid is adopted as a stent material, inflammatory reaction caused by the fact that the stent exists in blood vessels for a long time is greatly avoided, and the stent has good flexibility and adherence performance under the condition that the stent has enough radial supporting force; and the risk of restenosis after the stent operation is reduced.

The invention relates to a double-cavity micro catheter capable of controlling a guide wire angle in a coronary artery. Belongs to the technical field of medical instruments. The problems that when coronary artery bifurcation lesion is treated at present, especially when a bifurcation angle is an obtuse angle, a guide wire is difficult to pass through, operation is complex, and experience of an operator is relied on are solved. A first tube cavity and a second tube cavity which are independent are arranged in the micro-catheter body; the near end of the first tube cavity is communicated with the connector, the far end is provided with a far port formed in the tube wall, and the near side is provided with a through hole. A guide wire restraining piece is fixed to the outer wall of the micro catheter body, and the guide wire restraining piece and the catheter wall jointly define a guide wire restraining channel communicated with the far end opening and the through hole. The second tube cavity is provided with an inlet hole in the side wall and an outlet hole in the far end face. The guide wire restraining piece can be an elastic film, and two ends are fixed through fixing rings. Developing marks can be arranged near the through holes. A guide wire penetrating out of the far end opening is physically restrained and guided to turn through the guide wire restraining channel, so that the guide wire is stably and accurately guided into a target side branch blood vessel at a set angle through the through hole, and the operation success rate and safety are remarkably improved.

The invention discloses a method, a device, equipment and a product for positioning the position of a balloon in an aorta, and the method comprises the steps: building a blood conduction distance model which is used for representing the corresponding relation between the blood conduction distance and the blood conduction time and the systolic pressure value of the position of the balloon; an electrocardio waveform signal and a blood pressure waveform signal of the position where the balloon is located are obtained, and blood conduction time is calculated; determining a blood conduction distance by using a blood conduction distance model according to the calculated blood conduction time and the acquired systolic pressure value; and determining the position of the balloon in the aorta according to the blood conduction distance. According to the method, the position of the balloon in the aorta is determined by using the blood conduction distance model based on the electrocardiogram waveform signal and the blood pressure waveform signal, marking of the balloon in the artery and use of fluoroscopy equipment are not needed, dependence on experience of professional medical staff is greatly reduced, and the method has the advantages of being accurate in positioning, convenient to operate and wide in application range.

Some disclosed examples involve controlling, by a control system of an apparatus, a light source system of the apparatus to provide light to a target object on an outer surface of the apparatus and receiving, by the control system, ultrasonic receiver signals from each of a plurality of M ultrasonic receiver elements in a single array, the ultrasonic receiver signals corresponding to ultrasonic waves generated by the target object responsive to the light. Some disclosed examples involve detecting, by the control system, an artery within the target object based on the ultrasonic receiver signals and estimating, by the control system, a blood pressure within the artery based on the ultrasonic receiver signals.

The invention relates to the technical field of medical equipment, in particular to an intra-aorta balloon anti-bite pump control method, system and device, computer equipment and a storage medium. The method comprises the steps that in response to starting of target equipment, feature collection signals of a target object are obtained, and the feature collection signals comprise electrocardiosignals and blood pressure signals; determining a pressure control signal of the target equipment based on the blood pressure signal, wherein the pressure control signal comprises a peak blood pressure value when the target equipment is inflated and a minimum blood pressure value when the target equipment is deflated; determining a control time sequence signal of the target equipment based on the electrocardiosignal; and driving a pneumatic system of the target equipment based on the pressure control signal and the control time sequence signal so as to realize work control of the target equipment. By adopting the method, the control response efficiency and accuracy can be improved.

The invention relates to a medical first-aid instrument. The efficient bleeding stopping suite for the broken limb comprises an anastomosis cylinder and connecting assemblies arranged at the two ends of the anastomosis cylinder and used for being combined with the broken end. The center of the anastomosis cylinder is provided with a funnel-shaped center cone which is gradually shrunk towards the telecentric end, and the telecentric end of the center cone and the anastomosis cylinder are coaxially provided with a center cylinder; the central cylinder is communicated with the central cone, and a control valve is arranged on the central cylinder; an anastomosis needle used for being inserted into a broken limb artery is further arranged at the distal end of the center cylinder. Targeted rapid hemostasis can be effectively achieved on the whole, stable temporary blood supply is efficiently constructed, and the replanting survival rate of the fractured limbs is remarkably improved.

Essentially, the present invention comprises an assembly for transvascular stimulation from within an artery, enabling nerve stimulation to one or more regions of the autonomic nervous system around an artery by a bipolar guidewire having a distal end of a suitable shape, and this stimulation can be performed rapidly or for mapping purposes.

The utility model relates to the technical field of medical instruments, and discloses a carotid artery volume imaging isolation pad auxiliary support which comprises a neck supporting seat, a supporting frame is fixedly connected to the lower surface of the neck supporting seat, an angle adjusting assembly is arranged on the supporting frame, the angle adjusting assembly is used for adjusting the shape of the neck of a patient, and the angle adjusting assembly comprises an arc-shaped sliding groove rail. When the volume imaging device is used, the handle is manually rotated, and the handle can drive the movable headrest to move upwards through a series of operation of the transmission mechanism, so that the neck angle of a patient can be effectively adjusted, and the volume imaging device can better display the blood flow condition in the carotid artery; the appropriate angle can also enable the blood flow direction to be consistent with the ultrasonic beam direction, so that the blood flow speed and direction and whether abnormal blood flow exists or not can be evaluated more accurately, artifacts in an ultrasonic image caused by an improper neck angle are avoided, and the image effect of carotid artery volume imaging is improved to a certain extent.

The utility model provides a C-shaped curved stepped balloon catheter, which relates to the technical field of kidney intervention.The C-shaped curved stepped balloon catheter comprises a first balloon head end, the side end of the first balloon head end is integrally communicated with a concave bent wrinkled edge, and the side end of the concave bent wrinkled edge is integrally communicated with a second balloon tail end. In a non-working state, the wall of the balloon in the whole structure is folded to be in a straight column shape, a guide wire can conveniently pass through the balloon to reach a diseased region, in a working state, the whole balloon is in a C shape and is divided into two sections, the diameter of the head end of the first balloon ranges from 4 mm to 5 mm, the first balloon crosses an internal fistula anastomotic stoma to be placed in an artery, the diameter of the tail end of the second balloon ranges from 6 mm to be placed in a vein, and after the whole balloon is placed into a target lesion through the guide wire, the whole balloon is placed into the target lesion through the guide wire. The bending direction is adjusted, a pressure pump is connected, pressurization is conducted, the head end of the first balloon, the concave bending wrinkled edge and the tail end of the second balloon are expanded, arteries and veins with different inner diameters are expanded at the same time through radial force, and fracture caused by tearing of anastomotic stoma is avoided.

The present invention is related to a drug-coated covered stent the drug coated covered stent is a novel medical device designed to address Type III coronary artery perforations during percutaneous coronary intervention (PCI). This system combines a balloon-expandable stent covered with a biocompatible graft material and coated with cytotoxic drugs at its ends to prevent excess tissue growth and promote endothelialization. through a rapid exchange delivery system, the DCCS can be precisely positioned and expanded within the artery, sealing tears and promoting healing. The device's ultrathin profile and high flexibility enable navigation through tortuous vessels. Key components are a blocking balloon (201), second guidewire (203), covered stent (205), proximal and distal shafts of the delivery system (1, 2, 3, 15 4), stent (5), graft material (6), cytotoxic drug coatings (8, 9), and endothelialization (11). This innovative solution offers a promising approach to managing coronary artery perforations, potentially reducing the need for surgical interventions.

The application discloses an auxiliary instrument for aortic replacement artificial blood vessel surgery, which comprises a collapsible and inflatable bag body which extends into the aorta of a heart to block blood, wherein the bag body is provided with a bag body channel for blood to pass through, and the upper end of the bag body is connected with a drainage tube; the connection end of the drainage tube with the bag body is provided with a drainage tube cavity; the outer side of the drainage tube is provided with a drainage tube through hole for guiding the seepage blood between the bag body and the aorta of the heart into the drainage tube cavity; the drainage tube is respectively provided with a drainage tube channel which is communicated with the bag body channel and is used for sending the blood in the aorta of the heart into an extracorporeal circulation device, an injection channel which is used for injecting or extracting liquid or gas to the bag body so as to make the bag body inflate or shrink, and a seepage blood extraction channel which is used for extracting the seepage blood in the drainage tube cavity; the seepage blood is guided into the drainage tube cavity through the drainage tube through hole, and the seepage blood is extracted through the seepage blood extraction channel, so that the problem of the seepage blood blocking the suture visual field is solved.

The application provides a PPG baseline calibration method for a wearable continuous blood pressure monitoring device, which comprises the following steps: decoupling the relationship between contact pressure and infrared PPG baseline; since pressure is a scalar, the contact pressure change of the measured position can be equivalent to the opposite change of the hydrostatic pressure inside the artery; collecting infrared PPG waveforms under different hydrostatic pressures through two different height postures to model the relationship between contact pressure and PPG waveform, MLP modeling and the setting of a dual-wavelength calibrator; without affecting the extraction of blood pressure related features; enabling the existing blood pressure monitoring algorithm to achieve the A-class standard of BHS in long-term continuous monitoring; the method can be directly deployed in the existing blood pressure monitoring system without modifying the original blood pressure algorithm or model structure; the problem that PPG baseline drift occurs due to long-term wearing of the wearable device and thus continuous and accurate blood pressure monitoring cannot be achieved is solved; and more accurate continuous blood pressure monitoring can be achieved.

The application provides an interventional ventricular auxiliary oxygen generation device, a blood flow channel crosses an aortic valve into a left ventricle from an ascending aorta, a blood inlet of the blood flow channel is located in the left ventricle, a blood outlet is located in the ascending aorta, a first conveying pipe and a second conveying pipe convey hydrogen peroxide and catalase into the left ventricle to generate oxygen and water through reaction, and a pumping unit pumps oxygen-rich blood in the left ventricle to the ascending aorta. The oxygen generation function is added to the ventricular auxiliary device, the oxygen-rich blood in the ventricle is pumped to the ascending aorta through the ventricular auxiliary device, which directly improves the myocardial hypoxia condition and helps the heart recover, and on the other hand, the oxygen-rich blood is pumped into the ascending aorta and directly participates in the systemic circulation, thereby directly and quickly improving the oxygen supply condition of the systemic circulation.

Mechanical circulatory supports configured to operate in series with the native heart are disclosed. In an embodiment, a centrifugal pump is used. In an embodiment, inlet and outlet ports are connected into the aorta and blood flow is diverted through a lumen and a centrifugal pump between the inlet and outlet ports. The supports may create a pressure rise between about 40-80 mmHg, and maintain a flow rate of about 5 L / min. The support may be configured to be inserted in a collinear manner with the descending aorta. The support may be optimized to replicate naturally occurring vortex formation within the aorta. Diffusers of different dimensions and configurations, such as helical configuration, and / or the orientation of installation may be used to optimize vortex formation. The support may use an impeller which is electromagnetically suspended, stabilized, and rotated to pump blood.

The embodiment of the invention provides an in-aorta pressure reduction pump which comprises a diaphragm assembly capable of enabling liquid to flow in one direction and a pressure reduction pump, the pressure reduction pump is connected with the diaphragm assembly, and the flow directions of the pressure reduction pump and the diaphragm assembly are the same; the diaphragm assembly comprises a diaphragm body used for clamping the inner side of the aorta. In the direction of the axis of the diaphragm body, the outline of the pressure reduction pump is smaller than the size of the diaphragm body; the input end and the output end of the pressure reduction pump are located on the two sides of the plate face of the diaphragm body respectively. According to the technical scheme, the aorta is clamped through the diaphragm assembly, a buffer area can be formed outside the aortic valve, the buffer area can normally circulate during aorta ejection and is closed in the diastolic period, then a low-pressure area is formed in the buffer area in the diastolic period in a decompression pump extraction mode, the resistance of left ventricle ejection in the systolic period is reduced, and the cardiac effect is improved. And blood is prevented from flowing back through the incompletely closed aortic valve, so that the heart load is reduced, and the treatment effect is achieved.

An ischemic cardiopathy diagnosis assistance system includes pressure data acquisition means 11 for acquiring pressure data including proximal pressure Pa in a proximal stenotic segment A1 and distal pressure Pd in a distal stenotic segment A2; intracoronary electrocardiogram data acquisition means 12 for acquiring intracoronary electrocardiogram data made up of a local intracoronary artery electrocardiogram in a neighborhood of the distal stenotic segment; and computational processing means 14 for finding a pressure ratio Pa / Pd between the proximal pressure Pa and distal pressure Pd at a time suitable for diagnosis of ischemic cardiopathy based on these data. The computational processing means temporally associates the pressure data with the intracoronary electrocardiogram data, estimates an analysis period T during which vascular resistance remains stably low from a waveform of the intracoronary electrocardiogram data, and extract the pressure data of the analysis period T, and finds the pressure ratio Pa / Pd from the pressure data.

The invention discloses a central cavity management system, which is used for an in-aorta balloon counterpulsation pump, and comprises a regulation and control device group, a multi-channel data acquisition module and a main control module, wherein the multi-channel data acquisition module is used for acquiring monitoring data corresponding to a plurality of positions of a balloon counterpulsation pump in the aorta; and the main control module is used for acquiring abnormal data based on the monitoring data and controlling the regulation and control device group to execute corresponding actions on the balloon counterpulsation pump in the aorta based on the abnormal data so as to realize management of a central cavity of the balloon counterpulsation pump in the aorta. The monitoring data corresponding to the multiple positions of the balloon counterpulsation pump in the aorta are acquired through the multi-channel data acquisition module, so that the abnormal data of the positions of the balloon counterpulsation pump in the aorta are recognized through the multi-dimensional monitoring data, the abnormal state of the central cavity of the balloon counterpulsation pump in the aorta is recognized in an all-around mode, and the comprehensiveness of central cavity management is improved.

A method is provided to modulated vascular adaptation within a tumor so that therapy uptake is increased. The method includes providing a pressure directed therapy system having an infusion lumen, an occluder, a pressure sensor to sense pressure distal of the occluder. The distal end of the system is advanced to a target artery of an organ. The pressure in the target artery is reduced by expanding the occluder at the distal end of the system. Then, the therapy is infused through the infusion lumen and into the target artery. Upon sensing decreased pressure and thus vessel adaptation, infusion is stopped until vessel re-adaptation occurs. Then infusion resumes. The infusion continues in a cycle of therapy infusing, sensing pressure and determining vessel adaptation, waiting, and resuming once re-adaptation occurs until the therapy dose is delivered to the patient.

The present disclosure relates to ultrasonic catheters including vibration wires that are positionable in a retracted position and an extended position, and their methods of use. In operation, catheters according to the present disclosure are operable in an occlusion crossing mode, in which the catheter emits ultrasonic energy with the vibration wires in the retracted position and in an atherectomy mode, in which the catheter emits ultrasonic energy with the vibration wires in the extended position, causing the vibration wires to oscillate. The vibration wires may directly or indirectly engage plaque within an artery, causing the plaque to break free from the artery wall. The oscillation of the vibration wires may be less abrasive than conventional cutting elements used in atherectomy procedures, such that catheters according to the present disclosure may cause less trauma to artery walls as compared to conventional atherectomy devices.

The present system is directed in various embodiments to rotational atherectomy systems and methods generally. More specifically, a method for methodically softening and otherwise disrupting calcification located within atherosclerotic plaque, lesion or occlusion and / or within the wall of a biological conduit or lumen. The softening and / or disruption of the calcification in the walls of the exemplary artery is accomplished in conjunction with abrading removal of any occlusion located on the interior surface of the exemplary artery and, therefore, located within the artery's lumen. This result is achieved by use of at least one eccentric head that, during high-speed rotation within the exemplary lumen, has been found to produce a combination of a low-frequency orbital motion comprising a force that is exerted against the lumen wall, with concomitant deflection of same, and / or a high-frequency pulsatile frequency, also with concomitant exertion of force against the lumen wall and deflection of same.

Systems and methods of facilitating determination of risk of coronary artery disease (CAD) based at least in part on one or more measurements derived from non-invasive medical image analysis. The methods can include accessing a non-invasive generated medical image, identifying one or more arteries, identifying, regions of plaque within an artery, analyzing the regions of plaque to identify low density non-calcified plaque, non-calcified plaque, or calcified plaque based at least in part on density, determining a distance from identified regions of low density non-calcified plaque to one or more of a lumen wall or vessel wall, determining embeddedness of the regions of low density non-calcified plaque by one or more of non-calcified plaque or calcified plaque, determining a shape of the more regions of low density non-calcified plaque, and generating a display of the analysis to facilitate determination of one or more of a risk of CAD of the subject.

Described is a method and device for dilating a tubular anatomical structure. The device and method can be useful for extracting a blood clot in an artery of a mammal by concentrically irradiating an inner wall of the occluded artery using an ultraviolet (UV) laser beam delivered by an optical fiber. Dilation results from photophysical production and release of nitric oxide from the cells lining the arterial wall when UV laser light is projected as a ring beam onto the inner arterial wall.

The invention relates to the technical field of medical instruments, in particular to a common carotid artery piercing sheath with an inflatable balloon, which comprises a first catheter and a second catheter, the first catheter is communicated with the second catheter, and the first catheter is used for being inserted into an artery and used for guiding blood in the artery to enable the blood to flow into the second catheter; a limiting assembly is arranged on the outer side wall of the first catheter and is used for inserting the first catheter into a blood vessel and blocking and closing the blood vessel; the tail end of the second catheter is connected with an adjusting assembly, and the other end, away from the first catheter, of the second catheter is connected with an external conveying pipe. The air bag is divided into a plurality of independent inflation cavities by the diaphragms, and can be inflated and expanded in a partitioned mode in sequence, so that the air bag can adapt to the shape of a blood vessel, uniform sealing attached to the wall of the blood vessel is achieved, and local compression or incomplete sealing caused by deviation of the air bag is avoided; suddenly impact of one-time overall expansion of a traditional air bag on the blood vessel wall is avoided through partitioned inflation, and the risk of injury or spasm of the endangium is reduced.

Some disclosed examples involve controlling, by a control system of an apparatus, a light source system of the apparatus to provide light to a target object on an outer surface of the apparatus and receiving, by the control system, ultrasonic receiver signals from each of a plurality of M ultrasonic receiver elements in a single array, the ultrasonic receiver signals corresponding to ultrasonic waves generated by the target object responsive to the light. Some disclosed examples involve detecting, by the control system, an artery within the target object based on the ultrasonic receiver signals and estimating, by the control system, a blood pressure within the artery based on the ultrasonic receiver signals.