24 results about "Heart.chambers" patented technology

A collapsible and expandable prosthetic mitral valve stent is provided with improved recapture into a distal lumen of a delivery sheath. Various embodiments comprise a valve support within the interior of a stent frame and defining a flow channel therethrough, wherein the top or upstream of the valve support comprises a row, or a plurality, of stent cells that are bent radially inward at least partially over the flow channel. Some embodiments may comprise a recapture assist mechanism, such as an open paddle, attached to one or more of the inwardly bent stent cells and adapted to receive and / or engage a wire to aid in positioning, expansion, recapture and / or implanting the device in a patient's heart chamber.

The application discloses an ultrasonic probe capable of directly reaching into a heart chamber in a heart operation and relates to the technical field of medical devices. The ultrasonic probe comprises a fixing frame arranged around the heart chamber, the fixing frame being connected with the skin of a patient; a telescopic rod being perpendicular to the fixing frame and being connected with the fixing frame through a spherical hinge, the telescopic rod being capable of extending into the heart chamber of the patient; an ultrasonic probe being arranged on the side wall of the end of the telescopic rod away from the fixing frame, the ultrasonic probe being arranged in the circumference of the telescopic rod, and the ultrasonic probe being provided with a plurality of ultrasonic probes; and a camera being arranged at the end of the telescopic rod away from the fixing frame. The length of the ultrasonic probe extending into the heart chamber of the patient can be changed through the arrangement of the telescopic rod, and the different heart chambers of different patients can be detected. The ultrasonic probe can be fixed on the skin of the patient through the arrangement of the fixing frame. The telescopic rod can be rotated according to the different positions of the diseased parts of different patients through the spherical hinge connection between the fixing frame and the telescopic rod, so that the ultrasonic probe can be in a better detection position.

The invention discloses a method for measuring the pressure in the heart cavity of a mouse, and relates to the technical field of experimental animal medical detection, and the method comprises the following steps: cutting an incision of about 1cm in the neck of the mouse; placing two sutures below the common carotid artery, and ligating the common carotid artery by using the suture at the distal end; the other section of suture line is placed in the middle of the right common carotid artery, the carotid artery is lifted up, the blood filling condition is observed, an opening is formed in the blood vessel, a pressure volume catheter is inserted, and meanwhile the suture line at the telecentric end is slightly pulled backwards to prevent bleeding; the pressure volume catheter is inserted into the left ventricle through the right common carotid artery, and the left ventricle pressure maximum rising rate and the left ventricle pressure maximum falling rate are collected. By means of the carotid artery approach, serious trauma caused by thoracotomy can be prevented, and the cardiac physiology can be possibly affected by the operation. Therefore, the carotid artery approach is more suitable for a long-time pressure collection experiment.

The invention discloses a scalpel facilitating waste discharge, and relates to the field of medical instruments. The scalpel facilitating waste discharge comprises a scalpel holder, an outer scalpel assembly and an inner scalpel assembly. The outer cutter assembly comprises an outer cutter pipe, an inner cavity, a waste containing opening, a waste discharging opening and a water spraying module. The inner knife assembly comprises an inner knife tube, a driving module, a first communicating port and a second communicating port; the inner cutter pipe can shield the waste containing opening or be separated from the waste containing opening in the sliding stroke of the inner cutter pipe, and when the inner cutter pipe shields the waste containing opening, the second communicating opening communicates with the waste discharging opening. According to the scalpel, cut tissue chips can be directly discharged from the waste discharge port, the whole scalpel does not need to be taken out, the operation efficiency is improved, and secondary injury to a patient can be prevented; meanwhile, before the scalpel extends into the body of a patient, air in the inner cavity can be emptied through normal saline sprayed out of the water spraying module, and air blockage caused by the fact that the air enters the ventricle is effectively prevented.

The invention discloses a processing method and device based on a heart three-dimensional image, equipment and a medium. The method comprises the following steps: acquiring a heart three-dimensional image and a chamber segmentation result to obtain a left ventricular heart cavity and a cardiac muscle; according to the inner diameter and the outer diameter of the myocardial, constructing a three-dimensional inner diameter curved surface and generating myocardial wall thickness mapping; determining a pre-trained classification model and constructing two-channel input of the classification model; inputting the curved surface and the mapping into a first channel of a model, and combining whole heart segmentation or original image data of a second channel; and processing dual-channel input through the model, and outputting a cardiomyopathy classification result. According to the method, a complete spatial form is reserved through the three-dimensional inner diameter curved surface and wall thickness mapping, and precise and robust classification of various cardiomyopathy such as hypertrophic cardiomyopathy and dilated cardiomyopathy is realized by combining dual-channel feature fusion and interactive calibration of a space guidance mask; the problems of efficiently and accurately extracting features from a complex three-dimensional heart image and automatically identifying diseases are solved.

Systems and methods are provided for treating conditions such as heart failure and / or pulmonary hypertension by at least partially occluding flow through the superior vena cava for an interval spanning multiple cardiac cycles. A catheter with an occlusion device is provided along with a controller that actuates a drive mechanism to provide at least partial occlusion of the patient's superior vena cava, which reduces cardiac filling pressures, and induces a favorable shift in the patient's Frank-Starling curve towards healthy heart functionality and improved cardiac performance. The system may include sensors to determine the degree of occlusion of the superior vena cava. The occlusion system may be used to reduce volume in a heart and facilitate a cardiac procedure. The occlusion system may be used to relieve an overloaded chamber during and / or after deploying a VAD.

An implantable assembly suitable for remodeling a chamber of a heart in a patient is disclosed. The assembly is implanted with a tool having a tool proximal portion and a distal portion. The assembly includes a mobile anchor including an abutment portion adapted to abut against a wall of the chamber of the heart and a tether portion rotatably coupled to the abutment portion. Each of the abutment portion and the tether portion are configured to be independently coupled from the tool. The assembly further includes an interventricular septum anchor for coupling to a septum of the heart and a tether having a working portion extending between the mobile anchor and the septum anchor having a first length and a tether proximal portion having a second length. The abutment portion is releasably locked to the tether portion and is configured such that a preselected torque applied to the tether portion of the mobile anchor unlocks and causes relative rotation of the tether portion relative to the abutment portion.

A dual-chamber leadless pacemaker (LP) system includes a first leadless pacemaker (LP1) and a second leadless pacemaker (LP2), wherein LP1 is configured to be implanted in or on a first heart chamber and deliver pacing pulses to the first heart chamber, and LP2 is configured to be implanted in or on a second heart chamber and deliver pacing pulses to the second heart chamber. Information is obtained regarding the amplitude of the pacing pulses delivered by LP2 to the second heart chamber and / or the sensitivity of a sensing circuit of LP1, which is configured to be used by LP1 to detect the inherent depolarization of the first heart chamber. A crosstalk protection duration is determined based on at least some of this information, such that it is performed for an appropriate duration when crosstalk protection is executed.

The application discloses a kind of near-field coherent heart radio frequency sensing method and system based on code division multiple access, comprising: 4-way frequency f synchronous baseband signal is configured, 4-way synchronous chip is configured, synchronous baseband signal is multiplied with corresponding synchronous chip to modulate, and 4-way digital baseband signal is obtained;4-way digital baseband signal is handled to obtain 4-way heart measurement signal;4-way heart measurement signal is respectively transmitted to corresponding antenna by radio frequency transceiver and is emitted;The antenna is respectively arranged in left ventricle, left atrium, right ventricle, right atrium;Antenna receives reflected signal, and is recorded as heart sensing signal;Heart sensing signal is transmitted to radio frequency transceiver, and after processing, the baseband signal containing heart chamber beat information is obtained;The baseband signal containing heart chamber beat information is multiplied with corresponding synchronous chip to demodulate, band-pass filter, and the demodulation signal corresponding to heart chamber beat information is obtained respectively.

The invention relates to a tool for sensing the depth of a catheter on a map. A system includes a display and a processor configured to receive an electroanatomical 3D map of a heart chamber to be projected and displayed on the display as a front view related to the view. The processor is further configured to: (i) receive position information of the catheter located within the heart chamber from the catheter positioning system, (ii) define a reference point position of the catheter displayed on the map, (iii) for any given viewing direction of the map, define the viewing direction as a ray superimposed on a vector from the virtual observer to the reference point position, and (iii) display the viewing direction on the virtual observer. (iv) calculating a view-dependent heart chamber distance between the distal wall position along the ray and the proximal wall position along the ray, (v) calculating a position of the reference point position on the ray relative to the heart chamber view-dependent distance based on the position information, and (vi) indicating the calculated reference point position distance to the user.

The invention relates to a hypertrophic myocardium excision device, belongs to the technical field of medical instruments, and aims to solve the problem that in the prior art, a tissue collection system is not integrated, so that excided tissue debris or myocardial tissue slice layers easily fall into a ventricle, and secondary injury is caused. The hypertrophic myocardial resection device comprises a resection gun body, a resection tube, a collecting mechanism and a driving mechanism, the resection tube, the collecting mechanism and the driving mechanism are all integrated on the resection gun body, and a doctor holds the resection gun body by hand and cooperates with a detection technology and a dynamic three-dimensional tissue mapping system to resection the hypertrophic myocardial. Precise adjustment of the stroke of the cutting tool bit is achieved by obtaining myocardial thickness data in real time, hypertrophic myocardium can be conveniently and rapidly cut, multiple cut diseased tissues can be independently collected, and later detection is facilitated.

Embodiments of delivery systems, devices and methods for delivering a prosthetic heart valve device to a heart chamber for expanded implementation are disclosed. More specifically, methods, systems and devices are disclosed for delivering a self-expanding prosthetic mitral valve device to the left atrium, with no engagement of the left ventricle, the native mitral valve leaflets or the annular tissue downstream of the upper annular surface during delivery, and in some embodiments with no engagement of the ventricle, mitral valve leaflets and / or annular tissue located downstream of the upper annular surface by the delivered, positioned and expanded prosthetic mitral valve device.

An access device for a heart chamber, a removable hemostatic valve unit, and a system including a cardiac assist unit are disclosed. In examples, the access device) includes an apical base plate and a sealing unit configured to provide a separation of a wet zone from a heart chamber and a dry zone with a gaseous environment outside of said heart chamber inside a patient body at the same time.

A medical system includes a device receptacle configured to hold an implantable medical device (IMD) (102) within a receptacle volume. The device receptacle is supported by a delivery catheter configured to position the device receptacle within an anatomical volume of a patient, such as a heart chamber. A device tether (120) including a conductive tether supports a tether head (128) configured to engage and / or disengage with the IMD. A tether electrode (129) is configured to receive an intrinsic electrical signal generated by a heart of the patient. The device tether is configured to use the conductive tether to conduct the intrinsic electrical signal from the tether electrode to processing circuitry outside of the patient's body.

The utility model provides a novel implantable defibrillation electrode balloon in the left ventricle, which is provided with a catheter, the front end of the catheter is provided with a balloon and an X-ray marking ring, the outside of the balloon is provided with eight platinum-iridium alloy strips, and the rear end of the catheter is provided with an external connector, a platinum-iridium alloy strip withdrawing button and a balloon inflation inlet. The platinum-iridium alloy strip is connected with a platinum-iridium alloy strip recovery button in the catheter, and a defibrillation electrode plate is arranged on the platinum-iridium alloy strip at the position of the balloon; when the device is used, the device is inserted into the heart of a human body through the catheter, the balloon is located at the left ventricle, then the balloon is inflated through the balloon inflation inlet, the balloon is expanded to enable the defibrillation electrode slices on the platinum-iridium alloy strip to be attached to the inner wall of the heart, the platinum-iridium alloy strip is locked, the button is withdrawn, the balloon is released, and the defibrillation electrode slices on the platinum-iridium alloy strip are defibrillated. And then a defibrillation signal is transmitted to the cardiac muscle through the defibrillation electrode slice, so that the heart contracts according to a normal rhythm, and defibrillation in the cardiac cavity has higher safety and more accurate pacing control capability.

The application belongs to the technical field of medical devices, and particularly relates to an artificial heart and a preparation method, an artificial heart device and a control method thereof. The myocardium of the artificial heart comprises a ring-shaped array of a plurality of hexagonal cavities forming a honeycomb structure. The artificial heart provided by the application has a bionic honeycomb structure, each hexagonal cavity can be filled with different volumes of gas, so that different shapes of heart chamber shapes can be simulated.

The invention is entitled "Propagation mapping of a heart chamber with regions exhibiting fragmented electrograms". The invention provides a method comprising storing an anatomical map of at least a portion of a surface of a heart. Storing respective electrogram (EGM) signal amplitudes measured at respective locations on the surface of the heart. Defining one or more first regions of the surface where the EGM signal amplitudes are fragmented and one or more second regions of the surface where the EGM signal amplitudes are non-fragmented based on the EGM signal amplitudes. Generating a first surface representation of the fragmented EGM signal amplitudes in the first regions. Extracting propagation times from the non-fragmented EGM signal amplitudes in the second regions and deriving a second surface representation of the propagation times. Presenting simultaneously the first and second surface representations of the respective first and second regions of the surface superimposed on the anatomical map.

Disclosed are devices, systems, and methods for in vivo monitoring of the flow of a biological fluid in an anatomic structure, such as blood flow through a heart valve (e.g., mitral valve, tricuspid valve, and / or aortic valve) or heart chamber. The disclosed devices, systems, and methods can continuously measure and evaluate blood flow forward and backward at an inlet of a heart valve for determination of heart function or dysfunction and / or in compilation with other monitored data that can be used to measure or predict secondary factors.

The invention belongs to the technical field of medical instruments, and particularly relates to an artificial heart, a preparation method thereof, an artificial heart device and a control method. The cardiac muscle of the artificial heart comprises an annular array which is of a honeycomb structure and composed of a plurality of hexagonal cavities. The artificial heart provided by the invention has a bionic honeycomb structure, and gases with different volumes can be introduced into the hexagonal chambers, so that the simulation of different shapes of heart atrioventricles is realized.

The application discloses a kind of cardioplegic solution perfusion monitoring device and monitoring method, it is related to medical instrument technical field.The device includes cardioplegic solution perfusion pipeline, cardioplegic solution backflow pipeline, membrane oxygenator, first detection sensor and second detection sensor;The input end of cardioplegic solution perfusion pipeline is suitable for being introduced into cardioplegic solution, and the output end of cardioplegic solution perfusion pipeline is suitable for being inserted in heart;The input end of cardioplegic solution backflow pipeline is suitable for being communicated with heart chamber;The output end of cardioplegic solution backflow pipeline is communicated with membrane oxygenator;First detection sensor is arranged on cardioplegic solution perfusion pipeline, and first detection sensor is used to detect the composition of cardioplegic solution transported to heart;Second detection sensor is arranged on cardioplegic solution backflow pipeline, and second detection sensor is used to detect the composition of cardioplegic solution extracted backflow by heart chamber.The application provides a kind of cardioplegic solution perfusion monitoring device and monitoring method, realizes the monitoring of cardioplegic solution composition, is helpful to improve myocardial protection effect and reduce the risk of postoperative complication of heart.

The application provides a system for constructing a heart chamber measurement model and a storage medium, and the heart chamber precision measurement model comprises an image segmentation and three-dimensional reconstruction module, a spatial distance calculation module, a dynamic function parameter evaluation module and a calcification artifact compensation module. The application breaks through the limitation of low accuracy of traditional static straight-line measurement, and through the image segmentation and three-dimensional reconstruction technology driven by deep learning, the model can realize sub-millimeter level measurement accuracy, and construct an accurate three-dimensional model of the heart chamber. The application can assist in the size selection and path planning of interventional instruments, thereby effectively improving the efficiency and safety of structural heart disease surgery.

An ultrasound diagnostic apparatus includes processing circuitry and a display. The processing circuitry is configured to concurrently obtain a plurality of cardiac function indexes for at least two or more cardiac chambers including a left ventricle and a right ventricle among cardiac chambers appearing on an apical 4-chamber moving image of a subject during one or more heartbeats, based on boundary positions of the cardiac chambers appearing on the apical 4-chamber moving image. The display displays at least one or more of the plurality of cardiac function indexes.