67 results about "Cardiac apex" patented technology

Apparatus and method for performing surgical procedures within the mediastinum and within the pericardium include an endoscopic cannula having a transparent tip, and an endoscope for introduction into the mediastinum and optionally into the pericardium via a single subxiphoid incision. A cavity may be initially dilated for advancing the endoscopic cannula using a dilating tool that exerts a lateral-expansive force against surrounding tissue for evaluating the endoscopic cannula to be introduced into the mediastinum. Other surgical instruments are positioned through the endoscopic cannula to cut a flap of the pericardium as an opening through which other surgical apparatus may be introduced. The endoscopic cannula may be swept around selected regions of the heart through an aperture near the apex of the heart to facilitate placement of epicardial tacks about regions of the heart.

Materials, devices and methods for the treatment of congestive heart failure are disclosed. In these methods, the volume of the left ventricle is reduced, thereby increasing the efficiency of the pumping action of the heart. Volume reduction is accomplished by introduction of biocompatible materials into the wall of the left ventricle, or into the ventricle itself. Also disclosed is a method for ventricular geometry reduction wherein flexible, elastic bands are attached to the external surface of the heart to affect a decrease in the volume of the left ventricle. Other disclosed devices include catheters and elastic bands that are usable in these treatments. Finally, disclosed is a device having an anchor disposed proximate the heart's apex, a plurality of petals, and a tensioning band secured to at least one of the petals.

The invention discloses an artificial tendon intervention apparatus comprising a head, a connecting tube and a control lever. An artificial tendon is connected with the head. The head is composed of a concave part and a convex part fastened together. The control lever allows the head to be opened or closed or released through a connecting rod. The head and the connecting tube partially enter the left ventricle through the cardiac apex and arrive at the proper position of the bicuspid valve; by regulating the control lever, the head is opened, closed or released; the head is connected with the artificial tendon; by adjusting the length of the artificial tendon, intervention of the artificial tendon is achieved. The artificial tendon intervention apparatus is simple in design and efficient and simple to operate, allows shorter surgical time, is good in repeatability and has promising clinical application prospect.

The invention belongs to the human body heart repairing technology and medical instrument field, and discloses a strut type bicuspid valve airbag closing plate obstruction body implanted through the cardiac apex, and an implantation method thereof; an airbag is arranged in the airbag closing plate; before implantation, a strut, a support framework and the airbag are compressed in a puncture conduit, and implanted along with the puncture conduit; after implantation, the airbag closing plate is inflated by air or fluid through an infusion tube, and is expanded to take position between two leaves of the heart bicuspid valve, thus obstructing a bicuspid valve countercurrent flow channel formed by pathology, and curing the bicuspid valve countercurrent flow; the airbag closing plate obstruction body is simple in structure, strong in reliability, very low in residual countercurrent flow incidence rate, and the implantation method has less wound on human body; the airbag closing plate obstruction body can treat functional bicuspid valve incomplete closure diseases, and the functional bicuspid valve countercurrent flow restoration success rate can be above 90%.

The invention discloses a left ventricle auxiliary blood pump, which comprises a cardiac apex sleevelet and a blood pump body fixedly connected with the cardiac apex sleevelet, wherein the cardiac apex sleevelet comprises a suture ring and a flexible skirt edge which is sleeved at the periphery of the suture ring; the suture ring comprises a suture ring inner hole and a convex edge which is convexly arranged in the radial direction; the blood pump body comprises an inlet pipe; the inlet pipe is convexly arranged on a rear cover of the blood pump body; a peripheral ring slot is formed between the convex edge and the flexible skirt edge; a sliding sheet which can only move in the radial direction relative to the blood pump body is arranged on the rear cover of the blood pump body and is stretched into the peripheral ring slot in a movable way; the convex edge is positioned between the sliding sheet and the bottom surface of a settling tank; and the cardiac apex sleevelet and the blood pump body are relatively axially fixed. In the invention, the sliding sheet is used for fixing the cardiac apex sleevelet and the blood pump, so that the cardiac apex sleevelet can be more conveniently and reliably connected with the blood pump; simultaneously, the axial dimension of the inlet pipe of the blood pump is reduced, so that the implantation of the left ventricle auxiliary blood pump in a pleural cavity is facilitated without damages to a diaphragm, and the success rate of a surgery is greatly improved.

With an ultrasonograph, medical information of a heart could not be accurately obtained as the cardiac apex of the heart could not be recorded clearly. A biomedical information measuring device capable of obtaining accurate medical information is created by measuring an apexcardiogram in M-mode using a linear probe, and improving a data processing device so as to establish an algorithm useful in accurate evaluation so as to solve the above problem.

A cardiac assist system using a helical arrangement of contractile bands and a helically-twisting cardiac assist device are disclosed. One embodiment discloses a cardiac assist system comprising at least one contractile elastic band helically arrangement around a periphery of a patient's heart, where upon an actuation the band contracts helically, thereby squeezing the heart and assisting the pumping function of the heart. Another embodiment discloses a helically twisting cardiac-apex assist device comprising an open, inverted, substantially conical chamber with two rotatable ring portions of different diameters located at the base and apex of the chamber, with a plurality of substantially helical connecting elements positioned substantially flush with the chamber wall and connecting the two rotatable ring portions, whereby a relative twisting motion of the two rings causes a change in volume of the chamber thereby assisting the cardiac pumping function.

The invention provides a liquid injection type cage ball aortic valve support system and belongs to the technical field of medical instruments. The liquid injection type cage ball aortic valve support system comprises a support body and a liquid injection ball. The system is delivered to the position of the aortic valve of a patient through a catheter after passing through the artery or the cardiac apex of the human body, so that the lesion aortic valve is substituted, and the system controls the blood to flow from the left ventricle to the artery blood vessel in one direction. The support body is divided into four sections which are the valve ring anchoring section, the ball cage section, the transitional section and the aorta anchoring section in sequence. The liquid injection ball moves in the ball cage section of the support body in a reciprocating mode, so that the function of blood one-way flow control is achieved. The liquid injection type cage ball aortic valve support system has the advantages that the system can be implanted into the human body through the catheter and circumferential leakage can be reduced in the valve closing process; the liquid injection ball is adopted in a valve support so that the function of blood one-way flow control can be achieved and the center backflow phenomenon generated when valve leaflets are folded can be eliminated; the force receiving state of the liquid injection ball is better than that of a triple lobe type valve and the service life can be prolonged.

The invention discloses an ultrasonic anti-thrombus magnetic suspension cardiac apex centrifugal pump. A stator iron core (22) and a stator winding (23) are arranged in the wall of a pump cylinder (2), and a rotor permanent magnet (21), a rotor radial suspension magnet (24) and a stator radial suspension magnetic ring (25) are arranged in a rotor cylinder (4). A flow guiding cone (26) is arrangedin the center of the rear wall of a blade shell (7), a mechanical fulcrum ball socket (15) is arranged at the top end of the flow guiding cone (26), a mechanical fulcrum ball (5) is arranged at the rear end of the rotor cylinder (4), and the mechanical fulcrum ball (5) and the mechanical fulcrum ball socket (15) form a mechanical fulcrum (8). A fulcrum clearance (16) communicates with a drug catheter (18) and a drug injection plunger (19) through a center hole (17). The drug injection plunger (19) is implanted below the abdominal wall skin to accept anticoagulant liquid medicine to enter the fulcrum clearance (16). The flow guiding cone (26) is internally provided with an ultrasonic transducer (20) which can generate ultrasonic vibration to be transmitted to a centrifugal impeller (27) through the mechanical fulcrum (8), and thrombosis is prevented from being formed on the surface of the centrifugal impeller (27) through the ultrasonic cleaning effect.

The invention relates to a valve clip and a clipping system thereof. The valve clip can be used for effectively treating MR (Mitral Regurgitation) and TR (Tricuspid Regurgitation) after being implanted into the human body by the clipping system. By using the valve clip, the axial operating space of the valve clip can be shortened, and the operating direction can be changed, so that the capturing and clamping operation can be performed from the other side of the valve (i.e., the atrium side) so as to reduce the injury damage on the atrium and the chordae tendineae in the surgical operation process; the length of the valve clip can be shortened, so that the implanted valve clip is shorter so as to reduce the space of the ventricle side occupied by the valve clip, reduce the injury capable ofbeing caused by the valve clip on the heart tissue, and reduce the thrombus forming risk; in addition, after the clipping system passes through the femoral vein and punctures the septum of the rightatrium and the left atrium, the right atrium and the left atrium are used as a delivery path of the clip; the intercostal incision and cardiac apex puncture are not needed; and the surgical trauma issmaller.

The invention discloses a cardiac apex exploration device used in cardiac operations in the technical field of medical equipment. The exploration device comprises two fine steel tubes, a fastener andtwo rotating illumination clamping devices, the middle parts of the outer walls of the two fine steel tubes are hinged together through the fastener, the two rotating illumination clamping devices arein threaded connection with the tops of the two fine steel tubes, and a hollow semicircular holding ring is in threaded connection with the bottom of each fine steel tube; the lower parts of the outer walls of the two thin steel tubes are connected through a telescopic wire in a penetrating mode, and a rechargeable battery is embedded in and clamped to the surface of any one hollow semicircular holding ring. The two fine steel tubes are clamped and loosened by means of the two hollow semicircular holding rings and the fastener, so that a light guide tube drives a rhombic block to conduct clamping; an electric push rod extends, so that light of a laser lamp is emitted out through the light guide tube, the position can be determined conveniently, and repeated exploration is achieved. The device is easy to operate, facilitates clamping, is convenient to fold, reduces the area of an affected part, and has wide market application prospects.

The invention provides a woven type volume reduction device which comprises a woven stent. The woven stent is formed by weaving shape memory alloy sutures in a net shape, and comprises a stent body located in the ventriculus sinister, a waist part penetrating through the cardiac apex and a lower disk face located outside the cardiac apex. The shape of the lower disc face is matched with the outer wall of the ventriculus sinister, the shape of the released stent body is matched with the inner wall of the ventriculus sinister, the side, far away from the cardiac apex, of the stent body is covered with a flow blocking film, an inner wall fixing structure is arranged on the side, far away from the cardiac apex, of the stent body in the circumferential direction, and the stent body is fixed to the inner wall of the ventriculus sinister through the inner wall fixing structure. The woven type volume reduction device improves stability and effectiveness, the volume reduction amount is adjustable, equipment loss and operation time are saved, use is easy and convenient, and popularization is easy.

The invention discloses a method for segmenting a blood pool in a diastasis image in a heart cardiac function magnetic resonance image. The method comprises obtaining heart magnetic resonance images I<NP> including several lamellas of the left ventricular myocardium and in different cardiac cycle phases; in the magnetic resonance image I<MP> corresponding to each cardiac cycle phase of the intermediate lamella, calculating the maximum-strength projection image of an initial region-of-interest in all cardiac cycle phases, carrying out cluster segmentation on the maximum-strength projection image, and selecting a region A with the biggest circular degree; calculating the image average gray value of the magnetic resonance image I<MP> corresponding to each cardiac cycle phase of the intermediate lamella in the region A, and making the magnetic resonance image I<MP> having the maximum average gray value be the magnetic resonance image I<MP(ED)> corresponding to the diastasis of the intermediate lamella; segmenting the magnetic resonance images of the lamellas from the intermediate lamella to the cardiac apex lamella and the cardiac base lamella, and completing segmentation of the blood pool in the magnetic resonance image I<NP(ED)> in the diastasis.

The invention provides a deep learning atrial septal defect detection method and device, and the method comprises the steps: obtaining an ultrasonic cardiogram, preprocessing the ultrasonic cardiogram, and extracting a region of interest; carrying out feature extraction on the region of interest, and identifying a subsword process atrial septal frontal section, a subsword process atrial septal sagittal section, a cardiac apex four-cavity cardiac tangent plane, a low-position paracarpal four-cavity cardiac tangent plane and a paracarpal aorta short-axis tangent plane; detecting the minimum distance point of the atrial septal defect; segmenting heart structures of a subsword atrial septal frontal section, a subsword atrial septal sagittal section, a cardiac apex four-cavity cardiac tangent plane, a low paracardial four-cavity cardiac tangent plane and a paracardial aorta minor axis section to obtain segmentation results, the heart structures including a left atrium, a right atrium, a left ventricle, a right ventricle, an aorta and pulmonary arteries; and according to the segmentation results, filtering the detected minimum distance point bounding box of the atrial septal defect, andtaking the filtered result as an atrial septal defect detection result.

The invention provides a left ventricle segmentation method and device and electronic equipment, and the method comprises the steps of obtaining cardiac medical image data; determining a cardiac apexposition and a cardiac base position in the medical image data according to the heart physiological structure characteristics; determining a left ventricular cavity segmentation result by adopting a region growing algorithm based on the cardiac apex position and the cardiac base position; according to the left ventricular cavity segmentation result, performing segmentation based on a level set algorithm to obtain a left myocardial segmentation result; and combining the left ventricular cavity segmentation result and the left myocardial segmentation result to obtain a left ventricular segmentation result. As the apex and the heart base are located in the ventricle, an accurate left ventricular cavity segmentation result can be obtained by adopting a region growing method based on the apex and the heart base, and due to the fact that the left ventricular cavity and the left myocardium are large in gray scale difference and obvious in gray scale gradient change, accurate left myocardium segmentation is conducted through a level set algorithm on the basis of the left ventricular cavity segmentation result, and the evolution speed is fast.

The invention provides an ascending aorta root intracavitary therapy training model, which comprises a heart model, a heart model fixing support frame and a liquid circulation system, wherein the heart model is provided with a heart body and an intervention entering device; the liquid circulation system is provided with an aorta model, a vein model and a pulsating pump; the intervention entering device comprises a silicone tube sleeve, a silicone tube and an extrusion part; one end of the silicone tube sleeve is a cardiac apex connecting end; a first intervention entering hole is formed in theend surface; the other end is provided with a silicone tube placing hole; internal screw threads are formed on the hole wall of the silicone tube placing hole; the extrusion part is connected with the silicone tube sleeve through screw threads; a second intervention entering hole is formed in the end surface of the extrusion part, so that the extrusion part can extrude a silicone tube when beingscrewed into the silicone tube sleeve, so that the tube hole of the silicone tube is closed; and the extrusion part enables the tube hole to recover the open state when being unscrewed from the silicone tube sleeve, so that a conveying system for intervention can reach an aortic valve model part sequentially through the second intervention entering hole, the tube hole of the silicone tube and thefirst intervention entering hole, so that medical personnel simulate interventional therapy operation training.

The invention discloses a method for identifying a heart status time phase. The method for identifying the time phase comprises the steps of inputting a three-dimensional heart image of any one phase to obtain the positions of the cardiac apex and the bicuspid valve of the left ventricular of the heart, obtaining a three-dimensional region according to the position information of the cardiac apex and the bicuspid valve, and determining the diastasis and the end-systole of the heartbeat cycle of the heart. The method for identifying the heart status time phase is capable of identifying the heart status time phase quickly, stably and accurately according to the gray-level distribution characteristic of the heart image, and the identification process of the method is simple and completely automatic.

The invention discloses a threaded fastening heart apex pad of a heart valve replacement prosthesis, and belongs to the field of medical instruments. The cardiac apex pad comprises a plugging disc body with a central through hole and a threaded locking nail with a central hole, and the central through hole of the plugging disc body comprises a tightening through hole defined by a plurality of conical studs and a tying rope used for penetrating through an inner support and an outer support in a heart valve replacement prosthesis. The threaded locking nail is matched with the multi-petal conical stud to achieve inward extrusion of the multi-petal conical stud, and clamping and fastening of the tether are completed. And a fixing pile with a hole for fixing the end part of the tether is arranged on the plugging disc body. According to the invention, the tether is fixed by means of threaded pressure application, deformation of the multi-petal conical stud, friction force and cross interlocking of materials, lossless extrusion and fastening of the tether are realized, and the device is simple, convenient and higher in safety. And through the arrangement of the fixing pile, the tail end of the tether can be knotted and fixed, the long-term use effect of tether fastening is guaranteed, complications can be prevented, and stability and reliability are high.

Disclosed are a transapically-implanted mitral valve flexible closure plate blocking body and an implantation method which belong to the technical field of human heart repair. A flexible closure plate (7) is implanted via a small incision on the left side of the chest, enters the left ventricle (3) via the cardiac apex (4), and is placed and fixed at a regurgitation gap position of the anterior and posterior leaflet junction (5) of the mitral valve (2). During diastoles, the mitral valve (2) opens, and blood flows from the left atrium (1) to the left ventricle (3) via two channels between the anterior and posterior leaflets (2.2, 2.3) and the closure plate (7). During systoles, the anterior and posterior leaflets (2.2, 2.3) close, the edges of the leaflets squeeze the closure plate (7) so that the plate deforms slightly, and the edges of the leaflets and the slightly deformed closure plate (7) are tightly bound together, thereby blocking a regurgitation gap of the mitral valve (2), and effectively preventing regurgitation of the mitral valve (2). The flexible closure plate blocking body is simple in structure and highly reliable, the implantation method thereof causes little trauma of the body, and the residual regurgitation rate is low. The present invention treats diseases such as functional mitral valve insufficiency, and the success rate for repairing functional mitral valve regurgitation is more than 90%.