220 results about "Left auricle" patented technology

Implantable occlusion devices that include one or more flanges extending from a tubular body are disclosed. The flange or flanges may assist in retention of the device within a vessel, cavity, appendage, etc. At least one flange on the occlusion device may include a concave surface proximate one end of a body. Because of the shape of the flange, e.g., its concavity, the occlusion device may resist dislocation due to e.g., the forces generated within the left atrial appendage during atrial filbrillation.

Devices, systems, and methods for closing the base of a left atrial appendage or other tissue structure comprise a device applicator having jaws, a shaft, and a handle. First and second triggers on a handle are configured to close the jaws and a closure device in a step-wise manner where tissue penetrating fasteners within the closure device are engaged by studs on the jaws, where the studs must be released prior to the opening of the jaws.

Methods and apparatus for closing a left atrial appendage are described. The methods rely on introducing a closure tool from a location beneath the rib cage, over an epicardial surface, and to the exterior of the left atrial appendage. The closure device may then be used to close the left atrial appendage, preferably at its base, by any one of a variety of techniques. A specific technique using graspers and a closing loop is illustrated.

A clamp is provided for attachment to the left atrial appendage (LAA). The clamp can be locked in a closed position so as to remain in place on the LAA. After being attached to the LAA, the clamp can be moved to a desired position such that the LAA can be retracted to a desired extent. The clamp can be held in any desired position, preferably by being connected to a thoracic retractor that is being used to retract the patient's sternum or ribs. A movable member is connected between the clamp and a stationary portion of the retractor. By locking the movable member in a fixed position relative to the stationary portion, the clamp can be maintained in a desired position and the LAA can be retracted as desired.

Some embodiments of the invention provide a system for occluding a left atrial appendage of a patient. Some embodiments of the system can include a ring occluder that can be positioned around the left atrial appendage and a ring applicator to position the ring occluder with respect to the left atrial appendage. One embodiment discloses a method of accessing endocardial surfaces of the heart through the atrial appendage. Additional embodiments of the invention provide a clip occluder that can be positioned around the left atrial appendage. A clip applicator can position the clip occluder with respect to the left atrial appendage.

The invention discloses a left auricle plugging device and a transport system. The left auricle plugging device comprises a stent and a plugging device body. Firstly, the stent is implanted and fixed on the left auricle inlet position, the double-tray-shaped plugging device body is released on the stent for plugging a left auricle, and therefore the problem of cerebral apoplexy caused by left auricle thrombus because of atrial fibrillation can be solved. The left auricle plugging device is provided with the self-expandable nitinol stent, the stent is firmly fixed on the left auricle inlet position by depending on anchoring thorns, and then the appropriate plugging device body is released on the stent. The transport system transports the left auricle plugging device to the left auricle position. Compared with the prior art, the stent is firstly fixed on the left auricle inlet position, then the double-tray-shaped plugging device body is released on the stent, and therefore release accuracy and implanting stability of the plugging device body are improved, and the plugging device body has selectivity. After release, the stent and the the plugging device body can be recovered to a catheter for relocation or replacement.

A medical device implant for the left atrial appendage of a patient's heart, to prevent strokes. The device includes a cap that overlies the opening of the LAA connected to a bulb in the LAA. Dis-continuous segmented sails attached to the cap promote tissue growth over the device.

The invention discloses a left auricle plugging device locating position automatically in left auricle, solving problems of irrational combination, damaging the left auricle when fixing and residual cavity in left auricle opening place existing in current left auricle plugging device, comprising cradle (1) woven with nickel-tantalum alloy and with net structure in the surface, and insulating membrane (3) installed in cradle (1), the said cradle (1) is formed by connection of hollow plate-like plugging head (6) and hollow cylindrical locating column (5), the outer diameter of the plate-like plugging head (6) is larger than that of cylindrical locating column (5); the center of (5) and (6) are equipped with insulating membrane (3); on the surface which (5)and (6) are not connected is equipped with delivery connector (2). The device is characterized by the rational structure, automatic locating in the left auricle, no occur of applications, and suitable for left auricle of different size.

The present disclosure provides improved medical devices for occluding a left atrial appendage. In one embodiment, the medical device includes a temperature activated memory shape foam that is constructed to transition from a first collapsed conformation to a second expanded conformation upon an increase in temperature such that it can expand to provide an occlusive benefit inside a left atrial appendage. In another embodiment the medical device includes a flowable thermoset that is injected into the left atrial appendage where is it cured so that it may assume the conformation of the left atrial appendage and provide an occlusive benefit.

The invention discloses a left auricle occluding device. The left auricle occluding device comprises a sealing disc and an anchoring device, both of which are connected. The position where the anchoring device is matched with a left auricle is an anchoring net of a boneless structure. The overall anchoring device is of a boneless structure and formed by weaving of hyper-elastic metal wires or memory alloy metal wires. The far end of the anchoring device is in the shape of an opening. The near end of the anchoring device is collected and connected with the sealing disc to form a conical net. The far end of the anchoring device is opened and turned up towards the near end to form the anchoring net surrounding the conical net. The anchoring net is joined with the conical net by means of a circular transition area. The left auricle occluding device has following beneficial effects: force can be uniformly distributed to be anchored in the interior of the left auricle in order to eliminate concentration of local stress and can also be repeatedly released; and an opening part of the left auricle is effectively and reliably blocked.

The invention discloses a plugging system for a left auricle. The plugging system comprises a plugging disc and an anchoring disc; the plugging disc is formed by weaving nickel-titanium alloy wires and conducting heat treatment on the nickel-titanium alloy wires to form the disc-shaped structure; the anchoring disc is also formed by weaving nickel-titanium alloy wires and conducting heat treatment on the nickel-titanium alloy wires to form a column-shaped structure; the anchoring disc at least comprises a thick filament, the thick filament is formed by closely winding the nickel-titanium alloy wires; when the anchoring disc is located in a proper position, at least one nickel-titanium alloy wire stretches outwards towards an inclined direction from the anchoring disc, and faces the plugging disc as an anchoring thorn. The plugging system for the left auricle disclosed by the invention is used for blocking the left auricle, is high in effect of blocking blood clots inside the left auricle from flowing out, can be repeatedly positioned, is fixedly stable, and is resistant to fatigue.

The invention discloses a plugging device for a left auricle. The plugging device comprises a plugging disc, a connecting disc and an anchoring disc, wherein the plugging disc and the connecting disc are respectively formed by weaving nickel-titanium alloy wires and conducting heat treatment on the nickel-titanium alloy wires to form a disc-shaped structure; the diameter of the connecting disc is approximate to that of the anchoring disc; when the connecting disc is unfolded, the connecting disc provides supporting for the anchoring disc to stabilize the fixation of the anchoring disc inside the left auricle; the anchoring disc comprises a central end part connected with the connecting disc and a plurality of support rods connected with the central end part. The plugging device for the left auricle disclosed by the invention is used for blocking the left auricle, is high in effect of blocking blood clots inside the left auricle from flowing out, can be repeatedly positioned, is fixedly stable, and is resistant to fatigue.

Devices, systems, and methods for inverting and closing the left atrial appendage. In at least one embodiment of a method for closing a left atrial appendage of the present disclosure, the method comprises the steps of inverting a distal portion of a left atrial appendage, and constraining the inverted distal portion of the left atrial appendage using a device configured to fit within an interior of the left atrial appendage.

Described here are devices, systems, and methods for closing the left atrial appendage. The methods described here utilize a closure device for closing the left atrial appendage and guides or expandable elements with ablation or abrading elements to ablate or abrade the left atrial appendage. In general, these methods include positioning a balloon at least partially within the atrial appendage, positioning a closure assembly of a closure device around an exterior of the atrial appendage, inflating the balloon, partially closing the closure assembly, ablating the interior tissue of the atrial appendage with the inflated balloon, removing the balloon from the atrial appendage, and closing the atrial appendage with the closure assembly.

Devices, systems, and methods for closing the base of a left atrial appendage or other tissue structure comprise a device applicator having jaws, a shaft, and a handle. First and second triggers on a handle are configured to close the jaws and a closure device in a step-wise manner where tissue penetrating fasteners within the closure device are engaged by studs on the jaws, where the studs must be released prior to the opening of the jaws.

The invention relates to a headset assembly with a recording function for communication, which comprises a left earphone, a right earphone, a conversation module and a recording module, wherein the left earphone and the right earphone are respectively provided with a loudspeaker and a microphone; the conversation module is electrically connected with one of the left earphone and the right earphone; the recording module is electrically connected to the left earphone and the right earphone; under a first operating mode, the conversation module is communicated with an external communication device through the microphone and the loudspeaker of the left earphone or the right earphone; and under a second operating mode, the recording module is used for receiving an environment sound signal simultaneously through the left microphone and the right microphone, and recording and storing the environment sound signal. The microphones can be respectively put in a left auricle and a right auricle, and the recorded sound can contain the effect of an HRTF (Head Related Transfer Function), so that the effect of stereo widening is realized when the recorded sound is replayed.

The invention relates to an occluder for occluding a left aurcle. The novel left aurcle occluder comprises a left aurcle packing column of the occluder, upper barbs of the left aurcle packing column of the occluder, a fixed steering connecting device, a left aurcle cover plate of the occluder, a blood flow barrier membrane, and the like. The novel left aurcle occluder is implanted into the human body by utilizing a minimally invasive therapy method and used for preventing the forming of a thrombus in the left aurcle of a patient with atrial fibrillation by occluding the left aurcle, so that the risk that long-term disability or death due to thromboembolism happens to the patient with atrial fibrillation is lowered. Meanwhile, long-term dependence of the patient with atrial fibrillation on anticoagulant drugs can be eliminated by occluding the left aurcle to provide a new treatment choice for the patient. The occluder is woven by nickel-titanium alloy wires, has a preset extensional appearance, and is used for connecting the left aurcle packing column of the occluder with the left aurcle cover plate of the occluder by virtue of the fixed steering connecting device; the upper barbs of the left aurcle packing column of the occluder are woven on the left aurcle packing column, and the blood flow barrier membrane is sewn in the left aurcle cover plate of the occluder. The novel left aurcle occluder can be used for occluding and blocking the blood flow from entering the left aurcle, the whole left aurcle occluder is smooth and flat in surface and beneficial to epithelization after being implanted.

A system and method for medical image based patient-specific ischemic stroke risk prediction is disclosed. Left atrium (LA) and left atrium appendage (LAA) measurements are extracted from medical image data of a patient. Derived metrics for the LA and LAA of the patient are computed using a patient-specific computational model of cardiac function based on the LA and LAA measurements extracted from the medical image data of the patient. A stroke risk score for the patient is calculated based on the extracted LA and LAA measurements and the computed derived metrics for the LA and LAA of the patient using a trained machine learning based classifier, which inputs the extracted LA and LAA measurements and the computed derived metrics for the LA and LAA as features.

The invention discloses a split left auricle closure device. The split left auricle closure device comprises an anchor device and a seal disc which are arranged in a split mode, one of the anchor device and the seal disc is provided with a cylindrical first connector, and the other one of the anchor device and the seal disc is provided with a second connector matched with the cylindrical wall of the first connector to achieve connection. A limiting hole and hook matching mode can be adopted for the first connector and the second connector, and an interference fit mode can also be adopted at the same time or independently. According to the separable left auricle closure device, the distance between the anchor device and the seal disc can be adjusted according to the form of the left auricle, and thus the seal disc can completely isolate the left atrium from the left auricle.

The invention discloses a device for ligaturing left auricle and the utilization method. the device comprises ligaturing line and conveying system: conveying system comprises internal and external sheath tube, the internal part is hollow; the length of internal sheath tube is little longer than that of external sheath tube, the internal sheath tube can be rested in long sheath tube; godet is set on internal sheath tube, and the front part is equipped with circular ring; hat is connected with front part of internal sheath tube. The utilization method comprises following steps: putting internal sheath tube into external sheath tube, keeping one piercing slot on hat is align to ligaturing line; threading the other end of ligaturing line by using godet through internal sheath tube to form loop; looping left auricle with formed loop, tightening ligaturing line to ligature left auricle. The invention is characterized by small injury area, low risk and prevention of stroke.

The invention provides a left auricle ligation device which comprises an outer sheath tube, an inner sheath tube, a push rod, a lock sleeve and a ligature. The ligature is in the shape of a 'jade pendant', a line knot is tied every section, the ligature penetrates the lock sleeve, and a circular ring is formed at one end of the lock sleeve. The left auricle ligation device is used for firmly and reliably ligating a left auricle without opening a chest, and blood flow is completely blocked.

The invention provides a left auricle occluder and occluding device. The left auricle occluder comprises an occluding structure and a guiding structure; and the guiding structure is used for positioning a pushing structure to the occluding structure, is located in the occluding structure and can be pulled out from the occluding structure, and the near end of the guiding structure is exposed out ofthe near end of the occluding structure. The guiding structure can guide the pushing structure after the pushing structure is separated from the occluding structure and when the pushing structure needs to be connected with the occluding structure, thus the pushing structure can be very easily connected with the occluding structure again, and repositioning is carried out.

An apparatus for performing myocardial revascularization in a beating heart and left ventricular assistance condition comprises an arterial cannula, of a per se known type, arranged in the descending aorta, a novel arterial draining cannula, of a two cannula stage type, so arranged that the draining occurs from the left auricle and left ventricle, and a centrifugal pump allowing blood flow from the left ventricle to the aorta. The apparatus allow the patients to be operated on with the safety of a conventional extra-corporeal circulation and with a risk and cost reduction due to the off-pump technique.

The invention discloses a computer-assisted ultrasonic diagnosis method for a left atrium / left auricle thrombus. The technical scheme includes that data mining technology, a pattern recognition theory and medical clinical information are combined, a gray-scale video and a real-time three-dimensional dynamic video serve as research objects, all-dimensional information in an image is accurately acquired, potential disease association rules in the image information are mined, and multiclass characteristics are comprehensively analyzed to obtain a detection method for automatically detecting and classifying the left atrium / left auricle thrombus. A thrombus recognition method can avoid missed diagnosis and misdiagnosis caused by subjective reasons such as inadequate experience or visual fatigue of doctors, and patients with suspected left atrium / left auricle thrombi clinically detected by transesophageal echocardiography can be confirmed as early as possible, so that the patients without thrombosis can receive cardioversion treatment of atrial fibrillation as early as possible. The method is simple and convenient to operate and high in practicability, and has important guiding significance for diagnosis and treatment of the left atrium / left auricle thrombus and ventricular fibrillation.

An exemplary occlusion device is disclosed. In various embodiments, the exemplary occlusion device includes a cap chamber and a bulb chamber for occluding a left atrial appendage (LAA). In particular embodiments, after delivery to the LAA, the cap chamber and the bulb chamber are each inflated via various amounts of fluid(s) to occlude the LAA.

The invention provides a system and method for medical image based cardio-embolic stroke risk prediction. A system and method for medical image based patient-specific ischemic stroke risk prediction is disclosed. Left atrium (LA) and left atrium appendage (LAA) measurements are extracted from medical image data of a patient. Derived metrics for the LA and LAA of the patient are computed using a patient-specific computational model of cardiac function based on the LA and LAA measurements extracted from the medical image data of the patient. A stroke risk score for the patient is calculated based on the extracted LA and LAA measurements and the computed derived metrics for the LA and LAA of the patient using a trained machine learning based classifier, which inputs the extracted LA and LAA measurements and the computed derived metrics for the LA and LAA as features.

The invention discloses an improved left auricle occluder. The improved left auricle occluder comprises a sealing disc and an anchoring device, wherein the sealing disc is connected with the anchoring device; at least two flow stopping membranes are arranged in the sealing disc; a portion, which is matched with a left auricle, of the anchoring device is an anchoring net; and the anchoring net is a boneless structure. The whole anchoring device is a boneless structure. The anchoring device is knitted by metal wires, a far end of the anchoring device is in the shape of an opening, and a near end of the anchoring device is tucked, is connected with the sealing disc and is in the shape of a conical net; the far end of the anchoring device is opened and turned up towards the near end to form the anchoring net; and the anchoring net surrounds the conical net. By the improved left auricle occluder, a left auricle opening can be occluded in a multi-layered manner, force is uniformly distributed in the left auricle during anchoring, local stress concentration is eliminated, repeated release can be implemented, and the left auricle opening can be occluded effectively and reliably.

The invention discloses a conveyor device. The conveyor device comprises an introducer, and a conveyor and an expanding tube which are in fit with the introducer, wherein the introducer comprises an introduction sheath tube, an introduction sheath tube connecting piece arranged at one end of the introduction sheath tube and a screwing nut arranged at one end of the introduction sheath tube connecting piece; one end of the expanding tube can run through the introduction sheath tube, the introduction sheath tube connecting piece and the screwing nut to be in fit with the introduction sheath tube; the conveyor comprises a conveying sheath tube, a conveying sheath tube connecting piece arranged at one end of the conveying sheath tube, a Y-shaped valve arranged at one end of the conveying sheath tube connecting piece and a push rod of which one end runs through the conveying sheath tube, the conveying sheath tube connecting piece and the Y-shaped valve; one end of the push rod is not protruded out of the conveying sheath tube; and the conveying sheath tube can run through the introduction sheath tube, the introduction sheath tube connecting piece and the screwing nut to be in fit with the introduction sheath tube. The device provided by the invention can rapidly arrange a left auricle sealing device into a left auricle, has a stable structure and high operability, shortens operation time and increases the success rate of operations.