95 results about "Aorta aortic" patented technology

The present invention relates to providing counter-pulsation heart assist by deforming the aorta. In a preferred embodiment, the deformation pressure is applied by cyclically, preferably in synchrony with the diastolic period of the heart. The deformation pressure may be applied to the outer wall of the aorta or to a patch covering a resected opening in the wall of the aorta.

The subject invention concerns vascular prosthetic devices and methods for ascending aorta and / or valve replacement in humans and animals. In one embodiment, a device of the invention includes a vessel-like structure having a first end adapted for surgical attachment to a left ventricle, a second end adapted for surgical attachment to an aorta, and, interposed between the first and second ends, a sinus portion configured in the shape of the sinuses of Valsalva in a human aortic valve.

The present invention relates to providing counter-pulsation heart assist by deforming the aorta. In a preferred embodiment, the deformation pressure is applied by cyclically, preferably in synchrony with the diastolic period of the heart. The deformation pressure may be applied to the outer wall of the aorta or to a patch covering a resected opening in the wall of the aorta.

Described herein is a guide wire that includes one, two or multiple pressure transducers for use in TAVI. The guide wire may include an aortic pressure sensor spaced from a left ventricular pressure sensor with sufficient length to allow the aortic pressure sensor to be located in the aorta while the ventricular pressure sensor is simultaneously located in the left ventricle. The pressure readings between the left ventricle and aorta may be subtracted to determine an improved indication of the prognosis of a patient with intermediate post-TAVR aortic regurgitation after assessment with transesophageal echocardiography.

The invention provides a dissection artery segmentation method and device. The dissection artery segmentation method comprises the steps of obtaining an original CTA image of a to-be-segmented aorta;preprocessing the original CTA image to obtain a second target CTA image; segmenting the second target CTA image by using an artery segmentation model and a cavity segmentation model in the trained segmentation model to obtain a first structure model marked with an interlayer aorta and a branch artery and a second structure model marked with a true cavity and a false cavity on the interlayer aorta; and based on the first structure model and the second structure model, carrying out true cavity and false cavity misclassification correction on the second structure model. According to the dissection artery segmentation method, the original CTA image is subjected to standardization processing, and the standardized CTA image is segmented by using the artery segmentation model and the cavity segmentation model, so that the image data needing to be processed is greatly reduced, and the interlayer artery segmentation efficiency is effectively improved, and the segmentation precision is improved.

Embodiments of the present invention are directed to implantable systems, and methods for use therewith, that monitor and modify a patient's arterial blood pressure without requiring an intravascular pressure transducer. In accordance with an embodiment, for each of a plurality of periods of time, there is a determination one or more metrics indicative of pulse arrival time (PAT), each of which are indicative of how long it takes for the left ventricle to generate a pressure pulsation that travels from the patient's aorta to a location remote from the patient's aorta. Based on the one or more metrics indicative of PAT, the patient's arterial blood pressure is estimated. Changes in the arterial blood pressure are monitored over time. Additionally, the patient's arterial blood pressure can be modified by initiating and / or adjusting pacing and / or other therapy based on the estimates of the patient's arterial blood pressure and / or monitored changes therein.

An aortic artery measuring probe, device and a method of measuring the diameter of the aortic artery are provided. The aortic artery measuring device includes the aortic artery measuring probe and a signal processing module electrically connected to the aortic artery measuring probe. The aortic artery measuring probe includes a flexible substrate and a sensor array disposed thereon, wherein the sensor array includes M×N ultra-wideband sensors. The ultra-wideband sensors is positioned on a subject and the flexible substrate is deformed to a profile conforming to the profile of the subject. The ultra-wideband sensors transmit a radio wave into the subject and then the radio wave is reflected by a tissue interface of the artery wall of the aortic artery to form a reflected signal. The ultra-wideband sensors receive the reflected signal and the signal processing module analyzes the reflected signal to define the diameter of the aortic artery.

A method of deriving a quantitative measure of a degree of calcification of a blood vessel such as an aorta by processing an image such as an X-ray image of at least a part of the blood vessel containing said calcification comprises:taking a starting set of digital data representative of an image of at least part of a blood vessel containing a calcification set against a background;estimating the boundary of the calcification;using inpainting to replace digital data in said starting set representing the calcification with data extrapolating the boundary of the background to extend over the area of calcification, and so generating an inpainted set of digital data; andcomputing the difference between the starting set of digital data and the inpainted set of digital data to obtain a quantitative measure of the degree of calcification of the blood vessel.

An examination device for a heart. An afterload device connected to the aorta provides a counter-pressure by an annular space delimited between a rigid cylinder and an elastic tube inserted in the rigid cylinder. The annular space comprises a compressible medium, such as air, nitrogen gas or carbon dioxide and is connected to a reservoir providing a predetermined pressure corresponding to a diastolic pressure. The reservoir is connected to the annular space via a restriction and a back-flow valve. During diastole, the annular space is inflated by the reservoir and provides a diastolic counter pressure for providing coronary flow. During systole, the ejected fluid from the heart ventricle displaces the medium inside the annular space through the restriction to the reservoir, thereby removing energy from the fluid. The compressible medium forms a compliance. Also, there is a preload device comprising a vertical collapsible tube for preload of the atrium.

Methods and devices are disclosed for the formation of a communication between the aorta and left atrium. The method includes introducing a puncturing device, positioning the device at a location along the aorta, and advancing the puncturing device to create a pathway. The method may include: a. via an inferior artery, advancing a perforating tip of the puncturing device towards the aorta; b. positioning the perforating tip adjacent a wall of the aorta, proximate the left atrium; and c. advancing the perforating tip to perforate through the wall of the aorta and then through a wall of the left atrium, to create a pathway between the aorta and the left atrium, wherein the creation of the pathway can be confirmed with at least one of fluoroscopy, electro-anatomical mapping, pressure measurement, contrast injection, and echocardiograph.

Catheters for infusion of cardiovascular fluids into blood are disclosed. The cardiovascular fluid may, for example, comprise water highly supersaturated with a gas such as oxygen. Each catheter comprises one or more capillary tubings (or capillaries) through which a cardiovascular fluid flows. The distal end of each capillary is mounted (e.g., potted) preferably flush with an external surface of a catheter sidewall, while the proximal end of each capillary is in fluid communication with a cardiovascular fluid flowing through the lumen of the catheter. The combination of the catheter shape and the orientation of the distal end of each capillary relative to the longitudinal axis of the catheter provides control over the mixing pattern of the cardiovascular fluid with blood flowing within a vascular space such as an aorta.

The invention provides an aortic dissection stent graft which comprises a metal stent, wherein a tectorial membrane is attached on the external part of the stent, the aortic dissection stent graft further comprises an artificial blood vessel, a branching vessel is arranged on the wall of the artificial blood vessel, one end of the artificial blood vessel is connected with the tectorial membrane attached on the surface of one end of the stent, and is used for perfusing blood during surgery. The tectorial membrane is attached on the external part of the stent to form a tubular shape. One end of the tubular tectorial membrane is connected with the artificial blood vessel which is further connected with the branching vessel. During surgery, the roots of aortic are cut off, and the stent is implanted at cleavage of an endarterium through a catheter. In addition, blood is perfused into the branching vessel, so that the perfused blood is used for being supplied to tissues of a lower body. By adopting the aortic dissection stent graft, the circulatory arrest time is shortened, the incision of femoral artery is not needed, and the surgery wound can be reduced, the surgery time can be shortened, and the complications caused by the blood retrograde perfusion of the femoral artery can also be avoided.

The present invention relates to a method for determining patient-specific blood vessel information. More specifically, the present invention relates to a method for determining patient-specific cardiovascular information by applying a simplified coronary circulation model thereto. Furthermore, the present invention relates to a method for determining a blood flow rate for branches of a blood vessel having originated from an artery of each patient. According to the present invention, the method for determining cardiovascular information by using a computer system comprises the steps of: receiving image data including a plurality of coronary arteries having originated from the aorta; processing the image data so as to generate a three-dimensional shape model of the plurality of coronary arteries; simulating a blood flow for the generated three-dimensional shape model of the plurality of coronary arteries; and determining a fractional flow reserve (FFR) of the respective coronary arteries with the blood flow simulation result. In the blood flow simulation step for the three-dimensional shape model of the plurality of coronary arteries, a computational fluid dynamics model is applied to the three-dimensional shape model of the coronary arteries, and a centralized parameter model to be combined with the computational fluid dynamics model uses a simplified coronary circulation model including coronary arteries, capillaries of the coronary arteries, and coronary veins.

The invention provides a method and a device for dividing a coronary artery. The method comprises the following steps: (1) determining the position of an aorta in an original image, and performing reinforced filtering on the original image, thereby obtaining a reinforced filtered image; (2) obtaining the starting areas of a left coronary artery and a right coronary artery according to the position of the aorta, the original image and the gray scale of the reinforced filtered image; (3) dividing the reinforced filtered image based on at least one preset dividing threshold, obtaining a candidate area which corresponds with the preset threshold, and determining the candidate areas of the left coronary artery and the right coronary artery according to the candidate area and the starting areas of the left coronary artery and the right coronary artery; and (4) according to the position relationship between the aorta and the candidate areas of the left coronary artery and the right coronary artery, respectively screening the candidate areas of the left coronary artery and the right coronary artery, connecting the screened candidate areas with the starting areas, and obtaining the left coronary artery and the right coronary artery. The method and the device provided by the technical solution of the invention can wholly, accurately and automatically extract the left coronary artery and the right coronary artery, thereby facilitating qualitative and quantitative analysis and treatment for diseases of angiocardiopathy by a doctor.

Connectors interfacing a mechanical circulatory system with a patient's natural vasculature are provided herein. Such connectors include aortic connectors that facilitate fluid coupling of an outflow graft tube from an implanted blood pump with a patient's aorta. Aortic connectors can include a substantially planar portion configured for sealed attachment with a wall of the aorta and a tubular connector portion extending from an inlet opening to an outlet opening. The substantially planar portion can include a flexible membrane for attachment to an outer surface of the aorta and / or a flange for engagement with an inner surface of the aorta. The tubular connector can extend from the substantially planar portion at a pre-determined angle and include one or more attachment features to facilitate rapid fluidly sealed attachment to the outflow graft tube.

The invention relates to a branch type aorta artificial stent conveying device. The branch type aorta artificial stent conveying device comprises a conveyor, an artificial stent arranged in the conveyor and a catcher used for cooperating with the conveyor. The catcher is guided into branch arterial blood vessel, the conveyor is guided into the focus position of the aorta, then a soft sheath is fixed, an outer tube is gradually withdrawn to expose branch guide wires, then the catcher is used for catching the branch guide wires, and therefore, branch arterial stents are guided into the branch arterial blood vessel through the branch guide wires. In the surgical operation process, due to the fact that the branch guide wires are not reserved on the aorta in advance, the phenomena of crossing and winding of the guide wires cannot occur, the surgical operation difficulty is reduced, the surgical operation is simpler, the surgical time is shortened, and the surgical risk is reduced.