84 results about "Subsegmental pulmonary artery" patented technology

Endoscopic poses are used to indicate the exact location and direction in which a physician must orient the endoscope to sample a region of interest (ROI) in an airway tree or other luminal structure. Using a patient-specific model of the anatomy derived from a 3D MDCT image, poses are chosen to be realizable given the physical characteristics of the endoscope and the relative geometry of the patient's airways and the ROI. To help ensure the safety of the patient, the calculations also account for obstacles such as the aorta and pulmonary arteries, precluding the puncture of these sensitive blood vessels. A real-time visualization system conveys the calculated pose orientation and the quality of any arbitrary bronchoscopic pose orientation. A suggested pose orientation is represented as an icon within a virtual rendering of the patient's airway tree or other structure. The location and orientation of the icon indicates the suggested pose orientation to which the physician should align during the procedure.

Methods for using blood pumps to treat heart failure are disclosed. The pump is mounted on an interior of a stent, and the stent is releasably mounted on a distal end of a catheter. The distal end of the catheter is inserted into a peripheral artery and advanced to position at a region of interest within the descending aorta, the ascending aorta, or the left ventricle. The stent and the pump are released from the catheter, and the pump is activated to increase blood flow downstream of the pump. The pump can also be positioned in the vena cava or used to treat right-sided heart failure following the insertion of an LVAD, or to improve venous return in patients with varicose veins. Non-stent pumps are described for insertion between the pulmonary vein and aorta, and between the vena cava and pulmonary artery designed for use during cardiac surgery.

As described herein vascular anchoring systems are used to position an implant in a vascular area such as a bifurcated vasculature with relatively high fluid flow, for instance, in an area of a pulmonary artery with associated left and right pulmonary arteries. Implementations include an anchoring trunk member having a first anchoring trunk section and a second anchoring trunk section. Further implementations include a first anchoring branch member extending from the anchoring trunk member. Still further implementations include a second anchoring branch member extending from the anchoring trunk member.

Embodiments of the present invention provide a device and a method for treating at least one of hypertension, pulmonary arteries, diabetes, obesity, heart failure, end-stage renal disease, digestive disease, nonalcoholic fatty liver disease, urological disease, cancers, tumors, pain, asthma or chronic obstructive pulmonary disease by delivering an effective amount of a formulation to a tissue. In embodiments of the present invention, the formulation may include at least one of a gas, a vapor, a liquid, a solution, an emulsion, or a suspensions of one or more ingredients. In embodiments of the present invention, amounts of the formulation and or energy are effective to injure or damage tissue, nerves, and nerve endings in order to relieve disease symptoms.

Minimally invasive systems and methods are described for measuring pulmonary circulation information from the pulmonary arteries. A transbronchial Doppler ultrasound catheter is advanced through the airways and in the vicinity of the pulmonary artery. Doppler ultrasound energy is sent through the airway wall and across the pulmonary artery to obtain velocity information of blood flowing through the artery. The velocity information is used to compute pulmonary circulation information including but not limited to flowrate.

This is directed to methods and devices suited for airway based measurements of pressure in a pulmonary artery. A device is advanced into an airway and in the vicinity of the pulmonary artery. Physical properties of the pulmonary artery are observed through the airway wall using one or more minimally invasive modalities. In a variation, a bronchial balloon catheter measures pressure of the pulmonary artery.

A system and apparatus comprising a multi-sensor catheter for right heart and pulmonary artery catheterization is disclosed. The multi-sensor catheter comprises multi-lumen catheter tubing into which at least three optical pressure sensors, and their respective optical fibers, are inserted. The three optical pressure sensors are arranged within a distal end portion of the catheter, spaced apart lengthwise within the distal end portion for measuring pressure concurrently at each sensor location. The sensor locations are configured for placement of at least one sensor in each of the right atrium, the right ventricle and the pulmonary artery, for concurrent measurement of pressure at each sensor location. The sensor arrangement may further comprise an optical thermo-dilution sensor, and another lumen is provided for fluid injection for thermo-dilution measurements. The catheter may comprise an inflatable balloon tip and a guidewire lumen, and preferably has an outside diameter of 6 French or less.

In a preferred embodiment a radiologist traces the pulmonary artery and pulmonary veins visible in a set of CT images and identifies the arteries and veins. The radiologist's identification of the pulmonary arteries and pulmonary veins is then received by an image analyzer and combined with the analyzer's identification of the pulmonary arteries to form a combined identification; and the analyzer then reviews this combined identification of the pulmonary arteries to detect any pulmonary embolisms. The radiologist's identification of any pulmonary embolisms is compared with the analyzer's identification of any pulmonary embolisms to determine if there are any embolisms identified by the analyzer that were not identified by the radiologist.

As described herein vascular anchoring systems are used to position an implant in a vascular area such as a bifurcated vasculature with relatively high fluid flow, for instance, in an area of a pulmonary artery with associated left and right pulmonary arteries. Implementations include an anchoring trunk member having a first anchoring trunk section and a second anchoring trunk section. Further implementations include a first anchoring branch member extending from the anchoring trunk member. Still further implementations include a second anchoring branch member extending from the anchoring trunk member.

A method and system for segmentation and removal of pulmonary arteries, pulmonary veins, and a left atrial appendage from 3D medical image data, such as 3D computed tomography (CT) volumes, is disclosed. A global shape model is segmented for each of pulmonary arteries, pulmonary veins, and a left atrial appendage in a 3D volume. The segmented global shape model for each of the pulmonary arteries, pulmonary veins, and left atrial appendage is locally refined based in local voxel intensities in the 3D volume, resulting in a respective mask for each structure. The mask is used to remove voxels belonging to the pulmonary arteries, pulmonary veins, and left atrial appendage from the 3D volume in order to better visualize coronary arteries and bypass arteries.

A method of identifying at least part of a pulmonary artery tree (402) comprises receiving (102) a bronchial tree structure (500) and receiving (104) a pulmonary vessel structure (400). A pair of a first bronchial segment (602) and a first vessel segment (604) is identified (106), wherein the first bronchial segment and the first vessel segment are adjacent with respect to position and orientation. The first vessel segment is identified (108) as arterial segment of the pulmonary artery tree. A spatial transformation is applied (110) such that the first bronchial segment and the first vessel segment substantially coincide (602′). Respective further vessel segments (606, 608) are identified (112) adjacent to bronchial segments (610, 612), wherein the bronchial segments are comprised in the bronchial tree.

As described herein vascular anchoring systems are used to position an implant in a vascular area such as a bifurcated vasculature with relatively high fluid flow, for instance, in an area of a pulmonary artery with associated left and right pulmonary arteries. Implementations include an anchoring trunk member having a first anchoring trunk section and a second anchoring trunk section. Further implementations include a first anchoring branch member extending from the anchoring trunk member. Still further implementations include a second anchoring branch member extending from the anchoring trunk member.

The invention provides a self-adaptive plugging device. The self-adaptive plugging device is characterized by comprising a first plugging disc and a second plugging disc which are used for plugging blood flows of coloboma positions, the first plugging disc is connected with one end of a connecting waist portion which can be stretched and deflected, and the other end of the connecting waist portion which can be stretched and deflected is connected with the second plugging disc. According to the self-adaptive plugging device, the connecting waist portion can be stretched and deflected; by means of stretching and deflection of the connecting waist portion, the functions of adjusting the length and the angle of deflection of the plugging device can be achieved; generally, certain included angles exist between aortas and pulmonary arteries, and under the action of the adjustable waist portion, the plugging discs on the two sides can be well attached to the wall faces of catheters of the aortas and the pulmonary arteries respectively, and the main performances such as the rebound resilience, the fixity and the plugging effect of the plugging device are significantly improved.

Compounds, compositions, and methods for inhibiting pulmonary hypertension are disclosed. The invention is particularly directed to the use of agents that specifically inhibit the activity of certain endogenously produced epoxyeicosatrienoic acids that promote vasoconstriction of pulmonary arteries. These agents are particularly useful for inhibiting hypoxia-induced pulmonary hypertension. The invention further discloses additional compounds, compositions and methods for increasing pulmonary hypertension.

The present invention belongs to the medical technology field and relates in particular to a blood vessel support for a tectorial membrane implanted in a pulmonary artery for a patient with congenital heart disease pulmonary hypertension, which is a constrictive support used for a surgical treatment of a pulmonary artery hypertension; the invention is characterized in that a pulmonary artery constrictive support body (9) is a hollow body of which the diameter of two ends are large, and the center diameter of the hollow body is small; both ends of the hollow body are provided with a releasable wave-shaped entry (1) and a wave-shaped exit (4); the surface of the pulmonary artery constrictive support body (9) has a polytetrafluoroethylene membrane (3), which adheres in a pulmonary artery and can be accurately positioned; the invention is capable of lowering arising possibility of a thrombus, and is suitable for people of different ages and makes a doctor operation simple and reliable.

The invention discloses a safety improved pulmonary artery stent and a pulmonary artery valve replacement device. The safety improved pulmonary artery stent comprises a pipe-shaped supporting net stent and two flaring sections which are connected with two axial ends of the supporting net stent; every flaring section is connected with an end portion of the supporting net stent through a fixing part; one ends of the flaring sections, which are back to the supporting net stent, is provided with a plurality of wave crests which are provided with smooth edges. The pulmonary artery valve replacement device comprises the safety improved pulmonary artery stent and a prosthesis valve which is arranged inside the pulmonary artery stent. According to the safety improved pulmonary artery stent, the flaring sections are connected with the supporting net stent through the fixing parts, namely, the flaring sections and the supporting net stent are connected in a detachable mode, the safety is improved, the utilization is flexible, and meanwhile machining difficulty is reduced.

As described herein, vascular anchoring systems are used to position an implant in a vascular area such as a bifurcated vasculature with relatively high fluid flow, for instance, in an area of a pulmonary artery with associated left and right pulmonary arteries. Implementations include an anchoring trunk member having a first anchoring trunk section and a second anchoring trunk section. Further implementations include a first anchoring branch member extending from the anchoring trunk member. Still further implementations include a second anchoring branch member extending from the anchoring trunk member.

A steerable multi-lumen catheter is provided which can be used in cardiology procedures where the catheter allows clinicians to access the small pulmonary arteries for monitoring and performing interventional procedures. The catheter allows precise changes in direction and simplifies challenging navigation procedures such as crossing a thick and calcified aortic valve with a wire. A bendable tip aids navigation during interventional radiology and neurology procedures to enter tortuous vessels or aneurysms.

The invention discloses a pulmonary artery stent capable of subsequent dilation and a conveyor thereof. Dilation of the pulmonary artery stent is realized through cylindrical dilation of each element node and cylindrical dilation of each element node is realized through deformation in wavy expansion form, and as deformation in wavy expansion form is free from structure constraint, the pulmonary artery stent can continue dilating after cylindrical dilation of each element node, thus ensuring the pulmonary artery stent to realize subsequent dilation along with pulmonary artery diameter to ensure the stenosed pulmonary artery to retain sufficient support force. The pulmonary artery stent of above structure has slight radial retraction and axial retraction. Besides, partial troughs of each element node have larger amplitude and the peaks of the adjacent element nodes at one side of the troughs of the element nodes have large amplitude, thus being capable of shortening the gaps between two adjacent element nodes. Node rods with larger length can be arranged and have larger width to ensure flexible uniform distribution of the pulmonary artery stent.

As described herein vascular anchoring systems are used to position an implant in a vascular area such as a bifurcated vasculature with relatively high fluid flow, for instance, in an area of a pulmonary artery with associated left and right pulmonary arteries. Implementations include an anchoring trunk member having a first anchoring trunk section and a second anchoring trunk section. Further implementations include a first anchoring branch member extending from the anchoring trunk member. Still further implementations include a second anchoring branch member extending from the anchoring trunk member.

A method for distinguishing between pulmonary arteries and pulmonary veins and a method for quantifying blood vessels are disclosed. The method for distinguishing between pulmonary arteries and pulmonary veins includes: forming a set of pulmonary vessels for points corresponding to pulmonary vessels, wherein each of the points of the set of pulmonary vessels has weight information; forming a tree from the points of the set of pulmonary vessels by using the weight information; and distinguishing between the pulmonary arteries and the pulmonary veins by separating the tree into a plurality of regions. The method for quantifying blood vessels includes: extracting blood vessels as a three-dimensional set of voxels based on medical images of an organ; finding the voxels of blood vessels included in a region of interest of the organ; and quantifying length information of the blood vessels by using the found voxels.

As described herein vascular anchoring systems are used to position an implant in a vascular area such as a bifurcated vasculature with relatively high fluid flow, for instance, in an area of a pulmonary artery with associated left and right pulmonary arteries. Implementations include an anchoring trunk member having a first anchoring trunk section and a second anchoring trunk section. Further implementations include a first anchoring branch member extending from the anchoring trunk member. Still further implementations include a second anchoring branch member extending from the anchoring trunk member.

The invention discloses an ASD (atrial septal defect) reserved-hole occluder comprising a left disc, a right disc, a cylindrical barrier portion and through hole penetrating the left disc, the right disc and a cylindrical. The left disc and the right disc are used for occluding an opening. The cylindrical barrier portion between the left disc and the right disc occludes the ASD. The diameter of the left disc is greater than that of the right disc. The diameter of the right disc is greater than that of the cylindrical barrier portion. The left disc, the right disc, the cylindrical barrier portion and the through hole are all made by braiding a plurality of memory alloy wires; the memory alloy wires penetrate the through hole to form a wall of the through hole and are wound into the left disc, the right disc and the cylindrical barrier portion; two ends of every memory alloy wire are both fixed to a same fixture used for restraining the memory alloy wires; the memory alloy wires are mutually staggered into an elastic mesh; a seal film is arranged in the elastic mesh. Branch flows of the aorta and pulmonary arteries are limited, volume overload and pressure conduction of pulmonary vessels are relieved, a release space is provided for high pressure of the right heart system, and patients with advanced pulmonary arterial hypertension are saved.