10 results about "Arterial lumen" patented technology

The invention provides an ultrasonic artery segmentation method, system and device based on positioning knowledge driving, and relates to the technical field of medical image processing. The method comprises the following steps: acquiring an original ultrasonic image, wherein the original ultrasonic image is an image containing an arterial lumen; on the basis of a positioning prior learning model, rough region mask mapping of the original ultrasonic image is realized, so that a positioning map containing an artery highlight region is obtained; inputting the original ultrasonic image and the positioning map into a fusion model to obtain a fusion feature map; based on a segmentation network model, segmenting the fusion feature map to obtain a target segmentation image; wherein the fusion model is a model for guiding adaptive fusion. According to the method, the problem of fuzzy positioning of the arterial lumen in the ultrasonic image is effectively solved, and correct positioning of the target is ensured, so that the subsequent segmentation is more stable and accurate, and missed segmentation and wrong segmentation are effectively avoided.

A spiral end head hemodialysis catheter comprises a catheter body, a partition, a venous lumen, an arterial lumen, and side openings at one end of the venous lumen and the arterial lumen, a spiral plate body is arranged at the distal end of the partition, both sides of the spiral plate body are integrally connected with the inner side of the catheter body, and venous spiral cavities and arterial spiral cavities are formed at the end of the catheter body; spiral side holes are arranged on the side walls of the catheter body at the inner ends of the two side cuts, and the two spiral side holes are respectively communicated with the venous lumen and the arterial lumen; the spiral plate body forms a spiral support structure on the inner wall of the catheter, increases the support area of the partition on the inner wall of the catheter, improves the kink resistance and fracture strength of the catheter tip, and makes the catheter have stronger stability in the vein; the spiral side holes arranged at the venous lumen and the arterial lumen form a long opening structure, improve the blood flowability, and the spiral side holes can produce spiral guiding effect, reduce blood accumulation, make blood inflow and outflow more smooth, and effectively reduce thrombus formation.

The utility model discloses a long -term hemodialysis catheter tip structure, including the pipe body, the pipe cavity of pipe body is provided with the baffle along the axial direction extension of pipe body, the baffle will the pipe cavity divide into the artery cavity and the venous cavity of independent each other, the end of pipe body is provided with C / D type tip or S type tip. The present application improves the hemodialysis efficiency from the physical structure, reduces the catheter thrombosis, reduces the infection incidence.

The application provides an ultrasound artery segmentation method, system and device based on positioning knowledge driving, and relates to the technical field of medical image processing. The method comprises the following steps: acquiring an original ultrasound image, wherein the original ultrasound image is an image containing an arterial lumen; based on a positioning prior learning model, rough region mask mapping of the original ultrasound image is realized to obtain a positioning map containing an arterial highlight region; the original ultrasound image and the positioning map are input into a fusion model to obtain a fusion feature map; based on a segmentation network model, the fusion feature map is segmented to obtain a target segmentation image; wherein the fusion model is a model of guided adaptive fusion. The method effectively solves the positioning ambiguity problem of the arterial lumen in the ultrasound image, ensures the correct positioning of the target, thereby making the subsequent segmentation more stable and accurate, and effectively avoiding missed segmentation and erroneous segmentation.

An implantable dialysis port comprises a port body, the port body is internally provided with a vein cavity and an artery cavity which are independent of each other, the artery cavity is provided with a first outlet and a first inlet, the vein cavity is provided with a second inlet and a second outlet, and the first outlet and the second inlet are located in the top of the port body and are sealed by sealing pieces respectively; a first magnet and a second magnet which are arranged in a central symmetry mode are arranged in the harbor body, and the first magnet and the second magnet are opposite in magnetism. The positioning cover can cover the periphery of the port body and is provided with a first puncture hole and a second puncture hole, and when the positioning cover covers the periphery of the port body, the first outlet is located below the first puncture hole, and the second inlet is located below the second puncture hole; a third magnet corresponding to the first magnet and a fourth magnet corresponding to the second magnet are arranged in the positioning cover, the magnetism of the third magnet is opposite to that of the first magnet, and the magnetism of the fourth magnet is opposite to that of the second magnet. A puncture opening can be accurately positioned through the positioning cover, and the puncture success rate is increased.

The invention discloses a flexible bendable rotary grinding drill bit for coronary artery intracavitary plaques and a machining method of the flexible bendable rotary grinding drill bit, and relates to the technical field of medical instruments.The machining method comprises the following steps that a drill bit base body is selected, and a wear-resistant coating material is prepared; the drill bit is designed to be of a multi-section structure formed by connecting a plurality of miniature spherical joints. Cutting the material into multiple sections by using precise laser, and performing electrochemical polishing; smooth spherical joints are machined at the joints of all the sections of the drill bit through the micro-forging technology; firmly covering a superhard wear-resistant coating on the surface of the drill bit; the drill bit is subjected to vacuum heat treatment, and the hyperelastic performance of the material is stabilized; the processed drill bit core is connected with a flexible driving shaft; and a finished product is thoroughly cleaned and sterilized, and packaging is completed in a sterile environment. Through material selection and structural design, the drill bit has flexibility and bendability, and can smoothly pass through tortuous blood vessels to effectively grind calcified plaques.

Endovascular variable aortic control catheters (EVACC) are provided that are adapted to augment upstream blood pressure and regulate downstream blood flow for patients in shock. The EVACC devices provide improved treatment for truncal wounds, which may be used for example on a battlefield, thereby increasing survivability of injured soldiers. The devices are a catheter-based system having a proximal hand piece for controlled deployment of the device through a delivery sheath. A collapsible, wire framework supports an expandable and collapsible occlusion barrier. The wire basket and occlusion barrier expand to fit within the lumen of the aorta. Various movable elements are used to adjust an adjustable passageway to regulate controlled anterograde blood flow.

This invention relates to the field of medical devices and discloses a fiber optic sensing-based early warning device and method for thrombosis in the lumen of a hemodialysis catheter. The fiber optic sensing-based early warning device for thrombosis in the lumen of a hemodialysis catheter includes a catheter body, a fiber optic sensing component, a data transmission module, a signal processing module, and an early warning module. The catheter body has an arterial lumen, a venous lumen, and a central mediastinum located between the arterial and venous lumen. This invention, by at least partially disposing the fiber optic sensing component within the central mediastinum of the hemodialysis catheter, makes the central mediastinum both a separating structure between the arterial and venous lumen and a structural carrier for converting venous pressure changes into fiber optic strain signals. The central mediastinum can generate corresponding micro-strains, which are sensed by the fiber optic sensing component, enabling continuous monitoring of the thrombosis formation trend within the hemodialysis catheter lumen.

The invention discloses an external counterpulsation positive and negative pressure air path system which comprises a bearing body and an air path system, the air path system comprises an air compressor, a positive pressure tank (safety valve), a negative pressure tank (gulp valve), an electromagnetic valve and a connecting pipe fitting, one end of the air compressor is connected with the positive pressure tank through the connecting pipe fitting, and the other end of the air compressor is connected with the negative pressure tank through the connecting pipe fitting; the positive pressure tank and the negative pressure tank are respectively connected with the electromagnetic valve through connecting pipe fittings, the electromagnetic valve is divided into three pipelines, the three pipelines are communicated and connected with an air channel pipeline formed by the bearing body through the connecting pipe fittings, and finally the three pipelines are externally connected with an air bag of a terminal. The external counterpulsation device related to the design is additionally provided with a negative pressure gas path system, positive pressure is used during inflation, negative pressure is used for assisting in pumping and exhausting gas in a gas bag during the end of diastole and exhausting, so that the gas bag is quickly exhausted, and due to the fact that exhausting is more sufficient, elastic potential energy stored in the blood vessel wall is instantly converted into kinetic energy, and the gas path closed loop is formed. And the blood vessel wall is driven to rapidly rebound to try to recover to the original shape and diameter when the blood vessel wall is not pressed, so that the heart ejection accommodating capability of the artery lumen can be further improved, the end diastolic pressure is reduced, the systolic pressure is obviously reduced, the heart post-load is obviously reduced, and the counterpulsation effect is better.

A vascular guide wire device comprising: a guide wire comprising a guide wire head and a laser-acoustic head sensor configured to navigate in a patient's blood vessel, said laser-acoustic head sensor connected via an optic fiber threaded through said guide wire device with a laser-acoustic diode controlled by a laser-acoustic diode controller; a computerized system electronically communicating with said laser-acoustic head sensor, said computerized system comprising a computer, image processing means and display means and configured to provide images and measurements 2-centimeters ahead inside a patient's arteries occlusions therein purposing to move and navigate safely into the right artery lumen; first steering means connected with said guide wire head and configured to navigate said laser-acoustic head sensor according to said image processing results; and opening means connected with said guide wire head for opening total occlusion of said artery.