51 results about "Three vessels" patented technology

The invention relates to the technical field of image analysis, in particular to a three-dimensional hepatic duct, hepatic artery, portal vein and hepatic vein image segmentation method and system. The method comprises the following steps: acquiring multi-phase medical image data of a liver region; performing region identification on the image data, and extracting hepatic duct, hepatic artery, portal vein and hepatic vein regions; executing structure tracking on the hepatic duct area to obtain a hepatic duct positioning result; carrying out improved contrast extraction on the hepatic artery region to obtain hepatic artery positioning data; performing directional segmentation analysis on the portal vein region to obtain a portal vein positioning result; performing branch angle extraction on the hepatic vein region in combination with the portal vein direction to obtain hepatic vein positioning data; taking the hepatic artery as a reference structure, performing elastic registration on each blood vessel structure, and generating registration data under a unified coordinate; and completing three-dimensional visualization based on a registration result. According to the method, multi-stage image joint segmentation and registration are realized, and the method has the technical advantage of high structural recognition integrity.

The invention provides a fracture repair and topology analysis method for a blood vessel segmentation mask in a liver CT image, and the method specifically comprises the steps: 1) carrying out the skeletonization of the liver blood vessel segmentation mask, and extracting a blood vessel skeleton, a skeleton end point, and a blood vessel radius rough value at a skeleton point; 2) solving a connected blood vessel center line (1) for the purpose of fracture repair without considering removal of wrong adhesion of hepatic veins and portal veins; 3) considering possible wrong adhesion for removing the hepatic vein and the portal vein, setting a stricter connection condition to obtain a broken blood vessel center line, and solving a broken blood vessel center line (2) in which the hepatic vein and the portal vein are obviously distinguished by taking classification as a purpose; and 4) combining the center lines (1) and (2), reconstructing missing blood vessel segments in the original blood vessel segmentation mask, and combining the reconstructed blood vessel segments into the original segmentation mask to obtain a final blood vessel mask and center line topological structure after fracture repair.

According to the endoscope imaging fusion enhanced imaging method and device, imaging characteristics of white light (an overall structure background), red light (a deep blood vessel), green light (a high-contrast capillary vessel) and blue light (an enhanced surface microstructure) are comprehensively utilized, digestive tract mucosa can be analyzed in a layered mode, and comprehensive diagnosis and early focus recognition from the surface layer to the deep layer are achieved; during image fusion, adaptive weight configuration based on focus types is supported by adopting a weight dynamic adjustment mechanism, so that the quality of the finally fused image is influenced, and therefore, a neural network architecture is adopted to train each channel weight, and a more reasonable weight value can be obtained.

The invention provides a method for measuring the geometric morphology of a carotid artery. The method is used for carrying out quantitative analysis on a three-dimensional structure of the carotid artery. According to the method, an improved Fast Marching algorithm is utilized to automatically generate parameterized center lines of all blood vessel branches of the carotid artery bifurcation, a maximum inscribed sphere is defined on the center lines, the radius of the inscribed sphere is determined by calculating the minimum distance from each point on the center lines to the blood vessel wall, and the local blood vessel diameter is calculated based on the radius. A Gaussian weighted average method is adopted to obtain the blood vessel feature diameter; based on the parameterized center line and the weighted average diameter, a series of carotid artery geometric morphology parameters are calculated, and the carotid artery geometric morphology parameters comprise a weighted blood vessel diameter ratio, a bifurcation angle tensor and a normalized curvature index; the method is high in automation degree and high in reliability, manual measurement errors are reduced, and objective and accurate quantitative indexes are provided for early diagnosis and risk assessment of carotid artery diseases.

According to the arteriosclerosis detection method and device, the upper arm blood pressure is obtained based on the heart and ankle vascular index CAVI; systolic pressure Ps and diastolic pressure Pd are obtained; calculating to obtain a pulse pressure difference delta P, wherein the pulse pressure difference delta P = systolic pressure Ps-diastolic pressure Pd; measuring to obtain the distance Lca from the heart aortic valve to the ankle; measuring to obtain the time difference Tca of the pulse wave propagating from the heart to the ankle; a heart and ankle vascular index CAVI is obtained through calculation according to the following formula; # imgabs0 # is used for measuring and obtaining a pulse wave starting point time point TA1 of the ankle; measuring a pulse starting point TA2 of brachial artery pulse waves, and calculating TA1 to TA2 to obtain a time difference Tba; measuring to obtain a heart sound signal of cardiac pulsation, and obtaining a time difference T2 between a second heart sound and a first incision of the brachial artery; the time difference Tca is equal to the sum of the time difference Tba and the time difference T2. At least three blood pressure measuring devices and at least three electrocardio detection electrodes are arranged; the heart sound detection module is in electric signal connection with the heart sound detection sensor through a signal line; the heart sound detection sensor is used for being placed at the heart position of a detected person to obtain heart sound signals.

The invention discloses an arm model for simulating internal arteriovenous fistula puncture, and the model comprises an arm model which comprises an inner base model and an epidermis model sleeving the outer side of the inner base model; the blood vessel model comprises an artery section, a vein section and an internal fistula body section; the circulating pump body is respectively connected with the end parts of the artery section and the vein section and is used for circularly conveying the blood model along the artery section and the vein section; the inner base model comprises an inner base and a plurality of thickening layers arranged outside the inner base in a sleeving mode, the artery section and the vein section are arranged corresponding to the inner sides and the outer sides / the same sides of the thickening layers respectively, and holes allowing the internal fistula body section to penetrate through are formed in the thickening layers. Through the arrangement of the thickening layers, a proper number of thickening layers can be adjusted according to simulation requirements to sleeve the inner base, so that the size of the inner base model is adjusted, and the specific positions of the artery section, the vein section and the internal fistula body section are autonomously set through the holes in the thickening layers to meet different simulation requirements.

The invention discloses a method for measuring the pressure in the heart cavity of a mouse, and relates to the technical field of experimental animal medical detection, and the method comprises the following steps: cutting an incision of about 1cm in the neck of the mouse; placing two sutures below the common carotid artery, and ligating the common carotid artery by using the suture at the distal end; the other section of suture line is placed in the middle of the right common carotid artery, the carotid artery is lifted up, the blood filling condition is observed, an opening is formed in the blood vessel, a pressure volume catheter is inserted, and meanwhile the suture line at the telecentric end is slightly pulled backwards to prevent bleeding; the pressure volume catheter is inserted into the left ventricle through the right common carotid artery, and the left ventricle pressure maximum rising rate and the left ventricle pressure maximum falling rate are collected. By means of the carotid artery approach, serious trauma caused by thoracotomy can be prevented, and the cardiac physiology can be possibly affected by the operation. Therefore, the carotid artery approach is more suitable for a long-time pressure collection experiment.

The erection assisting device comprises a C-shaped base body used for being arranged on the lower side of a penis body during use, the length direction of the C-shaped base body is reversely consistent with the length direction of the penis body, and a left side pressing set, a middle pressing set and a right side pressing set which are sequentially arranged in the circumferential direction of the C-shaped base body are arranged on the inner side of the C-shaped base body; the left pressing set is used for pressing the left penis cavernosum, the middle pressing set is used for pressing the urethra cavernosum, and the right pressing set is used for pressing the right penis cavernosum. Each pressing group comprises a first cavernous body pressing head, a second cavernous body pressing head and a third cavernous body pressing head which are sequentially arranged along the blood flow direction of an artery blood vessel in the corresponding cavernous body and can independently act, and each cavernous body pressing head is expanded by filling a medium into the cavernous body pressing head so as to press a target blood vessel; or the cavernous body pressing head presses the target blood vessel through up-down translation. The erection assisting device provided by the invention can be used for carrying out erection pressure distinguishing on the urethral cavernous body and the penis cavernous body.

The invention discloses a preoperative auxiliary quantitative analysis method for main pulmonary artery septal defect, which comprises the following steps: S1, acquiring CT image data of aorta, pulmonary artery and surrounding tissues of a patient, and constructing three-dimensional models of the aorta and the pulmonary artery; s2, performing preoperative artery three-dimensional reconstruction and parameter quantization based on the three-dimensional model obtained in the S1; and S3, on the basis of the parameters obtained in the S2, performing three-dimensional reconstruction and parameter quantification of arteries after four different operations including main suture lung sutures, main suture lung tonification, main tonification lung sutures or main tonification lung tonification. Based on medical image data of a patient, before operative treatment of aortic pulmonary artery septal defects, a virtual simulation method is used for conducting three-dimensional reconstruction on blood vessels of the patient before and after the operation, and then postoperative main pulmonary artery parameters are quantified under the condition that four operation schemes are simulated for the patient; and a doctor is helped to more accurately evaluate the postoperative condition of a patient before an operation so as to select an optimal operation scheme.

This disclosure provides a measurement system and method for the pathological features of hypertensive retinopathy. The measurement system includes: an acquisition module that acquires fundus images; a partitioning module that receives the fundus images and identifies and partitions the optic disc region; a segmentation module that uses an arteriovenous segmentation model to segment the fundus images into arteries and veins to obtain a three-valued image of the segmentation results. The arteriovenous vessel marking results include arterial and venous marking results formed by marking the boundaries of vessels with diameters larger than a preset vessel diameter in the training fundus images, and small vessel marking results formed by marking the course of vessels with diameters not larger than the preset vessel diameter. The measurement module measures the pathological features of hypertensive retinopathy in the fundus images based on the vessels larger than the preset vessel diameter in the partitioning and segmentation results. This disclosure enables efficient and objective measurement of the characteristics of hypertensive retinopathy.

The tourniquet comprises a chest adjusting band, an armpit adjusting band and a pressurizing air bag, fixing pads are symmetrically connected between the chest adjusting band and the armpit adjusting band, shoulder adjusting bands are arranged on the upper portions of the fixing pads, and the fixing pads and the adjusting bands can be matched for tightness adjustment; a bottom plate is fixedly arranged on the bottom face of the pressurizing air bag and attached to the inner side of the fixing pad, and at least two pressurizing heads are fixedly arranged on a protruding top circular truncated cone of the pressurizing air bag. The pressurizing heads are semicircular cylinders, the cylindrical circumferential surfaces of the pressurizing heads face outwards, and the pressurizing heads are close to each other, so that the pressurizing heads form a double-contact design. According to the tourniquet, the tightness of the multiple adjusting bands is adjusted, so that the tourniquet is more fit with the shape of the human body, precise compression hemostasis can be conducted on important blood vessels such as subclavian arteries and axillary arteries of the upper limbs of the human body, and compared with existing tourniquets which are mostly subjected to planar range compression hemostasis, the tourniquet has the advantage that the hemostasis pain of the wounded can be reduced.

In a method of non-invasively obtaining information on intracranial pressure of a patient, during a first time period, a plurality of facial veins of the patient are occluded by applying external pressure to each of the plurality of facial veins, which emanate from the periorbital region. During the first time period, external pressure is applied to a designated vein (17) connected to an intracranial vessel at a location within the region, upstream of the occlusion of the plurality of facial veins. Changes in the geometry of the designated vein (17) caused by the external pressure are observed to obtain at least one first value related to venous pressure in the designated vein (17). The at least one first value is processed to obtain information on intracranial pressure. The method enables measuring pressure values that are closely related to intracranial pressure without the need for measurements within the intracranial space. Instead, an occlusion establishes a direct pressure communication between the intracranial vessel and the designated vein, which can be easily examined outside the head.

An outflow conduit for a heart pump, the outflow conduit including an inlet configured to be attached to a pump outlet of the heart pump to receive blood therefrom, an outlet configured to be connected to an arterial vessel, wherein the outlet includes a flared portion to minimise flow restrictions and a sidewall defining an internal cavity extending from the inlet to the outlet, the cavity being configured to transport blood from the heart pump to the arterial vessel.

The invention relates to the technical field of medical supplies, in particular to an ECMO arterial duct capable of changing the perfusion blood flow direction, which comprises a duct body with openings at two ends, the right end of the duct body is a pre-flushing section, the middle end of the duct body is a buffer section, and the left end of the duct body is a perfusion section; the perfusion section comprises a central tube cavity and three side tube cavities, the central tube cavity is formed in the middle end of the interior of the tube body, three equally-divided partition plates are arranged on the peripheral side of the central tube cavity, and the three partition plates divide the tube body into the three side tube cavities; and the inner wall of the left end of the side tube cavity is a blood flow redirection diversion curved surface. According to the invention, the arterial duct cavity is designed into the central lumen for forward blood flow and the three lateral lumens for variable-direction blood flow, so that the blood flow direction of the ECMO arterial duct is consistent with the physiological direction to the greatest extent, the adverse effect of ECMO on left heart output and the damage to vascular endothelium are weakened, and the treatment effect of the ECMO is improved. And the hemodynamic stability and safety in the VA-ECMO implementation process are improved.

The present disclosure is directed a method of facilitating treatment via a vascular wall defining a vascular lumen containing an occlusion therein. The method may include providing a first intravascular device having a distal portion and at least one aperture and positioning the distal portion of the first intravascular device in the vascular wall. The method may further include providing a reentry device having a body and a distal tip, the distal tip having a natural state and a compressed state and inserting the distal tip, in the compressed state, in the distal portion of the first intravascular device. The method may further include advancing the distal tip, in the natural state, through the at least one aperture of the first intravascular device.

The invention relates to the technical field of medical equipment, in particular to a cardiac intervention postoperative hemostasis device. Comprising a base plate, a binding belt arranged on the base plate and used for binding the base plate to a limb of a patient at a puncture position, a first compression mechanism arranged on the base plate and used for compressing tissue at the puncture position, an artery compression mechanism used for compressing an artery puncture point and an epidermis compression mechanism used for compressing an epidermis puncture point. According to the scheme, the artery puncture point and the epidermis puncture point are independently pressed through the artery pressing mechanism and the epidermis pressing mechanism respectively, so that the pressure borne by the artery at the artery puncture point and the epidermis puncture point is larger than the pressure of other parts, and the contraction degree of the artery blood vessel at the artery puncture point is increased; the closing speed of the artery blood vessel at the artery puncture point is accelerated, and the hemostasis effect is effectively improved.

A capillary blood collection device includes a body with an internal chamber. The body generally includes a first end, a second end, and a port between the first end and the second end and providing access to the internal chamber between the first end and the second end. The first end defines an opening into the internal chamber, and the second end of the body opposite from the first end is compressible and configured to generate a vacuum when compressed. The port may receive at least one of a lancet device or a collection tube.

The invention provides a cun-guan-chi pulse condition and extended pulse condition qi and blood circulation regulating system which comprises a cun-guan-chi pulse condition sensing module, an extended pulse condition recognition module, a qi and blood circulation regulating execution module and a pulse condition feedback module. Through cooperative work of the cun-guan-chi pulse condition sensing module and the extension pulse condition recognition module, overall recognition and communication from local pulse conditions to whole-body pulse conditions are achieved, local limitation of traditional pulse diagnosis is broken through, multiple physiological structures such as internal organs, blood vessels, muscles and bones, fascia, meridians, nerves, muscles, skin and acupuncture points can be fully covered, and the pulse diagnosis effect is improved. And various pathological changes such as thrombus, cyst, nodule, calculus, myoma, tumor, vessel blockage or calcification and the like can be effectively treated. A debonding unit, a pulse pushing unit and a pulse digging unit in the qi and blood circulation regulating execution module can perform accurate operation in a specific area according to pulse condition information, for example, the problems of qi and blood blockage, sclerosis or hydrops and the like can be regulated in a targeted mode at the roots of palmaris, the middle lung lobe, the lower lung lobe and the like.

To provide methods and systems for providing or maintaining fluid flow through body passages such as heart cavities and blood vessels.SOLUTION: Devices and methods divert blood flow from a first vessel to a second vessel and maintain blood flow in the first vessel. The device includes a first segment and a second segment. The first segment is configured to anchor in the first vessel. The first segment includes a window to allow blood to flow into the first segment, through the window, and distal in the first vessel. The second segment is configured to anchor in the second vessel. The second segment is configured to allow blood to flow into the first segment, through the second segment, and into the second vessel.SELECTED DRAWING: Figure 1

Systems and procedures for the intermittent occlusion of a patient's venous vascular system are provided to relieve the heart while simultaneously increasing cardiac output and improving cardiac perfusion. The system may include a first and a second balloon catheter that can be selectively activated to intermittently occlude a first and a second vein, thereby increasing venous resistance in the patient's lower and upper extremities, respectively. This selectively reduces arterial blood flow to these extremities while maintaining arterial resistance to the heart and central organs and increasing cardiac and central organ perfusion.

The present invention provides a 3D imaging method and system for surface vein blood vessels based on three-dimensional mapping, belonging to the technical field of 3D imaging of surface vein blood vessels. The method includes: emitting infrared light to the surface of the part to be examined; obtaining an infrared feature map of the vein blood vessels; performing preprocessing filtering on the infrared feature map of the vein blood vessels, and using a deep learning image feature extraction and segmentation algorithm to perform feature extraction and filtering to obtain a 2D feature map of the surface vein blood vessels; obtaining the extension feature and thickness feature of each section of blood vessel, and performing three-dimensional reconstruction to obtain a 3D model of the surface vein blood vessels; performing real-time video capture on the part to be examined to obtain a visible light image of the part to be examined; identifying the features of the part to be examined to obtain a 3D model of the part to be examined; performing three-dimensional mapping on the 3D model of the surface vein blood vessels and the 3D model of the part to be examined to become one model, and obtaining a 3D imaging map of the surface vein blood vessels of the part to be examined. The present invention has the characteristics of real-time imaging, 3D imaging, and convenient operation.

The utility model discloses a cannula for supporting arteriovenous fistula blood vessels and a supporting device, the cannula is used for sleeving a vein anastomosis connection section, and the cannula is provided with a first end close to an artery anastomosis connection section and a second end far away from the artery anastomosis connection section; in the extending direction from the first end to the second end, the sleeve is bent towards one side, and the length of the sleeve is 10-15 mm. According to the cannula for supporting the arteriovenous fistula blood vessel, by designing the bending form of the cannula, the space angle of the vein anastomosis connecting section is optimized, so that the space angle of the vein anastomosis connecting section is limited within the range of 10-20 degrees; therefore, oscillation shear stress of blood on arteriovenous fistula blood vessels can be well reduced, negative effects of artery blood flow are avoided, and then the problem that the arteriovenous fistula blood vessels are narrow or blocked due to the fact that oscillation shear stress concentration areas exist in the arteriovenous fistula blood vessels is reliably solved.

The invention relates to a device designed to ensure the continuity of blood flow by enabling the connection of the aorta and an artificial graft using a clamp mechanism, in cases where an aneurysm (vessel dilation) and / or dissection (tearing of the layers forming the vessel wall) develops in any section of the aorta, and where the damaged aortic tissue is to be replaced with an artificial vessel.

A device (15, 50, 55, 60, 100, 200) for altering blood flow characteristics in a vessel (20), the device (15, 50, 55, 60, 100, 200) comprising: a cuff (10) configured to be surgically positioned around a portion of the vessel (20); a first pad (40) located on an internal wall of the cuff (10), wherein the pad (40): locally reduces a cross-sectional area of a passageway (25) extending through the cuff (10) and / or defines a passageway (25) within the cuff (10) which is non-linear.

The invention discloses a system for blood transfusion and drainage after an abdominal aortic aneurysm intracavitary isolation operation. The system comprises a drainage tube. The drainage tube comprises a support parallel part, a subcutaneous penetrating part and a vein introducing part which are integrally connected. The stent parallel part is a part which simultaneously abuts against the stent in the common iliac artery on one side and the blood vessel wall of the common iliac artery and is parallel to the stent in the common iliac artery on one side; the subcutaneous penetration part is arranged between the stent parallel part and the vein introduction part; the subcutaneous penetrating part is used for being arranged below the body surface skin between the common iliac artery and the femoral vein on the same side; one end of the vein introduction part extends into a femoral vein blood tube, a blood flow flowing channel from a tumor cavity of the abdominal aortic aneurysm to the femoral vein is constructed through the drainage tube, the pressure in the tumor cavity is effectively reduced in a decompression drainage mode, and the risk after the abdominal aortic aneurysm intracavitary isolation operation is reduced.

Described here are devices, systems, and methods for improving blood flow in a vessel. Generally, the method may comprise advancing a catheter into a first vessel proximal to an occlusion in the first vessel and forming a fistula between the first vessel and a second vessel. This may deliver blood flow around an occlusion to ischemic tissues located in the peripheral vasculature.

The invention discloses an arteriovenous fistula flow field correction device with a welding pressure ring and a processing technology of the arteriovenous fistula flow field correction device, and relates to the field of medical instruments. The device is used for supporting blood vessels of subcutaneous autologous internal arteriovenous fistula plasty of the upper arm and the front arm, specifically, the anastomotic artery blood vessels are brachial artery and radial artery, and the vein blood vessels are head veins. The device focuses on the convenience and safety in the actual production and use process, the device structure is innovatively designed, the operation convenience in the operation process is achieved, the implantation position of the device in the body is more accurate, the device is safer to the human body after implantation, and the effect is more obvious. The shaping mold is innovated in the process aspect, the production efficiency is improved, and the production cost is reduced.

The invention discloses a blood circulation simulation device for a vascular intervention operation, and the device comprises a vein simulation pipeline which is provided with a vena cava, a pulmonary vein, and a vein capillary; the artery simulation pipeline is provided with an aorta, a pulmonary artery and an arterial capillary; the heart simulation pump is provided with a left atrium, a left ventricle, a right atrium and a right ventricle; the vena cava is communicated with the right atrium, the pulmonary vein is communicated with the left atrium, the aorta is communicated with the left ventricle, and the pulmonary artery is communicated with the right ventricle. Real blood vessels are simulated by arranging the vein simulation pipeline and the artery simulation pipeline, the left atrium, the left ventricle, the right atrium and the right ventricle of a real heart are simulated by arranging the heart simulation pump, the left atrium, the right atrium, the left ventricle and the right ventricle are alternately contracted in an air pressure control mode, and the contraction state of the heart is truly simulated; a real blood flow state is simulated in the vein simulation pipeline and the artery simulation pipeline, and a real interventional operation environment is provided for training and learning.

The invention discloses an on-site installation type full endoluminal repair system for treating Stanford A-type dissection. The on-site installation type full endoluminal repair system comprises an ascending aorta stent-type blood vessel (ascending main assembly), a coronary artery branch covered stent-type blood vessel (coronary artery assembly) and a self-expanding aorta interventional valve (valve assembly) capable of being installed on site according to needs. The lifting main assembly is divided into a lifting main section and a sinus tube section, the lifting main section is a covered stent, the head end is anchored to an ascending aorta, the tail end is transited to be a concave sinus tube section, embedded branches are arranged at the two ends in a cavity of the covered stent in front of the concave part, openings are formed in the sinus tube section, and a metal bare stent is arranged outside the sinus tube section. The coronary artery branch covered stent is a conical small-caliber covered stent, the near end of the coronary artery branch covered stent is connected with an embedded branch of the lifting main assembly, and the caliber of the far end varies due to left and right coronary arteries. The graft may engage the aortic valve component as desired. The invention is specially used for treating the Stanford A-type dissection lesion of the aorta root, can repair the aortic lesion, reconstruct the bilateral coronary artery and connect the aortic valve as required, and can be produced in batches for emergency operations.