37 results about "Inferior vena caval" patented technology

An implantable system for monitoring a hydration state of a patient and adjusting fluid removal from the patient includes a pressure sensor implantable within an inferior vena cava of the patient and a processor. The pressure sensor senses and generates an output representative of a baseline inferior vena caval pressure value of the patient and chronically senses and generates outputs representative of an inferior vena caval pressure value of the patient. The processor compares differences between the baseline inferior vena caval pressure value and subsequent inferior vena caval pressure values. The processor can reside in another implantable device or in an external device / system.

The invention relates to a transcatheter heart valve replacement (A61F2 / 2412), and in particular Compression Capable Annular Frames for a side delivered transcatheter prosthetic heart valve having a annular support frame having compressible wire cells that facilitate rolling and folding the valve length-wise, or orthogonally to the central axis of the flow control component, allowing a very large diameter valve to be delivered and deployed to the tricuspid valve from the inferior vena cava or superior vena cava, or trans-atrially to the mitral valve, the valve having a height of about 5-60 mm and a diameter of about 25-80 mm, without requiring an oversized diameter catheter and without requiring delivery and deployment from a catheter at an acute angle of approach.

Systems and methods are disclosed that provide for regular, periodic or continuous monitoring of fluid volume based on direct measurement of an inferior vena cava (IVC) physical dimension using a wireless measurement sensor implanted in the IVC. By basing diagnostic decisions and treatments on changes in an IVC physical dimension, information on patient fluid state is available across the entire euvolemic range of fluid states, thus providing earlier warning of hypervolemia or hypovolemia and enabling the modulation of patient treatments to permit more stable long-term fluid management.

Funnel-trap type devices or systems made of braid are described for capture and retrieval or, instead, capture and subsequent release of Inferior Vena Cava (IVC) filters or other medical devices. Delivery and / or retrieval devices, kits in which they are included, methods of use and methods of manufacture are all contemplated.

The present invention relates to an assembly for the tricuspid orifice of a human heart, comprising an external frame (100) connected to an internal stent (200) carrying a tricuspid valve bioprosthesis (210) and a sealing skirt (610). The external frame (100) is configured to hold position in the native tricuspid ring. The internal stent (200) is connected to the external frame by one or more fixing strands. The sealing skirt (610) covers the interstitial space existing between the external frame (100) and the internal stent (200). Developments are described which include in particular the useof a deformable zone of the frame, various alternative embodiments of the sealing skirt, the use of a frame composed of multiple sub-sections, the use of fixing strands between the stent and the frame, elements for fixing the assembly to the native tissue, the use of sensors and / or actuators, and also the use of a stent in the inferior vena cava. Method aspects are described.

A medical device for retrieving an inferior vena cava filter from an inferior vena cava having a handle having a distal end, wherein a longitudinal axis is defined thereby; a grasping assembly coupled to the handle, wherein the grasping assembly comprises a grasper for grasping the inferior vena cava filter positioned within the inferior vena cava, and an articulation assembly coupled to the grasping assembly for causing the grasping assembly to move laterally with respect to the longitudinal axis of the handle. Methods of retrieving an inferior vena cava filter from an inferior vena cava are also disclosed.

The embodiments described relate to retrieving temporary Inferior Vena Cava (IVC) filters and other endovascular implants or foreign bodies. Features are provided for effective actuation in closing aninner aperture of the embodiments.

The invention discloses a simulation training device for an atrial fibrillation radiofrequency ablation operation. The simulation training device comprises a controller, a driver, an execution motor,a motion conversion mechanism, a motion platform, an atrial model and a femoral vein-to-inferior vena cava model; the placement positions of the atrial model and the femoral vein-to-inferior vena cavamodel accord with a human anatomical structure, and the atrial model is fixed on the motion platform; the controller is connected with the driver, a pulse output port of the driver is connected withthe execution motor, and the driver reads a control program of the controller and drives the execution motor to move; the execution motor drives the motion platform to reciprocate in the front midlinedirection of a human body in an anatomical structure of the human body through the motion conversion mechanism. The simulation training device for atrial fibrillation radiofrequency operation can accurately and truly simulate the displacement influence of breathing of a patient on the atrium in an actual operation, and ablation big head displacement and pressure change caused by displacement.

The invention belongs to the technical field of medical treatment, and provides a capacity management device and equipment for emergency treatment and a storage medium. The device comprises a heart evaluation unit which is used for evaluating whether a patient has an organic heart disease according to an image of a heart apex four-cavity heart tangent surface; a parameter determination unit, which is used for determining a left ventricular ejection fraction LVEF value according to the image of the long-axis section beside the sternum and determining the maximum inner diameter of the inferior vena cava and the collapse rate of the inferior vena cava according to the image of the inferior vena cava section under the xiphoid process when the patient is assessed to have no organic heart disease; a score calculation unit which is used for determining scores corresponding to the left ventricular ejection fraction LVEF value, the inferior vena cava maximum inner diameter and the inferior vena cava collapse rate; and a liquid management scheme determination unit which is used for searching a liquid management scheme corresponding to the determined score and carrying out volume management on the patient according to the searched liquid management scheme. According to the method, the cardiac organic safety problem of the patient can be effectively avoided, and the liquid management scheme of the patient can be simply, efficiently, safely and accurately determined.

An absorbable vascular filter is disclosed for deployment within a vessel for temporary filtering of body fluids. An embodiment is configured for the placement of such absorbable vascular filter within the inferior vena cava (IVC) to filter emboli for the prevention of pulmonary embolism (PE) for a limited duration in time. Once protection from PE is complete, the filter is biodegraded according to a planned schedule determined by the absorption properties of the filter components. Hence the temporary absorbable vascular filter obviates the long term complications of permanent IVC filters such as increased deep vein thrombosis, neighboring organ puncture from filter fracture and embolization while also circumventing the removal requirement of metal retrievable IVC filters.

Funnel-trap type delivery and / or retrieval devices for Inferior Vena Cava (IVC) filters or other medical implants are described with associated sheaths. The sheaths are used in progressive recapture and / or embolic protection methods or in association with such features.

Funnel-trap type delivery and / or retrieval devices for temporary Inferior Vena Cava (IVC) filters or other medical implants or foreign bodies are described. These may employ a locking sheath or a proximal-aperture capture feature or features for IVC filter (or other device) retrieval.

The invention discloses a device for interventional therapy of adult congenital heart disease under the guidance of echocardiogram. The device comprises a path finding guide wire and a right heart scale catheter, and the path finding guide wire comprises a guide wire AB section, a guide wire BC section, a guide wire CD section, a guide wire DE section, a guide wire EF section, a guide wire FG section and a guide wire GH section. By arranging the path finding guide wire and guide wire scales, the probability of entering small vessels along the path can be remarkably reduced by adopting a U-shaped guide wire head. When the path finding guide wire is withdrawn to the middle of the right heart scale catheter, the right heart scale catheter can change the advancing direction of the path findingguide wire through rotation, and therefore it is guaranteed that the path finding guide wire safely passes through inferior vena cava, superior vena cava, atrial septum, atrioventricular valve, pulmonary artery and other parts and reaches a preset position under echocardiogram monitoring. Conditions are created for follow-up of the matched right heart scale catheter to a target site and measurement of the length of the matched right heart scale catheter entering the body, and it is in a safe path that the matched right heart scale catheter is pushed out of a purple area of the routing guide wire along the routing guide wire.

Implantable devices for continuously monitoring vascular lumen dimensions, in particular in the inferior vena cava (IVC) for determining heart failure status of a patient. Related therapy systems as well as monitoring and therapy methods are also disclosed. Devices include active or passive marker elements placed in contact with, adhered to or injected into the vessel wall to generate or reflect signals from which lumen diameter may be determined. Disclosed devices may be fully implantable and self-contained including capabilities for wirelessly communication monitored parameters.

The invention discloses an anastomosis cannula for establishing a rat inferior vena cava replacement model. The anastomosis cannula comprises a first silica gel hose, a second silica gel hose, a wrapping outer pipe, a spiral soft wire, a guide positioning wire, a guide hole, a fixed strip, a pressure spring, a movable strip, a fixed ring, a fixed strip frame, a connecting block, a threaded rod, a knob disc, a connecting sleeve, a connecting soft rope, a movable through groove, an inclined rod, a pressing strip, a mounting screw, a soft ring, a positioning sleeve, a pull rope, a first bearing, a lantern ring, a concave hole, a second bearing, a spiral spring and a bolt. The nut comprises a nut base, a strip-shaped cavity, a silica gel protrusion, a deformation inner cavity and a hinge shaft. The anastomosis cannula has the advantages that the anastomosis cannula serves as a limiting and supporting assembly of the donor vein, the donor vein section is turned outwards and reversely folded to the cannula, the supporting and fixing effects are achieved, blood vessels at the two broken ends of a donor and a receptor can be well combined, the operation time is greatly shortened, postoperative bleeding and anastomotic stoma stenosis are reduced, and the operation success rate and the model stability are improved.

The invention belongs to the technical field of ligation or pressing for the in-vivo tubular part, and discloses an inferior vena caval blocking device for minimally invasive cardiac surgery. For thedevice, a side hole is arranged in a guide head at the front end of a guide device, a traction line is fixed on the side hole and reaches the rear end from the inside of the guide device, a function catheter attaches to one side, with the side hole, of the outer wall of the guide device, a blocking belt is arranged in the function catheter, and a locking device is arranged on the blocking belt; ahollow handle is arranged at the rear end of the guide device, and traction line fixing buttons are arranged on the hollow handle; the function catheter attaches to one side, with the side hole, of the outer wall of the guide device; and the hollow handle is provided with the two traction line fixing buttons, and the two traction line fixing buttons are axially symmetric on the hollow handle. Forthe inferior vena caval blocking device for minimally invasive cardiac surgery, in the limited operation space, the inferior vena cava is efficiently and rapidly separated, the blocking belt sleeves for realizing blocking, and then the belt head end of the blocking belt passes through the locking device for realizing locking. The surgery efficiency is effectively improved, the complication and surgery time are reduced, in addition, the device has the advantages that the structural design is reasonable, the use is convenient and safe, and thus the device is suitable for being popularized for use.

The present disclosure is directed to an Inferior Vena Cava (IVC) filter apparatus and related methods. The IVC filter apparatus comprises a body having a proximal hook thereon. A plurality of filter legs extends away from the proximal hook. A distal hook is position interior to at least a portion of the plurality of legs.

The inferior vena cava stent is formed by combining a stent upper end, a stent middle section, a stent lower end and stent supporting bodies, the stent supporting bodies comprise the left stent supporting body and the right stent supporting body which are different in height, and the stent supporting bodies have certain elasticity so that the stent supporting bodies can be fixed to the right atrium inner wall and the atrioventricular opening tissue wall; but the elasticity is not too large to prevent the atrial wall from being punctured; the stent middle section is provided with an inner surface and an outer surface which are different in finish degree, and in the implanting process of the inferior vena cava stent, the implanting position can be adjusted in real time and released accurately through matching of developing marks, so that the stent is more attached to the anatomical structure of the inferior vena cava of the human body; due to the special shape design of the left stent supporting body and the right stent supporting body, the stent is more attached to the inner wall of a right atrium and the tissue wall of an atrioventricular opening, the supporting effect of the stent is further enhanced through the frosted rough outer surface of the middle section of the stent and the flat barbs at the lower end of the stent, and implantation is safer and more reliable.

The invention provides a thoracoscope-assisted coronary artery bypass transplantation training model and a manufacturing method thereof, and relates to the technical field of animal specimen models. The manufacturing method comprises the following steps: providing a whole set of internal organs of an animal, ligating superior vena cava, separating inferior vena cava, thoracic aorta and esophagus, inserting a first tube is inserted into the right atrium through the inferior vena cava, inserting a second tube to the right ventricle through the proximal end of the pulmonary artery, inserting a third tube to the left ventricle through the left auricle, connecting the second tube with the third tube, and inserting a fourth tube through the aorta to obtain the training model. The technical problems that a single isolated organ is poor in training effect, living animal training is high in cost and small in convenience, a box type simulator is small in training skill coverage range, and a 3D simulator is poor in simulation effect are solved. The technical effects that the animal organ combination model with the adjacent organs and the complete blood vessels is provided for the doctor, materials are convenient and low in cost, the doctor obtains real and convenient skill training, and the operation touch sense and force feedback are guaranteed are achieved.

The invention relates to a balloon catheter for transjugular intrahepatic portosystemic shunt, and belongs to the technical field of a medical apparatus. The balloon catheter comprises a catheter anda distensible balloon, wherein the catheter penetrates through the balloon, and is fixedly connected with the balloon; the balloon catheter also comprises radiopaque markers, wherein the radiopaque markers are distributed in an equal spacing manner on the catheter in the axial direction of the catheter, and lengths of the radiopaque markers are consistent; and the radiopaque markers are located inthe balloon and close to the balloon. Trough balloon distension and portography, relative positions among inferior vena cava, hepatic veins and portal veins can be shown, and through counting of thenumber of the radiopaque markers among the inferior vena cava, the hepatic veins and the portal veins, the distances among the inferior vena cava, the hepatic veins and the portal veins can be obtained; and further, operation doctors are helped to reasonably select the length of a special stand for TIPS and determine the position of the special stand for TIPS.

The invention relates to a method and system for processing an inferior vena cava image and a storage medium, and the method comprises the steps of receiving a medical image which is collected by an ultrasonic probe and depicts the inferior vena cava of a human body; processing the medical image using a multi-tasking deep neural network to produce a segmentation output, which includes a contour of the inferior vena cava, and a quality classification output, which is indicative of a quality condition of the medical image. According to the invention, the method achieves the segmentation of the inferior vena cava of the medical image, achieves the evaluation of the quality condition of the medical image, and facilitates the judgment of the segmentation and subsequent processing reliability.

The invention discloses an inferior vena cava thrombus filter convenient for thrombus ablation. The inferior vena cava thrombus filter comprises an outer sleeve, one end of the outer sleeve is provided with a console, the other end of the outer sleeve is provided with a filtering assembly used for filtering thrombus, and the outer sleeve is internally provided with a driving catheter used for driving the filtering assembly to be unfolded and folded. A movable groove is formed in the outer sleeve, the driving guide pipe is slidably connected in the movable groove in a sleeved mode, the driving guide pipe is driven by the telescopic driving unit to achieve axial movement in the outer sleeve, and a medicine spraying assembly used for spraying medicine is arranged at an opening in the front end of the filtering assembly. The inferior vena cava thrombus filter has the beneficial effects that 1, in the vein, blood is filtered through the filtering assembly, so that thrombus in the blood is blocked; 2, the medicine spraying heads which are distributed circumferentially are arranged at the front end of the filtering assembly, and thrombus in the blood can be sprayed and melted.