26 results about "Vena cava" patented technology

The invention provides an image-clinical characterization-combined multi-endpoint prognosis evaluation method for transjugular vein intrahepatic portal vein shunt, which comprises the following steps of: constructing a few-label portal vein segmentation module to obtain a preoperative CT portal vein label of a full-dose patient, and extracting deep learning features and radiomics features of the region; establishing a multi-modal interactive representation learning module for implementation, and performing cross-modal fusion with clinical features to form unified representation; and designing a multi-endpoint prognosis prediction module, inputting the data to a plurality of prognosis task decoders for postoperative survival, portal vein pressure gradient, hepatic encephalopathy prediction and the like, and adopting a multi-task learning optimization model to obtain a postoperative multi-endpoint prognosis evaluation result. According to the method, efficient fusion and multi-endpoint prognosis prediction of images and clinical information can be realized under limited labeling, clinical doctors can be assisted in preoperative patient screening and treatment scheme making, and the method has good clinical application value.

The application discloses an ultrasonic imaging system for accurately collecting heart sections in any body position, which comprises a plurality of two-dimensional ultrasonic arrays randomly distributed in space, a multichannel ultrasonic signal collecting module and a three-dimensional ultrasonic imaging module; the plurality of two-dimensional ultrasonic arrays, the multichannel ultrasonic signal collecting module and the three-dimensional ultrasonic imaging module are sequentially connected; wherein the plurality of two-dimensional ultrasonic arrays comprises a plurality of ultrasonic transducer arrays forming sub-area line scanning or sub-area surface scanning or cross surface scanning; the application provides doctors with more detailed images, which is helpful for more accurately positioning and evaluating lesions; can solve the problems of difficulty in collecting correct imaging sections, imaging section changes in motion and the like in wearable ultrasonic heart imaging; is not only suitable for the heart, but also suitable for the brain, the liver, the kidney, the urinary bladder, the abdominal aorta, the inferior vena cava and the like human tissues and parts.

A method for performing a robotic-assisted orthotopic heart transplant includes forming a working port subareolarly by a mini-thoracotomy at a working intercostal space, forming additional ports for robotic arms, and arranging robotic arms through the ports. A first robotic arm with first forceps extends through a second port lateral to a mid-clavicular line, while second and third robotic arms containing an imaging device and second forceps operate through the working port. A fourth robotic arm with scissors or needle holder extends through a third port proximal to an anterior axillary line. The method includes cannulating for cardiopulmonary bypass, opening the pericardium, cross-clamping the aorta, removing the native heart, and performing sequential anastomoses of the donor heart including the left atrium, pulmonary artery, aorta, inferior vena cava, and superior vena cava.

The application discloses a self-adaptive vena cava occlusion balloon ventricular assist system, which comprises a balloon catheter device and a control device. The balloon catheter device comprises a catheter, a balloon arranged on the catheter and close to the proximal end of the catheter, and a joint arranged on the distal end of the catheter. The catheter is provided with a first pressure cavity, a second pressure cavity and a liquid delivery cavity. The first pressure cavity is used for connecting the first blood pressure measuring port and the joint and is connected with the first blood pressure sensor through a first catheter. The second pressure cavity is arranged on the catheter in a lengthwise direction and is used for connecting the second blood pressure measuring port and the joint and is connected with the second blood pressure sensor through a second catheter. The liquid delivery cavity is used for connecting the inside of the balloon and the joint and is connected with a liquid delivery pump through a liquid delivery catheter. A micro pressure sensor is attached to the outer wall of the balloon, and a signal line led out from the micro pressure sensor is connected with a signal acquisition module through a signal extension line. The application can adjust the pressure of the balloon on the blood vessel wall during occlusion according to the change of the vena cava diameter, improve the occlusion effect and avoid damaging the blood vessel.

Systems and methods are provided for treating conditions such as heart failure and / or pulmonary hypertension by at least partially occluding flow through the superior vena cava for an interval spanning multiple cardiac cycles. A catheter with an occlusion device is provided along with a controller that actuates a drive mechanism to provide at least partial occlusion of the patient's superior vena cava, which reduces cardiac filling pressures, and induces a favorable shift in the patient's Frank-Starling curve towards healthy heart functionality and improved cardiac performance. The system may include sensors to determine the degree of occlusion of the superior vena cava. The occlusion system may be used to reduce volume in a heart and facilitate a cardiac procedure. The occlusion system may be used to relieve an overloaded chamber during and / or after deploying a VAD.

The invention discloses a recoverable woven filter and a taking-out device and system, relates to the technical field of interventional medical instruments, and aims to solve the problems that an existing vena cava filter depends on a center hook for grabbing, the taking-out difficulty is large, blood vessels are prone to being damaged, and the taking-out failure rate is high. The recoverable woven filter comprises a hooking piece, a protecting piece and a filtering part, the filtering part is woven by nickel-titanium metal wires to form a proximal section, a middle section and a telecentric section, the proximal section and the telecentric section are open grids with gradually-changed pore diameters, and an anchoring structure is arranged on the outer side of the middle section; the intersections of the metal wire weaving are in surface contact friction locking, and can be integrally contracted under axial traction force. The taking-out device comprises a tube base, a sheath tube and a grabbing mechanism, and the grabbing mechanism clamps any part of the filter through an occlusion head and pulls the filter into the sheath tube. The filter is high in softness, can be clamped and taken out at multiple parts, does not need to depend on a specific hooking piece, is low in alignment requirement, remarkably improves the taking-out success rate, and is suitable for vena cava thrombosis filtration and safe recovery.

Systems and methods are provided for treating conditions such as heart failure and / or pulmonary hypertension by at least partially occluding flow through the superior vena cava for an interval spanning multiple cardiac cycles. A catheter with an occlusion device is provided along with a controller that actuates a drive mechanism to provide at least partial occlusion of the patient's superior vena cava, which reduces cardiac filling pressures, and induces a favorable shift in the patient's Frank-Starling curve towards healthy heart functionality and improved cardiac performance. The system may include sensors to determine the degree of occlusion of the superior vena cava. The occlusion system may be used to reduce volume in a heart and facilitate a cardiac procedure. The occlusion system may be used to relieve an overloaded chamber during and / or after deploying a VAD.

The invention discloses an ultrasonic imaging method and an ultrasonic imaging system for a fetus in the middle-late pregnancy period. The method comprises the following steps: S220, obtaining three-dimensional ultrasonic data of the fetus in the middle-late pregnancy period; s230, according to the three-dimensional ultrasonic data, the long axis direction of the body area of the fetus in the middle-late pregnancy period is determined; s540, extracting information of a mid-late pregnancy target feature structure of the fetus from the three-dimensional ultrasonic data, wherein the mid-late pregnancy target feature structure comprises at least one of the following parts: gastric vesicle, spine bone, liver, umbilical vein, descending aorta, inferior vena cava, umbilical cord insertion position, umbilical cord, anterior abdominal wall, bladder, legs, umbilical artery and gallbladder; and S560, extracting at least one abdominal standard section of the fetus in the middle-late pregnancy period from the three-dimensional ultrasonic data according to the information of the long axis direction and the middle-late pregnancy target feature structure, and displaying the extracted abdominal standard section. According to the ultrasonic imaging method and the ultrasonic imaging system, the abdominal standard sections of the fetuses in the middle-late pregnancy period are automatically extracted according to the three-dimensional ultrasonic data collected at a time, a doctor does not need to manually extract the abdominal standard sections one by one, and the efficiency of extracting the abdominal standard sections and the quality of the extracted abdominal standard sections are improved.

Methods and devices for supporting circulation. The methods may include positioning a blood pump in the arterial vasculature or the venous vasculature. The methods may include positioning a pump portion of the blood pump in a descending aorta, an inferior vena cava, a renal artery, and / or a renal vein. The methods include delivering a pump portion of a blood pump to a target location and rotating one or more impellers to move blood through the pump portion.

Devices, systems, and methods provide measurements of continuous cardiac output (CCO). A pulmonary artery (PA) catheter—for example, a Swan-Ganz catheter—can be utilized to obtain multiple pressure measurements simultaneously from different locations within the circulatory system, such as in a pulmonary artery, right atrium, right ventricle, vena cava, etc. Continuous pressure measurements from multiple points can provide estimates of heart rate and stroke volume allowing computation of cardiac output along with each beat of the heart without the need for thermodilution.

Apparatus and methods are described including reducing cardiac preload of a subject by partially occluding a vena cava of the subject at an infra-renal location. One or more physiological parameters of the subject are monitored, the one or more physiological parameters including lower body venous pressure, central venous pressure, central venous blood flow, renal venous pressure, cardiac diameter, cardiac volume, arterial pressure, and / or arterial blood flow. An extent to which the vena cava is occluded at the infra-renal location is modulated, responsively to the one or more physiological parameters. Other applications are also described.

The invention relates to a mapping catheter. Comprising a first tube section, a plurality of electrode sets are arranged at the far end of the first tube section and comprise the first electrode set, the second electrode set and the third electrode set, the first electrode set is configured to map electric signals of the right ventricle apex part, the second electrode set is configured to map His beams, and the third electrode set is configured to map His beams; the third electrode group is used for detecting electric signals in the inferior vena cava of the heart; the first pipe section is an elastic pipe section, and one of a reamed hole or a boss is arranged at the near end of the first pipe section in the axial direction of the first pipe section; the far end of the second pipe section is provided with the other one of a reamed hole or a boss in the axial direction of the second pipe section, the boss is inserted into the reamed hole, and the first pipe section and the second pipe section are connected through welding; the second pipe section and the first pipe section are made of the same material, a supporting layer is arranged in the second pipe section, and the rigidity of the supporting layer is larger than that of the first pipe section. The mapping requirements of the mapping catheter on the His bundle and the right ventricle can be met, and the application range of the mapping catheter can be widened.

An intravascular ultrasound “(IVUS”) device having an intrinsic or attachable needle guide is disclosed. In some embodiments, a sheath having a needle guide is used in connection with an IVUS device. The devices may be used in performing minimally invasive image-guided surgical procedures. The devices may be configured to maintain a needle placed through guide in the plane of the IVUS-array to improve visualization of the needle. In some embodiments, the device is used to facilitate the creation of a tract through the liver from the inferior vena cava to the portal vein using IVUS-guidance in a direct intrahepatic portocaval shunt procedure. The devices, systems, and methods can improve patient safety by decreasing the risk of off-target punctures, decrease procedure times, and allow procedures to be performed from a single access site.

A device for capturing debris from blood flow in a blood vessel, the device including an expandable frame shaped and sized to expand against walls of a blood vessel, a debris obstacle attached to the frame, and a control wire attached to the debris obstacle, configured to control opening of the debris obstacle, wherein the control wire extends from the debris obstacle upstream in relation to a direction of blood flow in the blood vessel. A method for preventing debris from reaching a lung, the method including inserting a device for capturing debris to a location in a vein, controlling debris traps in the device to open and collect debris from the vein, performing the medical procedure, and extracting the device for capturing debris from the body. Related apparatus and methods are also described.

The utility model discloses a kind of extracorporeal circulation intubation forceps for small incision operation, including left forceps and right forceps, left forceps one end is set up left pipe structure of adjustable pipe angle of opposing, right forceps one end is set up and the right pipe structure of corresponding left pipe structure;Left adjusting part one side is set left arc clamping plate, right adjusting part one side is set right arc clamping plate;Left forceps and right forceps are connected by self-locking structure, the application can be clamped to intravenous cannula, the angle of intravenous cannula can be adjusted simultaneously, intravenous cannula is accurately inserted into vena cava, the accuracy of intravenous cannula placement is improved, and the clamping force of intravenous cannula can be automatically locked, prevent intravenous cannula from loosening, and facilitate to push intravenous cannula.

A single vena cava crossing tricuspid valve device comprises at least one stent structure; a first end configured for implantation in the inferior vena cava (IVC) and anchoring the device in the IVC, optionally at least partially covered; a second end configured for implantation in the superior vena cava (SVC) and anchoring the device in the SVC, optionally at least partially covered; a first valve connected to at least a portion of the first end so that when the CCTD is implanted, it is located in at least a portion of the right atrium (RA) above the IVC; a second valve connected to at least a portion of the second end so that it is located in at least a portion of the right atrium (RA) below the SVC or at least partially within the SVC, below the azygos vein; and sealing means.

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.

This invention discloses a systemic circulation venous simulation system, comprising a right ventricular simulation component, an arterial compliance simulation component, a venous vessel module, a damping module, a throttling valve, a collapsible venous segment, a venous compliance simulation component, a right atrial simulation component, a drive module, and a data acquisition module. The right ventricular simulation component simulates the pumping function of the right ventricle; the arterial compliance simulation component simulates the elastic energy storage characteristics of the arterial system; the venous vessel module includes a collecting chamber, a superior vena cava return vessel, an inferior vena cava return vessel, and a vena cava confluence conduit; the collapsible venous segment prevents excessive negative pressure in the venous system; the venous compliance simulation component reduces the impact of right atrial pressure fluctuations on the venous vessels; and the right atrial simulation component simulates the right atrial filling state through internal volume changes. This simulation system can be used for in vitro testing of vena cava intervention devices.

In some embodiments, a method includes a shaft having a side catheter guide attached thereto via a guide coupler into an inferior vena cava and a superior vena cava such that the guide coupler is disposed in a right atrium, and applying a distal force to a proximal portion of the side catheter guide such that a distal end of the side catheter guide deflects laterally about the guide coupler towards a septum. The method further includes extending a side catheter that is disposed within the side catheter guide distally from the side catheter guide towards and into contact with the septum. The method further includes, with the side catheter in contact with the septum, extending a septum penetrator that is slidably disposed within the side catheter distally from the side catheter such that the septum penetrator pierces the septum.

The utility model relates to the technical field of flushing and sealing tube adapters, in particular to a flushing and sealing tube adapter of a double-cavity venous catheter. The flushing and sealing tube adapter of the double-cavity venous catheter comprises a three-way connector and a liquid separation branch tube, and the box-shaped three-way connector is provided with a three-way input end and a three-way output end which are communicated with each other; the three-way input end is matched with the end part of the injector, so that the end part of the injector can be directly and fixedly connected with the three-way input end; a branch pipe seat is arranged at the liquid separation input end, so that the liquid separation branch pipe is separably connected with the three-way output end, and the three-way output end is matched with the branch pipe seat; and an infusion needle head is arranged at the liquid separation output end. According to the utility model, the main cavity pipeline and the side cavity pipeline can be simultaneously flushed by one injector, the number of the connecting ports of the double-cavity venous catheter can be increased according to the requirement, and the number of the connecting ports of the double-cavity venous catheter can be temporarily increased to four or more, so that the conveying requirements of various medicaments can be met.

The embodiment of the present specification provides a vena cava filter, comprising: a stent part having a telescopic state, being in contact with a vena cava wall after being unfolded, and being formed with a hollow channel; a filter part being arranged in the hollow channel, one end of the filter part being in a radial structure and being connected with the stent part, the other end of the filter part being in a converging state and being suitable for collecting embolic materials; and the filter part comprising: a degradable structure and a non-degradable coating layer coated on the degradable structure, and the degradable structure being suitable for being degraded after the non-degradable coating layer is removed. By using the above scheme, the transformation process of the vena cava filter can be controlled, and the embolic materials in the vena cava wall can be more effectively treated.

The invention discloses a vena cava occlusion type ventricular assist system. The vena cava occlusion type ventricular assist system comprises a balloon catheter device and a control processor. The balloon catheter device comprises a six-cavity catheter, and the six-cavity catheter is provided with a first balloon and a second balloon. The six-cavity catheter is provided with a first pressure cavity, a second pressure cavity, a third pressure cavity, a liquid conveying cavity, a gas conveying cavity and a heart monitoring cavity which are not communicated with one another. The near port of the first pressure cavity serves as a first pressure measuring port and is close to the far end of the first balloon. The near port of the second pressure cavity serves as a second pressure measuring port and is close to the near end of the first balloon. The near port of the third pressure cavity serves as a third pressure measuring port and is located at the near end of the six-cavity catheter. A near port of the infusion cavity serves as an infusion port and is located in the first balloon. The near port of the air delivery cavity serves as an air delivery port and is located in the second balloon. The heart monitoring cavity near port serves as a monitoring port and is arranged close to the far end of the second balloon. The problems that the blocking and emptying duration is fixed, and the treatment termination opportunity cannot be reasonably controlled are solved.

Provided is a surgery assistance device that creates a three-dimensional image of a tissue shape of an affected area of ​​a patient to improve the image of the tissue structure when a doctor performs surgery, and assists in accurate selection of surgical tools to be used in surgery on the basis of the image. The surgery assistance device comprises: a three-dimensional spatial data generation unit that acquires a tomographic image of a subject's chest tissue and generates three-dimensional spatial data of the tissue from the tomographic image; a spatial feature detection unit that detects spatial features of a space into which a surgical tool is to be introduced by recognizing, as a target area of the subject from the three-dimensional spatial data, shapes of the aorta, pulmonary artery, inferior vena cava, left atrium, right atrium, or intracardiac valves, or the position of an entrance into a blood vessel or intracardiac structure to be treated; a measurement unit that measures, on the basis of the spatial features, multiple angles and distances for introducing the surgical tool into the tissue of the subject; and a presentation unit that presents the shape of a surgical tool suitable for introduction into the tissue of the subject on the basis of one or more angles and distances.

The utility model provides an inferior vena cava inner diameter monitor, and relates to the technical field of medical instruments. The monitor comprises a B-ultrasonic developing assembly which comprises a B-ultrasonic probe and a host which are matched with each other, and the host is provided with a displayer used for displaying images; the connecting assembly comprises a connecting plate and a corrugated pipe capable of being bent and deformed, the connecting plate is in sealing fit with one port of the corrugated pipe, the connecting plate is provided with a through hole communicated with the inner space and the outer space of the corrugated pipe, and the detecting end of the B-ultrasonic probe is rotatably arranged in the through hole; the B-ultrasonic probe is used for performing ultrasonic detection towards the internal space of the corrugated pipe, and the handle end of the B-ultrasonic probe extends towards one side far away from the corrugated pipe; and the adhesive tape is arranged on the corrugated pipe. Compared with a traditional central venous indwelling catheter operation detection method, the monitor does not bring pain to a patient, and the infection risk is avoided.

The utility model provides a precision laser welding device for a vena cava stent, which comprises a hollow mounting plate, a mounting groove used for placing a precision laser welding device body is arranged at the top of the mounting plate, cooling mechanisms are arranged below the mounting plate, the cooling mechanisms are sequentially connected through water pipes, and the water pipes are connected with the mounting plate. A first adjusting assembly slides on the bottom wall of the mounting plate, and one end of the water pipe penetrates through the surface of the mounting plate and is buckled with the surface of the first adjusting assembly; one side of the mounting plate is in threaded connection with two second adjusting assemblies used for adjusting the layout of a water pipe, each adjusting assembly comprises a screw rod and a handle fixed to one end of the screw rod, and the other end of each screw rod penetrates through the surface of the fixing plate and is attached to the surface of the first adjusting assembly. And by arranging the first adjusting assembly and the second adjusting assembly, arrangement of the water pipes in the mounting plate can be optimized, operation is easy, and the using effect is good.

Embodiments of the present disclosure provide for tricuspid insufficiency treatment devices and associated systems and methods thereof and include a tubular vena cava member which includes graft material, the member being implantable in a vena cava of a patient, one or more fenestrations and associated one or more blocking members arranged to block and unblock the fenestration and normally open thereto.