50 results about "Vena cava" patented technology

Tricuspid valve repair devices and associated systems and methods are disclosed herein. A tricuspid valve repair device configured in accordance with embodiments of the present technology can include, for example, a coaptation member configured to be positioned between one or more native leaflets of the tricuspid valve to at least partially fill a space between the native leaflets. The tricuspid valve repair device can further include one or more fixation mechanisms for securing the coaptation member in position between the leaflets. The fixation mechanisms can include clip mechanisms, lock mechanisms, stabilization members, anchors, and / or other structures configured to engage cardiac anatomy local to or remote from the tricuspid valve, such as the native leaflets, the tricuspid valve annulus, the right ventricular outflow tract, the superior vena cava, the inferior vena cava, and so on.

The invention discloses an intermittent occlusion balloon catheter system for treating heart failure. The system comprises a five-cavity double-balloon catheter, the five-cavity double-balloon catheter comprises a cavity tube body, a first balloon arranged in a pulmonary artery and a second balloon arranged in a superior vena cava, and the first balloon and the second balloon are both fixed to the surface of the cavity tube body; a round head is arranged at the far end of the cavity tube body, and the diameter of the round head is not larger than the outer diameter of the catheter. The near end is connected with the extension tube assembly through an injection molding head; the cavity tube body is provided with five cavity channels which are respectively communicated with the first balloon extension tube, the second balloon extension tube, the thermistor extension tube, the far-end extension tube and the near-end extension tube; the injection pump is driven by the stepping motor, and the controller adjusts the advancing and retreating motion period of the stepping motor, so that the injection pump is controlled to charge and discharge liquid to the second balloon. By intermittently blocking the superior vena cava, the heart filling pressure is reduced, and therefore heart hyperemia and volume overload are prevented.

The present invention discloses a PICC catheter positioning and identification device that combines ultrasound guidance with electrocardiogram signal monitoring. The device belongs to the field of image processing and includes: an ultrasound probe for acquiring ultrasound images of blood vessels and PICC catheters during PICC catheterization; electrocardiogram electrodes for acquiring the user's electrocardiogram signals; a signal acquisition and processing unit for acquiring and processing ultrasound images and electrocardiogram signals; an image fusion display unit connected to the signal acquisition and processing unit for fusing the processed ultrasound image with the electrocardiogram waveform on the same screen to obtain fusion display information; a position recognition and alarm unit for analyzing and identifying the real-time position of the PICC catheter based on the fusion display information, and issuing an alarm when it is detected that the PICC catheter has reached the optimal position of the superior vena cava. By integrating ultrasound guidance and electrocardiogram signal monitoring into one device, a technical effect is achieved that helps nurses more accurately and quickly identify whether the PICC catheter has reached the optimal position of the superior vena cava.

A cardiac implant device may include a frame sized for placement at least partially within a blood vessel of a heart, the frame having a proximal end, a distal end, and a midsection, and comprising an outer frame and an inner frame. At least a portion of the inner frame is joined to the outer frame at the distal end of the frame and wherein the inner frame extends away from the outer frame at the midsection of the frame to form a gap between the inner frame and the outer frame. A device may include a sealing skirt extending at least partially along the inner frame and the distal end of the frame.

The invention discloses a hemodynamic monitoring system and a control method for an intermittent occlusion balloon catheter. The monitoring system comprises a blood flow pressure measurement module, a cardiac displacement measurement module, a thrombus monitoring module and an infusion pump control module. The control method comprises the steps that a right atrium and vena cava pressure threshold value is set, the size of a balloon is controlled and adjusted through an infusion pump, the relation between blood flow pressure and the pressure threshold value is continuously monitored, and then the expansion size and time of the balloon are fed back and adjusted; based on an automatic cold solution suction-discharge module, the cardiac displacement change is indirectly measured; in the treatment process, parameter changes such as cardiac displacement, right atrium pressure and vena cava pressure of a patient are measured, and whether the patient recovers hemodynamics or not is monitored, and safe machine withdrawal conditions are met; and the thrombus risk condition near the balloon is analyzed through the thrombus monitoring module. The size and time of the balloon are adjusted through pressure feedback, and the infusion precision is improved; and machine withdrawal judgment conditions are set, so that the treatment effect of the patient is improved.

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.

A cardiac implant device comprises a frame configured for placement at least partially within a blood vessel of a heart, a skirt configured to at least partially enclose the frame, and two or more arms extending from a distal end of the frame.

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.

The utility model relates to a multifunctional catheter for superior vena cava triggering focus mapping and phrenic nerve pace-making, which comprises a catheter body and a spiral electrode tip arranged at the far end of the catheter body, and a plurality of pace-making electrode groups are arranged on the spiral electrode tip. The catheter body and the spiral electrode tip are telescopically arranged in the sheath and can extend out of the open end of the sheath; the spiral electrode tip is in a contraction configuration in the sheath, and can be converted to an expansion configuration when extending out of the sheath and extending into a phrenic nerve pace-making area in the superior vena cava; the starting end of the spiral electrode tip is connected with a center mapping catheter coaxial with the catheter body, and a plurality of mapping electrode sets are arranged on the center mapping catheter. Compared with the prior art, the multifunctional catheter has the advantages that the spiral electrode tip can be stably attached to the inner wall of the superior vena cava, and the multifunctional catheter can be matched with a central mapping catheter to map a superior vena cava trigger range while playing a pace-making role.

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.

A right cardiac assisting device to be percutaneously implanted inside a patient's heart, including an inlet, an outlet, a pump connecting the inlet to the outlet, and being designed to be located inside the right atrium or vena cava of the patient. The assisting device includes at least one support element configured to be secured to a first membrane of the patient's heart by passing through the first membrane, the first membrane separating the right atrium from the pulmonary artery of the patient's by passing through it. The support element tightly cooperates with the outlet to immobilize the pump, the inlet and the outlet inside the patient's heart and enable the patient's blood flow to be driven from the inlet to the outlet through the first membrane.

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.

The invention discloses a capturing device of an inferior vena cava filter and a using method, and relates to the technical field of medical instruments. According to the capturing device of the inferior vena cava filter and the using method, the capturing device comprises a leading-in device, a snare catheter is movably installed in the leading-in device, a snare is movably installed in the snare catheter, a traction hook is movably installed in the leading-in device, and torque devices are installed on the surface of one end of the snare catheter and the surface of one end of the traction hook. According to the inferior vena cava filter, the traction hook provided with the inverted-U-shaped hook is additionally arranged, so that the operation space and angle are not limited, the inferior vena cava filter can be taken out only through one puncture point without assistance of other instruments, and the inferior vena cava filter is easy and convenient to operate, minimally invasive and safe; the operation time is obviously shortened, and the radiation dose of doctors and patients is reduced.

The utility model relates to a recoverable inferior vena cava filter which comprises a recovery column and a vena cava filter body with an unfolded state and a folded state, a recovery hook is arranged on the recovery column, and the vena cava filter body comprises a plurality of first filter rods and a plurality of second filter rods; the first filter rod comprises a first sub-rod, a second sub-rod and a third sub-rod, the top end of the first sub-rod is connected with the recovery column, the tail end of the first sub-rod is connected with the top ends of the second sub-rod and the third sub-rod respectively, and first positioning hooks are arranged at the tail ends of the second sub-rod and the third sub-rod respectively; the top end of the second filter rod is connected with the recovery column, and the tail end of the second filter rod is provided with a second positioning hook. The problems that a traditional umbrella-shaped filter is low in capture rate, prone to deviation and poor in centering performance are solved, double-layer circumferential point contact is adopted to be fixedly attached to the blood vessel wall, good centering performance is guaranteed, and the problems that a traditional cylindrical supporting rod is large in contact area, intimal hyperplasia is likely to be caused, and the filter is difficult to recycle are solved.

The application discloses a kind of multi-organ segmentation systems and colon cancer detection systems based on deep learning, multi-organ segmentation system includes: image processing module, for converting CT image into NIFTI three-dimensional image format, carries out data standardization processing;Again divide several sub three-dimensional images;Multi-organ detection segmentation module is used to the spleen, right kidney, left kidney, liver, aorta, inferior vena cava region in CT image is segmented.The colon cancer detection system includes: image processing module;Detection segmentation module is used to the colon cancer region in PET-CT image is segmented;Quantitative analysis module is used to the standard uptake value of colon cancer region is quantitatively analyzed.The application realizes the segmentation of each region in CT image;While the colon cancer lesion in PET-CT image is segmented, the standard uptake value of lesion region is quantitatively analyzed;Give consideration to the simplicity of operation, the accuracy of segmentation result and quantitative analysis function, realize the accurate segmentation and automatic analysis function of colon cancer region.

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.

Blood flow affecting implant and implantation thereof in superior vena cava, optionally including disintegration of endothelium layer and inducing tissue ingrowth within implant. Implant includes elongated body with optional tubular inner layer forming orifice, shapeable to final orifice diameter for restricting blood flowing therethrough to chosen average flow rate; and / or tubular outer layer provided coaxially around inner layer. Outer layer is formed of second material provided in elastically deformable state for facilitating elastic radial self-expanding from collapsed diameter up to relaxed maximal expanded diameter greater than diameter of inner wall portion of superior vena cava. Inner layer is formed of first material, in plastically or elastically deformable state.

The present invention concerns a filter (1) for a blood vessel, and in particular a vena cava filter, comprising at least two anchoring branches (11) for anchoring the filter in the wall of the blood vessel, the anchoring branches having a fixed end (111) and a free end (112), the fixed ends of the anchoring branches being fixed to one another and the free ends being terminated with a hook (113) oriented toward the outside, characterised in that each of the anchoring branches comprises an anti-transfixion protection (114).

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.

The application provides a vena cava cannula assembly, relates to the technical field of medical devices, and is used for improving the safety of heart surgery. The vena cava cannula assembly comprises a vein pipe body, the vein pipe body has an insertion end and an extracorporeal end in communication, a positioning ring is slidably connected with the vein pipe body, and an umbrella-shaped clamping ring is slidably sleeved on the vein pipe body and located on one side of the positioning ring close to the insertion end. An opening is arranged on the side wall of the umbrella-shaped clamping ring, the umbrella-shaped clamping ring surrounds a clamping space, one side of the clamping space towards the insertion end is provided with a clamping port, and the opening is in communication with the clamping space. Thus, the positioning ring can be prevented from falling off, so that a medical accident can be avoided, and the safety of surgery is improved. Meanwhile, the insertion part of the vein pipe body can be tightened through the sliding of the umbrella-shaped clamping ring, so that a hemostatic effect of preventing blood from flowing out due to a heart wall tear can be achieved, and the surgery efficiency is improved.

The application discloses a reamer for processing 3-4 grade vena cava tumor thrombus, and the reamer comprises a flexible mirror body, a cutting device and an operation auxiliary device. The cutting device comprises an operation section and a cutting part located at the first end of the operation section, and the cutting part is used for twisting and cutting tumor thrombus tissue. The operation section and the flexible mirror body are both hollow pipe bodies, and the second end of the operation section is communicated with the flexible mirror body. Through the arrangement, the cutting part can be sent into the vicinity of the reaming position through the flexible mirror body. Then, through the negative pressure access pipe, the light source pipe, the optical fiber pipe and the perfusion pipe arranged on the operation auxiliary device, the image of the reaming position can be acquired in the operation process, the specific position and shape are determined, the tumor thrombus is quickly twisted and cut through the cutting part, and the cut tissue is discharged through the negative pressure access pipe, so that the reamer can be used for assisting the removal of 3-4 grade vena cava tumor thrombus.

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.