23 results about "Descending aorta" patented technology

The percutaneous intervention type axial flow blood pump comprises an impeller assembly, a flexible shaft transmission assembly and a handle assembly, the impeller assembly and the handle assembly are connected through the flexible shaft transmission assembly, the flexible shaft transmission assembly comprises a flexible shaft, a transition sleeve and a protective sleeve, the transition sleeve is connected with a flow guide tail cone of the impeller assembly, and the protective sleeve is connected with the impeller assembly. One end of the protective sleeve is fixed to the inner wall of the transition sleeve, the other end of the protective sleeve is connected with the handle assembly, the handle assembly is provided with an in-vitro micro motor in transmission connection with one end of the flexible shaft, and the other end of the flexible shaft is connected with an impeller rotor of the impeller assembly. The impeller assembly and part of the flexible shaft transmission assembly of the axial flow blood pump are percutaneously implanted into the body of a patient, the handle assembly is located outside the body, and the impeller assembly is kept fixed in the descending aorta through an elastic support of the impeller assembly. The axial flow blood pump adopts an in-vitro micro motor and flexible shaft transmission mode, and the problems that the temperature rise of an axial flow blood pump with a built-in motor is too high, abrasion particles are separated out, and fault inspection is not convenient are solved.

Described herein are pumps that linearly reciprocate to assist with circulating blood within the body of a patient. Red blood cell damage may be avoided or minimized by such linear pump movement. The linearly reciprocating movement may also generate a pulsatile pumping cycle that mimics the natural pumping cycle of the heart. The pumps may be configured to reside at various body locations. For example, the pumps may be situated within the right ventricle, the left ventricle, the ascending aorta, the descending aorta, the thoracic aorta, or the abdominal aorta. In some instances, the pump may be deployed within the venous circulation. In other instances, the pump may reside outside the patient.

This invention discloses an automated multi-parameter assessment method, device, and medium for aortic imaging based on three-dimensional images. The method includes acquiring three-dimensional chest CT images and preprocessing them; extracting and optimizing an initial centerline based on the obtained three-dimensional vascular mask; dividing the initial centerline into ascending aorta, aortic arch, and descending aorta segments using the optimized initial centerline and the opening positions of branches on the aortic arch; extracting the average CT value of the adipose tissue surrounding the descending aorta based on the divided descending aorta segments; constructing orthogonal cross sections, performing dimensionality reduction and projection processing on each cross-sectional mask, and calculating the major and minor axes based on the farthest point pairs, outputting the major axis diameter sequence of each cross section; calculating the aortic calcification load, assessing aortic dilation and morphological variations, and evaluating the inflammatory status of the perivascular adipose tissue; and generating a comprehensive report of indicators. This invention fully utilizes existing imaging resources, improving the utilization efficiency and clinical value of medical imaging data.

System, devices and methods for providing a blood-free operative region for aortic arch repair procedures. Various embodiments disclose occlusion of the descending aorta, the innominate artery, the left carotid artery and the left subclavian artery while also providing sufficient perfusion distal of the occluding balloons. Various embodiments disclose performing aortic arch repair procedures while the patient's body temperature is maintained an normothermia (about 36 degrees C. to about 37.5 degrees C.). Other embodiments disclose performing aortic arch repair procedures while the patient's body temperature is maintained at slight hypothermia (about 30 degrees C. to about 34 degrees C.).

This invention discloses a non-invasive method for estimating central aortic pressure (PWV) driven by a vascular tree network, relating to the field of cardiovascular hemodynamic modeling. The method includes: collecting clinical data and scaling the vessel length and reference area; calculating the flow waveforms of the aorta and its branches based on the 4D-Flow MRI velocity field to determine the blood flow distribution ratio; constructing an eight-branch vascular tree network model based on the pressure propagation path from the aorta to the brachial artery; selecting a section on the descending aorta's central axis to calculate the flow waveform and inversely calculating PWV; constructing a dataset using sensitivity analysis and one-dimensional positive problem simulation to pre-train the neural network; performing PINN patient-specific fine-tuning on the model; extracting the aortic pressure waveform using the fine-tuned model, calculating the central aortic pressure value, and outputting patient-specific parameters and distribution results. The input waveform constructed based on non-invasive clinical data in this invention can adapt to different patient-specific differences, significantly improving the model's individualization and clinical compatibility.

The application discloses a rotating speed regulation system for a modular intra-aortic axial flow pump. The system comprises a flow detection device, a controller and a blood pump driver. The flow detection device is connected with the controller and is used for measuring the descending aorta flow. The axial flow blood pump of the modular intra-aortic axial flow pump is connected with the controller via the blood pump driver, and the blood pump driver is used for driving the axial flow blood pump to operate. The controller is used for executing relevant steps to adjust the rotating speed of the axial flow blood pump to the optimal rotating speed operation. The application can accurately regulate the rotating speed of the axial flow blood pump of the modular intra-aortic axial flow pump, so that the axial flow blood pump always operates at the optimal rotating speed, thereby exerting the best blood flow hemodynamic support effect and minimizing the additional harm to the patient.

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.

This application provides a ventricular assist interventional system, relating to the field of medical device technology, comprising a diaphragm pump, a first catheter, a balloon, and a pneumatic actuator. A balloon for implantation into the descending aorta to assist the heart is disposed on the surface between a bidirectional valve on the first catheter and the proximal end of the first catheter. The distal end of the first catheter is inserted into the ventricle. The balloon is connected to the pneumatic actuator via an air circuit. The proximal end of the first catheter is connected to the blood chamber of the diaphragm pump, and the medium chamber of the diaphragm pump is connected to the pneumatic actuator via an air circuit. A single pneumatic actuator simultaneously drives the diaphragm pump to aspirate or pump blood and to inflate or deflate the balloon. The inflation and deflation cycle of the balloon is synchronized with the diaphragm pumping action, thereby precisely corresponding to the systolic and diastolic phases of the heart. This reduces the number of components used in the ventricular assist interventional system and improves the technical problem of existing ventricular assist interventional systems being bulky and easily increasing the burden on patients.

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.

The application aims to provide a blood circulation assisting system capable of generating pulsating blood flow and guaranteeing body functions, comprising a first blood circulation supporting unit located in a heart chamber of a patient and a second blood circulation supporting unit located in a descending aorta of the patient, the first blood circulation supporting unit pumping blood in the heart chamber to the aorta, and the second blood circulation supporting unit generating pulsating blood flow by periodically contracting and expanding to squeeze blood, and partially blocking the blood vessel when expanding. When the second blood circulation supporting unit periodically expands to squeeze blood, it does not completely block the blood vessel, but leaves a part of the blood flow passage, so as to allow part of the blood to pass through, prevent the ascending aorta pressure from suddenly rising, and prevent the blood from flowing back to the left ventricle, and also prevent the second blood circulation supporting unit from moving, so as to guarantee the pulsating effect and prevent unnecessary damage to the inner wall of the blood vessel.

Described herein are pumps that linearly reciprocate to assist with circulating blood within the body of a patient. Red blood cell damage may be avoided or minimized by such linear pump movement. The linearly reciprocating movement may also generate a pulsatile pumping cycle that mimics the natural pumping cycle of the heart. The pumps may be configured to reside at various body locations. For example, the pumps may be situated within the right ventricle, the left ventricle, the ascending aorta, the descending aorta, the thoracic aorta, or the abdominal aorta. In some instances, the pump may be deployed within the venous circulation. In other instances, the pump may reside outside the patient.

The invention provides an auxiliary ventricular intervention system, which relates to the technical field of medical instruments and comprises a diaphragm pump, a first catheter, a balloon and a pneumatic host. A balloon used for being implanted into the descending aorta to assist the heart is arranged on the surface between a two-way valve on a first catheter and the near end of the first catheter, the far end of the first catheter is used for being inserted into the ventricle, the balloon is connected with a pneumatic host air channel, and the near end of the first catheter is connected with a blood cavity of a diaphragm pump. A medium cavity of the diaphragm pump is connected with a pneumatic host through a gas circuit, the diaphragm pump is driven by the pneumatic host to suck or pump blood and drive the balloon to expand or contract at the same time, and the filling and emptying periods of the balloon are kept synchronous with the blood pumping action of the diaphragm, so that the systolic and diastolic periods of the heart are accurately corresponding; the number of elements used by the ventricular auxiliary intervention system is reduced, and the technical problems that an existing ventricular auxiliary intervention system is large in size, and the burden of a patient is easily increased are solved.

A compliant stent implant is provided for deployment into a descending aorta to reduce the clinical impact of a hardened aorta. The compliant stent implant includes a tubular body extending between a proximal end and a distal end and including a proximal anchoring section terminating at the proximal end and a distal anchoring section terminating at the distal end. Each section is adapted to move from a restricted state to an expanded state. The treatment section is interposed between the proximal anchoring section and the distal anchoring section and is adapted to move from an undeployed state having a first volume to a deployed state having a second volume, where in the undeployed state, the treatment section has an undeployed diameter less than a restricted diameter of the distal anchoring section and the proximal anchoring section in the restricted state, and where in the deployed state, the treatment section has an undeployed diameter less than a restricted diameter of the distal anchoring section and the proximal anchoring section in the restricted state. And wherein the difference between the first volume and the second volume is sufficient to retain 20% to 70% of the volume of blood ejected during constriction.

The application relates to an aortic stent and a manufacturing method thereof. The manufacturing method of the aortic stent comprises the following steps: providing a proximal stent section for being implanted into a descending aorta, a distal stent section for being implanted into an ascending aorta, and an arch stent section for being implanted into an aortic arch; providing a foldable covering film; covering the covering film on the proximal stent section and the distal stent section; providing a keel line with a pre-bent shape; and penetrating the keel line through the proximal stent section, the arch stent section and the distal stent section; wherein the proximal stent section, the arch stent section and the distal stent section jointly define a supporting cavity, the covering film is foldable, and the keel line has the pre-bent shape. The whole stent can be bent along the bending direction of the keel line, so that the elastic straightening force of the aortic stent itself can be reduced, the flexibility of the aortic stent is improved, and the complications caused by poor adhesion are reduced.

The percutaneous intervention type axial flow blood pump comprises an impeller assembly, a flexible shaft transmission assembly and a handle assembly, the impeller assembly and the handle assembly are connected through the flexible shaft transmission assembly, and the flexible shaft transmission assembly comprises a flexible shaft, a transition sleeve and a protective sleeve. The transition sleeve is connected with a diversion tail cone of the impeller assembly, one end of the protective sleeve is fixed to the inner wall of the transition sleeve, the other end of the protective sleeve is connected with the handle assembly, the handle assembly is provided with an in-vitro micro motor in transmission connection with one end of the flexible shaft, and the other end of the flexible shaft is connected with an impeller rotor of the impeller assembly. The impeller assembly and part of the flexible shaft transmission assembly of the axial flow blood pump are percutaneously implanted into the body of a patient, the handle assembly is located outside the body, and the impeller assembly is kept fixed in the descending aorta through an elastic support of the impeller assembly. The axial flow blood pump adopts an in-vitro micro motor and flexible shaft transmission mode, and the problems that the temperature rise of an axial flow blood pump with a built-in motor is too high, abrasion particles are separated out, and fault inspection is not convenient are solved.

The present application provides a catheter simulator capable of improving catheter operation technology for brain diseases through a simple structure. The catheter simulator is characterized by having: a container (10); a cerebral vessel model (100) held in the container in a state of containing a liquid; and a holding unit provided to a side wall of the container and the cerebral vessel model and holding the cerebral vessel model in the container in a state of being filled with the liquid. The holding unit has: a first holding portion (21) that holds an end portion of an ascending aorta (101a) of the cerebral vessel model; and a second holding portion (22) that holds an end portion of a descending aorta (101b) of the cerebral vessel model, the first holding portion (21) has a liquid introduction port that introduces the liquid into the cerebral vessel model, the second holding portion (22) has a catheter introduction port that introduces a catheter into the cerebral vessel model, and an opening portion (121, 122) that controls balance of the liquid circulating in the cerebral vessel model is formed in a casing (100A) constituting the cerebral vessel model.

The present disclosure provides a solution for assisting cardiac circulation of a subject. In one aspect of the present disclosure, the new solution replaces the common practice of implementing a cannula of left ventricular assist device (LVAD) to the left ventricle (LV) through a large opening made in the apex of the LV, which has some disadvantages such as requirement of sternotomy, making a hole in an already very weak left ventricle, requirement of cardiopulmonary bypass, etc.The solution of the present disclosure suggests introducing the inflow cannula, namely the cannula / tube that suctions blood from the heart, through an opening made in the left atrium appendage (LAA) and guiding it through the left atrium (LA) and the mitral valve (MV) into the LV to be positioned therein. The inflow cannula is designed to allow suction of blood along various portions of its length that are intended to be positioned within the heart, namely along portions that are positioned in the LV, LA and optionally the LAA.The blood that is suctioned by the inflow cannula flows into a mechanical circulatory support device to be pumped therefrom, via an outflow cannula and into the aorta, thereby allowing supply of oxygenated blood to the entire body. Optionally, the outflow cannula can be coupled to the descending aorta and not to the ascending aorta as commonly done in the cases of LVAD implementations.A second aspect of the present disclosure provides a new solution for overcoming right ventricle failure by withdrawing blood from a first portion of the pulmonary artery and streaming blood to a second portion of the pulmonary artery, the second portion is downstream the first portion, namely more proximal to the lungs. The two solutions may be carried out by a similar surgical procedure, such as left thoracotomy. If the two solutions of the present disclosure are used together, they form a total artificial heart solution.

A first pipe section and a second pipe section are arranged, the second pipe section comprises an inner layer, an outer layer and a releasable elastic support located between the inner layer and the outer layer, and the upper end of the outer layer is separated from the inner layer to form a skirt edge, so that the far end of the second pipe section can be connected with a descending aorta firstly; according to the initial form of the far end of the second pipe section, the inner layer, the outer layer and the releasable elastic support between the inner layer and the outer layer are in a contracted state, after the far end of the second pipe section is placed in the descending aorta, the elastic support is released to open the descending aorta, the outer layer and the descending aorta are tightly attached under the supporting and pressing effects of the elastic support, and therefore the descending aorta is expanded. Therefore, suturing is not needed temporarily, blood perfusion circulation can be carried out only by clamping the upper end of the inner layer, and then the skirt edge is turned outwards and then is sutured and fixed with the descending aorta. Therefore, the double-layer elephant trunk stent artificial blood vessel which can be quickly matched with a descending aorta incision and is beneficial to shortening the circulation stopping time is provided.

This invention relates to a tool for measuring the rotation angle of an aortic endovascular stent graft, belonging to the field of medical device technology. It includes a first column, a second column, a base, a circular track, and a measuring column. A circular track is provided along the horizontal plane on the base, and a movable first column, perpendicular to the horizontal plane, is positioned on the circular track. A second column, perpendicular to the horizontal plane, is located at the center of a virtual circle containing the circular track. A measuring column is located on the upper surface of the first column, and the central axis of the measuring column intersects perpendicularly with the central axis of the second column. This invention can simulate real-world stent usage scenarios, simulating the connection between the ascending and descending aorta, and accurately measuring the angle of deviation of the marker after bending under stent graft bending conditions, directly obtaining the true bending deviation of the stent. The testing device has a simple structure, is convenient and quick to use, has high simulation accuracy, and provides stable and reliable test results.

A system for treating aortic dissection including an aortic dissection implant comprising an expandable anchoring structure and an elongate tubular structure. The expandable anchoring structure can be configured to apply radial force to the sinuses of the aortic root and / or the sinotubular junction when expanded. The elongate tubular structure can comprise an expandable support frame and one or more layers. The expandable support frame can be configured to extend from the descending aorta to the ascending aorta and curve along with a curvature of the aortic arch when expanded within the aorta. The one or more layers can comprise a first porous layer comprising an atraumatic outer surface positioned over the expandable support frame and a second non-porous layer positioned over a portion of the first porous layer. The second non-porous layer may be configured to be positioned on opposite sides of the aortic dissection and to be inflatable via blood flow to seal against the dissection.

The invention discloses a multi-balloon catheter which is suitable for being arranged in a descending aorta and close to a renal artery duct, the multi-balloon catheter comprises a catheter body and at least three fixed balloons which are communicated with the periphery of the catheter body and are arranged at intervals, and an inflation cavity communicated with at least one fixed balloon is formed in the catheter body; the three fixing balloons are arranged in the axial direction of the catheter body and all have an expansion state and a contraction state, and the diameter of the single fixing balloon in the expansion state ranges from 8 mm to 12 mm. According to the arrangement, the three fixed balloons are arranged on the catheter body at intervals, segmented contact can be formed for the descending artery catheter, therefore, the overall pressure of the catheter is effectively dispersed, and the risk that the balloons are abraded by plaques can be greatly reduced. The expansion diameter of the three fixed balloons is 8-12 mm, and compared with an existing conventional balloon, the expansion diameter of the three fixed balloons is obviously reduced and is only equivalent to 60%-80% of the expansion diameter of the existing balloon, friction between the balloons and plaques in the descending aortic canal can be effectively avoided, and the balloons are prevented from being clamped due to the fact that the balloon is narrow in the canal.

The application discloses a kind of new aortic dissection tear twist degree measuring method, belong to clinical medical technical field, B type aortic dissection refers to the intima of descending aorta is torn, blood flow is propagated along the longitudinal direction of aorta through intimal break, and forms true cavity and false lumen.False lumen refers to the newly formed lumen after intimal tear.At present, there is lack of quantitative false lumen twist degree analysis index in domestic and foreign researches.Firstly, the CT angiography axial position sequence of patient when being diagnosed is acquired, and a space orthogonal rectangular coordinate system is established after being introduced into measurement software, the false lumen position and dissection longitudinal tear length are determined, the three-dimensional coordinates of target points are sequentially measured from the axial position image from the tear starting point to the end point, the three-dimensional coordinates of all measurement points are exported, and the false lumen twist degree related indexes are sequentially calculated.The above-mentioned patent has the following beneficial effects: by using the above-mentioned measurement scheme, the purpose of measuring the false lumen twist degree of B type aortic dissection can be achieved, and evaluation indexes are provided for further exploring the false lumen twist rule.

The application provides a blood input function automatic extraction method and system based on whole-body PET images, and the method comprises the following steps: S1, acquiring a maximum intensity projection image of the upper body of a patient in a sagittal plane; S2, positioning a typical cardiovascular image layer based on the maximum intensity projection image of the upper body in the sagittal plane to obtain a plurality of typical cardiovascular layer images; S3, positioning a descending aorta based on K-means clustering for the plurality of typical cardiovascular layer images to obtain a descending aorta region selection result; and S4, extracting a blood input function based on the descending aorta region selection result. The application realizes automatic extraction of blood signals in the descending aorta, i.e. blood input functions, effectively improves the efficiency of parameter analysis and imaging, and helps to realize more efficient and accurate dynamic PET pharmacokinetic analysis.