10 results about "Inferior vena caval" patented technology

The present application relates to the technical field of image analysis, and in particular to a kind of inferior vena cava filter implantation puncture target point auxiliary path planning method.Multiple CT images of the inferior vena cava of the patient are obtained, and the region to be distinguished is preliminarily divided based on the shape change of the blood vessel.Then, combined with the shape features and area change of the region to be distinguished, the blood vessel overlap representation evaluation index is determined, and the overlap and non-overlap regions are distinguished.Next, the overlap and non-overlap regions are combined, the shape similarity and overlap representation evaluation index similarity are analyzed, the smooth continuation index is determined, and the matching combination is screened out based on the index and the proportion of blood vessel overlap area.In addition, the gray value difference of blood vessels at different levels in the CT image is also considered, and the non-blood vessel overlap region is evaluated at different levels to more accurately represent the region belonging to the same blood vessel.Finally, according to the hierarchical evaluation result, the navigation path planning of the puncture target point in the region with blood vessel overlap is more accurate, and the planning accuracy is improved.

The invention provides a tricuspid valve clip operation simulator which comprises a bottom plate, and a first side of the bottom plate is provided with a first storage groove and a second storage groove; the first module is provided with a tricuspid valve simulation part, and the first module is arranged on the bottom plate in a mode that the first module can be switched between an unfolded state and a folded state; the second module is provided with a lower cavity tube used for simulating the inferior vena cava, and the second module is arranged on the bottom plate in the mode that the second module can be switched between the unfolded state and the folded state; when the first module is in an unfolded state, the tricuspid valve simulation part protrudes out of the bottom plate, and the tricuspid valve simulation part and the bottom plate form an analogue simulation position; when the second module is in an unfolded state, the lower cavity tube protrudes out of the bottom plate to form a surgical instrument access path; when the first module is in the folded state, the first module is integrally contained in the first containing groove, and when the second module is in the folded state, the second module is integrally contained in the second containing groove.

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 present application relates to the technical field of data processing, in particular to a pediatric transcarotid arterial and venous ECMO cannulation depth prediction method and system, comprising: selecting a data object; incision position positioning; according to the corresponding incision position, measuring the depth of the common carotid artery to the innominate artery into the aortic arch at the corresponding incision position as the ECMO arterial cannulation depth; according to the corresponding incision position, measuring the depth of the internal jugular vein to the inferior vena cava into the right atrium at the corresponding incision position as the ECMO venous cannulation depth; establishing a prediction formula; outputting the prediction result for reference; the present application summarizes the existing pediatric transcarotid arterial and venous ECMO cannulation experience, calculates and verifies the prediction formula of the transcarotid arterial and venous ECMO cannulation depth, so as to provide a reference to help doctors more accurately estimate the cannulation depth before cannulation, reduce complications caused by improper cannulation position; the prediction formula can be used as part of the standardized operation, improve the success rate and safety of ECMO cannulation.

The disclosure notably relates to an apparatus for minimally invasive medical use, comprising an elongated part including a catheter and / or a catheter sheath, the elongated part having a distal portion and an intermediate portion, the elongated part being configured for being introduced inside the inferior vena cava of a human patient and positioned at an operating location where the distal portion is in and / or beyond the right atrium and the intermediate portion is in the inferior vena cava, and one or more monitoring electrodes arranged on the intermediate portion of the elongated part, the one or more monitoring electrodes being configured for monitoring an electrical activity of the diaphragm of the human patient when the elongated part is positioned at the operating location. This forms an improved solution for monitoring an electrical activity of the diaphragm of a human patient.

This invention discloses a filter-combined inferior vena cava stent, relating to the field of medical device technology. The stent includes a restraint end and an adjustment end connected to its two ends. A rotating structure for unblocking thrombi is connected between the restraint end and the adjustment end. The adjustment end also includes an adjustment structure for adjusting the mesh size of the adjustment end. This invention can aggregate and unblock thrombi, improving thrombolysis capacity, and can also personalize the mesh size of the filter according to the different blood vessel sizes of different patients.

The invention belongs to the technical field of medical instruments, and provides a soluble inferior vena cava filter. The soluble inferior vena cava filter comprises a filtering part and a restraint ring, the filtering part comprises an expansion part and contraction parts, the expansion part is located in the middle of the soluble inferior vena cava filter, and the contraction parts are located at the two ends of the soluble inferior vena cava filter; the filtering part is composed of degradable material wires, and the two ends of the filtering part are restrained in the restraining rings to form the contraction part. The soluble inferior vena cava filter can be completely degraded in vivo and does not need to be taken out through a secondary operation; the expansion part provides enough supporting force and stability, and the contraction part plays a role in filtering thrombus; the staged degradation design is adopted, the restraint ring is degraded firstly, the contraction part is expanded, then the expansion part is gradually degraded, the inferior vena cava cannot be blocked, and the risks of stress fracture and collapse or displacement of the supporting part are reduced; and a proper degradable material is selected, so that the filter has supporting force, stability and thrombus filtering effect.

The invention discloses a 3D printing simulator capable of being used for atrial septum puncture operation, and relates to the technical field of medical instruments.The 3D printing simulator comprises a pleuroperitoneal cavity simulator, a transesophageal ultrasound simulation approach is arranged above the pleuroperitoneal cavity simulator in a penetrating mode, and an inferior vena cava simulation approach is arranged below the pleuroperitoneal cavity simulator in a penetrating mode; the pleuroperitoneal cavity simulator is a relatively closed environment, human body internal environment simulation liquid is contained in the pleuroperitoneal cavity simulator, and internal physiological parameters of the pleuroperitoneal cavity simulator simulate the human body internal environment. According to the 3D printing simulator capable of being used for the atrial septum puncture operation, due to the design of a detachable individualized 3D printing atrial septum model, the simulator can be customized according to the specific conditions of different patients, the atrial septum forms and structures of the different patients possibly have differences, and the atrial septum model conforming to the specific patient characteristics is manufactured through the 3D printing technology; an operator can carry out more targeted simulation training aiming at actual cases, and the success rate and safety of an operation are improved.

The application provides a ventricular assist device, a control unit thereof and a medical device. The ventricular assist device comprises a first pumping device arranged at a proximal end of a flow conduit tube and a second pumping device arranged at a distal end of the flow conduit tube. The control unit first starts the first pumping device arranged in the superior vena cava or the inferior vena cava of a target user to perform pumping, so that a fluid inlet is arranged in the superior vena cava or the inferior vena cava, suction is reduced, and damage to ventricular tissue or destruction to a valve is avoided. When the current operation state of the first pumping device does not meet the demand of the target user, i.e., the target pressure is greater than a first threshold value, the second pumping device is started to increase the fluid pressure in the flow conduit tube, accelerate the pumping of blood from the fluid inlet to a fluid outlet, and thus improve the pumping efficiency of the ventricular assist device.

The invention discloses an input signal design method, system and equipment of an inferior vena cava blocking system. The input signal design method of the inferior vena cava blocking system comprises the following steps: obtaining an input variable and an output variable of the inferior vena cava blocking system; according to the input variable and the output variable, identifying to obtain a low-order control model of the inferior vena cava blocking system; and according to the low-order control model, predicting an output moving trajectory of the inferior vena cava blocking system under a given control signal, and according to the difference between the output moving trajectory and an expected output reference trajectory of the inferior vena cava blocking system, solving to obtain an optimal control input signal of the inferior vena cava blocking system. According to the embodiment of the invention, blood vessel flow blocking can be effectively realized, and meanwhile, the overshoot phenomenon of the pressure on the rear side of the balloon can be effectively inhibited.