6 results about "Inferior vena caval" patented technology

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 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 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.