14 results about "Renal artery" patented technology

The invention belongs to the technical field of medical image modeling, and particularly relates to a urinary system blood vessel modeling method based on 3D Gaussian splashing and a surgical robot navigation method.The blood vessel modeling method comprises the steps that a data source is preprocessed, and a urinary system blood vessel model is constructed; describing the center line and the section shape of the blood vessel based on a Bezier curve and an NURBS curve, and realizing dynamic 3DGS modeling of the blood vessel; dynamic 3DGS modeling, finite element analysis and computational fluid mechanics are combined, and hemodynamics simulation is achieved through a two-way mapping algorithm of Gaussian parameters and finite element grids. Compared with the prior art, the method solves the problem that in the prior art, due to the fact that a high-precision model for the dynamic characteristics of the blood vessels of the urinary system is lacked, accurate navigation and operation of urinary system interventional operation are difficult. According to the scheme, a high-precision model is constructed for urinary system blood vessels (such as renal arteries and bladder blood vessels) based on the three-dimensional Gaussian sputtering technology, and precise navigation and operation of urinary system interventional operations are effectively assisted.

The present application provides a balloon, a balloon catheter, an ablation catheter, and a tubular ultrasonic focusing apparatus and method, which relate to the field of medical devices. An expanded state of the balloon comprises a first extension section, a lens section, and a second extension section. The lens section is disposed between the first extension section and the second extension section in an axial direction. The lens section comprises a converging structure made of an energy-permeable material, wherein the converging structure is configured to converge energy from the lens section to a target converging region. The balloon catheter comprises a balloon, an energy generator, a first axial fixing member, and a second axial fixing member. The energy generator is disposed in a hollow channel of the lens section, and the energy generator has a length corresponding to the lens section in an axial direction. When the balloon catheter provided in embodiments of the present application is applied to an ablation surgery, accurate focusing on a target ablation region can be achieved based on the lens section, and damage to surrounding tissues can be minimized while precisely targeting nerves in the target ablation region, thereby improving the effect of the ablation surgery. In addition, by means of a focusing / weak focusing region formed by an acoustic beam adjustment structure, the ablation depth and precision can be adjusted, and synchronous temperature rise in the target region is achieved. The balloon catheter has the advantages of uniform and consistent ablation effect and obvious distal boundary, and can achieve the precise ablation of renal artery branches and trunks, which ensures the thoroughness of ablation, reduces damage to surrounding normal tissues to the greatest extent, meets the clinical requirements of "ablation to completion", and improves the effectiveness and safety of treatment.

The utility model provides a catheter used for expanding a severe stenosis renal artery opening, the catheter is an elastic catheter, two ends of the catheter are respectively an input port and an output port, the catheter comprises a straight section, a bending section and an attacking section which sequentially extend between the input port and the output port, and the straight section is provided with an opening. The end, away from the input port, of the straight section extends towards one side in the radial direction to form the bent section and the straight section, and the included angle between the axis of the attack section and the axis of the straight section is not larger than 90 degrees. According to the catheter for expanding the severe stenosis renal artery opening, based on the anatomical structure relation between the renal artery and the aorta abdominalis, the attack section located at the head end of the catheter and the telecentric end of the aorta abdominalis form a right angle or an acute angle, and the appearance and the elasticity modulus of the attack section are limited, so that tension and stress of the bent section can be smoothly transferred; and therefore, the needle can easily and smoothly pass through the narrow section of artery during rolling and impact.

The invention provides a renal artery magnetic resonance imaging method. The method comprises the following steps: setting scanning parameters of a magnetic resonance imaging system; setting a magnetic resonance imaging system starting part Fourier technology; scanning in a breath-holding state of the user to generate scanning data; and reconstructing an image according to the scanning data. According to the renal artery magnetic resonance imaging method provided by the invention, the scanning time and the hardware cost are reduced, and meanwhile, the imaging success rate is improved. The invention further provides a magnetic resonance imaging system related to the renal artery magnetic resonance imaging method.

Devices, systems, and methods for patient-specific, custom-designed fenestrated implants. Various examples involve abdominal aortic stent-grafts with custom-designed fenestration features for perfusion of the renal arteries, mesenteric arteries, and / or celiac trunk arteries.

Apparatus and methods for deactivating renal nerves extending along a renal artery of a mammalian subject to treat hypertension and related conditions. An ultrasonic transducer (30) is inserted into the renal artery (10) as, for example, by advancing the distal end of a catheter (18) bearing the transducer into the renal artery. The ultrasonic transducer emits unfocused ultrasound so as to heat tissues throughout a relatively large impact volume (11) as, for example, at least about 0.5 cm3 encompassing the renal artery to a temperature sufficient to inactivate nerve conduction but insufficient to cause rapid ablation or necrosis of the tissues. The treatment can be performed without locating or focusing on individual renal nerves.

An intravascular catheter for peri-vascular nerve activity sensing or measurement includes multiple needles advanced through supported guide tubes (needle guiding elements) which expand with open ends around a central axis to contact the interior surface of the wall of the renal artery or other vessel of a human body allowing the needles to be advanced though the vessel wall into the perivascular space. The system also may include means to limit and / or adjust the depth of penetration of the needles. The catheter also includes structures which provide radial and lateral support to the guide tubes so that the guide tubes open uniformly and maintain their position against the interior surface of the vessel wall as the sharpened needles are advanced to penetrate into the vessel wall. The addition of an injection lumen at the proximal end of the catheter and openings in the needles adds the functionality of ablative fluid injection into the perivascular space for an integrated nerve sending and ablation capability.

An endovascular treatment system including branch features for perfusing branch vessels such as the renal arteries, celiac arteries, and mesenteric arteries (e.g., for treating aortic aneurysms).

The present invention relates to the technical field of medical instruments and regulation methods therefor. Disclosed are a laser ablation catheter, a laser ablation system, and a regulation method for the laser ablation system. The laser ablation catheter comprises a tubular structure and an optical fiber bundle. The tubular structure is provided with an optical fiber channel. The optical fiber bundle is accommodated in the optical fiber channel. The optical fiber bundle is provided with an output end, and the output end is located at the far end of the tubular structure. The laser ablation system comprises the described laser ablation catheter. The present invention further provides a regulation method for a renal artery laser ablation system for regulating the described laser ablation system. The laser ablation catheter, the laser ablation system, and the regulation method for the laser ablation system provided by the present invention have good application effects.

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 renal artery stent imbedding catheter comprises an outer catheter and an inner catheter, the inner catheter is nested in the outer catheter, the outer catheter comprises an outer catheter body and an outer catheter bending part which are integrally formed, the inner catheter comprises an inner catheter body and an inner catheter bending part which are integrally formed, and an opening of the outer catheter bending part and an opening of the inner catheter bending part have the same angle. The inner catheter is nested in the outer catheter, the outer catheter and the inner catheter are both provided with the bent portions, the angle can adapt to the angulation relation between renal arteries and aorta abdominalis of most patients, and after the inner catheter is matched with a guide wire to be selected into a target blood vessel position, the outer catheter can be used as a support. After the outer catheter reaches the target position, the inner catheter is withdrawn, and a channel of the outer catheter is used as a sacculus and stent conveying channel, so that damage to the abdominal aorta ratio and the renal artery in the sacculus and stent conveying process can be reduced, the occurrence rate of potential complications is reduced, and the technical success rate is increased.

The invention discloses an organ transfer pipe capable of automatically separating bubbles, which comprises a bottom support, a through hole is formed in the bottom support, and a flexible gasket is arranged at the through hole; the flip cover is arranged on the bottom support, one side of the flip cover is rotatably connected with one side of the bottom support, the flip cover is provided with a water-blocking breathable film mounting port, a water-blocking breathable film is arranged at the water-blocking breathable film mounting port, the flip cover is provided with a connecting pipe leading to the interior of the flip cover, a clamping end face is arranged at the bottom of the inner side of the flip cover, and after the flip cover and the bottom support are closed, the water-blocking breathable film is arranged in the clamping end face. The clamping end face and the flexible gasket clamp the renal artery wall for perfusion. According to the invention, the residual gas in the initial perfusion state of the circulating tail end of organ perfusion can be automatically and fully discharged, so that the perfusion efficiency and the organ repair quality can be effectively improved. Manual intervention for bubble removal is not needed in the repair and perfusion process of the whole organ, and the probability that the organ is polluted is also effectively reduced.

A planning method for defining a placement position of a stent in an abdominal aorta of a subject is described. An abdominal aortic aneurysm portion of the abdominal aorta has an aneurysm sac and an aneurysm neck, a distal end of the aneurysm neck, a lower renal aortic ostium, a first distance between a distal end of the lower renal aortic ostium and the distal end of the aneurysm neck, and a second distance between a proximal end of the lower renal aortic ostium and the distal end of the aneurysm neck are identified in image data. The first distance is compared with a minimum stent length. A stent placement position is defined based on a selected stent length such that a distal end of the stent is aligned with the distal end of the aneurysm neck.

An endovascular treatment system (e.g., for treating aortic aneurysms) includes branching features for perfusing branching vessels such as renal, abdominal and intestinal arteries.