7 results about "Renal artery" patented technology

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.

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 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 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.

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.