32results about How to "Guaranteed blood supply" patented technology

The invention discloses a covered stent for an aortic dissection surgery, a delivery device and a use method thereof. The stent comprises a main body, wherein the main body decreases progressively from the heart near end with a large diameter to a far end with a small diameter, and the superior border of the middle piece of the main body is a rotary island; a tectorial membrane is arranged except the rotary island, and the two ends of the main body and the rotary island are provided with positioning marks. The delivery device comprises a delivery sheathing canal, a suture and a traction guide wire, wherein the suture is sewn on the outer side surface of the covered stent, and the two side edges of the covered stent at the near end of the left subclavian artery are sewn up by the suture; the stent is closed up to be in a semi-contraction state by the traction guide wire through the suture, and the covered stent is closed up and wrapped in the delivery sheathing canal; the delivery sheathing canal is provided with a steeple, and the far end of the traction guide wire penetrates through the handle of the delivery sheathing canal and is fixed. The covered stent for the aortic dissection surgery is used for a dissecting aneurysm surgery of the lesser curvature side of aortic arch and an interventional minimally invasive surgery of an aortic dissection near the brachiocephalic trunk, so that the trauma of a thoracotomy is avoided, and the athe lumen crevasse occlusion is directly implemented.

The invention relates to the technical field of medical instruments, in particular to a stent graft used for treating peripheral arterial diseases and provided with a branch stent. The stent graft comprises a main stent and the branch stent, the main stent and the branch stent are each provided with a near end, a far end and an inner cavity arranged between the near end and the far end, an opening is formed in the main stent, the main stent and the branch stent are connected through a connector, the connector is provided with a bottom connected with the opening, a top capable of movably entering and exiting the opening and a connection inner cavity arranged between the bottom and the top, and the near end of the branch stent is connected with the top of the connector. The stent graft has the advantages that the stent graft is used for treating vascular diseases, is wide in adaptability, does not need to be customized, can be used for recovering multiple branch arteries when the peripheral arterial diseases are treated, prevents vascular stents from being implanted twice or many times and simplifies operation difficulty.

The invention discloses an aorta covered stent with a chimney stent supporting pipe. The aorta covered stent comprises a main stent, at least one supporting pipe for releasing a chimney stent is arranged in the main stent, arranged close to the front end of the main stent and tightly and fixedly connected with the inner wall of the main stent, and the wall of the main stent is provided with a through hole communicated with the supporting pipe. By means of the aorta covered stent of the structure, the at least one supporting pipe is reserved in the aorta covered stent, after the aorta covered stent is released and attached to the wall, the chimney stent is then released by the reserved supporting pipe into important branch blood vessels, and blood flow supplying to the important branch blood vessels is accordingly guaranteed. Due to the fact that the chimney stent is released to the inner side of the aorta covered stent, wall attaching of the aorta covered stent cannot be influenced, and inner leakage can be accordingly and effectively avoided; in addition, the aorta covered stent cannot press the chimney stent, and decreasing of cross sections of blood flow channels or blocking of the blood flow channels formed by the chimney stent can be effectively avoided.

The invention belongs to the technical field of medical equipment, and particularly relates to a multi-cavity covered stent and an application method thereof. The multi-cavity covered stent comprises a main covered stent and a group of small-diameter covered stents, wherein a cavity at the front end of the main covered stent is divided to form a multi-cavity structure; the multi-cavity structure comprises five circumference sub-cavities and a middle sub-cavity; the near ends of the group of small-diameter covered stents are respectively sleeved to the interiors of the circumference sub-cavities and the middle sub-cavity. The covered stent can be applied to the endovascular interventional treatment of thoracoabdominal aortic aneurysm, is beneficial to the reduction of operating difficulty, reduces operation wound, shortens the operation time, and improves the fitness degree and the flexibility between the covered stent and branch vessels.

The invention discloses a covered stent for aortic dissection surgery, a conveying device and a use method. The stent comprises a body which is a covered stent body. The stent is a conical stent with the diameter gradually reduced from the cardiac proximal portion to the thoracic aorta distal portion. An exposed portion is arranged on the lower portion of the body of the stent and is not covered. Three balloon dilatation stents are connected to the upper edge of the middle of the body. A protective gasket made from polytetrafluoroethylene is arranged at the near end of the body. The three balloon dilatation stents are provided with three catheters respectively. Each catheter is about 2 m long. The conveying device comprises a conveying sheath, the body of the stent is compressed in the conveying sheath, and the three balloon dilatation stents on the middle section of the body are compressed in the conveying sheath. A conveying sheath system is provided with an apex, and notches are formed in the tip end of the conveying sheath system for the body of the stent and guide wires and the catheters of the three balloon dilatation stents. The invention provides the covered stent for aortic dissection surgery. The stent is used for minimally invasive surgery treatment of Stanford A type aortic dissection with a wound among three branch vessels on the arcus aortae, avoids injuries caused by thoracotomy, and can be directly used for intra-cardiac wound occlusion.

The invention relates to a positioning device for in-situ windowing of an endovascular stent-graft. The positioning device comprises a push piece, a conveying sheath and a guiding wire, wherein a first through hole is formed in the push piece, a first magnetic piece is arranged at the first end of the push piece, and a guiding wire hole communicated with the first through hole is formed in the first magnetic piece; a second through hole is formed in the conveying sheath, a second magnetic piece is arranged at the first end of the conveying sheath, a third through hole communicated with the second through hole is formed in the second magnetic piece, and the first magnetic piece is connected with the second magnetic piece in a magnetic attracting manner; and the guiding wire is used for conveying the first magnetic piece and the second magnetic piece. The positioning device provided by the invention has the benefits as follows: after folding of the magnetic pieces, windowing is achieved through guided laser burning punching or a puncture needle method, the step of windowing is simplified, operating difficulty and risks are lowered, the operation time is saved, equipment customization is avoided, and moreover, the operation cost is lowered.

The invention discloses a covered stent. The covered stent comprises a first covered section, a second covered section and a connecting section for connecting the first covered section and the secondcovered section, the connecting section comprises a deformation part, the axial size of the deformation part can be lengthened or shortened, and the connecting section further comprises an opening forcommunicating the inner surface and the outer surface of the covered stent. After the covered stent is implanted into a diseased blood vessel, the covered stent can isolate aneurysm, even aneurysm extending across branches, blood supply of branch blood vessels can be guaranteed, and meanwhile the covered stent can adapt to bent diseased blood vessels.

The invention provides a suction catheter. The suction catheter comprises a suction component and a balloon component, wherein the suction component is provided with a suction cavity; the balloon component is arranged on the suction component in a sleeving mode; a balloon cavity is defined by the inner wall of the balloon component and the outer wall of the suction component jointly; at least onecirculation groove extending in the extending direction of the suction component is formed in the outer wall of the balloon component; the balloon component has a contraction state when no fluid is introduced into the balloon cavity and an expansion state after the fluid is introduced into the balloon cavity through an injection port; the groove walls of the circulation grooves are distributed inthe circumferential direction of the outer wall of the balloon component at intervals; and the circulation grooves keep through from the far end to the near end when the balloon component is in the expansion state. According to the suction catheter, the circulation grooves are formed in the outer wall of the balloon component, so that when the balloon component is in the expansion state and the outer wall of the balloon component is attached to the wall of blood vessel, blood can continuously flow through the circulation grooves which are through from far to near, blood vessel blockage is prevented, normal blood supply of myocardium is guaranteed, and surgical risks are reduced.

The invention provides a fixed head pillow structure. The fixed head pillow structure comprises a main air sac and an air pressure regulation component, wherein a first air sac, a second air sac, a third air sac and a fourth air sac are arranged in the main air sac; a first supporting region is formed by the first air sac and the second air sac, a second supporting region is formed by the third air sac and the fourth air sac, a third supporting region is formed by the first air sac and the third air sac, and a fourth supporting region is formed by the second air sac and the fourth air sac; andthe air pressure regulation component is used for regulating the air pressure in the first air sac, the second air sac, the third air sac and the fourth air sac to regulate the relative height of thefirst supporting region and the second supporting region as well as the relative height of the third supporting region and the fourth supporting region, so that a patient is at a horizontal position,and when the head is pillowed on the main air sac, the pitch angle and the bilateral deflection angle of the head of the patient are regulated; and therefore, according to the relationship between the healthy side and the diseased side of the patient, the head of the patient is regulated to an appropriate angle, so that the situation that the skin flap is dragged is avoided, and the blood supplyof the patient is guaranteed to be normal.

The invention discloses an intra-cavity circulation tube for maintaining artery blood supply of abdominal cavity internal organs. The intra-cavity circulation tube comprises a main catheter and multiple branched tubes, the two ends of the main catheter are open, main catheter balloons are arranged at the positions, close to the two ends, of the main catheter respectively and separately connected with a main balloon filling tube, multiple main tube connectors are formed in the side wall of the main catheter, and the branched tubes are connected with the main catheter through the main tube connectors; the two ends of the branched tubes are open, a branched tube balloon is arranged at the end, deviating from the main catheter, of each branched tube, and a branched tube balloon filling tube isinstalled on each branched tube balloon. The intra-cavity circulation tube can solve the problems that in the prior art, an intra-cavity circulation tube is complex in operation and inconvenient to use, is easy and convenient to operate, wide in application range and high in reliability.

The invention relates to a chain type hepatic blood vessel blocker. The chain type hepatic blood vessel blocker comprises a connecting piece I, a connecting piece II, a fixing plate I and a fixing plate II, wherein a plurality of joints are movably connected to form the fixing plate I, a plurality of joints are movably connected to form the fixing plate II, the fixing plate I and the fixing plate II can rotate in the same plane and are arranged in parallel in the perpendicular direction, the connecting piece I is arranged in the middle of the fixing plate I and in the middle of the fixing plate II in a sleeved mode, the fixing plate I is connected with the fixing plate II through the connecting piece I, one end of the connecting piece II is arranged at the tail end of the fixing plate I, the other end of the connecting piece II is arranged at the tail end of the fixing plate II, and the tail end of the fixing plate I is connected with the tail end of the fixing plate II through the connecting piece II. The chain type hepatic blood vessel blocker is simple in structure, the two fixing plates can be directly used for clamping the liver in the regular or irregular liver resection operation, force is evenly exerted on the surface of the liver, and the chain type hepatic blood vessel blocker is convenient to operate in the operation process. The two fixing plates can be placed to form various geometric figures, the blood vessels of the portal system and the blood vessels of the hepatic vein system can be blocked at the same time, and therefore normal blood circulation of the hepatic tissue can be ensured.

The invention discloses a capsule pill capable of enhancing memory, which belongs to the technical field of Chinese herba preparation. The capsule pill capable of enhancing memory is prepared from granulesten, rhizoma acori graminei, fushen, astragalus mongholicus, codonopsis pilosula, dried longan pulp and English walnut seed. The medicines contain nutrient substances which are most required by the brain. The capsule pill can relieve stuffy nose and nerves, soothe the nerves and restore consciousness. Patients are in high spirits because of full Qi-blood. The memory ability is enhanced, and the quality of working, studying and living is improved.

The invention provides an aortic arch covered stent and a conveying device thereof, and relates to the field of medical instruments, the aortic arch covered stent comprises a skeleton, a main covering film, an abutted seam covering film, a first fixing ring, a second fixing ring and a third fixing ring; the main covering film is connected to the skeleton to form a covered stent body, a first opening is formed in the near end of the main covering film, the first fixing ring is fixed to the edge of the first opening, and developing marks are arranged around the first fixing ring; a window is formed in the far-end part of the first opening in the main covering film, the abutted seam covering film comprises a window covering film, the window covering film covers the window and is connected to the main covering film in a sewing mode, a second opening and a third opening are formed in the window covering film, a second fixing ring is fixed to the edge of the second opening, and a third fixing ring is fixed to the edge of the third opening; and the second fixing ring and the third fixing ring are connected with developing rings. The problems that a pre-windowing covered stent is difficult to match with branch blood vessels of a human body, blood vessel cutoff is easily caused, blood does not flow through blood vessel branches before windowing of an operation windowing covered stent, membrane rupture causes covered tissue damage, and the covering strength is affected are solved.

The invention belongs to the field of medical equipment and relates to a medical catheter structure for bridging in vitro and application of the medical catheter structure. The medical catheter structure for bridging in vitro mainly comprises a soft thick cannula, a blood flow control device, two connecting ports, a blood flow detection meter and a pipeline. By means of in-vitro bridging, the problem about restoration of blood circulation for tissue with distal acute ischemia is solved, blood flow volume in a bridging catheter can be monitored and controlled, the most appropriate blood flow volume of the distal tissue of an embolized blood vessel is maintained, and the purposes of preventing necrosis of locally ischemic tissue and controllably releasing systemic inflammation factors and necrotic tissue are achieved. Meanwhile, with step-by-step compensation of collateral vessels around the embolized blood vessel, the blood flow volume in the bridging catheter can be adjusted to be lower step by step until the bridging catheter is removed. With application of the medical catheter structure for treatment, endovascular thrombectomy is not needed, the using method is simple, and the medical catheter structure can be widely applied to the medical field.

The invention provides a locking hole of an inner fixing frame, which is characterized in that the hole is a tapered thread through hole and is uniformly distributed on the inner fixing frame which has a distance of 0.3-0.5 mm from a bone.

The invention provides a locking pressurizing hole of an internal fixed frame. The locking pressurizing hole is characterized in that the locking pressurizing hole is formed by partially overlapping locking holes and pressurizing holes; the locking holes are conical screw thread through holes; the pressurizing holes are unthreaded through holes with arched pressurizing slopes; and the locking pressurizing holes are uniformly distributed in the internal fixed frame, wherein the gap between the internal fixed frame and the skeleton ranges from 0.3mm to 0.5mm.

The invention discloses a quick pressurizing belt, which includes a rectangular strapping strap, wherein an inflatable air bag is further arranged inside the strapping strap, and an inflatable tube is arranged on one side of the strapping strap, and the inflatable air bag, the strapping strap, and the inflatable tube are installed during manufacture. One piece. The two ends of the binding strap are provided with a binding rope, the inflation tube is provided with a pressure regulating button, the pressure regulating button and the inflation pipe are screwed together, and the binding rope and the binding strap are integrally formed during manufacture. The strapping has elasticity, and the inflatable airbag is inflated into multiple layers, and the inflation is 1.5 atmospheres. The invention has the advantages of simple structure, convenient use, easy pressurization, fast blood supply, and greatly reduced labor intensity of medical personnel.