5 results about "Drainage catheter" patented technology

Ventricular catheters and their methods of use are disclosed. In some embodiments, the disclosed ventricular catheters may reduce, or substantially prevent, obstruction of the catheter by astrocytes or other brain tissue due to adhesion and / or growth within the catheter. For example, in some embodiments, the holes and internal lumen of a ventricular catheter may be constructed such that the wall shear stresses applied within the holes and internal lumen of the catheter are greater than a threshold shear stress to prevent cell adhesion and growth within the catheter.

A method for treating a tumor excise site defined by a center and edges is described. The method includes simultaneously exposing the tumor site to radiation containing fluid and pulsating thermally treated fluid, wherein the fluids are separate from each other and confined to a balloon. Also disclosed is a device for treating a tumor excise site defined by a center and edges. The device includes a reversibly deformable container positioned at the center, the container encapsulating thermally treated fluid; a first drainage conduit; and a second radio-isotope containing conduit contacting a second longitudinally extending surface of the first drainage conduit so as to be positioned between the first drainage conduit and the center.

The invention belongs to the technical field of medical instruments, and discloses a drug controlled release drainage device for intracranial hematoma, which comprises a drainage catheter, a catheter end, an auxiliary tube and a connecting cylinder, a drug storage tube is arranged in the catheter end, a plurality of groups of prefabricated micropores are formed in a sealing head of the drug storage tube, a drug delivery piston is arranged in the drug storage tube, and the drug storage tube is connected with one end of the auxiliary tube; a driven piston and a driving piston are arranged in the auxiliary pipe, a pipeline between the driven piston and the driving piston is filled with liquid, an adjusting valve is arranged, and a piston push rod on the driven piston is in contact with the dosing piston; a push plate and a lead screw are arranged in the connecting cylinder in a penetrating mode, a fixing rod on one side of the push plate makes contact with the driving piston, the push plate is connected with a compression spring, and the compression spring is connected with a moving block on the lead screw. The screw rod is rotated, the movable block extrudes the compression spring, pressure is stored, and during drug administration, drug administration can be stopped by opening the adjusting valve, pushing the driving piston through the push plate, synchronously moving all the pistons through liquid transmission, discharging the drug in the drug storage pipe and closing the adjusting valve.

The utility model discloses a directional lavage drainage catheter, which comprises a catheter body, a catheter head end and a catheter core, a liquid filling cavity is arranged in the catheter body, the liquid filling cavity extends along the axial direction of the catheter body and penetrates through the catheter body, and the catheter head end is connected to the end part of the catheter body and is used for blocking the liquid filling cavity. A liquid filling cavity is formed in the catheter body, a plurality of filling holes are formed in the outer surface of the catheter body, the filling holes are distributed in the circumferential direction and the axial direction of the catheter body at intervals, the filling holes communicate with the liquid filling cavity, an inwards-sunken opening is formed in the outer surface of the catheter core, and the catheter core is inserted into the liquid filling cavity and can move in the liquid filling cavity; the outer surface of the pipe core is used for covering part of the filling holes, and the opening is used for being communicated with the other filling holes. Irrigation and flushing in all directions in the cranium are achieved, and the hematoma removing capacity is improved. Meanwhile, the tube core is located in the liquid filling cavity, the direction can be adjusted according to user requirements, and the lavage pressure is concentrated in the opening direction for efficient lavage.