36 results about "Atriocaval shunt" patented technology

A device for regulating blood pressure between a patient's left atrium and right atrium comprises an hourglass-shaped stent comprising a neck region and first and second flared end regions, the neck region disposed between the first and second end regions and configured to engage the fossa ovalis of the patient's atrial septum, and a drug-eluting biodegradable material that biodegrades over time to release a drug that limits tissue overgrowth. The inventive device also may include a biodegradable material that biodegrades to offset flow changes caused by tissue overgrowth. The inventive device may reduce left atrial pressure and left ventricular end diastolic pressure, and may increase cardiac output, increase ejection fraction, relieve pulmonary congestion, and lower pulmonary artery pressure, among other benefits.

Devices are provided with an internal dimension that can be reduced and increased in vivo. In one example, an interatrial shunt for placement at an atrial septum of a patient's heart includes a body. The body includes first and second regions coupled in fluid communication by a neck region. The body includes a shape-memory material. The body defines a passageway through the neck region for blood to flow between a first atrium and a second atrium. The first and second regions are superelastic at body temperature, and the neck region is malleable at body temperature. A flow area of the passageway through the neck region may be adjusted in vivo.

The present disclosure discloses an atrial shunt implant device. The atrial shunt implantation device includes a stent, and the stent has a first end, a middle channel part and a second end arranged in sequence along a first direction, and the middle channel part is connected to the first end and the second end respectively. The second end is connected; the intermediate channel portion has a contracted state and an expanded state in the second direction; in the contracted state, the intermediate channel portion has a first inner diameter at the middle position in the first direction; in the expanded state, The middle channel portion has a second inner diameter at the middle position in the first direction; the second inner diameter is larger than the first inner diameter; the smallest inner diameters of the first end portion and the second end portion are larger than the first inner diameter The first inner diameter is smaller than the second inner diameter.

The invention discloses a high-stability type atrial shunting device with a self-adaptive adjustment function. A left atrial disc surface and a right atrial disc surface are integrally connected through a connecting column. The left atrial disc surface and the right atrial disc surface are provided with a left atrial shunting port and a right atrial shunting port in the upper and lower ends of theconnecting column respectively, and the connecting column is internally provided with a through hole. The inner walls of the left atrial shunting port and right atrial shunting port are provided withopening restraining filaments. The high-stability type atrial shunting device with the self-adaptive adjustment function can offset the reduction of the size of a shunting hole caused by endothelialization of cells at the shunting hole and achieve pressure balance of the left and right atriums. The invention also discloses a tightness adjustment driving device used for intervention of the high-stability type atrial shunting device with the self-adaptive adjustment function. The end, close to a limiting cylinder, of a rotating groove is provided with a rotating cavity, and the structural sizeof the inner wall of the rotating cavity is the same as that of the outer wall of a rotating head. The atrial shunting device is simple in structure and convenient to operate and use and can adaptively adjust the length of the opening restraining filaments so as to achieve adjustment of the size of the shunting hole.