36 results about "Atriocaval shunt" patented technology

Described embodiments include apparatus (28) that includes a shunt (26). The shunt includes a flared distal portion (40), a flared proximal portion (44), and an intermediate portion (42), disposed between the distal portion and the proximal portion. The apparatus further includes a constricting flexible longitudinal element (38) passing circumferentially along the intermediate portion of the shunt, configured to constrict the intermediate portion of the shunt, and one or more proximal-portion-collapsing flexible longitudinal elements (36) configured to collapse the proximal portion of the shunt. Other embodiments are also described.

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.

Described embodiments include apparatus (28) that includes a shunt (26). The shunt includes a flared distal portion (40), a flared proximal portion (44), and an intermediate portion (42), disposed between the distal portion and the proximal portion. The apparatus further includes a constricting flexible longitudinal element (38) passing circumferentially along the intermediate portion of the shunt, configured to constrict the intermediate portion of the shunt, and one or more proximal-portion-collapsing flexible longitudinal elements (36) configured to collapse the proximal portion of the shunt. Other embodiments are also described.

The invention belongs to the technical field of medical instruments, and particularly relates to a delivery system for an atrial shunt. The delivery system comprises a first sheath structure, a second sheath structure and an inner core tube structure, the second sheath structure is connected with the first sheath structure and the inner core tube structure, the first sheath structure is used for puncturing and reaming an atrial septum, the second sheath structure is used for collecting the atrial shunt, and the inner core tube structure is connected with the atrial shunt, so that the atrial shunt reaches the atrial septum and is released. The delivery system for the atrial shunt can be helped to be implanted into the human body, the surgery success rate and the surgery operation convenience are improved, the atrial shunt can be implanted only by passing through the femoral vein, then passing through the heart diaphragm and then operating the delivery system, damage to a patient is small, and the service life of the patient is effectively helped to be prolonged.

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.

The invention discloses an atrial shunt device. The atrial shunt device comprises a storage tube, a supporting tube and a puncture shunt part, wherein a containing space is formed in the storage tube; the supporting tube is arranged in the containing space; the first end of the puncture shunt part is detachably connected with the supporting tube, and a spinal part is arranged at the second end of the puncture shunt part and is configured to be used for puncturing the atrial wall; and the puncture shunt part can move in the axial direction of the storage tube and has a contraction state located in the containing space and an expansion state located outside the containing space, and under the condition that the puncture shunt part is in the expansion state, the puncture shunt part is configured to be fixed to the atrial wall.

The invention relates to an atrial shunt system, and belongs to the technical field of medical instruments. The atrial shunt system comprises an atrial shunt conveying device and an atrial shunt, the atrial shunt conveying device comprises a hanging head switch, a sliding valve, a handle, an outer sheath tube, a pushing tube, a control hanging head, an inner sheath tube and a tip end. the inner sheath tube penetrates through the outer sheath tube, and a tip is arranged at one end of the inner sheath tube; a pushing tube is arranged at the tail end of the outer sheath tube, and a control hanging head is arranged at the tail end of the pushing tube; a handle is arranged at the end, close to an operator, of the outer sheath tube; a hanging head switch connected with the control hanging head is arranged on the handle; the handle is further provided with a sliding valve connected with the pushing tube; a gap for mounting the atrial shunt is formed between the outer sheath tube and the inner sheath tube; and the atrial shunt is separated from the atrial shunt conveying device by controlling deformation of the hanging head. According to the atrial shunt system, the heart blood can be shunted, so that the purposes of delaying heart failure and treating heart failure are achieved; and the atrial shunt system is relatively simple in structure and safe and reliable to use.

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.

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 invention provides an atrial shunt instrument. The atrial shunt instrument comprises a stent and a conveyor; the stent is of a structure which can be radially contracted and expanded as a whole, and comprises a stent main body which can be implanted and positioned in an atrial septum to construct a stoma, and a recovery part connected to the stent main body; the conveyor comprises a sheathing canal assembly, a grabbing assembly and a handle; the stent is detachably connected onto the far end of the sheathing canal assembly, and the sheathing canal assembly can accommodate the stent which is in a contracted state; the grabbing assembly can be folded or unfolded in the radial direction, the near end of the grabbing assembly is fixedly connected to the far end of the sheathing canal assembly, and the far end of the grabbing assembly is a free end and is provided with a grabbing part extending inwards in the radial direction so as to be combined with or separated from the recovery part of the stent; and the handle is connected to the near end of the sheathing canal assembly and comprises an adjusting assembly connected with the grabbing assembly so as to control the grabbing part to be opened and closed and a conveying assembly used for driving the sheathing canal assembly to move in the axial direction so as to release or contain the stent. According to the atrial shunt instrument of the invention, the stent can be conveniently collected.

The invention relates to the technical field of medical instruments, in particular to an implantable atrium shunting device. The implantable atrium shunting device comprises a left disk, a right diskand a waist disk, wherein disk centers of the left disk, the right disk and the waist disk are shunting holes; a left disk connecting wire is arranged at the maximum diameter of the left disk in a circumferential direction; a wire end of the left disk connecting wire is located on the outer surface of a take-up harness and fixed in a take-up ball; and when the take-up ball rotates relative to thetake-up harness, the left disk connecting wire is wound on the surface of the take-up harness, so that the maximum diameter of the left disk is reduced. Due to the mode and the novel structural design, in the embodiment of the invention, the entire implantable atrium shunting device can be recycled at any time; the technical problem that an existing implantable atrium shunting device cannot be recycled is solved; the life of a patient is prolonged; and the device is recycled more conveniently and quickly.

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 belongs to the technical field of medical instruments, and particularly relates to an atrial shunt conveying system based on electric control. The atrial shunt conveying system comprises a first sheath structure, a second sheath structure, an inner core tube structure and electric control assemblies; the second sheath structure is connected with the first sheath structure and the inner core tube structure, and the inner core tube structure is connected with an atrial shunt; the second sheath structure and the inner core tube structure are provided with the electric control assemblies respectively; the first sheath structure is used for atrial septum puncture reaming, and the second sheath structure is used for collecting the atrial shunt; and the atrial shunt reaches the atrial septum and is released by adjusting the electric control assemblies. According to the system, automatic adjustment can be realized to improve the positioning precision, and manual fine adjustment is also considered to realize accurate positioning, accurate release and convenient operation.

The present disclosure discloses an atrial shunt device. The atrial shunt device includes a storage tube, a support tube, and a puncture shunt. The storage tube has an accommodating space; the support tube is arranged in the accommodating space; the first end of the puncture shunt and the support tube can be The connection is disassembled, the second end of the puncture shunt is provided with a spike, and the spike is configured to pierce the atrial wall; the puncture shunt can move along the axial direction of the receiving tube, and having a contracted state within the receiving space and an expanded state outside the receiving space, the piercing shunt being configured to be fixed to the atrial wall when the piercing shunt is in the deployed state place.

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.