1497results about "Occulders" patented technology

An atraumatic vessel occlusive system includes a flexible tubular member with an infusion lumen, a vessel occluder mounted at the distal end of the tubular member, and a pressure sensor located within a chamber defined by the occluder. The occluder has a braided construct provided with a fluid impermeable membrane over its proximal portion and a fluid permeable covering over its distal portion. The pressure sensor is adapted to sense pressure within the vessel through the fluid permeable membrane without being subject to the effects of turbulent flow at the exit of the infusion lumen. The accurately sensed pressure can be used to determine a dwell time for the occluder.

The invention provides an intravascular occluder which comprises an occluder body, a catheter part and a control mechanism, the occluder body is of an umbrella-shaped structure formed by a plurality of frameworks which can be opened, and a layer of covering is attached to the occluder body; the catheter part is used for accommodating the plugging device and the connecting rod part of the control mechanism; the control mechanism comprises a connecting rod part and a handle control part, and is used for controlling the pushing and withdrawing of the plugging device; after the plugging device is unfolded to completely plug the inner diameter of the blood vessel, the function of cutting off blood flowing can be achieved, a space for blood flowing can be reserved at the position close to the inner wall of the blood vessel by properly retracting the plugging device into the catheter, and the plugging device can be completely retracted into the catheter by completely retracting the plugging device. The device has the advantages that unfolding and folding are completely reversible, controllable opening and cutting of blood flow can be achieved, complications caused by long-time ischemia of blocked blood vessels can be avoided, and a long-time operation becomes possible.

An anti-hemorrhaging device includes an elongate body, a flexible looped segment, a shield, and an inflatable seal. The elongate body is configured to attach to a vacuum source. The flexible looped segment is attached to the elongate body includes a plurality of holes on an inner circumference thereof. The flexible looped segment is configured to be placed in a uterus. Activation of the vacuum source is configured to pull vacuum through the plurality of holes so as to collapse the uterus upon insertion of the elongate body into the uterus. The shield is folded around an exterior circumference of the looped portion and has edges that extend radially inwards relative to the flexible looped distal section. The shield is configured to prevent tissue from occluding the plurality of holes when vacuum is applied. The inflatable seal is attached to the elongate body and is configured to seal the uterus.

Neurovascular flow diverter and delivery systems, and methods of using the same are disclosed herein. The systems can include an introducer sheath, a catheter, a deployable flow diverter that can be contained in the introducer sheath or in the catheter, a core wire, and one or several deployment features coupled to the core wire and engaging the flow diverter. The deployment features can include one or more of a pusher, one or several friction bumps, one or several deployment coils, a claw mechanism, a self-expanding element, a supporting coil, a tip coil, and / or an atraumatic tip. One or more of the deployment features can be radiopaque.

An intracorporeal robot (1) for deployment in a body tract, comprising: - a permanent magnet constituting an effector magnet (2) configured to be guided by an extracorporeal actuating magnet (105), and - a medical device (3) coupled to the effector magnet, the medical device comprising a shape memory structure (4) configured for tetherless actuation by an extracorporeal shape memory actuator (105).

Systems and methods are described for modulating blood flow through a blood vessel. Devices may include one or more implantable devices comprising an expandable frame comprising a proximal end and a distal end and a longitudinal axis extending therethrough; a membrane comprising an inflow end and an outflow end, wherein the inflow end is at least partially installed within the distal end of the expandable frame; an actuator coupled to a control wire, the control wire being coupled to a portion of the membrane; a first magnet configured to induce rotation of the actuator to actuate the control wire to activate application of tension to the control wire and cause the membrane to radially collapse at the outflow end; and a second magnet configured to generate a changing magnetic field pole direction to cause rotation of the first magnet to cause the membrane to radially expand at the outflow end.

Devices, systems, and methods for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium are disclosed. Devices and methods include a method for causing retrograde oxygenated blood flow in at least a portion of the venous system of the myocardium, the method comprising: implanting a variable occluder in a coronary sinus region proximate a left atrium, wherein the variable occluder is configured to gradually increase a level of blood flow restriction over a period of days to enable a venous system of the myocardium to compensate for increased pressure caused by the gradual increase in the level of blood flow restriction; and following venous system compensation, shunting oxygenated blood flow into the coronary sinus to cause retrograde flow of oxygenated blood in at least a portion of the venous system of the myocardium to thereby enable revascularization of the myocardium.

Systems and methods for blood flow control are described herein. In some variations, a blood flow control system may comprise a blood flow control device. The blood flow control device may be placed within a body of a patient and may comprise an expandable member and a sensor. The sensor may be configured to measure at least one of a physiologic condition of the patient and a pressure associated with the expandable member. The blood flow control system may include at least one controller communicably coupled to the sensor to: receive data indicative of at least one of the physiologic condition of the patient and the pressure associated with the expandable member from the sensor, compare the received data with target data, identify at least one error based on the comparison, and in response to identifying the error, inhibit at least one function of the blood flow control system.

The invention provides an implant release system and an embolism interventional therapy device, and relates to the field of medical instruments.The implant release system comprises a push rod and a control line, the far end of the push rod is provided with a limiting block, and the limiting block is provided with a first containing cavity and a containing groove used for containing a connecting rod; the pushing rod is further provided with a second containing cavity used for containing the release head, the second containing cavity is located on the near end side of the limiting block, an opening allowing the release head to be disengaged is formed in the radial direction of the second containing cavity, and the orientation of the opening is consistent with the orientation of the containing groove. The control line is located in the hollow cavity of the push rod, and a cushion block is arranged at the far end of the control line. The implant can be smoothly released, the structure is simple, and the release operation is convenient.

Pulmonary treatment devices, systems and methods of use are provided which take into account the vast tissue damage of advanced COPD sufferers and provide treatments designed specifically to treat the particularly compromised lung tissues that are present in these patients. These treatments reduce trapped air volume, tension lung tissue and enhance lung elastic recoil. In particular, a variety of embodiments of pulmonary treatment devices are provided. The devices are comprised of a shape memory material wherein the devices are able to be expanded under tension, and then are able to recoil back toward an original relaxed or resting shape as the devices are deployed into the tissue. This action causes the pulmonary treatment devices to corkscrew into damaged tissue, becoming sufficiently entwined to allow pulling of the tissue by retraction of the device. This in turn re-tensions the lung causing lung volume reduction.

This disclosure relates to a catheter system that for precisely positioning fluid flow restrictors within a blood vessel. In particular, this disclosure provides a catheter system that includes a sheath with a first fluid flow restrictor mounted thereto, and a catheter that is slidably disposed within the sheath and has a second fluid flow restrictor mounted thereto. Inside a blood vessel, the sheath and the catheter are separately slidable, thereby allowing the first and second fluid flow restrictors to be positioned at precise locations within the blood vessel.

An example aneurysm implant can include a tubular braid that can have an open end, a pinched end, and a predetermined shape. In the predetermined shape, the tubular braid can have three segments and two inversions, one of the three segments extending between the two inversions and forming a sack. Two of the segments can form a substantially semispherical shape. The tubular braid can be implanted in an implanted shape based on the predetermined shape. The substantially semispherical shape of the tubular braid can aid in decreasing a pulsatile blood inflow rate and a pulsatile blood outflow rate for a substantially spherical aneurysm cavity.

A distal tip of a surgical tool includes a tip body and an expandable member that extends around the tip body. The tip body defines an end portion that defines an attachment surface and an elongate member that is configured to be inserted within a tubular shaft of the surgical tool. The elongate member also defines a recessed channel that terminates at the end portion. The expandable member is secured to the attachment surface with a chemical bond and is adjustable between an expanded configuration in which at least a portion of the expandable member extends radially outward from the tip body and a collapsed configuration in which at least the portion of the expandable member is oriented substantially parallel to the tip body.

A left atrial appendage closure (LAAC) device is adapted for occluding a patient's left atrial appendage (LAA). The LAAC device includes a shape memory foam occlusive element that is adapted to expand from a crimped configuration for delivery to an expanded configuration after deployment, the shape memory foam occlusive element including in its expanded configuration a distal face, a proximal face and an intervening periphery. A reinforcing member is disposed relative to the shape memory foam occlusive element and is adapted to limit deformation of the shape memory foam occlusive element after the shape memory foam occlusive element has expanded into the expanded configuration.

The invention discloses an intermittent occlusion balloon catheter system for treating heart failure. The system comprises a five-cavity double-balloon catheter, the five-cavity double-balloon catheter comprises a cavity tube body, a first balloon arranged in a pulmonary artery and a second balloon arranged in a superior vena cava, and the first balloon and the second balloon are both fixed to the surface of the cavity tube body; a round head is arranged at the far end of the cavity tube body, and the diameter of the round head is not larger than the outer diameter of the catheter. The near end is connected with the extension tube assembly through an injection molding head; the cavity tube body is provided with five cavity channels which are respectively communicated with the first balloon extension tube, the second balloon extension tube, the thermistor extension tube, the far-end extension tube and the near-end extension tube; the injection pump is driven by the stepping motor, and the controller adjusts the advancing and retreating motion period of the stepping motor, so that the injection pump is controlled to charge and discharge liquid to the second balloon. By intermittently blocking the superior vena cava, the heart filling pressure is reduced, and therefore heart hyperemia and volume overload are prevented.

The present disclosure relates to a catheter, an arrangement and a system and methods of using the same. The catheter comprises an occlusion member configured for occluding a blood vessel to limit blood flow through the blood vessel. The catheter is configured to provide a first passage and / or a second passage , wherein the respective passage is configured to provide a connection between an interior of the catheter and an exterior of the catheter within the blood vessel. The first passage is configured to provide a connection between a first lumen of the catheter and the exterior, and / or the second passage is configured to provide a connection between a second lumen of the catheter and the exterior.

A surgical system includes an ultrasound device and a surgical instrument. The ultrasound device includes a shaft having a body defining a longitudinal axis and including a lumen extending coaxially therethrough, and an ultrasound sensor assembly configured to enable ultrasound imaging of a field of view. The ultrasound sensor assembly is disposed at a distal end portion of the body of the shaft, offset relative to the longitudinal axis, and oriented such that the field of view is offset relative to the longitudinal axis. The surgical instrument is configured for removable insertion through the lumen of the body of the shaft and to extend distally from the distal end portion of the body of the shaft.

According to an aspect, a method of cholecystitis treatment includes: forming a communication hole that communicates a gallbladder and a duodenum; and arranging a bypass tube extending from a cystic duct to the duodenum through an inside of the gallbladder and the communication hole.

The invention provides a sectional type blocking balloon which comprises a balloon catheter, a guide wire catheter, a near-end blocking balloon and a far-end blocking balloon, the near-end blocking balloon and the far-end blocking balloon are sequentially arranged on the balloon catheter, the guide wire catheter is arranged in the balloon catheter in a penetrating mode, and the near-end blocking balloon and the far-end blocking balloon are sequentially arranged on the far-end blocking balloon. A near-end balloon charging and discharging tube and a far-end balloon charging and discharging tube which are used for conveying filling media to the near-end blocking balloon and the far-end blocking balloon respectively are arranged in the balloon catheter, and the portion, between the near-end blocking balloon and the far-end blocking balloon, of the balloon catheter is an exclusive operation area. While the proximal end and the distal end are blocked, a surgical blood vessel repairing operation space is reserved, and the limitation that the proximal end and the distal end of a blood vessel need to be dissociated for blocking in a traditional surgical operation is avoided. The operation efficiency is improved, the workload of medical staff is reduced, and the device is suitable for being widely used and popularized.

A computer implemented method of simulating the deployment of an implantable medical device at a target deployment position within a patient's vascular structure, the method comprising: receiving a three-dimensional model of the patient's vascular structure; representing the implantable medical device as a centreline of the implantable medical device, the centreline comprising a plurality of nodes, where each node is associated with a two-dimensional shape representing the cross-section of the device at the position of the node; positioning the centreline at the target deployment position within the patient's vascular structure; iteratively (i) calculating a force on each node if the corresponding two-dimensional shape contacts or intersects a wall of the vascular structure within the three-dimensional model, (ii) determining a movement of the node based on the calculated force and (iii) updating the position of the node based on the determined movement; determining the deployed position of the implantable medical device based on the position of the nodes of the centreline when a convergence condition is met.

The invention provides a balloon inflation and deflation control method and a computer readable storage medium, the method is applied to a balloon inflation and deflation system, a balloon catheter of the balloon inflation and deflation system comprises a medium cavity and a blood cavity which are mutually independent, and a puncture sheath is provided with a lateral opening; the first sensor is connected with the medium cavity, the second sensor is connected with the lateral opening, and the third sensor is connected with the blood cavity; the method comprises the steps that a pumping mechanism is controlled to inject a filling medium into a balloon, and whether filling of the balloon is completed or not is determined according to a balloon internal pressure value detected by a first sensor and / or a balloon rear pressure value detected by a second sensor or a proximal end blood pressure value detected by a third sensor; determining the discharge amount of each stage according to the total filling amount when filling is completed and the preset discharge percentage of staged discharge; determining the discharge time of each stage according to a preset discharge speed and the discharge amount of each stage; and the pumping mechanism is controlled to discharge the filling medium in stages according to the preset discharge speed and the discharge time of each stage.

The invention relates to a spring ring releasing structure and a spring ring system. The spring ring releasing structure comprises a pushing rod, a notch elastic piece located in the pushing rod and a traction wire connected with the notch elastic piece. The notch elastic piece is provided with a notch used for clamping a spring ring ball head, and the outer side wall of the notch elastic piece abuts against the inner wall of the pushing rod. A releasing groove is formed in the far end of the pushing rod, when the outer side wall of the notch elastic piece abuts against the groove bottom of the releasing groove, the caliber of the notch is larger than the diameter of the spring ring ball head, and when the outer side wall of the notch elastic piece abuts against the inner wall, outside the releasing groove, of the pushing rod, the caliber of the notch is smaller than the diameter of the spring ring ball head. The defects that an existing spring ring release structure limits the filling effect of a spring ring in hemangioma and the tube kicking phenomenon is likely to be caused are overcome, the embolism precision is improved in a free torsion air-finding connection mode, the fracture risk is reduced through low-pressure filling, meanwhile, the reliability of mechanical release is kept, and the safety of the embolism is improved. The method is a targeted upgrade of an interventional embolism spring ring release technology.

Systems and methods for blood flow control are described herein. In some variations, a blood flow control system may comprise a blood flow control device. The blood flow control device may be placed within a body of a patient and may comprise an expandable member and a sensor. The sensor may be configured to measure at least one of a physiologic condition of the patient and a pressure associated with the expandable member. The blood flow control system may include at least one controller communicably coupled to the sensor to: receive data indicative of at least one of the physiologic condition of the patient and the pressure associated with the expandable member from the sensor, compare the received data with target data, identify at least one error based on the comparison, and in response to identifying the error, inhibit at least one function of the blood flow control system.

A system (100) includes a bioprinter (110) having a nozzle (116) that is transluminally advanceable to the heart via a catheter (120). The bioprinter houses a bioink (140) comprising a biomaterial (142). While the nozzle extends from a distal portion (124) of the catheter, the nozzle can extrude the bioink into the heart such that the biomaterial assumes a three-dimensional implant-shape. Other embodiments are also described.

To provide a method and a system for providing or maintaining a flow of fluid passing through the body passage such as a heart chamber and a blood vessel.SOLUTION: A shooting catheter for targeting a second blood vessel from a first blood vessel includes a catheter including a proximal part and a distal part including a needle opening and a flat rectangular radiopaque marker. The flat rectangular radiopaque marker disappears in rotation under fluoroscopy, and provides information on the rotation alignment of the shooting catheter. The shooting catheter includes a needle configured to extend through the needle opening. A method for positioning a catheter includes rotating the catheter in the first blood vessel until the marker has a thickness (e.g., the smallest thickness) under fluoroscopy. The thickness indicates rotation positioning of the catheter.SELECTED DRAWING: Figure 42B

A control system for an occlusion catheter having a balloon includes a fluid reservoir containing a fluid and a fluid connector connectable to the reservoir and to the catheter to provide fluid communication therebetween. The fluid connector has a pressure sensor integrated therein. A pump is configured to move the fluid between the reservoir and the balloon via the fluid connector. A controller is in electrical communication with the pump and the pressure sensor. The controller is configured to: (i) receive data from the pressure sensor, the data being indicative of a pressure within the balloon, and (ii) in an autonomous mode of operation, control the pump to alter a size of the balloon by driving fluid from the reservoir toward the balloon or withdrawing fluid from the balloon, the control of the pump being based, at least in part, on the data from the pressure sensor.

Devices, systems, and methods for treating aneurysms are disclosed herein. According to some embodiments, the present technology includes a treatment system comprising a delivery shaft, a manipulation shaft slidably positioned within the lumen of the delivery shaft, and an occlusive device configured for implantation within the aneurysm. The occlusive device can comprise a plurality of filaments that are secured to one another at a proximal end of the occlusive device by a cured material. The occlusive device can comprise inner and outer layers of braided filaments, wherein the proximal end region of the inner layer has an exposed portion that extends proximally beyond the proximal end region of the outer layer, and wherein the cured material extends into and fills interstices between the braided filaments at the proximal end regions of the inner and outer layers.

A flow restriction system may include an implantable controller system for controlling an implantable flow restrictor. The controller system may include: an implantable housing, an actuator at least partially disposed within the implantable housing, the actuator having a first configuration corresponding to the implantable flow restrictor being in the low profile state and a second configuration corresponding to the implantable flow restrictor being in the high profile pressure restricting state, an internal power source configured to supply current to the actuator, and a processor configured to control operation of the actuator using power from the internal power source.

The invention provides a medical multi-cavity catheter and a medical catheter treatment device, and relates to the technical field of medical instruments.The medical multi-cavity catheter comprises at least two catheter cavities extending in parallel, and the far end of at least one catheter cavity forming the overall dimension of the medical multi-cavity catheter is shorter than the far end of the longest catheter cavity; the medical multi-cavity catheter is provided with a plurality of catheter cavities, so that the overall dimension of the far end of the medical multi-cavity catheter is smaller than that of the near end of the medical multi-cavity catheter, and any one of the catheter cavities is provided with a near-end working opening and a far-end working opening. The diameter of the far-end section of the medical multi-cavity catheter can be reduced, the passing ability and the compliance of the medical multi-cavity catheter can be improved, meanwhile, it can be guaranteed that all the pipe cavities in the medical multi-cavity catheter have large working inner diameters, the operation difficulty of working instruments in the pipe cavities is reduced, and the operation efficiency is improved.

An embodiment includes a system comprising: a backbone; a first polyurethane shape memory polymer (SMP) foam on the backbone; a second polyurethane SMP foam on the backbone; a third polyurethane SMP foam on the backbone and between the first and second SMP foams. Other embodiments are described herein.