234 results about "Flow diverter" patented technology

Interatrial shunts are described herein that are designed to benefit both the left side of the heart and the right side of the heart. The interatrial shunt is anchored in the atrial septum to permit blood to flow between atrial heart chambers across the atrial septum. In accordance with some aspects, the lumen of the shunt has an effective orifice area selected to permit blood flow across the atrial septum to unload the patient's left ventricle with beneficial effects on the patient's right ventricle. The shunts are structured to be suitably anchored at the atrial septum for long-term implantation. Further, the shunts preferably have insignificant late lumen loss. The interatrial shunts are expected to treat pathologies such as heart failure and pulmonary hypertension.

Devices and methods for treating intraocular pressure are disclosed. The devices include shunts for draining aqueous humor from the anterior chamber to the uveoscleral outflow pathway, including the supraciliary space and the suprachoroidal space. The shunts are preferably implanted by ab interno procedures.

Devices and methods for treating intraocular pressure are disclosed. The devices include shunts for draining aqueous humor from the anterior chamber to the uveoscleral outflow pathway, including the supraciliary space and the suprachoroidal space. The shunts are preferably implanted by ab interno procedures.

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.

An asymmetric device for regulating blood volume distribution across a patient's atrial septum having a first expandable end region and a second expandable end region. The first expandable end region is transitionable from a contracted delivery state to an expanded deployed state in which the first expandable end region extends into the patient's left atrium and an inlet end of the first expandable end region is in a first plane. The second expandable end region is transitionable from a contracted delivery state to an expanded deployed state in which the second expandable end region extends into the patient's right atrium and an outlet end of the second expandable end region is in a second plane, such that the first plane intersects the second plane. The device further includes a neck region joining the first expandable end region to the second expandable end region, wherein the neck region is sized and shaped for placement in the patient's atrial septum.

Systems, devices, and methods for shunting blood from one anatomical chamber / vessel to another anatomical chamber / vessel are described. For example, a dual frame shunt can include an anchoring frame / structure that is configured to self-expand and to anchor the shunt within an opening between two anatomical chambers / features. The shunt can also include an adjustable frame / structure disposed outside or inside of at least a portion of the anchoring frame and configured to expand / adjust to various sizes.

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.

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.

Neurovascular flow diverter and delivery systems, and methods of using the same are described herein. The systems can include a customizing member including 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 customizing member includes a tubing extending along and around a distal portion of the introducer sheath. This tubing is cuttable and contains a distal end of the flow diverter. The length of the flow diverter can be customized by cutting through the tubing and the therein contained flow diverter.

Systems and methods for delivering a device for regulating blood pressure across a patient's atrial septum are provided. The delivery apparatus may include a first catheter, a hub having one or more engagers disposed thereon, the one or more engagers configured to releasably engage with a first expandable end of the shunt in a contracted delivery state within a lumen of a sheath, and an second catheter extending through a center lumen of the first catheter and the hub, wherein the first catheter, the hub, and the second catheter are independently moveable relative to the sheath. The inventive devices may reduce left atrial pressure and left ventricular end diastolic pressure, increase cardiac output, increase ejection fraction, relieve pulmonary congestion, and lower pulmonary artery pressure, among other benefits. The inventive devices also may be used to treat subjects having heart failure, pulmonary congestion, or myocardial infarction, among other pathologies.

Gas trap devices and methods of use such as uses for intravenous medial use are described. They effectively prevent gas bubbles from migrating distally towards a patient in use. They may have a priming port which is used only once and permanently sealed at priming. There may be a particle filter to also prevent migration of particles towards the outlet, and this may be across the full cross section of the chamber between the diverter and the outlet conduit.

In one example, a proportioning valve, comprises a valve body, a first fitting coupled to the valve body, a second fitting coupled to the valve body, and a third fitting coupled to the valve body, where the second fitting and the third fitting each extend in parallel to the first fitting. In one example, an inner bore of the valve body is substantially cylindrical. In one example, the first fitting is an outlet fitting, the second fitting is a first inlet fitting, and the third fitting is a second inlet fitting. In another example, the first fitting is an inlet fitting, the second fitting is a first outlet fitting, and the third fitting is a second outlet fitting. In one example, the valve body includes a flow diverter positioned within the valve body.

An apparatus and a method for estimating a production flow rate at a certain position of a well, the apparatus has a compartment being in fluid communication with a fluid within a pipe for forming part of a production string via a first passage and a second passage. A portion of wellbore fluid within the pipe is urged through the compartment by a flow diverter provided at least at one of the at least first passage and the at least one second passage. A ratio between a flow (Fi, Fo) through the compartment and the flow (F) through the pipe is constant, wherein the constant ration is known from tests and / or calculations. A measured flow through the compartment is used for estimating a flow through the pipe of the apparatus.

A fluid or blood diverter is provided in the needle housing of a needle assembly for redirecting the inflowing blood to a distal section of the fluid diverter that may be enclosed by the distal portion of the needle housing so that a clinician can readily view the blood flash without having to look back to the flashback chamber at the proximal portion of the needle housing. At the distal section, the inflowing blood is redirected to the flashback chamber. The needle housing with the blood diverter is adapted to be used in safety catheter needle assemblies that may include a passive needle safety control mechanism including a clip guard. Different ways of coupling the needle housing and the clip guard with catheter hub assemblies with and without passive blood control are also described.

A heat moisture exchanger (HME) having a rotatable bypass channel includes a rotating cylinder having a first port and an outer cylinder having a second port attached to the rotating cylinder. A half-cylinder shaped foam insert is configured within the rotating cylinder to heat and moisturize air moving through the HME. The cylinder is configured to create a rotational bypass to air using an angled diverter moving between the first port and second port such that the rotating cylinder can be moved between a position for engaging the foam insert and a bypass position for bypassing the foam insert.

A downhole pumping system for subsea use is provided. The pumping system is designed such that all fluid conduits and electrical signal conduits are internalized within the pumping assembly. This design provides a substantially constant and elongated profile for the pumping assembly. The pumping assembly includes a housing containing the power assembly, a power actuator assembly operably linked to the production fluid assembly, and a central bore extending through the pumping assembly to provide fluid communication between the power assembly and a first end of the pumping assembly. The pumping system also includes a flow distributor / connector at the first end or the pump head for providing fluid communication between the pump head and a delivery system extending from the surface to the pumping system. The communicating fluids include a high pressure power hydraulic fluid, a low pressure discharge hydraulic fluid, and a pressurized production wellbore fluid.

Embodiments described herein relate to a shunt for treating an aortic aneurysm. In some embodiments, the shunt may include a central portion, an arterial sealing structure, and a venous sealing. In some embodiments, the venous sealing structure may have a lateral length in its deployed configuration, and the arterial sealing structure having a lateral length in its deployed configuration that is greater than the lateral length of the venous sealing structure. A method of implanting the shunt may include selecting the shunt based on a lateral thickness of a thrombus formed in an aortic aneurysm determined by imaging of the aortic aneurysm. The shunt may be advanced in a delivery configuration through a venous puncture site of a vein to access an arterial puncture site of the artery, and then deployed, thereby enabling blood flow through the central portion of the shunt from the artery to the vein.

Systems and methods for implanting a shunt for regulating blood pressure between a patient's left and right atria are provided. The shunt comprises an anchor having a neck region, first and second end regions, and a conduit affixed with the anchor formed of a biocompatible material that is resistant to transmural and translation tissue ingrowth and that reduces a risk of paradoxical embolism. The shunt may be advanced through the sheath until the first region protrudes from the sheath and self-expands within the left atrium. The shunt and the sheath may then be retracted until the first region contacts the left side of the atrial septum. The sheath may further be retracted until the counterforce exerted by shunt tension on the atrial septum overcomes the friction of the retained portions of the shunt such that the second region is exposed from the sheath and self-expands within the second atrium.

A device includes a pre-sample reservoir, an actuator mechanism, and a diverter. The pre-sample reservoir can be fluidically coupled to a delivery member to receive and isolate a predetermined volume of bodily-fluid withdrawn from a patient. The actuator mechanism is operably coupled to the pre-sample reservoir such that, when actuated, a negative pressure is formed in the pre-sample reservoir that urges the bodily-fluid to flow into the pre-sample reservoir. The diverter can selectively control fluid flow between the delivery member and the pre-sample reservoir. The diverter includes a flow control mechanism that defines a first fluid flow path and a second fluid flow path. The diverter is movable between a first configuration in which the bodily-fluid flows through the first fluid flow path to the pre-sample reservoir, and a second configuration in which the bodily-fluid flows through the second fluid flow path to a sample reservoir coupled to the diverter.

Embodiments described herein relate to a shunt including a self-adjusting mechanism for treating conditions such as an aortic aneurysm. In some embodiments, the shunt may include a central portion, a distal end, and a proximal end. In some embodiments, the distal end of the shunt may be configured to roll proximally (e.g., into a toroidal structure) when the shunt transitions from a delivery configuration to a deployed configuration. In some embodiments, the distal end of the shunt may be configured to roll and / or unroll after deployment such that a length of the shunt can be adjustable to accommodate changing anatomy. In some embodiments, the proximal end may be configured to expand into a disc-like shape when the shunt transitions from the delivery configuration to the deployed configuration.

Disclosed are flow diverters including a self-expanding tubular member comprising a plurality of expandable cells having interconnected zig-zag rings and diagonal struts. The tubular member has a constrained configuration having a first outer diameter of at least 1.0 mm sized for delivery using a flow diverter delivery system and an expanded configuration having a second outer diameter larger than the first outer diameter. Related devices, delivery systems, and methods of using the devices and delivery systems for treating disease, particularly intracranial and cerebral aneurysms by deploying implantable expandable devices, are provided.

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.

A method may involve creating a first opening in a right pulmonary artery and a second opening in a superior vena cava. A shunt may be percutaneously delivered into the first opening and the second opening. A stent may be percutaneously delivered into the superior vena cava adjacent to the shunt. The stent can comprise a covering to at least partially prevent flow of blood from the shunt through the stent and / or may be at least partially flexible to allow the stent to bend away from walls of the superior vena cava in response to inflow of blood through the shunt. The stent may be sized to seal against the superior vena cava at a first end and a second end of the stent to trap blood between the stent and the walls of the superior vena cava.

The invention provides a soil reducing inorganic sulfide continuous extraction device and a use method thereof. The extraction device comprises a brown reaction bottle, a first sealing bottle plug is arranged at a bottle opening of the brown reaction bottle, and a gas replacement needle, a sample injection needle and a liquid replacement needle are arranged on the first sealing bottle plug; the reagent deoxidizing bottle is connected with the sample injection needle through a first liquid flow divider and a first multi-channel injection pump; a second sealing bottle plug is arranged at a bottle opening of the reagent deoxidizing bottle, a first needle tube, a second needle tube and a third needle tube are respectively arranged on the second sealing bottle plug, a needle seat of the second needle tube is connected with a second two-way valve, the second two-way valve is connected with a first liquid diverter, the first liquid diverter is connected with a first multi-channel injection pump, and the second liquid diverter is connected with a second multi-channel injection pump. A channel of the first multi-channel injection pump is connected with an eighth two-way valve on the sample injection needle seat; and the absorption liquid deoxidizing bottle is connected with the liquid changing needle through a second liquid diverter and a second multi-channel injection pump. The detection efficiency and stability of the soil reducing inorganic sulfide are improved.

There is provided a flow diverter for integration within a production string that is emplaced within a wellbore for effecting separation of reservoir fluid into gas-depleted reservoir fluid and gas-enriched reservoir fluid. The flow diverter is configured for, amongst other things, mitigating corrosion and erosion phenomena.

The present invention discloses a biodegradable molybdenum-based flow diverter and a preparation method thereof, wherein the preparation method comprises the following steps: step 1. pretreatment of a molybdenum wire: cleaning and drying the molybdenum wire, and then weaving to obtain the molybdenum-based flow diverter; step 2. performing heat treatment on the molybdenum-based flow diverter in the step 1; and step 3. performing surface chemical polishing treatment on the molybdenum-based flow diverter subjected to the heat treatment in the step 2. The present invention solves the technical problem that the flow diverter in the prior art cannot be degraded in vivo and therefore easily causing various complications. It provides also improved mechanical property, MRI magnetic resonance imaging (MRI) compatibility as well as biocompatibility, and particularly has the function of promoting rapid endothelialization, compared with other degradable materials.

An apparatus for shunting blood includes a flow-indication chamber shaped to define an entry port and an exit port, and one or more moveable objects disposed within the flow-indication chamber and configured to move in response to a flowing of the blood from the entry port to the exit port. At least a portion of a wall of the flow-indication chamber is transparent so as to expose the moveable objects to sight. Other embodiments are also described.

The present invention relates to a bore access spool assembly comprising a housing (2) having a longitudinal axis, an upper end (3) of the housing being configured for connection to a riser, a lower end (4) of the housing being configured for connection to a subsea well assembly. The housing further comprises an upper bore (5) located at the upper end, and a plurality of lower bores (6, 6a) located at the lower end, a chamber (7) extending along the longitudinal axis linking the upper and lower bores. A diverter sleeve (11) is provided for introduction into the housing chamber (7) through the upper bore (5), the diverter sleeve (11) being open at its upper end to allow access into a sleeve interior from the upper bore (5), and having an angled kick surface (17) at a lower end of its interior, the diverter sleeve (11) and housing (2) having respective guide formations. The diverter sleeve (11) is configured to be received within the chamber (7) and guided into position through interaction of the guide formations to a deployed state to block a first one (6a) of the plurality of lower bores (6a, 6b), and to divert communication of the upper bore (5) instead to be with a second one (6b) of the plurality of bores.

A shunt for treating glaucoma that includes a silicone rubber duct for diverting aqueous humor from a chamber of a patient's eye and a fixation body frictionally located on the duct in an arrangement permitting sliding displacement of the fixation body, for fixing and sealing the duct within scleral tissue surrounding the eye. The duct has a rigid proximal portion having a proximal end and a deformable distal portion locatable in the scleral channel and having a distal end. The distal portion is severable, allowing a surgeon to cut the distal portion to a desired length corresponding to the anatomical dimensions of the patient's eye and a required bleb position. The proximal portion has a capillary lumen having a diameter which is smaller than the diameter of a lumen of the distal portion, thereby reducing a flow rate of aqueous humor along the capillary lumen.

Disclosed is a system including a flow regulating system. The flow regulating system may assist in ensuring a selected pressure within an inlet volume. The flow regulator may be included in a shunt assembly. The shut assembly may include an inlet catheter configured to assist in maintaining an open flow path therethrough.