90 results about "Hemostasis valve" patented technology

There is provided an introducer system for percutaneously delivering a first and a second medical device to a patient. The system may comprise an introducer sheath having a longitudinal axis and a lumen formed therein. The system may also comprise a bifurcated hub coupled to a proximal end of the sheath. The hub may comprise a first arm having a first lumen and a first hemostasis valve for the passage of the first medical device. The hub may also comprise a second arm coupled to the first arm and having a second lumen and a second hemostasis valve for the passage of the second medical device. Further, the hub may comprise a connection port such that the first lumen and the second lumen are in communication with the lumen of the introducer sheath for the passage of at least one of the first and second medical devices through the introducer sheath for delivery to the patient.

A rigidizing device includes an elongate flexible tube having a lumen extending therethrough, a variable stiffness layer, a bladder layer configured to push against the variable stiffness layer when pressure is applied, and a hemostasis valve integrated at a proximal end of the elongate flexible tube in fluid communication with the lumen wherein the rigidizing device is configured to change between a flexible configuration and a rigid configuration in which the bladder layer limits the plurality of strand lengths from moving relative to each other when pressure is applied.

A rigidizing device includes an elongate flexible tube having a lumen extending therethrough, a variable stiffness layer, a bladder layer configured to push against the variable stiffness layer when pressure is applied, and a hemostasis valve integrated at a proximal end of the elongate flexible tube in fluid communication with the lumen wherein the rigidizing device is configured to change between a flexible configuration and a rigid configuration in which the bladder layer limits the plurality of strand lengths from moving relative to each other when pressure is applied.

A hemostasis valve capable of controlling a flow of fluid in a tube or catheter to and from a vasculature of a human patient or animal subject. An exemplary embodiment of the hemostasis valve includes a valve member having a lumen with a proximal end and a distal end for receiving flexible tubing or a catheter. The hemostasis valve includes one or more constricting wires that are tensioned by connections to valve member components. The hemostasis valve includes one or more force receiving contact surfaces connected to at least one of the one or more constricting wires configured to cause the contracting wires to constrict the flexible tube or catheter passing therethrough, when the one or more force receiving contact surfaces are in flow restricting state. The force receiving contact surfaces cause the constricting wires to release the flexible tube or catheter passing therethrough, when the one or more force receiving contact surfaces are in a not is a flow restricting state.

There is provided an introducer system for percutaneously delivering a first and a second medical device to a patient. The system may comprise an introducer sheath having a longitudinal axis and a lumen formed therein. The system may also comprise a hub coupled to a proximal end of the sheath. The hub may comprise a first arm having a first lumen and a first hemostasis valve for the passage of the first medical device. The hub may also comprise a second arm coupled to the first arm and having a second lumen and a second hemostasis valve for the passage of the second medical device. Further, the hub may comprise a connection port such that the first lumen and the second lumen are in communication with the lumen of the introducer sheath for the passage of at least one of the first and second medical devices through the introducer sheath for delivery to the patient.

The invention relates to the technical field of medical instruments, and provides a hemostasis valve structure and a sheathing canal assembly, and in the hemostasis valve structure, a valve body assembly is connected with a sheathing canal body. The two ends of the annular bag body are connected with the valve body assembly respectively, the middle of the annular bag body naturally droops, and the annular bag body is of a flexible inelastic bag body structure. And the liquid filling assembly is communicated with the annular bag body. When no instrument passes through the sheathing canal body, liquid is filled into the annular bag body through the liquid filling assembly, so that the annular bag body is expanded until the annular bag body is completely closed, and the sealing effect is achieved. When an instrument needs to be arranged in the sheathing canal body in a penetrating mode, liquid in the annular bag body does not need to be discharged, and the instrument can directly penetrate through the annular bag body in the expanded state. On one hand, operation is time-saving and labor-saving; on the other hand, due to the fact that the annular bag body is in the expansion state all the time, blood cannot flow out between the instrument and the annular bag body, and the blood loss risk is avoided.

A hemostasis valve may be used with a catheter such as an aspiration catheter. The hemostasis valve comprises a support, and at least a first lever, pivotably carried with respect to the support. A collapsible tubular sidewall defining a valve lumen is carried by the support. A filament is formed into a loop around the tubular sidewall, the filament having at least a first tail portion extending away from the loop to the first lever. A first spring may be configured to move the first lever in a direction that pulls the first tail portion away from the tubular sidewall, reducing the diameter of the valve lumen in response to reducing the diameter of the loop. A second tail portion may extend away from the loop to a second lever. Each tail portion may be attached to its respective lever, or may be slidably advanceable around a fulcrum on the lever and attached with respect to the support.

Provided are a valve and a medical device provided with the same. The hemostasis valve is a valve that is embedded into the valve container in the sheath hub (valve housing) of the sheath. Through the hemostasis valve, a tubular introduction member such as a dilator or a catheter is inserted. The hemostasis valve includes a first partition wall in a proximal side, a second partition wall in a distal side that is provided adjacently to the first partition wall, and a lubricant storage that is provided between the first partition wall and the second partition wall, the lubricant storage having capability of storing lubricant. The lubricant storage consists of a flat cylindrical concave formed on the inner (inside) face of the first partition wall in the central axial direction.

The utility model discloses an intervention conveying device, which particularly relates to the medical field and comprises a conveying sheath tube seat, an external thread end ring is arranged at one end of the conveying sheath tube seat, a conveying sheath tube is connected to the inner side of the external thread end ring, and a developing ring is mounted at the end of the conveying sheath tube. An external thread is arranged at the other end of the conveying sheath tube and located in the external thread end ring, a tilting part is arranged at one end of the external thread end ring, the external thread of the external thread end ring is connected with a nut, a hemostasis valve is installed at the other end of the conveying sheath tube seat, and one end of the hemostasis valve is communicated with a connecting tube. A locking structure is designed after the conveying sheathing canal is in threaded connection with the external thread end ring, the stability when the conveying sheathing canal is connected with the external thread end ring is improved, the phenomenon of loosening is not prone to occurring, comfort when an operator holds the conveying sheathing canal and the external thread end ring is improved conveniently, and the conveying sheathing canal can be locked when the conveying sheathing canal and the external thread end ring are loosened and placed after connection is completed. And the collision strength with a placement surface during placement is buffered, and the placement stability is improved.

A medical device assembly includes a medical device and a detachable hemostasis valve. The medical device includes a hub that defines a lumen extending through the hub, and a normally open seal that is disposed within the hub, and an access sheath cap that is adapted to reversibly close the normally open seal. The normally open seal includes an aperture extending through the normally open seal that is coaxial with the lumen. The detachable hemostasis valve includes a valve hub that is adapted to be removably secured to the access sheath cap and a normally closed seal assembly that is disposed within the valve hub.

Devices to minimize the passage of air across a introducer's hemostasis valve when a medical device is inserted therethrough. A kit includes a sheath (12) and a sheath hub (20) attached to the proximal end of the sheath. The sheath hub includes a housing (26), a proximal cap (28) that defines an aperture (29) into the housing, and a hemostasis valve gasket (30) within the housing. The kit also includes a straightener (32) with a cross-section that prevents advancement of the straightener through the aperture of the sheath hub far enough to breach the gasket. The sheath can also include a pressure equalizer configured to equalize a pressure within the sheath lumen ahead of a leading edge of the medical device moving therethrough with a pressure within the sheath lumen behind the leading edge of the medical device moving therethrough without drawing air through the hemostasis valve assembly.

A vacuum aspiration system may be used to treat thromboembolic disease, such as deep vein thrombosis or pulmonary embolism. The system includes a housing, and a fluid flow path extending through the housing. An aspiration catheter is in fluid communication with the flow path, and a connector is configured to place a source of aspiration in communication with the flow path. A hemostasis valve is provided in the housing. The housing may be configured to receive and releasably engage a thrombus engagement tool.

A hemostasis valve may be used with a catheter such as an aspiration catheter. The hemostasis valve comprises a support, and at least a first lever, pivotably carried with respect to the support. A collapsible tubular sidewall defining a valve lumen is carried by the support. A filament is formed into a loop around the tubular sidewall, the filament having at least a first tail portion extending away from the loop to the first lever. A first spring may be configured to move the first lever in a direction that pulls the first tail portion away from the tubular sidewall, reducing the diameter of the valve lumen in response to reducing the diameter of the loop. A second tail portion may extend away from the loop to a second lever. Each tail portion may be attached to its respective lever, or may be slidably advanceable around a fulcrum on the lever and attached with respect to the support.

A medical device assembly includes a medical device and a detachable hemostasis valve. The medical device includes a hub that defines a lumen extending through the hub, and a normally open seal that is disposed within the hub, and an access sheath cap that is adapted to reversibly close the normally open seal. The normally open seal includes an aperture extending through the normally open seal that is coaxial with the lumen. The detachable hemostasis valve includes a valve hub that is adapted to be removably secured to the access sheath cap and a normally closed seal assembly that is disposed within the valve hub.

The sheath tube based on the efficient sealing hemostasis valve comprises a sheath tube body and the hemostasis valve, and the hemostasis valve comprises a shell and a protruding seat connected with the shell. The sheathing canal is provided with the two elastic plugs and the two annular bag parts, and therefore the catheter inserted into the sheathing canal and the dilator can be better sealed. And a space where hydraulic oil is located is arranged, so that when the instrument exits, the hemostasis valve can be quickly sealed, and air is prevented from entering the hemostasis valve.

An apparatus for providing access to a patient's vasculature according to one aspect of the present invention comprises a dilator having a distal tip, a proximal end and a main body extending therebetween. The dilator includes a first lumen extending from the proximal end to the distal tip and a second lumen extending in parallel to the first lumen between the proximal end and a side port provided in the main body spaced proximal to the distal tip by a distance. The apparatus further comprises a first hemostasis valve in fluid communication with the first lumen at the proximal end of the dilator and a second hemostasis valve in fluid communication with the second lumen at the proximal end of the dilator. A retrograde guidewire is provided positionable within the first lumen of the dilator for advancement therein from the proximal end toward the distal tip and adapted to project therefrom by a first preselected distance. A deflection microcatheter is also provided positionable within the second lumen for advancement therein from the proximal end toward the side port and adapted to project therefrom by a second preselected distance and an antegrade guidewire positionable within a lumen of the deflection microcatheter for advancement therein from the proximal end toward the side port and adapted to project therefrom by a third preselected distance.

The utility model relates to a diameter-variable blood vessel sheath structure, which solves a series of problems of large operative wound, incapability of intraoperative radiography and the like in the process of treating lower limb artery embolism by opening a Fogarty catheter to take thrombus. The device comprises an outer sheath, an inner sheath and a sheath core which are sequentially nested from outside to inside, the outer sheath comprises an outer sheath main body and an outer sheath base arranged at the near end of the outer sheath main body; the inner sheath comprises an inner sheath body, an inner sheath base is arranged at the near end of the inner sheath body and connected with a hemostasis valve, the far end of the inner sheath body is connected with a self-expansion covered stent sample structure with two open ends, and the length of the inner sheath is larger than that of the outer sheath. The sheath core comprises a sheath core body, a sheath core base is arranged at the near end of the sheath core body, a conical end with the outer diameter gradually reduced is arranged at the far end of the sheath core body, a middle hole for a guide wire to penetrate through is formed in the sheath core body, and the length of the sheath core is larger than that of the inner sheath. The utility model has the advantages of high effectiveness, high safety, strong adaptability, good adaptability, simple structure and convenient operation.

This product is a right-handed medical device for inserting long objects, comprising a main body, an insertion tube provided at the tip of the main body, and a base support provided at the base end of the main body. When using this product, as shown in the reference front view illustrating the state of use, the main body is grasped with the right hand by placing the fingers other than the thumb on the finger rest of the main body, and a long medical object (e.g., a microcatheter, guidewire, etc.) is inserted into the lumen of a medical device (e.g., a connector with a hematemesis valve, catheter hub, etc.) by using the thumb to feed it.

A tightening port for use with a hemostasis valve of an introducer sheath includes a gripper configured for engagement with the hemostasis valve hub, the gripper having a proximal end, a distal end, a cylindrical body defining a lumen, and a plurality of protrusions extending from the proximal end, a base having a cylindrical body and a lumen defined therethrough for receiving a portion of the gripper, and a plurality of engagement features configured for engaging with the plurality of protrusions of the gripper, and wherein the lumen of the gripper has an initial diameter prior to engagement with the base, and the lumen of the gripper has a compressed diameter after engagement with the base, wherein the compressed diameter is less than the initial diameter.

A hemostasis valve body provides strong sealing around a medical device during insertion of the medical device into a blood vessel, low forces for tearing, and stability during insertion of the medical devices as well as during peel away. The valve body comprises a first surface, a second surface opposite the first surface, an edge, helical slits, and a pair of longitudinal cuts. The helical slits are positioned at a center of the valve body and traverse the first surface to the second surface. The helical slits provide a seal around the medical device. Each respective longitudinal cut extends from the first surface partially through the valve body to a depth short of the second surface for at least part of a length of the respective longitudinal cut. The longitudinal cuts facilitate a separation of the valve body into two parts during a peel away action.

Hemostasis valve devices and methods of use are disclosed. The hemostasis valve devices include a body member, a slide member, an introducer member, a valve cap, and a valve member. The body member and slide member can be gripped by a user's finger and thumb, respectively. The slide member can be distally displaced by the user's thumb to distally displace the introducer member through the valve member to open the valve member to allow passage of a medical appliance through the valve member. The introducer member can be selectively locked in a distal position to keep the valve open.

An aspiration control device can have an aspiration control valve and a switch, button, slider, trigger, grip, lever, rotating wheel, rotating valve, handle or other interface for resizing the aspiration control valve. The aspiration control interface can be conveniently positioned and configured to be manipulated while simultaneously stabilizing a catheter and / or retracting an elongated member. The aspiration control device can be integrated with a hemostasis valve, integrated with a wire gripping device, and / or attached to an inlet, outlet, hose, pump, or syringe in series with an aspiration flow path.

A hemostasis valve for use with catheters in intravascular procedures. The hemostasis valve comprising a sealable fluid channel that bifurcates from a single distal lumen to two proximal lumens. An upper proximal lumen may include a funnel shaped opening to improve aspiration potential. Rotating locking mechanisms are attachable at the ends of the hemostasis valve to interlock coaxial devices or to form seals around coaxial devices. Injection molding may be used to manufacture a hemostasis valve and its components. A mold and core pins may impart external and internal shapes to a molten polymer. Once the polymer has cooled, the molded component is separated from any pins or molds and attached to other molded components to form an assembled hemostasis valve.

A hemostasis valve may be used with an aspiration and / or thrombectomy catheter. The hemostasis valve can be moved between a first configuration in which the valve lumen is closed and a second configuration in which the valve lumen is open. The hemostasis valve can comprise a frame, a collapsible tubular sidewall, a first filament, a second filament, a first lever, and a second lever. The first and second filaments can be formed into respective first and second loops around the collapsible tubular sidewall. The first and second filaments may be slidably advanceable around the first and second levers. The first and second levers may be depressed to tension the first and second filaments, causing the first and second loops to circumferentially constrict the collapsible tubular sidewall and close the valve lumen. The hemostasis valve may be biased to the first configuration by a biasing device.

A hemostasis valve for use with an access device such as a catheter. The hemostasis valve may be connected to a housing to which the catheter may be connected. The hemostasis valve may include a deformable, resilient tubular member having a passageway. The hemostasis valve be adjustable between a first position in which the passageway is sealed and a second position in which the passageway is unsealed. The passageway may be sealed by one or more cams, with the cams being biased towards the sealed position such that, absent active application of force, the cams revert back to an original position to seal the passageway.

The invention relates to the technical field of medical instruments, in particular to a blood bypass system. The system comprises an artery sheath assembly, a vein sheath assembly and a bypass pipeline. The arterial sheath assembly comprises an arterial sheath and an arterial sheath dilator, and the arterial sheath is configured to enter the common carotid artery to receive blood flow; the vein sheath assembly comprises a vein sheath and a vein sheath dilator and is configured to enter a vein blood vessel; the bypass pipeline is connected with the vein blood vessel and the vein blood vessel, comprises a filtering unit and is used for filtering embolus particles in the blood flow and releasing the filtered blood flow to the vein blood vessel; the artery sheath comprises a straight branch and a hemostasis valve, and the hemostasis valve is provided with an adjusting mechanism capable of repeatedly adjusting the opening diameter. By establishing an artery-vein shunt channel, blood reflux is guided, and the risk that emboli enter brain blood vessels is reduced; the adjustable hemostasis valve adapts to different instrument diameters, the sealing performance and the passing ability are guaranteed, and the operation convenience and safety are improved.

The invention relates to the field of medical instruments, and discloses a hemostasis valve and an introducer sheath system comprising the same. The hemostasis valve comprises a fixed piece, a rotating piece and a conical sealing piece. The rotating piece is arranged on the fixed piece in a sleeving mode and can do spiral motion around the fixed piece, and the rotating piece is coupled with the conical sealing piece so that the conical sealing piece can longitudinally move in the channel of the fixed piece. The fixing piece is provided with a conical face, and the far end of the conical sealing piece is suitable for being in sealing fit with the conical face. When the rotating piece does spiral motion around the fixed piece, the rotating piece can drive the conical sealing piece to move between the first position and the second position, and then the channel is closed or opened. The hemostasis valve is convenient and fast to operate, and dynamic sealing of the hemostasis valve can quickly act by rotating the rotating piece.

The invention provides a backflow protection device which comprises a backflow pipeline arranged between an artery and a vein, and the backflow pipeline comprises a main pipeline, a hemostasis valve and a filtering pipeline which are connected in sequence; the filtering pipeline comprises an inflow pipeline, a middle pipeline and an outflow pipeline which are sequentially connected, the inflow pipeline is connected to the hemostasis valve, and a filter is arranged on the middle pipeline; wherein the inner diameter and the length of the return pipeline are configured in a way that the total fluid resistance coefficient K of the return pipeline is greater than or equal to 2.0 ml <-1 > and less than or equal to 3.0 ml <-1 >. Through the configuration, the long-standing problem that the countercurrent flushing effect and cerebral perfusion cannot be balanced is solved.

The invention provides a hemostasis valve and a catheter sheath comprising the same. The hemostasis valve comprises a valve body and a magnetic control assembly. The valve body is provided with a valve cavity for an instrument to pass through, and the valve cavity can be filled with magnetofluid; the magnetic control assembly is arranged on the valve body and used for providing a working magnetic field for the magnetic fluid in the valve cavity so that the magnetic fluid can seal the valve cavity when an instrument is inserted into the valve cavity or no instrument is inserted into the valve cavity. The catheter sheath comprises a sheath tube body and a hemostasis valve, and the far end of the hemostasis valve is hermetically connected with the near end of the sheath tube body. An instrument channel in the valve body is sealed through the magnetic fluid, the magnetic fluid can provide good sealing performance, friction force on instruments passing through the magnetic fluid is small, the operation hand feeling is better, misjudgment is avoided, and the operation success rate is increased.

A hemostasis valve includes a first hub and a second hub arranged with respective faces facing each other. An elastomeric tube extends between the first hub and the second hub and includes an inner surface defining part of a device lumen extending through the housing, and a plurality of cord segments extending from the first face to the second face, each of the plurality of cord segments circumferentially spaced from neighboring cord segments. Relative rotation between the first hub and the second hub causes each of the plurality of cord segments to cinch down onto an outer surface of the elastomeric tube and compress the elastomeric tube down into the device lumen, thereby sealing between the inner surface of the elastomeric tube and any elongate device extending through the device lumen.