33 results about "Hemostasis valve" patented technology

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.

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 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 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.

This disclosure provides a hemostasis valve, a catheter sheath, and a method for sealing an interventional instrument. The hemostasis valve includes a housing defining a through-region; a sealing membrane disposed in the through-region and having a tubular structure with a lumen configured as an instrument passage; a driving chamber defined between an outer periphery of the sealing membrane and an inner wall of the through-region for filling fluid; and a balancing chamber communicated with the driving chamber and located outside the driving chamber and in the housing. The hemostasis valve includes an energy storage mechanism linked in motion with the fluid, the fluid is linked in motion with the energy storage mechanism via the balancing chamber, the energy storage mechanism is configured for storing or releasing energy when state of the sealing membrane is changed and driving the sealing membrane to close the instrument passage when releasing energy.

The invention relates to the technical field of tearable tube sheaths, in particular to a tearable shunt tube sheath for ventricular jugular vein shunt, which comprises a catheter sheath and a mounting base inserted into the upper end of the catheter sheath, the catheter sheath is detachably connected with the mounting base, and an expansion catheter is fixedly mounted at the upper end of the mounting base. A hemostasis valve is mounted at the lower end of the mounting base; mechanical locking and pressing force adjustment are conducted on the two tearable tubes through the connecting piece, the situation that a traditional tube sheath needs to be torn open is avoided by pulling the pulling-out unit, the connecting piece is stably and linearly pulled out as a whole, and in the process, instant traction force and vibration generated due to material tearing and buckle separation when a sheath tube is torn in a traditional mode are completely avoided; the risk of tiny displacement of the tip of the accurately positioned shunt tube caused by sheath tube removal operation is eliminated, the shunt tube is always stabilized at the optimal position in the middle of the right atrium, and the operation success rate is increased.

The present disclosure provides a tearable sheath assembly comprising: an introducer comprising an introducer body, a locking cap, an introducer sheath, and a hemostasis valve, the introducer having a longitudinal axis and an internal cavity, the introducer main body, the locking cover, the guide sheath and the hemostasis valve are respectively provided with a weak part along the direction of the longitudinal axis; and the locking cap and the hemostasis valve are configured to be connected to the introducer main body such that weak portions of the introducer main body, the locking cap and the hemostasis valve are aligned in a longitudinal direction and the introducer main body, the locking cap and the hemostasis valve can be torn together when a peel force is applied to the introducer main body; and a dilator configured to be insertable through the interior cavity of the introducer to be connected to the introducer and to be retractable from the interior cavity of the introducer. The tearable sheath assembly is compact in structure and easy to tear.

An access device for a vascular graft is disclosed. The access device can allow two large-diameter medical devices to be inserted at the same time. The access device may include a body defining a common arm, a first proximal arm, and a second proximal arm. The common arm may include a common lumen extending from a distal end of the common arm to a proximal end of the common arm. The first arm may include a first lumen extending from a proximal end of the first arm to the common lumen. The second arm may include a second lumen extending from a proximal end of the second arm to the common lumen. The access device may include a plurality of hemostasis valves. A first hemostasis valve may be disposed at a proximal end of the first proximal arm. A second hemostasis valve may be disposed at a proximal end of the second proximal arm.

An introducer sheath assembly for percutaneously delivering a medical device that maintains hemostasis in a patient. The assembly has a hub, a hub cap and a hemostasis valve. The introducer sheath assembly has a longitudinal axis and a lumen formed therein. The hemostasis valve has a frame portion and a valve portion, the valve portion having a plurality of slits that are offset through the thickness of the valve portion therein and an extension of the frame portion formed from an incompressible material. The extension of the frame portion is received by a valve seat feature in the hub, when the valve is received by the hub. The valve seat feature also receives a seating portion of the hub cap as the hub and hub cap are advanced into engagement, the seating portion of the hub cap advanced into the valve seat feature subjecting the incompressible extension of the frame portion to a compressive force.

The application provides a guide assembly, a sheath seat and a hemostasis valve. The guide assembly comprises a sealing structure. The sealing structure is formed with a guide channel. A guided member can pass through the sealing structure through the guide channel and is guided by the guide assembly to a corresponding position in a human body. The sealing structure comprises a weakened structure. The weakened structure is arranged on opposite sides of the guide channel. After the guide assembly is used, an operator can tear the sealing structure from the weakened structure and withdraw the guide assembly from the human body. The difficulty of tearing the guide assembly is reduced. On this basis, a reinforcing structure is arranged in the sealing structure. During use of the guide assembly, the reinforcing structure can cooperate with the weakened structure to improve the structural strength of the weakened structure and further improve the sealing capacity of the weakened structure.

The utility model belongs to the technical field of catheter sheath devices, and particularly relates to a catheter sheath device with a hemostasis valve, which comprises a hemostasis valve body, one end of the hemostasis valve body is connected with a sheath tube, the side surface of the hemostasis valve body is connected with a branch tube, the other end of the branch tube is fixedly connected with a three-way valve, and the hemostasis valve body comprises a valve head, a valve body and a top head, a second fixing ring is fixedly connected to the inner wall of the valve body, a hard sealing piece is arranged on one side of the second fixing ring, an adjusting ring is rotationally connected to the outer wall of the valve body, a gear ring is fixedly connected to the inner wall of the adjusting ring, and mounting grooves are formed in the upper position and the lower position of the end, close to the top head, of the valve body. Under the mutual cooperation of the adjusting ring, the toothed ring, the lead screw, the gear, the ejector head, the mounting cylinder and the guide pipe, the interventional catheter can conveniently pass through the hard sealing piece, and effective sealing can be formed by using the hard sealing piece.

An apparatus includes a hub including a front port, a side port, and a back port including a hemostasis valve. The apparatus further includes a sheath extending from the hemostasis valve through the front port and shaped to define one or more lateral openings within the hub. The sheath is configured for insertion into a blood vessel such that, subsequently to the insertion, a rate of flow of blood between the side port and the blood vessel via the lateral openings is controllable using an instrument passing through the hemostasis valve and into the sheath such that the instrument closes at least a portion of the lateral openings. Other embodiments are also described.

An apparatus for providing access to a patient's vasculature comprises a dilator having a first lumen extending from a proximal end to a 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 and second hemostasis valves in fluid communication with the proximal ends of the first and second lumens, respectively. A retrograde guide wire is provided positionable within the first lumen of the dilator and adapted to project from the distal tip by a first preselected distance. A deflection microcatheter is also provided positionable within the second lumen and adapted to project from the side port by a second preselected distance and an antegrade guide wire positionable within a lumen of the deflection microcatheter and adapted to project from the side port by a third preselected distance.

The invention discloses a guiding device for constructing an intervention channel, a transcatheter intervention system and a pre-expansion method. The guiding device comprises an outer sheath, a hemostasis valve and a driving part. The outer sheath is of a tubular structure which can deform in the radial direction. The hemostasis valve is connected to the near end of the outer sheath; the driving piece comprises a head part and a transmission part, and the driving piece has an initial position and a working direction pointing to the near end from the initial position. The driving piece moves in the working direction to expand the outer sheath until the outer sheath is withdrawn out of the body, efficiency is improved, resistance of the outer sheath to the driving piece is reduced, the operation difficulty of traction operation is lower, and the requirement for the structural strength of the transmission part is lower.

The utility model provides a coaxial catheter system for implanting a stent electrode, which comprises an outer tube body, an inner tube body, an inner tube body, an inner tube body, an inner tube body and an outer tube body, and is characterized in that the right end of the outer tube body is connected with an outer tube body tube seat; the right side of the middle tube body is connected with a middle tube body tube seat, and the left end of the middle tube body is connected with the outer tube body tube seat through an outer tube body rotary hemostasis valve; the right end of the inner tube body is connected with an inner tube body tube seat, the left end of the inner tube body is connected with a middle tube body tube seat through a middle tube body rotary hemostasis valve, and the right end of the inner tube body tube seat is connected with an inner tube body rotary hemostasis valve. According to the whole structure, flexibility and strength are balanced, operation performance is improved, strong supporting performance at the near end and excellent passing performance and supporting performance at the far end are achieved, a complex venous access can be safely and effectively navigated, and a support electrode is smoothly fed into the anterior superior sagittal sinus from the jugular vein.

A medical system including an implantable medical, the lead comprising a lead body and a helical electrode at least one of extending or extendable from a distal end of the lead body. The medical system including a hemostasis valve coupled to the lead body proximal the distal end of the lead body, the hemostasis valve configured to slide along the lead body. The distal end of the lead body is configured for insertion into an introducer hub positioned in an opening into a vasculature of a patient and the lead body configured for subsequent advancement through the introducer hub to facilitate securing the hemostasis value to the introducer hub. The hemostasis valve is configured for slidable advancement of the lead body therethrough for continued advancement of the lead body through the introducer hub.

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.

A hemostasis valve assembly may include a housing with a lumen extending between a proximal and distal opening. A nonpermeable membrane may have a proximal and distal ends operably coupled to a proximal and distal housing portions, respectively, so that a fluidly-sealed volume is created which is bounded in part by the membrane and in part by an interior surface of the housing, the lumen being bounded in part by the membrane. A piston is positioned at least partially within the housing, and a biasing member is operably coupled to the piston and is configured to apply force on the piston in a direction toward the membrane. When the fluidly sealed volume is filled with a noncompressible fluid, a first portion of the membrane is in contact with a second portion of the membrane to seal a portion of the lumen between the proximal opening and the distal opening.

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.

The utility model relates to the technical field of medical instruments, in particular to a connecting valve special for removing thrombus, which comprises a thrombus guide tube, a first connector, a second connector, a hemostasis valve and a branch tube, a plug is arranged in the branch tube, a clamping block is arranged in a clamping groove formed in the plug, and the clamping block can move along the clamping groove; the thrombus guiding valve has the advantages that the thrombus guiding pipe is a straight pipe, the flowing path of thrombus in the valve is a straight line, no dead angle exists on the path, and thrombus blockage can be avoided; besides, the plug is arranged in the branch tube, and only a thrombus breaking device such as a guide wire is allowed to pass through the plug, so that thrombus cannot enter the branch tube, the thrombus breaking device such as the guide wire can enter the thrombus guide tube through the clamping groove, and normal use of the thrombus guide tube is not hindered; furthermore, the end, close to the thrombus guide tube, of the plug is in an arc shape with the same radian as the thrombus guide tube, so that the inner wall of the thrombus guide tube becomes smooth, dead angles in the thrombus guide tube are reduced, thrombus blockage is avoided, and operation efficiency is improved.