50 results about "Hemostasis valve" patented technology

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.

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.

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 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.

A hemostasis valve, a catheter sheath, and a method for sealing an interventional instrument (9), the hemostasis valve comprising a housing (1,100) and a sealing film (2,130) which is installed within the housing (1,100) and which is a tubular structure; an inner cavity (21) of the tubular structure serves as an instrument channel (11,131) and penetrates the housing (1,100); driving chambers (12,150) which are located on the periphery of the sealing film (2,130) and which are used for being filled with a fluid are provided within the housing (1,100); the hemostasis valve further comprises an energy storage mechanism (3) that can link with the fluid; the energy storage mechanism (3) correspondingly stores or releases energy when the state of the sealing film (2,130) changes; and the sealing film (2,130) is driven to seal the instrument channel (11,131) during energy release. By means of the design of the energy storage mechanism (3), deformation energy of the sealing film (2,130) is stored, thereby achieving good compatibility and a good sealing effect when different instruments pass through; in addition, by means of the configuration of parameters of the sealing film (2,130), the configuration of parameters of an energy storage structure, and the cooperation between the two, the advantages of good drawing operation feeling and small operating force changes of an instrument are achieved, and a structural basis is provided for other functions.

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.

Air blocks are described. In one embodiment, an air block may include an outer shell having an outer shell lumen. The outer shell may have an outer shell first split separably coupled to an outer shell second split. The air block may also include a tool guide coupled to the outer shell at least partially in the outer shell lumen. The tool guide may have a tool guide proximal opening and a tool guide distal opening. The tool guide may have a tool guide lumen. The tool guide may have one or more fenestrations configured to allow fluid communication between the tool guide lumen and the outer shell lumen. The tool guide may have a tool guide first split separably coupled to a tool guide second split. The air block may also include a proximal hemostasis valve coupled to the tool guide proximal opening. The air block may also include a distal hemostasis valve coupled to the tool guide distal opening. The outer shell may be configured to be split along a full length of the tool guide lumen into the outer shell first split and the outer shell second split. The tool guide may be configured to be split along the full length of the tool guide lumen into the tool guide first split and the tool guide second split.

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.

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.

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.