94 results about "Hemostatic Valve" patented technology

Devices, systems, and methods for sealing medical devices, particularly during intravascular access, are disclosed herein. Some aspects relate to a hemostatic valve for sealing a wide range of medical devices, such as catheters, wires, embolectomy systems. The valve can include an elongate member having a first end, a second end, and a central lumen extending therebetween. A reinforcement structure extends along at least a portion of the elongate member and is coupled to the elongate member. A shell defining a first aperture and a second aperture may be included, which first and second apertures can be fluidly coupled by the elongate member. A tensioning mechanism is coupled to the shell and to the elongate member, the tensioning mechanism can be moveable between a first configuration wherein the tensioning mechanism is collapsed and the central lumen is sealed and a second configuration wherein the central lumen is open.

Devices, systems, and methods for sealing medical devices, particularly during intravascular access, are disclosed herein. Some aspects relate to a hemostatic valve for sealing a wide range of medical devices, such as catheters, wires, embolectomy systems. The valve can include an elongate member having a first end, a second end, and a central lumen extending therebetween. A reinforcement structure extends along at least a portion of the elongate member and is coupled to the elongate member. A shell defining a first aperture and a second aperture may be included, which first and second apertures can be fluidly coupled by the elongate member. A tensioning mechanism is coupled to the shell and to the elongate member, the tensioning mechanism can be moveable between a first configuration wherein the tensioning mechanism is collapsed and the central lumen is sealed and a second configuration wherein the central lumen is open.

The disposable tearable catheter sheath comprises a sheath tube and an expansion tube penetrating through the interior of the sheath tube, a sheath tube connector is arranged at the insertion rear end of the sheath tube, tearing marks are arranged on the two sides of the surface of the sheath tube in the axis direction, and an expansion tube connector is arranged at the insertion rear end of the expansion tube. And a sealing assembly is arranged between the sheath tube joint and the expansion tube joint. The hemostasis valve is simple in structure and reasonable in design, it is guaranteed that a doctor can tear the sheath conveniently and rapidly, a torn opening is smooth, damage to blood vessels and nerves of a patient is reduced, and the firmness of the hemostasis valve is guaranteed.

The disclosed technology includes an insertion tool including a first body including a hemostasis valve configured to receive a flexible shaft and prevent fluid flow through the hemostasis valve. The insertion tool may include a second body coupled to the first body, the second body including a chamber, a guide tube smaller than the chamber, and a valve. The guide tube may be connected distal to the chamber and along a longitudinal axis of the second body to guide a flexible shaft into a sheath, and the valve may be at least partially disposed in the guide tube. The valve may be biased to a closed position and prevent fluid flow through the valve when a flexible shaft is inserted therethrough.

The present disclosure relates to a tearable sheath assembly, the tearable sheath assembly comprising: an introducer comprising an introducer body, a locking cap, and an introducer sheath, the introducer having a longitudinal axis and an internal cavity, the introducer body and the introducer sheath being provided with a weak portion in a direction of the longitudinal axis; and a hemostasis valve including a weakness, the hemostasis valve configured to prevent leakage of liquid to an exterior of the tearable sheath assembly. The present disclosure also relates to a hemostasis valve.

A system for insertion into a vasculature of a patient is disclosed. The system utilizes a primary tubular sheath body coupled to a distal portion of an intermediate tubular sheath body, and a hub coupled to a proximal portion of the intermediate tubular sheath. The hub may be couplable to a dilator via an interaction between a dilator cap and the hub, and the hub may contain a hemostatic valve with a foam member having one or more visibly identifiably regions.

The present application discloses a feedback-regulated hemostatic valve, a catheter sheath, and a sealing method for an interventional device. The feedback-regulated hemostatic valve includes a housing and a sealing membrane installed in the housing and having a tubular structure. The inner cavity of the tubular structure serves as an instrument channel. A driving chamber for filling a fluid is provided in the housing and is located outside the sealing membrane. The feedback-regulated hemostatic valve further includes a pressurizing mechanism for feeding back blood pressure changes to the fluid. The technical solution disclosed in the present application, through the arrangement of the pressurizing mechanism, feeds back blood pressure changes to the fluid, thereby adaptively adjusting the sealing pressure of the sealing membrane, improving the effect of the sealing membrane closing the instrument channel during the movement of the interventional device relative to the sealing membrane, improving the operation experience of operators such as medical staff, providing a stable treatment process, and improving the treatment effect.

[Problem] To provide a medical instrument which enables selective switching of a hemostatic valve assembly between an open state and a closed state by means of a simple operation, and which makes it possible to smoothly insert a dilator or a medical device even in the closed state. [Solution] A housing member 210 of a hemostatic valve assembly 200 comprises: a cylindrical region 215d that is positioned closer to the distal end side than a push-in member 220; and an inclined region 215c that continuously extends from the distal end of the cylindrical region toward the distal end side, and that has a first through hole 217 having a diameter which decreases from the base end toward the distal end. The push-in member is configured to be movable between a first position P1 at which the base end portion 233 of a seal member 230 is positioned in the cylindrical region, and a second position P2 which is positioned closer to the distal end side of the cylindrical region in comparison to the first position and at which at least a portion of the distal end portion 231 of the seal member is pushed into the inclined region. The diameter of an insertion hole 237 of the seal member decreases from the base end surface 233a toward the distal end surface 231a, and the inclination angle θ1 of the inclined region is more obtuse than the inclination angle θ2 of the insertion hole.

The present invention is entitled "Suction Control Valve". The present invention provides a suction control device that may have a suction control valve and a switch, button, slider, trigger, grip, lever, rotary wheel, rotary valve, handle, or other engagement portion for adjusting the size of the suction control valve. The suction control engagement portion may be conveniently positioned and configured to be operated while simultaneously stabilizing the catheter and / or retracting the elongate member. The suction control device may be integrated with a hemostatic valve, integrated with a wire gripping device, and / or attached to an inlet, outlet, hose, pump, or syringe in series with the suction flow path.

Introducer sheath systems including a pressure regulator operably coupled to a hemostatic valve, wherein the pressure regulator includes a chamber filled with a gas that is fluidly isolated from the hemostatic valve. The introducer sheath systems may include a tubular sheath, a hub assembly, and a dilator disposed therein connected to a proximal end of the sheath; the hub assembly including a housing and a hemostatic valve disposed therein; a pressure regulator connected to the hub and in fluid communication with the hemostatic valve; and a sealed chamber defined by the pressure regulator, the chamber having an interior, wherein the interior of the chamber is filled with a gas that is fluidly isolated from the hemostatic valve.

The invention discloses a continuously-sealed hemostasis valve, and relates to the technical field of medical instruments, the continuously-sealed hemostasis valve comprises a valve seat and a hemostasis gasket group, the hemostasis gasket group is integrally made of a soft rubber material, and the hemostasis gasket group comprises an upper gasket mechanism and a lower gasket mechanism; the upper gasket mechanism and the lower gasket mechanism are sequentially arranged in the valve seat in a matched mode, and the lower gasket mechanism comprises a thick-wall annular body and a thin-wall extending sleeve body. Sealing in the operation process is kept through the first hemostatic pad, the second hemostatic pad and the lower pad mechanism, after a medical instrument sequentially penetrates through the first hemostatic pad, the second hemostatic pad and the lower pad mechanism, the pads made of soft silica gel materials can be conveniently attached to the outer wall of the instrument, the sealing performance is guaranteed, and after the medical instrument is withdrawn, the medical instrument can be conveniently taken out. The tail part of the thin-wall extension sleeve body of the lower gasket mechanism is thin and soft, so that the thin-wall extension sleeve body is easy to fit and seal, and the thin-wall extension sleeve body is propped against the gasket due to the internal pressure of a human body to form a self-sealing function.

The present invention relates to apparatus for fluid management in a robotic catheter-based surgical system. A cassette for use in a robotic drive of a catheter-based surgical system includes a housing configured to support a hemostasis valve having a base and a side port. The housing has a longitudinal device axis associated with an elongated medical device. The cassette further includes a first tube connection point on the housing and above the longitudinal device axis. The first tube connection point is configured to receive a first tube. The cassette further includes a second tube connection point near a top edge of the housing and above the first tube connection point and the longitudinal device axis. The second tube connection point is configured to receive a second tube.

This invention relates to a hemostatic valve, comprising: a first tube having opposing first and second ports; a second tube disposed within the first tube, with a radial gap between the first and second tubes; a first connector, fitted at the first port and used to control the opening or closing of the second tube; in use, the gap is connected to the bloodstream through the first connector; a second connector, fitted at the second port and used to control the opening or closing of the second tube, and the gap is isolated from the outside through the second connector. This hemostatic valve achieves triple sealing through blood filling, providing excellent sealing performance. Furthermore, the radial gap between the first and second tubes is automatically filled with the patient's own blood from within the blood vessel, eliminating the need for additional filling with other liquids. This makes operation simple and convenient, ensures high safety, guarantees pressure balance within the hemostatic valve, and allows for adaptation to interventional devices of different sizes and shapes, providing a sufficient and reliable seal. It exhibits high adaptability and strong compatibility.

The invention 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 arterial embolism of lower limbs through open thrombus extraction of a traditional Fogarty catheter. 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 device has the advantages of high effectiveness, high safety, strong adaptability, good adaptability, simple structure and convenience in operation.

This invention discloses a controllable bending catheter and its control handle. The controllable bending catheter has a guidewire in its lumen and a pair of draw wire cavities parallel to the axial direction in its wall thickness. Each of the draw wire cavities contains a traction wire. The distal end of the controllable bending catheter is flexible, and the pair of traction wires have different lengths. The control handle has, from far to near, an end cap, an end cap, a knob tube, a handle cap, a handle cap, and a hemostatic valve. Internally, it contains a core rod and a wire-connecting screw. In this invention, the control handle uses a single-threaded screw, and the pair of traction wires in the controllable bending catheter have different lengths, realizing bidirectional controllable bending of the catheter. Compared with the existing bidirectional controllable bending catheter control handles that use positive and negative double-threaded screws, it has fewer components, lower manufacturing costs, smoother transmission, less effort in bending control, and is easier to produce and assemble.

A system and method include operation of a device coupled to a base to hold a catheter to the base, the catheter defining a lumen in which a portion of an elongated medical device is disposed, and a portion of the catheter being disposed in a hemostasis valve, movement of the base relative to the hemostasis valve along a first path while the catheter is held to the base such that the catheter moves relative to the hemostasis valve, and operation of a mechanism coupled to the base to maintain a position of the elongated medical device within the lumen relative to the hemostasis valve while the base and the mechanism are moved along the first path and the catheter is held to the base.

The application discloses a hemostasis valve assembly and a device for delivering a delivery system, and applies to the technical field of medical devices, and has the technical scheme as follows: a head end hemostasis part comprises a hollow circular table provided with a first cavity, and a first hemostasis channel is arranged on the head side of the hollow circular table; a blocking filter membrane is installed on the tail side of the hollow circular table and blocks the first cavity, and a second hemostasis channel is arranged on the blocking filter membrane; a middle end hemostasis part comprises a ring-shaped cylinder provided with a second cavity, and the head end of the ring-shaped cylinder is in abutment with the blocking filter membrane; a tail end hemostasis part is sleeved on the tail part of the ring-shaped cylinder and is used for blocking the second cavity, a third hemostasis channel is arranged on the tail end hemostasis part, the first hemostasis channel, the second hemostasis channel and the third hemostasis channel are arranged along the same axis, and when a penetrating object is withdrawn in a reverse order, the blocking filter membrane moves to the tail side direction to make the pressure of the second cavity greater than the pressure of the first cavity. The application can reduce the occurrence of blood leakage and achieve a good blood sealing effect.

The utility model relates to the technical field of medical devices, and discloses a tearable sheath, which comprises a sheath tube main body seat, a hemostasis valve main body and a dilator handle, the bottom of the sheath tube main body seat is fixedly connected with a tube body, a mounting groove is arranged in the hemostasis valve main body, two sides in the mounting groove are fixedly connected with positioning ribs, and the positioning ribs are fixedly connected with the dilator handle. A cap is arranged at the top of the hemostasis valve body, a cap protrusion is arranged on the cap, a first sealing gasket is arranged in the mounting groove, a second sealing gasket is arranged at the top of the first sealing gasket, and a dismounting assembly is arranged at the bottom of the hemostasis valve body. According to the utility model, the sheathing canal main body seat, the sheathing canal clamping jaw, the hemostasis valve main body, the connecting column, the groove and the O-shaped sealing ring are matched to work, the hemostasis valve and the sheathing canal are split, the hemostasis valve is detached during tearing, only the canal seat and the sheathing canal body need to be torn, the tearing force can be reduced, and the hemostasis valve main body seat and the sheathing canal main body are rotationally locked through the buckle, so that the hemostasis valve is convenient to use. The operation is convenient.

An access device for a heart chamber, a removable hemostatic valve unit, and a system including a cardiac assist unit are disclosed. In examples, the access device includes an apical base plate and a sealing unit configured to provide a separation of a wet zone from a heart chamber and a dry zone with a gaseous environment outside of said heart chamber inside a patient body at the same time.

A guiding sheath has a hemostatic valve and a central lumen into which a diagnostic or treatment catheter can be introduced and guided into a patient. The hemostatic valve also includes an electrically conducting element or proximity sensing element on its proximal end that interacts with a second electrically conducting element or proximity sensing element on a proximal end of the diagnostic or treatment catheter that can be passed through the central lumen of the guiding sheath and into the patient's heart. The interaction between the two electrically conducting elements or proximity sensing elements enables the location of the distal end of the diagnostic or treatment catheter in the patient's heart without the need for irradiating the patient.

The present invention discloses a push-type medical Y-type hemostatic valve, which relates to the field of medical device technology. The key points of its technical solution are: it includes a hollow cylindrical valve body, a hollow cylindrical common joint is obliquely connected to the side wall of the valve body, the inner cavity of the common joint is connected to the inner cavity of the valve body, a sealing joint is provided at one end of the valve body, an internal thread groove is provided in the joint, a check valve is provided in the inner cavity of the valve body near the common joint, the check valve is fixedly connected to a locking hose, a locking device is provided on the outside of the locking hose, and a box body is provided on the outside of the locking device. The locking structure of the Y-type hemostatic valve of the present invention is simple and easy to operate; at the same time, the locking component is arranged on the side of the valve body, which can avoid affecting the insertion of tubes and guide wires; and the hemostatic component can achieve low resistance when inserting tubes, facilitating tube insertion, and prevent blood from flowing back.

The embodiment of the present specification provides a hemostasis valve, comprising: a shell provided with a channel and a through hole, wherein the channel is suitable for passing a suction catheter, and the through hole is through the channel and has an included angle; and an execution component, which is partially accommodated in the through hole and is suitable for continuous movement in the through hole to squeeze or release the suction catheter. By using the above scheme, the adaptability, airtightness and convenience can be considered.

The present invention provides a spiral buckle hemostatic valve and a catheter sheath having the same, belonging to the technical field of medical devices, wherein the spiral buckle hemostatic valve comprises: a first assembly part and a second assembly part that are threadedly matched, a sealing part is arranged between the first assembly part and the second assembly part, wherein in the threaded structure matched with the first assembly part and the second assembly part, at least part of the section is provided with a spring piece that can move radially, and the threaded match between the first assembly part and the second assembly part can be released in a loosening direction by moving the spring piece radially, so that the first assembly part and the second assembly part can be moved relatively away from each other in the axial direction; the spiral buckle hemostatic valve of the present invention can squeeze the sealing part by relatively rotating the first assembly part and the second assembly part, so that the caliber of the sealing part is reduced, and when a larger device needs to be inserted, the caliber of the sealing part is expanded by pressing the spring piece radially, and the operation is easy during surgery.

A novel hemostasis valve-equipped indwelling needle that is capable of discharging air in an internal flow path includes a cannula to be inserted percutaneously into a blood vessel on a distal end side thereof, a link connector on a proximal end side thereof, an internal flow path extending from the cannula to the link connector, and a hemostatic valve disposed inside the link connector. An air vent passage that allows the internal flow path to communicate with an external space is formed in the link connector further on the cannula side than the hemostatic valve, and a filter that allows gas to pass through but does not allow liquid to pass through is mounted in a compressed state on the air vent passage.

An improved catheter device (20) is used in conjunction with a hemostasis valve (32) having a compression seal (42) for temporarily forming a reduced inner diameter (D3) within a valve cavity (40) of the hemostasis valve (32). The device (20) comprises an elongate conduit (22) having at least one protrusion (44) extending radially outward from an outer surface (30) of the conduit (22), the at least one protrusion (44) having an outer diameter (D4) smaller than a neutral inner diameter (D2) of the valve cavity (40) but larger than a reduced inner diameter (D3) of the valve cavity (40). In use of the device (20), the catheter (22) is located at a distance within the valve cavity (40), and the compression seal (42) then creates a reduced inner diameter (D3) within the valve cavity (40), and the at least one protrusion (44) contacts the compression seal (42) and prevents the catheter (22) from sliding out of the hemostasis valve (32).

The present invention provides a hemostatic valve, sheath, and catheter sheath assembly. The hemostatic valve comprises a valve body and a valve core disposed within the valve body. The valve core comprises a valve core body and a cover connected to the distal end of the valve core body. An axial through-hole is defined within the valve core body, and the cover opens or automatically closes relative to the valve core body to expose or seal the axial through-hole. This hemostatic valve offers an ideal sealing effect, prevents blood leakage or gas intrusion, and is highly reliable. It is particularly suitable for use with larger-diameter dilators or other diagnostic and treatment instruments.

Introducer sheath systems including a pressure regulator operably coupled to a hemostatic valve, wherein the pressure regulator includes a chamber filled with a gas that is fluidly isolated from the hemostatic valve. The introducer sheath systems may include a tubular sheath, a hub assembly, and a dilator disposed therein connected to a proximal end of the sheath; the hub assembly including a housing and a hemostatic valve disposed therein; a pressure regulator connected to the hub and in fluid communication with the hemostatic valve; and a sealed chamber defined by the pressure regulator, the chamber having an interior, wherein the interior of the chamber is filled with a gas that is fluidly isolated from the hemostatic valve.

A system and method include operation of a device coupled to a base to hold a catheter to the base, the catheter defining a lumen in which a portion of an elongated medical device is disposed, and a portion of the catheter being disposed in a hemostasis valve, movement of the base relative to the hemostasis valve along a first path while the catheter is held to the base such that the catheter moves relative to the hemostasis valve, and operation of a mechanism coupled to the base to maintain a position of the elongated medical device within the lumen relative to the hemostasis valve while the base and the mechanism are moved along the first path and the catheter is held to the base.

Devices and methods for providing a hemostatic valve fluid seal within a guide catheter or delivery apparatus are disclosed. An example delivery apparatus includes a seal housing assembly that includes a seal housing and a seal stack disposed within the seal housing. The seal stack includes a fluid seal having a first surface, having a circular shape, and a second surface, having a circular shape, disposed opposite to the first surface. The fluid seal defines a slit extending from the first surface to the second surface through centers of the first and second surfaces.