54 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 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.

[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 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.

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.

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.

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 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.

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.

The invention belongs to the technical field of medical instruments, and discloses a catheter sheath and a catheter sheath system. The catheter sheath comprises a catheter sheath tube, a catheter sheath base and a hemostasis valve, the hemostasis valve comprises a shell, a sealing body, an elastic body and an abutting piece, the end, away from the catheter sheath tube, of the catheter sheath base is connected with the shell of the hemostasis valve, then a containing space is defined, and the sealing body and the elastic body are arranged in the containing space; the abutting piece penetrates through the sliding groove of the shell, the elastic body is located between the part, placed in the containing space, of the abutting piece and the sealing body, and when the abutting piece is operated to linearly move along the sliding groove, the abutting piece is close to the catheter sheath base and extrudes the elastic body and the sealing body, so that an inner hole of the sealing body is shrunk, and an existing rotary adjusting mode is replaced with a direct pushing mode. The elastic body is matched, operation is rapid and convenient, the deformation degree of the sealing body can be greatly adjusted, and therefore the use requirements of guide wires and instruments of different sizes are met, and the leakage risk is effectively reduced.

An example delivery apparatus includes a housing assembly and a seal stack disposed within the housing assembly. 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 first surface includes first cuts approximately through a center of the first surface and extending partially through the fluid seal toward the second surface. The second surface includes second cuts approximately through a center of the second surface and extending partially through the fluid seal toward the first surface. The second plurality of cuts is angularly offset from the first plurality of cuts.

A clinical personal protection equipment (PPE) system, worn by a healthcare provider, that can include a data display and selectively controls medical equipment. The system includes a computer platform that selectively communicates with a network, such as a Wifi network, and selectively communicates with and controls one or more electronic devices, such as an interactive rotating hemostatic valve and Tuohy-Borst adapter. The headset fits about the head of user and includes a face shield. A camera is located on the headset and is in communication with the computer platform, the camera creating visual data of a forward view from the headset and transmitting the visual data to the computer platform.

This invention relates to an adjustable hemostatic valve device, comprising a catheter sheath housing, a catheter sheath cap, a seal, and an opening adjustment mechanism. The catheter sheath housing and the catheter sheath cap are connected and axially movable relative to each other. The seal and the opening adjustment mechanism are connected and disposed within the catheter sheath housing. The opening adjustment mechanism includes a first positioning plate and a mounting cylinder. The seal is fixedly connected to the first positioning plate and then installed within the mounting cylinder. The seal includes an axially extending spiral flow channel. The distal end of the seal is fixed to the mounting cylinder, and the proximal end is fixedly connected to the first positioning plate. Multiple first positioning pins are distributed on the outer periphery of the first positioning plate, and multiple spiral sliding guide grooves are formed at the proximal end of the mounting cylinder. The axial movement of the catheter sheath cap allows the first positioning pins of the first positioning plate to slide along the sliding guide grooves of the mounting cylinder, compressing and rotating or releasing and rotating the seal to adjust the opening size of the spiral flow channel of the seal.

The present application relates to the field of thrombolytic catheter, in particular, to a kind of indwelling type blood-passable thrombolytic catheter, including catheter, the inside of the pipe wall of the catheter is provided with medicine cavity, the catheter is provided with medicine spraying hole being communicated with the medicine cavity, the catheter is equipped with air bag, the air bag is equipped with at least two, the air bag is spaced apart, the medicine spraying hole is located between the adjacent two air bags, the catheter is connected with the medicine delivery tube for sending medicine to the inside of the medicine cavity, the air bag is connected with air pipe, further including sheath tube, one end of the sheath tube is connected with hemostasis valve, the other end of the sheath tube is an opening;The present application aims at overcoming the deficiencies of prior art and providing a kind of indwelling type blood-passable thrombolytic catheter, when local thrombolysis is carried out to blood vessel again, it does not affect the blood transport inside blood vessel, avoid the necrosis of the inner wall cells of blood vessel due to hypoxia.

An introducer for insertion of a medical device into a patient's vasculature includes an elongate introducer body, a hub, and a hemostatic valve. The elongate introducer body includes a longitudinal axis, a proximal region, a distal region, and an inner lumen. The hub is coupled to the proximal region of the introducer body. The hemostatic valve is disposed within the hub and forms a liquid-tight seal across the inner lumen. The introducer includes a guide configured to guide an object towards the center of the valve during insertion of the object.

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 present invention aims to provide a hemostatic valve that enables reliable hemostasis with a simple mechanism and easy operation in procedures using medical devices such as catheters. [Solution] A hemostatic valve for medical use, comprising a body that can be fitted into a cylindrical hub, wherein the body has at least one cylindrical portion penetrating along the longitudinal axis of the body, and a notch penetrating along the longitudinal axis of the body between at least one of the cylindrical portions and the outer edge of the body.

The utility model relates to a double-cavity perfusion catheter which comprises a catheter body, a catheter seat, an end cap, an outer tube and an inner tube, the inner tube is arranged in the outer tube in a penetrating mode, an inner cavity channel is formed in the inner tube, an outer cavity channel is formed between the inner tube and the outer tube, a first hole is formed in the surface of the outer tube, the first hole is communicated with the outer cavity channel, and a second hole is formed in the near end of the inner tube. The second hole is communicated with the outer cavity channel and the inner cavity channel; the catheter seat is connected to the near end of the catheter main body, and the catheter seat is provided with connecting ports which are respectively communicated with the inner cavity and the outer cavity; the end cap can only plug the connecting port, or plug the connecting port and the second hole at the same time. By means of the design of the end cap, compared with a conventional perfusion catheter, a hemostasis valve, a blocking guide wire and other components are omitted, surgical operation is simpler and more convenient, burdens are relieved for doctors and patients, and the diversified requirements of clinical use are met; meanwhile, the whole structure of the double-cavity catheter is simple, and the production cost can be reduced.

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 braided layer for improved deflection characteristics and ring electrodes for electrical sensing, mapping and visualization, wherein lead wires for the ring electrodes are passed through lumened tubing position under the braided layer in a proximal portion of the guiding sheath shaft and above the braided layer in a distal portion of the guiding sheath shaft. Moreover, the hemostatic valve includes an improved friction ring with air vents to reduce the risk of air being introduced into the valve.

Hemostasis valves and methods for making and using hemostasis valves are disclosed. An example hemostasis valve may include a body having a proximal end region. A core barrel may be at least partially disposed within the proximal region. The cartridge includes a sealing member. The cartridge may have a proximal member and a distal member, and may define a seal retention region. The sealing member may have an axial thickness of about 0.04 to about 0.2 inches. The sealing member may be secured within the seal retention region by mechanical bonding.