83 results about "Hemostatic Valve" patented technology

A hemostatic valve couples to a sheath proximal hub having an inside and an outside surface. The hemostatic valve has a valve body having a proximal porting and end, and a distal portion and end. A passageway extends longitudinally through the valve body between the proximal and distal ends. A sealing element is positioned within the passageway. The distal portion of the valve body includes a pair of contact surfaces forming an annular gap receiving the sheath proximal hub of the sheath so that the contact surfaces sandwich the sheath proximal hub forming a seal on both the inside and outside surfaces of the hub. The valve body and the sheath proximal hub includes two oppositely placed longitudinal lines of fissure that allow the hub to be separated into two halves with the valve body.

An iris-type valve assembly for controlling a flow of fluid. The assembly comprises a base member, a rotatable member, and an elongated elastomeric valve sheath. The distal end of the valve sheath is secured to the base member and the proximal end of the valve sheath is secured to the rotatable member. At least one of the valve sheath ends includes a flange that is secured to a valve-receiving surface of the base member or the rotatable member. The base member and the rotatable member are aligned to define an elongated passageway therethrough for passage of an interventional device, and the elastomeric valve sheath is disposed along the passageway and has a longitudinal opening therethrough for passage of the interventional device. Upon rotation of the rotatable member relative to the base member the longitudinal opening of the valve sheath is selectively constrictable to comprise a seal around the interventional device. The assembly may be provided with ratcheting members to inhibit recoil of the rotatable member, and rib members along the inner surface of the valve sheath to enhance the seal provided by the assembly.

A vascular introducer includes a proximal hub portion with an interior bore, an elongated sheath extending distally from the hub portion, with a lumen in communication with the interior bore of the hub portion, and a hemostatic valve disposed within the bore of the hub portion. The hemostatic valve has a passage extending therethrough, and includes a sealing flap movable between an open position relative to the passage and a closed position relative to the passage.

An indwelling catheter set is provided with a catheter, a cover connected with a proximal end of the catheter and a connector having a hemostatic valve housed therein. The connector is fixed to the cover. A hollow needle for transfusion to a patient is slidably fitted to an inside of the catheter.

A percutaneous luminal access system comprises a thin-walled, collapsible sheath, an introducer, a hemostatic valve, and an access catheter. An introducer may comprise either a pusher tube or an elongate member, or where the introducer is used to axially advance the sheath into a blood vessel or other target lumen. A hemostatic valve may be connected to a proximal end of the sheath, and the access catheter introduced through the hemostatic valve. Pressurized fluid may also be introduced through the hemostatic valve and delivered through a flow region around the catheter within the sheath and optionally through the catheter to the target luminal site.

An introducer and hemostatic valve for improved torsional guidance and kink resistance includes an entirely circumferentially reinforced introducer connected directly to a valve body formed of a plurality of separable portions and housing a valve element in a central chamber thereof. The plurality of portions may be attached to the introducer during formation of the introducer, the valve body, or both. Alternatively, the plurality of portions may be attached to the introducer by assembly of the portions together in a surrounding relation to the introducer. In use, the plurality of portions are separated from each other and the introducer is cut along its length in order to withdraw the introducer and hemostatic valve over an enlarged proximal end of an access device as the introducer is pulled from the patient's body.

A modular hemostatic valve includes a splittable valve body. The splittable body defines a passageway. A sealing element positions in the passageway. The sealing element is configured to facilitate the passage of a first medical device, and the splittable valve body is configured to engage a second medical device.

A separable hemostatic valve comprises a separable valve housing, a separable compressible valve in which an aperture is defined disposed in the valve housing, a means for varying the diameter of the aperture and/or compression of the valve around the aperture, and a means for separating the valve housing and valve into at least two parts. The means for varying the diameter of the aperture and/or compression of the valve comprises means for radially, laterally or longitudinally compressing the valve. The means for separating the valve housing and valve into at least two parts comprising means for slicing, splitting, peeling, tearing, parting or opening the valve housing and/or valve into parts.

Introducer sheath for use in inserting a balloon catheter into a patient's vasculature includes a tubular member having an inner diameter, an outer diameter, a proximal end, a distal end, and a length therebetween, the inner diameter being sized to receive a catheter shaft having an attached expandable member in a deflated condition. The inner diameter can be varied from a first inner diameter at the proximal end and a second inner diameter at the distal end, the first inner diameter being greater than the second inner diameter. A method of inserting a balloon catheter into the vasculature of a patient is also disclosed. Additionally, a balloon catheter kit including a catheter and an introducer sheath is disclosed.

A venous polytetrafluoroethylene (PTFE) graft with integral access port system. The graft may have one, two, or more ports, which then exits the skin. The prosthesis may be made of fluoropolymer tubing fabricated in such a way as to involve several performance features. The graft may have holes for suturing, anchoring, or bio-integration to the artery. The ports have natural acting restrictions or valves at the graft juncture, throughout the implanted part body of the device and at the exit site. The ports are also naturally self-purging. A port may also incorporate a redundant hermetic hemostatic valve and closure system at the exit site.

An introducer sheath includes a elongated sheath configured to be inserted into a blood vessel. The elongated sheath includes a central lumen configured to allow a surgical implement or medical device to pass therethrough. The introducer sheath also includes a hemostatic valve operatively connected to the sheath. The hemostatic valve is configured to prevent blood in the blood vessel from exiting the introducer sheath assembly when the elongated sheath is located in the blood vessel. The hemostatic valve includes a plurality of seals supported by a housing, including a front seal configured to provide a hemostatic seal with a guide wire, and a rear seal configured to provide a hemostatic seal with a range of sizes of implements and devices. The housing is configured to provide strain recovery for strain induced by displacement forces generated during movement of the implement or medical device through the plurality of seals.

A method for treating a uterine fibroid comprises forming an incision in a vaginal fornix to expose a first blood vessel supplying the fibroid, forming an opening in the first blood vessel and inserting an introducer into the first blood vessel via the opening in combination with the steps of advancing a catheter to a desired position within the first blood vessel via the introducer and introducing an occlusive agent into the first blood vessel through the catheter to block blood flow through the first blood vessel. A device for treating uterine fibroids comprises an elongated sheath sized for insertion into uterine arteries via an incision in the vaginal fornix, the sheath including a sheath lumen extending from a first sheath opening formed in a proximal end of the sheath to a second sheath opening formed in a distal end of the sheath and a body a distal end of which is connected to the proximal end of the sheath, the body including a body lumen extending therethrough from a first body opening at a proximal end of the body and a second body opening at the distal end thereof, the second body lumen communicating with the sheath lumen in combination with a hemostatic valve controlling the flow of blood through the body lumen.

An introducer used for access to the coronary sinus from the right subclavian vein has a body and a distal tip, a hemostatic valve, a side arm and a side arm valve coupled to the hemostatic valve. The body is coupled to valve. The introducer comprises at least one straight proximal section; and at least two curved sections with opposite curvature. The straight and curved sections collectively have a length and shape to dispose the distal tip at or near the coronary sinus when accessed from the right subclavian vein. The introducer may further comprise a straight section between the two curved sections. In another set of embodiments the proximal straight and curved sections lie in a common plane. In still another set of embodiments the curved sections lie in planes which are angularly oriented with respect to each other so that the introducer is three-dimensional.

A sheath introducer system with exchangeable hemostatic valve modules is disclosed. A first valve module includes a single entry port to ensure hemostasis during the introduction of an interventional device, such as a main graft delivery system for treatment of an abdominal aortic aneurysm (AAA). A second valve module includes multiple entry ports to ensure hemostasis during the simultaneous introduction and manipulation of multiple interventional devices, such as multiple guiding catheters for use in delivering various intravascular graft components for completion of branch perfusion, for instance, during treatment of the AAA.

The invention discloses a valve-adjustable catheter sheath. The valve-adjustable catheter sheath mainly consists of a sheath tube and a dilator, wherein a fastener, a first hemostatic valve, a second hemostatic valve and a gland cap are arranged at a near-end connector of the sheath tube; through slot matching of the fastener and the gland cap, the compression amount of the second hemostatic valve is controlled so as to change the size of an opening and achieve good sealing and pushing performance; the hemostatic valve adopts a double-sheet structure, when a catheter or an instrument passes through, a second hemostatic valve ensures hemostatic performance, and the catheter or the instrument withdraws, the first hemostatic valve ensures that blood does not lose; the matching of the gland cap and the fastener can control the size of the opening of the second hemostatic valve, so that when the catheters or the instruments with different pipe diameter specifications pass through, good sealing performance can be ensured, the resistance is very small, and very good operating hand feel is ensured; the first hemostatic valve and the second hemostatic valve are made of materials with different hardness and elasticity; the first hemostatic valve has relatively large elasticity modulus, the second hemostatic valve is relatively soft, and the size of the opening of the second hemostatic valve can be effectively controlled in a compressed state.

A hemostasis valve for a vascular introducer includes a valve body having a seal region with opposed substantially planar proximal and distal end surfaces and a central axis extending through the seal region perpendicular to the proximal and distal end surfaces. The seal region has a first grouping of circumferentially arranged and equidistantly spaced linear cuts extending radially outward from the central axis, and through the seal region from the proximal end surface to the distal end surface. The seal region has a second grouping of circumferentially arranged and equidistantly spaced linear cuts in the distal end surface extending tangentially outward from the first grouping of linear cuts, and partially from the distal end surface to a depth short of the proximal end surface to facilitate passage of a variety of sizes of medical devices through the seal region.

An expandable sheath assembly includes a support body extending from a proximal end to a distal end. A guide rod is interconnected to the support body and extends between the ends along an axis. A dilator extends from the guide rod for insertion into a body vessel, and a hub is releasable connected to the distal end of the support body. A distal sheath overlays the dilator, and a hemostatic valve is slidably disposed along the axis. A proximal sheath extends from the hemostatic valve and is disposed in surrounding and coaxial relationship with the guide rod. The proximal sheath is concurrently slidable with the hemostatic valve along axis to advance the proximal sheath through the hub and interleave the proximal sheath between the dilator and the distal sheath for lifting the distal sheath from the dilator and effectuating an expansion of the body vessel.