94 results about "Introducer sheath" patented technology

Neurovascular flow diverter and delivery systems, and methods of using the same are disclosed herein. The systems can include an introducer sheath, a catheter, a deployable flow diverter that can be contained in the introducer sheath or in the catheter, a core wire, and one or several deployment features coupled to the core wire and engaging the flow diverter. The deployment features can include one or more of a pusher, one or several friction bumps, one or several deployment coils, a claw mechanism, a self-expanding element, a supporting coil, a tip coil, and / or an atraumatic tip. One or more of the deployment features can be radiopaque.

An introducer assembly includes a valve having a first end and an opposite second end; a sheath fixedly secured to and extending axially from one of the first and second ends of the valve; a dilator extending through the valve and sheath; and a lock knob rotatable between locked and unlocked positions to releasably axially lock the tool relative to the sheath without causing corresponding rotation of the tool therewith.

Sheath assembly for the insertion of a cord-shaped element, comprising an introducer sheath, and an auxiliary sheath for insertion into the introducer sheath together with the cord-shaped element. In some examples, the auxiliary sheath has a housing configured to detachably couple to the introducer sheath housing, and to detachably fasten the cord-shaped element with respect to the auxiliary sheath housing.

The present technology provides systems, devices, and methods for forming blebs to treat ocular hypertension or glaucoma. In some embodiments, a minimally invasive bleb formation device comprises an introducer sheath having a lumen extending longitudinally therethrough. The lumen has a distal end aperture insertable adjacent to a target tissue. The device further includes a wire positionable within the lumen of the introducer sheath. The wire has a first end portion, a second end portion, and an intermediate region between the first end portion and the second end portion. At least a segment of the intermediate portion is configured to extend through the distal end aperture to form a wire loop. The wire loop is moveable between a plurality of positions and is configured to disrupt and cauterize the target tissue.

Abstract A blood pump assembly includes an introducer sheath with a proximal end and a distal end, a pump body which extends within the introducer sheath, and a catheter that interfaces with the pump body and extends proximally though the introducer sheath. In a rest state, the introducer sheath forms an oval cross-section sized to encompass the catheter and a medical device. In a constrained state when the pump body is within the introducer sheath, the cross- section of the introducer sheath is circular. The malleability of the introducer sheath allows larger medical devices to be passed through the introducer sheath, while still allowing other devices to be inserted through the introducer sheath after the pump has been guided through. A perimeter of oval cross­section of the introducer sheath is equal to the perimeter of the circular cross-section of the introducer sheath. Abstract circular cross-section of the introducer sheath. 20 26 20 47 20 18 J un 2 02 6 A b s t r a c t 2 0 2 6 2 0 4 7 2 0 1 8 J u n 2 0 2 6

In some examples, an introducer sheath (400) extends from a proximal end (402) to a distal end (404), and includes a hub (405) disposed at the proximal end, and a body (410) coupled to the hub and ext

This allows for the insertion of multiple medical devices into the patient's vascular system via a single access point through an introducer sheath. [Solution] The intravascular system includes an introducer sheath 104 having a lumen of fixed diameter, a first medical device 102, and a catheter 106 having a proximal end and a distal end coupled to the first medical device. When the catheter is placed within the introducer sheath, an annular gap is formed between the outer circumference of the catheter and the inner circumference of the lumen. The catheter is configured to take on different dimensional forms such that the size of the catheter and the annular gap are variable.

An introducer system includes an introducer sheath, a valve assembly, and a medical device channel. The valve assembly includes a flexible material having an inner surface exposed along a portion of the medical device channel, and an outer surface defining a valvular cavity. Further, a compliant cavity within the valve assembly communicates with the valve membrane cavity and accommodates a piston assembly movable between a plurality of positions to accommodate a fill medium.

The invention provides a bendable guide sheath with a temperature and pressure monitoring function and a preparation method of the bendable guide sheath. The near end of the sheathing canal is connected with the handle joint, and the sheathing canal comprises a sheathing canal end part and a sheathing canal head part which are sequentially distributed from the near end to the far end; the head of the sheath tube is of a bendable structure; the temperature and pressure monitoring module comprises a temperature and pressure monitoring sensor, the temperature and pressure monitoring sensor is embedded in the tube wall of the head of the sheath tube, and the outer wall of the head of the sheath tube does not cover the surface of the temperature and pressure monitoring sensor. According to the technical scheme, the measured pressure and temperature are more accurate, the installation process of the sensor is simplified, a channel of the sheath tube does not need to be occupied, and the size of the guide sheath can be made smaller; besides, the head of the sheathing canal can be bent, so that the front end of the sheathing canal can be bent along with the bending of the flexible lens and can reach certain parts which can be entered by bending, the situation that other instruments are needed to be used for removing stones is avoided, and the pain and the economic burden of a patient are relieved.

Provided herein is a catheter having a varying outer diameter to be used with a percutaneous blood pump and method of use. The system may comprise a catheter having at least two portions, each portion having a different outer diameter. The system may further comprise an introducer sheath. The portion of the catheter having the smaller outer diameter may pass through the introducer sheath. Further, a plurality of catheters having varying outer diameters may pass through a singular introducer sheath. The method may comprise advancing a catheter until the portion having the smaller outer diameter is through the introducer sheath and then inserting a second catheter through the same introducer sheath.

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 locking mechanism for a transcatheter delivery system is disclosed. As one example, the locking mechanism may comprise a first fixing member configured to be coupled to an introducer sheath, a second fixing member configured to be coupled to a handle of a delivery apparatus, and a locking arm configured to be removably coupled at a first end to one of the first fixing member and the second fixing member and fixedly or removably coupled at a second end to another one of the first fixing member and the second fixing member, wherein the locking arm is moveable between a first position where an axial position of the second fixing member is not fixed relative to the first fixing member via the locking arm and a second position where the axial position of the second fixing member is fixed relative to the first fixing member via the locking arm.

A sheath assembly (100) is provided that includes an expandable introducer sheath (130), and a dilator assembly (200). The sheath assembly (100) includes an expandable sheath (130) having a stepped feature (360) within a distal opening thereof; a dilator assembly (200) includes a dilator having a dilator body (210); and an interlocking device (240) including a catch surface (244) configured to engage with the stepped feature of the expandable sheath. When the stepped feature engages the catch surface, it prevents further relative movement such that the body of the dilator is prevented from exiting the distal end of the expandable sheath. The nature of interlocking engagement between the stepped feature and the catch surface allows the dilator to extend and maintain tension on the expandable sheath during insertion into a patient and then retract from the expandable sheath by simply pulling the dilator in an opposite direction. The dilator assembly (200) also includes a dilator hub (230) having a spring mechanism (270) configured to achieve and maintain a desired tension on the expandable sheath and to prevent over-extension of the expandable sheath when a dilator (210) is inserted into the expandable sheath.

The invention provides a bendable locking guide sheath which comprises a sheath tube, a handle, a sliding part, a traction rope, a first locking mechanism and a second locking mechanism, the handle is arranged at the near end of the sheath tube, a sliding way is formed in the handle, and a plurality of tooth grooves are formed in the outer wall of the handle; the sliding piece is arranged on the handle in a sliding mode, the sliding piece is provided with a sliding block, and the sliding block penetrates through the sliding way and extends into the handle; the traction rope is connected between the sliding block and the far end of the sheathing canal; the first locking mechanism comprises a pressing piece and a first elastic piece, the pressing piece is rotationally arranged on the sliding piece, the pressing piece is provided with a locking end and a pressing end, and the locking end is selectively clamped into the tooth groove under the action of the first elastic piece; the second locking mechanism comprises a driving buckle and a driven buckle, the driving buckle is arranged on the pressing piece, and the driven buckle is arranged on the sliding piece; the second locking mechanism is configured in the mode that when the locking end is clamped into the tooth groove, the driving buckle and the driven buckle are clamped, and one-hand operation is achieved.

An introducer sheath and associated methods are disclosed herein. An example introducer sheath may include an elongate shaft having a proximal end, a distal end and a lumen extending therebetween. The elongate shaft may further include a retractably expandable section disposed between the proximal end and the distal end, the retractably expandable section may include one or more layers. At least a portion of the retractably expandable section may include a cut pattern formed in the one or more layers. The retractably expandable section may accept passage of a device through the lumen along the retractably expandable section and transition from a radially collapsed configuration before passage of the device through the retractably expandable section, to a radially expanded configuration during passage of the device through the retractably expandable section, and to a radially retracted configuration after passage of the device therethrough.

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.

Aspects of the expandable sheath can be used in conjunction with a catheter assembly to introduce a prosthetic device, such as a heart valve, into a patient.SOLUTION: Such aspects can minimize trauma to the vessel by allowing temporary expansion of a portion of the introducer sheath to accommodate the delivery apparatus and then return to its original diameter once the prosthetic device has passed. Some aspects can include a sheath comprising an inner layer and an outer layer having at least one folded portion of the inner liner. Some aspects include an inner liner having an etched portion, an un-etched portion, and an otherwise surface modified portion. The expandable sheath aspect of the present invention can avoid the need for multiple insertions to enlarge the vessel, thus providing an advantage over conventional introducer sheaths.SELECTED DRAWING: Figure 1

To provide an intraluminal introducer sheath and a method for forming the same. [Solution] The introducer sheath includes a first polymer layer, a second polymer layer, and at least two longitudinal support elements positioned between the first and second polymer layers. The longitudinal support elements are configured to provide columnar strength to facilitate the advance of the intraluminal introducer sheath into the blood vessel without substantial longitudinal compression.

To provide a valve structure and an introducer sheath that can exhibit high sealing performance and excellent operability. [Solution] The valve structure 120 includes a valve body 130 having a flexible porous member with an insertion portion 135 through which other medical instruments 300A, 300B can be inserted, a housing 140 made of a material harder than the valve body, and a film-like sealing portion 150 arranged to cover at least a part of the surface of the valve body. The valve body is positioned in the housing so as to divide the lumen 145 of the housing into a proximal region 145A located on the proximal side of the valve body and a distal region 145B located on the distal side of the valve body, and at least a part of the sealing portion is positioned on the inner circumferential surface of the valve body facing the insertion portion.

An ablation system and methods comprising a catheter having an expandable basket and a shaft assembly comprising an outer and inner elongated shaft allowing relative longitudinal movement. The expandable basket comprises filaments braided into a braided mesh including electrodes for ablation, mapping and measurement. An expandable basket at the distal end of the catheter is coupled to both shafts and is deployable from a collapsed to an expanded configuration. The system includes an introducer sheath with a highly abrasion-resistant inner liner designed for smooth catheter deployment. An electrical control circuits regulates the delivery of high-voltage pulses from a pulse generator to the target tissue, enhancing the safety, precision and effectiveness of tissue ablation.

An introducer sheath (10) comprising a sheath member (12), a first hub (14), and a second hub (16), the sheath member comprising an inner portion (22) defining an internal lumen (21) through which an intraluminal device can be moved, and an outer portion (24) surrounding at least a portion of the inner portion; the first hub coupled to the inner portion of the sheath member; the second hub coupled to the outer portion of the sheath member. A portion of the length of the sheath member positioned on the outer portion transitions from the outer portion to the inner portion when the first hub is actuated away from the second hub.

To provide a valve structure and an introducer sheath that can exhibit high sealing performance and excellent operability. [Solution] The valve structure 120 includes a housing 130 having a lumen 135 and a housing portion 137 communicating with the lumen, and a valve body 140 disposed in the lumen of the housing and having an insertion portion 145 through which other medical instruments 300 can be inserted. The housing includes a wall structure having a housing portion that accommodates a part of the valve body when another medical instrument is inserted into the insertion portion of the valve body and the valve body deforms.

Disclosed herein are introducer sheaths and loaders (300). The loader (300) aids in advancement of a delivery device into the sheath and is both flushable and includes a removable loader tube (312).

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 specification relates to a medical introducer sheath extending in an axial direction between a distal end and a proximal end, and having an axial lumen and a bendable portion extending to the distal end, the bendable portion comprising: an ultrasound imaging probe comprising a number of ultrasound transducers distributed in a matrix form on a transverse face of the medical introducer sheath at the distal end around the axial lumen; a directional coupling adapted to apply a certain curvature to the bendable portion; a sleeve disposed around the directional coupling and comprising a tubular portion and a protruding peripheral portion, the peripheral portion being wrapped in the axial direction around the tubular portion with a number of protruding turns; and, a connecting strip extending in the axial direction from the ultrasound transducers towards the proximal end and distributed around the sleeve; and an elastic structure wrapped in a number of turns around the sleeve and the connecting strip, the elastic structure travelling between the protruding turns.

The invention relates to a valve used in medical procedures. More specifically the invention relates to an introducer sheath valve used in minimally invasive and conventional surgical procedures. The valve may accommodate a wide range of surgical implement diameters, shapes, and multiple implements without imposing the high frictional forces of known valves.

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.

Valve delivery catheter assemblies including components that limit trauma to the expanded prosthetic valve and body channels as the distal tip of the catheter is withdrawn through the expanded valve and thereafter from the body. Catheter assemblies according to the present invention can include a handle assembly, an introducer sheath, and a distal tip assembly. The handle assembly can include a fixed main handle and two or more rotating handles that allow a user to control the distal tip assembly of the catheter. A safety button can be included on the handle assembly to allow for precise and consistent positioning of the prosthetic valve in the body. A valve retaining mechanism can be included to assist in retaining the prosthetic valve prior to deployment.

A valve assembly comprises an outer tube, an inner tube arranged at least partially within the outer tube to define a pressurizable space therebetween, the inner tube extending along a longitudinal axis between a first end and a second end and formed of a drapeable material, the inner tube having a center portion intermediate the first end and the second end, a first end ring positioned adjacent the first end, the first end ring including a plurality of axially adjacent portions, the plurality of axially adjacent portions comprising a first portion formed of a first material, and a second portion positioned axially adjacent the first portion and formed of a second material.

Disclosed herein are systems and methods for setting a length of sheath used in an introducer sheath system to deploy a medical device. The capacity to adjust the length of the sheath facilitates reducing a portion of the sheath that remains outside of the patient during medical procedures, wherein a distance between an incision site and a treatment site is less than an initial length of the sheath.