128 results about "Introducer sheath" patented technology

An introducer can include an introducer needle and an introducer sheath having a transition therebetween that eases tissue over a distal end of the introducer sheath without catching tissue thereon tissue despite an excised portion of the introducer needle. The introducer needle can include a needle shaft having a longitudinal needle slot extending from a proximal portion of the needle shaft through a distal needle tip, which results in an excised portion of a heel of a bevel of the needle tip. The introducer sheath can include a sheath body and a tapered sheath tip. The sheath body can be over the needle shaft sealing the needle slot thereunder but for a sheath-body opening in a proximal portion of the sheath body for an access guidewire. The introducer can include the transition from the bevel of the needle tip to at least the taper of the sheath tip.

An introducer sheath is described. The introducer sheath may include a tubular body. The tubular body may extend from a distal end toward a proximal end. The tubular body may include a lumen. The lumen may at least partially be defined by a wall. A channel may be disposed within the wall. The channel may be configured to receive a guidewire. The tubular body may include an expandable portion expandable to increase a cross-sectional area of the lumen.

An introducer can include an introducer needle (134) and an introducer sheath (136) having a transition therebetween that eases tissue over a distal end of the introducer sheath without catching tissue thereon tissue despite an excised portion of the introducer needle. The introducer needle can include a needle shaft (140) having a longitudinal needle slot (146) extending from a proximal portion of the needle shaft through a distal needle tip (144), which results in an excised portion of a heel of a bevel (150) of the needle tip. The introducer sheath can include a sheath body (162) and a tapered sheath tip (170). The sheath body can be over the needle shaft sealing the needle slot thereunder but for a sheath-body opening (166) in a proximal portion of the sheath body for an access guidewire.

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.

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.

An introducer sheath may include a valve hub and an elongate shaft extending from the valve hub. The valve hub may include a proximal end defining a first port having a first port entry opening and a second port having a second port entry opening. The introduce sheath may include a first seal disposed at the first port and aligned with the first port entry opening and a second seal disposed at the second port and aligned with the second port entry opening. The first port may be parallel with the second port. The valve hub may couple with a stabilizer configured to couple with and axially fix a medical device extending through one or both of the first port and the second port.

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.

An access system for accessing a patient's vasculature includes an introducer sheath that is adapted to extend into an interior of a blood vessel through an opening formed in a wall of the blood vessel in order to provide access to the interior of the blood vessel. A deployable graft is disposed relative to the distal region of the introducer sheath. One or more positioning elements are releasably secured to the deployable graft and extend proximally therefrom such that exerting a force on the one or more positioning elements causes the deployable graft to move proximally within the interior of the blood vessel to a position in which the deployable graft spans the opening formed in the wall of the blood vessel. An outer jacket releasably secures the deployable graft in position relative to the introducer sheath.

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

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.

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

A delivery system and method are described that include an access introducer sheath and a delivery catheter. The access introducer sheath defines a channel through a body thereof from a proximal end to a distal end. The delivery catheter is disposed within the channel of the access introducer sheath, and defines a lumen that extends along a central axis of the delivery catheter. A distal end segment of the delivery catheter projects beyond the distal end of the access introducer sheath. The lumen is configured to receive a dilator therein that projects beyond the distal end of the delivery catheter so that the distal end segment of the delivery catheter is disposed between a tip segment of the dilator and the distal end of the access introducer sheath along the central axis.

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.

A delivery endcap assembly is adapted for use with a biliary access device and is adapted to permit a medical device to be delivered through the biliary access device. The delivery endcap assembly includes a securement portion adapted to be releasably securable to a proximal end of the handle after the one or more removable components have been removed from the handle, a tapered portion extending proximally from the securement portion, a rotation hub adapted to be coupled to the securement portion, a valve adapted to be coupled to the rotation hub and a lumen extending through the delivery endcap assembly, wherein the lumen extending through the delivery endcap assembly is adapted to permit a medical device within an introducer sheath to be advanced through the biliary access device.

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

Embodiments of an expandable sheath can be used in conjunction with a catheter assembly to introduce a prosthetic device, such as a heart valve, into a patient. Such embodiments can minimize trauma to the vessel by allowing for temporary expansion of a portion of the introducer sheath to accommodate the delivery apparatus, followed by a return to the original diameter once the prosthetic device passes through. Some embodiments can include a sheath with inner and outer layers, where a folded portion of the inner layer extends through a slit in the outer layer and a portion of the outer layer overlaps the folded portion of the inner layer. Some embodiments include an elastic outer cover positioned outside the outer layer. Embodiments of the present expandable sheath can avoid the need for multiple insertions for the dilation of the vessel, thus offering advantages over prior art introducer sheaths.

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.