203 results about "Introducer sheath" patented technology

An introducer assembly includes an elongate sheath sized for insertion into a blood vessel of a patient and a hub. The hub can be coupled to a proximal portion of the sheath and can include a first hub portion and a second hub portion. The hub can include various features to facilitate breaking apart or separating the introducer assembly from a patient. For example, the first hub portion can have a first notch which can facilitate breaking, splitting, or fracturing the hub. The second hub portion can partially surround the first hub portion and can include two wings and an opening disposed above the first notch. The first hub portion can be formed from a first material and second hub portion can be formed from a second material. In some embodiments, the second material can be stiffer than the first material to facilitate fracturing the hub.

The present disclosure is directed generally to introducer sheaths used in endoluminal catheterization for medical treatments. More particularly, the present disclosure is directed towards introducer sheaths that are expandable and tools for cutting them open.

An introducer sheath for providing access in a patient's body comprises a tubular body with a distal portion and a proximal portion, the proximal portion being configured to be inserted into the patient's body to allow a medical device to be inserted through the introducer sheath into the patient's body. In order for the introducer sheath to be removable from the patient, it can be separated along its length in a longitudinal direction. The introducer sheath further comprises at least a first handle which is pivotable about a fulcrum. The first handle has a first end portion and a free second end portion so as to form a lever, such that pivoting the handle about the fulcrum causes a contacting portion of the handle to act on a respective counter portion that is operatively connected to the distal portion of the tubular body. This creates a breaking force that causes the distal portion of the tubular body to break.

The invention discloses an insertion part, an endoscope and a negative pressure suction assembly, and relates to the technical field of medical instruments, the insertion part comprises a first section and a second section, the first section is provided with a front end assembly, and the first section is further provided with a first channel. The insertion part can be inserted into the sheath tube, and a fluid cavity channel is formed between the sheath tube and the insertion part. The blocking area of the first section can be matched with the inner wall of the sheathing canal so as to block a fluid cavity channel between the sheathing canal and the insertion part. Negative pressure suction force is formed in the fluid cavity channel through an external suction device and the like. As the blocking area blocks the fluid cavity channel, the negative pressure suction force can be transmitted to the first opening or the second opening and then extends to the position near the far end of the insertion part through the first channel. Negative pressure suction force in the sheath tube can be transmitted to the distal end of the negative pressure suction fitting to extend the suction range of the introducer sheath to the distal end of the insertion portion. Therefore, stone fragments in the deep position of the affected part can be sucked out, stone fragment residues are avoided, and the using effect is improved.

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.

Systems and methods are provided for insertion of a medical device into a blood vessel. The system may include a sheath assembly with an introducer sheath and a variable size repositioning sheath. The variable size repositioning sheath may be configured to be adjustable in size in a radial direction and to be inserted into the blood vessel or an expandable introducer sheath. In some aspects, the system may include an intracardiac device such as a blood pump with an elongate catheter.

There is provided an introducer system for percutaneously delivering a first and a second medical device to a patient. The system may comprise an introducer sheath having a longitudinal axis and a lumen formed therein. The system may also comprise a bifurcated hub coupled to a proximal end of the sheath. The hub may comprise a first arm having a first lumen and a first hemostasis valve for the passage of the first medical device. The hub may also comprise a second arm coupled to the first arm and having a second lumen and a second hemostasis valve for the passage of the second medical device. Further, the hub may comprise a connection port such that the first lumen and the second lumen are in communication with the lumen of the introducer sheath for the passage of at least one of the first and second medical devices through the introducer sheath for delivery to the patient.

The disclosure generally related to improved introducer sheaths for insertion into the body to provide intravascular access to various medical devices, involving an introducer sheath capable of insertion while providing resistance to frictional forces which may otherwise cause the unintentional compression of the outermost layer of the sheath. Embodiments generally comprise an introducer sheath comprising a circumferentially continuous elastomeric outer layer and a support element. Systems for protecting a luminal surface of a blood vessel are described herein. Also provided herein are methods for the use of these systems. Further, these systems include an elongated sleeve having a proximal opening and a circumferentially continuous elastomeric outer tube, the circumferentially continuous elastomeric outer tube has a smooth inner surface with a substantially round cross-section and includes one or more support elements extending longitudinally from the distal opening towards the proximal opening.

An expandable introducer sheath with an interlock dilator. The present technology provides an expandable sheath with a step feature inside its distal opening, and a dilator with an interlock that includes a catch surface configured to engage with the step feature and resist further relative movement so that the body of the dilator is prevented from exiting the distal end of the expandable sheath. This interlocking engagement may allow the dilator to be used to extend and maintain tension on the expandable sheath during insertion into a patient, and then to be retracted from the expandable sheath by pulling the dilator in the opposite direction. The present technology also provides a dilator hub with a spring mechanism configured to achieve and maintain a desired tension on the expandable sheath and to prevent overextension of the expandable sheath when the dilator is being inserted into the expandable sheath.

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.

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 cross-section of the introducer sheath is equal to the perimeter of the circular cross-section of the introducer sheath.

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 improved ureteral sheath, includes: an introducer sheath including a sheath tube and a sheath base arranged at a proximal end of the sheath tube, the sheath base is provided with a tube segment in communication with the sheath tube and a connecting part arranged at a distal end of the tube segment; the sheath tube is provided, from a proximal end to a distal end thereof, with a main body segment and a head segment arranged at a distal end of the main body segment, the main body segment is composed of a hard tube segment, and the head segment is composed of a deformable tube segment; and the tube segment extends outwards relative to a central axis thereof in a communication manner to form a negative pressure connecting tube, a tube wall of the negative pressure connecting tube is provided with vent groove.

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 endoluminal punch and introducer sheath are described wherein the endoluminal punch comprises a guidewire lumen through which a user is capable of placing a guidewire. The endoluminal punch system further comprises a mechanism affixed to the hub which is capable of controlling the axial positioning of the guidewire relative to the endoluminal punch distal end. The control mechanism can be released so that the endoluminal punch can be removed from a patient while retaining the guidewire in place within the patient. The endoluminal punch introducer, including a sheath and dilator, can comprise energy emitting electrodes or transducers for cutting larger size holes in stubborn (friable, scarred, or fibrotic) tissue. In other embodiments, the endoluminal punch can comprise a guidewire or stylet, wherein the guidewire or stylet is capable of emitting energy to cut through tissue.

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.

There is provided an introducer system for percutaneously delivering a first and a second medical device to a patient. The system may comprise an introducer sheath having a longitudinal axis and a lumen formed therein. The system may also comprise a hub coupled to a proximal end of the sheath. The hub may comprise a first arm having a first lumen and a first hemostasis valve for the passage of the first medical device. The hub may also comprise a second arm coupled to the first arm and having a second lumen and a second hemostasis valve for the passage of the second medical device. Further, the hub may comprise a connection port such that the first lumen and the second lumen are in communication with the lumen of the introducer sheath for the passage of at least one of the first and second medical devices through the introducer sheath for delivery to the patient.

An endoluminal delivery system including an introducer sheath, a delivery catheter configured to pass through the introducer sheath, an endoluminal device releasably maintained along the delivery catheter at a delivery profile, and a guidewire tube removably received by the endoluminal device, the guidewire tube including an enlarged feature configured to prevent insertion of the guidewire tube into a body of a patient.

An introducer sheath for use in hybrid procedures on the heart includes a shaft having a distal balloon which is inflated inside the heart wall. A proximal collar is slidable along the shaft and locked to anchor the sheath to the wall of the heart. The sheath has markings visible to both the naked eye and under fluoroscopy to aid in judging the depth of insertion.

An expandable introducer sheath (130) with a dilator (610) configured to trap the distal tip (150) of the introducer sheath. In some examples, the dilator may have a tip (620) configured to slide relative to the body of the dilator, such that moving the dilator body in the proximal direction relative to the dilator tip reveals an area in which the outer diameter of the dilator transitions to an area of reduced diameter, and moving the dilator body in the distal direction relative to the dilator tip may enable the distal tip of the introducer sheath to become trapped. Likewise, in some examples, the dilator may be equipped with a collet configured to open and close as the dilator tip slides relative to the body of the dilator.

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.

A system for introducing a delivery apparatus into a patient's vasculature. The system may include a sheath having a lumen and configured to be inserted into the patient's vasculature. An introducer has a channel for receiving a guide wire and is configured to be positioned within the lumen of the sheath. A plug is coupled to the introducer and is configured to move from a first position in which the plug has a first diameter to a second position in which the plug has a second diameter that is greater than the first diameter and greater than the interior diameter of the sheath, the plug being configured to slide within the lumen in a direction from the distal end of the sheath towards the proximal end of the sheath to expand the sheath in the direction radially outward from the lumen.

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.