306 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.

An introducer sheath assembly for percutaneously delivering a medical device that maintains hemostasis in a patient. The assembly has a hub, a hub cap and a hemostasis valve. The introducer sheath assembly has a longitudinal axis and a lumen formed therein. The hemostasis valve has a frame portion and a valve portion, the valve portion having a plurality of slits that are offset through the thickness of the valve portion therein and an extension of the frame portion formed from an incompressible material. The extension of the frame portion is received by a valve seat feature in the hub, when the valve is received by the hub. The valve seat feature also receives a seating portion of the hub cap as the hub and hub cap are advanced into engagement, the seating portion of the hub cap advanced into the valve seat feature subjecting the incompressible extension of the frame portion to a compressive force.

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.

The invention discloses a guiding sheath and a sheathing canal assembly, and relates to the technical field of medical instruments, the guiding sheath comprises a sheathing canal main body and an elastic limiting piece, the elastic limiting piece is arranged on the sheathing canal main body and is used for abutting against an insertion part inserted into the sheathing canal main body so as to elastically restrain the insertion part on one side of the inner wall of the sheathing canal main body. The sheath tube main body of the guide sheath can be placed in the body of a patient, the insertion part of the endoscope extends into the sheath tube main body, and the insertion part can be elastically restrained on one side of the inner wall of the sheath tube main body by the elastic limiting piece. For example, after the calculus is broken, a negative pressure environment can be provided in the sheathing canal, so that the calculus is sucked between the inner wall of the sheathing canal main body and the insertion part and is discharged. During the period, the insertion part is elastically restrained on one side of the inner wall by the elastic limiting piece, a large space is reserved for the other side of the inner wall, and the situation that the object to be sucked is blocked is prevented. During the period, the elastic limiting piece with elasticity can deform so as to adapt to the insertion parts of different specifications and play a limiting role on the insertion parts.

The invention discloses a guiding sheath and a sheath tube assembly, and relates to the field of medical instruments.The guiding sheath comprises a sheath tube body and a telescopic assembly, the sheath tube body is provided with a containing cavity, the telescopic assembly is provided with a first end and a second end which are relatively far away, the first end is connected with the sheath tube body and communicates with the containing cavity, and the second end is arranged in a sealed mode; and the sheath tube is telescopically arranged relative to the sheath tube main body. The sheath body is inserted into a doctor-patient body, such as a doctor-patient kidney. The insertion part of the endoscope is inserted into the containing cavity and moves into the telescopic assembly till the endoscope abuts against the second end. The medical staff can continue to push the insertion part to move, and the insertion part drives the telescopic assembly so that the telescopic assembly can stretch out of the sheathing canal body. The insertion part can also extend out of the sheath tube body along with the telescopic assembly, and the sheath tube body is prevented from affecting the field angle of the camera module of the insertion part. The insertion part independently extends out of the sheath tube main body, and the size of the insertion part is smaller than that of the sheath tube main body, so that the insertion part can enter a narrower area, and the use effect of the guide sheath is improved.

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.

Some embodiments are directed to a catheter system comprising an introducer having a main body, an introducer sheath projecting from the main body, and a first seal supported within the introducer and a catheter having a main body, an outer sheath projecting from the main body, a second seal supported within the catheter, and an inner core configured to be advanced axially through the main body, the second seal, and the outer sheath. The introducer can be configured to be selectively engageable with the catheter so that the catheter can be selectively and removably linked with the introducer in the axial direction. The catheter system can also be configured such that, when the introducer and the catheter are linked, the catheter can be rotatable relative to the introducer. The introducer can be configured to radially restrain an endoluminal prosthesis.

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.

Neurovascular flow diverter and delivery systems, and methods of using the same are described herein. The systems can include a customizing member including 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 customizing member includes a tubing extending along and around a distal portion of the introducer sheath. This tubing is cuttable and contains a distal end of the flow diverter. The length of the flow diverter can be customized by cutting through the tubing and the therein contained flow diverter.

The present invention discloses an introducer system comprising an introducer sheath, a valve assembly, and a medical device passage. The valve assembly includes a flexible material with an inner surface exposed along a portion of the medical device passage and an outer surface defining a valve membrane chamber. Additionally, a compliance chamber within the valve assembly is in communication with the valve membrane chamber and houses a piston assembly movable between positions to accommodate inflation media.

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.

The invention discloses a catheter sheath for cardiac surgery and a using method thereof.The catheter sheath for cardiac surgery is used for feeding in a cardiac surgery electrode wire and is provided with a catheter sheath assembly, the catheter sheath assembly is formed by combining two symmetrically-arranged catheter bases, and the catheter sheath is connected to the lower portion of the spliced catheter base assembly. The catheter sheath assembly, the fixing assembly and the expansion tube are installed, sealing is achieved when the catheter sheath assembly is inserted into a patient body through cooperation of the catheter sheath assembly and the expansion tube, blood is prevented from flowing out, and meanwhile the two separated catheter sheaths abut against the lower closing valves on the outer sides respectively when the catheter sheaths are stripped through the fixing assembly; the position of the opening is limited, the abutting position is the connecting position of the two lower closing flaps, the lower closing flaps cannot be expanded, in this way, the catheter sheath can be withdrawn conveniently, the situation that the expansion tube rebounds is avoided, it is guaranteed that insertion of the catheter sheath cannot be affected when the connecting rod is installed through the damping mechanism, and operation is convenient and fast.

The present disclosure illustrates an introducer sheath with a partially annealed metal frame. The introducer sheaths described herein include a hub coupled to a shaft. The shaft comprises a braided wire frame with (i) an annealed distal portion that prevents the braided wire frame from unraveling at a distal end, and (ii) a second portion that is unannealed; a jacket encompassing the braided wire frame; and a liner forming an inner wall.

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.