Apparatus and methods for controlled arterial/venous access are provided. The apparatus and methods may include a lumen anastomosed to a bodily lumen. A lumen clamping means may utilize a clamp manipulator to effectively seal the tubing, and the manipulator may be operated by two fingers. A needle receptor may be utilized, and the receptor may utilize a compressible member to seal tightly against a needle inserted from outside the body, in order ensure secure placement into a channel. The channel may be in liquid communication with the tubing. The manipulator and the needle receptor may be palpable from outside the body.

An elastic percutaneous elastic introducer sheath is disclosed which can locally expand and reduce to accommodate a transcatheter medical device. The elastic introducer sheath includes a non-circumferentially continuous elastic frame, a liner, and a jacket.

An interface device for implantation in a subject includes a tissue integration layer and a crowning element. The tissue integration layer has a porous structure adapted for ingress of tissue to anchor the device when implanted. The crowning element is adapted for epidermal attachment when the device is implanted and is configured such that once implanted, part of the crowning element extends through the epidermis and is accessible from outside the subject's body. The porous structure of the tissue integration layer is interconnected for tissue ingress during implantation.

A flow restriction device may include a distal end configured to couple to a catheter assembly, a proximal end configured to couple to a fluid collection device, and a body extending from the proximal end to the distal end. The body may include an outer surface and an inner surface defining a lumen of the body. The flow restriction device may further include a fluid pathway disposed between the distal end and the proximal end when the outer surface is coupled within a mating luer. The fluid pathway may include a non-linear portion on at least a portion of the outer surface along which a fluid flows from the distal end into the fluid collection device.

The present disclosure provides medical devices, particularly medical grade needles with removable tips, as well as methods of needle tip installation and removal, and devices therefor. Needle tip installation and removal devices may include needle tip installation and removal tools and kits, including hand held and manipulated tools that facilitate the installation and removal of needle tips, particularly on vascular access port needles. Such installation and removal devices may provide more expedient hook up of the access port for the therapy. Also, the installation and removal of the needle tips may be conducted in a more sterile manner.

A surgical instrument access port assembly and method of use, the surgical instrument access port a surgical instrument has a needle lumen and a surgical access port. The needle lumen extends in a longitudinal direction and includes a needle tip at a distal end, and a body portion at a proximal end, the body portion having at least one recess or finger. The surgical access port has a cannula defining a hollow cannula shaft, and a tapered hub attached to a proximal end of the cannula. The tapered hub includes at least one inner ring configured to abut against the at least one recess or finger while the surgical instrument is inserted into the cannula of the surgical access port.

An injection port assembly may comprise a support body having a receptacle associated with a passage through the support body. The receptacle may have at least one recess in an end surface of the receptacle. The receptacle may have a plurality of retainer members. The assembly may further comprise a peripheral rim rib about a periphery of the support body and a number of additional ribs extending from the receptacle to the peripheral rim rib. The assembly may further comprise a delivery assembly coupled within the receptacle via the retainer members. The delivery assembly may have a cannula extending through the passage. The delivery assembly may have an injection receiving volume within the delivery assembly in fluid communication with a lumen of the cannula but otherwise fluidically sealed by a self-sealing barrier. There may be a sole externally accessible portion of the barrier aligned with an axis of the lumen.

An instrument advancement device may include a housing and an extension tube extending through the housing. A wedge may be disposed within the housing. The wedge may include an arc-shaped channel. A pair of opposing pinch members configured to pinch the extension tube may be disposed within the housing and configured to move along the extension tube. An instrument may extend through the arc-shaped channel. A first end of the instrument may be fixed. In response to moving the housing distally along the extension tube, the pair of opposing pinch members may push the wedge distally. In response to movement of the wedge distally a first distance, a second end of the instrument may be configured to advance distally a second distance. A support element or compressible element may be disposed within a lumen of the extension tube to support the instrument.

The present invention relates to methods of transvascular retrograde access placement and to devices that facilitate these methods. For purposes of the present invention, transvascular retrograde access placement generally comprises the insertion of a vascular catheter into a central blood vessel through the puncturing of the central blood vessel from the inside of the central blood vessel with a needle or other similarly configured device, or a needle-tipped guidewire of the present invention, and exiting that needle from the patient through the skin rather than the traditional approach of inserting a needle from the outside of the skin surface to the inside of a blood vessel.

A method and apparatus are aimed to improve arteriovenous fistula maturation rate by treating the fistula with a crosslink agent solution (fixative solution). The fixative solution will crosslink proteins and biomolecules, allowing formation of crosslinks that stabilize or stable tissue structure. The method and apparatus will address factors that contribute to arteriovenous fistula maturation failure by stopping the neointimal hyperplasia growth after vascular injury and stabilizing the venous wall to prevent the lumen from narrowing.