An integrated catheter assembly includes a housing member, an outer lumen member extending from the housing member, and a needle member slidably or movably coupled to the housing member, wherein the needle member can be extended beyond a first port of the outer lumen member in a first position and concealed in the outer lumen member in a second position. The outer lumen member has a side port between its first and second ports such that when the needle is extended in the first position and inserted into an arteriovenous fistula, blood from the arteriovenous fistula flashes into the needle member, is diverted through a relief port of the needle member out the side port of the outer lumen member for delivery to a dialysis machine. The assembly further includes an inner lumen member that is disposable through the housing member to extend out from the same the outer lumen member to provide dialyzed blood from the machine. The assembly therefore receives and delivers blood through a single injection site.

An Amplatz sheath for positioning inside a natural or artificially created bodily cavity in a human or animal has a distal end toward the body and a proximal end away from the body, with at least one lumen being formed between the distal end and the proximal end. At least in a region at the proximal end, the Amplatz sheath is transparent or translucent and, in this region, has at least one marking for determining the position of the Amplatz sheath in relation to a catheter that can be received in the lumen. The Amplatz sheath can be used with a balloon catheter in a dilation system.

Devices and methods for allowing for improved assisted ventilation of a patient. The methods and devices provide a number of benefits over conventional approaches for assisted ventilation. For example, the methods and devices described herein permit blind insertion of a device that can allow ventilation regardless of whether the device is positioned within a trachea or an esophagus.

An object of the present invention is to provide an anti-adhesive/anti-clogging and/or color marked/tinted micro-capillary tube (microtube), microneedle, or micropipette. Typically, the color/tint will be selected such that the tip of the microneedle or micropipette is in contrast (e.g., visually) to the biological material. The tint/color may be selected to contrast the stained biological material. In some aspects, the color mark comprises nanoparticles that are modified by adding a non-adhesive coating/material that minimizes protein adhesion/adsorption. The microtubes and/or micropipettes may be treated with an anti-clogging reagent and an anti-adhesive reagent to prevent or reduce clogging and adhesion of the micropipette or microneedle to biological materials. The microtubes and/or micropipettes may be formed using additive printing processes and additive manufacturing techniques or from micropipette and microneedle pullers.

Disclosed is a curved balloon catheter retractor, comprising a positioning balloon (11) provided at the head of a catheter (10), and a bendable curved balloon (12) provided at a portion on the catheter (10) that is close to the head, wherein the positioning balloon (11) and the curved balloon (12) are respectively connected to respective injection ports at the tail of the catheter (10) by means of pipelines inside the catheter (10); and a handle (14) is provided at the tail of the catheter (10) for adjusting the position of the catheter (10). In a non-use state, the positioning balloon (11) and the curved balloon (12) are tightly attached to the catheter (10). In an in-use state, fluid is injected from the injection port of the positioning balloon (11), such that the positioning balloon (11) is expanded to achieve the positioning effect; and the fluid is then injected into the curved balloon (12), such that the curved balloon (12) and part of the catheter (10) in the curved balloon are curled and deflected towards one side to create the retraction. In this way, simple and reliable retraction of the catheter (10) is achieved.

In some examples, a catheter may include an elongate body and a push assembly. The elongate body may include an inner liner defining an entry port into a lumen, and an outer jacket. The push assembly may an elongate member extending from a proximal portion to a distal portion, where a cross-section of the distal portion is D-shaped and tapers in a distal direction. Distal to a proximal end of the elongate body, a first portion of the elongate member may be positioned between a portion of the inner liner and a portion of the outer jacket, and proximal to the proximal end of the elongate body, a second portion of the elongate member may be positioned outside of the outer jacket and the inner liner.

Described are methods, systems, devices for facilitation of intraluminal medical procedures within the neurovasculature. A catheter advancement device includes a flexible elongate body having a proximal end, a distal end, and a single lumen extending therebetween. The flexible elongate body has a proximal segment, an intermediate segment, and a tip segment. The proximal segment includes a hypotube coated with a polymer. The intermediate segment includes an unreinforced polymer having a durometer of no more than 72D. The tip segment is formed of a polymer different from the intermediate segment and has a durometer of no more than about 35D and a length of at least 5 cm. The tip segment has a tapered portion that tapers distally from a first outer diameter to a second outer diameter over a length of between 1 and 3 cm.

An improved hypodermic needle featuring a tip with an aperture that is not axially aligned with the shaft of the needle designed to increase the success rate of needle insertion for placing a guidewire by reducing the incidence of complications such as vessel wall injury or dissection and distal embolization and providing the physician with greater feedback confidence by giving more accurate bleed-back from the true lumen of the vessel.

Provided is a medical guidewire that ensures adhesion of a coating layer and exhibits excellent smoothness. A medical guidewire including includes a wire body that is flexible and long, an intermediate layer that has at least one layer and covers a surface of the wire body, and an outermost layer that covers a surface of the intermediate layer. The intermediate layer is colored by including a pigment, and a concentration of the pigment is 50 wt % or more and 90 wt % or less with respect to the intermediate layer as a whole.

A catheter system for accessing the central venous system through an occlusion in the neck region.