An embodiment of the present invention provides for an elongated medical device with a hypotube backbone running through the device, and a spiral lumen spiraled around the backbone along the length of the backbone. The backbone may be formed from a nitinol alloy for increased bendability without compromising axial stiffness. The device may also incorporate a jacket around the hypotube and spiral lumen formed using either melting, molding, bonding, or casting. The spiral lumen may be configured to accommodate a variety of uses, including actuation members (e.g., pull wires), tools, and means for aspiration, irrigation, image capture, and illumination. Additionally, the present invention provides a method for constructing an elongated medical device with a hypotube backbone running through the device, and a spiral lumen spiraled around the backbone along the length of the backbone.

A clot retrieval catheter can have a tailored, highly flexible body section capable of navigating tortuous routes and an expandable tip for local flow restriction/arrest. The body can be a support tube of struts with a plurality of ribs and one or more axial spines. The support tube can also be a tubular section with a pattern of radial slots to increase flexibility while inhibiting kinking and binding. The ribs and spines can have strut widths which vary along the length of the support tube or can have curves with a non-planar cross section. The ribs can be formed such that they can move when subjected to the loads of a thrombectomy procedure. The structure of the support tube can also be a braided or woven pattern of strands. The support tube can also have a polymer jacket or membrane disposed around at least a portion of the structure.

A novel variable diameter aspiration catheter (VDAC) device and method for an enhanced endovascular mechanical thrombectomy technique is disclosed. In an aspect, the use of a VDAC allows endovascular mechanical thrombectomy techniques to be performed with “full flow control”.

A kink-resistance catheter has a first pair of core wires residing in the catheter body on opposed side of a catheter lumen. The core wires have relatively stiff proximal ends but taper toward their distal ends. The tapered construction provides the core wires with a degree of distal flexibility that helps the catheter advance along a vasculature to a site of interest without kinking and with improved torsional rigidity. If desired, shaping ribbons are provided in the catheter body adjacent to the distal ends of the core wires. The shaping ribbons can be pre-bent before a surgical procedure to help the physician advance the catheter along the vasculature. Finally, the core wires provide the ability to push the catheter through the vasculature with out the need for the catheter to go over a guidewire already in-situ in the vasculature.

Systems and methods of implanting a vascular access technologies and declotting vascular access technologies, such as vascular access assemblies that facilitate hemodialysis, are provided. The methods can include disposing a first tubular conduit within a patient to access a vascular access assembly within the heart of the patient. The first tubular conduit can be coupled to the vascular access assembly such that the first tubular conduit can be decoupled from the vascular access assembly to evacuate a clot within the vascular access assembly, and then recouple the first tubular conduit to the vascular access assembly.

This catheter includes an outer layer formed of a resin, and an inner member covered with the outer layer. The distal end of the inner member is located proximally of the distal end of the outer layer. The outer layer has a first region extending from the distal end of the outer layer to the distal end of the inner member, and a second region which is positioned proximally of the first region and covers the inner member. The resin which forms the second region of the outer layer has a lower hardness than the resin which forms the first region.

In some examples, a catheter includes an inner liner, an outer jacket, and a structural support member positioned between at least a portion of the inner liner and at least a portion of the outer jacket. A surface of at least a portion of the structural support member is surface treated to increase an adhesion of the surface to at least one of the inner liner or the outer jacket. Examples surface treatments include physical treatments, chemical treatments, coating treatments, and combinations thereof. In some instances, the at least one portion of the structural support member is a relatively high density portion.

The embodiments disclosed herein relate to balloon catheter assemblies. The balloon catheter assemblies can include a hub, an elongated member, and an inflation balloon. The balloon catheter assemblies can also include a support wire having a proximal end that is longitudinally displaceable within a sleeve that is disposed in the catheter hub. A distal end of the support wire may be coupled to the inflation balloon at one or more positions.

In some examples of a method of forming a catheter, a structural support member is positioned over an inner liner. Prior to being positioned over the inner liner, the structural support member tapers in diameter along at least a portion of a length of the structural support member.

A set for peripheral nerve blocking, including a rigid cannula, an outer catheter sleeve which can be slid over the cannula, where the distal tip of the cannula protrudes over the distal end of the catheter sleeve, an inner catheter which can be inserted through the catheter sleeve after removal of the cannula from the catheter sleeve and which has an outlet opening at the distal end, and a first connector piece at the proximal end of the catheter sleeve, where the inner catheter has a second connector piece complementary to the first connector piece, and the inner catheter can be fixed in an axial position by connecting the first connector piece and the second connector piece in the catheter sleeve, in which axial position the distal end of the inner catheter protrudes from the distal end of the catheter sleeve with a pre-defined length which has the outlet opening.