A catheter assembly may include a catheter adapter, which may include a body and a nose extending distally from the body. The nose may be generally cylindrical. A strain relief rib may be disposed on the nose. The strain relief rib may be constructed of a flexible material. The catheter assembly may also include a needle secured within the catheter adapter and extending distally beyond the nose. The catheter assembly may further include a needle cover, which may be removably coupled to the nose of the catheter adapter. An inner surface of the needle cover may be smooth and may contact the strain relief rib.

A catheter is capable of firmly fixing a shaft and a hub, and preventing a decrease in dimensional accuracy of an outer side of the hub in a radial direction. The catheter includes: a shaft that is a tubular body in which a lumen extending the shaft from a distal end to a proximal end is formed, and that includes a shaft proximal surface in which the lumen is opened and a shaft outer surface that is an outer peripheral surface of the tubular body; and a hub that is attached to the proximal end of the shaft. The hub includes a tubular accommodation unit configured to accommodate the shaft, the accommodation unit includes a hub melted surface that is directly welded to the shaft outer surface, and an absolute value of a residual strain of the accommodation unit decreases outward in a radial direction from the hub melted surface.

Embodiments herein relate to catheters including multiple braid layers. In an embodiment, a catheter is included having a catheter body, the catheter body can include a proximal end portion; a distal end portion; an inner liner; and a braided structure, the braided structure can include an inner braid layer, the inner braid layer can include a first set of inner wires; and a second set of inner wires; an outer braid layer, the outer braid layer can include a first set of outer wires; and a second set of outer wires; wherein the braided structure is disposed over the inner liner; wherein the first set of inner wires are larger than the second set of inner wires; and wherein the first set of outer wires are larger than the second set of outer wires. Other embodiments are also included herein.

Disclosed are microcatheter devices with features that provide effective axial response, good distribution of bending forces, and a smooth bending stiffness profile that minimizes abrupt changes in stiffness. A catheter device includes a microfabricated inner shaft having a plurality of gaps, and an outer member comprising a polymer material disposed within the gaps. The catheter device provides non-linear bending stiffness such that bending becomes more difficult as the bend angle increases.

A strain relief adapter (100) for a medicament delivery device (200) includes a flexible body (101) having a first end (102) configured to connect to one of a fluid connector and a pump connector, a second end (104) configured to connect to tubing, a hollow fluid path (108, 110, 112, 114) therethrough fluidly connecting the first and second ends, and a plurality of external strain relief ridges (106) disposed between the first and second ends.

A catheter includes a handle with torqueing and steering mechanisms. The torqueing mechanism includes a rotatable nosecone and a bearing coupled to the nosecone to be rotatable therewith. The bearing is concentrically disposed over a shaft of the catheter. The steering mechanism includes a rack coupled to the bearing to be slideable therewith and a pull wire having a proximal end attached to the bearing and a distal end attached to a distal portion of the shaft. Rotation of the nosecone causes an entire length of the shaft to rotate and axial movement of the rack tensions the pull wire to bend the distal portion of the shaft. A valve relief component is slidingly disposed over the shaft and is configured to dock onto the handle when not in use.

The present invention provides a catheter including a novel strain relief that prevents or suppresses kinks of a catheter body. An electrode catheter 100 including a hollow tube-shaped strain relief 200 that includes a hollow part 210 penetrating through in an axial direction, and a catheter body 10 having a base end part 10a inserted into the hollow part is provided, in which the strain relief has an outer-diameter gradually-decreasing part 230 toward a tip end, and the gradual decrease rate of the outer diameter in the outer-diameter gradually-decreasing part increases toward the tip end. The strain relief 200 includes at least two gradient change parts 241 and 242 where the gradual decrease rate of the outer diameter changes. In the strain relief 200, the inner diameter of the hollow part 210 gradually decreases from the base end to the tip end.

A system and method for delivering a medicament to a target tissue site in a patient over a period of time. A catheter is configured for implantation in different target tissue sites and extends from a proximal end to a distal end and has a sidewall which defines an internal lumen. The distal end has one or more apertures either in the sidewall or at a distal end for the release of the medicament into the target tissue site; the system also comprises a medicament reservoir fluidly communicable with the internal lumen of each catheter, an adhesive member configured to adhere to the skin of the patient around the exit wound and having an opening therein to allow the catheters to pass through the adhesive member and a retaining member configured to be overlaid on the adhesive member and comprising a guide surface configured to receive a length of the two or more catheters and a plurality of retaining portions to retain the catheters against the guide surface.

Balloon catheters that includes inner and outer elongate shafts, each of which is secured relative to an end of an inflatable member. The inner and outer elongate shafts are secured relative to one another at one more discrete connection locations. The balloon bonding locations are disposed radially inward relative to an outer dimension of the outer elongate shaft.

A catheter includes a shaft having a lumen extending from a distal end to a proximal end. The shaft includes a reinforcement body including a plurality of wires that are disposed on at least a part between an inner surface of the shaft forming the lumen and an outer surface of the shaft and that are braided in a tubular shape, and at least one radiopaque marker disposed between the reinforcement body and the outer surface of the shaft. An outer diameter difference, which is a difference between an outer diameter of the shaft in a portion where the marker is disposed and an outer diameter of the shaft in a portion adjacent to the marker in an axial direction of the shaft, is smaller than twice a thickness of the marker.