Devices, systems and methods are used to decouple proximal movement of a catheter supply lead or tubing from the tissue-embedded catheter. A catheter decoupling device comprises a catheter hub, sled and track, wherein the hub comprises a proximal end configured to receive a catheter fluid supply device, and a distal end configured to receive a catheter, the sled receives and retains the hub, the track receives and retains the hub; and, the hub has a limited range of back-and-forth motion relative to the track.

The disclosed technology includes couplers, nose pieces, and strain relief hubs for ablation catheter assemblies and methods of using the same. The disclosed technology can include a medical probe having a coupler having a first portion, a second portion, and a vent port. The second portion can slide between a first position and a second position. When in the first position, the vent port can be at least partially obstructed by the first portion and, when in the second position, the vent port can be unobstructed by the first portion. The medical probe can include a nose piece having an outer diameter of less than 0.14 inches and an aperture extending therethrough. The aperture can be sized to receive a catheter. The medical probe can include a strain relief hub having a first portion and a second portion and configured to be coupled to a handle of the medical probe.

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 securement device configured to secure an external portion of a medical device to the skin surface of a patient after an internal portion of the device has been placed in the patient is disclosed. The securement device includes a retainer that is employed to securely retain the external portion of the medical device in place. The retainer is attached to a base, such as an adhesive pad that adhesively attaches to the skin surface. In one embodiment, therefore, a retainer comprises a body defining a channel configured to receive therein a portion of the medical device, and at least one foot extending from the body that is configured to stabilize the retainer with respect to a skin surface. The retainer body further includes a nose that is configured to deflect a portion of the external portion of the medical device toward the skin insertion site.

The present disclosure is directed to an over-the-needle (OTN) catheter assembly having an expandable catheter. More specifically, the OTN catheter assembly includes a catheter having an expandable body with a proximal end and a distal end coaxially mounted onto a needle. The body defines a lumen extending from the proximal end to the distal end. Further, the body is expandable between a compressed length and an expanded length. The needle is configured within the lumen of the catheter and has a first length. The first length is longer than the compressed length of the catheter and shorter than the expanded length of the catheter. In addition, the body of the catheter is configured to expand from the compressed length to the expanded length when heat is applied to the catheter such that the distal end of the catheter extends past a distal end of the needle.

Catheter systems with multiple inner lumens that converge at the catheter distal tip are preloaded with at least two guidewires. The catheters offers sequential probing with two or more guidewires, therefore improving on procedural speed and accuracy. The catheters comprise proximal and distal regions enabling angled lumens to merge into a common lumen with a diameter slightly larger to the largest of the two proximal lumens. The confluence of the two proximal lumens comprises a single lumen with a reduced profile and cross sectional area. The lumens merge with the larger lumen at an angle greater than zero degrees, and the distal tip has a diameter equal to the diameter of the smaller proximal lumen. The proximal region serves as a directed passageway for different guidewires that enter the catheter through two proximal lumens and which may be reoriented through a convergence region for sequential exiting of the catheter tip.

A catheter includes: a catheter shaft; and a hub on a proximal side of the catheter shaft. The catheter shaft includes a shaft inner surface inclined portion at a proximal portion, the diameter of which increases proximally such that the shaft inner surface inclined portion forms an angle with the catheter central axis. The hub includes a first hub inner surface inclined portion continuous from the shaft inner surface inclined portion and inclined at the same inclination angle as the shaft inner surface inclined portion, and a second hub inner surface inclined portion proximal of the first hub inner surface inclined portion. The second hub inner surface inclined portion inclination angle differs from the first hub inner surface inclined portion inclination angle. The hub does not cover an inner peripheral surface of the catheter shaft in an interlock portion in which the catheter shaft and the hub are interlocked together.

A delivery catheter for implanting a self-expanding implant such as a cardiovascular implant. An outer catheter shaft is formed as an implant capsule for encasing the implant during delivery. A flexible distal support element having a substantially truncated cone-shaped portion, which tapers in the proximal direction, is attached, directly proximally of the implant, in a fixed position to a first, inner catheter shaft, and/or a flexible proximal support element having a substantially truncated cone-shaped portion, which tapers in the proximal direction, is inserted at the proximal end of the implant capsule into the second, outer catheter shaft in a fixed position.

A catheter system 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. A bump may be disposed on the strain relief rib and configured to contact a needle cover. A catheter may be secured within the catheter adapter and extend distally beyond the nose.

An anchor strain relief member provides resistance to disengagement from a hemostatic valve due to forces tending to force the catheter in a proximal direction. The anchoring strain relief member is distal to a hub, joined to the catheter outer surface, and comprises a sealing portion that has at least one ridge that has a ridge tip and a ridge height defined by a distance from the ridge tip to the catheter central axis. Methods of forming a nested catheter system are described using a catheter with an anchor strain relief as the inner catheter for the nested catheter set. Systems of a hemostatic valve and a suitable catheter with an anchor strain relief member can provide for desired assemblies of components.