A guidewire-guiding device, and guidewire-guiding assembly. The device comprises a main guidewire channel and guidewire-guiding channels are respectively arranged in the guiding body. The main guidewire channel and the guidewire-guiding channels respectively pass through the guiding body along axial direction, and in-vivo end openings of the guidewire-guiding channels and the in-vivo end opening of the main guidewire channel are arranged along the axial direction at intervals. The guiding body may be imbedded into a vessel in-vivo via the main guidewire penetrating through the main guidewire channel, and as the in-vivo end openings of the guidewire-guiding channels are arranged along the axial direction at intervals, the to-be-guided guidewires enter the guidewire-guiding channels while being staggered to the main guidewire on the axial direction, therefore the problem of tanglement of the main guidewire the branch guidewires and other kinds of guidewires may be avoided.

A sphincterotome device can be used to achieve appropriate positioning within the biliary duct during cannulation. The sphincterotome device enables performance of a “double-wire” or multiple wire procedure without the need for removal and reintroduction of the sphincterotome device, thereby allowing for a shorter procedure.

The catheter of the present invention includes a tubular member having a reinforced portion and an unreinforced portion having a tapered portion; and a handle connected to a proximal end portion of the tubular member; wherein the handle has a first lumen and a second lumen positioned proximally beyond the first lumen, the unreinforced portion is fixed to the first lumen with a proximal end of the unreinforced portion positioned at the proximal end of the first lumen, and the catheter satisfies formulae (1) to (3):

a<b  (1)

a<c  (2)

b≥c  (3), where a is an inner diameter at a position apart by 1 mm distally from a proximal end of the reinforced portion, b is an inner diameter at the proximal end of the unreinforced portion, and c is an inner diameter at the distal end of the second lumen of the handle.

Catheters are described that have improved flow characteristics that may be particularly helpful when delivering embolic agents within a blood vessel. One catheter includes a fluid flow modifier that is configured to create laminar fluid flow out of a distal end of the catheter to help reduce turbulence and achieve predictable fluid movement. Another catheter includes scavenging ports that are configured to suction in embolic agents that have refluxed proximally back from a distal end of the catheter.

Ablation systems of the present disclosure facilitate the safe formation of wide and deep lesions. For example, ablation systems of the present disclosure can allow for the flow of irrigation fluid and blood through an expandable ablation electrode, resulting in efficient and effective cooling of the ablation electrode as the ablation electrode delivers energy at a treatment site of the patient. Additionally, or alternatively, ablation systems of the present disclosure can include a deformable ablation electrode and a plurality of sensors that, in cooperation, sense the deformation of the ablation electrode, to provide a robust indication of the extent and direction of contact between the ablation electrode and tissue at a treatment site.

A dual tip dialysis catheter has a proximal portion with connected lumens and a distal portion with diverging lumens. The lumens may separate at a split junction and diverge in a scissors like manner to reduce or eliminate a crack or gap adjacent to the split junction, thereby reducing clotting. A dual tip dialysis catheter may have forward openings configured to direct flow in opposite directions.

A system for perfusing a localized site within a body includes a catheter assembly having a venous access line that is adapted to deliver perfusate to the localized site, a venous or arterial drainage line adapted to drain perfusate from the localized site, and an occlusion device adapted to prevent some or substantially all physiological blood flow between the localized site and the systemic circulation of the body during and in the course of perfusing and draining perfusate to and from the localized site. The system may include a blood circuit associated with the catheter assembly to facilitate blood conditioning for use as the perfusate, in the course of a controlled perfusion and/or drainage of untreated, treated, or inactivated treated blood to and from the localized site. A delivery machine may control the blood circuit and catheter assembly in order to both deliver perfusate to, and drain some or all perfusate from, the localized site in a manner that provides perfusate to substantially only the localized site.

A multilumen catheter assembly includes a unitary portion and at least two distal end tubes extending distally from the unitary portion. The unitary portion includes an exterior having a generally circular shape in cross section and is attached to the at least two distal end tubes. In one embodiment, the catheter assembly may be made by extruding a unitary tube having internal longitudinally extending lumens, then splitting the unitary tube at a distal end portion of the unitary tube to form the at least two distal end tubes. The at least two distal end tubes are then ground and polished. In another embodiment, the catheter assembly may be made by extruding the at least two distal end tubes and permanently bonding proximal ends thereof to form the unitary portion.

A deflection catheter is disclosed for aiding in bending of a catheter or other elongate medical device transseptally delivered within a left atrium of a heart. The deflection catheter includes a deflection aid assembly having an outer component, an inner component and a connecting band. The connecting band connects a first inner branch segment and a second inner branch segment of the inner component, and also extends between a first outer branch segment and a second outer branch segment of the outer component whereby a catheter receiving opening is defined between the connecting band and the first and second outer branch segments. Proximal/distal movement of the inner component relative to the outer component increases/decreases an area of the catheter receiving opening in order to secure the catheter or other elongate medical device to the deflection aid assembly for subsequent bending by proximally tugging or pulling on the deflection aid assembly.

In one aspect, a connector assembly includes a delivery conduit defining a conduit lumen and a securable connector configured to secure the delivery conduit to a medical device hub defining a medical device hub lumen. The conduit lumen includes a constant diameter region along a portion of the delivery conduit and a transition region extending from the delivery conduit to the distal end. A transition region diameter of the transition region gradually increases from the constant diameter region to a distal end of the delivery conduit. The securable connector is coupled to an outer surface of the delivery conduit and is slidable along a portion thereof. The securable connector is configured to receive the medical device hub. The securable connector is secured relative to the delivery conduit so as to fluidically couple the conduit lumen with the medical device hub lumen.