A dilator device including an elongated flexible material sleeve having a hollow interior extending along a distal portion and a proximal portion thereof. An expandable or inflatable bladder is connected to the distal portion and disposable radially outward from an exterior of the sleeve when in an expanded and/or inflated orientation. The elongated sleeve comprising a tip having a predetermined configuration that facilitates positioning the elongated sleeve within an intended body part. A fluid input is structured for removable connection to a fluid source and is disposed on the sleeve, in fluid communication with the bladder. An access opening is formed on the proximal portion and is cooperatively dimensioned with the hollow interior to removably receive any one of a plurality of different types of positioning instruments within the sleeve.

A multi-lumen catheter including an elliptical cross-sectional profile configuration that enhances fluid flow rate while minimizing the average diameter of the catheter body is disclosed. In one embodiment the catheter includes an elongate catheter tube defining a plurality of lumens. At least a portion of the longitudinal length of the catheter tube may define an elliptical cross section, in turn defined by a major axis and a minor axis. In one embodiment, a ratio of the major axis to the minor axis of the elliptical cross section is between about 1.3 and about 1.4. The catheter body can define two, three, or more lumens. In one embodiment, a dual-lumen catheter tube includes an aspect ratio of about 1.1:1, and each lumen thereof includes an inner surface defined by a plurality of radii and an hourglass-shaped septum.

An expandable mouth for a catheter can be capable of local flow restriction and provide a large mouth opening providing sufficient radial force while having the flexibility to reach and retrieve an occlusive clot. The expandable mouth can have a framework with a collapsed state so the clot retrieval catheter can be compatible low-profile outer catheters and an expanded state for contacting the walls of a vessel and sealing off or restricting proximal flow. The framework can have one or more support arms and distal support hoops which can have narrowed segments, undulations, closed cells, and other flexibility enhancing features. Alternately, the framework can be a mesh having an array of closed cells. The expandable mouth can feature a membrane cover disposed around the supporting framework. These improvements can provide safe and rapid access to complex areas and more reliably remove occlusions while shortening procedure times.

A device for providing antegrade vascular access through retrograde approach is disclosed. The device includes a balloon arranged on a sheath and one or more side holes formed in the sheath proximal of the balloon. The balloon may be bulbous. A method for providing antegrade vascular access through retrograde approach is also disclosed.

A catheter having a selectively inflatable external balloon and an internal balloon, where the internal balloon is operable as a valve to control fluid flow through a channel.

A vascular access sheath includes an inner support structure extends from a hemostasis valve toward a distal end section of the access sheath. An outer polymer is disposed over the inner support structure, where the outer polymer has an exterior surface extending from the hemostasis valve to a distal tip of the access sheath. The outer polymer has a consistent thickness along the access sheath and defines a greater durometer an intermediate section of the access sheath than at the proximal and distal end sections of the access sheath. The outer polymer also has a secondary lumen disposed between the exterior surface and the central lumen, where the secondary lumen extends at least partially along the length of the access sheath and is configured to receive a wire to reinforce the stiffness of the intermediate section of the access sheath.

A medical system includes an insertion device including a delivery shaft with an internal lumen, a coupling tube coupled to the delivery shaft and configured to receive a medical device, and a liner tube inserted through the internal lumen of the delivery shaft.

Disclosed herein are aspiration guide catheters having a pre-shaped distal portion configured to deflect away from a longitudinal axis of the catheter, and associated systems and methods. In some embodiments, an aspiration guide catheter includes an inner liner defining a lumen and having a proximal region and a distal region. The catheter further includes a braid of wires over the inner liner, and a wire coiled around the braid over at least a portion of the distal region of the inner liner. At least a portion of the braid over the distal region of the inner liner is configured to deflect away from a longitudinal axis of the proximal region. The catheter can further include an outer sheath over the braid, the wire, and the inner liner.

Embodiments disclosed herein are directed to a drainage control system including, a tubular body with a tubular body lumen extending from a distal end to a proximal end and a collapsible tube disposed within the tubular body lumen, the collapsible tube including a collapsible tube lumen extending from a distal end to a proximal end of the collapsible tube. The collapsible tube can be attached to the tubular body, such that fluid flow through the tubular body lumen flows through the collapsible tube lumen. The tubular body can include a valve that is actuatable between a first configuration wherein fluid flow is allowed through the tubular body lumen and a second configuration wherein fluid flow is prevented through the tubular body lumen. An airflow source can be coupled to the valve such that pressure from the airflow source actuates the valve.

Disclosed herein is a catheter pump that includes an expandable cannula and an impeller system. The expandable cannula defines a blood flow channel and includes an impeller blade zone, an inlet zone, and an outlet zone. The catheter pump further includes an impeller system including an impeller body, the impeller system movable relative to the expandable cannula along a longitudinal axis of the catheter pump. The catheter pump is selectively transitionable between a separated configuration in which the impeller body is axially spaced from the expandable cannula along the longitudinal axis, and an operational configuration in which the impeller body is positioned within the impeller blade zone of the expandable cannula.