Abstract: The present disclosure relates to medical devices for facilitating introducing, removing, and/or exchanging an accessory and/or tool, such as a guidewire. In an embodiment, a catheter port for introducing an accessory may comprise a body comprising a proximal end, a distal end, a longitudinal axis extending therethrough, and a main channel extending along the longitudinal axis along a length of the body. The main channel may be substantially coaxial with a lumen of a catheter. An extension may extend from the body. The extension may comprise an accessory channel extending through the extension. The accessory channel may be in fluid communication with the main channel. The accessory channel may be configured to accept the accessory. A positive stop may be disposed along the accessory channel. The positive stop may be configured to abut a distal end of the accessory.

Abstract: The present disclosure, in its various aspects, is directed to expandable guide devices, implementation methods, and related systems. In one example, an expandable guide device is configured to receive an instrument through an instrument lumen of the device. Each of a plurality of expandable members are disposed circumferentially about a body of the device that defines the instrument lumen, and each expandable member is configured to be independently transitionable between an expanded configuration and an unexpanded configuration.