Various embodiments of the present disclosure provide a medical device straightener. The medical device straightener can comprise an elongate shaft extending along a shaft longitudinal axis, the elongate shaft including a shaft proximal end and a shaft distal end, wherein a shaft inner wall of the elongate shaft defines a shaft lumen extending therethrough. The medical device straightener can comprise a bleedback valve that includes an outer circumferential surface. The bleedback valve can be disposed at a distal end of the elongate shaft, within the shaft lumen, wherein a portion of the outer circumferential surface is in communication with the shaft inner wall. The bleedback valve can define a radially expandable lumen longitudinally extending through a center of the bleedback valve.

The subject apparatus and methods include a bendable catheter having a tapered body allowing for advancement of the catheter deeper into the anatomy, while retaining adequate fluid flow through the catheter.

A stylet for axially stretching a catheter ensures flexibility in the distal side and a desired degree of stiffness in the proximal side to enable preferable insertion of a catheter assembly along a guidewire while preventing a kink or breakage. The stylet 50 includes a hollow outer layer tube 51 extending in an axial direction and a hollow inner layer tube 52 disposed in the inner periphery of the outer layer tube. The inner layer tube is formed from a material stiffer than that of the outer layer tube. In the inner layer tube, a distal portion has the inner periphery provided with a tapered diameter portion 52B having a diameter reduced toward the proximal side in the axial direction.

The present invention is directed to a dual lumen cannula configured to be inserted into a patient's body as simple as a single lumen cannula. The dual lumen cannula includes at least one inner lumen configured to be inserted into an outer lumen and connected via an inner lumen connection unit and an outer unit connection unit. Embodiments of the presenting invention further allow for the connection of at least one flow router to the other end of the inner lumen connection unit. When installed, the outer lumen is first inserted into the patient's body, followed by the insertion of the inner lumen into the outer lumen of the already cannulated patient until the inner lumen connector unit is in coupling contact with the outer lumen connector unit. Advantages of the inventive cannula presented herein include, among other things, reduction of external forces on the dual lumen cannula.

A vacuum aspiration system may be used to treat thromboembolic disease, such as deep vein thrombosis or pulmonary embolism. The system includes a housing, and a fluid flow path extending through the housing. A first catheter is in fluid communication with the flow path, and a connector is configured to place a source of aspiration in communication with the flow path. A clot container is carried by the housing. A hemostasis valve is provided in the housing, and configured to receive a second catheter and direct the second catheter through the first catheter.

The present disclosure is directed to a coaxial cannula assembly including an infusion tube defining a return lumen and having a proximal end and a distal end. The distal end of the infusion tube includes a plurality of infusion openings and a flow restriction member positioned between the plurality of infusion openings and a distal tip of the infusion tube. The cannula assembly also includes a drainage tube co-axially aligned with the infusion tube and having a proximal end and a distal end. The distal end of said drainage tube includes a plurality of drainage openings and a length of the drainage tube is less than a length of the infusion tube. The cannula assembly further includes a drainage lumen defined by a space between said infusion tube and said drainage tube.

A split dilator aspiration system is disclosed. The system includes a catheter, having an elongate, flexible tubular body with a proximal end, a distal end, a side wall defining a central lumen, and a handle on the proximal end. A dilator is advanceable through the central lumen, the dilator having an elongate body, cannulated to receive a guidewire, and an axially extending split along at least a portion of the elongate body, configured to allow removal of a portion of the dilator laterally from the guidewire.

Disclosed herein is a catheter defining a first lumen and a second lumen. A proximal portion of the catheter can be configured to separate along a longitudinal axis to allow a proximal portion of the first lumen to be trimmed to a different length than a proximal portion of the second lumen. The catheter can include a septum disposed laterally between the first lumen and the second lumen configured to facilitate separation of the first lumen from the second lumen. The septum can include grooves, perforations, and can be formed of different materials to facilitate separation. Further the septum can include a wire configured to facilitate separation of the first lumen from the second lumen. Separation and/or trimming of the lumens positions the subcutaneous access ports in a spaced apart relationship to differentiate between infusion and aspiration lumens of the catheter.

The present disclosure relates generally to dual-function medical devices with diagnostic and therapeutic capabilities, such as real-time visualization and ablation. Many embodiments may include an ergonomic handle and dual-lumen catheter configured for dual-function diagnostic and therapeutic use during a medical procedure, such as a duodenoscope. The medical device may be delivered within an endoscope working channel to provide real-time visualization (e.g., radial ultrasound imaging) and treatment (e.g., soft tissue ablation) of cancerous tissue. For instance, a first lumen may include a high-frequency linear or radial ultrasound and the second lumen may include a surgical instrument, such as an ablation tool. Some embodiments may include a controller with a feedback loop configured to adjust the therapeutic tool based on data from the diagnostic tool. For instance, the power of an ablation tool may be adjusted by the controller based on data generated by an imaging device.

The present invention contemplates devices and methods to administer nutritional compositions and/or therapeutic drugs directly into a portal venous system. For example, total parenteral nutrition therapy may be administered directly into the hepatic portal venous system thus circumventing known side effects of conventional parenteral administration. Alternatively, hepatic diseases and disorders may be treated using locally administered therapeutic drugs. Devices capable of direct portal venous system administration include, but are not limited to, a direct portal access catheter or a transjugular access catheter.