A vascular access system which may be configured for blood draw may include a housing, which may include a distal end, a proximal end, and a slot disposed between the distal end and the proximal end. The slot may include a notch. The vascular access system may include a cannula hub, which may be disposed within the housing and movable with respect to the slot. The cannula hub may include a tab extending through the slot. The vascular access system may include a cannula extending distally from the cannula hub. In response to the tab being disposed within the notch, a distal tip of the cannula may be disposed within the housing. In response to advancing the tab along the slot to a distal end of the slot, the distal tip of the cannula is disposed distal to the distal end of the housing.

The invention is directed to methods and devices to facilitate positioning of a catheter into a vessel and selectively controlling flow of fluids through the catheter until desired using one or more valves.

The present application discloses medical instruments that utilize self-healing polymers as all or portion of the valves and valve assemblies thereof, such that these valves can self-heal while or after being punctured by an ancillary device during a surgical procedure and thereby help minimize blood loss and achieve hemostasis.

Devices, systems, and methods for sealing medical devices, particularly during intravascular access, are disclosed herein. Some aspects relate to a hemostatic valve for sealing a wide range of medical devices, such as catheters, wires, embolectomy systems. The valve can include an elongate member having a first end, a second end, and a central lumen extending therebetween. A reinforcement structure extends along at least a portion of the elongate member and is coupled to the elongate member. A shell defining a first aperture and a second aperture may be included, which first and second apertures can be fluidly coupled by the elongate member. A tensioning mechanism is coupled to the shell and to the elongate member, the tensioning mechanism can be moveable between a first configuration wherein the tensioning mechanism is collapsed and the central lumen is sealed and a second configuration wherein the central lumen is open.

An aspiration system exhibits an accelerated drop in negative pressure at the distal end of an aspiration catheter from the time of opening a valve. The system includes an aspiration pump in communication with a first chamber, and an aspiration catheter configured for placement into fluid communication with the first chamber by way of an elongate aspiration tube. A second chamber is provided between the aspiration tube and the catheter, and a valve is provided between the second chamber and the aspiration catheter. Upon opening of the valve with negative pressure at equilibrium in the first and second chambers, resistance to fluid flow between the second chamber and the distal end of the catheter is less than the resistance to fluid flow between the second chamber and the first chamber, causing a rapid aspiration into the second chamber.

Mechanical thrombectomy systems including an elongate catheter configured as an elongate inversion support, a flexible tractor configured to roll and invert over the distal end of the elongate inversion support, and a clot engaging member on the distal end of an elongate manipulator are described herein. These systems may capture a clot using the clot engaging member and draw the clot and clot engaging member and roll the flexible tractor into the catheter to remove the clot and clot engaging member from a vessel.

To provide a chemical ablation device that enables simple performance of chemical ablation treatment including pre- and post-treatment potential measurements. A chemical ablation device according to the present invention includes an electrode-equipped guidewire (30) with which intracardiac potential is measurable, an over-the-wire balloon catheter (40) having a guidewire lumen (415) into which the electrode-equipped guidewire (30) is to be inserted, a Y-shaped connector (50) connected to a proximal side of the balloon catheter (40) and including a guidewire port (51) and an expansion port (53), and a hemostasis valve (60) connected to the guidewire port (51) of the Y-shaped connector (50) and including a side-infusion tube (65) for supplying ethanol to the guidewire lumen (415) of the balloon catheter (40). The ethanol supplied to the guidewire lumen (415) of the balloon catheter (40) is ejected from an opening of a distal tip (47).

An antimicrobial lubricant applied to an outer surface of an introducer needle as part of a catheter assembly device. The catheter assembly device further includes a blood control septum having a slit through which the introducer needle is threaded. The antimicrobial lubricant is squeegeed, or removed from the outer surface of the introducer needle as the needle is removed from the slit following catheterization. The removed antimicrobial lubricant forms a deposit on the septum at a location proximate to the slit, thereby preventing colonization and growth of pathogens on the septum and other adjacent components and surfaces of the catheter assembly device.

A robotic catheter system including a first drive mechanism configured to interact with an elongated medical device to cause the elongated medical device to move along its longitudinal axis. A wiper assembly includes a first wiping surface moving toward and away from the longitudinal axis. A controller provides a signal to a motor to move the first wiping surface toward the longitudinal axis when the elongated device is being withdrawn from a patient.

A medical valve assembly includes a tube extending between a first tube end and a second tube end to define a passageway extending along a longitudinal axis between the ends. A plunger plate extends radially from the second tube end of the tube, and a valve housing surrounds the tube about the second tube end and extends from a first valve housing end to a second valve housing end. The valve housing includes a housing flange extending radially inwardly from the second valve housing end and disposed in spaced relationship with the plunger plate to define a distance dimension D extending therebetween. An elastomeric seal is compressed between the plunger plate and the housing flange, and one of the valve housing and the tube is axially movable relative to the other to vary the distance between said plunger plate and said housing flange and adjust an inner diameter of the elastomeric seal.