Abstract:
The disclosure provides a system and method for a programmable medical wire that can be preprogrammed, and controlled and reshaped upon command. The system can include a power supply, a controller, and a multilayered wire assembly. The wire assembly includes a core conductor, actuator conductors coupled to the core conductor, selective conductors formed adjacent the core conductor and the actuator conductors, and a protective biocompatible shield around the layers. The selective conductors can be energized to activate the actuator conductors and cause the actuator conductors to bend or twist in a preprogrammed manner. By selectively controlling the direction of movement of the actuator conductors, the wire assembly can be remotely guided through body passageways to the target. Auxiliary equipment such as sensors, micro cameras, detectors, cutters, and other equipment can also be coupled to the wire assembly, and controlled and communicated with through one or more of the selective conductors.
Abstract:
The object of the invention is a dialysis catheter assembly, comprising a test needle (IP), guidewire (P), stylet (M), main cannula (K) and at least one seal (KK), wherein in the proximal part the main cannula (K) comprises a vascular lumen (1a) connected with a rigid base of the lumen(1 ), in which common conduit (3a) extends to the distal end, branching out at least to a first arm conduit (3b) and a second arm conduit (3b), the distal end of the first arm having a tip (4b) and the distal end of the lateral conduit (3b) having a tip (5b), characterized in that the vascular lumen (1a) is made of elastic plastic, preferably of polyvinylchloride with the addition of di-2-ethylhexyl phthalate (DEHP), polyurethane or its medically acceptable thermoplastic variants such as Carbothane, in the branch part of a common conduit (3a) into the first arm conduit (3b) and second arm lateral conduit (3b) it is made of a soft material fully compressible under pressure of less than 2.5kg, preferably of biocompatible silicone, and the tips (4b) and (5b) are made of a rigid material, preferably of polyvinyl chloride (PVC) meeting the medical requirements of CE.
Abstract:
Sicherheitspunktionssystem mit einer Kanüle (1) und einem Führungsdraht (5), wobei die Kanüle (1) ein distales Ende mit einem Anschliff (4), ein proximales Ende (3) und ein Lumen zur Aufnahme des Führungsdrahts (5) aufweist, wobei der Führungsdraht (5) einen proximalen Abschnitt (15) mit einem proximalen Ende (16) und einem distalen Ende (16a) und einen distalen Abschnitt (6) aufweist, wobei der proximale Abschnitt (15) lösbar mit dem distalen Abschnitt (6) verbunden ist und wobei das proximale Ende (16) des proximalen Abschnitts (15) einen aufgeweiteten Bereich aufweist.
Abstract:
A guidewire a distal end and a proximal end, and a core wire having an inner core and an outer layer surrounding at least a portion of the inner core, the outer layer being tapered along the distal end of the guidewire, wherein one of the inner core and the outer layer is formed from at least one kink-resistant material and the other of the inner core and the outer layer is formed from at least one high column strength material.
Abstract:
An intracorporeal device includes an elongate tubular member. The tubular member can comprise one or more materials that have superelastic and/or shape memory characteristics. The tubular member can comprise one or more deformable zones and one or more elastic zones. The deformable zone(s) can comprise material(s) that are less elastic than the material in the elastic zone(s). The deformable and elastic zones can contain different materials or they can contain the same or similar materials that have been treated in order to change the elasticity or type of elasticity of one of the zones relative to the other zones, creating different elasticity between the elastic and the deformable zones. The intracorporeal device can be, for example, a guidewire, a catheter or any other intracorporeal device that can include an elongate tubular member.
Abstract:
A first guidewire structure includes a medical guidewire having a working portion which is extendable beyond a distal end of a medical instrument. The working portion has a length, and the working portion is tapered for substantially one-hundred percent of the length. A second guidewire structure includes a medical guidewire having a working portion, wherein the working portion has a length, and wherein the working portion includes a tapered portion for over fifty percent of the length. A third guidewire structure includes a medical guidewire having a working portion.. The working portion has a length, and the working portion includes a plurality of lengthwise-adjoining segment pairs for over fifty percent of the length. Each segment pair consists essentially of a non-tapered segment having a substantially constant cross section and a tapered segment lengthwise adjoining the non-tapered segment. Methods are described for using medical instruments having the guidewire structures.
Abstract:
A medical device with a corrugated shaping ribbon is provided, The corrugated shaping ribbon (34) allows for the medical device, which may be provided in the form of a guide wire (20) or catheter, specifically a crossing guide wire or catheter, to more easily navigate through the sometimes tortuous pathways of body lumens In addition, the corrugations (42) effectively provide a mechanism by which energy can be stored as the distal tip of the medical device engages a lesion or other area of occlusion within a blood vessel By storing such energy and continuing to apply force, eventually the distal tip (28) extends thereby releasing the stored energy and allowing the distal tip to advance or cross through the lesion.
Abstract:
A wire guide (10) has a wire core (12) and a braided sheath (14). The wire core (10) includes a proximal and distal ends, wherein the braided sheath (14) is attached to the distal end of the wire core (12, 20). The braided sheath (14) is woven of a plurality of strands (23) and may be made of stainless steel, a shape memory alloy, or a radiopaque material. The wire guide (10) has a flexible tip (22) at the proximal end opposite the flexible pulling section (20). A stiff section (24) is provided between the flexible tip (22) and the flexible pulling section (20). Proximate the distal end of the wire core (12) a tapered section (26) is provided to increase flexibility of the wire guide. The braided sheath (14) is received over and attached to the wire core (12). A shoulder (28) is provided in the wire core (12) providing a smooth transition form the wire core (12) to the braided section (14). The braided sheath (14) extends from the shoulder (28) beyond the distal end of the wire core (12).
Abstract:
A guidewire can include a shaft or core wire that has a distal section configured for access to a vascular treatment site and a proximal section configured for intervention at a vascular treatment site. At least a portion of the distal section of the shaft or core wire can have a diameter that is greater than a diameter of the proximal section.