Abstract: A guidewire extension system including a guidewire and an extension wire is disclosed. The system includes female and male connector segments located on the proximal end of the guidewire or the distal end of the extension wire. The hollow female connector segment, in one embodiment, includes a radial lip which intersects with lateral slots. The male connector segment includes an external groove. When the male connector is inserted into the female connector segment, the slots are expanded and the lip snaps into the groove providing a tactile indication that connection is completed.No restriction or frictional fit is created. The guidewire and extension wire are freely rotatable with respect to each other and can be multiply connected and disconnected. Methods of catheter exchange with tactile indication of guidewire extension wire connection are disclosed.
Abstract: A guide wire having state-of-the-art handling characteristics for ease in positioning a variety of catheters and other devices within the cardiovascular or other body system wherein the guide wire is also suitable for infusion of small volumes of fluid. The exceedingly small diameter guide wire has unique infusion properties. The guide wire body has at least one helical coil having a flexible nonporous sheath within the lumen. The helical coil is close wound along the majority of its length. The distal end of the helical coil has spaced windings to permit infusion of the fluid. The flexible nonporous sheath terminates proximal to the space wound portion. The solid core wire, which runs the entire length of the guide wire, is located within the same lumen used for infusion. This provides a greatly increased surface area in relation to the cross sectional area of the infusion lumen ensuring a slow but extremely constant infusion rate over a wide range of infusion pressures.
Abstract: An apparatus and method for dissolving and removing material which tends to occlude a body passage way, such as an artery. The device employs a dual catheter system arranged in coaxial fashion. Each of the catheters has an inflatable balloon at its distal tip. Inflating the two balloons occludes the body passage way both proximal and distal to the treatment area, thus isolating it from fluid contact with the rest of the body. Because concentric catheters are used, the distance between the balloons and hence the size of the treatment area is adjustable. The thrombolytic agent is infused through orifices in the inner catheter in the region between the two balloons. A piezo electric device supplies ultrasonic agitation within the treatment area. A pressure device monitors the body passage way for unsafe conditions. Aspiration is accomplished through one or more lumens in the outer catheter.
Abstract: A wire containing or dispensing article and method are disclosed. The invention is used to dispense wire from a tubular wire carrier. The invention is particularly useful for containing/dispensing a guidewire, especially a coated guidewire. The article is an elongate dispensing sleeve or collar having an axial hole or bore through which a wire may pass. The sleeve has a cylindrical sleeve body with lateral projections on its outside and a plurality of transverse slits passing through its wall. The lateral projections and slits cooperate to permit wire to be restrictively engaged at the bore and to be controllably dispensed from the carrier by the partial insertion and removal of the sleeve into and out of the carrier. The method is controllable dispensing of the wire from the carrier by utilization of the article.
Abstract: A catheter for removing vascular obstruction(s) is disclosed. The catheter employs a configuration comprising generally coaxial, rapidly rotatable drive cable, fluid output lumens or channels, and fluid input lumens or channels. The drive cable is fixedly coupled to an elongate head so as to permit the head to be rapidly rotated by the drive cable. The head includes flats or impellers which, when rapidly rotated, generate a zone of turbulence or a vortex adjacent the vascular obstruction. The turbulence generated by the device tends to break up or dismantle the obstruction. The fluid input and output mechanisms permit fluid to be delivered to the vicinity of the obstruction and debris from the obstruction to be removed.In a preferred practice, a catheter of the invention is hollow, permitting it to be slid over a guide wire which has been steered to the site of the vascular obstruction.
June 21, 1991
Date of Patent:
December 28, 1993
Lake Region Manufacturing Company, Inc.
Creg W. Dance, John Vanden Hoek, Victor R. Blackledge
Abstract: An apparatus for removing obstructions within a blood vessel of a patient using mechanical motion. The device has a catheter which is inserted into the vascular system at a convenient point, such as the femoral artery. The distal end of the catheter is advanced until it reaches the occlusion. A central lumen within the catheter contains a coil spring which functions as a flexible shaft to couple rotational motion provided by an electric motor or other source of rotational motion at the proximal end of the catheter to a cutting head at the distal end of the catheter. As the cutting head is rotated, the occlusion is milled away by the internal cutting edges of the cutting head. The particles cut from the occlusion are forced by the rotational motion of the cutting head into one of a number of outer lumens of the catheter. A vacuum is applied to the proximal end of some of the outer lumens to remove the particles from the patient's body.
Abstract: Disclosed herein are various types of guidewires that are provided with spaced indicia to indicate the distance that a guidewire is extended into a vascular vessel, catheter or other instruments. That is, there are disclosed J-type, linear type and steerable type guidewires. Preferably the indicia is made up of a system of marks to indicate various units of measurements, for example units of 10, with narrow bands representing the units such as 10, 20, 30 and 40 while wider bands represent units of 50. If the guidewire is a double ended guidewire then the indicia would represent progressively higher indicia from each end of the linear part of the guidewire. Preferably the marks are formed by electro-chemical etching of the metal wire forming at least a part of the guidewire and if desired may be provided with a clear plastic coating that is non-toxic and bio-compatible. The marks may be formed by other process, for example laser treatment.
Abstract: A guide wire handle for selectively stiffening a guide wire and releasably locking the guide wire in a stiffened condition that includes a main body that can be held by one hand and has a rectangular opening in which there is mounted a slide member that is movable between a guide wire datum position and a guide wire stiffened position. The main body and slide member have elongated linear slits and bores with or without metal plate extended therein. A sleeve on the core wire proximal end abuts against the slide member plate and the proximal end of the coil spring abuts against the main body plate such that as the slide member a plate is moved away from the body plate, the coil spring is compressed and the core wire is placed in tension to stiffen the guide wire.
Abstract: A coil spring guide, for use in connection with the insertion of a catheter into the vessels of a body, that has a coil spring, and a wire core extending within the coil spring and having a distal end welded to the distal end of the coil spring. The coil spring is made from metal wire that in a straightened condition is circular in transverse cross section throughout its length, and that after being coiled, to have adjacent helics abut against one another. Thereafter the radially outer circumferential portion of the coil is ground away to provide a helical radially outer spring coil surface (chordal surface) that is of a substantially constant radius throughout the axial length of the coiled wire and has a helix width of a chord parallel to the central longitudinal axis of the coil spring that is subtended by about a 10.degree.-140.degree. angle of two radii of the coil spring wire.
June 20, 1975
Date of Patent:
August 10, 1976
Lake Region Manufacturing Company, Inc.
John J. Fleischhacker, Joseph F. Fleischhacker, Jr.