Medtronic, Inc.

Sharon Schwab

Don H Tran

Glen L Lieber

Maritess E Minas

Morris H Deitermann

Jeffrey S Trinidad

Leslie Le

Michael P Brose

Maria D Amores

A spiral balloon perfusion catheter assembly having a retaining wire and method of making the balloon. Also, a retaining wire for such a catheter and method of forming the retaining wire. A typical spiral catheter balloon has a spiral configuration of lobes and channels mounted on a catheter extending beyond the balloon ends. A retaining wire formed from a shape memory alloy is configured to have a central region having a spaced spiral configuration conforming to the spiral balloon channel and end regions configured to have a contiguous spiral configuration conforming to the catheter diameter. When placed over a spiral balloon, the central spiral region prevents expansion of the channel when the balloon is inflated, while the end regions secure the retaining wire to the catheter. Preferred shape memory alloys comprise nickel and titanium. The retaining wire is made by heating the wire above the crystal phase change temperature of the alloy, shaping the spirals then cooling the product below the crystal phase change temperature. The spiral end regions may be unwound and placed over the catheter adjacent to the balloon with the wire in the central spiral region conforming to the balloon channel.

Spiral sheath retainer for autoperfusion dilatation catheter balloon

A medical catheter comprising a catheter shaft defining an inflation lumen and a guidewire shaft defining a guidewire lumen. The guidewire shaft is coaxial with the catheter shaft and runs longitudinally through the catheter shaft extending distally beyond the distal end of the catheter shaft. The catheter has an inflatable balloon having a proximal tail and a distal tail. The proximal tail is mounted at the distal end of the catheter shaft, the distal tail is mounted on the guidewire shaft. The balloon is in fluid communication with the inflation lumen. A distal stopper is sealingly affixed between the outer diameter of the guidewire shaft and the inner diameter of the distal tail. A proximal stopper is sealingly affixed between the outer diameter of the catheter shaft and the inner diameter of the proximal tail. The distal and proximal stopper are annular in shape and are in length shorter than the balloon tail and are of uniform circumferential thickness. An adhesive seals a portion of the tails to the catheter shaft.

Catheter balloon bonding stopper

Disclosed is a medical catheter comprising a guidewire shaft defining a guidewire lumen. A distal tip extension defines a distal tip extension lumen having at a proximal end thereof a distal end of the guidewire shaft sealingly affixed therein. The inflatable balloon has a body portion, a tail portion and a cone shaped portion. The cone-shaped portion extends between the distal end of the body portion and the proximal end of the tail portion. The balloon tail portion is sealingly affixed to the distal tip extension such that the proximal end of the distal tip extension extends proximally from the proximal end of the balloon tail portion, the distal end of the distal tip extension extends distally from the distal end of the balloon tail and the distal end of the guidewire shaft is in alignment with the proximal end of the balloon tail portion.

Catheter distal tip component

A sheath arrangement for spiral balloon catheters which permits improved perfusion during dilation of a body vessel. Methods of making the sheath and assembling the sheath onto a balloon and the resulting sheathed balloon catheter are included. A tube sized to fit over a spiral balloon is cut, preferably by laser cutting, to form ribs extending from the tube ends with collars at the distal ends of the ribs. Preferably, the tube ends are trimmed to match the balloon spiral lobes. The sheath is placed over the spiral balloon, bonded to the balloon lobes. The collars are secured to the catheter adjacent to the balloon. When the balloon is expanded to dilate a body vessel, blood can freely pass through the interlobe channels while the sheath prevents entry of arterial intima from entering into the channels. The rib and collar arrangement securely maintains the sheath in place on the balloon.

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San Diego, CA, United States of America

Sharon Schwab