United States Patent m tm Patent Number: 5,630,823
Schmitz-Rode et al.  Date of Patent: May 20, 1997
 APPARATUS FOR FRAGMENTATION OF A LUNG OR HEART EMBOLUS
 Inventors: Thomas Schmitz-Rode; Rolf W.
Giinther. both of Aachen, Germany
 Assignee: William Cook Europe A/S, Bjaeverskov, Denmark
 Appl. No.: 459,272
 Filed: Jun. 2,1995
 Foreign Application Priority Data
Jun. 17, 1994 [DE] Germany 9409863 U
 Int CI.6 A61B 17/22
 U.S. CI 606/128; 6067159; 604/281;
 Field of Search 606/128, 127,
606/108, 159, 106; 604/280, 281, 164, 95; 128/772
 References Cited
U.S. PATENT DOCUMENTS
1,207,479 12/1916 Bisgaard 604/95
4,405,314 9/1983 Cope 604/281
4,740,195 4/1988 Lanciano 604/95
4,747,840 5/1988 Ladikaetal 604/281
5,037,403 8/1991 Garcia 604/281
5,312,357 5/1994 Buijs et al 604/164
5,330,484 7/1994 Giither et al. .
5,352,198 10/1994 Goldenberg et al 604/95
FOREIGN PATENT DOCUMENTS
0549458 6/1993 European Pat. Off. .
Method and apparatus for fragmentation of a lung embolus. The apparatus includes a catheter that is introduced over a guide wire to the site of the lung embolism in the vascular system of a patient. When the guide wire is withdrawn from the distal end segment of the catheter, the distal end segment bends back proximally. An opening in the bend of the catheter is in line with the central axis of the catheter when the distal end segment is in a curved configuration. The guide wire is then advanced to extend distally from the catheter opening past the embolism and stabilize the longitudinal position of the catheter in the blood vessel. The apparatus also includes a thread for pulling the bent distal end segment into a generally oval-shaped loop condition and stabilizing the loop about the embolism. The looped catheter is then rotated and moved longitudinally back and forth for mechanically destroying the embolism. To return the catheter to a straight condition, the rigid guide wire is withdrawn from the catheter, and a guide wire with a resilient J-tip is advanced to the distal end segment of the catheter. The J-tip guide wire follows the catheter past the catheter opening, thereby straightening the catheter for removal from the body. The apparatus optionally includes a handle or motor positioned at the proximal end of the apparatus.
14 Claims, 4 Drawing Sheets