A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/126
A61M 29/02 (2006.01) A61M 25/01 (2006.01)
Patent
CA 1308988
MICRODILATATION PROBE AND SYSTEM FOR PERFORMING ANGIOPLASTY IN HIGHLY STENOSED BLOOD VESSELS ABSTRACT OF THE DISCLOSURE A balloon angioplasty system includes a balloon dilatation catheter having an inflation and deflation lumen for the balloon and a main lumen extending the full length of the catheter to provide fluid communication from the proximal to the distal end of the catheter. A microdilatation probe has a small diameter and can be passed through the main lumen of the dilatation catheter. The microdilatation probe has a balloon at its distal end which is collapsible to enable it to be passed through the main lumen of the dilatation catheter so that it can be projected distally beyond the distal tip of the dilatation catheter. The probe balloon is inflatable to a diameter no smaller than the diameter of the uninflated dilatation catheter. The probe and dilatation catheter are constructed so that fluid communication is maintained through the main lumen of the dilatation catheter while the microdilatation probe extends through the catheter thereby enabling liquids to be infused and pressure measurements to be taken while the probe is in place. The probe may include a distal tip which can hold a preset curve. The probe is sufficiently rigid to enable the transmission of torque to the distal end to permit steering of the probe by controllably rotating the proximal end of the probe. In use, a stenosis which cannot be crossed by the dilatation catheter may be enlarged sufficiently to permit passage of the dilatation catheter by first projecting the dilatation probe into the stenosis, then inflating the probe balloon to enlarge the lumen of the stenosis sufficiently to thereafter receive the dilatation catheter.
508315
Crittenden James F.
Frassica James J.
C.r. Bard Inc.
Swabey Ogilvy Renault
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