Intravascular ultrasonic catheter/probe and method for treating intravascular blockage
US4870953A · kind A · utility
Inventors
Key dates
| Filing date | Nov 13, 1987 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Nov 13, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/1052
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatus and method are disclosed for treating atherosclerotic plaque and thromboses by the application of ultrasonic energy to a site of intravascular blockage. The ultrasonic apparatus includes a solid wire probe having a bulbous tip at one end and coupled to an ultrasonic energy source at the other end, the probe being carried within a hollow catheter. The catheter and probe are inserted into a blood vessel and are advanced to the site of a stenosis, where the probe is extended from the catheter and caused to vibrate ultrasonically, resulting in the destruction of the arterial plaque. The ultrasonic apparatus includes a fitting for delivering a radiographic contrast solution to the probe tip by flowing the solution into the catheter, the contrast fluid being released into the blood vessel to assist in positioning the apparatus and determining the effectiveness of treatment. A physiologic solution may also be carried to the probe tip by flowing the solution through the catheter, thereby controlling the temperature of the probe tip during the procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.