Miniature ultrasonic transducer for removal of intravascular plaque and clots
US5431663A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1993 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | Dec 8, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/22021
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Ultrasonic apparatus for clot dissolution and plaque ablation includes a radiator for coupling ultrasonic waves into plaque and a piezoelectric crystal, connected with said radiator, for the intravascular generation of ultrasonic waves; said ultrasonic waves being propagated along a longitudinal axis of said piezoelectric crystal and having an inertial node position within said piezoelectric crystal. The piezoelectric crystal is constructed in order to prevent significant power loss caused by a shifting of the inertial node of the generated ultrasonic waves to a position exterior to said piezoelectric crystal due to loading of the radiator-means caused by the coupling of ultrasonic waves into the clot or plaque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.