Combination ultrasonic and electrosurgical instrument having ultrasonic waveguide with distal overmold member
US11051866B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2018 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | Oct 20, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/0803
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A surgical instrument includes an ultrasonic transducer, a shaft extending distally along a shaft axis, a waveguide acoustically coupled with the ultrasonic transducer and extending distally through the shaft, and an end effector at a distal end of the shaft. The end effector includes an ultrasonic blade acoustically coupled with the waveguide. A nodal support element is arranged within a distal portion of the shaft and encircles the waveguide at a distal-most acoustic node of the waveguide. The nodal support element includes a support portion aligned with the distal-most acoustic node, and a sealing portion extending axially from the support portion. The support portion engages an inner surface of the shaft and is configured to support the waveguide in coaxial alignment with the shaft axis. The sealing portion sealingly engages the inner surface of the shaft and is configured to prevent proximal ingress of fluid through the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.