Surgical puncture access with preload lock
US8894679B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2012 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Nov 9, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/3454
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A surgical device mitigates over-puncture with a bias spring that biases a leading, cutting edge in the opposite direction of the anticipated over-puncture. An associated locking mechanism is configured to release the force of the bias spring in a direction counter to the direction of insertion when the tension force of tissue against the cutting edge is released. Thus, when an opening in the tissue forms, the tension is released and the cutting edge can move opposite to the direction of insertion of the surgical device at the same time that an applied force drives the instrument in the direction of insertion. In this manner, the spring and locking mechanism cooperate to move the cutting edge opposite to the direction of insertion as soon as an incision is made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.