Punch for opening passages between two compartments
US5403338A · kind A · utility
246Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1993 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Jan 21, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/349
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A punch for opening passages between two compartments comprises an outer hollow tube and an inner needle tube. The outer hollow tube has a sharp distal edge constituting a circular knife. The needle tube is provided with screw actuating member at a proximal end thereof and a bevelled tip at a distal end thereof. A screw mechanism is located upon a distal end of the needle tube, and the screw mechanism is connected to a cutting disc. The mechanism is screw-actuated by the actuating member. The punch is particularly suitable in cardiac surgery and cardiology as a cardiac catheter and in opening the inter-atrial septum of babies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.