Cannula purse string suture clamping device
US5911728A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/3419
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Several embodiments of a clamping device are disclosed, for tightening and securing a purse string suture used to seal the tissue around a cannula or a catheter or the like placed in a heart, major vessel or other tissue structure. The clamping device includes a compressible sleeve means solidly secured at a proximal end to a compression-applying means such as a clamp mechanism. A suture-pulling needle is inserted through a common lumen, whereby the trailing ends of the suture thread which forms the purse string suture may be pulled through the compressible sleeve means and clamp mechanism. Application of a force to the clamp mechanism while it is not locked to the trailing ends compresses the compressible sleeve means. Release of the clamp mechanism locks the enclosed trailing ends of the suture thread. The compressed sleeve means applies constant and precalibrated tension on the purse string suture to continuously maintain the seal about the cannula. The clamping device is removed by unlocking the clamp mechanism and withdrawing the device from the suture thread.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.