Bifurcated venous cannula
US6086557A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1998 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Oct 1, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/1045
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A cannula for draining blood from a patient's heart during cardiac surgery including a main body and a pair of branches extending distally therefrom. The branches are biased to extend away from one another by pre-shaped stiffening elements, and have "D" shaped cross-sections defining flat surfaces oriented generally towards one another. The branches may be constrained in a retracted position, the flat surfaces abutting one another, and the resulting profile forming a substantially continuous extension of the main body. The branches have distal tips including drainage holes and occlusion balloons, and elbow portions including accordion-like ridges for preventing kinking. Grooves in the flat surfaces define a secondary lumen in the retracted position through which a cardioplegia delivery or an imaging device may be advanced. The cannula is directed into a trocar to constrain the branches in the retracted position, and the trocar is inserted into the right atrium. The trocar is withdrawn to deploy the branches, which automatically extend away from one another, assuming a tripartite configuration wherein the branches extend substantially transversely from the main body, and enter the s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.