Apparatus and methods for controlling mixtures of blood and cardioplegia
US5358481A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1993 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Jun 3, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/366
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Methods and apparatus are disclosed for variably controlling the ratio of blood to cardioplegia solution to be administered to a patient. A presently preferred embodiment of the apparatus of the invention comprises a multilumen tubing member having a blood supply lumen and three cardioplegia supply lumens, each having approximately the same tubing wall thickness, but having different inside diameters so that causing flow through different combinations of the cardioplegia lumens will result in different ratios of blood to cardioplegia. The four tubes comprising the multilumen tubing member are advantageously connected by web members, thereby facilitating use with a roller pump and minimizing the tangle of tubes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.