Method and apparatus for controlling the circulation of blood in a single needle circuit
US5318511A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1992 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Feb 5, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3386
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A single needle extracorporeal blood circuit for connection to a blood treatment device includes an arterial portion having an arterial reservoir, an end for connection to the needle, an end for connection to the blood treatment device, and a first valve for flow communicating the needle with the arterial reservoir. The blood circuit also includes a venous portion having a venous reservoir, an end for connection to the blood treatment device, an end for connection to the needle, and a second valve for flow communicating the needle with the venous reservoir. Detectors monitor quantities of liquid in the arterial and venous reservoirs so that the first valve is opened in response to the presence of a first predetermined quantity of liquid in the arterial reservoir or a second predetermined quantity of liquid in the venous reservoir. Similarly, the second valve is opened in response to the presence of either a third predetermined quantity of liquid in the arterial reservoir or a fourth predetermined quantity of liquid in the venous reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.