Multi-purpose blood bag

US4040959A · kind A · utility

Inventors

• Irwin R. Berman · Saint Simons Island, US
• Ira M. Nathan · New York, US

Key dates

• Filing date: Jun 22, 1976
• Grant date: Aug 9, 1977
• Expiry date: Jun 22, 1996

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61J1/2034
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A bag for the separation of components in blood by gravitational settlement or centrifugation, has an upper chamber and a lower chamber connected by a slender neck, there being access conduits to each of said chambers and said neck. The bag is so dimensioned that for blood having a normal hematocrit the interfaces between packed red cells and the buffy coat and between the buffy coat and the plasma will lie within the neck. The neck can then be clamped off or otherwise sealed to separate the phases sharply and to permit virtually 100% recovery of the plasma and the packed red cells. In a second embodiment, the buffy coat can be isolated and seals within the system opened to permit intermixing of the plasma and the packed red blood cells under completely sterile conditions. A special support makes it possible for the blood bag to be subjected without distortion to centrifugation.