US Patent 7618406 Break seal before access dual chamber bag

A multiple chamber medical fluid bag including: (i) a flexible enclosure; (ii) a first fluid chamber formed in the enclosure; (iii) a second fluid chamber formed in the enclosure; (iv) the first fluid chamber and the second fluid chamber separated by a frangible seal; and (v) an access port connected to the enclosure, the enclosure folded so as to cover the access port and so that the frangible seal is broken to uncover the access port.