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Gas exchange apparatus

  • US 4,228,125 A
  • Filed: 06/20/1978
  • Issued: 10/14/1980
  • Est. Priority Date: 06/20/1978
  • Status: Expired due to Term
First Claim
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1. A blood oxygenator comprisingfoaming means for bubbling gas into blood to form a foam composed of bubbles, each bubble having a wall formed of said blood,heat and gas exchanging means located downstream of said foaming means, said heat and gas exchanging means comprisinga heat-conductive corrugated sheet having first and second opposing surfaces,a housing adjacent said first opposing surface and defining therebetween a chamber for passing heat-transfer fluid along said first surface, said housing having an inlet for connection to a heat-transfer fluid source and an outlet for removing said heat-transfer fluid from said chamber, the flow through said chamber being isolated from said second opposing surface, anda wall surface adjacent to said second opposing surface, said wall surface and said second surface defining a plurality of passages corresponding to the corrugations in said sheet, said passages distributing said foam into a corresponding plurality of streams and providing locations for simultaneousheat transfer between said fluid and said foam andgas transfer between said gas and said blood at the walls of said bubbles, anddefoaming means located downstream of said heat and gas exchanging means for breaking up said bubbles.

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