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Airless artificial kidney assembly

  • US 4,412,916 A
  • Filed: 06/24/1981
  • Issued: 11/01/1983
  • Est. Priority Date: 06/24/1981
  • Status: Expired due to Term
First Claim
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1. An airless artificial kidney assembly comprising(1) an artificial kidney having inlet and outlet ports,(2) a liquid-tight subassembly having a filter, microporous vent means for venting to atmosphere gas bubbles separated from liquid in said subassembly and preventing gas entry through said vent means into said subassembly, pressure measuring means for continuously monitoring the pressure of liquid in said subassembly, a housing for blood having an upper region and an outlet connector communicating with said housing for discharging blood therefrom,(3) a first tube secured at one end to said kidney inlet port and terminating at its opposite end in a connector for connecting said first tube with a patient,(4) a second tube secured at one end to said outlet connector of said subassembly and terminating at its opposite end in a connector for connecting said second tube with a patient,(5) said kidney outlet port opening into said housing for discharging blood thereinto,said filter being arranged for filtering blood flowing from said kidney outlet port to said outlet connector, said vent means comprising an upwardly opening microporous hydrophobic vent in communication with said upper region of said housing for receiving and discharging air bubbles therefrom, and means containing an aqueous solution overlying said vent for preventing downward flow of air through said vent into said housing.

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