Thermostabilizer for extracorporeal oxygenator

• US 3,374,066 A
• Filed: 06/15/1964
• Issued: 03/19/1968
• Est. Priority Date: 06/15/1964
• Status: Expired due to Term

• Current Assignee: William E. Farrant
• Original Assignee: William E. Farrant
• Inventors: Farrant, William E.
• Application Number:
  US04/375,236
• Time in Patent Office: 1,373 Days
• US Class Current: 422/47
• CPC Class Codes: A61M 2205/366 by liquid heat exchangers
• CPC Class Codes: A61M 5/44 having means for cooling or heating the devices or media

Claims

1. IN AN OXYGENATOR PROVIDED WITH A BLOOD INLET TUBE AND A BLOOD OUTLET TUBE, A THERMOSTABILIZER HAVING A BLOOD CONDUIT PORTION AND A HEAT EXCHANGE PORTION ASSOCIAITED WITH THE BLOOD CONDUIT PORTION TO CONTROL THE TEMPERATURE OF THE BLOOD PASSING THERETHROUGH, SAID BLOOD CONDUIT PORTION COUPLED AT OPPOSITE ENDS WITHIN ONE OF THE BLOOD TUBES OF THE OXYGENATOR FORMING A BLOOD PASSAGEWAY PORTION THEREOF, SAID BLOOD CONDUIT PORTION HAVING AN INTERNAL BLOOD CONTAINING VOLUME PER UNIT OF LENGTH EQUAL TO THE INTERNAL BLOOD CONTAINING VOLUME PER THE SAME UNIT OF LENGTH OF THE BLOOD TUBE OF THE OXYGENATOR WITHIN WHICH SAID BLOOD CONDUIT PORTION IS COUPLED AND HAVING AN INTERNAL SURFACE PER THE SAME UNIT OF LENGTH AND OVER WHICH THE BLOOD PASES THERETHROUGH SUBSTANTIALLY GREATER IN AREA THAN THE INTERNAL SURFACE PER THE SAME UNIT OF LENGTH OF THE BLOOD TUBE OVER WHICH THE BLOOD PASSES AND WITHIN WHICH SAID BLOOD CONDUIT IS COUPLED

4. IN AN OXYGENATOR HAVING A BLOOD TUBE ADAPTED TO BE CONNECTED WITH A PATIENT TO ESTABLISH BLOOD COMMUNICATION BETWEEN THE OXYGENATOR AND THE PATIENT, A THERMOSTABILIZER HAVING A BLOOD CONDUIT PORTION AND A HEAT EXCHANGE PORTION, SAID HEAT EXCHANGE PORTION SURROUNDING THE BLOOD CONDUIT PORTION TO CONTROL THE TEMPERATURE OF THE BLOOD PASSING THERETHROUGH, SAID BLOOD CONDUIT PORTION COUPLED AT OPPOSITE ENDS WITHIN SAID BLOOD TYBE TO FORM A BLOOD COMMUNICATING PORTION OF SAID TUBE, SAID BLOOD CONDUIT HAVING AN INTERNAL BLOOD CONTAINING VOLUME PER UNIT OF LENGTH EQUAL TO THE INTERNAL BLOOD CONTAINING VOLUME PER THE SAME UNIT OF LENGTH OF THE BLOOD TUBE WITHIN WHICH THE BLOOD CONDUIT IS COUPLED, SAID BLOOD CONDUIT PORTION BEING REMOVABLY REPLACEABLE WITHIN THE SURROUNDING HEAT EXCHANGE PORTION OF THE THERMOSTABILIZER WHEREBY IT MAY BE REMOVED THEREFROM AND ANOTHER BLOOD CONDUIT PORTION INSERTED THEREIN.