Method of treating blood during operative procedures

• US 4,299,705 A
• Filed: 09/07/1979
• Issued: 11/10/1981
• Est. Priority Date: 09/07/1979
• Status: Expired due to Term

• Current Assignee: Richard T. Russell
• Original Assignee: Richard T. Russell
• Inventors: Russell, Richard T.
• Primary Examiner(s): Spear, Jr., Frank A.
• Application Number:
  US06/073,189
• Time in Patent Office: 795 Days
• Field of Search: 422/47, 422/48, 128/214 C, 128/214 F, 128/DIG. 3, 128/214 B, 128/214 E, 210/22 A, 210/22 R, 210/22 C, 210/188, 210/321 B, 210/646, 210/647
• US Class Current: 210/647
• CPC Class Codes: A61M 1/32 Oxygenators without membranes
• CPC Class Codes: A61M 1/34 Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration or diafiltration
• CPC Class Codes: A61M 1/3621 Extra-corporeal blood circuits single-needle circuits A61M1/30
• CPC Class Codes: A61M 1/3643 Priming, rinsing before or after use
• CPC Class Codes: A61M 1/3644 Mode of operation
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: Y10S 210/929 Hemoultrafiltrate volume measurement or control processes

Abstract

This invention is a method for separating blood from other fluids added to the blood in connection with operative procedures. It is particularly exemplified by bypassing a portion of the blood during surgery through an artificial kidney apparatus or the like in conjunction with the oxygenation, simultaneously, of all blood, including that bypassed through the artificial kidney, wherein the excess fluids other than blood are removed for all practical purposes by completion of the operative procedure.

Claims

1. The method for removing foreign fluids from blood during operative procedures including:

(1) passing blood mixed with fluids from a patient'"'"'s body through a bubble oxygenator;

(2) dividing the mixture of blood and fluid so as to return a first portion to the patient'"'"'s body and divert a second portion to an artificial membrane kidney;

(3) collecting the filtrate which is not blood from the artificial membrane kidney; and

(4) returning the second portion less the filtrate to the bubble oxygenator.

2. The method of claim 1 wherein prior to introducing the mixture of blood and fluid to the bubble oxygenator a controlled quantity of fluid is mixed with the patient'"'"'s blood and wherein the amount of filtrate is controlled so as to remove the approximate exact amount of fluid from the blood by termination of the procedure as was introduced prior to commencement of the procedure.

3. The method of claim 1 wherein the second portion of the blood which is diverted to the artificial membrane kidney is removed from the arterial reservoir of the bubble oxygenator through the coronary perfusion outlet.