Blood treating system

• US 4,243,532 A
• Filed: 12/13/1978
• Issued: 01/06/1981
• Est. Priority Date: 09/26/1975
• Status: Expired due to Term

• Current Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
• Original Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
• Inventors: Inagaki, Kenji, Kominami, Naoya, Tsuda, Nobuaki, Imamiya, Tamotsu
• Primary Examiner(s): Spear, Jr., Frank A.
• Application Number:
  US05/968,914
• Time in Patent Office: 755 Days
• Field of Search: 210/23 F, 210/27, 210/434, 210/196, 210/321 B, 210/321 A, 210/321 R, 210/DIG. 23, 210/502, 128/214 R
• US Class Current: 210/196
• CPC Class Codes: A61M 1/3434 with pre-dilution and post-dilution
• CPC Class Codes: A61M 1/3437 downstream of the filter, e.g. post-dilution with filtrate
• CPC Class Codes: A61M 1/3468 using treated filtrate as substitution fluid
• CPC Class Codes: A61M 1/3472 with treatment of the filtrate
• CPC Class Codes: A61M 1/3486 Biological, chemical treatment, e.g. chemical precipitation; treatment by absorbents

Abstract

A blood-treating system in which apparatus for the purification of blood by purifying blood plasma, is provided. The system includes as principal elements, an apparatus for separating blood plasma by way of a membrane, an apparatus for purifying blood plasma and an apparatus for mixing blood with blood plasma to be placed between a blood-introducing portion and a purified blood-withdrawing portion of the system. This system can remove useless substances from blood with a high efficiency without damaging and reducing blood cell components or any fear of mixing of the fine powder in the purifying agent.

Claims

1. A blood treating system having a path for causing blood to flow formed in series comprising a blood introducing part;

an element for mixing blood with blood plasma;

a blood plasma-separating element having a porous membrane which passes blood plasma in blood but does not pass any blood corpuscle therein;

an element for mixing the resulting concentrated blood with blood plasma; and

a purified blood-withdrawing portion in the system;

and also a path for causing blood plasma to flow comprising means for transporting blood plasma separated in said blood plasma-separating element comprising a pump;

means for purifying blood plasma separated in said blood plasma-separating element and having at its inlet and exit, a filter having a purifying agent for removing unnecessary substances in blood plasma, filled therein and capable of preventing the purifying agent from flowing out; and

a three-way cock, said path for blood plasma to flow being formed between said blood plasma-separating element, said element for mixing blood with blood plasma, and said element for mixing the resulting concentrated blood with blood plasma and is so constructed that blood plasma separated in said blood plasma-separating element and purified in said means for purifying blood plasma can be sent optionally to either of said element for mixing blood with blood plasma or said element for mixing the resulting concentrated blood with blood plasma.

2. A blood treating system according to claim 1 wherein said porous membrane is hollow fiber.

3. A blood treating system according to claim 2 wherein said hollow fibers are made of cellulose acetate.

5. A blood treating system according to one of claims 1 or 4 wherein said blood plasma-separating element contains porous artificial membrane having a size of 1μ

-80 A.

6. A blood treating system according to one of claims 1 or 4 wherein said means for purifying is filled with active carbon.

7. A blood treating system according to one of claims 1 or 4 wherein said means for purifying is provided with porous filter having a pore size of 1,000μ

-0.05μ

.

4. A blood treating system having a path for causing blood to flow formed in series comprising a blood introducing part;

an element for mixing blood with blood plasma;

a blood plasma-separating element having a porous membrane which passes blood plasma in blood but does not pass any blood corpuscle therein;

and a purified blood-withdrawing portion in the system;

and also a path for causing blood plasma to flow comprising means for transporting blood plasma separated in said blood plasma-separating element comprising a pump; and

means for purifying blood plasma separated in said blood plasma-separating element and having at its inlet and exit a filter having a purifying agent for removing unnecessary substances in blood plasma, filled therein and capable of preventing the purifying agent from flowing out, said path for blood plasma to flow being formed between said blood plasma-separating element and said element for mixing blood with blood plasma, and is so constructed that blood plasma separated in said blood plasma-separating element and purified in said means for purifying blood plasma can be again mixed with blood prior to the separation of blood plasma in said element for mixing blood with blood plasma.