Claims
- 1. A method for the extracorporeal treatment of blood comprising the steps of:
- providing a circuit without a drip chamber for carrying blood to which substantially no anticoagulant has been added from a patient and returning the blood to the patient without substantial contact of the blood with air;
- dialyzing blood within said circuit with an ethylenevinyl alcohol copolymer hollow fiber dialyzer;
- passing the blood within said circuit through a tubular blood passageway member in series with said dialyzer, at least part of which is made of a flexible material;
- hermetically enclosing the tubular blood passageway member within an outer tubular member made of a nonflexible material;
- filling the hermetically closed space between the outside surface of said tubular blood passageway member and said outer tubular member with a fluid; and
- detecting changes in the pressure of said fluid caused by inflations and deflations of the flexible portion of the tubular blood passageway produced by changes in the pressure of the blood passing therethrough.
- 2. The method of claim 1 including the additional step of filtering the blood.
- 3. The method of claim 2 wherein the filtering is done with a filter having a filter surface made of a bubble-repelling material.
- 4. The method of claim 3 wherein the bubble-repelling material is a hydrophilic polymer, the angle of receding contact of water with said polymer being not more than 45.degree..
- 5. The method of claim 2 wherein the filtering is done with a built-in filter integrated with the tubular body fluid passageway.
- 6. The method of claim 3 wherein the filtering is done with a built-in filter integrated with the tubular blood passageway.
- 7. The method of claim 4 wherein the filtering is done with a built-in filter integrated with the tubular body fluid passageway.
Priority Claims (2)
Number |
Date |
Country |
Kind |
56-55667[U] |
Apr 1981 |
JPX |
|
56-99643[U] |
Jul 1981 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 528,234, filed Aug. 30, 1983 which in turn is a continuation of application Ser. No. 366,919 filed Apr. 9, 1982, both now abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
50-683 |
Jan 1975 |
JPX |
Non-Patent Literature Citations (3)
Entry |
Anno, Gousuki and Hidai, Hideo; "Transmembrane Pressure Stabilizer For Haemodialysis", Biomedical Engineering, Jan. 1976. |
Naito, H., Miyazaki, T., Shimizu, N. and Yoneda, K., "Non-Anticoagulant Hemodialysis with Synthetic EVAL HFAK", Konan Hospital, Kobe, Japan. |
Miyazaki, Tetuo et al., "Blood Line for Non-Anticoagulant Hemodialysis", 2/11/1982. |
Continuations (2)
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Number |
Date |
Country |
Parent |
528234 |
Aug 1983 |
|
Parent |
366919 |
Apr 1982 |
|