FR2390173A1 - INTEGRATED HYDRAULIC CIRCUIT FOR HEMODIALYSIS UNIT - Google Patents

INTEGRATED HYDRAULIC CIRCUIT FOR HEMODIALYSIS UNIT

Info

Publication number
FR2390173A1
FR2390173A1 FR7811920A FR7811920A FR2390173A1 FR 2390173 A1 FR2390173 A1 FR 2390173A1 FR 7811920 A FR7811920 A FR 7811920A FR 7811920 A FR7811920 A FR 7811920A FR 2390173 A1 FR2390173 A1 FR 2390173A1
Authority
FR
France
Prior art keywords
connects
hydraulic circuit
integrated hydraulic
hemodialysis unit
orifice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7811920A
Other languages
French (fr)
Inventor
Marc Bellotti
Richard P Goldhaber
Earl G Phillips
Theodore H Toch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baxter International Inc
Original Assignee
Baxter Travenol Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baxter Travenol Laboratories Inc filed Critical Baxter Travenol Laboratories Inc
Publication of FR2390173A1 publication Critical patent/FR2390173A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3639—Blood pressure control, pressure transducers specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/34—Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration or diafiltration
    • A61M1/342—Adding solutions to the blood, e.g. substitution solutions
    • A61M1/3424—Substitution fluid path
    • A61M1/3431—Substitution fluid path upstream of the filter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3622—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit
    • A61M1/36224—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit with sensing means or components thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3622—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit
    • A61M1/36226—Constructional details of cassettes, e.g. specific details on material or shape
    • A61M1/362261—Constructional details of cassettes, e.g. specific details on material or shape at least one cassette surface or portion thereof being flexible, e.g. the cassette having a rigid base portion with preformed channels and being covered with a foil
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3622—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit
    • A61M1/36226—Constructional details of cassettes, e.g. specific details on material or shape
    • A61M1/362262—Details of incorporated reservoirs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3622—Extra-corporeal blood circuits with a cassette forming partially or totally the blood circuit
    • A61M1/36226—Constructional details of cassettes, e.g. specific details on material or shape
    • A61M1/362263—Details of incorporated filters
    • A61M1/362264—Details of incorporated filters the filter being a blood filter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3639—Blood pressure control, pressure transducers specially adapted therefor
    • A61M1/3641—Pressure isolators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/12—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/12—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit
    • A61M2205/125—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit with incorporated filters

Landscapes

  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Cardiology (AREA)
  • External Artificial Organs (AREA)

Abstract

Le circuit comprend une pièce unitaire rigide 18 délimitant trois chambres 12, 14, 16, un orifice 24 qui se raccorde par un tuyau 26 au système veineux du patient, un orifice 34 qui se raccorde à la sortie 36 d'un dialyseur à sang 38, un troisième orifice 40 qui se raccorde par un tuyau 42 au système artériel du patient, un orifice 54 qui se raccorde au tuyau 56 d'une pompe à sang, un orifice 62 qui se raccorde lui aussi au tuyau de la pompe à sang, et un orifice 64 qui se raccorde à l'entrée 66 du dialyseur.The circuit comprises a rigid unitary part 18 delimiting three chambers 12, 14, 16, an orifice 24 which is connected by a pipe 26 to the venous system of the patient, an orifice 34 which connects to the outlet 36 of a blood dialyzer 38 , a third port 40 which connects via a tube 42 to the patient's arterial system, an port 54 which connects to the tube 56 of a blood pump, an port 62 which also connects to the tube of the blood pump, and an orifice 64 which connects to the inlet 66 of the dialyzer.

FR7811920A 1977-05-09 1978-04-21 INTEGRATED HYDRAULIC CIRCUIT FOR HEMODIALYSIS UNIT Withdrawn FR2390173A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79475577A 1977-05-09 1977-05-09

Publications (1)

Publication Number Publication Date
FR2390173A1 true FR2390173A1 (en) 1978-12-08

Family

ID=25163583

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7811920A Withdrawn FR2390173A1 (en) 1977-05-09 1978-04-21 INTEGRATED HYDRAULIC CIRCUIT FOR HEMODIALYSIS UNIT

Country Status (5)

Country Link
JP (1) JPS53139399A (en)
CA (1) CA1104032A (en)
DE (1) DE2820256A1 (en)
FR (1) FR2390173A1 (en)
GB (2) GB1601856A (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0611228A2 (en) * 1993-02-12 1994-08-17 Hospal Industrie Technique for extracorporeal treatment of blood
EP0611227A1 (en) * 1993-02-12 1994-08-17 Hospal Industrie Integrated blood treatment fluid module
WO1996040322A2 (en) * 1995-06-07 1996-12-19 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
EP0800838A2 (en) * 1992-04-30 1997-10-15 Medisystems Technology Corporation Hemodialysis apparatus with upright U-shaped pump tubing
US5702357A (en) * 1995-06-07 1997-12-30 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US5720716A (en) * 1995-06-07 1998-02-24 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US5722946A (en) * 1995-06-07 1998-03-03 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US5750025A (en) * 1995-06-07 1998-05-12 Cobe Laboratories, Inc. Disposable for an apheresis system with a contoured support
US5795317A (en) * 1995-06-07 1998-08-18 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US5837150A (en) * 1995-06-07 1998-11-17 Cobe Laboratories, Inc. Extracorporeal blood processing methods
US5919154A (en) * 1995-06-07 1999-07-06 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US6179801B1 (en) 1995-06-07 2001-01-30 Gambro, Inc. Extracorporeal blood processing methods and apparatus
US6200287B1 (en) 1997-09-05 2001-03-13 Gambro, Inc. Extracorporeal blood processing methods and apparatus
US6730055B2 (en) 2000-03-09 2004-05-04 Gambro Inc. Extracorporeal blood processing methods and apparatus
US6994781B2 (en) 2000-07-07 2006-02-07 Baxter International Inc. Medical system, method and apparatus employing MEMS
US7108672B2 (en) 1995-06-07 2006-09-19 Gambro Inc Extracorporeal blood processing methods and apparatus
US7744553B2 (en) 2003-12-16 2010-06-29 Baxter International Inc. Medical fluid therapy flow control systems and methods
US9733805B2 (en) 2012-06-26 2017-08-15 Terumo Bct, Inc. Generating procedures for entering data prior to separating a liquid into components

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE451541B (en) * 1983-06-30 1987-10-19 Gambro Lundia Ab EXTRACORPORAL BLOOD TREATMENT SYSTEM
JPS6079436U (en) * 1983-11-04 1985-06-03 川澄化学工業株式会社 extracorporeal circulation circuit
JPS61113461A (en) * 1984-11-06 1986-05-31 鐘淵化学工業株式会社 Circuit body for treating blood component
JPH04845Y2 (en) * 1986-12-29 1992-01-13
DE10224750A1 (en) * 2002-06-04 2003-12-24 Fresenius Medical Care De Gmbh Device for the treatment of a medical fluid
US7223336B2 (en) 2003-02-07 2007-05-29 Gambro Lundia Ab Integrated blood treatment module and extracorporeal blood treatment apparatus
WO2006120415A1 (en) * 2005-05-06 2006-11-16 Imi Vision Limited Dialysis machine
JP4549229B2 (en) * 2005-05-11 2010-09-22 Ｊｕｎｋｅｎ Ｍｅｄｉｃａｌ株式会社 Blood purification system
US9610392B2 (en) 2012-06-08 2017-04-04 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3550619A (en) * 1968-06-21 1970-12-29 Becton Dickinson Co Tubing holder
DE2055281A1 (en) * 1969-11-17 1971-06-03 CCI Aerospace Corp , Van Nuys, Calif (V St A) Disposable dialyzer
DE2121740A1 (en) * 1970-05-04 1971-12-02 Danske Sukkerfab Pressure transducer
FR2179980A1 (en) * 1972-04-11 1973-11-23 Nycotron As
FR2258190A1 (en) * 1974-01-21 1975-08-18 Baxter Laboratories Inc
US4263808A (en) * 1979-03-26 1981-04-28 Baxter Travenol Laboratories, Inc. Noninvasive pressure monitor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3550619A (en) * 1968-06-21 1970-12-29 Becton Dickinson Co Tubing holder
DE2055281A1 (en) * 1969-11-17 1971-06-03 CCI Aerospace Corp , Van Nuys, Calif (V St A) Disposable dialyzer
FR2082978A5 (en) * 1969-11-17 1971-12-10 Cci Aerospace Corp
DE2121740A1 (en) * 1970-05-04 1971-12-02 Danske Sukkerfab Pressure transducer
FR2179980A1 (en) * 1972-04-11 1973-11-23 Nycotron As
FR2258190A1 (en) * 1974-01-21 1975-08-18 Baxter Laboratories Inc
US4263808A (en) * 1979-03-26 1981-04-28 Baxter Travenol Laboratories, Inc. Noninvasive pressure monitor

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0800838A2 (en) * 1992-04-30 1997-10-15 Medisystems Technology Corporation Hemodialysis apparatus with upright U-shaped pump tubing
EP0800838A3 (en) * 1992-04-30 1998-02-04 Medisystems Technology Corporation Hemodialysis apparatus with upright U-shaped pump tubing
US5762805A (en) * 1993-02-12 1998-06-09 Cobe Laboratories, Inc. Technique for extracorporeal treatment of blood
EP0611227A1 (en) * 1993-02-12 1994-08-17 Hospal Industrie Integrated blood treatment fluid module
EP0611228A3 (en) * 1993-02-12 1994-12-21 Hospal Ind Technique for extracorporeal treatment of blood.
US5441636A (en) * 1993-02-12 1995-08-15 Cobe Laboratories, Inc. Integrated blood treatment fluid module
EP0611228A2 (en) * 1993-02-12 1994-08-17 Hospal Industrie Technique for extracorporeal treatment of blood
US5910252A (en) * 1993-02-12 1999-06-08 Cobe Laboratories, Inc. Technique for extracorporeal treatment of blood
US5679245A (en) * 1993-02-12 1997-10-21 Cobe Laboratories, Inc. Retention device for extracorporeal treatment apparatus
US5776345A (en) * 1993-02-12 1998-07-07 Cobe Laboratories, Inc. Automatic priming technique
US6179801B1 (en) 1995-06-07 2001-01-30 Gambro, Inc. Extracorporeal blood processing methods and apparatus
US6409696B1 (en) 1995-06-07 2002-06-25 Gambro, Inc. Extracorporeal blood processing methods and apparatus
US5750025A (en) * 1995-06-07 1998-05-12 Cobe Laboratories, Inc. Disposable for an apheresis system with a contoured support
US5720716A (en) * 1995-06-07 1998-02-24 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US5702357A (en) * 1995-06-07 1997-12-30 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US5795317A (en) * 1995-06-07 1998-08-18 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US5837150A (en) * 1995-06-07 1998-11-17 Cobe Laboratories, Inc. Extracorporeal blood processing methods
WO1996040322A3 (en) * 1995-06-07 1997-03-06 Cobe Lab Extracorporeal blood processing methods and apparatus
US5919154A (en) * 1995-06-07 1999-07-06 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US5921950A (en) * 1995-06-07 1999-07-13 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US5941842A (en) * 1995-06-07 1999-08-24 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US6129656A (en) * 1995-06-07 2000-10-10 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
WO1996040322A2 (en) * 1995-06-07 1996-12-19 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US6196987B1 (en) 1995-06-07 2001-03-06 Gambro, Inc. Extracorporeal blood processing methods and apparatus
US7108672B2 (en) 1995-06-07 2006-09-19 Gambro Inc Extracorporeal blood processing methods and apparatus
US6234989B1 (en) 1995-06-07 2001-05-22 Gambro, Inc. Extracorporeal blood processing methods and apparatus
US6361518B1 (en) 1995-06-07 2002-03-26 Gambro Inc. Extracorporeal blood processing methods and apparatus
US5722946A (en) * 1995-06-07 1998-03-03 Cobe Laboratories, Inc. Extracorporeal blood processing methods and apparatus
US6497674B1 (en) 1995-06-07 2002-12-24 Gambro, Inc. Extracorporeal blood processing methods and apparatus
US6613009B1 (en) 1995-06-07 2003-09-02 Gambro, Inc. Extracorporeal blood processing methods and apparatus
US6902539B2 (en) 1995-06-07 2005-06-07 Gambro Inc Extracorporeal blood processing methods and apparatus
US6773413B2 (en) 1997-09-05 2004-08-10 Gamero Inc Extracorporeal blood processing methods and apparatus
US6200287B1 (en) 1997-09-05 2001-03-13 Gambro, Inc. Extracorporeal blood processing methods and apparatus
US7354415B2 (en) 2000-03-09 2008-04-08 Gambro Bct, Inc. Extra-corporeal blood processing method and apparatus based on donor characteristics
US6730055B2 (en) 2000-03-09 2004-05-04 Gambro Inc. Extracorporeal blood processing methods and apparatus
US6945948B2 (en) 2000-03-09 2005-09-20 Gambro, Inc. Extra-corporeal dual stage blood processing method and apparatus
US6994781B2 (en) 2000-07-07 2006-02-07 Baxter International Inc. Medical system, method and apparatus employing MEMS
US7217356B2 (en) 2000-07-07 2007-05-15 Fenwal, Inc. Medical system, method and apparatus employing MEMS
US7744553B2 (en) 2003-12-16 2010-06-29 Baxter International Inc. Medical fluid therapy flow control systems and methods
US8430835B2 (en) 2003-12-16 2013-04-30 Baxter International Inc. Renal therapy blood cleansing system with balance chamber and bolus, rinseback or prime volume feature
US9211370B2 (en) 2003-12-16 2015-12-15 Baxter International Inc. Renal therapy blood cleansing system with isolation feature
US10195332B2 (en) 2003-12-16 2019-02-05 Baxter International Inc. Renal therapy blood cleansing system with selective valve feature
US10426882B2 (en) 2003-12-16 2019-10-01 Baxter International Inc. Blood rinseback system and method
US11672897B2 (en) 2003-12-16 2023-06-13 Baxter International Inc. Blood rinseback system and method
US9733805B2 (en) 2012-06-26 2017-08-15 Terumo Bct, Inc. Generating procedures for entering data prior to separating a liquid into components

Also Published As

Publication number Publication date
CA1104032A (en) 1981-06-30
JPS53139399A (en) 1978-12-05
GB1601855A (en) 1981-11-04
GB1601856A (en) 1981-11-04
DE2820256A1 (en) 1978-11-23

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