US3792978A - Envelope assembly for spool type oxygenator - Google Patents

Envelope assembly for spool type oxygenator Download PDF

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Publication number
US3792978A
US3792978A US00257537A US3792978DA US3792978A US 3792978 A US3792978 A US 3792978A US 00257537 A US00257537 A US 00257537A US 3792978D A US3792978D A US 3792978DA US 3792978 A US3792978 A US 3792978A
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US
United States
Prior art keywords
envelope assembly
envelope
tube
spool
sleeve
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.)
Expired - Lifetime
Application number
US00257537A
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English (en)
Inventor
F Freedman
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.)
SCI MED LIFE SYST Inc
SCI MED LIFE SYST INC US
Medtronic International Trading Inc
Original Assignee
SCI MED LIFE SYST 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 SCI MED LIFE SYST Inc filed Critical SCI MED LIFE SYST Inc
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Publication of US3792978A publication Critical patent/US3792978A/en
Anticipated expiration legal-status Critical
Assigned to AVECOR INC. A MN CORPORATION reassignment AVECOR INC. A MN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SCIMED LIFE SYSTEMS, INC., A CORPORATION OF MN
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/10—Spiral-wound membrane modules
    • B01D63/103—Details relating to membrane envelopes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/10—Specific supply elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S128/00—Surgery
    • Y10S128/03—Heart-lung

Definitions

  • ABSTRACT The invention relates to an envelope assembly for a spool wound artificial lung.
  • the envelope assembly is characterized by having unobtrusive tube attachments which allow the envelope to be wound smoothly and evenly about the spool of the oxygenator.
  • the invention relates to a new and improved envelope assembly for a spool wound artificial lung which may also be referred to as an oxygenator.
  • a spool wound artificial oxygenator as referred to above is disclosed in US. Pat. No. 3,489,647 to Theodor Kolobow titled, Artificial Organ for Membrane Dialysis of Biological Fluids.
  • the envelope assembly 11 as disclosed in the Kolobow patent is more or less schematic in nature and a practical embodiment thereof would have to be considerably modified to be effective for its intended purpose.
  • the envelope 11 is wound around the spool or core and, as is characteristic of membrane type oxygenators, the principle of gas diffusion through a membrane is utilized, there being an exchange of oxygen and carbon dioxide under conditions similar to those existing in the lungs. Without going unduly into detail at this point, it is essential to obtaining optimum conditions that the envelope be wound smoothly and evenly about the spool to avoid channeling of the blood. Winding in this desirable manner is not possible, however, if the tube attachments are bulky and cumbersome.
  • An object of the present invention is to provide a new and improved artificial lung or oxygenator envelope assembly having a tube attachment which is unobtrusive so as to not interfere with the capability of the envelope to be smoothly and evenly wound about the oxygenator spool.
  • FIG. 1 is a fragmentary front elevational view, partly in section, of an envelope assembly for an artificial lung which assembly embodies the invention
  • FIG. 2 is a sectional view of the envelope assembly taken on line 22 of FIG. 1;
  • FIG. 3 is a perspective view of the envelope assembly shown in FIGS. I and 2.
  • FIG. 10 there is shown a corner section of an envelope assembly 10 which includes an attached tube 22.
  • the tube construction and the manner of its attachment to the envelope is the'same whether it is to function as a gas inlet tube or a gas outlet tube.
  • the envelope assembly comprises a pair of rectangu-Wholy shaped membrane sheets 14 and 15 made of a gas permeable material such as silicone rubber, Teflon or polypropylene. These sheets have a thickness on the order of 0.005 inch. As the word envelope implies, the fourjoining edges of the sheets 14 and 15 are sealed with a suitable cement to form a seam 18 having a width on the order of A inch.
  • a gas permeable material such as silicone rubber, Teflon or polypropylene.
  • spacer screen 20 which may be of any suitable material such as fiberglass, Saran or nylon and has a thickness on the order of 0.030 inch. Spacer screen 20 functions to maintain a desired spacing between the membrane sheets 14 and 15 to provide a gas chamber which resists collapsing when the external pressure on the sheets 14 and 15 is greater than the internal pressure.
  • screen 20 is spaced from the seam 18 and is definitely not cemented into the seam.
  • Tubing means are provided for admitting and exhausting gaseous fluids to and from the enclosed space between membrane sheets 14 and 15 which forms an enclosed chamber as stated above.
  • Tube 22 is made of silicon rubber and has a stainless steel, coiled spring 24 inserted therein in a known manner, the purpose of the spring being to prevent kinking of the tube and to present a resistance to the collapsing of the tube when the external environmentalpressure exceeds the internal pressure.
  • the end of tube 22 is force fitted onto a cylindrically shaped, rigid plastic sleeve 26 having an internal diameter which is nominally the same as the external diameter of tube 22.
  • Sleeve 26 has a transversely extending slit 28 for receiving or accommodating the screen 20.
  • Bib 30 In surrounding relation to the screen 20 and the sleeve 26 is a folded bib member 30.
  • Bib 30 has an opening which is centrally located relative to the center fold 32 thereof and in closely fitting relation to the sleeve 26.
  • Bib 30 is made of a polyester, cellulose acetate or other suitable plastic material and the purpose or function of it is to protect the inside surfaces of the membrane sheets 14 and 15 from any possibly sharp edge on the sleeve 26.
  • the sleeve 26 is forced onto the end of the tube 22 and the sleeve is slipped into the opening 31 of the bib 30.
  • the edge of the screen 20 is inserted into the slit 28 of the sleeve 26 and the two membrane sheets 14 and 15 are then cemented together to form the seam 18 as described above.
  • the lower end of the tube 22 and the upper end of the plastic sleeve 26 are in the seam proper between the sealed edges of the membrane sheets 14 and 15.
  • the folded edge of the bib 30 is likewise in the seam proper between the sealed edges of the membrane sheets 14 and 15, as illustrated.
  • a gas exchange envelope assembly for a spool type oxygenator comprising a pair of rectangularly shaped fluid permeable membrane sheets, said sheets being cemented together to form a peripherally extending seam and a chamber therebetween, a screen member in said chamber in closely spaced relation to the internal boundary of said seam, a tube having a sleeve attached at one end thereof in surrounding relation thereto, said tube end and a portion of said sleeve being cemented to and between said sheets within the boundaries of said seam, said sleeve having a transversely extending slit in straddling relation to said screen.
  • An envelope assembly according to claim 1 including a folded bib member having folded parts and an opening along the fold line thereof, said bib opening being in surrounding relation to said sleeve and said folded parts being in straddling relation to said screen.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • External Artificial Organs (AREA)
US00257537A 1972-05-30 1972-05-30 Envelope assembly for spool type oxygenator Expired - Lifetime US3792978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25753772A 1972-05-30 1972-05-30

Publications (1)

Publication Number Publication Date
US3792978A true US3792978A (en) 1974-02-19

Family

ID=22976698

Family Applications (1)

Application Number Title Priority Date Filing Date
US00257537A Expired - Lifetime US3792978A (en) 1972-05-30 1972-05-30 Envelope assembly for spool type oxygenator

Country Status (8)

Country Link
US (1) US3792978A (en:Method)
JP (1) JPS5618214B2 (en:Method)
CA (1) CA1023631A (en:Method)
DE (1) DE2327200C3 (en:Method)
FR (1) FR2186271B1 (en:Method)
GB (1) GB1385835A (en:Method)
NL (1) NL7307224A (en:Method)
SE (1) SE402211B (en:Method)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892533A (en) * 1973-03-02 1975-07-01 Sci Med Oxygenator gas distribution header
US4019988A (en) * 1975-08-28 1977-04-26 Extracorporeal Medical Specialities Inc. Dialyzer membrane seal and tubing connector
US4306018A (en) * 1980-06-26 1981-12-15 The Board Of Regents Of The University Of Nebraska Method of gas-heat exchange
US4370305A (en) * 1979-07-23 1983-01-25 Hoelzle & Chelius Kg Device for the sterilization of fluid substances
US4490331A (en) * 1982-02-12 1984-12-25 Steg Jr Robert F Extracorporeal blood processing system
US4599093A (en) * 1982-02-12 1986-07-08 Steg Jr Robert F Extracorporeal blood processing system
US5786215A (en) * 1987-05-20 1998-07-28 Baxter International Inc. Method for culturing animal cells
US5957879A (en) * 1997-01-24 1999-09-28 Heartport, Inc. Methods and devices for maintaining cardiopulmonary bypass and arresting a patient's heart

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AR207768A1 (es) * 1974-01-02 1976-10-29 Baxter Laboratories Inc Un oxigenador sanguineo mejorado
DE3906034C1 (en:Method) * 1989-02-27 1990-09-27 Dr. J. Haensler Gmbh, 7557 Iffezheim, De

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3489647A (en) * 1964-05-06 1970-01-13 Dow Corning Artificial organ for membrane dialysis of biological fluids
US3508662A (en) * 1969-01-21 1970-04-28 Extracorporeal Med Spec Disposable,low-prime,spirally wound,artificial kidney
US3567028A (en) * 1968-12-26 1971-03-02 Research Corp Membrane envelope assembly
US3729377A (en) * 1971-03-12 1973-04-24 Baxter Laboratories Inc Envelope oxygenator for blood having inflatable portions and process of using same
US3738813A (en) * 1971-06-04 1973-06-12 W Esmond Mass transfer device and method of making same
US3741395A (en) * 1971-03-11 1973-06-26 Vernitron Medical Prod Inc Disposable human blood dialysis device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367504A (en) * 1964-12-21 1968-02-06 Gulf General Atomic Inc Spirally wrapped reverse osmosis membrane cell
GB1203582A (en) * 1966-10-10 1970-08-26 Nat Res Dev Improvements in or relating to dialysers
US3648693A (en) * 1969-05-28 1972-03-14 Jintan Terumo Co Bag apparatus for transfusion of blood or fluid involving heat shrinkable tube means
US3668837A (en) * 1970-02-13 1972-06-13 Pall Corp Separator of the semipermeable membrane type

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3489647A (en) * 1964-05-06 1970-01-13 Dow Corning Artificial organ for membrane dialysis of biological fluids
US3567028A (en) * 1968-12-26 1971-03-02 Research Corp Membrane envelope assembly
US3508662A (en) * 1969-01-21 1970-04-28 Extracorporeal Med Spec Disposable,low-prime,spirally wound,artificial kidney
US3741395A (en) * 1971-03-11 1973-06-26 Vernitron Medical Prod Inc Disposable human blood dialysis device
US3729377A (en) * 1971-03-12 1973-04-24 Baxter Laboratories Inc Envelope oxygenator for blood having inflatable portions and process of using same
US3738813A (en) * 1971-06-04 1973-06-12 W Esmond Mass transfer device and method of making same

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892533A (en) * 1973-03-02 1975-07-01 Sci Med Oxygenator gas distribution header
US4019988A (en) * 1975-08-28 1977-04-26 Extracorporeal Medical Specialities Inc. Dialyzer membrane seal and tubing connector
US4370305A (en) * 1979-07-23 1983-01-25 Hoelzle & Chelius Kg Device for the sterilization of fluid substances
US4306018A (en) * 1980-06-26 1981-12-15 The Board Of Regents Of The University Of Nebraska Method of gas-heat exchange
US4490331A (en) * 1982-02-12 1984-12-25 Steg Jr Robert F Extracorporeal blood processing system
US4599093A (en) * 1982-02-12 1986-07-08 Steg Jr Robert F Extracorporeal blood processing system
US5786215A (en) * 1987-05-20 1998-07-28 Baxter International Inc. Method for culturing animal cells
US5957879A (en) * 1997-01-24 1999-09-28 Heartport, Inc. Methods and devices for maintaining cardiopulmonary bypass and arresting a patient's heart
US6443922B1 (en) 1997-01-24 2002-09-03 Heartport, Inc. Methods and devices for maintaining cardiopulmonary bypass and arresting a patient's heart
US20020176797A1 (en) * 1997-01-24 2002-11-28 Roberts Craig P. Methods and devices for maintaining cardiopulmonary bypass and arresting a patient's heart
US6974434B2 (en) 1997-01-24 2005-12-13 Heartport, Inc. Methods and devices for maintaining cardiopulmonary bypass and arresting a patient's heart

Also Published As

Publication number Publication date
FR2186271B1 (en:Method) 1978-05-26
DE2327200C3 (de) 1978-05-11
GB1385835A (en) 1975-03-05
FR2186271A1 (en:Method) 1974-01-11
DE2327200B2 (de) 1977-09-22
NL7307224A (en:Method) 1973-12-04
DE2327200A1 (de) 1973-12-06
JPS4950792A (en:Method) 1974-05-17
SE402211B (sv) 1978-06-26
JPS5618214B2 (en:Method) 1981-04-27
CA1023631A (en) 1978-01-03

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Date Code Title Description
AS Assignment

Owner name: AVECOR INC. A MN CORPORATION, MINNESOTA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SCIMED LIFE SYSTEMS, INC., A CORPORATION OF MN;REEL/FRAME:005751/0218

Effective date: 19910607