US3792978A - Envelope assembly for spool type oxygenator - Google Patents
Envelope assembly for spool type oxygenator Download PDFInfo
- 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
- Authority
- 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
Links
- 210000004072 lung Anatomy 0.000 abstract description 6
- 239000012528 membrane Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000013060 biological fluid Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011034 membrane dialysis Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- External Artificial Organs (AREA)
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.
Description
United States Patent [1 1' Freedman ENVELOPE ASSEMBLY FOR SPOOL TYPE I OXYGENATOR [75] Inventor: Frank B. Freedman, St. Louis, Mo.
[73] Assignee: Sci-Med Life Systems, Inc.,
: Minneapolis, Minn. 22 Filed: May 30, 1972 [21] Appl. No.: 257,537
[52] U.S. Cl 23/2585, 128/DIG. 3, 210/321, 210/494 [51] Int. Cl A6lm l/03 [58] Field of Search 23/2585; 210/321, 494; l28/DIG. 3
[56] References Cited UNITED STATES PATENTS 3,489,647 1/1970 Kolobow 23/2585 X [451 Feb. 19, 1974 3,508,662 4/1970 Miller 210/494 X 3,567,028 3/1971 Nose 23/2585 X 3,729,377 4/1973 Leonard 23/2585 X 3,738,813 6/1973 Esmond 23/2585 3,741,395 6/1973 Zimmerman 1. 210/321 Primary ExaminerBarry S. Richman Attorney, Agent, or Firm-Walter N. Kim, Jr.
[57] 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.
2 Claims, 3 Drawing Figures ENVELOPE ASSEMBLY FOR SPOOL TYPE 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.
Other objects and advantages of the invention will become apparent from the following specification, drawings and appended claims:
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; and
FIG. 3 is a perspective view of the envelope assembly shown in FIGS. I and 2.
In the drawing, 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- Iarly 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.
Within the space bounded by the sealed edges of the envelope formed by the sheets 14 and 15 is sandwiched a 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.
It is of importance that 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. Only one tube 22 is illustrated but it will be understood that any number of similarly constructed and installed tubes may be utilized. 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.
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.
In the manufacture of the envelope assembly 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. In this operation 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.
I claim:
1. 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.
2. 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.
Claims (1)
- 2. 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.
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) |
JP (1) | JPS5618214B2 (en) |
CA (1) | CA1023631A (en) |
DE (1) | DE2327200C3 (en) |
FR (1) | FR2186271B1 (en) |
GB (1) | GB1385835A (en) |
NL (1) | NL7307224A (en) |
SE (1) | SE402211B (en) |
Cited By (8)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AR207768A1 (en) * | 1974-01-02 | 1976-10-29 | Baxter Laboratories Inc | AN IMPROVED BLOOD OXYGENER |
DE3906034C1 (en) * | 1989-02-27 | 1990-09-27 | Dr. J. Haensler Gmbh, 7557 Iffezheim, De |
Citations (6)
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)
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 |
-
1972
- 1972-05-30 US US00257537A patent/US3792978A/en not_active Expired - Lifetime
-
1973
- 1973-05-23 GB GB2457373A patent/GB1385835A/en not_active Expired
- 1973-05-23 NL NL7307224A patent/NL7307224A/xx not_active Application Discontinuation
- 1973-05-28 CA CA172,866A patent/CA1023631A/en not_active Expired
- 1973-05-28 DE DE2327200A patent/DE2327200C3/en not_active Expired
- 1973-05-29 SE SE7307567A patent/SE402211B/en unknown
- 1973-05-30 JP JP5994373A patent/JPS5618214B2/ja not_active Expired
- 1973-05-30 FR FR7319718A patent/FR2186271B1/fr not_active Expired
Patent Citations (6)
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)
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 |
---|---|
FR2186271A1 (en) | 1974-01-11 |
FR2186271B1 (en) | 1978-05-26 |
GB1385835A (en) | 1975-03-05 |
JPS4950792A (en) | 1974-05-17 |
NL7307224A (en) | 1973-12-04 |
DE2327200B2 (en) | 1977-09-22 |
CA1023631A (en) | 1978-01-03 |
DE2327200A1 (en) | 1973-12-06 |
SE402211B (en) | 1978-06-26 |
DE2327200C3 (en) | 1978-05-11 |
JPS5618214B2 (en) | 1981-04-27 |
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Legal Events
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 |