IL42727A - Dual blood filter - Google Patents
Dual blood filterInfo
- Publication number
- IL42727A IL42727A IL42727A IL4272773A IL42727A IL 42727 A IL42727 A IL 42727A IL 42727 A IL42727 A IL 42727A IL 4272773 A IL4272773 A IL 4272773A IL 42727 A IL42727 A IL 42727A
- Authority
- IL
- Israel
- Prior art keywords
- blood filter
- filter element
- accordance
- blood
- element cascade
- Prior art date
Links
- 210000004369 blood Anatomy 0.000 title claims abstract 50
- 239000008280 blood Substances 0.000 title claims abstract 50
- 230000009977 dual effect Effects 0.000 title 1
- 239000004033 plastic Substances 0.000 claims abstract 14
- 229920003023 plastic Polymers 0.000 claims abstract 14
- 239000011148 porous material Substances 0.000 claims abstract 8
- 239000000463 material Substances 0.000 claims abstract 7
- -1 polypropylene Polymers 0.000 claims abstract 5
- 125000006850 spacer group Chemical group 0.000 claims abstract 4
- 239000004743 Polypropylene Substances 0.000 claims abstract 3
- 229920000728 polyester Polymers 0.000 claims abstract 3
- 229920001155 polypropylene Polymers 0.000 claims abstract 3
- 239000004952 Polyamide Substances 0.000 claims abstract 2
- 239000004698 Polyethylene Substances 0.000 claims abstract 2
- 239000004744 fabric Substances 0.000 claims abstract 2
- 229920002647 polyamide Polymers 0.000 claims abstract 2
- 229920000515 polycarbonate Polymers 0.000 claims abstract 2
- 239000004417 polycarbonate Substances 0.000 claims abstract 2
- 229920000573 polyethylene Polymers 0.000 claims abstract 2
- 239000012530 fluid Substances 0.000 claims 15
- 230000013011 mating Effects 0.000 claims 4
- 208000007536 Thrombosis Diseases 0.000 claims 3
- 230000000903 blocking effect Effects 0.000 claims 2
- 210000001772 blood platelet Anatomy 0.000 claims 2
- 210000003743 erythrocyte Anatomy 0.000 claims 2
- 210000000265 leukocyte Anatomy 0.000 claims 2
- 239000002245 particle Substances 0.000 claims 2
- 229920005992 thermoplastic resin Polymers 0.000 claims 2
- 238000005266 casting Methods 0.000 claims 1
- 230000004927 fusion Effects 0.000 claims 1
- 150000002632 lipids Chemical class 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 229920004934 Dacron® Polymers 0.000 abstract 1
- 239000004809 Teflon Substances 0.000 abstract 1
- 229920006362 Teflon® Polymers 0.000 abstract 1
- 239000002991 molded plastic Substances 0.000 abstract 1
- 239000005020 polyethylene terephthalate Substances 0.000 abstract 1
- 210000002105 tongue Anatomy 0.000 abstract 1
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D27/00—Cartridge filters of the throw-away type
- B01D27/04—Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D27/00—Cartridge filters of the throw-away type
- B01D27/04—Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper
- B01D27/06—Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper with corrugated, folded or wound material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D27/00—Cartridge filters of the throw-away type
- B01D27/08—Construction of the casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0654—Support layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0668—The layers being joined by heat or melt-bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0672—The layers being joined by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0681—The layers being joined by gluing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1216—Pore size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1291—Other parameters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
- Paper (AREA)
Abstract
1438565 Filter series for blood PALL CORP 26 July 1973 [31 July 1972] 35751/73 Heading B1D A blocd filter has a series of two sheet filter elements arranged with the coarser element upstream of the finer. The first element is a sheet of open netting of filamentary plastics material of pore size about 800-4000 microns, and the second a sheet of open mesh plastics monofilament fabric of pore size 20-53 microns. In Fig. 1, the series is folded and gripped at two ends by tongues 27 of a plastics housing, the other sides being sealed to the housing which is made from two halves. In Fig. 4 the series is in the form of a collapsed pleated cylinder sealed in a plastics bag along the lines 52 an entry tube 55 being sealed and enclosed within the filter element series, flow being from inside to outside. The elements may be composed of polypropylene, polyethylene, polyester, polyamide or polycarbonate. The finer sheet, i.e. the second may be a woven square mesh having the filaments locked at their insections. The coarser sheet may be extruded, cast or moulded plastics having filaments joined at intersections. A support or spacer may be present between the two elements and may be of the same material as the coarse element having pores at least as large as the coarse element and within the range 800-10000 microns. The materials may be "Dacron" (RTM), Teflon (RTM), "Vexar" (RTM), "KEL-F" (RTM). The filters may be connected by Luer locks or have conduits shaped as spikes for piercing and joining into blood bags.
[GB1438565A]
Claims (32)
1. A blood filter element cascade which can be used in blood transfusions without blockage, and which is capable of removing large particles, such as blood clots, and also small particles down to approximately 20μ in size, while passing platelets, red blood cells and at least a substantial proportion of white blood cells, comprising in combination, two filter sheets, arranged in downstream flow sequence in order of progressively increasing fineness; (a) the first filter sheet comprising coarse open netting of plastic filamentary material having a pore size within the range from about 800 to about 4, 000 microns, small enough to remove blood clots, and coarse enough to do so without being subject to blocking by the blood clots that are strained out, and (b) the second filter sheet comprising an open mesh fabric of plastic monofilaments, having a pore size within the range from about 20 to about 50 microns, capable of removing microemboli, lipids and debris, and gas emboli, that pass through the first filter element while passing platelets, white blood cells, and red blood cells .
2. A blood filter element cascade according to claim 1, in which the first filter sheet is an open-mesh netting prepared by extruding, casting, or molding plastic and having an integral filamentary structure.
3. A blood filter element cascade according to claim 2, in which the plastic material is selected from polypropylene, polyethylene, polyester, polyamide, and polycarbonate.
4. A blood filter element cascade according to claim 1, in which the second filter sheet is a woven square-weave mesh of plastic monofilaments having a pore size within the range from about 20 to about 50 microns, the filaments being locked in place at their crossing points.
5. A blood filter element cascade in accordance with claim 4, in which the monofilaments have a diameter within the range from about 25 to about 50 microns .
6. A blood filter element cascade in accordance with claim 4, in which the plastic monofilaments are of polyester plastic.
7. A blood filter element cascade in accordance with claim 1, in which the filaments are heat set to lock them in place.
8. A blood filter element cascade according to claim 1, in which the two filter sheets are in close juxtaposition, and corrugated or convoluted to provide a high surface area to flow.
9. A blood filter element cascade according to claim 8, in which second filter sheet is juxtaposed to a spacer having a pore size at least as large as the first filter sheet, and within the range from about 800 to about 10, 000 microns .
10. A blood filter element cascade according to claim 9, in which the spacer has an uneven surface so as to provide drainage and prevent blocking of the filter sheet by the spacer.
11. A disposable blood filter unit comprising a blood filter element cascade according to claim 1, and a housing having an inlet and an outlet and line connections thereat for fluid flow into and out from the housing, the blood filter element cascade being disposed in the housing across the line of flow therebetween so that fluid flow therebetween must pass through the filter element cascade.
12. A disposable blood filter unit in accordance with claim 11, in which the blood filter element cascade is in the form of a cylinder, and one line connection has a direct fluid flow connection to the interior of the filter cylinder.
13. A disposable filter unit in accordance with claim 11, having a housing made in two portions bonded together.
14. A disposable filter unit in accordance with claim 13, made of plastic, with the portions fused together into one piece.
15. A disposable filter unit in accordance with claim 14, including line connections integral with the housing.
16. A disposable filter unit in accordance with claim 14, having the filter unit bonded to one housing portion.
17. A disposable filter unit in accordance with claim 16, having the filter unit bonded to one housing portion at the outlet with a direct fluid flow line connection from the filtrate-flow side of the filter element to the outlet.
18. A disposable blood filter unit according to claim 11, in which the housing is composed at least of first and second generally channel-shaped housing portions, defining therebetween a fluid chamber open at two sides, the first and second housing portions having opposed sides, with mating sections abutting and bonded in a fluid- tight seal to each other, and the blood filter element cascade in sheet form extending across the fluid chamber, across the line of fluid flow between the fluid ports and held at opposed side portions to at least one of the first and second housing portions, and side caps bonded to the first and second housing portions in a fluid-tight seal across the open sides of the fluid chamber and to the sides of the blood filter element cascade extending along such open sides, the side caps and the housing portions holding the sides of the blood filter element cascade, positioning the blood filter element cascade across the fluid chamber, and sealing all the sides of the blood filter element cascade to the housing, so that the fluid flow between the fluid ports must pass through the blood filter element cascade.
19. A disposable blood filter unit in accordance with claim 18, having four sides, two of the sides being defined by the side caps and two of the sides by the first and second housing portions, and the blood filter element cascade is in four- sided sheet form.
20. A disposable blood filter unit in accordance with claim 19, in which the blood filter element cascade is in four-sided corrugated sheet form.
21. A disposable blood filter unit in accordance with claim 18, in which the first and the second housing portions and the fluid ports therein are arranged so that the fluid ports are coaxial.
22. A disposable blood filter unit in accordance with claim 18, in which all of the housing portions are of plastic material.
23. A disposable blood filter unit in accordance with claim 22, in which the plastic material is a thermoplastic resin.
24. A disposable blood filter unit in accordance with claim 23, in which the thermoplastic resin is polypropylene.
25. A disposable blood filter unit in accordance with claim 22, in which the housing portions are integrated together to form a one-piece housing.
26. A disposable blood filter unit in accordance with claim 18, in which the blood filter element cascade is held at opposed side portions between the mating sections of the first and second housing portions.
27. A disposable blood filter unit in accordance with claim 26, in which the blood filter element cascade is integrated to the mating sections by fusion thereof through the pores of the blood filter element cascade.
28. A disposable blood filter unit in accordance with claim 18, in which the side caps are integrated to the housing portions to form an integral one-piece filter unit.
29. A disposable blood filter unit in accordance with claim 18, in which each of the housing portions includes at least one projecting portion engaging and supporting opposite sides of the blood filter element cascade, and extending with the blood filter element cascade across the fluid chamber.
30. A disposable blood filter unit in accordance with claim 18, in which one housing portion comprises a proj ecting member holding the opposite end portions of the blood filter element cascade against the other housing portion.
31. A disposable blood filter unit in accordance with claim 30, in which the mating sections of each housing portion have first projecting members extending towards each other, and abutting endwise, with the first housing portion having second projecting members extending internally of the two abutting portions, and en a in the blood filter element cascade at a ortion near its
32. A disposable blood filter unit in accordance with claim 30, in which the second projecting members also hold the blood filter element cascade tightly against an internal wall of the second housing portion.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27662372A | 1972-07-31 | 1972-07-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL42727A0 IL42727A0 (en) | 1973-10-25 |
| IL42727A true IL42727A (en) | 1976-10-31 |
Family
ID=23057422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL42727A IL42727A (en) | 1972-07-31 | 1973-07-12 | Dual blood filter |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS4985663A (en) |
| AU (1) | AU469724B2 (en) |
| BE (1) | BE803019A (en) |
| CA (1) | CA998005A (en) |
| DE (1) | DE2333479C3 (en) |
| DK (1) | DK148875C (en) |
| FI (1) | FI59724C (en) |
| FR (1) | FR2194450B1 (en) |
| GB (1) | GB1438565A (en) |
| IL (1) | IL42727A (en) |
| IT (1) | IT989937B (en) |
| NL (1) | NL7310076A (en) |
| NO (1) | NO131409C (en) |
| SE (1) | SE412520B (en) |
| ZA (1) | ZA734953B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS544121Y2 (en) * | 1974-07-05 | 1979-02-23 | ||
| US4066556A (en) * | 1976-10-28 | 1978-01-03 | Johnson & Johnson | Fluid filter and method of making same |
| US4187182A (en) * | 1978-07-21 | 1980-02-05 | Pall Corporation | Box filter |
| DE2905514C2 (en) * | 1979-02-14 | 1987-03-05 | Fresenius AG, 6380 Bad Homburg | Blood filter |
| AU609741B2 (en) * | 1986-10-06 | 1991-05-09 | Terumo Kabushiki Kaisha | Blood component separator |
| GB8709385D0 (en) * | 1987-04-21 | 1987-05-28 | Polden Products Ltd | Filter assembly |
| DE9201574U1 (en) * | 1992-02-08 | 1992-04-23 | Medimex Holfeld GmbH & Co., 2000 Hamburg | Adapter for connecting a tube catheter with a conical connector |
| EP2500077A1 (en) * | 2011-03-17 | 2012-09-19 | Sefar AG | Filter element with two woven layers |
| US11559621B2 (en) * | 2017-10-24 | 2023-01-24 | Buffalo Filter Llc | Method and apparatus for filtering |
-
1973
- 1973-06-30 DE DE2333479A patent/DE2333479C3/en not_active Expired
- 1973-07-04 AU AU57688/73A patent/AU469724B2/en not_active Expired
- 1973-07-11 CA CA176,184A patent/CA998005A/en not_active Expired
- 1973-07-12 IL IL42727A patent/IL42727A/en unknown
- 1973-07-13 JP JP48079213A patent/JPS4985663A/ja active Pending
- 1973-07-19 NL NL7310076A patent/NL7310076A/xx unknown
- 1973-07-19 IT IT51548/73A patent/IT989937B/en active
- 1973-07-20 ZA ZA734953A patent/ZA734953B/en unknown
- 1973-07-26 GB GB3575173A patent/GB1438565A/en not_active Expired
- 1973-07-26 NO NO3021/73A patent/NO131409C/no unknown
- 1973-07-30 FI FI2386/73A patent/FI59724C/en active
- 1973-07-30 DK DK418873A patent/DK148875C/en active
- 1973-07-31 BE BE134057A patent/BE803019A/en not_active IP Right Cessation
- 1973-07-31 SE SE7310512A patent/SE412520B/en unknown
- 1973-07-31 FR FR7328091A patent/FR2194450B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NO131409B (en) | 1975-02-17 |
| DE2333479B2 (en) | 1976-11-18 |
| AU469724B2 (en) | 1976-02-19 |
| DE2333479C3 (en) | 1979-11-22 |
| SE412520B (en) | 1980-03-10 |
| BE803019A (en) | 1974-01-31 |
| DE2333479A1 (en) | 1974-02-21 |
| AU5768873A (en) | 1975-01-09 |
| FI59724C (en) | 1981-10-12 |
| FR2194450A1 (en) | 1974-03-01 |
| GB1438565A (en) | 1976-06-09 |
| IT989937B (en) | 1975-06-10 |
| FI59724B (en) | 1981-06-30 |
| NL7310076A (en) | 1974-02-04 |
| DK148875B (en) | 1985-11-04 |
| JPS4985663A (en) | 1974-08-16 |
| DK148875C (en) | 1986-04-14 |
| IL42727A0 (en) | 1973-10-25 |
| ZA734953B (en) | 1974-07-31 |
| NO131409C (en) | 1975-05-28 |
| FR2194450B1 (en) | 1977-08-05 |
| CA998005A (en) | 1976-10-05 |
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