Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
  • B01D65/08—Prevention of membrane fouling or of concentration polarisation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
  • B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
  • B01D69/10—Supported membranes; Membrane supports
  • B01D69/106—Membranes in the pores of a support, e.g. polymerized in the pores or voids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
  • B01D69/10—Supported membranes; Membrane supports
  • B01D69/107—Organic support material
  • B01D69/1071—Woven, non-woven or net mesh
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
  • B01D69/12—Composite membranes; Ultra-thin membranes
  • B01D69/1214—Chemically bonded layers, e.g. cross-linking
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
  • B01D69/14—Dynamic membranes
  • B01D69/141—Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes
  • B01D69/1411—Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes containing dispersed material in a continuous matrix
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
  • B01D71/06—Organic material
  • B01D71/30—Polyalkenyl halides
  • B01D71/32—Polyalkenyl halides containing fluorine atoms
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
  • B01D71/06—Organic material
  • B01D71/30—Polyalkenyl halides
  • B01D71/32—Polyalkenyl halides containing fluorine atoms
  • B01D71/36—Polytetrafluoroethylene
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
  • B01D71/06—Organic material
  • B01D71/54—Polyureas; Polyurethanes
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/01—Filters implantable into blood vessels
  • A61F2002/018—Filters implantable into blood vessels made from tubes or sheets of material, e.g. by etching or laser-cutting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
  • B01D2321/281—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling by applying a special coating to the membrane or to any module element
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2325/00—Details relating to properties of membranes
  • B01D2325/08—Patterned membranes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2325/00—Details relating to properties of membranes
  • B01D2325/28—Degradation or stability over time
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2325/00—Details relating to properties of membranes
  • B01D2325/48—Antimicrobial properties

Definitions

• the structural rods are polymeric rods.
• the porous member has a thickness of equal to or greater than 0.25 mm.
• the filter means is provided by the structural means.
• the filter means can filter particles of matter from a fluid.
• the filter web comprises a plurality of filter web fibres arranged overlapping one another and having spacings therebetween, the spacing being equal to or less than 2.0 pm.
• the self-cleaning means most preferably the self-cleaning web, comprises at least one polymeric substance.
• the method comprises forming the structural frame, most preferably, the structural rods from PTFE.
• the method comprises forming a plurality of structural rods.
• the method comprises manufacturing a porous sheet and cutting and/or punching portions of the sheet, the cut- or punch-outs forming porous members.
• the method comprising stretching the filter web to adjust the spacings of the filter web.
• the method comprises forming, placing and/or stretching the filter means over the structural frame and/or the at least one porous member such that the spacing between the filter web fibres is wider at or around the at least one porous member than the spacing between the filter web fibres at or around the structural frame.
• the method comprises forming, placing and/or stretching the self-cleaning web over the filter means and/or the at least porous member.
• the method comprises heating the self-cleaning means, the filter means and/or the structural means to at least the melting point of the filter means.
• the method comprises cooling the semipermeable arrangement.
• the envelope being formed at least partially from at least one semipermeable arrangement, the at least one semipermeable arrangement comprising a structural means and at least one porous member, the at least one porous member being located on or within the structural means.
• the redundant lead length of the MAVIED can be colled into a lead-top arrangement within the envelope without the risk of fibrosis or tissue ingrowth over the lead.
• the envelope being sized to receive a pulse generator.
• the envelope comprising a substantially rectangular perimeter and/or a semicircular perimeter.
• the seal means comprises a male sealing member and a female sealing member.
• the joining means comprises melted plastic, most preferably, polyurethane.
• the semipermeable arrangement is adaptable or adapted for implantation into a recipient, for use with a M AVI ED, for use as a wound dressing, for use as a face mask, for use as a water filter, or for use as an air filter.
• the method comprising arranging the first layer relative to the second layer such that the second direction is orthogonal to the first direction.
• the method comprising sealing the first and second layers together by pressing them together.
• the method comprising sealing the first and second layers together by placing a material such as FEP or UP that is pliable or can be melted between the first and second layers, and pressing or heat-treating the structural means.
• the method comprises providing a porous and/or hydrophilic portion of the structural means extending over the openings of the passageways of the means to prevent or limit movement of the lubricating fluid through at least part of the structural means.
• the method comprises adapting the semipermeable arrangement for implantation into a recipient, for use with a MAVIED, for use as a wound dressing, for use as a face mask, for use as a water filter, or for use as an air filter.
• an envelope for use with a MAVIED the envelope being formed at least partially from at least one semipermeable arrangement, the at least one semipermeable arrangement comprising a structural means, the structural means being formed at least partially from a material having an affinity to a lubricating fluid and being adapted such that it can be infused with a lubricating fluid, the semipermeable arrangement being arranged with means to prevent or limit the movement of the lubricating fluid through at least part of the structural means.
• Figure 15 is a cross-sectional view of a tenth embodiment of a semipermeable arrangement according to the invention wherein the semipermeable arrangement is bent, showing redistribution of the lubricant through the structural frame.
• Figure 22 is a side elevation view of the filter web in Figure 20.
• Figure 29 is a side-elevation view of the self-cleaning web and filter web of Figure 27.
• Figure 30 is a side elevation, cross sectional view of a semipermeable arrangement according to an eleventh embodiment of the invention.
• Figure 34 is a plan view of the envelope in Figure 33.
• Figure 37 is a plan view of the envelope as shown in Figure 33.
• the filter web 12a does not contain any fluorine atoms and the ionophilicity of the perfluorocarbon liquid prevents it from dispersing through the filter web 12a.
• the self-cleaning web 14a contains gaps at the location of the porous member 3. Therefore, none of the perfluorocarbon liquid 20 extends over the surface of the porous member 3. Water and dissolved substances can enter and pass through the filter webs 12a, 12b and the porous member 3 even when the perfluorocarbon liquid 20 is present within the self-cleaning web 14a.
• Manufacturing the sixth embodiment in Figure 11 involves the same steps as manufacturing the second embodiment ( Figure 7) but with saturating the arrangement 601 with perfluorocarbon liquid such that it is present throughout the structural frame 2 and the self-cleaning webs 14a, 14b and an both surfaces of the semipermeable arrangement 601.
• Manufacturing the seventh embodiment as illustrated in Figure 12 involves the same steps as manufacturing the sixth embodiment but replacing the spherical porous member 3 with a spherical cap porous member 103.
• Manufacturing the eighth embodiment ( Figure 13) is the same as manufacturing the sixth and seventh embodiments ( Figures 11 and 12 respectively) but using a disc-shaped porous member 203.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Dispersion Chemistry (AREA)
• Filtering Materials (AREA)
• Separation Using Semi-Permeable Membranes (AREA)
• External Artificial Organs (AREA)
• Materials For Medical Uses (AREA)

Priority Applications (5)

Applications Claiming Priority (4)

Publications (2)

Family

ID=62598141

Family Applications (1)

Country Status (7)

Cited By (1)

Family Cites Families (12)

• 2018
  • 2018-05-03 GB GBGB1807322.1A patent/GB201807322D0/en not_active Ceased
  • 2018-08-07 GB GBGB1812846.2A patent/GB201812846D0/en not_active Ceased
• 2019
  • 2019-05-03 US US17/052,629 patent/US20210236995A1/en not_active Abandoned
  • 2019-05-03 JP JP2021510546A patent/JP2021522071A/ja active Pending
  • 2019-05-03 WO PCT/EP2019/061465 patent/WO2019211479A2/en not_active Ceased
  • 2019-05-03 CN CN201980045157.7A patent/CN112384293A/zh active Pending
  • 2019-05-03 EP EP19734690.1A patent/EP3796992A2/en not_active Withdrawn
  • 2019-05-03 CA CA3120219A patent/CA3120219A1/en active Pending

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