Patent FR530407A successfully refreshed from Google Patents.
US3712474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artifical kidney apparatus
Assignee: Baxter International Inc
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Filing: 1970-04-08
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Granted: 1973-01-23
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Expires: 1990-04-08
Abstract
Abstract An artificial kidney apparatus providing a blood compartment which is entirely self-contained within its own structure. The apparatus further provides, in the self-contained assembly, structure to vary the positive pressure within a dialysate chamber and the pressure gradient across the diffusion membrane. Improved connector units provide uniform blood distribution into the diffusion membrane.
Inventors
- 👤 F Martinez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:10
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D63/00; B01D63/10; F; F16; F16L; F16L47/00; F16L47/06; F16L47/065; F16L5/00; F16L5/02; F16L5/10; B01D2313/00; B01D2313/68
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
239 words
An artificial kidney coil comprising, in combination, an outer casing member closed at one end by an end plate; a core element received within said member, and means for supporting said element in a position defining a space between the sides of said element and said member; means associated with said end plate for connecting said space to a source of pressurized liquid dialysate; a length of dialyzing tube membrane and a supporting screen wrapped together about said element within said space; connection means for connecting one end of said tube membrane to an inflow of biological fluid and for connecting the other end of said tube membrane for outflow of biological fluid; means for closing a first core element end proximate to said means for connecting to a source of liquid dialysate, and for deflecting and substantially uniformly distributing the liquid dialysate through said space and about said tube membrane, whereby dialysis of the biological fluid is accomplished; conduit means in the form of an annular ring at a second core element end remote from said dialysate connecting means for withdrawing dialysate from said space through a plurality of spaced openings; and means including a second annular ring juxtaposed to the first annular ring, said second annular ring including a like plurality of spaced openings, and said annular rings being relatively movable to restrict the flow of dialysate through said conduit means to control pressure within said space.
Claim 2
Dependent Claim
239 words
An artificial kidney coil comprising, in combination, an outer casing member closed at one end by an end plate; a core element received within said member, and means for supporting said element in a position defining a space between the sides of said element and said member; means associated with said end plate for connecting said space to a source of pressurized liquid dialysate; a length of dialyzing tube membrane and a supporting screen wrapped together about said element within said space; connection means for connecting one end of said tube membrane to an inflow of biological fluid and for connecting the other end of said tube membrane for outflow of biological fluid; means for closing a first core element end proximate to said means for connecting to a source of liquid dialysate, and for deflecting and substantially uniformly distributing the liquid dialysate through said space and about said tube membrane, whereby dialysis of the biological fluid is accomplished; conduit means in the form of an annular ring at a second core element end remote from said dialysate connecting means for withdrawing dialysate from said space through a plurality of spaced openings; and means including a second annular ring juxtaposed to the first annular ring, said second annular ring including a like plurality of spaced openings, and said annular rings being relatively movable to restrict the flow of dialysate through said conduit means to control pressure within said space.
Claim 3
Dependent Claim
210 words
An artificial kidney coil comprising, in combination, an outer casing member closed at one end by an end plate; a core element received within said member, and means including a pair of flanges carried between said casing and core element for supporting said element in a position defining a space between the sides of said element and said member; means associated with said end plate for connecting said space to a source of pressurized liquid dialysate; a length of dialyzing tube membrane and a supporting screen wrapped together about said element within said space; connection means for connecting one end of said tube membrane to an inflow of biological fluid and for connecting the other end of said tube membrane for outflow of biological fluid; means for closing a first core element end proximate to said means for connecting to a source of liquid dialysate, and for deflecting and substantially uniformly distributing the liquid dialysate through said space and about said tube membrane, whereby dialysis of the biological fluid is accomplished; conduit means at a second core element end remote from said dialysate connecting means for withdrawing dialysate from said space; and means to restrict the flow of dialysate through said conduit means to control the pressure within said space.
Claim 4
Dependent Claim
210 words
An artificial kidney coil comprising, in combination, an outer casing member closed at one end by an end plate; a core element received within said member, and means including a pair of flanges carried between said casing and core element for supporting said element in a position defining a space between the sides of said element and said member; means associated with said end plate for connecting said space to a source of pressurized liquid dialysate; a length of dialyzing tube membrane and a supporting screen wrapped together about said element within said space; connection means for connecting one end of said tube membrane to an inflow of biological fluid and for connecting the other end of said tube membrane for outflow of biological fluid; means for closing a first core element end proximate to said means for connecting to a source of liquid dialysate, and for deflecting and substantially uniformly distributing the liquid dialysate through said space and about said tube membrane, whereby dialysis of the biological fluid is accomplished; conduit means at a second core element end remote from said dialysate connecting means for withdrawing dialysate from said space; and means to restrict the flow of dialysate through said conduit means to control the pressure within said space.
Claim 5
Dependent Claim
22 words
The artificial kidney of claim 2 in which said conduit means includes a plurality of ports defined in one of said flanges.
Claim 6
Dependent Claim
21 words
The artificial kidney of claim 3 in which both of said pair of flanges have a plurality of ports defined therein.
Claim 7
Dependent Claim
72 words
The artificial kidney of claim 3 in which said means to restrict flow comprises a valving flange carried between said casing and core element and located beside said one flange and in essential contact therewith, said valving flange defining a plurality of ports therein, said valving flange anD said one flange being relatively rotatable to bring their respective ports into and out of registration for respectively permitting or restricting flow of dialysate.
Claim 8
Dependent Claim
71 words
The artificial kidney of claim 5 in which said tube membrane connection means comprises, at each end of said tube membrane, a connector member comprising a body elongated in one direction and including a transverse bore, and a biological fluid flow tube supported within said bore, said tube membrane being confined about the periphery of said body, providing closed fluid connection between said tube membrane and each biological fluid flow tube.
Claim 9
Dependent Claim
44 words
The artificial kidney of claim 6 in which said tube membrane is confined about the periphery of said body by a surrounding, relatively inflexible cup member having a closed end with an opening defined therein, said biological fluid flow tube passing through said opening.
Claim 10
Dependent Claim
15 words
The artificial kidney of claim 7 in which said body is fabricated of silicone rubber.
Claim 11
Dependent Claim
168 words
In combination with an artificial kidney coil comprising an inner core and an outer casing providing an open space within which is spirally and supportingly wrapped a sheath-like dialysis membrane conduit, a connector member for connecting one end of said sheath-like conduit to a relatively less flexible and smaller tube, said connector comprising a body having a relatively flat upper surface and being substantially longer in one direction than in the direction perpendicular thereto, said body also including a bore which is normal to said upper surface, means for supporting said tube within said bore with its end disposed substantially at said upper surface, a plurality of grooves in said body upper surface communicating with said bore and emanating radially generally toward the elongated end of said body, and means for confining said sheath-like conduit around said body providing a closed fluid connection between said tube and conduit, said last mentioned means being carried by one of said inner core and outer casing of said artificial kidney coil.
Claim 12
Dependent Claim
168 words
In combination with an artificial kidney coil comprising an inner core and an outer casing providing an open space within which is spirally and supportingly wrapped a sheath-like dialysis membrane conduit, a connector member for connecting one end of said sheath-like conduit to a relatively less flexible and smaller tube, said connector comprising a body having a relatively flat upper surface and being substantially longer in one direction than in the direction perpendicular thereto, said body also including a bore which is normal to said upper surface, means for supporting said tube within said bore with its end disposed substantially at said upper surface, a plurality of grooves in said body upper surface communicating with said bore and emanating radially generally toward the elongated end of said body, and means for confining said sheath-like conduit around said body providing a closed fluid connection between said tube and conduit, said last mentioned means being carried by one of said inner core and outer casing of said artificial kidney coil.
Claim 13
Dependent Claim
59 words
The combination of claim 9 wherein said last mentioned means comprises a relatively inflexible cup member having an opening within the closed end, said body received within said cup member in a manner such that said tube passes without said cup member through said opening, and said sheath-like conduit is secured between said elastomeric body and said cup member.
Claim 14
Dependent Claim
38 words
The combination of claim 10 wherein the cup side opposed to said opening is contoured to provide a smooth continuation of the surface of said one of said inner core and outer casing of said artificial kidney coil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |