Patent US1854132A successfully refreshed from Google Patents.
US3707967A
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Steady flow regenerative peritoneal dialysis system and method
Assignee: Tecna Corp
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Filing: 1970-10-01
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Granted: 1973-01-02
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Expires: 1990-10-01
Abstract
Abstract A steady-flow regenerative peritoneal dialysis system and method making use of permanent percutaneous tubes extending into the abdominal cavity and means for circulating a dialysate through the abdominal cavity and reconstituting the dialysate.
Inventors
- 👤 S Kitrilakis
- 👤 T Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:27
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/28; A61M1/16; A61M1/1654; A61M1/1656; A61M1/1674; A61M1/1694; A61M1/1696; A61M1/281; A61M1/282; A61M1/284; A61M1/285
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
A steady flow peritoneal dialysis system including in-flow and out-flow conduits adapted to extend through the abdominal wall into the abdominal cavity whereby dialysate fluid may be introduced into and removed from the cavity, each of said conduits including an external surface portion at the interface between the abdominal wall and the conduits which is compatible with the skin, subcutaneous tissue and other tissue, said surface including a plurality of adjacent substantially discrete pockets having openings which face in the direction of said skin and tissue, the walls of said pocket extending inwardly to a depth in the range of 0.002 to 0.020 inches and being of such shape and size as to provide means to accommodate a number of living cells sufficient to provide anchoring but not so large as to prevent essentially normal transfer of nutrients to the living cells in said pockets from adjacent skin and tissue, means for supplying the dialysate fluid to said in-flow conduit, means for causing the dialysate fluid to flow through the cavity, and means for removing the dialysate fluid from said out-flow conduit.
Claim 2
Dependent Claim
182 words
A steady flow peritoneal dialysis system including in-flow and out-flow conduits adapted to extend through the abdominal wall into the abdominal cavity whereby dialysate fluid may be introduced into and removed from the cavity, each of said conduits including an external surface portion at the interface between the abdominal wall and the conduits which is compatible with the skin, subcutaneous tissue and other tissue, said surface including a plurality of adjacent substantially discrete pockets having openings which face in the direction of said skin and tissue, the walls of said pocket extending inwardly to a depth in the range of 0.002 to 0.020 inches and being of such shape and size as to provide means to accommodate a number of living cells sufficient to provide anchoring but not so large as to prevent essentially normal transfer of nutrients to the living cells in said pockets from adjacent skin and tissue, means for supplying the dialysate fluid to said in-flow conduit, means for causing the dialysate fluid to flow through the cavity, and means for removing the dialysate fluid from said out-flow conduit.
Claim 3
Dependent Claim
19 words
A system as in claim 1 in which said means for causing fluid to flow comprises a sealed pump.
Claim 4
Dependent Claim
17 words
A system as in claim 1 in which said supply and removal means includes a flow regulator.
Claim 5
Dependent Claim
23 words
A system as in claim 1 in which said supply means includes a dialysate fluid source and said removal means includes a sink.
Claim 6
Dependent Claim
30 words
A system as in claim 1 in which said supply and removal means includes means for reconstituting the dialysate fluid connected by fluid conduits to said inflow and out-flow conduits.
Claim 7
Dependent Claim
22 words
A system as in claim 5 in which said reconstitution means includes a column for the removal of uric acid and creatinine.
Claim 8
Dependent Claim
16 words
A system as in claim 5 including means for irradiating the circulatory fluid with ultra-violet radiation.
Claim 9
Dependent Claim
24 words
A system as in claim 7 in which said reconstitution means includes a filter adapted to receive the fluid flowing from the irradiation means.
Claim 10
Dependent Claim
16 words
A system as in claim 5 in which said system is a closed self-contained fluid system.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |