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US3707967A Expired / Lapsed US ⏱️ 0.0 years remaining

Steady flow regenerative peritoneal dialysis system and method

Assignee: Tecna Corp
•
Filing: 1970-10-01
•
Granted: 1973-01-02
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Expires: 1990-10-01
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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)

US3314420A Cited
US3520298A Cited
US3545438A Cited
US3605123A Cited

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

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