Fluids Exchanging System for Medical Use

• US 20120289895A1
• Filed: 03/27/2012
• Published: 11/15/2012
• Est. Priority Date: 03/28/2011
• Status: Active Grant

• Current Assignee: Micrel Medical Devices S.A.
• Original Assignee: Micrel Medical Devices S.A.
• Inventors: Tsoukalis, Achilleas
• Granted Patent: US 8,882,707 B2
• Time in Patent Office: Days
• US Class Current: 604/35
• CPC Class Codes: A61M 1/85 with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208
• CPC Class Codes: A61M 2025/0002 with a pressure sensor at the distal end
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0042 Microcatheters, cannula or the like having outside diameters around 1 mm or less
• CPC Class Codes: A61M 2025/0046 Coatings for improving slidability
• CPC Class Codes: A61M 2202/0464 Cerebrospinal fluid
• CPC Class Codes: A61M 25/0075 Valve means

Abstract

Fluids exchanging system for medical use comprising infusion and suction pumps having one flow higher than the other at certain time intervals, pump and catheter accessories with infusion and suction pipes leading to a common perforated dissolution cavity with elastic holes, however, with a body that swells or shrinks minimally responding to the potential pressure variations, and means for measuring the pressure at least inside the cavity.

Claims

1. A system for exchanging fluids in patients, comprising:

an infusion pumping system;

an aspiration pump;

an accessories set for the pumps; and

an implantable catheter comprising a perforated dialysis cavity communicating with the infusion and aspiration tubes in a communicating vessels manner.

2. A system for exchanging fluids in patients according to claim 1, wherein holes of said perforated cavity are elastic.

3. A system for exchanging fluids in patients according to claim 1, wherein a body of the dialysis cavity is manufactured for a high Δ

P/Δ

V, exhibiting low swelling in pressure and low shrinkage in vacuum.

4. A system for exchanging fluids in patients according to claim 1, wherein the infusion and aspiration pumps have protocols supporting continuous flow.

5. A system for exchanging fluids in patients according to claim 1, wherein an infusion flow rate (ml/hr) at periodical time segments is higher than the aspiration flow rate, or even at corresponding segments wherein the aspiration flow rate is higher than the infusion flow rate in order to generate a forced flow outwardly of, or inwardly to the cavity and clean the holes.

6. A system for exchanging fluids in patients according to claim 1, wherein the exchange of fluids in to bodily cavity is carried out, combining dialysis and forced circulation, and one or both of outwardly and inwardly at different times.

7. A system for exchanging fluids in patients according to claim 1, comprising a pressure sensor, wherein continuous measurement of pressure in the dialysis cavity aids in timely prediction of a partial or total occlusion of communicating holes of the dialysis cavity and triggers a cleaning protocol for the holes.

8. A system for exchanging fluids in patients according to claim 1, comprising a pressure sensor outside the dialysis cavity for making pressure comparisons inside as well as outside of the dialysis cavity and to deduce conclusions on alarms or notices of treating personnel.

9. A system for exchanging fluids in patients according to claim 1, wherein the catheter externally but also internally on the tubes carries a lubricating coating to prevent adhesion of particles onto tube surfaces.

10. A system for exchanging fluids in patients according to claim 1, wherein the catheter materials are compatible for surgical procedures on the central nervous system and cerebral cavity.

11. A system for exchanging fluids in patients according to claim 1, wherein the infusion and aspiration pumps have protocols supporting discontinuous or intermittent flow.

12. A system for exchanging fluids in patients, comprising:

an infusion pumping system;

an aspiration pump;

an accessories set for the pumps; and

an implantable catheter comprising a perforated dialysis cavity communicating with the infusion and aspiration tubes in a communicating vessels manner, wherein;

holes of said perforated cavity are elastic; and

a body of the dialysis cavity is configured for a high Δ

P/Δ

V, exhibiting low swelling in pressure and low shrinkage in vacuum.

13. A system for exchanging fluids in patients according to claim 12, wherein the exchange of fluids in a bodily cavity is carried out combining dialysis and forced circulation, and one or both of outwardly and inwardly at different times.

14. A system for exchanging fluids in patients according to claim 12, comprising a pressure sensor, wherein continuous measurement of pressure in the dialysis cavity aids in timely prediction of a partial or total occlusion of communicating holes of the dialysis cavity and triggers a cleaning protocol for the holes.

15. A system for exchanging fluids in patients according to claim 12, wherein materials of the catheter are compatible for surgical procedures on the central nervous system and cerebral cavity.

16. A system for exchanging fluids in patients, comprising:

an infusion pumping system;

an aspiration pump;

an accessories set for the pumps; and

an implantable catheter comprising a perforated dialysis cavity communicating with the infusion and aspiration tubes in a communicating vessels manner, wherein;

holes of said perforated cavity are elastic and configured to pressure-dilate in order to release entrapped material fragments and remove said fragments using fluid pressure either infusion pressure or aspiration pressure.

17. A system for exchanging fluids in patients according to claim 16, wherein a body of the dialysis cavity is fabricated for a high Δ

P/Δ

V, exhibiting low swelling in pressure and low shrinkage in vacuum.

18. A system for exchanging fluids in patients according to claim 16, wherein the exchange of fluids in a bodily cavity is carried out combining dialysis and forced circulation, and one or both of outwardly and inwardly at different times.

19. A system for exchanging fluids in patients according to claim 16, comprising a pressure sensor, wherein continuous measurement of pressure in the dialysis cavity aids in timely prediction of a partial or total occlusion of communicating holes of the dialysis cavity and triggers a cleaning protocol for the holes.

20. A system for exchanging fluids in patients according to claim 16, wherein materials of the catheter are compatible for surgical procedures on the central nervous system and cerebral cavity.