Fluids exchanging system for medical use

• US 8,882,707 B2
• Filed: 03/27/2012
• Issued: 11/11/2014
• 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
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): Eisenberg, Rebecca E
• Application Number:
  US13/431,362
• Publication Number:
  US 20120289895A1
• Time in Patent Office: 959 Days
• Field of Search: 604/19, 604/131, 604118-121
• US Class Current: 604/118
• 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

A fluids exchanging system for medical use is provided. The system comprises an infusion pumping system, an aspiration pump, and an implantable catheter comprising a perforated dialysis cavity communicating with infusion and aspiration tubes in a communicating vessel manner. The implantable catheter further includes elastic holes.

Claims

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

an infusion pumping system;

an aspiration pump; and

an implantable catheter comprising a perforated dialysis cavity communicating with infusion and aspiration tubes in a communicating vessels manner and including holes in a cavity casing, wherein the holes of said perforated dialysis cavity are elastic and configured to pressure dilate and the cavity casing includes an internal protector configured to maintain the volume of the perforated dialysis cavity.

2. A system for exchanging fluids in patients according to claim 1, wherein a body of the dialysis cavity is manufactured for a high ratio of differential pressure to differential volume (Δ

P/Δ

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

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

4. 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 an 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 out of or into the dialysis cavity and to clean the holes.

5. A system for exchanging fluids in patients according to claim 1, wherein the exchange of fluids in a bodily cavity is carried out by combining dialysis and forced circulation, wherein the fluid is being removed from the body or infused into the body of a patient at different times.

6. 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 prediction of a partial or total occlusion of communicating holes of the dialysis cavity and triggers a cleaning protocol for the holes.

7. 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 triggering an alarm to alert treating personnel in case of undesirable resulted pressure comparisons.

8. A system for exchanging fluids in patients according to claim 1, wherein the catheter carries a lubricating coating on catheter interior and exterior tubes to prevent adhesion of particles onto tube surfaces.

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

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

an infusion pumping system;

an aspiration pump; and

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

the holes of said perforated cavity are elastic and configured to pressure dilate such that the circumference of each of the holes is variable; and

a body of the dialysis cavity is configured for a high ratio of differential pressure to differential volume (Δ

P/Δ

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

11. A system for exchanging fluids in patients according to claim 10, wherein the exchange of fluids in a bodily cavity is carried out by combining dialysis and forced circulation, wherein the fluid is being removed from the body or infused into the body of a patient at different times.

12. A system for exchanging fluids in patients according to claim 10, comprising a pressure sensor, wherein continuous measurement of pressure in the dialysis cavity aids in prediction of a partial or total occlusion of communicating holes of the dialysis cavity and triggers a cleaning protocol for the holes.

13. A system for exchanging fluids in patients according to claim 10, wherein the implantable catheter includes a cavity casing comprising an internal protector configured to maintain the volume of the perforated dialysis cavity.

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

an infusion pumping system;

an aspiration pump; and

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

the 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.

15. A system for exchanging fluids in patients according to claim 14, wherein a body of the dialysis cavity is fabricated for a high ratio of differential pressure to differential volume (Δ

P/Δ

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

16. A system for exchanging fluids in patients according to claim 14, wherein the exchange of fluids in a bodily cavity is carried out by combining dialysis and forced circulation, wherein the fluid is being removed from the body or infused into the body of a patient at different times.

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

18. A system for exchanging fluids in patients according to claim 14, wherein the implantable catheter includes a cavity casing comprising an internal protector configured to maintain the volume of the perforated dialysis cavity.