Micro-dialysis probe

• US 8,235,936 B2
• Filed: 11/22/2010
• Issued: 08/07/2012
• Est. Priority Date: 08/06/1999
• Status: Expired due to Term

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics International AG (Roche Holding AG)
• Inventors: Ehwald, Rudolf, Beyer, Uwe, Thomas, Andreas
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US12/951,391
• Publication Number:
  US 20110066103A1
• Time in Patent Office: 624 Days
• Field of Search: 604 26- 29, 604/43, 604/93, 604/96, 604/264, 604/44, 604/113, 604/366, 604/523, 604/4.01, 604 501- 504, 604/6.09, 604/6.16, 606/108, 606/193, 606/195
• US Class Current: 604/43
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06
• CPC Class Codes: A61B 5/14528 invasively

Abstract

A micro-dialysis probe extending longitudinally between a proximal probe opening and a distal probe tip and having a supply line and a drainage line for a drip-feed solution. A tube may be provided for supporting the drainage line. A dialysis section, wherein the flow channel for the drip-feed solution experiences an inversion, is formed generally between the supply line and the drainage line, in the vicinity of the distal probe tip. The supply line and the drainage line are respectively arranged substantially side by side and together form the probe shaft of the micro-dialysis probe.

Claims

1. A micro-dialysis probe for introducing a solution into surrounding tissue, comprising:

a probe shaft having a proximal end and a distal probe tip;

a hollow fiber forming part of the probe tip, and forming a drainage line, the drainage line having a dialysis section for providing the solution to the surrounding tissue;

a supply line for providing the solution to the drainage line, the supply line and drainage line being arranged as separate hollow channels which extend substantially side-by-side; and

an opening provided between the supply line and the drainage line in the area of the dialysis section such that the solution which flows from the supply line into the drainage line in the area of the opening experiences a flow inversion.

2. The micro-dialysis probe of claim 1, further comprising a sealing material which both forms part of and seals the probe tip.

3. The micro-dialysis probe of claim 1, wherein the dialysis section is in the vicinity of the probe tip.

4. The micro-dialysis probe of claim 1, wherein the solution comprises a drip-feed solution.

5. The micro-dialysis probe of claim 1, further comprising a tube which surrounds a portion of the drainage line of the hollow fiber.

6. The micro-dialysis probe of claim 1, further comprising a tube in which the hollow fiber is sealed therein proximally of the area of the flow inversion.

7. The micro-dialysis probe of claim 1, wherein the drainage line penetrates into the supply line at the opening proximally of the area of the flow inversion, the drainage line being fixed in the area of the probe tip such that a linear course of flow is achieved distal of the area of the flow inversion.

8. The micro-dialysis probe of claim 1, wherein the supply line and the drainage line are fixed to one another using a fixing material in an area between the opening and the dialysis section.

9. The micro-dialysis probe of claim 1, further including a tube surrounding at least the drainage line, the tube having recesses to expose the drainage line to surrounding tissue in the vicinity of the probe tip.

10. The micro-dialysis probe of claim 1, further comprising a tube wherein a section of a tube lies over the drainage line in the area of the probe tip which forms a supporting section for the drainage line.

11. The micro-dialysis probe of claim 1, further comprising a tube wherein the supply line and tube together form an outer framework that shields the drainage line from the surrounding tissues.

12. The micro-dialysis probe of claim 1, wherein the hollow fiber forms both part of the supply line and the drainage line.

13. The micro-dialysis probe of claim 1, further comprising a supporting profile which forms part of the probe tip.

14. The micro-dialysis probe of claim 1, wherein the hollow fiber is pointed at the probe tip.

15. The micro-dialysis probe of claim 1, further comprising a supporting profile provided in the hollow fiber to form both another part of the supply line and the drainage line.

16. The micro-dialysis probe of claim 1, wherein the drainage line comprises two drainage channels which re-unite adjacent the proximal end of the probe shaft.

17. The micro-dialysis probe of claim 1, further comprises a supply hose provided to the probe shaft and fluidly connected to the supply line.

18. The micro-dialysis probe of claim 1, further comprises a drainage hose provided to the probe shaft and fluidly connected to the drainage line.

19. The micro-dialysis probe of claim 1, wherein the dialysis section extends from the probe shaft to the probe tip.

20. The micro-dialysis probe of claim 1, wherein the hollow fiber also forms part of the supply line.

21. The micro-dialysis probe of claim 1, wherein the hollow fiber also forms part of the supply line, the supply line also having a dialysis section.

22. The micro-dialysis probe of claim 1, wherein the hollow fiber also forms part of the supply line, the supply line also having a dialysis section, and wherein the dialysis section of each the supply line and the drainage line extends from the probe shaft to the probe tip.

23. The micro-dialysis probe of claim 1, wherein the hollow fiber is replaceable.

24. The micro-dialysis probe of claim 1, wherein the hollow fiber extends longitudinally between the proximal end and the distal probe tip.

25. The micro-dialysis probe of claim 1, wherein a tube surrounds the drainage line for supporting the drainage line.

26. The micro-dialysis probe of claim 1, further comprising a sealing material which both forms part of the probe tip and defines part of the opening.

27. The micro-dialysis probe of claim 1, further comprising a sealing material and a supporting profile both provided in the hollow fiber to form both another part of the supply line and the drainage line and to define the opening.

28. The micro-dialysis probe of claim 1, wherein the hollow fiber forms a part of both the drainage line and the supply line as well as an outer wall of the probe.

29. The micro-dialysis probe of claim 1, further comprising a supporting profile provided in the hollow fiber and configured such that the volume of the hollow fiber through which the flow of the solution passes consists of a number of the separate hollow channels.

30. The micro-dialysis probe of claim 1, further comprising a supporting profile provided in the hollow fiber and having a three-armed star shape or a four-armed star.

31. The micro-dialysis probe of claim 1, further comprising a supporting profile provided in the hollow fiber and having a flat shape with a rectangular cross-section or a lenticular cross-section, and being provided on one or both of its flat sides with fine bristles or knobs to support the hollow fiber.

32. The micro-dialysis probe of claim 1, wherein the probe shaft forms part of the supply line and the drainage line.

33. The micro-dialysis probe of claim 1, further comprising a supporting profile provided in the hollow fiber, wherein a center of the supporting profile defines the opening.

34. The micro-dialysis probe of claim 1, further comprising a supporting profile provided in the hollow fiber and a sealing material, wherein the profile is sealed together with the hollow fiber at the probe tip by the sealing material.

35. The micro-dialysis probe of claim 1, wherein the hollow fiber is configured to be exposed to the surrounding tissue along its entire length.