MICRO-DIALYSIS PROBE

• US 20110066103A1
• Filed: 11/22/2010
• Published: 03/17/2011
• Est. Priority Date: 08/06/1999
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics International AG (Roche Holding AG)
• Inventors: Ehwald, Rudolf, Thomas, Andreas, Uwe, Beyer
• Granted Patent: US 8,235,936 B2
• Time in Patent Office: Days
• 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 comprising:

a proximal probe opening providing access to a supply line and a drainage line;

a distal probe tip for introducing the probe into tissue;

a supply line having a dialysis opening in the vicinity of the probe tip;

two drainage lines formed within a hollow fiber, the hollow fiber being exposed to surrounding tissue in the vicinity of the probe tip;

a dialysis section being formed between the supply line and the two drainage lines in the area of the supply line dialysis opening and the exposure of the hollow fiber to surrounding tissue,

wherein a solution flowing through the supply line experiences an inversion in the area of the dialysis section and between the supply line and the two drainage lines,

the supply line and two drainage lines together forming a probe shaft, the supply line and the two drainage lines being arranged as separate hollow channels of the probe shaft.

2. The micro-dialysis probe of claim 1, further comprising an extended dialysis section extending from the probe shaft to the probe tip and within both the supply line and the drainage line.

3. The micro-dialysis probe of claim 1, wherein the two drainage lines unite in an end area of the probe shaft.

4. The micro-dialysis probe of claim 3, wherein the single drainage line is accommodated by a drainage hose inserted in the end area of the probe shaft.

5. The micro-dialysis probe of claim 1, wherein the supply line is accommodated by a supply hose inserted in the probe shaft.

6. A micro-dialysis probe comprising:

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

a hollow fiber forming a supply line for introducing solution into the probe and a drainage line, the supply line and drainage line being arranged as separate hollow channels of the probe shaft and together being formed by the shaft itself, the supply line and the drainage line extending substantially side-by-side, wherein the drainage line portion of the hollow fiber is exposed to surrounding tissue in the area of the dialysis section;

a supporting profile inserted into the hollow fiber, the supporting profile separating the supply line from the drainage line, the supporting profile having at least one overflow opening, the liquid flowing from the supply line into the drainage line in the area of the overflow opening, the liquid there experiencing an inversion.

7. The micro-dialysis probe of claim 6, wherein the probe tip is pointed and sealed with a sealing material.

8. The micro-dialysis probe of claim 6, wherein the exposed drainage line portion of the hollow fiber is partly surrounded by a tube, wherein the tube includes recesses for providing for the exposed portion of the drainage line.

9. The micro-dialysis probe of claim 8, wherein the hollow fiber forming the supply line and the drainage line, together with the tube surrounding at least the drainage line portion of the hollow fiber, are fixed to one another using a fixing material in the area of the probe shaft between the proximal probe opening and the dialysis section.

10. The micro-dialysis probe of claim 8, wherein a section of the tube lies over the hollow fiber in the area of the probe tip and thereby forms a supporting section for the hollow fiber.

11. The micro-dialysis probe of claim 6, wherein the drainage line penetrates into the supply line at an overflow opening proximally of the 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 inversion, while proximally of the inversion the hollow fiber is sealed in a tube surrounding the drainage line.

12. The micro-dialysis probe of claim 6, wherein the hollow fiber is formed to be replaceable.

13. The micro-dialysis probe of claim 6, wherein the dialysis section is in the vicinity of the probe tip.

14. The micro-dialysis probe of claim 6, wherein the solution comprises a drip-feed solution.

15. A micro-dialysis probe comprising:

a proximal probe opening providing access to a supply line and a drainage line;

a distal probe tip for introducing the probe into subcutaneous tissue;

a supply line for introducing solution into the probe, a drainage line;

a dialysis section being formed along each of the supply line and drainage line and between the supply line and the drainage line;

the solution flowing through the supply line in a flow direction, the flow direction being reversed in an area of between the supply line and the drainage line.

16. The micro-dialysis probe of claim 15, wherein the probe tip is pointed and sealed with a sealing material.

17. The micro-dialysis probe of claim 15, wherein the supply line and the drainage line are fixed to one another using a fixing material in the area of the probe shaft between the proximal probe opening and the dialysis section.

18. The micro-dialysis probe of claim 15, 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.

19. The micro-dialysis probe of claim 18, wherein the supply line and the drainage line, together with the tube surrounding the drainage line, are fixed to one another using a fixing material in the area of the probe shaft between the proximal probe opening and the dialysis section.

20. The micro-dialysis probe of claim 15, wherein the drainage line penetrates into the supply line proximally of the 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 inversion, while proximally of the inversion the drainage line is sealed in a tube surrounding the drainage line.

21. The micro-dialysis probe of claim 15, wherein a section of a tube lies over the drainage line in the area of the probe tip and thereby forms a supporting section for the drainage line.

22. The micro-dialysis probe of claim 21, wherein the supply line and supporting section together form an outer framework that shields the drainage line from surrounding tissues.

23. The micro-dialysis probe of claim 15, further comprising a primary dialysis section in the area of flow inversion between the supply line and the drainage line.

24. The micro-dialysis probe of claim 15, wherein the supply line is accommodated by a supply hose inserted in the probe shaft.

25. The micro-dialysis probe of claim 15, wherein the supply line receives a solution comprising a drip-feed solution.

26. The micro-dialysis probe of claim 15, wherein the drainage line comprises two drainage channels.

27. The micro-dialysis probe of claim 15, wherein the drainage line is accommodated by a drainage hose inserted in the probe shaft.