Probe for fluid leak detection with multiple layers

• US 8,288,607 B2
• Filed: 03/04/2009
• Issued: 10/16/2012
• Est. Priority Date: 03/14/2008
• Status: Active Grant

• Current Assignee: Gambro Lundia AB (Baxter International Inc.)
• Original Assignee: Gambro Lundia AB (Baxter International Inc.)
• Inventors: Court, Thierry, Goby, Jean Michel, Anselmet, Jean Pierre
• Primary Examiner(s): VU, QUYNH-NHU HOANG
• Application Number:
  US12/922,410
• Publication Number:
  US 20110071467A1
• Time in Patent Office: 1,322 Days
• Field of Search: 604/65, 604/361, 604/304, 604307-308, 600372-373, 600/382, 600/384, 600/386, 600/393, 600/396, 600/506, 600/547, 340/605, 340/618, 340/620
• US Class Current: 604/361
• CPC Class Codes: A61F 13/42 with wetness indicator or alarm
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

A disposable medical probe for detecting a leak of physiological fluid comprising: a support layer, a conductive layer on top of the support layer, the conductive layer comprising two conducting electrodes both placed exclusively on each side of a longitudinal axis, a hydrophilic layer on top of at least a part of the conductive layer, where the conductive layer defines two zones: a proximal zone where two proximal electrode parts being are placed parallel to each other and being spaced apart by a distance d, and a distal zone where two distal electrode parts are symmetrical with respect to said longitudinal axis and are spaced apart from each other by a gap e greater than said distance d.

Claims

1. A disposable medical probe for detecting a leak of physiological fluid through an opening made in the human body, by operating in conjunction with an electrical detection circuit, comprising the following layers:

a support layer;

a conductive layer on top of the support layer, the conductive layer comprising first and second conducting electrodes, said first conducting electrode being placed on one side of a longitudinal axis and said second conducting electrode being placed on the opposite side of the longitudinal axis; and

a hydrophilic layer, configured to receive a physiological fluid, said hydrophilic layer being configured on top of at least a part of the conductive layer,

where the conductive layer defines the following zones;

a proximal zone, the end of which is configured to be connected to said electrical circuit, said proximal zone comprising a proximal part of each of the first and second electrodes, the proximal parts of the first and second electrodes being placed parallel to each other and spaced apart by a distance, and

a distal zone configured to contact the physiological fluid, said distal zone comprising a distal part of each of the first and second electrodes, the distal parts of the first and second electrodes being symmetrical with respect to said longitudinal axis and being spaced apart from each other by a gap, said gap being greater than said distance, wherein the hydrophilic layer covers only the distal zone of the conductive layer.

2. A probe according to claim 1, wherein the hydrophilic layer covers the distal zone of the conductive layer.

3. A probe according to claim 1, wherein the hydrophilic layer entirely covers the distal zone of the conductive layer.

4. A probe according to claim 1, comprising a covering layer configured to contact a patient'"'"'s skin, on top of at least a part of the conductive layer.

5. A probe according to claim 4, wherein an edge of the covering layer, said edge covering the distal zone of the conductive layer, is perpendicular to the longitudinal axis of the first and second electrodes.

6. A probe according to claim 4, wherein the covering layer is placed on top of substantially the entire proximal zone of the conductive layer.

7. A probe according to claim 1, wherein the covering layer extends over a portion of the distal zone of the conductive layer.

8. A probe according to claim 1, wherein the covering layer contacts substantially the entire proximal zone of the conductive layer and is superimposed on and in contact with a portion of the hydrophilic layer.

9. A probe according to claim 1, wherein the proximal parts of the first and second electrodes are also symmetrical with respect to said longitudinal axis.

10. A probe according to claim 1, wherein the longitudinal axis of the distal parts of the at least first and second electrodes also represents an axis of symmetry of the probe.

11. A probe according to claim 1, said probe being a longitudinal probe extending along said longitudinal axis.

12. A probe according to claim 1, wherein the length of the proximal zone of the conductive layer is greater than the length of the distal zone of the conductive layer.

13. A probe according to claim 12, wherein the length of the proximal zone of the conductive layer is approximately twice the length of the distal zone of the conductive layer.

14. A probe according to claim 1, wherein the materials from which each layer is made are flexible materials.

15. A probe according to claim 1, wherein the first and second electrodes are in the form of conducting strips of substantially constant width.

16. A probe according to claim 1, wherein one face of the support layer is covered with adhesive and is configured to be fixed to one face of the conductive layer and to a portion of one face of the hydrophilic layer that is in direct contact with said one face of the support layer.

17. A probe according to claim 1, wherein one face of the covering layer is covered with adhesive and is configured to be fixed to at least a part of one face of the conductive layer'"'"'s proximal zone and is configured to be fixed to a part of one face of the hydrophilic layer.

18. A probe according to claim 1, wherein the distal zone of the conductive layer exhibits an increase in the gap between the distal parts of the first and second electrodes running in the direction from a border between the proximal and the distal zones to the distal end of the distal zone.

19. A probe according to claim 18, wherein the increase in the gap between the distal parts of the first and second electrodes has a frustoconical shape.

20. A probe according to claim 19, wherein the truncated cone of the frustoconical shape is followed by first and second parallel portions of the distal parts of the first and second electrodes.

21. A probe according to claim 18, wherein the increase in the gap between the distal parts of the first and second electrodes has a curved shape.

22. A probe according to one of claim 18, wherein the increase in the gap from said border to said distal end is followed by a decrease in the gap between the distal parts of the first and second electrodes.

23. A probe according to claim 22, wherein the shape of the distal parts of the first and second is inscribed on an ellipse, the major axis of which is the longitudinal axis of the conductive layer.

24. A probe according to claim 1, further comprising the following two zones:

a proximal probe part and a distal probe part, where the proximal probe part is superimposed with the proximal zone of the conductive layer, and the distal probe part is superimposed with the distal zone of the conductive layer.

25. A probe according to claim 24, wherein a greater width of the distal part of the probe is substantially twice the constant width of the proximal part of the probe.

26. A probe according to claim 24, wherein the edges of the distal part of the probe have a substantially elliptical shape.

27. A probe according to claim 24, wherein the edges of the distal part of the probe have a substantially rectangular shape.

28. A probe according to claim 24, wherein at least one notch is made on an edge of the distal part of the probe.

29. A probe according to claim 28, wherein at least said notch is placed on an axis among the following:

the longitudinal axis of the probe, and an axis perpendicular to the longitudinal axis of the probe and passing substantially through the middle of the proximal zone of the probe.

30. A probe according to claim 1, comprising a capacitor layer positioned between the support layer and the conductive layer, comprising:

a conductive first capacitor layer placed on the support layer; and

an insulating second capacitor layer placed on the conductive first capacitor layer.

31. A probe according to claim 30, wherein the conductive first capacitor layer and the insulating second capacitor layer make up a single part having a conducting face and an insulating face.

32. A probe according to claim 30, wherein the capacitor layer at least partially covers the distal zone of the conductive layer.

33. A probe according to claim 32, wherein the capacitor layer covers a portion of the distal zone of the conductive layer in which a gap between the distal parts of the first and second electrodes is the greatest.

34. A probe according to claim 1, wherein the probe is sterilized.