Method and device for use in micturition studies

1. Method for the sensing of the electromyographic activity of an individual's bladder detrusor muscle, wherein

an elongated electrode is inserted through the individual's urethra, so that the proximal end of the electrode becomes positioned in the bladder, and

the bladder is charged with a fluid having electrical conductivity, and

the electrical potential of the detrusor muscle, mediated by the fluid, is sensed by the electrode.

2. The method according to claim 1 , wherein the electrode is inserted by use of a protective tube.

3. The method according to claim 2 , wherein the proximal end of the electrode is protected by the protective tube during the insertion step, and said proximal end is released from the protective tube when located in the desired position.

4. The method according to claim 2 , wherein the bladder is charged with the fluid through the channel of the protective tube.

5. The method according to claim 4 , wherein the fluid is charged by use of a protective tube having an additional channel for the discharge.

6. A method according to claim 2 , wherein the bladder pressure is sensed simultaneously by a pressure probe, located on the protective tube at a position so as to become positioned inside the bladder.

7. A method according to claim 2 , wherein the electromyographic activity of the urethral sphincter is sensed simultaneously by one or more electrodes arranged on the outer side of the protective tube at a position so as to come in contact with the external urethral sphincter when the protective tube is properly inserted.

8. The method according to claim 7 , wherein the bladder pressure is sensed simultaneously by a pressure probe located on the protective tube at a position so as to become positioned inside the bladder.

9. The method according to claim 1 , wherein the fluid is an aqueous electrolyte solution.

10. A device for the recording of the electromyographic activity of an individual's bladder detrusor muscle, wherein said device is intended to be inserted through the individual's urethra, said device comprising

an elongated electrode adapted to sense electromyographic activity of the detrusor muscle, said electromyographic activity being mediated by an electrically conductive fluid in the bladder, said electrode being an elongated threadlike body made of a metal or metal alloy, the proximal end of said electrode being adapted to to be received in the bladder, and

a distal end, and

means for recording the electrical activity sensed by the electrode.

11. The device according to claim 10 , comprising a protective tube surrounding the electrode.

12. The device according to claim 11 , comprising a plunger, arranged to be longitudinally movable in the protective tube, said plunger having a proximal end adapted to receive the electrode.

13. The device according to claim 11 , wherein the protective tube has at least two parallel channels.

14. The device according to claim 11 , wherein a pressure probe, intended for sensing the bladder pressure, is arranged on the outer side of the protective tube.

15. The device according to claim 14 , comprising means for recording the bladder pressure sensed by the pressure probe.

16. The device according to claim 11 , wherein at least one electrode, intended for sensing the electromyographic activity of the urethral sphincter, is arranged on the outer side of the protective tube.

17. The device according to claim 16 , wherein a pressure probe, intended for sensing the bladder pressure, is arranged on the outer side of the protective tube.

18. The device according to claim 17 , comprising means for recording the bladder pressure sensed by the pressure probe and means for recording the electromyographic activity of the urethral sphincter, sensed by the electrode.

19. The device according to claim 16 , comprising means for recording the electromyographic activity of the urethral sphincter, sensed by the electrode.