Uterine contraction detection and initiation system and method

• US 6,879,858 B1
• Filed: 11/25/1998
• Issued: 04/12/2005
• Est. Priority Date: 11/25/1998
• Status: Expired due to Fees

• Current Assignee: Reproductive Health Technologies, Inc.
• Original Assignee: Reproductive Health Technologies, Inc.
• Inventors: Adams, John M.
• Primary Examiner(s): Getzow, Scott M.
• Application Number:
  US09/199,854
• Time in Patent Office: 2,330 Days
• Field of Search: 607/39, 607/62, 607/138
• US Class Current: 607/39
• CPC Class Codes: A61B 17/3415 for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06
• CPC Class Codes: A61B 2017/4216 Operations on uterus, e.g. endometrium
• CPC Class Codes: A61B 2503/02 Foetus
• CPC Class Codes: A61B 5/296 for electromyography [EMG]
• CPC Class Codes: A61B 5/391 of genito-urinary organs
• CPC Class Codes: A61B 5/6848 Needles
• CPC Class Codes: A61B 5/6882 Anchoring means
• CPC Class Codes: A61N 1/36007 of urogenital or gastrointestinal organs, e.g. for incontinence control

Abstract

A system and method for detecting for and initiating contractions of a uterus of a human patient employs a sensor for sensing electrical activity of the uterus of the patient. Data from the sensed electrical activity is stored in memory. A processor accesses the stored data for analysis. Electrical energy is applied to the uterus to initiate a uterine contraction when the analyzed data fails to satisfy predetermined detection criteria.

Claims

1. A method of detecting for uterine contractions of a uterus of an animal having a body to initiate uterine contractions when uterine contractions are absent, the method including the steps of:

placing first and second electrodes in contact with the body, the first electrode being placed in direct contact with the uterus;

sensing electrical activity between the first and second electrodes;

detecting for uterine contractions from the sensed electrical activity; and

providing electrical current flow between the first and second electrodes when uterine contractions are undetected.

2. A method as defined in claim 1 wherein the providing step is performed when a uterine contraction is undetected within a predetermined time of an immediately preceding uterine contraction.

3. A method as defined in claim 1 wherein the providing step is performed when a uterine contraction is undetected within a predetermined time from the beginning of an immediately preceding uterine contraction.

4. A method as defined in claim 1 wherein the placing step includes anchoring the first electrode to the uterus.

5. A method as defined in claim 1 wherein the placing step includes passing the first electrode through skin of the animal.

6. A method as defined in claim 1 wherein the placing step includes releasably anchoring the first electrode to the uterus.

7. A method as defined in claim 6 wherein the placing step further includes anchoring the first electrode to the myometrium.

8. A method as defined in claim 1 wherein the placing step includes contacting the second electrode with the uterus.

9. A method as defined in claim 8 wherein the contacting step further includes anchoring the second electrode to the uterus.

10. A method as defined in claim 8 wherein the contacting Step further includes passing the second electrode through skin of the body.

11. A method as defined in claim 8 wherein the contacting step further includes placing the second electrode in direct contact with the myometrium.

12. A method as defined in claim 11 wherein the contacting step further includes anchoring the second electrode to the myometrium.

13. A method as defined in claim 8 wherein the second electrode is a surface electrode and wherein the contacting step includes making surface contact between the second electrode and the body.

14. A method as defined in claim 13 wherein the contacting step further includes making surface contact between the surface electrode and a posterior portion of the body.

15. A system for detecting for uterine contractions and stimulating a uterus of an animal having a body to initiate uterine contractions when uterine contractions are absent, the system comprising:

a first electrode;

a first anchor for anchoring the first electrode to the uterus of the animal;

return current path establishing means for establishing a return current path within the body, the return current path including the first electrode;

a sense amplifier coupled to the first electrode for sensing electrical activity of the body;

a detector coupled to the sense amplifier for detecting for contractions of the uterus from the sensed electrical activity; and

a source of electrical energy coupled to the first electrode and responsive to the detector failing to detect uterine contractions for providing electrical energy to the body along the return current path for initiating contractions of the uterus.

16. A system as defined in claim 15 wherein the detector includes a timer for timing the time since a last uterine contraction and wherein the source is responsive to the timer timing a predetermined time period since the last uterine contraction for providing the electrical energy for initiating contractions of the uterus.

17. A system as defined in claim 15 wherein the first anchor is a releasable anchor.

18. A system as defined in claim 17 wherein the first anchor is configured for anchoring the first electrode to the myometrium.

19. A system as defined in claim 18 wherein the first anchor comprises a screw-in tip.

20. A system as defined in claim 19 wherein the screw-in tip is a helical coil.

21. A system as defined in claim 19 wherein the first electrode includes structure forming the screw-in tip.

22. A system as defined in claim 17 wherein the return current path establishing means comprises a second electrode adapted for making electrical contact with the body.

23. A system as defined in claim 22 wherein the second electrode is arranged for direct contact with the uterus.

24. A system as defined in claim 23 further including a second anchor for anchoring the second electrode to the uterus.

25. A system as defined in claim 24 wherein the second anchor is arranged for anchoring the second electrode to the myometrium.

26. A system as defined in claim 24 wherein the second anchor is a releasable anchor.

27. A system as defined in claim 26 wherein the second anchor includes a screw-in tip.

28. A system as defined in claim 26 wherein the second electrode includes structure forming the second anchor.

29. A system as defined in claim 22 wherein the second electrode is a surface electrode for making surface contact with the body.

30. A system for detecting for uterine contractions and stimulating a uterus of an animal having a body to initiate uterine contractions when uterine contractions are absent, the system comprising:

first and second electrodes for establishing a return current path within the body;

an anchor for releasably anchoring at least one of the electrodes to the uterus of the animal;

a detector coupled to the first and second electrodes for detecting for uterine contractions; and

a source of electrical energy responsive to the detector failing to detect uterine contractions for applying electrical energy to the first and second electrodes for initiating contractions of the uterus.

31. A system for detecting for uterine contractions and stimulating a uterus of an animal to initiate contractions when uterine contractions are absent, the system comprising:

a sensor for sensing electrical activity of the uterus;

a processor for analyzing the electrical activity of the uterus and determining an absence of uterine contractions; and

an energy source for applying electrical energy to the uterus responsive to the processor when the electrical activity of the uterus fails to satisfy predetermined detection criteria from the absence of the uterine contractions.

32. A system for detecting for uterine contractions stimulating a uterus of an animal to initiate contractions when uterine contractions are absent, the system comprising:

a sensor for sensing electrical activity of the uterus;

means for storing data associated with the sensed electrical activity of the uterus;

a processor for analyzing the stored data and determining an absence of uterine contractions; and

an energy source for applying electrical energy to the uterus to initiate contractions of the uterus responsive to the processor when the analyzed data fails to satisfy predetermined detection criteria from the absence of the uterine contractions.

33. A method of detecting for uterine contractions and stimulating a uterus of an animal to initiate uterine contractions when uterine contractions are absent, the method including the steps of:

sensing electrical activity of the uterus;

analyzing the electrical activity of the uterus; and

applying electrical energy to the uterus to initiate contractions of the uterus when the analyzed electrical activity of the uterus fails to satisfy predetermined detection criteria.

34. A method of detecting for uterine contractions and stimulating a uterus of an animal to initiate uterine contractions when uterine contractions are absent, the method including the steps of:

sensing electrical activity of the uterus;

generating data associated with the sensed electrical activity;

storing the data associated with the sensed electrical activity;

analyzing the stored data; and

applying electrical energy to the uterus to initiate contractions of the uterus responsive to the analyzed data failing to satisfy predetermined detection criteria.