Disposable electrical connector for fetal scalp electrode

• US 5,046,965 A
• Filed: 05/04/1990
• Issued: 09/10/1991
• Est. Priority Date: 05/04/1990
• Status: Expired due to Fees

• Current Assignee: Utah Medical Products Incorporated
• Original Assignee: Utah Medical Products Incorporated
• Inventors: Neese, Jon N., Wallace, William D., Cutler, Christopher A.
• Primary Examiner(s): Schwartz, Larry I.
• Assistant Examiner(s): DAULTON, JULIE
• Application Number:
  US07/518,809
• Time in Patent Office: 494 Days
• Field of Search: 439/854, 439/855, 439/372, 439/722, 439/725, 439/410, 439/342, 439/338, 439/838, 439/859, 439/909, 439/346, 439/729, 439/889, 439/711, 439/713, 439/691, 439/697, 439/596 , 439/597, 439/696, 128/642, 128/784
• US Class Current: 439/372
• CPC Class Codes: A61B 5/288 for foetal cardiography, e.g. scalp electrodes
• CPC Class Codes: A61B 5/4362 Assessing foetal parameters
• CPC Class Codes: H01R 2201/12 for medicine and surgery
• CPC Class Codes: H01R 4/50 utilising a cam, wedge, cone or ball also combined with a screw
• CPC Class Codes: H01R 43/16 for manufacturing contact members, e.g. by punching and by bending
• CPC Class Codes: Y10S 439/909 Medical use or attached to human body

Abstract

An electrical connector of extreme simplicity for coupling leads of a fetal scalp electrode to a cable of an electrical signal monitor. The connector includes a plurality of electrically isolated wiring frame components derived from a single wiring frame and thereafter insert molded into a connector body. The wiring frame components include a pair of signal pathways passing through the connector body to couple each lead of the fetal electrode to a corresponding conductor in the cable and a reference pathway through the connector body for effecting an electrical reference coupling with the body of the patient and communicating a reference voltage through the cable to the monitor. Integrally formed on the connector body is a pivotable lead retention wing and thereon a lead retention stub. By pivoting the retention wing into a position adjacent to the connector body, the retention stub along with a lead of the fetal scalp electrode is received and clamped into a lead retention recess. Other integrally formed features of the connector body facilitate coupling and any decoupling of the retention stub from the retention recess.

Claims

1. An electrical connector for use during labor to couple signals from leads of insulated conductors of a fetal scalp electrode to a cable connected to an electrical signal monitor, said connector comprising:

a. a connector body;

b. lead retention means molded as an integral part of said connector body for releasably securing with a snap fit the leads of said insulated conductor of the fetal scalp electrode to said connector body; and

c. conductive means embedded within said connector body for electrically coupling the leads of the fetal scalp electrode through said connector body to the cable when the leads are secured by said lead retention means to said connector body said conductive means comprising;

(i). a lead contact located at said lead retention means for electrically engaging a lead of the fetal scalp electrode secured thereby to said connector body;

(ii). a signal conductor contact site located exterior of said connector body for electrically engaging a signal carrying conductor of the cable;

(iii). an insulated electrically conductive pathway extending from said lead contact through said connector body to said signal conductor contact site; and

(iv). means for effecting electrical reference coupling of a reference conductor of the cable with the body of the patient.

2. A connector as recited in claim 1, wherein said lead retention means comprises cooperating male and a female lead retention structures integrally formed on said connector body, said male and female retention structures being so configured as to grip a lead of the fetal scalp electrode placed therebetween when said male and female lead retention structures engage each other.

3. A connector as recited in claim 1, wherein said lead retention means comprises:

a. a lead retention stub integrally formed at a first location on said connector body; and

b. a lead retention recess formed on said connector body at a second location thereon, said retention recess being so located and configured as to be capable of receiving and gripping said retention stub to clamp a lead of the fetal scalp electrode in said retention recess.

4. A connector as recited in claim 3, wherein said retention stub is located on a lead retention wing integrally formed with and pivotal from said connector body into an engaged position wherein said retention stub is received in said retention recess.

5. A connector as recited in claim 4, wherein said conductive means comprises a lead contact projecting from said connector body into said retention recess for electrically engaging a lead of the fetal scalp electrode.

6. A connector as recited in claim 4, further comprising a detachment tab at a free end of said retention wing, said detachment tab projecting beyond said connector body when said retention wing is in said engaged position, thereby to afford secure leverage on said retention wing to facilitate detachment of said retention stub and retention recess when said retention wing is pivoted out of said engaged position.

7. A connector as recited in claim 1, further comprising stabilization means for securing said connector body to the body of the patient.

8. A connector as recited in claim 7, wherein said stabilization means comprises a snap receptacle for receiving a male snap fastener element attached to the body of the patient.

9. A connector as recited in claim 4, wherein said connector body comprises an upper surface and a generally planar lower surface for placement against the body of the patient.

10. A connector as recited in claim 9, further comprising an upstanding rib integrally formed with said connector body on said upper surface thereof, said rib being disposed generally parallel to said retention wing in said engaged position, whereby to afford secure leverage on said connector body when said retention wing is pivoted into said engaged position.

11. A connector as recited in claim 9, wherein said retention wing is pivotal in a plane generally parallel to said lower surface of said connector body.

12. A connector as recited in claim 9, further comprising a stabilization flange outwardly extending from said connector body at selected locations on the periphery of said lower surface thereof.

13. An electrical connector for use during labor and delivery to couple signals from leads of a fetal scalp electrode to a cable connected to an electrical signal monitor, said connector comprising:

a. a plurality of electrically isolated wiring frame components from a single wiring frame; and

b. a connector body insert molded about said plurality of wiring frame components and wherein said connector body comprises an upper surface and on an opposite side therefrom a generally planar lower surface for placement against the body of the patient, and wherein said connector body further comprises;

(i) a pair of wings integrally formed with said connector body and pivotal therefrom in a plane generally parallel to said lower surface into an engaged position against said connector body; and

(ii) an upstanding rib integrally formed with said connector body on said upper surface thereof, said rib being disposed generally parallel to said wing in said engaged position thereof.

14. A connector as recited in claim 13, further comprising lead retention means integrally formed with said connector body for securing a lead of the fetal scalp electrode to said connector body at said lead contact.

15. A connector as recited in claim 13, wherein said wiring frame components further comprising an electrically conductive reference pathway through said connector body, said reference pathway terminating in first and second ends exposed on the exterior of said connector body, said first end of said reference pathway being formed into a reference contact for effecting an electrical reference coupling with the body of the patient, and said second end of said reference pathway being formed into a cable conductor contact site for electrically engaging a conductor of the cable.

16. A connector as recited in claim 15, wherein said reference contact comprises a reference plate disposed flush with a surface of said connector body on a side thereof to be placed against the skin of the patient.

17. A connector as recited in claim 15, wherein said reference contact comprises a reference projection located within a snap receptacle formed in said connector body for receiving a male snap fastener electrically coupled to the body of the patient.

18. A connector as recited in claim 16, wherein said reference contact further comprises a reference projection located within a snap receptacle formed in said connector body for receiving a male snap fastener element coupled to the body of the patient, and wherein said reference pathway further comprises an electrical interconnection between said reference plate and said reference projection.

19. An electrical connector for use during labor to couple signals from leads of a fetal scalp electrode to an electrical signal monitor, said connector comprising:

a. a connector body;

b. a cable attached to said connector body for coupling to the monitor;

c. lead retention means formed as an integral part of said connector body for securing the leads of the fetal scalp electrode to said connector body, said lead retention means comprising;

(i) a lead retention stub located on a lead retention wing integrally formed with and pivotal from said connector body; and

(ii) a lead retention recess formed in said connector body, said retention recess being so located and configured so as to receive and grip said retention stub to clamp a lead of the fetal scalp electrode in said retention recess; and

d. conductive means for electrically coupling the leads of the fetal scalp electrode through said connector body to the cable when the leads are secured by said lead retention means to said connector body.

20. A connector as recited in claim 19, wherein said conductive means comprises a lead contact projecting from said connector body into said retention recess for electrically engaging a lead of the fetal scalp electrode.

21. A connector as recited in claim 19, wherein:

a. said cable comprises a signal conductor for communicating a signal from a lead of the fetal scalp electrode to the monitor; and

b. said conductive means comprises an electrically conductive signal pathway through said connector body, said signal pathway terminating in first and second ends projecting from said connector body, said first end of said signal pathway being formed into a lead contact for electrically engaging the lead of the fetal scalp electrode, and said second end of said signal pathway being formed into a signal conductor contact site for electrically engaging said signal conductor of said cable.

22. A connector as recited in claim 21, wherein:

a. said cable further comprises a reference conductor for communicating to the monitor an electrical reference voltage derived from the body of the patient; and

b. said conductive means further comprises an electrically conductive reference pathway through said connector body, said reference pathway terminating in first and second ends exposed on the exterior of said conductive body, said first end of said reference pathway being formed into a reference contact for effecting an electrical reference coupling with the body of the patient, and said second end of said reference pathway being formed into a reference conductor contact site for electrically engaging said reference conductor of said cable.

23. A connector as recited in claim 22 further comprising a snap receptacle for receiving a male snap fastener element secured to the body of the patient, and wherein said reference contact is located within said snap receptacle.

24. A connector as recited in claim 22, further comprising an electrically insulating sleeve disposed about the cable and the connector body at said cable conductor contact sites.

25. An electrical connector for use during labor to couple signals from a lead of a fetal scalp electrode to an electrical signal monitor, said connector comprising:

a. a connector body;

b. a cable attached to said connector body for coupling to the monitor, said cable comprising;

(i) a signal conductor for communicating a signal from a lead of the fetal scalp electrode to the monitor; and

(ii) a reference conductor for communicating to the monitor an electrical reference voltage derived from the body of the patient;

c. lead retention means molded as an integral part of said connector body for releasably securing the leads of the fetal scalp electrode to said connector body with a snap fit; and

d. a plurality of electrically isolated wiring frame components from a single wiring frame, said connector body being insert molded about said plurality of wiring frame components and said wiring frame components comprising an electrically conductive signal pathway through said connector body, said signal pathway terminating in first and second ends projecting from said connector body, said first end of said signal pathway being formed into a lead contact for electrically engaging a lead of the fetal scalp electrode, and said second end of said signal pathway being formed into a signal conductor of said cable, and wherein said wiring frame components further comprise an electrically conductive reference pathway through said connector body, said reference pathway terminating in first and second ends exposed on the exterior of said connector body, said first end of said reference pathway being formed into a reference contact for effecting an electrical reference coupling with the body of the patient, and said second end of said reference pathway being formed into a reference conductor site for electrically engaging said reference conductor of said cable.

26. A connector as recited in claim 25, wherein said reference contact comprises a reference projection located within a snap receptacle formed in said connector body for receiving a male snap fastener element electrically coupled to the body of the patient.

27. A connector as recited in claim 25, wherein said reference contact comprises a reference plate disposed flush with the surface of said connector body on the side thereof to be placed disposed against the skin of the patient.

28. A connector as recited in claim 27, wherein said reference contact further comprises a reference projection located within a snap receptacle formed in said connector body for snappingly receiving a male snap fastener element electrically coupled to the body of the patient, and wherein said reference pathway further comprises an electrical interconnection between said reference plate and said reference projection.

29. A connector as recited in claim 25, wherein said lead retention means comprises:

a. a lead retention stub integrally formed at a first location on said connector body; and

b. a lead retention recess formed on of said connector body at a second location thereon, said retention recess being so located and configured as to be capable of receiving and gripping said retention stub to clamp a lead of the fetal scalp electrode in said retention recess.

30. A connector as recited in claim 29, wherein said retention stub is located on a lead retention wing integrally formed with and pivotal from said connector body into an engaged position wherein said retention stub is received in said retention recess.

31. An electrical connector for use with a patient during labor to couple signals from the leads of a fetal scalp electrode to an electrical signal monitor, said connector comprising:

a. a connector body having an upper surface and on the opposite side therefrom a generally planar lower surface for placement against the body of the patient;

b. a lead retention wing integrally formed with said connector body and pivotal therefrom in a plane generally parallel to said lower surface thereof into an engaged position against said connector body;

c. an upstanding rib integrally formed with said connector body on said upper surface thereof, said rib being disposed generally parallel to said wing in said engaged position thereof;

d. a cable attached to said connector body for coupling to the monitor, said cable comprising;

(i) a signal conductor for communicating a signal from a lead of the fetal scalp electrode to the monitor; and

(ii) a reference conductor for communicating to the monitor an electrical reference voltage derived from the body of the patient;

e. a plurality of electrically isolated wiring frame components from a single wiring frame, said connector body being insert molded about said plurality of wiring frame components, and said wiring frame components comprising;

(i) an electrically conductive signal pathway through said connector body, said signal pathway terminating in first and second ends projecting from said connector body, said first end of said signal pathway being formed into a lead contact for electrically engaging a lead of the fetal scalp electrode, and said second end of said signal pathway being formed into a signal conductor contact site for electrically engaging said signal conductor of said cable; and

(ii) an electrically isolated conductive reference pathway through said connector body, said reference pathway terminating in first and second ends exposed on the exterior of said connector body, said first end of said reference pathway being formed into a reference contact for effecting an electrical reference coupling with the body of the patient, and said second end of said reference pathway being formed into a reference conductor contact site for electrically engaging said reference conductor of said cable;

f. a lead retention stub integrally formed on said retention wing; and

g. a lead retention recess formed in the exterior of said connector body at a second location thereon, said lead retention recess being so located and configured as to be capable of receiving and gripping said retention stub to clamp a lead of the fetal scalp electrode in said retention recess when said retention wing is in said engaged position thereof.

32. A connector as recited in claim 31, wherein said retention stub is located on a lead retention wing integrally formed with and pivotal from said connector body into an engaged position wherein said retention stub is received in said retention recess.

33. A connector as recited in claim 31, wherein said reference contact comprises:

a. a reference plate disposed flush with the surface of said connector body on the side thereof to be placed against the skin of the patient; and

b. a reference projection located within a snap receptacle formed in said connector body for receiving a male snap fastener element electrically coupled to the body of the patient, and wherein said second conductive pathway further comprises an electrical interconnection between said reference plate and said reference projection.