Emergency electrode

• US 4,408,610 A
• Filed: 06/12/1981
• Issued: 10/11/1983
• Est. Priority Date: 06/12/1981
• Status: Expired due to Fees

• Current Assignee: ING Limited (ANZ Group Holdings Ltd.)
• Original Assignee: Survival Technology, Inc. (Meridian Medical Technologies Incorporated)
• Inventors: Sarnoff, Stanley J.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US06/272,973
• Time in Patent Office: 851 Days
• Field of Search: 128/639, 128/642, 128/784, 128/785, 273/84 ES, 231/2 E
• US Class Current: 600/374
• CPC Class Codes: A61B 5/283 Invasive

Abstract

An emergency electrode comprising a housing assembly, a stressed spring mounted within the housing assembly so as to be released in response to a predetermined manual actuation procedure, an electrode hypodermic needle member mounted within the housing assembly in a sterile condition in cooperating relation with the stressed spring for movement outwardly of the housing assembly in response to the release of the stressed spring so as to penetrate into the muscle tissue of a patient, a bendable wire member extending outwardly from the hollow interior adjacent the leading end thereof in a trailing direction for yieldably retaining the leading end portion of said hypodermic needle in penetrating condition within the muscle tissue of a patient. An electric circuit is completed exteriorly through the needle when in said penetrating relation within the muscle tissue of a patient.

Claims

1. An emergency electrode comprising:

a housing assembly,

stressed spring means mounted within said housing assembly so as to be released in response to a predetermined manual actuating procedure,

an electrode needle structure mounted within said housing assembly in a sterile condition in cooperating relation with said stressed spring means for movement outwardly of said housing assembly in response to the release of said stressed spring means so as to penetrate into the muscle tissue of a patient,

said needle structure being a hypodermic needle member provided with a hollow interior and having a bendable wire member extending outwardly from said hollow interior adjacent the leading end thereof in a trailing direction for yieldably retaining the leading end portion of said hypodermic needle member in penetrating condition within the muscle tissue of a patient,

said hypodermic needle member being encased within a resilient shroud within said housing assembly through which the leading end portion thereof extends when moved outwardly of said housing assembly, and

means for completing an electric circuit exteriorly through said needle structure when in said penetrating relation within the muscle tissue of a patient.

2. An emergency electrode as defined in claim 1 wherein said electric circuit completing means includes a support member of electrically conductive material fixedly connected to the trailing end portion of said needle structure and a plunger of electrically conductive material disposed in electrically conductive operatively fixed relation with respect to said support member, said stressed spring means being connected with said plunger member to move the same in said outward direction in response to the release of said stressed spring means.

3. An emergency electrode as defined in claim 2 wherein said spring means includes a compression coil spring surrounding the major portion of said plunger member and acting between said housing assembly and said plunger member.

4. An emergency electrode as defined in claim 3 wherein said housing assembly includes an inner tubular housing member having a rearward spring chamber within which said plunger member and coil spring are mounted and a communicating forward chamber within which said hypodermic needle member and said support member are mounted.

5. An emergency electrode as defined in claim 4 wherein said plunger member includes spring fingers having releasable locking portions on the rearward free ends thereof, and a locking disc carried by the rearward end of said inner housing member through which said releasable locking portions extend and against which said releasable locking portions are releasably engaged.

6. An emergency electrode as defined in claim 5 wherein said housing assembly includes an outer housing member extending over said inner housing member and mounted for limited axial movement with respect thereto, the rearward end portion of said outer housing member having surface means for moving said releasable locking portions radially inwardly toward one another out of engagement with said locking disc in response to a limited relative axial movement between said housing members in one direction.

7. An emergency electrode as defined in claim 6 including a removable safety pin between said releasable locking portions preventing said movement thereof radially toward one another.