Devices and methods for controlled external chest compression

• US 5,645,522 A
• Filed: 05/04/1993
• Issued: 07/08/1997
• Est. Priority Date: 04/17/1991
• Status: Expired due to Term

• Current Assignee: Resqcor, LLC, Regents of the University of California (University of California)
• Original Assignee: AMBU International A/S, Regents of the University of California (University of California)
• Inventors: Cohen, Todd J., Lurie, Keith G.
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): MULCAHY, JOHN M
• Application Number:
  US08/058,195
• Time in Patent Office: 1,526 Days
• Field of Search: 601/6-14, 601/41, 601/43, 601/44, 4/255.01-255.11
• US Class Current: 601/43
• CPC Class Codes: A61H 2031/001 fixed on the chest by suction
• CPC Class Codes: A61H 2031/002 fixed on the chest by adhesives
• CPC Class Codes: A61H 2201/10 with further special therapeutic means, e.g. electrotherapy, magneto therapy or radiation therapy, chromo therapy, infrared or ultraviolet therapy
• CPC Class Codes: A61H 2230/04 Heartbeat characteristics, e.g. E.G.C., blood pressure modulation
• CPC Class Codes: A61H 31/00 Artificial respiration or heart stimulation, e.g. heart massage artificial respiration by treatment with gas or air, e.g. mouth-to-mouth respiration A61M16/00; applying electric currents by contact electrodes for stimulation, e.g. heart pace-makers A61N1/36 ; teaching or training models, demonstration models for medical purposes G09B23/288
• CPC Class Codes: A61H 31/007 Manual driven
• CPC Class Codes: A61N 1/00 Electrotherapy; Circuits therefor A61N2/00 takes precedence; irradiation apparatus A61N5/00

Abstract

A device for performing active compression/decompression cardiopulmonary resuscitation includes an applicator body with an upper surface and a lower surface. The lower surface includes provisions for detachably securing to the patient'"'"'s chest, such as a vacuum cup or an adhesive layer. For manual resuscitation, the upper surface will include a strap or other structure for securing a performer'"'"'s hand thereto. In an exemplary device, a disc-shaped handle is attached to the upper surface of a vacuum cup applicator by a short connecting stem structure. A pressure gauge mounted to the handle permits the performer to monitor how much force is being applied in both the compression and decompression phases. For automatic applications, a mechanical drive member will be secured to the upper surface. By alternately pressing and lifting on the applicator device, the patient'"'"'s chest can be compressed and expanded to improve induced ventilation and circulation.

Claims

1. A device for performing cardiopulmonary resuscitation of a patient, said device comprising:

an applicator body having an upper surface and a lower surface;

a handle secured to and extending upwardly from the upper surface of the applicator;

means on the applicator body for adhering the lower surface to the patient'"'"'s chest, whereby the performer can alternately compress and actively expand the patient'"'"'s chest by pressing and pulling on the applicator using the handle; and

a pressure gauge on the handle, said pressure gauge measuring compression force applied by the applicator.

2. A device as in claim 1, wherein the means for adhering the lower surface to the patient'"'"'s chest comprises a hollow interior in the applicator body, said hollow interior being open to the lower surface and the body being sufficiently flexible to allow the body to act as a vacuum cup.

3. A device for performing cardiopulmonary resuscitation of a patient, said device comprising:

a flexible cup having an open hollow interior a lower lip formed about the open interior;

a handle secured to and extending upwardly from the flexible cup, and

a pressure gauge on the handle, said pressure gauge measuring compression force applied by the vacuum cup.

4. A device for performing cardiopulmonary resuscitation of a patient, said device comprising

a flexible cup having a hollow interior and a lower lip formed about the open interior;

a handle secured to and extending upwardly from the flexible cup, said handle having means for manually grasping spaced-upwardly from the flexible cup;

an axially compressible spring in the handle, wherein said spring acts as a shock absorber between the handle and the flexible cup; and

a gauge on the handle which measures compression of the handle as the device is pressed against the patient'"'"'s chest.

5. A device as in claim 4, wherein the axially compressible spring comprises part of the gauge.

6. A device as in claim 5, wherein the handle has a telescoped structure with the spring therein.