Method and Device for Performing Alternating Chest Compression and Decompression

• US 20150105705A1
• Filed: 12/18/2014
• Published: 04/16/2015
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Inventors: Freeman, Gary
• Granted Patent: US 9,655,809 B2
• Time in Patent Office: Days
• US Class Current: 601/41
• CPC Class Codes: A61H 2031/001 fixed on the chest by suction
• CPC Class Codes: A61H 2201/013 Suction cups
• CPC Class Codes: A61H 2201/1215 Rotary drive
• CPC Class Codes: A61H 2201/123 Linear drive
• CPC Class Codes: A61H 2201/1664 linear
• CPC Class Codes: A61H 2230/04 Heartbeat characteristics, e.g. E.G.C., blood pressure modulation
• CPC Class Codes: A61H 31/006 Power driven
• CPC Class Codes: A61N 1/3968 Constructional arrangements, e.g. casings A61N1/375 takes precedence

Abstract

A plunger adapter and a detachable compression pad for piston driven chest compression devices optimizes the application of chest compressions to a fixed location on a patient'"'"'s chest. The detachable compression pad may be removably secured to the patient above the patient'"'"'s sternum to ensure that the compression pressure from the piston through the piston adapter is applied to a fixed location on the patient'"'"'s chest. As the plunger and plunger adapter retract from the chest, the compression pad remains fixed to the patient'"'"'s chest, and as the plunger and plunger adapter extend from the chest compression unit for subsequent compression strokes, the distal end of the plunger adapter reengages the compression pad to apply compression to a fixed location on the patient'"'"'s chest.

Claims

1. A method of performing chest compression and decompression on a patient comprising the steps:

providing a mounting structure surrounding the patient'"'"'s chest;

securing a chest compression unit on the mounting structure apposing the patient'"'"'s sternum, the chest compression unit including a reversible motor, a plunger having a distal end and a proximal end, the proximal end of the plunger operably coupled to the reversible motor, the distal end of the plunger extending from and withdrawing into the housing to perform chest compression on the patient;

providing an motor control unit operably connected to the motor to control the motor and the plunger;

providing a compression pad over the sternum of a patient, the compression pad having a distal end and a proximal end, the proximal end engaging the plunger and the distal end having a two or more suction cups formed therein; and

initiating cyclic chest compressions and decompressions through the motor control unit.

2. The method of claim 1 wherein the motor control unit further comprises a microprocessor.

3. The method of claim 1 further comprising the steps:

providing a plunger adapter secured to the distal end of the plunger;

wherein the proximal end of the compression pad removably engages the plunger adapter.

4. The method of claim 3 wherein the plunger adapter comprises:

a generally cylindrical adapter with a proximal end and a distal end, the proximal end removably engaging the distal end of the plunger, the distal end of the plunger adapter having a frustoconical socket for engaging the compression pad; and

wherein the compression pad further comprises a frustoconical extension for removably engaging the distal end of the plunger adapter.

5. The method of claim 3 wherein the plunger adapter comprises:

a generally cylindrical plunger adapter with a proximal end and a distal end, the proximal end removably engaging the distal end of the plunger, the distal end of the plunger adapter for engaging the compression pad; and

wherein the compression pad further comprises a generally cylindrical socket for removably engaging the distal end of the plunger adapter.

6. The method of claim 3 wherein the compression pad includes 10 or more suction cups.

7. The method of claim 3 wherein the two or more suction cups are at least two different sizes.

8. The method of claim 3 wherein the two or more suction cups have at least two different shapes.

9. An improved chest compression device of the type with a chest compression unit, a mounting device for mounting the chest compression unit on a patient, the chest compression unit comprising a housing, a plunger having a distal end and a proximal end, the proximal end of the plunger disposed in the housing, a reversible motor, a mechanical device connected from the motor to the proximal end of the plunger for driving the plunger in a reciprocating manner with respect to the housing and for translating rotational motion of the motor to linear motion of the plunger, an motor control unit connected to the motor and including a microprocessor, a first monitor operable for monitoring the position of the plunger in respect of the housing, a second monitor operable for monitoring the position of the plunger in respect of the mechanical device for translating rotational motion to linear motion or the rotor, the positions monitored by the first and second monitors being communicated to the motor control unit, wherein the improvement comprises:

a compression pad with a distal end and a proximal end, the proximal end engaging the plunger and the distal end having a two or more suction cups formed therein.