Apparatus for providing cpr including automated cpr chest compression device

An apparatus for providing cardiopulmonary resuscitation (CPR) to a patient, comprising:

• a positioning device that is attachable to the patient to provide counterpressure at the back of the patient during CPR compression;
• an automated chest compression device configured to be mounted to the positioning device and configured, once mounted to the positioning device, to provide CPR compression of the chest of the patient, the automated chest compression device comprising:
• an actuator plate rotatably mounted about a rotation shaft, wherein the rotation shaft is mounted off a center of area of the actuator plate;
• a power delivery unit operable to rotate the actuator plate about the rotation shaft;
• a chest compression plate configured to move linearly in a direction orthogonal to the rotation shaft as a result of rotation of the actuator plate and based on a shape of the actuator plate;
• wherein engagement of the actuator plate with the chest compression plate converts rotary motion of the actuator plate into linear motion of the chest compression plate;
• at least one linear rail mounted to the chest compression plate at a location spaced away from the actuator plate rotation shaft, said at least one linear rail being configured to stabilize the linear motion of the chest compression plate as it moves linearly, without the linear rail deriving any power from the rotation of the actuator;
• wherein a first portion of the shape of the actuator plate is curved outward and occupies a first segment of the rotation of the actuator plate, and a second portion of the shape of the actuator plate is not curved outward and occupies a second segment of the rotation of the actuator plate;
• wherein the automated chest compression device comprises no mechanism to move the chest compression plate away from the patient's chest during the second segment of rotation of the actuator;
• whereby, when the automated chest compression device is positioned against a chest of the patient in need of cardiopulmonary resuscitation (CPR), rotation of the actuator plate
• causes the actuator plate to engage with and exert pressure against the chest compression plate during the first segment of rotation of the actuator plate, causing the chest compression plate to move linearly towards the patient's chest and to thereby induce compression of the patient's chest, and
• causes the actuator plate to disengage from and exert no pressure against the chest compression plate during the second segment of rotation of the actuator plate to thereby allow decompression of the patient's chest.