A CPR machine (100) is configured to perform, on a patient's (182) chest, compressions that alternate with releases. The CPR machine includes a compression mechanism (148), and a driver system (141) configured to drive the compression mechanism. A force sensing system (149) may sense a compression force, and the driving can be adjusted accordingly if there is a surprise. For instance, driving may have been automatic according to a motion-time profile, which is adjusted if the compression force is not as expected (850). An optional chest-lifting device (152) may lift the chest between the compressions, to assist actively the decompression of the chest. A lifting force may be sensed, and the motion-time profile can be adjusted if the compression force or the lifting force is not as expected.

A mechanical cardiopulmonary resuscitation (CPR) device includes a compression mechanism, a support structure, and a light source. The compression mechanism is configured to perform successive CPR compressions to a chest of a patient and includes, in one example configuration, a translucent suction cup, a piston, and a driver coupled to the piston and configured to extend the piston toward the chest of the patient and retract the piston away from the chest of the patient. The support structure is configured to position the compression mechanism over the chest of the patient. The light source is configured to illuminate the translucent suction cup.

An automated chest compression (CC) system is described that includes a chest compressor configured to administer chest compressions to a patient, at least one tilt adjuster configured to tilt at least the head of the patient to a tilt angle during the administration of chest compressions to the patient, a patient support structure configured to couple to the chest compressor and to the at least one tilt adjuster, one or more tilt sensors, and a CC device controller configured to control the chest compressor to administer the chest compressions at a resuscitative rate, receive one or more signals, from the one or more tilt sensors, indicative of the tilt angle, determine tilt angle information from the one or more signals indicative of the tilt angle, and provide the tilt angle information to a user interface, wherein the patient support structure is adapted to support the back of the patient.

Chest compression machine systems and methods adjust the administration of patient treatment based on received physiological parameter measurements, such as a CO.sub.2 measurement. Adjustment of the administered chest compressions can include adjusting one or more chest compression parameters, such as the depth of the administered compressions, the administration of active decompressions, adjusting the height of active decompression, adjusting the rate of compressions and/or active decompressions and/or other changes to one or more properties, or characteristics, of the administered chest compressions and/or active decompressions.

A CPR machine (100) is configured to perform, on a patient's (182) chest, compressions that alternate with releases. The CPR machine includes a compression mechanism (148), and a driver system (141) configured to drive the compression mechanism. A force sensing system (149) may sense a compression force, and the driving can be adjusted accordingly if there is a surprise. For instance, driving may have been automatic according to a motion-time profile, which is adjusted if the compression force is not as expected (850). An optional chest-lifting device (152) may lift the chest between the compressions, to assist actively the decompression of the chest. A lifting force may be sensed, and the motion-time profile can be adjusted if the compression force or the lifting force is not as expected.

Systems and methods related to the field of cardiac resuscitation, and in particular to devices for assisting rescuers in performing cardio-pulmonary resuscitation (CPR) are described herein. The system includes an applicator device configured to provide ACD CPR treatment to a patient's chest according to a plurality of phases at least one sensor configured to be coupled to the patient's chest and to measure at least one parameter related to the ACD CPR treatment and information for determining whether at least one transition point of the ACD CPR treatment has been reached; and one or more processors configured to provide a feedback signal based on a parameter for administering ACD CPR treatment to the patient's chest according to a desired treatment protocol.

Among other things, in one aspect, we describe a system for assisting with cardiopulmonary resuscitation (CPR). The system includes at least one sensor; and one or more processors configured for calculating a chest compliance relationship based on data received from the at least one sensor, and determining a neutral position of chest compression based at least in part on a feature of the chest compliance relationship. The system can take the form of an active compression-decompression device.

A cardiopulmonary resuscitation (CPR) device has a clamp mechanism coupled with a support leg, structured to move between an unlocked position and a locked position to secure the support leg to a locking rod of a base member. The CPR device further includes a movable stopper comprising a strip-formed spring slidably coupled with the support leg and configured to translate between a barred position and an unbarred position relative to the clamp mechanism, the movable stopper preventing the locking rod from being received in the receiving channel of the when the movable stopper is in the barred position, and the movable stopper allowing the locking rod to be received in the receiving channel when the movable stopper is in the unbarred position, the movable stopper further receiving the pin of the barrel in a slot when the movable stopper is in the unbarred position.

CPR systems and/or CPR devices that are configured to operate in association with a particular duty cycle are disclosed. An example mechanical chest compression device includes a processor(s) and a chest compressing mechanism configured to be disposed on a chest of a subject and to move for administering chest compressions to the subject. The processor(s) is configured to cause the chest compressing mechanism to move for administering the chest compressions to the subject over a series of compression-decompression cycles, wherein a compression-decompression cycle of the series of compression-decompression cycles includes a compression phase that is shorter than a decompression phase. The processor(s) is further configured to determine, during the compression phase, that a criterion is satisfied, and to cause the chest compressing mechanism to transition to movement that corresponds to the decompression phase in response to determining that the criterion is satisfied.

An automated chest compression (CC) system is described that includes a chest compressor configured to administer chest compressions to a patient, at least one tilt adjuster configured to tilt at least the head of the patient to a tilt angle during the administration of chest compressions to the patient, a patient support structure configured to couple to the chest compressor and to the at least one tilt adjuster, one or more tilt sensors, and a CC device controller configured to control the chest compressor to administer the chest compressions at a resuscitative rate, receive one or more signals, from the one or more tilt sensors, indicative of the tilt angle, determine tilt angle information from the one or more signals indicative of the tilt angle, and provide the tilt angle information to a user interface, wherein the patient support structure is adapted to support the back of the patient.