| 主权项 |
1. A bottom device for use with a top device to measure depths of Cardio Pulmonary Resuscitation (CPR) chest compressions delivered to the chest of a patient placed face up on a surface, the top device intended for placement on the chest of the patient and having a top mechanism that is moveable up and down as the chest compressions are delivered to the patient and configured to measure displacement of the top device during the chest compressions, the bottom device comprising:
a generally elongate member having a near end and a distal end, the distal end configured to be placed under the chest of the patient; a handle at the near end for grasping the elongate member; a bottom mechanism positioned proximately at the distal end, and
a slide portion disposed on an underside of the bottom device, near the distal end, and configured to slide with respect to a surface, anda grip portion disposed toward the near end relative to the slide portion, the grip portion having a surface less smooth than the slide portion and configured to restrict movement on the surface on a bottom surface of the bottom device, in which: the elongate member is configured to be placed between the patient and the surface so that at least a portion of the handle protrudes from under the patient,
when the bottom mechanism is placed between the patient and the surface, the bottom device is moveable up and down as the chest compressions cause the surface to move up and down and the bottom mechanism is configured to measure displacement of the bottom device during the chest compressions, and the top mechanism and the bottom mechanism are configured to cooperate to generate a value for a net depth of the compressions of the patient chest with reference to each other based on the displacement of the top mechanism and a displacement of the bottom mechanism. |
