A rechargeable power cell having no voltage across its positive and negative power terminals unless the power cell is inserted into a device configured to accept the power cell is described. The power cell includes a battery management processor and battery insertion detection circuitry that cooperate to determine when the power cell is inserted into the device and then drive an electronic switch to provide for conduction of current from the power cell to the positive terminal of the cell.

The compression sleeve with massage rollers is a medical device. The compression sleeve with massage rollers applies a compressive pressure to an appendage of a patient. The compression sleeve with massage rollers is a mechanical device. The compression sleeve with massage rollers generates a kneading action that massages the appendage of the patient. The compression sleeve with massage rollers comprises a compression structure, a plurality of massage mechanisms, and a control circuit. The plurality of massage mechanisms and the control circuit attach to the compression structure. The control circuit electrically connects to the plurality of massage mechanisms. The control circuit controls the operation of the plurality of massage mechanisms.

A cardiopulmonary resuscitation (CPR) device for performing automatic defibrillation and chest compressions on a patient and method for using same. The CPR device having a balloon configured to inflate/deflate, a belt configured to securely strap around a chest of a patient, a pair of electrode pads configured to deliver shock energy from a shock source, and, optionally, a pulse oximeter sensor. The CPR device is in electrical communication with a CPR defibrillator/ECG computer system that is configured to control the CPR device.

Systems, devices and methods for providing active and/or passive compression therapy to a body part can include a compression device worn over a compression stocking. The compression device can have a pulley based drive train that is driven by a motor to tighten and loosen compression elements, such as compression straps, in a precise, rapid, and balanced manner. Sensors can be used in the compression device and/or compression stockings to provide feedback to modulate the compression treatment parameters.

An intelligent compression device for controllable compression. The compression device includes a compressible body and a microprocessor. The compressible body encircles a limb of a user and includes an elastomer layer and an activation layer. The elastomer layer includes voxelated liquid crystal elastomers that contract in response to a stimulus. The activation element, which is positioned proximate to the elastomer layer, supplies the stimulus. The microprocessor actuates at least a portion of the activation element layer.

Improved automatic chest compression systems which use constricting belts, repeatedly inflating bladders, or reciprocating pistons to compress the chest. A bladder is placed between the chest and the particular mechanism used to compress the chest during CPR. The bladder maximizes the effectiveness of chest compressions.

A pressure cuff is provided, comprising a plurality of layers and a controller. The layers comprise: an outer covering, an outer surface of which is exposed when the pressure cuff is secured around a body part of a patient; a first conductive layer; a first insulating layer separating the outer covering and the first conductive layer; an inner covering, the inner surface of which contacts the patient or the patient's clothing when the pressure cuff is secured to the patient; a second conductive layer; a second insulating layer separating the inner covering and the second conductive layer; and a first piezoelectric support layer separating the first and second conductive layers. The controller is electrically coupled to the first and second conductive layers and configured to supply a voltage to the first and second conductive layers, whereupon the first piezoelectric support layer constricts around the body part of the patient.

Devices and methods for compressing a chest of a patient includes a platform for placement under a thorax of the patient, a compression belt for extending over an anterior chest wall of the patient, a drive train operably connected to the compression belt, a motor operably connected to the compression belt through the drive train, and a control system configured to control operation of the motor to cause the drive train to tighten and loosen the compression belt in repeated cycles of compression about the thorax of the patient. Each cycle of the repeated cycles includes tightening the compression belt around the chest of the patient after tightening, causing, by the control system, the motor to cease operation of the drive train for a hold period; and at a termination of the hold period, loosening the compression belt around the chest of the patient.

A chest compression device with a chest compression belt assembly including guards and sensors operable with a control system to control operation of the system depending on detection of proper installation of the guards.

A compression garment having one or more flex frames that can be shortened or lengthened to apply or release a compressive force to the limb or other anatomical feature of a user. The compression garment can have a wire made of shape memory material (shape memory alloy). A controller of the compression garment can supply an electrical input to the wire, generating heat that can cause the wire to contract such that the flex frame deflects to a shorter length to apply a compressive force to the limb or other anatomical feature of the user. The one or more flex frames can be contracted in unison or in sequence to direct the flow of bodily fluids in the limb or other anatomical feature of the user.