Chest Compression Device Improves Resuscitation Efforts

The ZOLL AutoPulse Automated Chest Compression System deploys a load-distributing swath named LifeBand that consistently squeezes the entire chest, automatically calculating the size, shape, and resistance of each patient's chest. By automating chest compressions, the device delivers improved blood flow, and provides hospital- and ambulance-based caregivers better access to the patient, resulting in the possibility of improved survival for cardiac arrest victims. The device also minimizes the time windows where compressions are not traditionally received, such as during transporting or while relieving tiring rescuers; it also allows the rescuers to provide compressions while performing other life-saving activities.

A pressure sensor measures the amount of pressure on the board when the band tightens during initial sizing; using this measurement, the AutoPulse then calculates the amount of compression required for the specific patient. The rate of compressions is lower than for manual, unidirectional CPR compressions, as the chest cavity takes longer to recover from a circumferential compression. The ZOLL AutoPulse Automated Chest Compression System is a product of ZOLL (Chelmsford, MA, USA), and is designed for adults with weight of no more than 136 kg, with chest circumference of 76 cm to 130 cm, and chest width of 25 cm to 38 cm.

"The AutoPulse is currently included in the just released 2010 American Heart Association Guidelines for CPR and emergency cardiovascular care science as a Class IIb intervention, with a recommendation for additional studies,” said Richard Packer, CEO of ZOLL. "We expect to see the AutoPulse become a standard element of an integrated approach to resuscitation.”

Manual CPR is the current standard for providing temporary circulatory support and oxygen delivery during cardiac arrest; delivery of manual CPR, however, is not provided consistently. Significant decreases in quality have been seen after as little as one minute, due mainly to the physical challenges associated with providing consistent manual CPR, mainly operator fatigue. Mechanical chest compression devices have been developed to overcome the difficulties in consistent performance of manual CPR.

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