Sep 10, 2005

Use of an impedance threshold device improves short-term outcomes following out-of-hospital cardiac arrest

Resuscitation
Roger C ThayneAnton Van Dellen

Abstract

An impedance threshold device (ITD) has been developed for the treatment of cardiac arrest to augment circulation to the heart and brain during cardiopulmonary resuscitation (CPR). The ITD has ventilation timing lights that flash at 12 min(-1) to discourage excessive ventilation rates. Implementation of the ITD during conventional manual CPR in a large emergency medical services (EMS) system (Staffordshire, UK) is safe, feasible and will improve short-term survival. ITD use was implemented by the Staffordshire Ambulance Trust, which treats 1600 cardiac arrests per year with 90 advanced life support (ALS) units and an average response time of 6.3 min. During training, rescuers learned to use the ventilation timing lights to discourage hyperventilation. Rescuers applied the device after tracheal intubation. They were trained to allow the chest to recoil fully after each compression. Prospective ITD use in adults receiving conventional manual CPR for non-traumatic cardiac arrest was compared to matched historical controls receiving conventional manual CPR without inspiratory impedance. All received similar ALS care. The primary endpoint was admission to the emergency department (ED) alive following cardiac arrest. Chi-square, Fish...Continue Reading

Mentioned in this Paper

Electric Impedance
Emergency Care
Trachea
Survival Analysis
Breath
Basic Cardiac Life Support
Entire Chest Wall
Sleep Disorders, Circadian Rhythm
Blood Flow
Etiology

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