Emergency Care


What’s really in a defibrillation shock?


The therapeutic defibrillation dose is a defined set of electrical characteristics over a defined time, measured as energy in joules (J). This total output involves voltage (electromotive push), current (flow of electricity) and duration (delivery time). Each characteristic plays an important and different role in successful defibrillation.


Maximize conversion rates with the 360J BTE waveform

LIFEPAK defibrillators use the biphasic truncated exponential (BTE) waveform and offer the most commercially available defibrillation energy in the industry. Clinical data shows for cardiac arrest patients who need multiple shocks, 360 joules improves conversion rates. 

Low-energy defibrillators limited to 200J that use rectilinear biphasic waveforms (RBW) rely only on the level of current (A), which is only one electrical characteristic of a shock. No single characteristic of any biphasic shock waveform determines conversion rate.




Biphasic measurements testing at 90 ohms with the Physio-Control LIFEPAK 15 monitor/defibrillator, Zoll X-Series® monitor/defibrillator. Average human impedance range is approximately 70-80ohms.


Clinical overview

LIFEPAK monitor/
defibrillators and AEDs use 360J biphasic technology

Peer-reviewed, published clinical studies point to a strong association between higher conversion rates and higher biphasic defibrillation energy up to 360 joules. The Stryker full energy biphasic waveform has been evaluated in nearly twice as many cardiac arrest patients as all other device manufacturers combined. 

read the clinical overview

Clinical technology

LIFEPAK 15 with print out

12-lead and STEMI

The University of Glasgow ECG analysis program used in LIFEPAK 15
monitor/defibrillators has been used around the world for over 30 years. 

Learn more

Airway and breathing

Capnography provides an objective tool for assessing respiratory status and can guide confirming, monitoring and documenting ET tube placement. 

Learn more

Man laying on the ground with coworkers kneeling over him

CPR and circulation

High-quality and consistent CPR – from bystanders to professional first responders through the hospital – is a major link in the chain of survival. 

Learn more


1Independent survey of 200 U.S. hospitals. Calo Research Services. September 2015.

You may also be interested in:

Online training

Get started now with interactive continuing education courses, sponsored lectures, product training and webinars.

start learning

In-person training

Gain the latest information on upcoming medical conferences, symposia, learning centers and biomedical training.

find a training

Product resources

Access instructions, configuration tools, fit guides, catalogs, data sheets, performance evaluations, software updates and more.

get resources